Epithermal neutron die-away logging

Details Epithermal neutron die-away logging Epithermal neutron die-away logging

1984-07-19

1986-05-20

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, 250390, G01V 510

Patent

active

045903700

ABSTRACT:
A borehole logging tool includes a pulsed source of fast neutrons and a neutron sensitive counter. A neutron filter encases the counter and has a thickness to permit the longest possible delay time following each burst of fast neutrons before epithermal neutrons from the irradiated formation are detected by the neutron counter while at the same time minimizing thermal neutron effects.

REFERENCES:
patent: 3264477 (1966-08-01), Hall, Jr.
patent: 4097737 (1978-06-01), Mills, Jr.
patent: 4241253 (1980-12-01), Allen et al.
patent: 4516028 (1985-05-01), Riggan

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