Earth formation density measurement from natural gamma ray spect

Details Earth formation density measurement from natural gamma ray spect Earth formation density measurement from natural gamma ray spect

1982-09-15

1985-07-02

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250262, G01V 506

Patent

active

045270589

ABSTRACT:
Naturally occurring gamma radiations from earth formations in the vicinity of a well borehole are detected and spectrally separated into six energy regions or bands. Borehole compensation techniques are applied to the gamma ray spectra and the attenuation coefficient .eta. is determined as a result thereof. The attenuation coefficient is used along with predetermined borehole, casing and cement parameters to derive a measure of the density of the earth formations.

REFERENCES:
patent: 4436996 (1984-03-01), Arnold et al.
patent: 4439676 (1984-03-01), Smith, Jr. et al.

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