自然伽马能谱井在储层评价中的应用

由于高放射性物质可能存在于不同的岩性当中，因此，采用常规的自然伽马测井在储层解释当中可能会带来一定的误差。自然伽马能谱测井是在自然伽马测井的基础上，通过分析地层中钍、铀、钾的含量，结合钻井取心资料，准确估算泥质含量，以进行更加精确的储层分析评价。本文通过对不同岩性中放射性物质的分析，讲述高放射性储层的识别方法。以吐哈地区A井为例，讨论了自然伽马能谱测井在识别高铀储集层中的应用效果。

Application of Natural Gamma Ray Spectrometry Logs in Reservoir Evaluation

As high radioactive materials may exist in different lithologies, so when using the general natural gamma log in the exploration of reservoir, there may be some extent errors. Natural gamma ray spectrometry log is at the base of general natural gamma log, through analysing the content of Th, U, K in the stratum,combined with drilling sampling datum, well and truly estimate shale content, and carrying through more exact analysis and estima- tion of reservoir. This paper analyzes high radioactive materials in different lithologies and narrates the identification methods of high radioactive reservoir. Take well A of tuha as an example, it discusses the application effects of natural gamma ray spectrometry in reservoir of high U content identification.