Gamma-gamma density logging method

Details Gamma-gamma density logging method Gamma-gamma density logging method

1977-10-20

1979-12-25

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, G01V 500

Patent

active

041807278

ABSTRACT:
A gamma-gamma density logging tool employs a gamma-ray source and a pair of gamma-ray detectors. A first detector receives only natural gamma rays from the formations surrounding the borehole. A second detector receives both natural gamma rays and scattered gamma rays from the formations surrounding the borehole. The count rate from the second detector is modified by the count rate of the first detector to provide for a density measurement that is corrected for the effects of natural gamma radiation from radioactive ore-bearing zones in the formations.

REFERENCES:
patent: Re24471 (1958-05-01), Herzog
patent: 3151242 (1964-09-01), Hall, Jr.
patent: 4048495 (1977-09-01), Ellis

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