In situ lithology determination

Details In situ lithology determination In situ lithology determination

1982-04-16

1984-10-02

Howell, Janice A.

Radiant energy

Coded record and readers; invisible radiant energy type

G01V 500

Patent

active

044750382

ABSTRACT:
A method for enhancing neutron induced gamma ray logging records includes generating a baseline signal which represents compton scattering noise and obtaining a difference signal by subtracting the baseline signal from the data signal. The noise reduced difference signal is calibrated to obtain abundances of elements in a rock formation. A lithology is determined by in situ measurement by using the noise reduced logging records to obtain abundances of individual elements which are used to correct water saturation and porosity and obtain mineral compositions.

REFERENCES:
patent: 2830185 (1958-04-01), Scherbatskoy
patent: 3294972 (1966-12-01), Youmans
patent: 3925659 (1975-12-01), Paap et al.
patent: 4390783 (1983-06-01), Grau
patent: 4394574 (1983-07-01), Grau et al.

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