Nuclear well logging data acquisition system and method

Abstract From the Canadian patent

A generalized computer-based system and method for acquisition of nuclear well logging data including, downhole generation of energy and time spectral information. A downhole instrument traverses a borehole introducing high energy neutrons into the formation at prescribed depths. Resultant gamma rays are detected and converted into pulses which are amplified and conditioned. For acquiring energy spectrum data a downhole, multi-parameter analyzer is provided including a pulse height analyzer and memory. The analyzer converts each gamma ray pulse height into a digital code by peak detection, level and pulse pile-up discrimination sample-and-hold, and analog-digital conversion. The digital …