高放射性碳酸盐岩储层评价技术及其应用

The Application of Reservoir Evaluation Technology in High Radioactivity Cabonated Rock

白运台¹ 陈汉林² 杜淑艳² 王杰堂² 秦　空²

1.中原石油勘探局勘探开发项目经理部，2.中原石油勘探局测井公司

Well Logging Company , Zhongyuan Petroleum Exploration Bureau, SINOPEC, Henan 457001 , P. R. China

在碳酸盐岩地层中,利用自然伽马能谱测井评价高放射性储层是一种新方法。该方法运用自然伽马能谱测井中的无铀伽马,来计算地层的泥质含量,进而确定地层的岩性剖面,并划分出地层的储集层。通过在云南楚雄盆地碳酸盐岩地层秧1 井的应用,取得了良好的实用效果,为在高放射性碳酸盐岩地层中,寻找油气储层提供了一种有效的方法。该方法不但在因地层水的运动引起的在渗透性地层产生的高放射性中应用是有效的,而且在注水驱油的老油田、老区块的勘探开发中,同样有着重要的意义和使用价值。

In this paper ,a new method of calculating shale content by natural gamma ray without uranium of NGS log , determining lithology profile and dividing reservoir is introduced to evaluate high radioactivity reservoir in carbonate rock formation. The application of this method in carbonate rock formation of YANG 1 well in YUNNAN CHUXONG basin has received a good result ,and it provides a effective method for finding hydrocarbon reservoir in high radioactivity carbonate rock formation. This method is not only effective in the application of high radioactivity in permeable strata as a result of formation water movement , but also has significance and application value in the exploration and development of water injection oil displacement in old oilfields and old blocks.