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Epithermal neutron lifetime logging

Patent ·
OSTI ID:5845976
;

A radioactive borehole logging tool employs an epithermal neutron detector having a neutron counter surrounded by an inner thermal neutron filter and an outer thermal neutron filter. Located between the inner and outer thermal neutron filters is a neutron moderating material for extending the lifetime of epithermal neutrons to enhance the counting rate of such epithermal neutrons by the neutron counter.

Assignee:
Mobil Oil Corp.
Patent Number(s):
US 4556793
OSTI ID:
5845976
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BARYONS
COUNTING RATES
DESIGN
ELEMENTARY PARTICLES
EPITHERMAL NEUTRONS
EQUIPMENT
FERMIONS
HADRONS
LIFETIME
MEASURING INSTRUMENTS
NATURAL GAS WELLS
NEUTRON DETECTORS
NEUTRON LOGGING
NEUTRON-NEUTRON LOGGING
NEUTRONS
NUCLEONS
OIL WELLS
PERFORMANCE
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RADIOACTIVITY LOGGING
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS