应用“两步”法识别广利油田沙四段储层流体性质  

A fluid property identification method in Es4 reservoir of Guangli Oilfield with the "two step" method

作　　者：牛栓文 韩学辉 支乐菲 路智勇 刘荣 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,青岛266580 [2]中石化胜利油田公司东辛采油厂,东营257100 [3]中石化胜利油田东胜精攻石油开发集团股份有限公司,东营257000 [4]中国石油集团海洋工程有限公司天津分公司,塘沽300451

出　　处：《地球物理学进展》2013年第6期3117-3122,共6页Progress in Geophysics

基　　金：山东省自然科学基金项目Y2008E08资助;国家油气专项资助(2011ZX05009-003)联合资助

摘　　要：广利油田沙四段储层高、低阻油层共存,测井识别难度大.为了准确识别储层的流体性质,开发了"两步"识别方法.首先,考虑到岩性细、泥质含量高是低阻油层的主要成因,利用自然伽马相对值△GR对深探测电阻率做了泥质校正,以消除岩性对油层电阻率的影响.其次,基于生产动态资料,采用Bayes逐步判别分析方法建立了应用自然电位、自然伽马、声波时差、深探测电阻率、冲洗带电阻率资料识别油水层的判别函数.对8口新井的应用效果表明,"两步"识别法能够较好地识别高、低阻油层,流体性质识别的符合率达到了88.8%,较未经泥质校正的Bayes逐步判别分析方法识别符合率提高了8.3%,较好地满足了广利油田沙四段储层流体性质识别的需要.The coexistence of low and high resistivity oil layers in Guangli Oilfield increases the difficulty of fluid identification. In order to identify fluid property exactly, the ＂two-step＂ identification method is developed. First of all, taking into account that the rock of fine and high clay content are the main cause of low resistivity, ΔGR is used to shale correction in deep resistivity to eliminate the influence of rock formation resistivity. Secondly, based on production data, the article uses Bayes stepwise discriminant method and self potential, gamma ray, acoustic travel time, formation true resistivity, flushed zone resistivity to build discriminant functions of oil layer, oil-water layer and water layer. The application effect of 8 new wells indicates that the ＂two step＂ recognition method is better to identify high and low resistivity with the rate of 88.8%,and the rate is higher than without shale correction 8.3%,so it can meet the need of fluid property recognization in Es4 reservoir of Guangli oilfield.

关 键 词：流体性质 “两步”识别法 低阻油层 泥质校正 Bayes逐步判别法 

分 类 号：P631[天文地球—地质矿产勘探]