Gamma ray borehole logging method and apparatus having compensat

Details Gamma ray borehole logging method and apparatus having compensat Gamma ray borehole logging method and apparatus having compensat

1987-05-27

1989-04-25

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250262, G01V 500

Patent

active

048250716

ABSTRACT:
A method and apparatus (43) are disclosed for natural gamma ray spectral logging of a well borehole (41) to determine the abundances of uranium (U), potassium (K), and thorium (Th) gamma rays in the earth formations (46) adjacent to the borehole (41), and for compensating for borehole attenuation effects upon such gamma photons caused by scattering and absorption phenomena in the materials (42) within the borehole.

REFERENCES:
patent: 4439676 (1984-03-01), Smith, Jr. et al.
patent: 4492863 (1985-06-01), Smith, Jr.
patent: 4527058 (1985-07-01), Smith, Jr.
patent: 4542292 (1985-09-01), Ellis
patent: 4568829 (1986-02-01), Ruckebusch

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