Neutron logging time spectral data acquisition system and method

Patent · Tue May 26 04:00:00 EDT 1987

OSTI ID:6382968

Gray, T P; Randall, R R; Schmidt, M G

This patent describes a well logging operation. A method of continuously accumulating over discrete time intervals counts of the impingement of gamma radiation upon first and second gamma radiation detector means, comprises: cyclically energizing a neutron source for pulsatingly irradiating a subsurface earth formation; generating a sequentially incremented channel signal in response to each of the discrete time intervals following the energizing of the source; generating detection signals in response to impingement of gamma radiation upon the first and second detector means, such that the detection signals distinguish between the impingement upon the first and second detector means; correlating each of the detection signals with the channel signal. The channel signal corresponds to one of the discrete time intervals wherein the gamma radiation impinged upon the first or second detector means.

• Assignee: Dresser Industries, Inc., Dallas, TX
• Patent Number(s): US 4668863
• OSTI ID: 6382968
• Country of Publication: United States
• Language: English

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
DATA ACQUISITION SYSTEMS
ELECTROMAGNETIC RADIATION
EQUIPMENT
GAMMA RADIATION
GEOLOGIC DEPOSITS
IONIZING RADIATIONS
MEASURING INSTRUMENTS
MEMORY DEVICES
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NEUTRON LOGGING
NEUTRON SOURCES
PARTICLE SOURCES
PETROLEUM DEPOSITS
RADIATION DETECTORS
RADIATION SOURCES
RADIATIONS
RADIOACTIVITY LOGGING
RESOURCES
SIGNALS
SYNCHRONIZATION
TIME DEPENDENCE
WELL LOGGING
WELL LOGGING EQUIPMENT