Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1990-11-13
1992-02-04
Berman, Jack I.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250270, 364422, G01V 510
Patent
active
050862243
ABSTRACT:
A method for the determination of petrophysical characteristics of earth formation surrounding a borehole, comprising detecting gamma rays or neutrons representative of the formations and forming therefrom a set of detected data "U" which is then expressed as a function of the unknown characteristics "Y", and of a set of response data "S", representative of the conditions under which the detecting step is performed; and wherein "Y" is expressed as r=R Y, where "r" represents prior information independent from the detected data and obtained from other sources, and "R" indicates a set of relationships between at least part of the unknown characteristics. The detected data and response data are e.g. in the form of spectra, and the method may further include irradiating the formation with neutrons or gama rays.
REFERENCES:
patent: 4390783 (1983-06-01), Grau
patent: 4464569 (1984-08-01), Flaum
patent: 4937446 (1990-06-01), McKeon et al.
Evans Michael L.
Roscoe Bradley A.
Berman Jack I.
Garrana Henry N.
Hanig Richard
Schlumberger Technology Corporation
Wagret Frederic C.
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