Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1985-04-10
1987-04-07
Howell, Janice A.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250261, 250262, 250264, 250265, 250270, G01V 510
Patent
active
046563547
ABSTRACT:
A generalized computer-based system and method for acquisition of nuclear well logging data. A feature of the present invention is the ability to provide time distribution spectra over the entire interval between source firings, such spectra including the gamma radiation produced from both the inelastic scattering and capture of neutrons from said neutron source. The spectra so generated may be analyzed and processed to derive parameters indicative of formation and borehole conditions, for example, a parameter sensitive to borehole geometry and a parameter sensitive to porosity. Certain parameters may be compared as an indication of the presence of gas in a fluid filled formation. Still further, a quantitative measure of the repeatability of the macroscopic thermal neutron absorption capture cross-section may be derived and used to control the weight of the capture cross-section filter.
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Dresser Industries Inc.
Hannaher Constantine
Howell Janice A.
McCollum Patrick H.
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