2.1 quantitative mineralogy while drilling geoservices · quantitative mineralogy while drilling...
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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
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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
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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)
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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
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High Resolution Video Microscope - Micrography Log
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NMR on cuttings
• Designed to determine moveable fluid volume
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GR on cuttings
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XRD
• Each Mineral diffracts X-Rays differently creating a unique diffraction pattern
• Moreover, the signal produced is relatable to the proportion of that mineral
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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
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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
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Quantitative Mineralogy – The Benefits
Formation 1
Formation 2
Formation 3
Formation 4
XRD Gamma Ray XRF
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Quantitative Mineralogy – The Benefits
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Quantitative Mineralogy – The Benefits
Today:
Tomorrow:
In a contracting labormarket with higheroperating costs, usingtechnology to augmentexisting resources willincrease operationalefficiency
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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