Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1989-01-10
1990-03-20
Fields, Carolyn E.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250266, 250269, G01V 510
Patent
active
049103970
ABSTRACT:
A borehole logging tool employing a pulsed neutron source and a pair of spaced-apart epithermal neutron detectors is lowered into a borehole traversing a subsurface formation. The formation is irradiated with bursts of fast neutrons and the epithermal neutrons returning to the borehole as a result of such irradiation are detected by the pair of epithermal neutron detectors. These detected epithermal neutrons are both time resolved and time integrated during their epithermal die-away spectrum to provide indications of lithology independent porosity and lithology dependent porosity respectively.
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Determination of Lithology and Porosity, chapter 12, pp. 69-75.
Mills, Jr. William R.
Stromswold David C.
Fields Carolyn E.
Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
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