Method and apparatus for natural gamma ray well logging

Details Method and apparatus for natural gamma ray well logging Method and apparatus for natural gamma ray well logging

1984-02-21

1986-09-16

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250262, G01V 506

Patent

active

046124390

ABSTRACT:
Method and apparatus for evaluating subsurface formations utilizing natural gamma radiation spectral measurements. The total counts measurement is processed to derive measurements relating to the concentrations of potassium-40, uranium and thorium. A relative concentration factor of uranium to the energy spectra is derived and the total counts measurement is compensated by the uranium factor to remove the effects of uranium.

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patent: 4542292 (1985-09-01), Ellis
Ronald Doig, "The Natural Gamma-Ray Flux: In Situ Analysis," Geophysics, vol. 33, No. 2 (Apr., 1968), p. 311-328.

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