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在已下套管的井中，如何直接寻找油层，确定储集层中的含油枪和度或者水淹程度等，一直是测井工作者长期以来的研究课题。文章向读者介绍一种测上述井况的仪器ＣＯＰＪ－Ｂ型碳氧比能谱测井仪。该仪器在ＡＴＬＡＳ２７２７碳氧比能谱测井仪的基础上研制，增加了全自动闭环稳谱功能。使曲线的质量大大提高，并减轻了操作员在测井时的压力。
How to directly look for oil reservoirs, determine the degree of oil guns in reservoirs and the degree of water flooding has always been a long-term research topic among well-logging workers. This article introduces the reader to a COPJ-B C / O logging tool that measures these well conditions. The instrument was developed on the basis of the ATLAS2727 C / O logging tool and added the function of automatic closed-loop steady-state spectroscopy. The quality of the curve is greatly enhanced and the operator’s stress on logging is reduced.