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DELPH Seismic

Interpretation

User Guide

DELPH Seismic Interpretation – User Guide

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MU-DSI-AN-v30 Ed. A – May 2014 i


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MU-DSI-AN-v30 Ed. A – May 2014 ii


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MU-DSI-AN-v30 Ed. A – May 2014 iii


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MU-DSI-AN-v30 Ed. A – May 2014 iv

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Overview of DELPH Seismic Interpretation User Guide

This document is the User Manual for DELPH Seismic Interpretation. It must be read and

understood prior to using the DELPH Seismic Interpretation software.

The manufacturer shall in no case be held liable for any application or use that does not

comply with the stipulations in this manual.

DELPH Seismic Interpretation User Manual is divided into several parts:

• Part 1: Introduction – This part introduces the software, its purpose, architecture and

functionalities.

• Part 2: Getting Started with DELPH Seismic Interpretation – This part helps the

beginner to go through the preliminary steps taking place before actual use of the

software.

• Part 3: Managing a Project – This part describes the project structure, the project

database selection, the geometry file and the geodesic settings.

• Part 4: DELPH RoadMap – This part is devoted to the 3D visualization application

common to all imagery data.

• Part 5: DELPH Seismic Interpretation – This part describes the functionalities

available in the software.

• Part 6: GeoSections – This part describes the GeoSection tool allowing advanced

geographic interpretation of the seismic profiles.

• Part 7: Digital Terrain Modeling – This part explains how to build DTMs from the

layers of seismic profiles.

The abbreviations and acronyms used in this manual are listed hereafter.

A Table of Contents is available in the following pages to allow a quick access to

dedicated information.

MU-DSI-AN-v30 Ed. A – May 2014 v


Text Usage and Icons

bold Bold text is used for items you must select or click in the

software. It is also used for the field names used into the dialog

box. Courier Text in this font denotes text or characters that you should enter

from the keyboard, the proper names of disk Drives, paths,

directories, programs, functions, filenames and extensions.

italic Italic text is the result of an action in the procedures.

The Note icon indicates that the following information is of interest to the operator and

should be read.

MU-DSI-AN-v30 Ed. A – May 2014 vi


Abbreviations and Acronyms

DTM Digital Terrain Model

GIS Geographic Information System

KP Kilometer Point

SEG-Y Society of Exploration Geophysicists seismic data format

SHP ESRI Shape File Format

TVF Time Varying Filter

XTF EXtended Triton Format.

MU-DSI-AN-v30 Ed. A – May 2014 vii


Table of Contents

I INTRODUCTION ...........................................................................................................................1

II GETTING STARTED WITH DELPH SEISMIC INTERPRETATION ...........................................................4 II.1 System Requirements .........................................................................................................4

II.2 Managed and Created Files Types .....................................................................................4 II.3 Installing DELPH Seismic Interpretation ............................................................................5

II.4 Service Pack ........................................................................................................................7

II.5 Managing License ...............................................................................................................8 II.5.1 File Protection ..................................................................................................................8

II.5.2 Dongle Protection .............................................................................................................9

III MANAGING A PROJECT ..............................................................................................................11

III.1 Introduction .......................................................................................................................11 III.2 Project File Structure ........................................................................................................11

III.3 Creating or Selecting a Project Database ........................................................................12

III.4 Using an Geometry File from DELPH Acquisition ...........................................................14 IV DELPH ROADMAP ...................................................................................................................15

V DELPH SEISMIC INTERPRETATION .............................................................................................16 V.1 Introduction .......................................................................................................................16 V.1.1 Real Time Mode .............................................................................................................17

V.1.1.1 Launch the Real Time Interpretation ...............................................................................17 V.1.1.2 Real Time Log ................................................................................................................20 V.1.1.3 DELPH Seismic Interpretation Window in Real Time ......................................................21 V.1.2 Replay Mode ..................................................................................................................22

V.2 Window Components ........................................................................................................24 V.2.1 Window Description ........................................................................................................24

V.2.2 Side Windows ................................................................................................................26

V.2.3 Menu and Tool Bars .......................................................................................................27

V.2.4 Using the Keypad and the Mouse ...................................................................................32

V.2.5 Displayed Units ..............................................................................................................32

V.2.6 Processing Window Description and Handling ................................................................34

V.2.7 Interpretation Window.....................................................................................................35

V.2.8 Customizing the Display .................................................................................................36

V.3 Correcting from the Layback and System Geometry ......................................................37 V.3.1 Editing the Layback ........................................................................................................38

V.3.2 Editing the Geometry Offsets ..........................................................................................41

V.3.3 Starting the Process .......................................................................................................42

V.4 Defining Geodetic Settings ...............................................................................................43 V.4.1 Geodesy Menu in Real Time Mode .................................................................................44

V.4.2 Geodesy Menu in Replay Mode ......................................................................................45

MU-DSI-AN-v30 Ed. A – May 2014 viii


V.4.3 Geodesy Selection ........................................................................................................ 48

V.5 Processing Data ............................................................................................................... 51 V.5.1 Exporting and Importing Processing Parameters............................................................ 51

V.5.2 Multichannel Seismic Data............................................................................................. 51

V.5.3 Choosing Sound Velocity Data ...................................................................................... 52

V.5.4 Processing Temporal Data ............................................................................................ 52

V.5.4.1 Chirp Parameters .......................................................................................................... 52 V.5.4.2 High and Low Pass Filtering .......................................................................................... 53 V.5.4.3 Gain Control .................................................................................................................. 58 V.5.4.4 Removing the Water Column ......................................................................................... 61 V.5.4.5 Deconvoluting a Signature ............................................................................................. 62 V.5.4.6 Removing Multiple ......................................................................................................... 64 V.5.5 Processing Spatial Data ................................................................................................ 66

V.5.5.1 Horizontal Stacking........................................................................................................ 66 V.5.5.2 Filtering the Swell .......................................................................................................... 67 V.5.5.3 Correcting the Heave ..................................................................................................... 68 V.5.5.4 Correcting Topography from the Sensor Depth .............................................................. 68 V.5.6 Detecting the Bottom and the Reflectors ........................................................................ 69

V.5.6.1 Tracking the Bottom ...................................................................................................... 69 V.5.6.2 Tracking the Reflectors .................................................................................................. 71

V.6 Interpreting Data............................................................................................................... 72 V.6.1 Digitizing Bottom and Reflectors .................................................................................... 72

V.6.1.1 Creating a Reflector....................................................................................................... 72 V.6.1.2 Importing a Reflector ..................................................................................................... 73 V.6.1.3 Drawing a Bottom/Reflector ........................................................................................... 75 V.6.1.4 Displaying the Filtered Bottom ....................................................................................... 79 V.6.1.5 Suppressing a Fragment or the Entire Bottom/Reflector ................................................. 80 V.6.1.6 Modifying a Bottom/Reflector Fragment ......................................................................... 81 V.6.1.7 Modifying the Filtered Bottom Line ................................................................................. 82 V.6.1.8 Display the First Multiple of the Bottom/Reflector ........................................................... 82 V.6.2 Managing the Crossings of Reflectors............................................................................ 83

V.6.2.1 Computing the Crossings .............................................................................................. 83 V.6.2.2 Navigating Between Profiles using Crossings ................................................................ 84 V.6.3 Applying Tide and Static Corrections ............................................................................. 86

V.6.3.1 Tide Corrections ............................................................................................................ 87 V.6.3.2 Static Corrections .......................................................................................................... 90 V.6.4 Adding Annotations ....................................................................................................... 92

V.6.4.1 Selecting Objects .......................................................................................................... 93 V.6.4.2 Drawing Straight Lines................................................................................................... 98 V.6.4.3 Drawing Poly-lines ......................................................................................................... 98 V.6.4.4 Drawing Polygons ......................................................................................................... 98 V.6.4.5 Drawing Rectangles ...................................................................................................... 99 V.6.4.6 Drawing Ellipses ............................................................................................................ 99 V.6.4.7 Inserting Symbols .......................................................................................................... 99 V.6.4.8 Inserting Images ...........................................................................................................100 V.6.4.9 Customizing Color ........................................................................................................100 V.6.4.10 Customizing Text..........................................................................................................101

MU-DSI-AN-v30 Ed. A – May 2014 ix


V.6.4.11 Customizing Shapes .................................................................................................... 101 V.6.5 Adding, Importing and Displaying Ground Truthing ....................................................... 102

V.7 Exporting Data ................................................................................................................ 103 V.7.1 Exporting Interpretation ................................................................................................ 103

V.7.1.1 Exporting Digitized Reflectors in HTML Format ............................................................. 103 V.7.1.2 Exporting Digitized Reflectors in CSV Format ............................................................... 104 V.7.1.3 Exporting Thickness ..................................................................................................... 107 V.7.2 Exporting Imagery ........................................................................................................ 109

V.7.2.1 Exporting in TIF Format ................................................................................................ 109 V.7.2.2 Exporting with the Snapshot Tool ................................................................................. 111 V.7.2.3 Exporting the Interpreted Profile ................................................................................... 111 V.8 Printing Data.................................................................................................................... 113 VI GEOSECTIONS........................................................................................................................ 115

VI.1 Introduction ..................................................................................................................... 115

VI.2 Excluding Bad Data Areas .............................................................................................. 115 VI.2.1 Ping Exclusion.............................................................................................................. 115

VI.2.2 Range Exclusion .......................................................................................................... 116

VI.2.3 Cancelling Data Exclusion ............................................................................................ 116

VI.3 Building GeoSections ..................................................................................................... 117 VI.3.1 GeoSection Principle .................................................................................................... 117

VI.3.2 Building GeoSections in Replay Mode .......................................................................... 117

VI.3.3 Building GeoSections in Real Time ............................................................................... 120

VII DIGITAL TERRAIN MODELING ................................................................................................... 121 VII.1 Introduction ..................................................................................................................... 121

VII.2 Excluding Bad Data Areas .............................................................................................. 121

VII.3 Building DTMs ................................................................................................................. 121 VII.3.1 Parameters .................................................................................................................. 121

VII.3.2 Launching the DTMs Building ....................................................................................... 122

VII.3.2.1 From DELPH Seismic Interpretation ............................................................................. 122 VII.3.2.2 From DELPH RoadMap ................................................................................................ 124

VII.4 Building an Isopach Map ................................................................................................ 126 VII.4.1 Definition ...................................................................................................................... 126

VII.4.2 Parameters .................................................................................................................. 126

VII.4.3 From DELPH RoadMap ................................................................................................ 127

VII.4.4 From DELPH Seismic Replay Loader ........................................................................... 127

VII.5 Building Iso-Contours ..................................................................................................... 128 VII.6 Exporting DTMs to Google Earth.................................................................................... 128

VII.7 Visualizing in DELPH RoadMap ...................................................................................... 129 IXBLUE CONTACT - SUPPORT 24/7 CUSTOMER SUPPORT HELPLINE ............................... 130

IXBLUE CONTACT - SALES ........................................................................................................ 131

APPENDICES................................................................................................................................. 132

MU-DSI-AN-v30 Ed. A – May 2014 x


A. XMD DTM and XMS GeoSection File Formats ................................................................132 A.1 XMD DTM File Format ..................................................................................................132

A.2 XMS GeoSection File Format .......................................................................................133

B. Additional Tools ..............................................................................................................134 B.1 DELPH Geodetic Converter ..........................................................................................134

B.2 DELPH Nav Inverter .....................................................................................................136

B.3 DELPH Nav Extractor ...................................................................................................137

B.4 DELPH Nav Inserter - Time ..........................................................................................139

B.5 DELPH Nav Inserter - Ping ...........................................................................................142

B.6 DELPH Nav Inverter .....................................................................................................143

B.7 MosaicToXYZ ...............................................................................................................144

B.8 MosaicToKML ..............................................................................................................144

B.9 MosaicToTiff.................................................................................................................145

B.10 Data File Cropper .........................................................................................................146

B.11 XTF to SEG-Y – SubBottom .........................................................................................147

B.12 Edgetech JSF to XTF ...................................................................................................148

B.13 DELPH SEG-Y Tools ....................................................................................................149

C. Units .................................................................................................................................150

MU-DSI-AN-v30 Ed. A – May 2014 xi


I INTRODUCTION

DELPH Seismic software represents the new generation of seismic and sub-bottom

profiler data acquisition and processing software from iXBlue. The total software package

is composed of three sets of applications:

• A data logger, monitoring data streams and recording into SEG-Y and XTF format.

• A processing application, for profile visualization and application of a selection of

processing tools. • Geographic tools for processing and interpreting the data.

This three-fold architecture is devised for a number of reasons, including:

• Providing a simpler interface for field engineers responsible of monitoring and

recording data from a number of survey instruments.

• Providing a more streamlined method for configuring the software before a survey.

• Separating the data logging component of a survey program from the processing and

interpretation components to provide greater stability to the logging software.

Advancements in processing and modifications of those software applications will not

influence the core responsibility of conducting a survey – logging good quality seismic

or sub-bottom data.

• Moving the analysis of seismic and sub-bottom data away from time-referenced or

shot-referenced paper record interpretations towards true geo-referencing of the data

in real-time or replay.

The use of sophisticated, multi-component survey platforms composed of multi-beam

sonar, side-scan sonar, and sub-bottom profilers is becoming the standard for offshore

mapping operations. In addition, it is common for a Local Area Network (LAN) to be installed on a vessel and

for the division of work offshore to be split between engineers responsible for acquiring the

data and geologists / geophysicists responsible for processing and interpreting the data.

The architecture of DELPH Seismic Interpretation reflects those new survey strategies.

DELPH Seismic Interpretation is a set of software that allows you, both in real time and

replay modes, to (see Figure 1 and Figure 2):

• Access data real time and post-processing (DELPH Real Time Monitor software,

DELPH RoadMap software, DELPH Seismic Replay Loader module)

• Process data (DELPH Seismic Interpretation software)

• Display data (DELPH RoadMap)

Application

Benefits

Survey Strategies

Architecture

MU-DSI-AN-v30 Ed. A – May 2014 1


Figure 1 – Real time mode DELPH Seismic Interpretation architecture

Figure 2 – Replay mode DELPH Seismic Interpretation architecture



Raw data consists in:

• Seismic signal data, acquired simultaneously or not, during a survey along survey lines

(where Profiles are generated).

• Vessel navigation data.

Once data has been processed, bottom and reflectors can be tracked.

Then the crossings can be computed and Digital Terrain Models (DTM) can be built.

All along the various processing, processed data can be visualized, printed and exported.

Geo-referenced images of the seismic profile are displayed as GeoSections in DELPH

RoadMap.



II GETTING STARTED WITH DELPH SEISMIC INTERPRETATION

II.1 System Requirements

The minimum PC configuration must be: • An Intel Pentium® IV or faster CPU running on a Microsoft® Windows®-based

computer (Windows® XP Service pack 2 minimum)

• 512 MB of RAM for data logging, 1 GB as minimum for full interpretation package

(excluding the memory required by the operating system)

• 500 MB of disk space for installation files

• Enough storage space to hold all data

• 3D Graphical board supporting OpenGL for DELPH RoadMap application

The standard PC configuration is:

• Intel Core 2 Duo @ 3 GHz CPU running on a Microsoft® Windows®-based computer

(Windows® XP Service pack 2 minimum)

• 4 GB of RAM for the complete interpretation package

II.2 Managed and Created Files Types

DELPH Seismic Interpretation records or plays back various types of file, these are for:

• Raw data: .tra (Elics files), .seg (standard SEG-Y) and .xtf (Chirp)

• Processed data: _prc.tra, _prc.xtf XTF (Chirp) or standard _prc.seg SEG-

Y, these files are written at first opening of each profile

• Interpretation data: .dsi, these files are written at first opening of each profile

• Processing parameters files: .prm extension, these files are updated at each

processing performed on the raw data

• Exported reflector file: .csv extension (CSV format Comma Separated Value) or

.htm extension (HTML format)

• Index File: .idx extension, these files are associated to each .xtf file, they are used

for a fast access inside the .xtf file

• GeoSections files: .xms extension, a GeoSection is composed of a .xms file (XML

text file) and a number of .tif files. See Appendix A.2 for details about this format

• Thickness files: .csv extension (CSV format Comma Separated Value) or .htm

extension (HTML format)

• Annotation files: .ano extension

• Image files: .tif extension. Image format used for export. May be coupled with a geo

referenced file with .tfw extension.

• DTM files: .xmd extension, a DTM is composed of a .xmd file and a number of .tif/.tfw

files. See Appendix A.1 for more details about this format.

Minimum

Standard



II.3 Installing DELPH Seismic Interpretation

iXBlue issues a Release DVD to new customers and EMA (Extended Maintenance

Agreement) members containing the latest version of the software. An installation wizard

helps you through the installation.

Step Action

1. Insert DELPH software DVD in the DVD drive.

A welcome window appears:

2. Click on Install and follow the next steps by clicking on Next, and then Install.

Procedure



Step Action

3. • Wait until the installation is finished.

The following folders are created on the workstation hard disk:

• The following shortcuts are displayed on your computer desktop in DELPH

Interpretation folder:

4. End of procedure.

The sample data are installed by default. They can help you to learn how to manipulate

the software. These sample data are often used in the present document.



II.4 Service Pack

In addition to the Release DVD, Service Packs are periodically released to fix bugs and

add features reported or requested by users. In such a case, iXBlue provides to you a

Service Pack DVD.

Do not remove DELPH software from your computer before installing the service pack.

Procedure

Step Action

1. Open the DVD main folder.

You find a release note .pdf file and a service pack folder (its name depends of the

software package).

2. Read the release notes .pdf file.

3. Copy the files from the service pack folder to your DELPH folder.

The service pack is now operating.




II.5 Managing License

iXBlue software products are protected by two different means:

• The product uses a file protection if the product has been lent for demonstration

purpose.

• The type of protection is a dongle protection if the product has been purchased.

II.5.1 FILE PROTECTION

The file protection concerns the demonstration version of the software. It offers full access

to all functionalities of the software. The demonstration version is available only for a time

period only that may be extended with the agreement of the manufacturer.

The file protection is based on a license file iXBlue.lic that is given to the customer.

This file should be placed in the DELPH Interpretation folder (default:

C:\IXBLUE\DELPH\DELPH Interpretation).

The extension of a demonstration period is possible with the help of an application

provided with the product. This application is named LicenceEditor.exe. It is located

in DELPH Interpretation folder (default: C:\IXBLUE\DELPH\DELPH Interpretation).

Figure 3 – License Editor Application Logo

If you requested a validity extension, a procedure to apply the validity extension is also

provided.

When an extension has already been made to the original validity period, de-installing and

re-installing DELPH suite will result in the need of the generation of a new activation key

by iXBlue.

Principle

Demonstration Period

Extension



II.5.2 DONGLE PROTECTION

The software protection type in case of a standard customer purchase is made through a

dongle that is physically plugged in the computer. Two kinds of dongle are available:

• USB key dongle

• Parallel key dongle

Figure 4 – USB and Parallel Dongles

Several key dongles can be simultaneously used. Usually one dongle is dedicated for the

acquisition on board the survey vessel and another dongle is used for the interpretation

software onshore. Parallel dongles can be plugged on each other when both software

packages are to be used on the same machine. As well USB and parallel dongles can be

simultaneously used.

At any time you can check if the dongle is operating properly. The application used on this

purpose is called ProtEdit.exe and can be found in the Protection folder

c:\iXBlue\DELPH\Tools\Protection. It can also be run directly from the Start

menu.

If the dongle is present and active, it displays the window shown on Figure 5 (example of

a customer using the DELPH Seismic package).

If your dongle is not available (not plugged or damaged) the Detection indicator turns red.

See Figure 6.

DELPH dongles contain a version number. They enable all DELPH software versions up

to this value. Dongles are upgraded to the latest product version in the frame of the

Extended Maintenance Agreement - EMA.

The procedure to upgrade a physical dongle is supplied in the upgrade delivery

Principle

Dongle Checking

Dongle Versioning



Figure 5 – ProtEdit application with an active Dongle

Figure 6 – ProtEdit application with a not present or damaged Dongle



III MANAGING A PROJECT

III.1 Introduction

A number of preliminary steps are required to ensure that all survey data is stored in a

consistent file structure that can be archived or shared between users later on. A project

database is created and used by all DELPH Interpretation software to establish the

relationships between the raw data files and interpreted information. This mainly concerns

sonar contacts, and sub-bottom data interpretation. As an example, the database contains

all sonar contacts types in use for a project so that a same classification list is proposed

throughout the survey interpretation. As well, this database contains the sub-bottom

reflectors list that is synchronized at any step of the interpretation.

At the first opening of the survey data records, DELPH computes a processed navigation

to eliminate bad positions and interpolates the navigation to assign a position to each

ping. This navigation processing includes the compensation from the sensor geometry

that is defined by the offsets between the sensors in use.

III.2 Project File Structure

All files that are relevant to a survey must be stored in a consistent file structure. It is

composed by a root folder and user-defined sub-folders to store and organize the data.

The project database establishes relations between multiple data files (raw data, contacts,

etc.) and then needs to store the path information of all these files. To preserve these

relations between the files, DELPH stores relative paths that describe the path to follow

from a file to another. In the project database, the data file paths are relative to the

database path, and should subsequently be located in a same folder or in sub-folders.

See example below.

Figure 7 – Project file structure



III.3 Creating or Selecting a Project Database

Interpretation data that is shared among profiles like side-scan sonar contacts and their

classification attributes, measurements, etc. is managed in a relational database. At the

beginning of a work session, check that the proper project database is selected if not

select or create another one. An application named DELPH Database Selector provides

commands to create and select project databases. It also provides a visualization of data

files that are referenced. Please note that a project database uses relative paths to the

data files. Then it is highly recommended to store it at the root of the project file structure.

Figure 8 – DELPH Database Selector icon

Step Action

1. Close all DELPH applications currently running. Launch DELPH Database Selector.

The main window of the application opens.

2. Click on to browse and select or create the database file.

Once selected, the path and filename are displayed in the Database file field. The data

files present in the selected or created database are listed in the array below.

3. In Files tab, click on Refresh to update the list of data files present in the database,

select the data file(s) in the list and click on Suppress if you want to remove them from

the database.

Procedure



Step Action

4. In Project Paths tab, edit the directories of your choice for the whole project:


WHEN REMOVING FILES FROM THE DATABASE, THE RELATIONS BETWEEN PICKED LAYERS AND THE

PROJECT REFLECTOR LIST ARE LOST. THE PICKED HORIZONS ARE RECOVERED WHEN IMPORTING

THE FILES IN THE SAME OR ANOTHER DATABASE. IT IS NECESSARY TO RE-ASSOCIATE THEM WITH

REFLECTORS.



III.4 Using an Geometry File from DELPH Acquisition

The sensor geometry is defined during the acquisition in the DELPH Acquisition software.

DELPH Acquisition keeps track of the sensor geometry configuration in the file named

"DelphSeismic.GEO". This file is stored in the default DELPH data folder

(C:\IXBLUE\DELPH\Data). This file contains all the offsets to integrate when computing

the sensor navigation. This file is opened at the same time as the XTF file in the DELPH

Interpretation software. After processing, a new geometry file is created and stored in the

folder of the corresponding processed XTF files. The geometry parameters are extracted

from the following files which are listed in priority order:

• Geometry file associated to the XTF file

• Geometry file associated to the storage folder of the XTF files

• Geometry file stored in the raw folder /DATA

The geometry files are written in ASCII format using the XML syntax. This structure

contains various entries:

<geometry/> // Geometry file section

<mobile/> // Mobile section (i.e. Vessel)

<equipment name="GPS"> // GPS offset description

<mount/> // GPS mounting type

<offset/> // GPS offsets

</equipment> // End of GPS description

<equipment name="MRU"/> // Motion Reference Unit description

<equipment name="Winch"/> // Winch / Tow point description

<equipment name="Seismic"/> // System description

</mobile> // End of the mobile section

</geometry> // End of the geometry file section

When using DELPH Sonar Interpretation on a same PC as DELPH Acquisition, the

geometry file is shared between both applications.

When using DELPH Interpretation in standalone mode, either the geometry file must be

copied from DELPH Acquisition workstation, or they must be manually edited.

Alternatively, DELPH uses the offsets that can be found in the seismic records, or a

"DelphSeismic.GEO" file that is located in the XTF data folder.

The geometry settings are editable, see section V.3.3.



IV DELPH ROADMAP

Please refer to The DELPH RoadMap User Guide for complete details on generic features

of DELPH RoadMap.

Figure 9 – DELPH RoadMap



V DELPH SEISMIC INTERPRETATION

V.1 Introduction

The processing can be divided in three different categories:

• Temporal

• Spatial

• Detection

Some of these processing tools are available in both real time and replay modes. Some

others are only available in replay mode. See Table 1 for the detail.

Table 1 – List of interpretation processing available

Class Processing Availability in Real

Time mode Availability in Replay

mode

Environmental Processing Sound Velocity Yes Yes

Temporal Processing Filters Yes Yes

Gain Control Yes Yes

Water Column Removal Yes Yes

Signature Deconvolution No Yes

Multiple Removal No Yes

Spatial Processing Stacking Yes Yes

Swell Filter No Yes

Heave Correction Yes Yes

Topo Correction Yes Yes

Detection Processing Bottom Tracking Yes Yes

Reflector Tracking Yes Yes

There is an important difference about the application of the processing parameters

between the real time and the replay modes:

• In the replay mode, you choose the parameters and you click on Process at the

bottom of the Processing window to apply the processing only to the displayed data or

to all the data.

• In the real time mode, the Process button is by default pushed in and it is labeled Stop Processing. The new processing parameters are applied in real time as soon as they

are chosen. When you click on the Stop Processing button, the processing tools are

not applied anymore to the incoming data. You can choose processing parameters but

they are not applied immediately. If you click on Process again, the new processing

parameters are applied to the incoming data. It is also possible to process all the data.

Processing Application



V.1.1 REAL TIME MODE

V.1.1.1 Launch the Real Time Interpretation In real-time mode,

• DELPH Seismic Acquisition acquires the data and stores it in a storage folder

• DELPH Real Time Monitor manages the interpretation and GeoSection building

• DELPH Seismic Interpretation allows the real time processing and interpretation

• DELPH RoadMap displays in real time the ship navigation, the bottom reflectors and

GeoSections

A _PRC extension is added to the original data file name to indicate processed data.

After configuring DELPH Real Time Monitor, the interpretation is launched as the logging

starts in DELPH Seismic Acquisition (See DELPH Seismic Acquisition User’s Manual).

Step Action

1. Launch DELPH Seismic Acquisition. Configure and launch the acquisition. See DELPH

Seismic Acquisition User’s manual for more details on this step.

Do not start data logging at this step of the procedure.

2. Launch DELPH Real Time Monitor.

Launch DELPH RoadMap to visualize the acquisition.

3. Configure the Input and Chart Geodesy in DELPH Real Time Monitor and DELPH

RoadMap. See 0 for more details.

4. Click in front of Monitoring and click in the checkbox that appears.

Monitoring and its parameters turn green.

Procedure



Step Action

5. Click in front of Folder. Click on to browse for the folder where DELPH Seismic

Acquisition stores the data.

Enter a Time Out value (the time with no update in the file and after which the software

considers the file as terminated and looks for another file).

6. Start the logging in DELPH Seismic Acquisition.

The monitoring starts: the file appears in the lower part of the DELPH Real Time Monitor

window with its corresponding storage status.

Note that the Storage and Analyze symbols are active. No active Mapping yet.

7. Click in front of Interpretation and select Enabled.

Interpretation turns green. DELPH Seismic Interpretation window opens with the file

being updated and real time processing is now possible:

8. Under GeoSections, click in the file path in front of Next Parameters and click on the

browse button to open the GeoSection Generator parameters window. See section

VI.3.2 for full details on the parameter selection.

Enable DELPH 3D Viewer to see the GeoSections being built in DELPH RoadMap.



9. Click in front of GeoSections and check Enabled:

or right click on the file at the bottom and select Enable Mapping in the pop-up menu:

GeoSections and its parameters turn green. The Mapping icons become active:

DELPH RoadMap opens and starts to display the data already acquired. DELPH

RoadMap updates in real time the displayed data.




V.1.1.2 Real Time Log

All actions of the DELPH Real Time Monitor are written down in a log. This log is

accessible from the right-most tab of the application. A log example is displayed on Figure

10.

Figure 10 – Access to the Real Time Log



V.1.1.3 DELPH Seismic Interpretation Window in Real Time

DELPH Seismic Interpretation real time window opens when the interpretation is enabled

in DELPH Real Time Monitor. Such a window is shown on Figure 11. The data acquired

slides from the right side, like a horizontal waterfall.

Figure 11 – DELPH Seismic Interpretation Window in Real Time

You have the option to pause the waterfall by clicking on from the standard toolbar in

order to interpret the data already acquired. You can at any time come back to the

waterfall display by clicking again on .

Real time specific settings are available in the Tools > Settings menu. See Figure 12.

You can organize the automatic closing of DELPH Interpretation window when the line is

terminated.

You can set up the update interval and the scrolling step to control the data waterfall.

Figure 12 – Real Time Settings specific to the Interpretation window

Waterfall

Settings



V.1.2 REPLAY MODE

In replay mode, you process data that was previously acquired. You can visualize the

navigation and the digitalized reflectors in DELPH RoadMap (see section IV).

Access to DELPH Seismic Interpretation is possible directly from the Replay Loader

module.

For users who have a valid GeoTools Module License, please refer to the section IV in the

documentation to access all data from DELPH RoadMap software.

Step Action

1. Double click on the DELPH Seismic Interpretation icon in the DELPH folder or from

the shortcut on the desktop.

The Replay Loader window opens.

2. Click on then select one or several seismic data files that you want to process in the Open window that appears. Click on Open.

The selected files appear in the list area of the DELPH Seismic Interpretation – Replay

Loader window.

A green icon at the left of the filename means that the file is already processed (i.e., a

filename_PRC.tra file exists). A red one means that only raw data is available.

3. Select the geodesies as detailed in the section 0.

Procedure



Step Action

4. You have two methods available to access to the seismic data:

Single processing: Select the file(s) that you want to process and click on the

button or double click on the file to access DELPH Seismic Interpretation. Repeat the

operation to as many files as you wish.

A DELPH Seismic Interpretation window opens for each selected file. The file name

appears in the title bar of the window. See section 0.

Batch Processing: Select the file(s) that you want to process and click on the

button to perform a batch processing of all the selected files.

The Batch Processing window opens. See section 0.

5. Select the file(s) that you want to process and click on the button to edit

cable/layback and geometry values to seismic profiles. See section 0.

6. Select the file(s) that you want to process and click on the button to apply vertical

tide and/or static correction to seismic profiles. See section V.6.3.

7. Select the file(s) that you want to process and click on the button to compute and

update the digitized points at the profiles intersection. See section V.6.2.

8. Select the file(s) that you want to process and click on the button to export

interpreted reflectors and thicknesses. See section V.7.1.2.

9. Select the file(s) that you want to process and click on the button to export TIFF

images of the selected files. See section V.7.2.1.

10.

Select the file(s) that you want to process and click on the button to create a

GeoSection from the selected files. See section VI.3.2.

11. Select the file(s) that you want to process and click on the button to generate terrain

models from interpreted reflectors. See section VII.

12. Select the file(s) that you want to process and click on the button to generate some

isopach maps. See section VII.4.


WHEN REMOVING FILES FROM THE DATABASE, THE RELATIONS BETWEEN PICKED LAYERS AND THE

PROJECT REFLECTOR LIST ARE LOST. WHEN YOU IMPORT DATA FILES IN THE SAME OR ANOTHER

DATABASE, THE PICKED HORIZONS ARE RECOVERED AND IT IS NECESSARY TO RE-ASSOCIATE

THEM WITH REFLECTORS.



V.2 Window Components

See a typical layout of the DELPH Seismic Interpretation on Figure 13.

Figure 13 –DELPH Seismic Interpretation main window

V.2.1 WINDOW DESCRIPTION

The DELPH Seismic Interpretation window is composed of various areas. These areas

and their purposes are detailed in Table 2 (a typical layout of the DELPH Seismic

Interpretation is shown on Figure 14).

Table 2 – DELPH Seismic Interpretation panels

Panels Explanation

Processing Panel: it allows you to visualize and/or to set

all the processing parameters using right and left click.

See section 0 for details on the window.

Process button: choose between Process All or Process Visible Data if you want to apply the processing only to the

displayed data or to all the profile data.

Profile Area: it displays the seismic profile at user-

selected scale in real time during acquisition or in replay

mode. It also displays the interpretation, annotations and

crossings … see Interpretation panel.

Multi windows

display



Interpretation Panel: it allows you to manually or

automatically track the reflectors and/or sea bottom, it also

allows graphical layers (excluded areas, crossings,

annotations and imagery) to be hidden or displayed.

See section V.6 for details on the window.

Local Information Panel: it displays the geographical

coordinates, the heading and speed, the date and time, the

ping number, kilometer point, fix number, recording length

and delay, sampling frequency, chirp min and max

frequencies, chirp length and level, static and tide

corrections from the current trace on which is located the

mouse cursor.

Spectrum Panel: It displays the frequency spectrum of the

signal from the trace that is pointed by the mouse cursor.

Check these options in the Tools > Settings menu.

Title Bar: displays the name of the current database



V.2.2 SIDE WINDOWS

The four Processing, Interpretation, Local Information and Spectrum side windows

can be displayed as separate windows by double clicking on their title bars. This

maximizes the size of the displayed data to dock the windows back inside the main

window.

Slide the side windows over the main window in order to dock them back inside the main

window. A series of icons appear on each side of the main window. Select the icon of

your choice to choose the side where you want to dock the secondary window.

Figure 14 – Example of side windows away from DELPH Seismic Interpretation main window

Dock back



V.2.3 MENU AND TOOL BARS

A menu and toolbars are available in DELPH Seismic Interpretation as in Figure 15.

Menu Bar

Standard (Replay mode)

Standard (Real Time)

Color Palette

Interpretation

Annotation

Text

Figure 15 - Menu bars and Toolbar Buttons

The Standard and Standard Real Time toolbars (see details in Table 3 and Table 4)

allow you to customize the display, print (only in replay mode), zoom in/out, move

through the display, measure the displayed data/area, reverse the profile (only in replay mode), switch from scrolling mode to static mode (only in real time mode).

The Color Palette toolbar (see details in Table 5) allows you to display positive, negative

or both parts of the data, customize the color main scheme, apply a distribution law and

reverse the color map.

The Interpretation toolbar (see details in Table 6) allows you to, digitize reflectors and

bottom, edit the bottom, manage the crossings between profiles.

The Annotation toolbar gathers the tools to draw graphical objects. See Table 7.

The Text Format toolbar gathers the tools to edit text displayed on the data. See Table 8.

The tool bars can be undocked from the main window. They can also be docked vertically

on the left or right side of the main window.

All the tools present in the toolbars can be found as well in the menus.

The following six tables display the purpose of every menu option and toolbar button.



Table 3 - DELPH Seismic Interpretation - Menu Bar

Menu Explanation

File

Export: to export interpretation as a .csv file, an image as a .tif, a

selected reflector in a .html, thickness in .csv or .htm file.

Import: to import of processing parameters and ground truthing.

Page layout…: to add logo and title to the print (replay mode only).

Print Setup…: to choose printing parameters (replay mode only)

Print…: to launch the printing. See section 0 for more details (replay

mode only).

Print Preview: to check the page before printing (replay mode only).

Close: to close the current window.

Display Menu, Toolbars, Panels, Scales: to display or hide these window

elements.

Reverse Profile: to perform a horizontal symmetry of the profile.

Real Time Scrolling: to switch from waterfall to static display.

Horizontal Scale, Vertical Scale, Default aspect ratio: to zoom in or

out.

View All: to adjust the zoom factor to view the entire profile in display

area.

Tools Mode: to switch between pointer, navigation, zoom, measurement, edit

interpretation modes and the exclusion modes.

Fragment: to create, delete, and to move to the next or previous

fragment of the selected reflector or bottom.

Import water depth: copies water-depth data to the bottom reflector

Snapshot: to take print screens of the data being logged.

Compute Crossings: update this profile and its crossing profiles.

Update all Crossings: for all profiles in the database.

Static/tide post-processing: to apply static offset and/or a tide data on

the current profile in order to align all profiles and interpretation to a

same vertical reference.

Layback & Geometry post-processing edit layback and sensor

geometry parameters

Save swell offset to trace headers: To write the swell correction

information to the processed file trace headers.

Reset swell offsets in trace headers: to set the swell offset to zero.

Settings: to adjust general application settings (grids, real-time,

spectrum, snapshot, data units).

Help About DELPH Seismic Interpretation: Get the version number of the

DELPH Seismic Interpretation application



Table 4 - DELPH Seismic Interpretation - Standard Toolbar

Button Explanation

Hide/Show Processing window: to hide or to show the Processing window by default

located on the left of the screen.

Hide/Show Interpretation window: to hide or to show the Interpretation window by

default located on the right of the screen.

Print: to open the printer dialog window. (Replay mode only).

Selecting File ►Print… from the menu bar provides the same result.

Print Preview: to display the page that will be printed. (Replay mode only).

Selecting File ►Print Preview from the menu bar provides the same result.

Resize to full view: to adjust the zoom factor to view the entire profile. Selecting Display ►View All provides the same result

Unzoom horizontal scale: to horizontally compress the view displayed in the Profile area.

Selecting Display ►Horizontal Scale ► Unzoom in the menu bar provides the same

result.

Zoom horizontal scale: to horizontally expand the view displayed in the Profile area.

Selecting Display ►Horizontal Scale ► Zoom in the menu bar provides the same result.

Unzoom vertical scale: to vertically compress the view displayed in the Profile area.

Selecting Display ►Vertical Scale ► Unzoom in the menu bar provides the same result.

Zoom vertical scale: to vertically expand the view displayed in the Profile area.

Selecting Display ►Horizontal Scale ► Zoom in the menu bar provides the same result.

Unselect current active tool.

Shift the view: to move the imagery up, down, left or right. Left-click and drag the mouse

in the direction you want.

Zoom on a selected area: to zoom on a selected area of interest in the profile. A right

click zooms out. A left click zooms in.

Measure Distance Between Two Points: to get measurements. Select the first point by

a left click and while holding down the left mouse button drag to the second point, the

distance is displayed in the Measurement display area (see in Table 2).

Reverse Profile: to reverse horizontally the profile. (Replay mode only).

Selecting Display ► Reverse Profile in the menu bar provides the same result.

Real time scrolling: to switch from scrolling mode to static mode allowing the

interpretation of the displayed data. (Real time mode only).

Snapshot: To save the view content to an image file.



Table 5 - DELPH Seismic Interpretation- Color Palette Toolbar

Option Explanation

Sign: to choose to display the positive, negative or both parts of the signal

Type: to choose the type of color main scheme

Repartition: to choose the repartition model to map colors on the intensity

of the signal

Inverse the color palette.

Preview the color palette.

Table 6 - DELPH Seismic Interpretation - Interpretation Toolbar

Button Explanation

Edit Interpretation: to switch to Edit mode.

New fragment: to terminate the last segment being edited and create a new fragment

Remove fragment: to remove last fragment being edited.

Copy Sensor Depth: to replace edited bottom data by bottom data from sensor.

Previous Fragment: to select previous fragment.

Next Fragment: to select next fragment.

Update Crossings: to compute new crossings from digitized reflectors.

Pings Exclusion: Exclude data by pings from the GeoSection building.

Ranges Exclusion: Exclude data by range from the GeoSection building.

Realtime Ranges Exclusion: Exclude data in real time scrolling display.



Table 7 – DELPH Seismic Interpretation – Annotation Toolbar

Button Explanation

Selection: To select of graphical objects.

Segment: To draw Segments.

Polyline: To draw Polylines.

Polygon: To draw Polygons.

Rectangle: To draw Rectangles.

Ellipse: To draw Ellipses.

Symbol: To include symbols over the data.

Image: To insert images over the data.

Fill Color: To fill closed object with a color.

Pen Color: To change the color of the pen.

Text Color: To change the color of the text.

Table 8 – DELPH Seismic Interpretation – Text Format Toolbar

Button Explanation

Font: To change the font of the text.

Size: To change the size of the text.

Bold: To set the text style to bold.

Italic: To set the text style to italic.

Underlined: To set the text style to underlined.

Outline: To set the text style to outline.

Text Left: To set the text aligned on the left.

Text Center: To set the text centered.

Text Right: To set the text aligned on the right.



V.2.4 USING THE KEYPAD AND THE MOUSE

These hints are mainly designed to help the bottom digitalization.

Arrow Keys

• The arrow keys have the following functions

• Right arrow: it moves the profile horizontally towards the increasing distances

• Left arrow: it moves the profile horizontally towards the decreasing distances

• Up arrow: it moves the profile vertically towards the decreasing times

• Down arrow: it moves the profile vertically towards the increasing times

[Shift]: If you press the [Shift] key at the same time as the arrows scrolls the whole

page up and down.

[+] and [-] Keys

• [+] key is a shortcut key to zoom in

• [-] key is a shortcut key to zoom out

Page Up and Page Down Keys

• [Page Up] key is a shortcut key to scroll the image vertically towards the increasing

distances by 80% of the image size

• [Page Down] key is a shortcut key to scroll the image vertically towards the

decreasing distances by 80% of the image size

[F] Keys for Processing Launch

• [F5] key is a shortcut key to launch the processing

• [F6] key is a shortcut key to select the processing for the visible data or all data

Wheel Mouse

You can also use the wheel mouse button (if any) to move vertically the seismic profile.

• The [Del] key deletes the selected fragment

• The [Backspace] key deletes the rightmost point digitized

• The [Esc] key pauses the automatic tracking

• The [F9] key takes a print screen, snapshot tool

V.2.5 DISPLAYED UNITS

You can select the unit that the data is displayed in. You can display the

• Positions in the input or output geodesy, in the geographic or projected mode and in

various numeric formats

• Range in various distance units or traveled time with a specific precision

• Geographic Distance in various distance units with a specific precision

• Processing Distance in various distance units with a specific precision

• KP Kilometer Point with a specific precision

• Processing Travel Time in various distance units with a specific precision

• Travel Time in various time units with a specific precision

• Altitude / Depth in various distance units with a specific precision



• Angle in degrees or radians with a specific precision

• Frequency in Hertz or Kilohertz with a specific precision

• Celerity in meter/second with a specific precision

• Speed in m/s, km/h and knots with a specific precision

See in Appendix 0 the conversion values between units.

Procedure

Step Action

1. Select Settings in the Tools menu.

The Settings window opens.

2. For each item under Values Display Preferences left click on the options to edit them.




V.2.6 PROCESSING WINDOW DESCRIPTION AND HANDLING

Three types of processing are proposed in the Processing window:

• Environmental Processing see section V.5.3

• Temporal Processing see section V.5.4

• Spatial Processing see section V.5.5

• Detection Processing see section V.5.6

Figure 16 – Processing Window



V.2.7 INTERPRETATION WINDOW

The Interpretation window (see Figure 17) is used in conjunction with the interpretation

toolbar (detailed in Table 6) to define and draw:

• The bottom and the filtered bottom (see section V.5.6.1)

• The Reflectors (see section V.5.6.2)

It is used manually or with the auto-tracking mode when the relevant selection is activated

in the Processing window. The drawing can be made fragment by fragment (useful in case

of rock outcrop) or with only one fragment on the entire layer.

Right click on the bottom name, on Reflector, and on the reflector name to open the

corresponding pop-up menus. See Figure 17.

Figure 17 – Interpretation window and related parameters, toolbar and pop-up menus



V.2.8 CUSTOMIZING THE DISPLAY

You can customize the appearance of the grid in the display area of the main window. You

can edit the color and the length of the steps of the displayed grid.

Step Action

1. Select Tools ► Settings. The Settings window opens.

2. Expand the Scales item.

3. Click on Range to select it and on the check box to make it visible or not. Edit the Text Color, Line Color and Grid settings.

4. Click on Distance to select it and on the check box to make it visible or not. Edit the

Text Color, Line Color, type of Information, Grid settings and set active the type(s) of

Annotations.

5. Expand the Snapshot item, edit the Magnification, Format type and Storage Folder. See the Snapshot exportation settings in section V.7.2.2.

6. Expand the Spectrum item, edit the Origin and Color.


Procedure



V.3 Correcting from the Layback and System Geometry

You can edit the layback in replay mode. You have access to the layback edition window

from DELPH RoadMap, the replay loader and from the interpretation window. One or

several files can be edited simultaneously from the replay loader or from DELPH

RoadMap. Only the current file can be edited from the interpretation window.

The raw layback data is loaded at the opening of the layback window. The first time, it can

take some time for large files because all layback values for all pings are scanned in the

file. The raw layback is copied and you can edit the copy. The two layback datasets are

displayed in the layback window. See in Figure 18 the raw layback and the tab for the

Used layback that you can edit.

Figure 18 – Layback editing window

This button set all Used layback value to zero.

This button copies the raw layback data into the Used layback. No change is made to the

raw data records.

Access

Loading

Reset Used

Copy File(s) Layback



V.3.1 EDITING THE LAYBACK

Adding a Layback

Step Action

1. In DELPH Seismic Interpretation, select the menu Tools > Layback and Geometry Post-Processing or in DELPH RoadMap right click on the Data Files title or directly on

the data file name from which you want to edit the layback and select Layback & Geometry Post-Processing… to open the Layback window.

In the Replay Loader, Click on to open the Layback window.

The Layback Window open:



Step Action

2. Right click in the list to open a pop-up menu and select New Layback.

3. You have two ways to insert a layback value:

• Click in the File radio button and in the scrolling list to select the name of the file in

which you want to add a layback value and specify the Ping Number after which the

layback is applied

• Click in the Date radio button and in front of Date and Time to select at which date

and time you want to add a layback value

4. Click in one radio button to select the value type between Layback and Cable Length.

The layback value is compensated from the available sensor depth when specifying a

cable length.

5. Type in Value the new layback or cable length value.

6. Click OK to close the window.

The new value is inserted in the list of the Layback window.




Removing a Layback

Step Action

1. Select the layback value(s) that you want to remove from the list.

2. Right click on the selected layback value(s) and select Delete Layback(s).

The value(s) are removed from the list.


You cannot remove the first line in the list corresponding to the first layback value.

Editing in the List

Step Action

1. Click in the field Value that you want to edit.

2. Type in the new value and hit the [Enter] key.




V.3.2 EDITING THE GEOMETRY OFFSETS

You may configure several offsets to the layback that you are applying on the data. These

offsets are:

GPS: X (m), Y (m), Z (m), Yaw (°) and Latency (ms)

MRU: X (m), Y (m), Z (m), Roll (°), Pitch (°) and Yaw (°)

Winch: X (m), Y (m), Z (m)

Source (Hull Mounted) X (m), Y (m), Z (m)

Receiver (Hull Mounted) X (m), Y (m), Z (m)

Step Action

1. Open the Geometry tab.

2. Click on the values that you want to edit and type in the values to be applied. A reminder

of geometry sign conventions displays a tooltip when hovering the column headers with

the mouse.

3. For a Source, click on the Configuration column and select the sonar configuration

(Towed or Hull Mounted).

In the Hull Mounted case, you may enter new values for X (m), Y (m) and Z (m).

4. For a Receiver, click on the Configuration column and select the sonar configuration

(Towed or Hull Mounted).

In the Hull Mounted case, you may enter new values for X (m), Y (m) and Z (m).




V.3.3 STARTING THE PROCESS

Step Action

1. Click on the bottom check box if you want the window to be closed at the end of the

processing.

2. Once you have edited the layback, you can apply it to the current file(s). Click on Start.

The progress bar shows the processing status. The Start button is changed in a Stop

button.

3. You can stop the process at any time by clicking on the Stop button.

You are warned that interrupting the process can corrupt the file navigation.


Procedure



V.4 Defining Geodetic Settings

The first step you have to go through when using DELPH Interpretation in real time and

replay modes is to select the geodesy of the input data and of the final geographic map.

• The geodesy of the input data is the geographic coordinate system in which the data

is referenced (it can be a projected coordinate system).

• The geodesy of the chart is the projection to apply to the geographic data to represent

this data on a flat surface.

After the first definition of the geodesy information associated to some data files, the

geodesy information is stored into a .prj projection file. When a data file is loaded with

an existing geodesy projection file, a choice has to be made between the current geodesy

settings of the project and the geodesy settings of the file to be uploaded.

The menu that opens Select Geodesy window is available at different places if you are in

real time mode or in replay mode from the Replay Loader and from DELPH RoadMap.

Figure 19 – Geodesy choice window

The menu that opens Select Geodesy window is available at different places if you are in

real time mode or in replay mode from the Replay Loader and from DELPH RoadMap.

Definition

Projection file

Geodesy Menu

Geodesy Menu



V.4.1 GEODESY MENU IN REAL TIME MODE

The geodesy selection in real time mode is made from the DELPH Realtime Monitor. The

main window of the DELPH Realtime Monitor is displayed on Figure 20.

Figure 20 – DELPH Realtime Monitor Main Window

Step Action

1. Open DELPH Realtime Monitor.

2. Click on Input Geodesy and on the browse button.

The geodesy menu opens.

3. Click on Chart Geodesy on the browse button.



Procedure



V.4.2 GEODESY MENU IN REPLAY MODE

The geodesy selection in replay mode is achieved in the Replay Loader and in DELPH

RoadMap. The main window of the Replay Loader is displayed.

Figure 21 – Replay Loader Main Window

Replay Loader

Step Action

1. Launch DELPH Sonar Interpretation.

The Replay Loader window opens.

2. Left click on the browse button in front of Input Geodesy.


3. Left click on the browse button in front of Chart Geodesy.





DELPH RoadMap

Step Action

1. Launch DELPH RoadMap.

2. Open the File menu and select Project Properties. A window opens where you can choose the geodesy.



Step Action

3. Click on the browse button in front of Map.


4. Click on the browse button in front of Input.





V.4.3 GEODESY SELECTION From the geodesy menu two options are proposed:

• To select one of the five last geodesies that have been selected before

• To click on Select… to open the Select a geodesy window (see Figure 22)

Figure 22 – Select Geodesy Window

In the Select a geodesy window two tabs are available: Library and My Geodesies

The left side of the window shows a list of coordinate systems. This list is divided in

Geographic Coordinate Systems and Projected Coordinate System.

Figure 23 – List of Coordinates Systems

The input data arrives under a certain geographic or projected coordinate system and are

projected on a geographic map following a projected coordinate system. Therefore the

software needs to know in which geographic or projected coordinate system the data

arrive and in which projected coordinate system they are going to be projected to create a

map.

When you select a coordinate system in the list on the left, the details of the selected

coordinate system appear on the right side of the window (see Figure 9).

Library



In this tab you can customize a geodesy, he chooses between a few geodesy syntaxes.

• PROJ 4.: open source USGS Cartographic Projections library. More information on

http://www.remotesensing.org/proj/

• EPSG Code: European Petroleum Survey Group has gathered a series of codes

corresponding to projection systems. More information on http://www.epsg.org/

• ESRI: GIS Software Company that has its own library of spatial reference systems

• WKT: Well Known Text is a language similar to XML for describing transformations

between spatial reference systems. They are regulated by the Open Geospatial

Consortium. http://geoapi.sourceforge.net/2.0/javadoc/org/opengis/referencing/doc-

files/WKT.html

Step Action

1. Right click in the left side display area and select New in the pop up menu that opens.

A New Geodesy appears in the list. Defaults values appear in the right of the window.

2. Enter a new Label for the geodesy that you are customizing.

3. Select a type of Syntax in the associated scrolling list.

A Value field is added below Syntax.

4. If you have selected PROJ 4. then edit the associated Value.

5. If you have selected EPSG Code, enter a code in the Value field.

My Geodesies

Procedure


http://www.remotesensing.org/proj/

http://www.epsg.org/

http://geoapi.sourceforge.net/2.0/javadoc/org/opengis/referencing/doc-files/WKT.html

http://geoapi.sourceforge.net/2.0/javadoc/org/opengis/referencing/doc-files/WKT.html


Step Action

6. If you have selected ESRI, click on the Pick from File… button, select the file containing

the corresponding value. The data is automatically pasted in the Value field.

7. If you have selected WKT, edit the full Detail area.

8. Click on Save edit.

9. Click OK to exit the window.




V.5 Processing Data

In this section, are described all the processing tasks that can be applied on seismic data

with DELPH Seismic Interpretation. These tasks are accessible from the Processing dock

side window of the DELPH Seismic Interpretation main window (see Figure 13) and from

the Batch Processing window (see Figure 24).

Figure 24 – Batch Processing window

V.5.1 EXPORTING AND IMPORTING PROCESSING PARAMETERS

The processing parameters can be saved in an XML format file (File > Export > Processing Parameters… menu). Saved processing parameters can be as well loaded

in DELPH Seismic Interpretation (File > Import > Processing Parameters… menu).

V.5.2 MULTICHANNEL SEISMIC DATA You can select a specific channel from multichannel seismic data from the Processing

window. Click in the Channel Number and select the channel to be displayed in the

corresponding scrolling list. See Figure 25

Figure 25 – Selecting a channel from multichannel seismic data



V.5.3 CHOOSING SOUND VELOCITY DATA

A choice is offered between using the raw sound velocity data already present in the

seismic data and to add an user defined sound velocity data to be applied instead of the

raw sound velocity data.

Step Action

1. In the Project View, under Environmental Processing, click twice besides Sound Velocity in order to expand the scrolling list:

2. Select the mode of your choice. If you choose User Defined, enter the sound speed that

you want to be applied to the data during the processing. Choosing raw data means

using the recorded sound velocity value or default 1500 m/s.


V.5.4 PROCESSING TEMPORAL DATA

V.5.4.1 Chirp Parameters

This processing is only available for raw chirp records. You can choose to display

one of the following data:

• I: it is the In-Phase signal, correlation of the input signal by the original chirp

• Q: it is the Quadrature signal, In-phase signal shifted from pi/2

• Envelop: the envelop of the signal

• Phase: the phase of the signal

Figure 26 – Envelop (left) and In-phase (right) signals

Procedure



An option is given to weight the chirp used on the return signal. This weight window is a

Hanning Taper window. A coefficient is available between 0 (no weight) and 1. Hanning

Taper aims at reducing secondary lobes from the signal correlation. A larger Hanning

Taper will have a negative impact on vertical resolution.

Step Action

1. Expand the Chirp tree item.

2. Type in the Hanning Taper window coefficient between 0 and 1.

3. Right click on one of the item below Chirp.

The item is selected and set up in the title.

4. Click on Process to apply the changes.


V.5.4.2 High and Low Pass Filtering

A pre-defined list based on raw data sampling frequency is available. Still it is possible to

specify a particular frequency value within the range:

High Pass Filter: 1 % to 30 % of the sampling frequency

Low Pass Filter: 15 % to 40 % of the sampling frequency

The high-pass filter makes possible to attenuate the spectral components of the signal

below the cut off frequency selected.

The Low-pass filter makes possible to attenuate the spectral components of the signal

above the cut off frequency selected. The combination of these two filters forms a band

pass filter with a band-pass at –3 dB between the cut-off frequency of the high-pass filter

and the low-pass filter. These are class 6 Butterworth filters. Typically this band pass filter

will be selected to cover the range of frequencies generated by the seismic source you are

using.

It is a Time varying Filter (TVF). This function allows a band-pass filter with characteristics

varying over time. This filter is constructed from class 6 Infinite Impulse Response (IIR)

filters (Chebychev type 2). The band-pass filter is applied to the signal between the start

recording and the end of the recording time. The TVF is applied from the beginning of your

recording. The filter characteristics evolve linearly between the start recording and the end

of variation time and remain constant up to the end of the recording time (see Figure 27).

Procedure

High-Pass Filter

Low-Pass Filter

Advanced



T I ME

FREQUENCY

Start of recording

End of variation

End of recording

Start low cut-off frequency

Start high cut-off frequency

End low cut-off frequency

End high cut-off frequency

Low cut High cut Band-pass

Figure 27 – Time Varying Frequency filter

• Start Band-Pass: these are the high and low band-pass cut off frequencies. They

define the initial characteristics of the seabed position filter.

• End Band-Pass: these are the high and low band-pass cut off frequencies. They

define the characteristics of the filter at the end of variation time.

• End of Variation: this parameter defines the time (in millisecond) after which the filter

will no longer vary.

High Pass Filter

Step Action

1. In the Processing Window, expand the Temporal Processing and then the Filter label area and select the High/Low Filter in the Method scrolling list.

2. Expand High Pass folder and select or edit the desired cut off frequency.

The values proposed depend of the sampling frequency of the acquisition.

Parameters



Step Action

3. Click in the check box of the Filter label to activate the filter.

The Filter label and all its parameters turn green.

4. To apply the filter, click on Process button.

Some noise in the raw data disappears because the spectral components of the signal

below the cut off frequency selected are attenuated.




Low Pass Filter

Step Action

1. In the Processing Window, expand the Temporal Processing and then the Filter label area and select the High/Low Filter in the Method scrolling list.

2. Expand Low Pass folder and select or edit the desired cut off frequency.




Some noise in the raw data disappears because the spectral components of the signal

above the cut off frequency selected are attenuated.




Time Varying Filter

Step Action

1. In the Processing Window, expand the Temporal Processing and then the Filter label area and select the TVF in the Method scrolling list.

2. Expand Start Band Pass label and select or edit the High Frequency and Low Frequency in the corresponding scrolling lists.

3. Expand End Band Pass label and select or edit the High Frequency, Low Frequency

in the corresponding scrolling lists. Enter the End of Variation value in the text field.




Some noise in the raw data disappears.




V.5.4.3 Gain Control

This option offers improved visualization of the seismic signals. The principle is to

compensate the variations in the signal envelope by different functions:

• Time Varying Gain (TVG)

• Automatic Gain Control (AGC) decremental

• AGC linear

• AGC exponential

• AGC Power

With the AGC the data within a specified time window is gained to a constant energy level.

The window is slid down the trace so the energy is equilibrated. Shorter windows boost

everything while longer windows tend to show true relative amplitudes.

AGC and TVG variants both employ a fixed window length. The trace is divided into

consecutive windows of equal length (a trace consists of the samples collected during one

shot). The envelope is the set of maximum values found for each window.

The window length determines the increment for envelope sampling, and subsequently

the gain correction function. It is assumed that this function will not vary significantly over

a time period shorter than that of the source signature (at the risk of introducing major

distortion of the signal), and it is not advisable to select a window the length of which is

less than the signature length.

The AGCs have a signal-dependent gain correction curve. This signal-dependent gain

correction curve contrasts with the time-variable gain for which the gain correction curve is

exclusively time-dependent.

This function applies a gain correction curve that varies linearly as a function of time between the Start Gain and the End Gain of the trace.

This type of AGC is designed to conserve quantitative information on the relative power of

the reflectors while limiting the signal dynamics. It is assumed that the signal amplitude is

strictly decreasing over time. If the condition is not respected, the processing will not give

correct results.

This form is determined as follows: A secondary envelope is calculated by interpolation

between the extremes of the initial signal envelope, while limiting the search for each

extreme to a range between the preceding extreme and the end of the trace. The

correction curve is inversely proportional to this secondary envelope.

Parameter:

Window: it is the window length used to calculate the signal envelope.

This gain method does not yield good results in the presence of multiple echoes of the sea

floor, or of a surface echo generated by deep sources such as “Deep tow”. The

assumption of increasing signal attenuation over time is not valid for those cases.

Gain Control Principles

TVG Parameters

AGC Decremental



These two types of AGC are governed by similar principles. For either type, a rough gain

correction curve is calculated first from the trace envelope, then the final correction curve

is deduced by limitation of the variations of the rough curve. These limitations apply either

to the difference (linear adaptation) or to the quotient (exponential adaptation) of two

consecutive values taken from the rough correction curve function.

The essential difference between both types is that the linear case is more limiting than

the exponential one for large gains whereas exponential is more limiting for small gains.

AGC linear Parameters:

• Window: it is the window length used to calculate the signal envelope.

• Strength: it is a value (in %) used to locally limit the gain curve slope. Large strength

values allow quick variation of the gain curve. Default value is 10%.

AGC Exponential Parameters:




The seismic signal is analyzed on a window centered on each sample. For each sample

the gain value in each window is an inverse multiple of the total power in the window.

AGC Power Parameters:




Step Action

1. In the Processing Window, expand the Temporal Processing and Gain Control labels.

2. Select the AGC Method that you want to apply in the scrolling list.

3. Expand the AGC label, enter a value of Window in ms and of Strength if present and

each time press [Enter] to validate the entered value.

AGC Linear and

Exponential

AGC Power

Apply AGC



Step Action

4. Click in the check box of the AGC label to activate the gain control.

The AGC label and all its parameters turn green.

5. Click on Process button to apply the gain control.


Step Action

1. In the Processing Window, expand the Temporal Processing and Gain Control

labels.

2. Expand the TVG label and enter a value for the Start Gain and for the End Gain. Click

on [Enter] to validate the entered values.

3. Click in the check box of the TVG label to activate the gain control.

The TVG label and all its parameters turn green.

4. Click on Process button to apply the gain control


Apply TVG



V.5.4.4 Removing the Water Column

The water column removal tool allows you to get rid of the data collected in the water

column by the sound waves. The parameters of this tool are:

• Duration From Start: defines the fixed amount of data to remove from the trace start

(example: for removing direct paths and surface reflections)

• Use Picked Seabed: Once the seabed has been digitized, this option is used to

remove all data above it.

• Offset to Seabed: defines a vertical offset to preserve a data margin above seabed.

Figure 28 – Example of Water Column Removal

Step Action

1. In the Processing Window, expand the Temporal Processing and Water Column Removal labels.

2. Enter a Duration from Start time value.

3. Select the Use Picked Seabed option by clicking on the check box and enter a Offset to Seabed value.

4. Click in the check box of the Water Column Removal label to activate it.

The Water Column Removal label and all its parameters turn green.

5. Click on Process button to apply the gain control


Procedure



V.5.4.5 Deconvoluting a Signature

This tool is only available in replay mode.

The signature deconvolution function can improve the quality of seismic images by:

• Increasing the vertical resolution of the data

• Stabilizing the signature from one trace to another

Because the signature deconvolution uses the bottom echo to estimate the source

signature, you first need to digitize the seafloor (see section V.5.6). The signature

deconvolution function first calculates then applies a Finite Impulse Response (FIR) filter.

The parameters of the Signature Deconvolution are:

• Signature to Seabed: time between the start of the signature and the seabed

detection (can be positive or negative)

• Signature Length: the length of the signature in milliseconds

• Noise Level: value between 0 and 100. The operator estimates the noise present in

the signal

Figure 29 – Signature to Seabed and Signature Length Parameters



Step Action

1. In the Processing Window, expand the Temporal Processing and Signature Deconvolution labels.

2. Type the values of Signature to Seabed, Signature Length and Noise Level in the

corresponding text fields.

3. Click in the check box of the Signature Deconvolution label to activate it.

The Signature Deconvolution label and all its parameters turn green.

4. Click on Process button to apply the Signature Deconvolution.


Procedure



V.5.4.6 Removing Multiple


This function attenuates multiple echoes from the seabed. See Figure 29. This is called

predictive deconvolution. It requires the digitalization of the bottom (see section V.6).

The attenuation of seabed multiple is obtained by subtracting from digitized signal the

multiples predicted by using a predictive deconvolution algorithm. This processing

capability is applied independently to each trace and involves only seabed multiples

(multiples due to internal reflection are not processed).

• Signature to Seabed: beginning time of the seabed signature.

• Signature Length: the length of the signature in milliseconds. This parameter can be

easily measured in the Profile area. The signature length depends upon the seismic

source being used.

• Search Window: is the length in milliseconds of the processing window. This

parameter must be determined by successive approximations during processing. The

initial value entered allows only a rough setting that must be fine-tuned. This parameter

depends on filtering characteristics and on the geological structure of the terrain. Its

value must be situated between three sampling periods and half of the recording

length. The default value is equal to the minimum value.

• Filter Order: it defines the number of filter coefficients. The higher this number is, the

stronger the deconvolution. The values are limited to the [3,9] interval. The default is 3.

In practice, the minimum value is generally satisfactory, but if your data exhibits a very

low signal-to-noise ratio, it may be useful to increase this value (the calculation time is

then longer).

Parameters



Step Action

1. In the Processing Window, expand the Temporal Processing and Signature Deconvolution labels.

2. Type the values of Signature to Seabed, Signature Length, Search Window and

Filter Order in the corresponding text fields.

3. Click in the check box of the Multiple Removal label to activate it.

The Multiple Removal label and all its parameters turn green.

4. Click on Process button, to apply the Multiple Removal.


Procedure



V.5.5 PROCESSING SPATIAL DATA

V.5.5.1 Horizontal Stacking

Stacking is a processing feature that improves the signal-to-noise ratio. Each trace is

replaced by a trace that is the linear average of the neighboring traces.

Stack depth: it is the number of successive traces to use for the linear average. It

depends on the substratum. If this substratum structure is complex, the number of shots

should be small to avoid excessive loss of resolution. The stack depth must be between 1

and 10.

Step Action

1. In the Processing Window, expand the Spatial Processing and Stacking labels.

2. Type the value of Stack Depth in the corresponding text field.

3. Click in the check box of the Trace Stacking label to activate it.

The Trace Stacking label and its parameter turn green.

4. To apply the Stacking, click on Process button.


Parameter

Procedure



V.5.5.2 Filtering the Swell

THE BOTTOM MUST HAVE BEEN DIGITIZED BEFORE APPLYING A SWELL FILTER


This function attenuates the up-and-down movement of the sea.

Swell period: the swell wave number can be determined on the raw data.

Procedure

Step Action

1. In the Processing Window, expand the Spatial Processing and Swell Filter labels.

2. Enter the value of the Swell Period in the corresponding field.

3. Click in the check box of the Swell Filter label to activate it.

The Swell Filter label and all its parameters turn green.

The processing begins immediately.


When the swell filter is applied, the period parameter can be edited and the processing is

immediately performed.

Parameter



V.5.5.3 Correcting the Heave

This function compensates for the heave sensor data.

Invert heave data: this option allows compensating for the inverse heave data.

The Heave sign convention is Positive Upward.

Procedure Step Action

1. In the Processing Window, expand the Spatial Processing and Heave Correction

labels.

2. Click on the check box of Invert Heave Data to activate this option.

3. Click in the check box of the Heave Correction label to activate it.

The Heave Correction label and all its parameters turn green.

The processing begins immediately.


This tool is available for XTF files that contain MRU heave data. Geometry must have

been defined for this file.

V.5.5.4 Correcting Topography from the Sensor Depth

The Topo correction consists in vertically correcting the data from the immersion of the

seismic source. When the seismic source is towed and pressure sensor data is collected

from the tow fish, it is possible to use that data to vertically compensate the sensor

navigation and restore the seabed topography. Data correction must be done after topo

correction is applied and data shifts down to a true depth.


1. In the Processing Window, expand the Spatial Processing.

2. Click on Topo Correction to activate the correction.

The processing starts immediately.


The interpretation must be done after the correction.



V.5.6 DETECTING THE BOTTOM AND THE REFLECTORS

The bottom and the reflectors can be detected manually and with the auto-tracking tool.

The auto-tracking tool is based on two methods: image and signal processing.

The auto tracking method is based on an image processing technique used in simple

pattern recognition. For the reflector/bottom tracking method, the reflector/bottom is

modeled with line segment. It is a trial-and-error method: from an initial point, the best (at

a statistical point of view) line segment (meter, time) is computed then the next point is

determined. This new point is used as initial point for the next computation and so on.

Depending on the gain correction and the noise in the data you may need to tune the

horizontal and vertical sensibility.

The second method is directly based on the signal. The bottom is detected with the help of

a vertical detection window.

V.5.6.1 Tracking the Bottom

The bottom auto-tracking is a very useful tool allowing the automatic digitalization of the

bottom in a seismic profile. You only have to initiate the digitalization and the auto tracking

follows the bottom until its end or until the end of the profile. It is working very efficiently in

situations where the bottom appears distinctively in the seismic profile.

Once activated, the bottom-tracking mode and manual is used in the Interpretation area.

• In the Image method, you have to define the size (vertical and horizontal) of the

detection window and the threshold level.

• In the Signal method, you have only to define the vertical detection window.

This section describes how to set up the parameters, see section V.6 for the application of

these parameters.

These parameters must be set up:

• Vertical Detection Window: corresponds to the length (in time) of the detection

window to use.

• Horizontal Detection Window: corresponds to the number of pings of the detection

window to use.

• Threshold level: it gives the detection threshold of the points to take into account for

the process. The calculation uses all the points the values of which overpass this

threshold multiplied by the maximum signal value. Default value is 15 %. Higher this

threshold is and more accurate the bottom is tracked but the tracking may stop more

often.

Swell detection must be de-activated before using bottom tracking.

Image Processing

Signal Processing

Parameters



Step Action

1. In the Processing window, expand Detection Processing and the Bottom Tracking

label.

2. Select the detection method in the Based scrolling list.

3. If you use the Image method, enter a value for the Vertical Detection, Horizontal Detection and the Threshold Level in the corresponding text fields.

4. If you use the Signal method, enter a value for the Vertical Detection in the

corresponding text field.

5. Click in the check box of the Bottom Tracking label to activate it.

The Bottom Tracking label and all its parameters turn green.

6. Click on Process button to apply the parameters that will be used during the Bottom

tracking.


Procedure



V.5.6.2 Tracking the Reflectors

The tracking of the reflectors is identical to the tracking of the bottom described in section

V.5.6.1. This section describes how to set up the parameters, see section V.6 for the

application of these parameters.

Step Action

1. In the Processing window, expand Detection Processing and the Reflector Tracking

label.

2. Select the detection method in the Based scrolling list.

3. If you use the Image method, enter a value for the Vertical Detection, Horizontal Detection and the Threshold Level in the corresponding text fields.

4. If you use the Signal method, enter a value for the Vertical Detection in the

corresponding text field.

5. Click in the check box of the Reflector Tracking label to activate it.

The Reflector Tracking label and all its parameters turn green.

See section V.6.1.3 for the drawing procedure of a reflector.


Procedure



V.6 Interpreting Data

V.6.1 DIGITIZING BOTTOM AND REFLECTORS You can draw reflectors and the bottom manually or with the help of an auto-tracking

mode. The following sections describe how to perform these tasks. There are great

similarities between a reflector and a bottom so the following procedures are valid for both

cases except when it is mentioned otherwise. We take the case of a reflector. The main

difference is that there can be only one bottom and many reflectors.

V.6.1.1 Creating a Reflector

THIS SECTION IS SPECIFIC TO THE REFLECTOR CASE. IT DOES NOT APPLY TO THE BOTTOM.

Step Action

1. In the Interpretation window, click on Edit button in the Interpretation window.

or on the Edit button in the Interpretation toolbar .

2. Right click on Reflector branch and select Add Reflector in the pop-up menu.

New Reflector appears under the Reflector folder.

3. Right click on New Reflector text label folder and select Rename Reflector option in the

pop-up menu that opens.

Procedure



Step Action

4. Type in “Sand” for the new reflector and press [Enter] key.

The name replaces New Reflector text label.

5. Right click on this new reflector text label and choose:

• Line Color… to select the color used to display the reflector. The defined reflector

text label turns to the color you have chosen.

• Line Style… to select the style of the reflector: solid, dashed, dotted, dash-dotted,

dash double dotted.

• Line Thickness to select the thickness of the line used to display the reflector: from 1

up to 5 pixels.


The reflectors are sorted in the alphabetic order. You can prefix their names by a number

in order to modify the display order.

V.6.1.2 Importing a Reflector

A reflector can also be imported from an ASCII file. To make this import possible, you

need to precise how the data is displayed in the ASCII file. You need to provide:

• Filename: the name of a column-formatted file that contains reflector points to import

• Lines to skip before reading the actual data

• Field separator (Space, Tabulation, Semi-Column, Comma)

• Along-track reference: (Ping Index, Along-track Distance, Coordinates) When

positions are gathered from coordinates, a range parameter allows filtering points that

are within a certain distance from the seismic profile.

• Time/Depth Index, the index of the column containing the time data in ms or in meter

with a given sound velocity

• Node Index, the index of the column containing the node data. Optionally a node type

(Start/Intermediate/End) can be used to interpret multiple fragments

• Possible Reflector name and Index of the column of reflector names (may be used as

a filter), if several reflectors are present in the file then precise the reflector name in

order to only import this reflector

• Tide corrected input set to true when no tide correction must be applied to imported

values. Set to false to additionally apply tide correction from the seismic profile.



Step Action

1. In the Interpretation window, right click on Reflector and select Add in the popup menu.

A line is added below the title with the default name New Reflector.

2. Right click on the New Reflector and select Import… in the popup menu.

The Reflector Import window opens.

3. Browse to select the ASCII Filename to import the reflector from.

Enter the number of Lines to skip, the Ping Index, the Time Index, the Node Index.

Possibly activate the Reflector option and if so enter the Index and Name of the

reflector to import. Possibly activate the Tide corrected input.

4. Enter the name of the reflector once the importation completed.

5. Click on the Start button to initiate the import and wait until completion of the process.

6. Select the Close window at the end of the processing option if it suits you.


Procedure



V.6.1.3 Drawing a Bottom/Reflector

THIS SECTION IS VALID FOR BOTH BOTTOM AND REFLECTOR CASES. THE BOTTOM CASE IS

CHOSEN.

You can draw a bottom:

• Fragment by fragment: This method is mainly used when the bottom does not expand

all along the trace (Rock outcrop case, for example). This method is easy to perform

under the manual mode.

• In only one fragment along the entire trace.

In this mode, no assumption is made about the location of the boundary or the proper path

of the layer. Instead you decide where the legs of the bottom are located by clicking on the

imagery at chosen points. This method gives you the total control over what you think the

bottom is. Use this mode if you are dealing with a highly irregular, undulating layer.


1. In the Interpretation window, expand the Bottom label.

2. In the Interpretation window, right click on Bottom and choose:

• Line Color… to select the color used to display the bottom.

The BOTTOM text label turns to the color you choose.

• Line Style to select the style of the line to display the bottom: solid, dashed, dotted,

dash-dotted, dash double dotted.

• Line Thickness to select the thickness of the bottom: from 1 up to 5 pixels.

Manual Mode



Step Action

3. Make sure that all necessary processing have been applied. For the bottom case, in the Processing window.

4. In the Interpretation window, click on the Edit button: or

You enter in drawing mode. The New Fragment button is then enabled. The

mouse cursor becomes a cross. The Edit button becomes Stop Editing.

5. In the Profile area, identify the layer upon which you want to draw the bottom, left click

at a point in the layer where you want to start defining the fragment of the bottom.

6. Continue to move with your pointer right along the layer path until you reach a location

where you want to establish a new leg of the bottom then left-click at this location.

The system displays a green line between the first click and the second one. A red line

appears between the new point and your cursor waiting for a new point to be created.

7. Continue to make new legs until you have fully drawn the bottom you wish to create.

8. Click on to quit the drawing mode. You can stay in drawing

mode to digitize another object.

The green line turns to a solid line of the color you choose for the bottom.


Semi-automatic mode: in step 6, you can also move the pointer and keep the left button

down to create new profile points at regular time intervals.

If you are drawing a fragment, perform the previous procedure as many times as needed

to draw another fragment(s) of the same reflector.



In this mode, DELPH Seismic Interpretation traces a path along the layer based on the

first few points that you establish as the bottom path. The more distinct the layer is, the

more complete the bottom will be.

If the Process button in the Processing window is set to Process all the bottom auto-

tracking mode tries to detect the bottom on the whole seismic profile. If it is set on

Process Visible Data the detection stops at the border of the displayed data.

Step Action

1. In the Processing window, activate the Bottom Tracking. The Swell filter must be

Inactive:

2. In the Interpretation window, expand Bottom folder.

3. Activate the edition by clicking on or in the toolbar.

The New Fragment button is automatically pushed in.

4. In the Profile area, visually identify the layer upon which you want to draw the bottom,

left click at the first few points and then double click to start defining the bottom line.

Press [space] bar to stop the automatic profile generation.

At the first click a red star appears, after the double click a green line is traced.

5. Perform the previous step several times to trace all the bottom, beginning at each end of

the previous automatically displayed leg. To remove a point, move the cursor on it and

right click. To remove multiple points, drag the mouse with the right button down.

Auto-tracking Mode

Procedure



Step Action

6. Click on to quit the edition mode.

The green line turns to the reflector color chosen.


This option is available when sensor depth data is present in the seismic data. This

function is only available in replay mode and specific to the Bottom case.

If a sensor depth data is present in the data file, you can use its data to automatically track

the bottom: click on in the Interpretation area. If the bottom is already defined,

DELPH Seismic Interpretation offers you to replace it by the depth sensor data (see

Figure 30). See on Figure 31 an example of a sensor bottom.

Figure 30 – Replace a bottom with the sensor bottom

Figure 31 – Example of digitized sensor bottom

Copy Sensor Depth



V.6.1.4 Displaying the Filtered Bottom

THIS SECTION IS SPECIFIC TO THE BOTTOM CASE. IT DOES NOT APPLY TO THE REFLECTORS.

You can apply the swell filter to the bottom line to get the filtered Bottom. To perform this

procedure, you must have drawn the bottom first.

Step Action

1. Expand Spatial Processing folder in the Processing Display area by left clicking on the

“+” at the left of this folder.

2. Make sure than the swell period is correct and then click on the check box to activate the

Swell Filter.

The Swell filter mode turns to ON in the Processing window. It is applied to the bottom

line. When the processing is finished, the Bottom label becomes Bottom (Filtered) label in the Interpretation window.


If you edit the value of an activated filter, then the filter is computed again.

Procedure



V.6.1.5 Suppressing a Fragment or the Entire Bottom/Reflector

THIS SECTION IS VALID FOR BOTH BOTTOM AND REFLECTOR CASE. THE BOTTOM CASE IS CHOSEN.

You can either suppress or modify fragment of the filtered bottom. To perform the

following procedure, the swell filter must be de-activated.

Step Action

1. In the Interpretation window, select Bottom.

2. Activate Edit button.

3. Click on the arrow button , select the fragment you want to suppress.

The selected fragment turns green in the Profile area.

4. Click on .

The fragment is suppressed in the Profile area.

5. Click on to quit the drawing mode.


The bottom can be entirely deleted by repeating the previous procedure as many times as

there are fragments.

Procedure



V.6.1.6 Modifying a Bottom/Reflector Fragment


You can either suppress or modify fragment of the filtered bottom. To perform the

following procedure, the swell filter must be de-activated.

Step Action

1. In the Interpretation window, select Bottom.

2. Activate the Edit button, select the fragment to modify with or .

The selected segment turns green in the Profile area.

3. • To add a new point: left click on the leg where you want to add a new point (you can

also add a new point before the first one or after the last one).

• To delete a point: select the point (a red rectangle appears) and right- click to delete.

• To delete several points: drag the mouse with the right button down over the points

that you want to remove.

• To modify the location of a point: left click on it, keep the left button pressed and

move to the new location, release the button to validate.


Procedure



V.6.1.7 Modifying the Filtered Bottom Line

THIS SECTION IS SPECIFIC TO THE BOTTOM CASE. IT DOES NOT APPLY TO THE REFLECTORS.

To modify the filtered bottom:

• Either modify the bottom line and then apply the swell filter to this modified bottom (see

section V.6.1.4).

• Or modify the swell period and then apply it (see section V.5.5.2).

V.6.1.8 Display the First Multiple of the Bottom/Reflector


This function looks for the first multiple of the seafloor. Once a bottom has been added or

digitized on the seismic profile, right click on the Bottom name and select Display First Multiple in the pop-up menu.

Step Action

1. In the Interpretation window, select the Bottom.

2. Right-click and select Display First Multiple option in the pop-up menu displayed.

The first multiple displays in the Profile area with a paler color than the selected reflector.


Procedure



V.6.2 MANAGING THE CROSSINGS OF REFLECTORS

V.6.2.1 Computing the Crossings

For each seismic profile, you can compute the values of the digitized reflectors at the

vertical of the cross-line points:

All Profiles Computation

Step Action

1. Click Update all crossings button in the DS Interpretation replay loader or select the

menu Tools ► Update All Crossings.

The DELPH Seismic Interpretation main window displays.

Blue circles appear for each cross line point, pointing the mouse to this rectangle

displays the time.


Current Profile Computation To update the crossings after a reflector creation or modification:

Step Action

1. Click Compute Crossings button in the Interpretation area or select the menu

Tools ► Compute Crossings.


Procedure

Procedure



V.6.2.2 Navigating Between Profiles using Crossings

The crossings present in the displayed profile enable you to navigate between the

different profiles:

• Moving your pointer above the crossing arrow displays its tool tip giving the

corresponding profile name:

• Double-clicking with the left mouse button opens the corresponding profile in a new

DELPH Seismic Interpretation window:

Figure 32 – Crossing Profile is highlighted in Green

• When a profile is active, the crossing points in the secant profiles are highlighted (pale

green, see Figure 14).

• A single click on the crossing arrow displays or masks the vertical line (see Figure 33),

you can also click on Crossings and again on the check box that appears to hide or

show all of them:



Figure 33 – Click on Arrow to hide the Vertical Line



V.6.3 APPLYING TIDE AND STATIC CORRECTIONS

This tool allows you to apply tide or static corrections to the seismic data files. During the

survey, you have acquired data over the time of one or several tidal cycles. The tidal

offsets must be removed from the data. In this tool, you import a file (or import it manually)

in which are listed the tide data from a nearby tide gauge over the duration of the survey.

The processing consists in removing the tidal offset from the data with respect of the time

of acquisition.

The static correction is a tool that uses the line crossings. At the crossing there is often a

vertical shift between the two lines. This shift is due to the tide difference at the two times

of acquisition or to other factors such as the variation of the draft of the survey vessel. The

static correction tool estimates these shifts and edits the current line in order to make it

match to all the crossing lines. This tool can be used to optimize the tidal corrections by

removing the residual shifts that can remain after correction or if no tidal data is available

to remove the shifts in an arbitrary way.

Figure 34 – Tide and Static Corrections

Tide Corrections

Static Corrections



V.6.3.1 Tide Corrections

To apply the tide corrections to seismic line(s), follow the procedures:

Importing From a File Procedure

Step Action

1. In DELPH Seismic Interpretation, select Tools > Static/Tide post-processing.

In DELPH RoadMap, right click on one specific seismic file name or on the Data Files

folder for a batch processing and select respectively Tools > Static/Tide post-processing and Static/Tide post-processing.

The tool window opens.

2. Check that the date and time are correct. If necessary, click under Starting date and

select a proper date in the calendar that opens.

3. Click on the Tide tab.



Step Action

4. Click on the Import button. Select the File path that you want to import. Describe the

Lines to skip, the Field separator and the Tide, Date and Time fields and their Index.

5. Click on Start. The tide file is imported and displayed in a small graph.

6. Click on Start button to apply these tide corrections to the current file. You can select the

Close window at the end of processing option.




Entering Manually

Step Action

1. Select Tools > Static/Tide post-processing.


2. Click on the Tide tab.

3. Right Click on the table and select New Tide Correction.

4. Enter a Date, Time and Tide Value and click OK.

A new value is entered in the table. The display of the tidal curve is updated.

5. Repeat Step 4 until you have entered all tidal data.

6. Click on Start button to apply these tide corrections to the current file. You can select the

Close window at the end of processing option.


Procedure



V.6.3.2 Static Corrections

Computing the Corrections

Step Action



2. Open the Static tab and click on Compute.

The following window opens:

3. Select the files from which you want to compute the shift to the current file. You can click on Select All if you want to select all the crossing lines. Click on Compute.

The shifts between the current line and each crossing lines are computed and displayed.

4. Click on Start to apply these corrections to the data. You can select the Close window at the end of processing option.


Procedure



Entering Manually

Step Action



2. Select the Static tab.

3. Right click on the table and select New Tide Correction.

4. Select the File and Ping Number where you want to apply a Static Correction.

5. Enter a Static Correction Value.

6. Repeat from Step 4 until you have entered all the static corrections that you want to

apply.

7. Click on Start to apply these corrections to the data. You can select the Close window at the end of processing option.


Procedure



V.6.4 ADDING ANNOTATIONS

You have the option to make annotations on the seismic profile to help the data

interpretation. Two toolbars are dedicated to the annotation options. See Figure 35.

Figure 35 - Annotation and Text Toolbars

From left to right, the different tools available are:

• Selection: Allow the selection of annotation objects

• Line: Draw a straight line

• Polyline: Draw a broken line

• Polygon: Draw a closed broken line

• Rectangle: Draw a rectangle

• Oval: Draw an oval

• Insert symbol: Insert a anchor symbol in the image

• Insert picture: Insert an image over the data

• Fill Color: fill closed objects with color

• Line Color: change the color of linear object

• Text Color: change text color

In the Interpretation window, you have the option to hide or show the different annotation

objects that are present on the data.

For all the annotation tools type Enter to validate or Esc to cancel.

Figure 36 – Hide or Show the Annotation Objects

Figure 37 – Example of Annotation on a Seismic Profile



V.6.4.1 Selecting Objects

The selection of annotation objects is made with the pointer tool . This tool allows

many operations on the objects.

Selecting Multiple Objects

Step Action

1. Left click to select the first object.

2. Press [Shift] and left click on the second object.

The two objects are both selected. Operations can be applied on both objects.


Selecting Overlapping Objects

Step Action

1. Left click to select the object in the foreground.

2. Repeat the left click to select one after the other the objects behind the first one.


Moving Objects

Step Action

1. Left click on the object to select it.

2. Left click on the selected object and do not release the mouse button.

3. Move the mouse to another location.

The object follows the mouse.

4. Release the mouse button when you have reached the location of your choice.


Procedure

Procedure

Procedure



Duplicating Objects

Step Action


2. Left click on the selected object and do not release the mouse button.

3. Press [Ctrl] and move the mouse to another location.

A second object identical to the first one appears below the mouse.

4. Release the mouse button when you have reached the location of your choice.


Removing Objects

Step Action


2. Press [Del] or [Backspace].

The object is destroyed.


Changing Objects Order

Step Action


2. Right click on the object.

A pop-up menu opens.

3. Select Order and one of the four items available

• Front: to move the object in the foreground

• Forward: to move the object one step toward the foreground

• Backward: to move the object one step toward the background

• Back: to move the object in the background


Procedure

Procedure

Procedure



Changing Objects Properties (General, Pen, Text Block, Text Font)

This section describes how to edit the properties of an annotation object.

Different tabs appear depending on the type of the selected object. For example, there is

no Fill properties for a symbol object.

The last applied properties are used for the next created object. In case of multiple objects

selection, the properties menu item is grayed.

Step Action

1. Right click on a selected object and select Properties in the popup menu that opens.

The Annotation Properties window opens.

2. In the General tab, enter the Label and the Description.

3. Select the Pen tab. Select the Style, the Color, the Thickness, the Start and End Symbol (unavailable for a closed object).

The window appears like:

Procedure



Step Action

4. Select the Fill tab.

Select the Style and the Color of the Annotation.

5. Select the Text Bloc tab.

Click in front of Horizontal Alignment and select between Left, Center and Right. Click in front of Vertical Alignment and select between Top, Middle and Bottom. The window appears like:

6. Select the Text Font tab. Select the Font name, the Size, the Color and the style (Bold, Italic, Underline and Outline). The window appears like:



Step Action

7. When the selected object is a symbol, an additional Symbol tab appears in the

Properties window. Select the new type of Symbol, Size and Color.

8. When the object is an image, an additional Image tab appears in the Properties window.

Select the Keep Ratio option and the adjustment side (Height or Width).

Select the Horizontal and Vertical anchoring points. The anchorage points do not

move with respect to the seismic data when the display is distorted (zoom …).

Select the image Transparency and the Transparency Color.

9. Click OK or Apply to validate your choices.

OK closes the window, Apply keeps the window opened, it is then possible to select

another object and to edit its properties in the same window.




V.6.4.2 Drawing Straight Lines

Step Action

1. Select the Straight Line tool .

2. Left click and drag the mouse to another location.

3. Release the mouse button.

A straight line is drawn between the location where you clicked first and the location

where you released the mouse.


V.6.4.3 Drawing Poly-lines

Step Action

1. Select the Poly-line tool

2. Left click, release the mouse button and move the mouse to another location.

A first segment appears.

3. Repeat the step 1 to add points to the poly-line as many times as needed.

4. Double click to terminate the poly-line.


V.6.4.4 Drawing Polygons

Step Action

1. Select the Polygon tool .

2. Left click, release the mouse button and move the mouse to another location.

A first segment appears.

3. Repeat the step 1 to add points to the polygon as many times as needed.

The last point added is linked to the first point of your polygon.

4. Double click to terminate the polygon.


Procedure

Procedure

Procedure



V.6.4.5 Drawing Rectangles

Step Action

1. Select the Rectangle tool .

2. Left click and drag the mouse to define the size of the rectangle.


A rectangle is drawn between the location where you clicked first and the location where

you released the mouse.


V.6.4.6 Drawing Ellipses

Step Action

1. Select the Ellipse tool .

2. Left click and drag the mouse to define the size of the ellipse.


An ellipse is drawn between the location where you clicked first and the location where

you released the mouse.


V.6.4.7 Inserting Symbols

Step Action

1. Select the Symbol tool .

2. Click in the display area at the place where you want to insert the symbol.

The default symbol appears at the location where you have clicked.


Procedure

Procedure

Procedure



V.6.4.8 Inserting Images

Step Action

1. Select the Image tool .

2. Click in the display area at the place where you want to insert the image.

The File Open window opens.

3. Browse the folders to select the image file to insert in the display.

4. Click OK.

The image is inserted in the display area.

5. Adjust the size of the image by shifting the sides with the mouse.


V.6.4.9 Customizing Color

The color can be affected to all objects in three different ways. The operator can fill an

object with color, change the contour color of a linear object and change the color of an

object label. The color properties are also available in the Properties Window.

Step Action

1. Select the closed object (Polygon, Rectangle, Ellipse) from which you want to change

the color.

2. Click on the Fill Color tool and select the color in the palette that opens.

The object changes color.


Step Action

1. Select the linear object (Straight Line, Polyline) from which you want to change the

color.

2. Click on the Pen Color tool and select the color in the palette that opens.

The linear object changes color.


Procedure

Closed Object

Linear Object



Step Action

1. Select the object from which you want to change the label color.

2. Click on the Text Color tool and select the color in the palette that opens.

The object changes color.


V.6.4.10 Customizing Text

Step Action

1. Select the object of which you want to change the font, size, style and alignment.

2. Select a font, a size, a style or a alignment in the text toolbar.

The text changes.


V.6.4.11 Customizing Shapes

Right click on the Poly-line and select Close the shape in the pop-up menu to transform

the poly-line into a polygon.

Right click on the Polygon and select Open the shape in the pop-up menu to transform

the polygon into a poly-line.

It is possible to move one or several points of a Poly-line, Polygon or Segment already

created. Right click on the shape, select Modify Points, click on the point that you want to

move and slide it to its new location.

Text Object

Procedure

Closing a Poly-line

Opening a Polygon

Moving points



V.6.5 ADDING, IMPORTING AND DISPLAYING GROUND TRUTHING

Please report to DELPH RoadMap User Guide for a complete description of the ground

truthing data.

Ground truthing information may be imported in DELPH Seismic Interpretation.

Step Action

1. In DELPH Seismic Interpretation, select File > Import > Ground Truthing … The Ground Truthing Import window opens.

2. Click on Add and select the ground truthing files that you want to import.

3. Click on Start and wait until the processing is completed.

The data has now been imported into DELPH Seismic Interpretation and the files are

visible in the Interpretation panel.

4. Right click on the ground truthing files in order to edit, hide, show or remove them.


Figure 38 – Ground truthing in DELPH Seismic Interpretation

Procedure



V.7 Exporting Data

Data can be exported under different formats.

• Reflectors can be exported in HTML or CSV format file.

• Images of seismic profiles with information printed on it can be exported in TIF files.

• Thickness between two digitalized reflectors can also be exported in HTML format file.

V.7.1 EXPORTING INTERPRETATION

V.7.1.1 Exporting Digitized Reflectors in HTML Format

Once the bottom and/or reflectors have been digitized, you can export them to an HTML

file. This data is composed of positions and travel times. It can be imported into any other

application for additional processing.

Step Action

1. In the Interpretation window, select the bottom or reflector you want to export.

2. Select File ► Export ► Selected Bottom/Reflector to HTML…

A window giving you the path of the created text file data appears.

3. Click Yes if you want to open this data window in your browser otherwise click No.

The data file is created in the folder target. It has this structure:

…


These files can be opened in Microsoft Excel.

Procedure



V.7.1.2 Exporting Digitized Reflectors in CSV Format

You can export reflectors into CSV format from the DELPH Seismic Interpretation Replay

Loader or from DELPH RoadMap:

• From the Replay Loader: Select the file(s) from which you want to export reflector(s)

and click on the Interpretation Export… button .

• From the DELPH Seismic Interpretation window: under File > Export > Interpretation

menu

• From DELPH RoadMap: Right click on Seismic > Data Files and select Export > Interpretation, see Figure 39

Figure 39 – Export Reflectors from DELPH RoadMap

The Interpretation Export window is shown in Figure 40. It is composed of an area on top

where you can select the file(s) and the reflector(s) and below the selection of the

importation parameters. At the bottom of the window you launch the exportation.

• General Resolution: Two options are possible: Digitized Points (only the values at the

location of the digitized points are exported) or Along Track Resolution with a

user-defined Step.

• Geodesy Input: geodesy of the input data

Chart: projected geodesy of the output data

• Export Information Reference Horizon: You can export the reflector with respect to the Start of

Acquisition of the trace or to one of the reflectors present in the file(s).

Travel Time Export: This option allows you to have the travel time in the export file.

Depth Export: This option allows you to have the depth in the export file.

Access

Export Window



• Output File Format: You can choose a comma or a semi column as field separator.

File Path: Browse for the folder and enter a file name.

Figure 40 – Interpretation Export window

Step Action

1. Open the Interpretation Export Window either from DELPH Seismic Interpretation or

from DELPH RoadMap.

2. In the Data Files area, select the file(s) from which you want to export one or several

reflector(s).

3. In the Horizons area, select the reflector(s) that you want to export.

4. In the Settings area, expand the General label and choose a Resolution in the scrolling

list. If you choose Along Track Resolution, enter a resolution Step.

5. Expand the Geodesy label, select the Input and Chart geodesies in the geodesy

selection window.

Procedure



Step Action

6. Expand the Export Information label, choose the Reference Horizon, you can activate

the Export Travel Time and/or the Export Depth option. If you activate the Export Depth option, enter also a corresponding Sound Velocity value.

7. Expand the Output label,

8. Select the Open the processing result or the Close window at the end of processing

options.

9. Click on Start.

The processing is launched. You can follow its completion on the progress bar.


An example of an export of a reflector under a CSV format is shown in Figure 41.

Figure 41 – Reflector export example



V.7.1.3 Exporting Thickness

This function allows you to compute the difference between two reflectors or between a

reflector and the bottom. The difference is made at every shot. The result (see Figure 42)

is saved in an HTML or CSV file. This computation is performed at a specified sound

speed.

Figure 42 – Thickness File Detail

Alternatively, the Interpretation export tool may be used to export thicknesses using a

specific resolution for one or multiple profiles.



Step Action

1. Select File ► Export ► Thicknesses…,

2. Select the Upper Limit of the difference. Left click on Upper Limit.

3. Select the Lower Limit of the difference. Left click on Lower Limit.

4. Select the Sound Velocity to compute the distances. Left click on Sound Velocity.

5. Select the output file. Left click on Exported File Path.

6. Click OK to start the computation.

The parameter window closes. The HTML result file opens. See Figure 42.


Procedure



V.7.2 EXPORTING IMAGERY

Seismic profiles can be exported with DELPH Seismic Interpretation in different formats.

V.7.2.1 Exporting in TIF Format

The File > Export > Image only as TIF (Plotter Mode)… menu of DELPH Seismic

Interpretation menu bar allows exporting the seismic data as a TIF file.

In the Replay Loader, select several files that you want to export in TIFF format and click

on the button.

The data has an 8-bit format. The seismic values are between 0 and 255. Each column of

the image is composed of all the samples that define it. In the Export as TIFF… window

(see Figure 43) and you can:

• Choose to display the Distance Resolution in the along-track, the Full Profile or data

between the ping exclusion at start/end of line, the Orientation as a Landscape or a

Portrait and the positive, negative or both Polarity

• Choose to include a Distance Scale in the TIF image

Choose to Display the scales (Active) or not (Inactive)

Define its Spacing

Add Annotations like profile name, ping number, date, time, position, kilometer

point, depth, altitude and heading

• Choose to Display a Time Scale in the TIF image or not, define its Spacing in ms

• Choose the Color Palette Model, the Repartition and the order of the palette

(Reverse or not)

• Choose the Output Storage Folder and file name Model

For small/medium size profiles, portrait orientation is faster and the image may be flipped

using a standard image editing software.

Single Export

Batch Export



Figure 43 – Parameters displayed on the TIF file

The export tool takes into account the topo correction and the heave correction if these

processing have been selected. See on Figure 44 two exported TIF images with and

without the topo and heave corrections.

Figure 44 - Example of a seismic data TIF file with topo and heave correction (left) and without (right)

Figure 45 – Print all Parameters on the TIF to be exported



V.7.2.2 Exporting with the Snapshot Tool

From DELPH Seismic Interpretation, it is possible to take a snapshot of the current display

and to save it under an image format. Use the toolbar button , the Tools > Snapshot

menu item or the [F9] key.

In the Tools > Settings menu, you can configure the Snapshot tool. You configure the

• Magnification: choose one of the three available sizes of output image (x1, x2, x4).

• Format: choose one of the three available image formats (jpeg, bmp, tiff).

• Storage Folder: choose the location of the storage of the output image file.

From DELPH RoadMap it is possible to export the data display in a .bmp format by using

the menu option Tools ► Snapshot or the toolbar button .

If the command is grayed, click on the display area to activate it.

V.7.2.3 Exporting the Interpreted Profile

The interpreted profile may be exported with the help of the menu item File > Export…> Interpreted Profile Image…

Step Action

1. In DELPH Seismic Interpretation, select File > Export…> Interpreted Profile Image…

2. Select the Full Scale Resolution, or the User–Defined with the specific Along-Track

and Vertical resolutions.

3. Select the Distance Scale as displayed in the DELPH Seismic window with the Use Display Settings option or select the User–Defined Distance Scale with an optionally

activated Display, a specific Spacing and the specifically activated Annotations.

4. Select the Time Scale as displayed in the DELPH Seismic window with the Use Display Settings option or select the User–Defined Distance Scale with an optionally activated

Display and a specific Spacing.

DELPH Seismic

Interpretation

DELPH RoadMap

Procedure



Step Action

5. Enter the Output settings: Storage Folder, Format and File Name.

6. Click on OK to validate your choice.

The export takes place.




V.8 Printing Data

DELPH Seismic Interpretation allows you to print the seismic data acquired. Printing is only available in replay mode. You can organize a page layout before printing.

The page layout divides the page into three areas:

• The header: at the top of the page, this area enables the printing of a title and a logo.

• The data: in the center of the page, it contains the seismic data.

• The footer: in the bottom of the page, it contains information about the data.

The scale of the displayed data can be the current scale or a user defined sale.

The parameters to define the page layout are accessible from the Page Layout option of

the File menu.

Step Action

1. Choose File ► Page layout… in the DELPH Seismic Interpretation menu bar.

The Print Layout window opens.

2. In the Header section:

• Define the height of the header (in mm) in the Height box.

• If you want to add a logo, activate the Logo check box. Click on to find the logo

image file that you want to insert on your print.

• If you want to add a title, activate the Title check box. Type the text in the adjacent

text field

3. In the Scale section, select the resolution in the corresponding scrolling list. Select

between the Display resolution or a User Defined resolution. In the case of a User

Defined resolution, enter the Across Track and the Along Track resolutions.

4. Click OK.

The Print Layout window disappears.

Procedure



Step Action

5. To get a preview before printing, click on or select File > Print Preview

6. Click on Print… in the preview window then select the printer and define the page layout

in the window that opens.


You can directly print without using the print preview by clicking on .



VI GEOSECTIONS

VI.1 Introduction

A GeoSection is the 3D geo-referenced representation of a seismic profile as an image in

DELPH RoadMap. Several GeoSections can be visualized together with seismic DTMs in

DELPH RoadMap to help the 3D seismic interpretation.

VI.2 Excluding Bad Data Areas

In order to prevent some data to appear on GeoSections, this data can be excluded from

the GeoSection building. Two methods are available to exclude data:

• Ping exclusion: the data is excluded depending on its ping number.

• Range exclusion: the data is excluded depending on its range from the top or bottom of

the profile

VI.2.1 PING EXCLUSION

Step Action

1. In DELPH Seismic Interpretation main window, select Tools > Mode > Pings Exclusion.

2. Move the mouse cursor to the first ping that starts the interval to be excluded.

3. Press the mouse button.

4. Move the mouse cursor to the last ping that you want to exclude.


The selected data to be excluded is highlighted in red.


Procedure



VI.2.2 RANGE EXCLUSION

Step Action

1. In DELPH Seismic Interpretation main window, select Tools > Mode > Ranges Exclusion.

A horizontal dashed line is drawn in the middle range of the profile. The mouse cursor

changes its shape when it crosses the line. The exclusion is made from the top/bottom of

the profile when the mouse cursor is above/below the dashed line.

2. Move the mouse cursor to the range (vertically) and to the first ping (horizontally) that

starts the interval to be excluded.

3. Press the mouse button.

4. Move the mouse cursor to the last ping that you want to exclude.


The selected data to be excluded is highlighted in red.


VI.2.3 CANCELLING DATA EXCLUSION

If you wrongly excluded data, you can bring back the excluded data by the same

procedures as described in sections VI.2.1 and VI.2.2 but with the right mouse button

instead of the left mouse button.

Procedure



VI.3 Building GeoSections

VI.3.1 GEOSECTION PRINCIPLE

The GeoSection image is built accordingly to the following parameters:

• Processing Parameters

Horizontal Resolution: in meters

Vertical Resolution: in propagation time

Excluded Areas: can be included or not in the geo-section.

Transparent Water-column: is an option to display or not the data acquired in the

water column.

Signal Polarity: is an option to input the Positive or Negative or both Pos&Neg

values of the trace in the geo-section.

Navigation Precision: The smooth ship navigation is decimated in segments

forming a broken line. The precision entered by the operator corresponds to the

maximum orthogonal distance between the decimated segments and the actual

navigation of the survey vessel.

• Geodesy of the Input data and of the Chart in which the GeoSections are to be

inserted.

• Color palette: including the Color Model, the Color Repartition and the eventual

inversion (Reverse).

• Output/File Name: In case of multiple GeoSections there are different ways to name

the files. A few models for multiple files are proposed. You can also define his own

model.

VI.3.2 BUILDING GEOSECTIONS IN REPLAY MODE

The GeoSection building is launched directly from the seismic file listed in DELPH Seismic

Replay Loader. Follow the procedure to build a GeoSection.



Step Action

1. In the Replay Loader, select the file(s) from which you want to build a GeoSection(s).

2. Click on .

3. Enter or select the Horizontal Resolution and the Vertical Resolution in the

corresponding scrolling lists. Set the Excluded Areas and Transparent Water-Column

to True or False. Set the Signal Polarity to Positive, Negative or Pos&Neg. Enter or

select the Navigation Precision in the scrolling list.

Procedure



Step Action

4. Select the Geodesy as explained in section V.4.

5. Select the Color Model and the Color Repartition in the corresponding scrolling lists.

Activate or deactivate the Reverse option.

6. Browse to select the Output / File Name.

7. You can select the Open the processing result or the Close window at the end of processing options.

8. Click on Start to build the GeoSections, follow the progress bar.


User defined output filename: You can design the output filename. Here are some keys:

• %l : input filename without extension

• %e : input filename with extension

• %c : number of the processed channel (always 0)

Examples:

• The user types GeoSection_%l, the input filename is line91.seg, the name of the

GeoSection is: GeoSection_line91.xms

• The user types GeoSection_%l%c the input filename is line91.seg, the name of the

GeoSection is: GeoSection_line91_chan0.xms

The GeoSections can be visualized in DELPH RoadMap. See on Figure 46 the a series of

GeoSections that cross each other.

Figure 46 – Example of multiple visualization of GeoSections

Visualization



VI.3.3 BUILDING GEOSECTIONS IN REAL TIME

The GeoSections can also be built in real time mode. Refer to V.1.1.1 for the procedure to

apply.

Figure 47 – DELPH RoadMap Window in Real Time

Procedure



VII DIGITAL TERRAIN MODELING

VII.1 Introduction

DELPH Seismic offers the ability to build Digital Terrain Models (DTM) from digitized

reflectors belonging to the same geological interface and to different seismic profiles. The

DTM is first built as a Triangular Irregular Model (TIN). It is then gridded on a regular grid

with a user defined sampling. At the end the DTM is based on a regular grid.

The sea bottom digitized from seismic profiles can also be used to build a DTM. The 3D

View option in DELPH RoadMap allows multiple DTM visualization. The DTM building can

be indifferently launched from the Replay Loader or from DELPH RoadMap.

VII.2 Excluding Bad Data Areas

See section VI.2.

VII.3 Building DTMs

VII.3.1 PARAMETERS A few parameters are needed to build a reflector DTM:

• Processing parameters

Resolution: This parameter is the size of the grid cell. A high resolution leads to a

complex DTM (large number of triangles) and costs a long time to compute.

Use Exclusion Areas: This parameter let you choose if you want to include in the

DTM all the data that you excluded in the interpretation or not.

Automatic Gap Detection: This option detects the convex holes in the DTM so that

these holes are not filled during the TIN building. It is recommended in the case of

multi segment reflectors so that the space between the two segments is not

interpolated. The limits of this algorithm are the presence of non convex and islands

in the holes.

• Geodesy parameters

Input: geodesy of the input data.

Chart: geodesy of the resulting map.

• Output/File Name

Storage file: path and filename of the DTM. The DTM is stored in a .xmd file. See

Appendix A.1 for more details about this format.

• Options: You can choose to open immediately the DTM in DELPH RoadMap and to

close the DTM generator window at the end of the processing.



VII.3.2 LAUNCHING THE DTMS BUILDING The DTM building can be launched from DELPH Replay Loader and from DELPH

RoadMap. The two following procedures explain these launching.

VII.3.2.1 From DELPH Seismic Interpretation

Step Action

1. Launch DELPH Seismic Interpretation.

The Replay Loader opens.

2. Load the seismic files that you want to include in the DTM.

The files you selected appear in the list.

3. Select the Geodesies as detailed in the section 0.

4. Digitize the bottom and/or one or several reflectors for each profiles. See section V.6.1.

5. Click on , the Generate a model button.

Procedure



Step Action

6. Select the reflector and the associated files that you want to include in the DTM.

7. Click OK.

The DTM Generator window opens.

8. Enter a Resolution value, enable or disable Use Exclusion Area and Automatic Gap Detection options. Select the Geodesy and the Output/File Name. You can select the

Open the processing result or the Close window at the end of processing options.

9. Select the gridding parameters and click Start.

The DTM is being built. It is stored in a .xmd file and one or several .tif/.tfw files. It

can be visualized with DELPH RoadMap. See section IV.




VII.3.2.2 From DELPH RoadMap

Step Action

1. Launch DELPH RoadMap.

The DELPH RoadMap application opens.

2. Select the Geodesies as detailed in the section 0.

3. Load the seismic files that you want to include in the DTM.

The files are listed under the Seismic and Data Files branch.

4. For each profile, right click on its name and select Analyze… in the popup menu.

5. For each profile, digitize the bottom and/or one or several reflectors. See section V.6.1.

The display in DELPH RoadMap looks like:

6. Right click on one of the reflector names under the Reflector branch then select the

option Build DTM… in the pop-up menu.

The selection window opens listing all the files that contain the reflector.

Procedure



Step Action

7. Select the seismic files that you want to include in the DTM by clicking the checkboxes.

8. Click OK.

The DTM generator window opens

9. Enter a Resolution value, enable or disable the Use Exclusion Area and Automatic Gap Detection options. Select the Geodesy and the Output/File Name. You can select

the Open the processing result or the Close window at the end of processing

options.

10. Select the gridding parameters and click Start.

The DTM is being built. It is stored in an .xmd file. It can be visualized with DELPH

RoadMap. See section IV.




VII.4 Building an Isopach Map

VII.4.1 DEFINITION

An Isopach map illustrates the thickness variations between two reflectors. The thickness

data is stored in a DTM, in a .xmd file.

VII.4.2 PARAMETERS

The user selects the following parameters in order to create an Isopach map:

• The Data Files from which the data is used to build the map

• The Lower and Upper Horizons between which you want to compute the thickness

• The General parameters

Gridding Method: several methods are available (Inverse distance to a power, Moving average, Nearest neighbor, Minimum and Maximum values)

Resolution: size of the grid cell

Search Radius: area around the grid cell defining which data is used to compute

the cell value Use Exclusion Areas (Active or Inactive)

Sound Velocity

• The Geodesy parameters: Input and Chart projections

• The Output Storage File

Figure 48 – Isopach Map Generator parameters window



VII.4.3 FROM DELPH ROADMAP


1. In DELPH RoadMap, in the Project View, right click on Data Files and select Build Isopach Map…

2. Select the Data Files from which you want to include the contents in the Isopach map.

3. Select the Upper Horizon and the Lower Horizon in the corresponding lists.

4. Select the General parameters: the Gridding Method, the Resolution, the Search Radius, the Use Exclusion Areas option and the Sound Volocity.

5. Select the Input and Chart geodesy.

6. Select the Output Storage File.

7. You may select the Open the processing result and Close window at the end of the processing options.

8. Click on Start.

The progress bar displays the level of completion of the processing. The resulting .xmd

DTM file is created and immediately opened if this option has been chosen.


VII.4.4 FROM DELPH SEISMIC REPLAY LOADER


1. In DELPH Seismic Replay Loader, select the files that you want to include in the

processing.

2. Click on .

The Isopach Map Generator window opens.

3. Follow the steps 3 to 8 from the procedure explained in section 0




VII.5 Building Iso-Contours

Please refer to DELPH RoadMap user guide for a complete description of the iso-contours

generation.

VII.6 Exporting DTMs to Google Earth

DTMs generated by DELPH Seismic Interpretation may be exported to be visualized in

Google Earth application. The .xmd file is converted into a .kmz file compatible with

Google Earth.


1. Once the DTM has been generated, the file name is displayed in the Project view. Right click on this file name and select Export > To Google Earth …

2. Select a folder where to store the .kmz file.

The file is automatically opened in Google Earth.




VII.7 Visualizing in DELPH RoadMap

Once built, the DTM can be visualized DELPH RoadMap.

In the example on Figure 49, two DTMs are shown. The first one, called Bottom, has a red

color palette. The second one, called Rock, has a rainbow color palette. The Bottom DTM

has a hole where the rock DTM shows an outcrop.

Figure 49 – DTM visualization in DELPH RoadMap

Right click on the DTM name to open the popup menu, select the Properties option. The

Seismic DTM window opens. See Figure 50.

• Under Color palette tab: You can edit the set of colors in which the DTM is displayed.

Add, edit, remove a color, and choose the DTM values interval in which the color

palette is spread.

• Under Display Properties tab: The Transparency allows to see data through an

overlaying DTM.

Figure 50 – Seismic DTM Color Palette and Display Properties

DELPH RoadMap



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Appendices

A. XMD DTM AND XMS GEOSECTION FILE FORMATS

A.1 XMD DTM File Format The DTM are stored with the extension .xmd. In fact they are generated in XML format

files. See one file contents on Figure 51.

Figure 51 – Content of a mosaic file in XML format

You can notice on this figure in order:

• The data type, version and size

• The resolution and DTM building method

• The input data geodesy

• The map geodesy

• The file names of the seismic profiles used to build this DTM (9 files here)

• The reflector name, minimum and maximum values in seconds

• The list of all the .tif files composing the DTM, they are followed by their coordinates

within the DTM.



A.2 XMS GeoSection File Format The GeoSections are stored with the extension .xms. In fact they are generated in XML

format files. See one file contents on Figure 52.

<?xml version="1.0" encoding="ISO-8859-1" ?> - <verticalMosaic version="1.0" dataType="seismicGeoSection" zUnit="ms" zRes="0.1"

zOffset="0" zScale="1.5"> - <imagery noDataValue="0" channel="0">

<tile file="LINE091_R0_D0.tif" hPos="0" vPos="0" from="0" to="912.732" dataWidth="913" />

<tile file="LINE091_R0_D1.tif" hPos="0" vPos="1" from="0" to="912.732" dataWidth="913" />

<tile file="LINE091_R0_D2.tif" hPos="0" vPos="2" from="0" to="912.732" dataWidth="913" dataHeight="449" />

</imagery> - <path>

<point d="0" x="-13626455.538" y="4527689.558" h="0" /> <point d="26.938" x="-13626469.03" y="4527720.74" h="0" /> <point d="39.274" x="-13626471.292" y="4527736.067" h="0" /> <point d="57.571" x="-13626469.601" y="4527759.018" h="0" /> <point d="82.977" x="-13626457.735" y="4527788.751" h="0" /> <point d="115.534" x="-13626434.061" y="4527822.322" h="0" /> <point d="128.801" x="-13626421.449" y="4527833.375" h="0" /> <point d="153.769" x="-13626394.93" y="4527850.479" h="0" /> <point d="217.007" x="-13626315.714" y="4527849.502" h="0" /> <point d="269.62" x="-13626249.783" y="4527857.904" h="0" /> <point d="322.174" x="-13626183.358" y="4527859.356" h="0" /> <point d="517.101" x="-13625937.685" y="4527878.05" h="0" /> <point d="582.755" x="-13625854.7" y="4527876.731" h="0" /> <point d="633.664" x="-13625790.522" y="4527871.683" h="0" /> <point d="786.676" x="-13625597.057" y="4527867.734" h="0" /> <point d="838.807" x="-13625531.145" y="4527867.818" h="0" /> <point d="912.732" x="-13625438.048" y="4527876.197" h="0" />

</path> - <parameters>

<general horizontalRes="1" verticalRes="0.1" useExcludedAreas="0" polarity="positiv" heaveCorrection="0" invertHeave="0" swellCorrection="0" tideCorrection="0" />

<palette model="gray" repartition="linear" reversed="-1" /> <geodesy input="ESRI::GEOGCS["WGS

1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]" map="ESRI::PROJCS["Mercator (world)",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Mercator"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],PARAMETER["Standard_Parallel_1",0],UNIT["Meter",1]]" />

<dataSource file="C:\iXBlue V2.6 BN32\DELPH\Samples\Seismic\LINE091.SEG" />

</parameters> <geodesy label="Mercator (world)" syntax="esri">PROJCS["Mercator

(world)",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Mercator"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],PARAMETER["Standard_Parallel_1",0],UNIT["Meter",1]]</geodesy>

<boundedBy xMin="-13626471.2924411" xMax="-13625438.0472719" yMin="4527689.55824203" yMax="4527878.05017977" hMin="0" hMax="0" />

</verticalMosaic> Figure 52 – Contents of a GeoSection XMS file format



B. ADDITIONAL TOOLS

B.1 DELPH Geodetic Converter This tool is designed to verify and define geodetic conversions. You may convert latitude

longitude couples from one geodesy to another, you may also convert two columns of

latitude and longitude from a text file.

Figure 53 – DELPH Geodetic Converter window

Step Action

1. In the Input Geodesy area, click on the browse button and select the input geodesy.

The input geodesy is displayed in the left frame.

2. In the Output Geodesy area, click on the browse button and select the output geodesy.

The input geodesy is displayed in the right frame.

3. For a simple latitude longitude conversion: enter an input position: fill the Lat / Northing

and Lon / Easting fields. Right-click on the position input field to open a popup menu to

change the format:

• DMS: Degrees, Minutes, Seconds

• DMX: Degrees, minutes and hundredth of minutes

• DXX: Degrees and hundredth of degrees

Procedure



Step Action

4. For a conversion of two rows of latitude longitude from a text file: enter a text file in the Input File field. Enter the index of the latitude and longitude columns in the file into the X Index and Y Index fields. You may enter an Output File Suffix for the output file.

5. Click on Convert to perform a coordinate conversion to the output geodetic system.

The output position fields show the converted values.


Modifications that are made on geodetic systems from this utility are available from any

other geodesy selection interface throughout DELPH software. Loading a file is possible.



B.2 DELPH Nav Inverter This tool is designed to invert the sign of the Longitude/Easting and/or the

Latitude/Northing in a XTF file. It is a command tool.

Figure 54 – DELPH Nav Inverter Icon

Command: DELPHNavInverter [-out output] [-force true | false] [-invertX

true | false] [-invertX true | false]

Options:

• out: Path for the file to create. It can be a full file path or a file name. If not specified,

the input file with a ‘-inv’ suffix

• force: if set to true, an existing output file will be overwritten. Otherwise the processing

will be skipped. This option default is true • invertX: Change the sign for the Easting/Latitude

• invertY: Change the sign for the Northing/Longitude

Step Action

1. Open the command prompt of your operating system.

2. Type the command with the appropriate options and the path of the file to process.

3. Press [Enter]and wait until the end of the processing.


The operator can also invert the navigation of a file by dragging the file on top of the

DELPH Nav Inverter application icon. The default options present in the .ini file are then

applied. Editing of the .ini file is possible.

Procedure



B.3 DELPH Nav Extractor This tool allows the extraction of the navigation data present in a XTF file.

Figure 55 – DELPH Nav Extractor Icon

Command: DELPHNavExtractor [-out output][-force true|false][-format

NAV|CSV|SCSV][-header true|false][-from ship|sensor] +speed

+heading +pitch +roll +yaw +heave +depth +altitude +layback +cable

+all

• out: path for the file to create. It can be a full file path or a file name. If not specified,

the input file with a ‘-inv’ suffix.


will be skipped, the default value is true.

• format: if set to NAV the file is a tab separated ASCII file with a .nav extension, if set

to CSV the file is a comma separated ASCII file with a .csv extension, if set to SCSV

the file is a semi-column separated ASCII file with a .scsv extension, the default value

is NAV.

• header: if set to true, a column header is added, the default value is false.

• from: defines the positioning source: if set to ship the ship position heading speed

depth are exported, if set to sensor the sensor position heading speed depth are

exported, the default value is sensor and applies only to XTF data files.

• +speed output of the ship/sensor speed data (knots)

• +heading output of the speed/sensor heading data (degrees)

• +pitch output of the sensor pitch data (degrees)

• +roll output of the sensor roll data (degrees)

• +yaw output of the sensor yaw data (degrees)

• +heave output of the sensor heave data (meters)

• +depth output of the sensor/depth depth data (meters)

• +altitude output of the sensor altitude data (meters)

• +layback output of the layback (meters)

• +cable output of the cable length value (meters)

• +kp output of the KP value

• +all output of all the above additional field data



Step Action


2. Type the command with the appropriate options.

3. Press [Enter] and wait until the end of the processing.


You can also extract the navigation from a file by dragging the file on top of the DELPH

Nav Extractor icon. The default options are then applied.

You can also use a popup menu from Windows explorer, see Figure 56.

Figure 56 – Use Popup Menu to Extract the Navigation

You can drag a whole folder over the DELPH Nav Extractor icon. The result is a

_NavLog.txt ASCII file that contains the following info for each sonar XTF file from the

folder:

File name, Ping number, Navigation X, Navigation Y, Sensor X, Sensor Y, Navigation

Date, Navigation Time, Ping Date, Ping Time, Heading, Sensor Depth, Altitude, KP

Procedure

Log



B.4 DELPH Nav Inserter - Time

The DELPH Nav Inserter - Time tool is used to merge a navigation dataset with a

geophysical dataset (sonar, seismic and magnetism). The tool provides every time

stamped data with geographic coordinates. In order to achieve this, the navigation text

data file is parsed and then interpolated to be synchronized with the geophysical dataset.

See DELPH Navigation Inserter – Time window on Figure 57.

The navigation can be imported in two different modes:

• Vessel Position: Offsets & Cable Layout are preserved and used to compute the

sensor navigation

• Sensor Position: Offsets & Cable Layout are reset and the positions come from the

sensor

A number of fields are mandatory to synchronize the Navigation File data with the pings:

• Lines to skip

• Field Separator

• Position Fields (Projected or Geographic)

• Date Field (Y/M/D)

• Time Field H:M:S.SSS

Some more optional data can be imported in the navigation insertion process:

• KP: Kilometer Point distances

• Water Depth (m): Corresponds to the complete water colum and can be gathered from

single or multi-beam sensor data

• Sensor Depth (m): Corresponds to the immersion depth of the sensor and is

commonly provided by a pressure sensor.

• Sensor Altitude (m): The altitude of the sensor above the seabed.

• Sensor Heading (°): The heading that is measured on the sensor.

• Sound Velocity (m/s): New values for the sound velocity in the water can be manually

specified or imported from the navigation file.

The synchronization between the navigation and the pings is based on the date and time

information. The ping time is commonly using the PC clock time that is synchronized to

the navigation clock time (ex: GPS time). A number of Processing options allow the fine

tuning of this synchronization to overcome most issues:

• The Import Navigation as can be set to the two possible modes Vessel Position and

Sensor Position.

• The Synchronization Mode can be set to

Timetags (XTF Only): XTF files contain an additional high resolution time tag,

based on the internal acquisition PC clock time. This data is available for both the

navigation and the pings, providing them with a common time reference basis. As

some 3rd party acquisition software do not use these fields, the time tag values

consistency must be verified using DELPH Nav Extractor utility.



Date & Time: the Time Offset to navigation time can be defined to re-adjust the

ping time to the navigation time:

- Hours: Allows an easy correction between GMT zones

- Seconds: Allows the compensation for latency between the navigation data and

the ping time.

DELPH Nav Inserter cancels the processing when the navigation data does not

completely overlap the data files time span. This protection can be turned off by

unchecking the Strict Time Span Check option. Then, any ping which time cannot be

found in the navigation data keeps its original position. Care must be taken to ensure that

the resulting navigation remains consistent. Particularly, this must not be used when

changing the navigation data type between projected and geographic coordinates.

The output from DELPH Nav Inserter is a new set of XTF or SEGY data files that contains

the corrected navigation.

When a data file has been already processed, its processed navigation is updated with the

imported data (raw file remains unchanged). Otherwise, a new set of XTF or SEGY data

files with the corrected navigation is produced.



Figure 57 - DELPH Nav Inserter window



B.5 DELPH Nav Inserter - Ping

DELPH Nav Inserter – Ping application is very similar to the DEPH NAV Inserter – Time

application. The difference is that the criterion of insertion is not the time any more but the

ping number of the data. The Ping Number is identified with the help of the Index of the

column in the data file.

The Cable Length is now present in the list of Navigation File parameters. It must be

identified as:

• Layback (from field)

• Layback (fixed value)

• Cable length (from field)

• Cable length (fixed value)

Figure 58 – DELPH Nav Inserter - Ping



B.6 DELPH Nav Inverter

This tool is designed to invert the sign of the Longitude/Easting and/or the

Latitude/Northing in a XTF file. It is a command tool.

Figure 59 – DELPH Nav Inverter Icon

Command:

DELPHNavInverter [-out output] [-force true | false] [-invertX

true | false] [-invertX true | false]

Options:

• out: Path for the file to create. It can be a full file path or a file name. If not specified,

the input file with a ‘-inv’ suffix


will be skipped. This option default is true

• invertX: Change the sign for the Easting/Latitude

• invertY: Change the sign for the Northing/Longitude

Step Action


2. Type the command with the appropriate options and the path of the file to process.



You can also invert the navigation of a file by dragging the file on top of the DELPH Nav

Inverter application icon. The default options present in the .ini file are then applied.

Editing the .ini file is possible.

Procedure



B.7 MosaicToXYZ This tool is designed to convert 3D data files into ASCII XYZ files. It is a command tool.

Figure 60 – MosaicToXYZ Application Icon

Command:

MosaicToXyz [-layer i] [-overwrite OFF] file.xmo .. file.xmo

Options:

• layer: converts layer number i

• overwrite: overwrites ON or skip OFF output file if exists (default ON)

Step Action


2. Type the command with the appropriate options.



You can also extract ASCII triplets from a 3D file by dragging the file on top of the

MosaicToXtf application icon. The default options are then applied.

B.8 MosaicToKML This tool converts DELPH mosaic files to a global geotiff file. MosaicToKML is a command

tool. Drag a GeoSections over the application icon or enter a command line with the

following attributes in the command prompt. MosaicToKml[-layer i][-overwrite OFF][-open ON] file1.xmo ..

filen.xmo

Convert file1.xmo .. filen.xmo to file1.tif .. filen.tif

• layer i: convert layer number i (default, extract all layers)

• overwrite ON: overwrite (ON) or skip (OFF) output file if exists (default is ON)

resize 100: resize output images of a given percentage

• paletteModel [gray/copper/pink/jet/cool/hot/rainbow/golden]: model for 32bits maps

• paletteRule [lin/log/cubroot/sqrroot/sqr/cub]: Color repartition for 32bits maps.

• paletteInvert ON: Invert color model for 32bits maps

• open ON: open (ON) or not (OFF) the output file with Google Earth." (default is ON).

• help: display this help message

Procedure

Usage



B.9 MosaicToTiff This tool converts DELPH mosaic files to a global geotiff file. MosaicToTiff is a command

tool. Drag a GeoSections over the application icon or enter a command line with the

following attributes in the command prompt. MosaicToTiff [-layer i] [-overwrite OFF] file1.xmo ... filen.xmo

Convert file1.xmo .. filen.xmo to file1.tif .. filen.tif

• layer i: convert layer number i (default i = 1).

• overwrite ON : overwrite (ON) or skip (OFF) output file if exists (default is ON)

• tiled: produce a tiled Tiff file (file size is smaller but this format is unusual and not well

supported by other software)

• help: display this help message

Usage



B.10 Data File Cropper DELPH Seismic is delivered with a tool that allows the cropping of seismic data files. The

tool handles the XTF and SEG formats in input. The operator can optionally apply a cable

layout on the data.

Figure 61 – Data Cropper Application Tool

Step Action

1. Click on in front of the Data File Path to browse and select the input XTF of SEG

data file.

2. Select the From Ping n° checkbox if you want to crop the beginning of the file.

3. Type in the ping number from which you want to crop.

4. Select the To Ping n° checkbox if you want to crop the beginning of the file.

5. Type in the ping number that you want to crop.

6. Click on in front of the Storage Folder to browse and select the storage folder.

7. Select which format you want in output; you have the choice between XTF and SEG.

8. Select the Modify Cable Layout and enter the layout that you want to apply on the data.

9. Click Process to run the cropping.

The output filename contains the ping numbers of the cropping.


Procedure



B.11 XTF to SEG-Y – SubBottom This application allows the conversion of seismic data files from the XTF format to SEG

format.

Figure 62 – XTF to SEGY Subbottom Converter

Step Action

1. Click on to browse and select the input folder.

2. Click on to browse and select the output folder.

3. Type in the suffix that you want to add to the converted files.

4. Select in the black display the files that you want to convert.

5. Choose to Apply Chirp Processing on Chirp Files or to Apply Heave Correction.

6. Click Process to run the conversion.


The heave correction can only be applied on processed file containing heave sensor data.

Procedure



B.12 Edgetech JSF to XTF This application allows the conversion of Edgetech .jsf data files to the XTF format.

Figure 63 – Edgetech to XTF Converter

Step Action

1. Select the Output Folder and Output File Suffix.

2. Click on Browse… and select the files to convert.

An Input File Preview is displayed.

3. Click on Start.


Procedure



B.13 DELPH SEG-Y Tools This application performs a number of operations on SEGY files:

Overwrite existing PRC files option: When processing a processed seismic profile,

changes are applied to the _PRC data file. If not, a SEGY file is produced.

Vertical Corrections: Seismic samples may be shifted from possible vertical corrections

like Tide, Static, Swell, Heave and Sensor’s Geometry.

Horizontal corrections: SEGY file pings can be reversed between the start and the end

of the file

SEGY headers: FFID can be copied to CDP Ensemble number. The output from DELPH

Nav Inserter is a new set of XTF or SEGY data files that contains the corrected navigation.

Figure 64 – DELPH SEG-Y Tools

Step Action

1. Click on Add SEG-Y Files … and select the files that you want to process.

2. Select the Vertical and Horizontal Corrections as well as the Copy FFID to CDP Ensemble option.

3. Click on Process.


Procedure



C. UNITS

Distances:

• Inch : 0.0254 meters

• Foot : 0.3048 meters

• Mile : 1609.344 meters

• Fathom : 1.8288 meters

• Yard : 0.9144 meters

• US Survey Inch : 0.02540005080010160342 meters

• US Survey Foot : 0.30480060901219241 meters

• US Survey Mile : 1609.34721869443759248 meters

• US Survey Fathom : 1.828803657607315446 meters

• Nautical Mile : 1852 meters

Speed:

• Knot: 1 Nautical Mile / 3600 second, meter /second with 1 nautical Mile = 1852 meters

Angle:

• Radian: 180 / Pi, with Pi: 3.14159265359
