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Method for in situ evaluation of the source rock potential of earth formations

Patent ·
OSTI ID:5082340
; ;
A technique for the in situ evaluation of the organic carbon content of earth formations penetrated by a well borehole is disclosed. The energy spectrum of natural gamma radiation occurring in earth formations penetrated by a well borehole is observed in energy regions corresponding to uranium, potassium and thorium. Quantitative evaluations of the relative abundances of these elements are made by comparing the observed spectra with standard gamma ray spectra. The relative abundances of these elements may then be interpreted in terms of the organic carbon content of earth formations by comparison with predetermined relationships found to exist therebetween.
Assignee:
Texaco Inc.
Patent Number(s):
US 4071755
OSTI ID:
5082340
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ABUNDANCE
BOREHOLES
CAVITIES
ELECTROMAGNETIC RADIATION
GAMMA LOGGING
GAMMA RADIATION
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
HYDROCARBONS
IONIZING RADIATIONS
ORGANIC COMPOUNDS
PETROLEUM DEPOSITS
RADIATIONS
RADIOACTIVITY LOGGING
RESERVOIR ROCK
RESOURCES
ROCKS
WELL LOGGING