注水断块油田水平井开采剩余油数值模拟  

NUMERICAL SIMULATION OF REMAINING OIL WITH HORIZONTAL WELL IN A WATERFLOODING FAULT-BLOCK OILFIELD

作　　者：何鲁平[1] 陈素珍[1] 俞启泰[1] 

机构地区：[1]石油天然气总公司勘探开发科学研究院

出　　处：《新疆石油地质》1996年第1期50-55,共6页Xinjiang Petroleum Geology

摘　　要：应用多功能模型，对用直井注水开发的断块油田改用水平井开采剩余油效果进行了油藏数值模拟。采用正交设计确定了影响因素的组合与计算方案的数目，研究结果表明，水平井布在靠近直升生产井而远离直升注水井时，开采剩余油的效果最好。原油粘度、水平井在平而上的位置、水平井在油层中的垂向位置、油水相对渗透率曲线类型、水平渗透率与垂直渗透率的比值对水平井开采剩余油的效果有明显的影响。在给定的模型条件下，当直井含水率在９０％以上时改用水平井开发，从开采时间和采收率综合衡量是比较有利的，这种研究方法与经济分析结合起来，可对用水平井开采断块油田剩余油作出可行性评价。”；若Ｆ０．０ｓ＜Ｆ＜Ｆ０．０１说明该因素位级的改变对计算结果影响显著，记为“＊”；若Ｆ＜Ｆ０．０１，说明该因素位级的改变对计算结果没有多大影响，记为空白。从表２和表３可以看出，对ＥａＲｖ来说，Ｋｒ、μ０、Ｋｈ／Ｋｖ的改变对结果有特别显著的影响；根据Ｆ值的大小可确定它们对ＥＲｖ，和ＥＲｈｖ的影响顺序。对ＥＲｖ的影响顺序是：μ、Ｋｒ、和Ｋｈ／Ｋｖ，对ＥＲｈｖ影响的顺序是：μ０，ａ，ｈｐ，Ｋｒ和Ｋｈ／Ｋｖ。表２ＥＲｖ的方差分析结果Ｔａｂｌｅ２Ｖａｒｉａｎｃｅａｎａｌｖｓｉｓｏｆ?Numerical simulation of production results of remaining oil with a horizontal well was conducted with multifunction models in a fault-block oilfield with waterflooding vertical wells.Combination of factor and the number of calculation plans were determined with orthogonal design.Results showed that optimized production can be obtained when horizontal well is near the vertical producer and far from vertical injector;oil viscosity,plane location of horizontal well,vertical location of horizontal well in reservoir,typeof oil-water relative permeability curve and the ratio of horizontal and vertical permeability distinctly affected the production results.In a given model condition,horizontal well prevails over vertical well in terms of production time and recovery factor when watercut in a vertical well is over 90%.Feasibility study on production of remaining oil with horizontal wells in a fault-block oilfield can be made by combining this method with economic analysls.

关 键 词：数值模拟 水平井 断块油气藏 开采 剩余油 

分 类 号：TE346[石油与天然气工程—油气田开发工程]