Gamma-gamma density measurement system for high-pressure, high-temperature measurements

摘要

A downhole gamma ray density measurement system is described. The gamma ray density measurement system includes a pressure housing and a gamma ray source within the pressure housing. One or more detectors within the pressure housing detect gamma radiation. One or more low-attenuation inserts may be located in the pressure housing near the gamma ray source and/or one or more of the detectors. One or more high-attenuation inserts may be located in the pressure housing near the gamma ray source and/or one or more of the detectors.

主权项

1. A downhole density measurement system comprising:
a pressure housing; a gamma ray source; at least one detector within the pressure housing for detecting gamma radiation; and one or more inserts in the pressure housing within one or more cutouts in the pressure housing, wherein the one or more inserts comprises at least one low gamma ray attenuating material, and wherein the one or more cutouts do not pass entirely through a portion of the pressure housing between the borehole and the gamma ray source or between the borehole and the at least one detector.