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Applications in the Petroleum
industry
Clay mineralogy
• Kaolin polytypes;. low-high crystallinity, halloysite, dickite
• Illite polytypes;
distinguish 1M and 2M types, to help identify authigenic/detrital origin
• Fe:Mg ratio of chlorites; to identify clinochlore or chamosite
• Ammonium content in illites; an indicator of hydrocarbon migration
and organic maturity
• Illite/smectite ratios; gives information on temperature
history
• Smectite discrimination; identify Fe, Mg and Al types
• Total Clay Content
Stratigraphic logging
• Variations in mineral distribution can improve well to well
correlation through better definition of sedimentary sequences.
Carbonate identification
• Differentiate dolomite, calcite, aragonite and siderite.
Well site mineralogy studies
• Mineral logging of cuttings in near real-time.
Formation damage assessment
• Identify scale, drilling mud invasion, reactive minerals.
Hydrocarbon detection
• Identify and characterise hydrocarbon type - to indicate
conditions of deposition and thermal maturity.
Facies mapping
• Identify subtle changes in facies
• Discriminate provenance of reservoir sands
Hydrates
• Map hydrate signatures in new and old core
Fracture infill
• Determine the infill mineralogy for improved permeability
estimation
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