Methods and apparatus for constituent analysis of earth formatio

Details Methods and apparatus for constituent analysis of earth formatio Methods and apparatus for constituent analysis of earth formatio

1980-09-15

1983-07-19

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, 250270, G01V 500

Patent

active

043945740

ABSTRACT:
The composition of a geological formation traversed by a borehole is investigated by measuring an energy spectrum of the radiation within the borehole. The measured spectrum is thereafter analyzed by comparing it with a composite spectrum, made up of standard spectra of constituents postulated to comprise the formation-borehole system. As a result of such analysis, the proportions of the postulated constituents in the formation are determined. Where the measured spectrum is subject to degradation due to changes in the resolution of the detector, a filtering arrangement effects modification of the standard spectra in a manner which provides for a more accurate determination of the constituents of the borehole-formation system.

REFERENCES:
patent: 3521064 (1970-07-01), Moran et al.
patent: 3842265 (1974-10-01), Pitts, Jr.

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