1 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Sensa Fiber Optic Distributed TemperatureMonitoring for Gas Lift Systems Optimization

Tommy White & Vinicius CarvalhoFebruary 24, 2005

2 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Schlumberger 2005

Sensa*, a Schlumberger company

All interpretations are based on inferences from fiber optic temperature and other measured data and Sensa does not accept liability for the accuracy of any interpretation or the outcome of any work undertaken based on any interpretation performed by Sensa.

* Mark of Schlumberger

3 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Agenda

What will you get from using Sensa DTS

system?

How do you run it?

How does it work?

Case studies

Review & discuss

4 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

SensaLine : SlickLine with Fiber Optics

Memory Pressure

gauge

SensaLine

Gas Lift Mandrels

5 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Sensa Optical Sensors in Your Well

Distributed Temperature Measurement

No Downhole Electronics:

Immune to EMI + Shock + Vibration

Extremely Small: 250 microns (with coating)

High Reliability, Accuracy & Resolution

Multiplexing Capabilities + Pumpable System

6 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Incident Laser Light

Backscattered Light

Laser Source

ReceiverReceiver

Directional CouplerDirectional Coupler

Fiber Optics CableFiber Optics Cable

Backscattered LightBackscattered Light(for every meter of the fibre optics)(for every meter of the fibre optics)

DTS System

Incident LightIncident Light

Rayleigh BandRayleigh BandBrillouinBrillouin LinesLines

WavelengthWavelength

AntiAnti--Stokes Stokes Raman BandRaman Band

StokesStokesRaman BandRaman Band

TT

Not Temperature Not Temperature sensitivesensitive

Temperature Temperature sensitivesensitive

The Distributed Temperature Sensing Measurement

7 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

SensaLine : SlickLine with Fiber Optics

8 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

SensaLine : SlickLine with Fiber Optics

9 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

GLOW: Gas Lift Optimization and Leak detection at Wellsite

10 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Review: Optimization of your Gas Lift Systems with SensaLine

Real-time visual action of all GLVs

Problem identification & immediate rectification

Ability to monitor simultaneously the Reservoir + GLVs

Instant confirmation of success

Continued performance monitoring

11 ASME/API/ISO Spring 2005 Gas Lift WorkshopVC, Feb 24-25, 2005

Schlumberger Private

Questions/Discussion

Sensa Fiber Optic Distributed Temperature Monitoring for Gas Lift systems

Optimization

Gas Lift System functionality

Completion integrity

Zonal flow contribution

AgendaGLOW: Gas Lift Optimization and Leak detection at WellsiteReview: Optimization of your Gas Lift Systems with SensaLineQuestions/Discussion