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1. (WO2016053350) GAIN STABILIZATION OF A NATURAL GAMMA RAY TOOL

Pub. No.:    WO/2016/053350    International Application No.:    PCT/US2014/059030
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Sat Oct 04 01:59:59 CEST 2014
IPC: E21B 47/00
G01V 5/04
G01V 5/12
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: MOAKE, Gordon L
Title: GAIN STABILIZATION OF A NATURAL GAMMA RAY TOOL
Abstract:
In some embodiments, an apparatus and a system, as well as a method and an article, may operate to receive gamma ray measurements from a gamma ray detector; to generate a spectrum based on the gamma ray measurements, the spectrum including a plurality of channels and count rates for the plurality of channels, wherein a channel number of a channel corresponds to energy values of the received gamma rays; to fit a curve to a portion of the spectrum; to determine a location of the maximum of the first derivative of the curve; and to adjust a gain of the gamma ray detector based on the location of the maximum of the first derivative of the curve. Additional apparatus, systems, and methods are disclosed.