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a. A log of a borehole obtained through the use of gamma, neutron, or
other radioactivity logging methods.
b. The generic name for well logs whose curves derive from reactions of
atomic nuclei involving the behavior of gamma rays and/or neutrons. Except
for the natural gamma-ray log and the spectral gamma-ray log, they record
the response of rocks very near the well bore to bombardment by gamma rays
or neutrons from a source in the logging sonde. Most can be obtained in
cased, empty, or fluid-filled well bores. Varieties include: density log;
neutron log; neutron-activation log; epithermal-neutron log;
pulsed-neutron-capture log. Syn: radiation log;
nuclear log.
See also: gamma-ray well log;
spectral gamma-ray log;
neutron log.
AGI
Source:
Dictionary of Mining, Mineral, and Related Terms
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