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Pulsed neutron combination well-logging system. [hydrogen-to-oxygen ratio, chlorine content, and thermal neutron lifetimes]

Patent ·
OSTI ID:7148104
The hydrogen-to-oxygen ratio, chlorine content, and thermal neutron lifetime information are simultaneously determined in the vicinity of a cased well bore with a pulsed neutron logging system. A downhole pulsed neutron source repetitively irradiates the borehole environs with approximately one msec 14 MeV neutron bursts. Gamma rays attributable to the capture of neutrons by elemental hydrogen, chlorine, and oxygen near the borehole are determined by inputing three time gates to a multichannel pulse height analyzer.
Assignee:
Texaco Inc.
Patent Number(s):
US 3928762
OSTI ID:
7148104
Country of Publication:
United States
Language:
English

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Related Subjects

440105 -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
440400* -- Well Logging Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
47 OTHER INSTRUMENTATION
CHLORINE
CRYOGENIC FLUIDS
ELEMENTS
EQUIPMENT
FLUIDS
HALOGENS
HYDROGEN
NEUTRON LOGGING
NEUTRON-GAMMA LOGGING
NONMETALS
OXYGEN
PULSED NEUTRON TECHNIQUES
RADIOACTIVITY LOGGING
WELL LOGGING