动静结合方法计算储层水淹后地层混合液电阻率技术及其在剩余油饱和度解释中的应用--以吉林扶余油田泉四段油层为例  

A new technique of the determination of mixed fluid resistivity in water flooded formation by combining dynamic and static information and its application to well logging interpretation of residual oil saturation:an example from Quan 4 formation of Fuyu o

作　　者：高兴军[1] 宋新民[1] 褚人杰[1] 马文龙[2] 邢野[2] 赵世新[3] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]吉林油田扶余采油厂,吉林松原138000 [3]吉林油田研究院,吉林松原138000

出　　处：《地学前缘》2008年第1期160-168,共9页Earth Science Frontiers

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目“中低孔渗砂岩油藏水淹层剩余油饱和度测井基础研究”(040135-3-1);中国石油勘探开发研究院石油科技中青年创新基金“陆相非均质油田水淹层测井响应机理及水淹程度的判别”(2005-12-B)

摘　　要：针对国内注水开发油田水淹层测井解释中地层混合液电阻率(Rz)难以确定的问题,提出了一套动静结合确定Rz的新技术。该技术以开发井投产初期含水率资料为基础,结合静态研究成果,反演投产层的地层混合液电阻率(Rz),进而标定井筒中泥浆滤液电阻率(Rmf),在此基础上,应用自然电位测井的基本原理,可以计算垂向上各层的地层混合液电阻率(Rz)。对于初期投产层为单层和多层两种情况,提出了一种迭代算法,均能实现Rz的反演和Rmf的准确标定。以该技术为基础,针对已经进入高含水阶段的扶余油田泉四段油层开展水淹层测井资料的二次解释。通过与密闭取心检查井岩心分析数据对比,剩余油饱和度误差平均为6%。For the water flooded oil field, the well log interpretation of water flooded formation is very important. The mixed fluid resistivity in water flooded formation （Rz） is a key interpretation parameter that is difficult to be determined. This paper presents a new technique for computing Rz by combining the dynamic and static data. This technique utilizes the water content data of production well at initial stages and inverses them to get the mixed fluid resistivity, and then calibrates the resistivity of mud filtrate （Red） in the borehole. Based on the result from above mentioned process and utilizing the basic theory of spontaneous potential log, we can determine the mixed fluid resistivity of all zones in the vertical profile of the well. By using an iterative algorithm, this technique can be applied to the cases that the production zone at initial stage is either a single-layer or multi-layers. As an example, this technique was applied to the Quan 4 formation of Fuyu oilfield that has entered the high water-cut stage. The well log data in water flooded formation in this area was re-interpreted for residual oil saturation. The computed oil saturation was compared with the sealed coring analysis data and the average error of saturation is 6%.

关 键 词：水淹层 地层混合液电阻率 剩余油饱和度 初期投产含水率 自然电位测井 泉4段 扶余油田 

分 类 号：TE155[石油与天然气工程—油气勘探]