渤海锦州南油田潜山上覆薄层砂岩发育区识别方法  

Identification method of thin sandstone layer development area overlying on buried hill in Jinzhou South Oilfield, Bohai Sea

作　　者：徐昱[1] 张志虎[1] 谭伟雄[1] 郭喜佳 Xu Yu;Zhang Zhihu;Tan Weixiong;Guo Xijia

机构地区：[1]中海油能源发展股份有限公司工程技术公司 [2]中海石油(中国)有限公司天津分公司

出　　处：《录井工程》2019年第3期67-72,186,187,共8页Mud Logging Engineering

摘　　要：在渤海锦州南油田花岗质潜山界面上,局部覆盖一层薄层砂岩,通过钻井发现含有一定油气储量。一方面该薄层砂岩地震识别困难,前期研究不足,资料有限;另一方面钻完井方案随砂岩是否发育而变化,使得钻井效率低风险高,无法满足地质资料获取要求。因此,有效预测或快速识别该薄层砂岩,成为解决问题的关键。在重新分析探井资料和已钻井资料基础上,初步推测薄层砂岩的成因,预测有利发育区;应用功指数模型识别钻入薄层砂岩的变化特征,建立了薄层砂岩快速识别方法。尽管薄层砂岩的成因有待进一步研究,但有利发育区与已揭露情况完全符合,对钻前预测有较好的参考价值。这种快速识别方法能够有效降低薄层砂岩识别难度,提高识别效率,为现场钻井人员提供一套切实可行的预判方法。The granite buried hill interface is partially covered with a thin layer of sandstone in Jinzhou South Oilfield,Bohai Sea,and a certain oil and gas reserves are found by drilling.On the one hand,the seismic identification of this thin sandstone is difficult,the previous research is insufficient and the data are limited.On the other hand,the drilling and completion program varies with the development of sandstone,which makes drilling efficiency low and risk high,and can not meet the requirements of geologic information acquisition.Therefore,effective prediction or rapid identification of the thin sandstone layer is the key to solve the problem.On the basis of re-analysis of exploration well data and drilled data,the genesis of thin sandstone layer was preliminarily speculated and favorable development areas were predicted.The power index model was applied to identify the variation characteristics of drilled thin sandstone layer,and a rapid identification method of thin sandstone was established.Although the genesis of thin sandstone layer needs to be further studied,the favorable development areas are in full compliance with the revealed conditions.The method has a good reference value for pre-drilling prediction,which can effectively reduce the identification difficulty of thin sandstone layer,improve the identification efficiency,and provide a practical pre-judging method for the on-site drilling personnel.

关 键 词：潜山上覆 薄层砂岩 发育区 识别 

分 类 号：TE132.1[石油与天然气工程—油气勘探]