NUCLEAR LOGGING TOOL CALIBRATION SYSTEM AND METHOD

摘要

A nuclear logging tool calibration system and method. At least some of the illustrative embodiments are methods including placing a logging tool proximate to a volume to be tested (the logging tool comprising a neutron source and a gamma detector), accumulating a spectrum of gammas by the gamma detector (the gammas created responsive to neutron irradiation of the volume by the neutron source), and then adjusting gain of a photomultiplier tube of the gamma detector. The adjusting is responsive to count rate in an overflow bin of the spectrum, where the overflow bin accumulates count rate of gammas received by the gamma detector that have energy above a predetermined energy.