Epithermal neutron porosity measurement

Details Epithermal neutron porosity measurement Epithermal neutron porosity measurement

1983-10-24

1987-01-20

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250262, G01V 510

Patent

active

046381619

ABSTRACT:
Earth formations penetrated by a borehole are irradiated with pulses of fast neutrons. The epithermal neutrons resulting from moderation of the fast neutrons are detected in a plurality of time intervals to determine the porosity of the adjacent earth formations independently of lithology. Statistical results are improved by taking the ratio of the count rate during build-up of the epithermal neutron population to the count rate during die-away.

REFERENCES:
patent: 3487211 (1969-12-01), Youmans
patent: 4097737 (1978-06-01), Mills, Jr.

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