2.1 Quantitative Mineralogy while drilling Geoservices · Quantitative Mineralogy While Drilling...

Quantitative Mineralogy While Drilling& Real Time Formation EvaluationThrough The Analysis of Cuttings

Perth, 11th September 2012

Ben Geaghan – Geoservices, Sales Engineer, AUS, PNG, NZ,Timor Leste

Advanced Mud Logging

The Problem:• No readily accessible QC of real time FE data• New Reservoirs = New Properties• Lab Testing = Time

The Solution:• Enhanced cuttings image acquisition and processing• Direct measurements on cuttings including XRD, GR, NMRand XRF

15 to 20 minutes preparation / sample / person

35 minutes from collection at shakers to update results in database

Workflow

Sampling(8 min)

Digital Pictures(3 min)

Drying(10 minutes)

Cuttingselection(6 min)

NMR(3 min)

Master logupdate(5 min)

Geologicaldescription

(2 min)

XRD(17 min)

XRF(11 min)

Petrophysical Information Log

XRD / XRF (35 mins) NMR (20 mins) Digital Image Supported Master Log (15 mins)

Gamma ray preparation(15 min)

High Resolution Video Microscope

Sampling(8 min)

Digital Pictures(3 min)

Master logupdate(5 min)

Geologicaldescription

(2 min)

1.5mm field of depth at 100x2.11 Mpixel Videox20 – x200 high perf. LensUltra high intensity light source

High Resolution Video Microscope - Micrography Log

NMR on cuttings

• Designed to determine moveable fluid volume

GR on cuttings

XRD

• Each Mineral diffracts X-Rays differently creating a unique diffraction pattern

• Moreover, the signal produced is relatable to the proportion of that mineral

XRD

• For Field Tests:

Sampling

Rate Quartz %Calcite % Dol % Siderite % Anhydrite % Illite % Montmo % Kaolinite % Tot Clay % Albite % Microcline % Tot Felds % Tot

100 48 0 0 0 0 22 0 30 52 0 0 0 100

10 110 58 0 0 0 0 25 0 17 42 0 0 0 100

Depth ftXRD Measurements

• Clay totals are validated• Continue to develop individual clay typing

XRF

• Each Element fluoresces under X-Rays differently creating a uniquediffraction pattern• Moreover, the signal produced is relatable to the proportion of that element

• Trace elements and fluid types show strong correlation

Quantitative Mineralogy – The Benefits

Formation 1

Formation 2

Formation 3

Formation 4

XRD Gamma Ray XRF

Quantitative Mineralogy – The Benefits

Quantitative Mineralogy – The Benefits

Today:

Tomorrow:

In a contracting labormarket with higheroperating costs, usingtechnology to augmentexisting resources willincrease operationalefficiency

Conclusions

• AML is not affected by hole conditions or formations• The ability to measure small specimens creates high resolution• Homogeneity evidence for technical and commercial gain• AML is proven in field trials• Operational efficiencies and resource allocation