Simultaneous gamma ray measurement of formation bulk density and

Details Simultaneous gamma ray measurement of formation bulk density and Simultaneous gamma ray measurement of formation bulk density and

1979-08-13

1981-10-27

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250266, 250269, G01V 500

Patent

active

042975751

ABSTRACT:
A method for simultaneously measuring the formation bulk density and the thickness of casing in a cased well borehole is disclosed. Low energy gamma rays are emitted into the casing and formation in a cased borehole. Two longitudinally spaced detectors detect gamma rays scattered back into the borehole by the casing and surrounding earth materials. The count rate signals from the two detectors are appropriately combined according to predetermined relationships to produce the formation bulk density and the casing thickness, which are recorded as a function of borehole depth.

REFERENCES:
patent: 3521063 (1970-07-01), Tittman
patent: 3864569 (1975-02-01), Tittman
patent: 4047027 (1977-09-01), Bateman et al.
patent: 4048495 (1977-09-01), Ellis

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