Fremgangsmåte for porösitetslogging med hjelp av pulset nöytronkilde

Fremgangsmåte for porösitetslogging med hjelp av pulset nöytronkilde

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 o...

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Hauptverfasser: STROMSWOLD, DAVID CHARLES, MILLS JR., WILLIAM RAYMOND
Format: Patent
Sprache:nor
Schlagworte:
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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creator STROMSWOLD, DAVID CHARLES
MILLS JR., WILLIAM RAYMOND
description 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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subjects DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
title Fremgangsmåte for porösitetslogging med hjelp av pulset nöytronkilde
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