缝洞型碳酸盐岩油藏注水驱油提高采收率研究  

Study On Enhanced Oil Recovery by Water Flooding in Fractured-Vuggy Carbonate Reservoirs

作　　者：于伟男 王卓 YU Wei-nan;WANG Zhuo(School of Petroleum Engineering,Northeast Petroleum University,Daqing 163316,China;Oil Production Team 6-1 in the Fourth Operation Area of the Second oil Production Plan of Daqing Oilfield,Daqing 163414,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163316 [2]大庆油田第二采油厂第四作业区采油6-1队,黑龙江大庆163414

出　　处：《数学的实践与认识》2020年第5期85-90,共6页Mathematics in Practice and Theory

摘　　要：Y油田为缝洞型碳酸盐岩油藏,油藏复杂的地质特征决定了其开发模式有别于常规砂岩油藏.为了有效提高Y油田采收率,利用Eclipse数值模拟软件建立了地质模型,对水平井长度、射孔间距及酸压缝长等油藏产能影响因素与转注时机、注采比以及关井时间等注采参数进行了优化.结果认为:对于Y缝洞型碳酸盐岩油藏,水平井水平段长度为500m、射孔间距为20m或酸压规模为100m时,累计产油量可达到最大值;压力降至废弃压力时进行转注,可获得最大采收率;周期注采比等于1时,周期时效与累计增油量达到最大值;关井时间为8天时,采收率提高幅度最大.Y oilfield is a fractured-vuggy carbonate reservoir.Its complex geological characteristics determine that its development model is different from that of conventional sandstone reservoirs.In order to effectively improve the recovery of Y oilfield,the Eclipse numerical simulation software was used to establish a geological model,and the injection-production parameters such as horizontal well length,perforation spacing and acid fracturing fracture length,injection-production ratio and shut-in time were optimized.The results show that for Y fracture-cave carbonate reservoir,the cumulative oil production can reach the maximum when the horizontal section length of horizontal well is 500 m,the perforation spacing is 20 m or the acid fracturing scale is 100 m;when the pressure drops to the abandoned pressure,the maximum oil recovery can be obtained by injection;when the cyclic injection-production ratio is equal to 1,the cyclic aging and cumulative oil increment can reach the maximum.When the shut-in time is 8 days,the recovery rate increases the largest.

关 键 词：碳酸盐岩油藏 缝洞型油藏 注水驱油 提高采收率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]