WATER SATURATION DETERMINATION USING AN OXYGEN ESTIMATE AND FORMATION LITHOLOGY

WATER SATURATION DETERMINATION USING AN OXYGEN ESTIMATE AND FORMATION LITHOLOGY

Borehole logging methods for estimating a parameter of interest using nuclear radiation. Methods include estimating a water saturation of the formation from gamma radiation from at least the formation detected in the borehole using a radiation detector, the gamma radiation responsive to a pulsed neu...

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Hauptverfasser: Bruner, DECEASED, Michael W, Inanc, Feyzi, Ansari, Rafay Zahid, Chace, David M, Gilchrist, W. Allen
Format: Patent
Sprache:eng
Schlagworte:
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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creator Bruner, DECEASED, Michael W
Inanc, Feyzi
Ansari, Rafay Zahid
Chace, David M
Gilchrist, W. Allen
description Borehole logging methods for estimating a parameter of interest using nuclear radiation. Methods include estimating a water saturation of the formation from gamma radiation from at least the formation detected in the borehole using a radiation detector, the gamma radiation responsive to a pulsed neutron source and resulting from at least one of: (i) decay of nitrogen-16 formed by activation of oxygen-16, and ii) inelastic scattering of neutrons from oxygen. This may include using at least one processor to: obtain a gamma ray count measurement, representing gamma rays from one of: (i) the decay of nitrogen-16 (ii) and the inelastic scattering, and estimate the water saturation using the gamma ray count measurement and a model comprising a relationship between measured gamma ray counts and modeled gamma ray counts from each of a fully water saturated formation and a minimally water saturated formation.
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subjects DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
title WATER SATURATION DETERMINATION USING AN OXYGEN ESTIMATE AND FORMATION LITHOLOGY
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