水平井三元复合驱在曲流河点坝砂体的应用  

Application of Horizontal Well Alkaline-Surfactant-Polymer Flooding in Point Bar Sand in Meandering Rivers

作　　者：周亚洲[1] 殷代印[1] 张承丽[1] 

机构地区：[1]东北石油大学,黑龙江大庆163318

出　　处：《特种油气藏》2014年第3期87-89,155,共3页Special Oil & Gas Reservoirs

基　　金：国家自然基金"考虑启动压力梯度变化的低渗透油藏表面活性剂驱油数值模拟理论研究"(51074034)

摘　　要：针对杏六区东部Ⅰ块葡Ⅰ332油层中上部由于侧积夹层遮挡,剩余油开采难度大的问题,应用新井水淹资料对油层中上部剩余油进行分析,提出了水平井和三元复合驱相结合的方法,采用数值模拟方法对该区水平井与直井组合方式进行优化。结果表明,水平井注水平井采的井网组合方式开采效果最好,比直井注直井采的井网组合方式提高采收率5.95%,注入井距油层顶部h/5(h为油层厚度),采出井距油层顶部h/3能够减慢含水上升速度。矿场试验结果表明,水平井三元复合驱效果显著,截至目前采出程度为27.30%。The residue oil in middle-upper part of PU I 332 pay zone of I block in eastern Xing6 Area is hard to recover due to blocking of lateral accretion interbeds. In view of this,the watered-out data of new wells was used to analyze the residue oil distribution in middle-upper part of the pay zone,a developing mode combining horizontal well and alkaline-surfactant-polymer flooding was put forward,and the configuration of horizontal wells and vertical wells was optimized by numerical simulation. The results show that the best well pattern is horizontal injectors with horizontal producers,which has a recovery rate of 5. 95% more than the well pattern of vertical injectors with vertical producers. When the distance between the horizontal section of injectors and pay zone top is h /5,distance between the horizontal section of producer to pay zone top is h /3,water cut increase rate can be slowed down. Field test shows that alkaline-surfactant-polymer flooding in horizontal wells works well,resulting in a recovery rate of 27. 30% by far.

关 键 词：水平井 三元复合驱 杏六区东部I块 曲流河 点坝 

分 类 号：TE349[石油与天然气工程—油气田开发工程]