复杂断块油藏剩余油再富集实验及评价研究  

Experiments and evaluation on remaining oil re-enrichment in complex fault block reservoirs

作　　者：张顺康[1] 刘炳官[2] 尤启东[3] 林波[1] 孙东升[1] 金勇[3] ZHANG Shunkang;LIU Bingguan;YOU Qidong;LIN Bo;SUN Dongsheng;JIN Yong(Exploration and Development Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China;Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China;Development Management Department of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China)

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,江苏扬州225009 [2]中国石化江苏油田分公司,江苏扬州225009 [3]中国石化江苏油田分公司开发管理部,江苏扬州225009

出　　处：《复杂油气藏》2024年第3期309-316,共8页Complex Hydrocarbon Reservoirs

基　　金：中国石化科技攻关项目“江苏低品位储量提高采收率技术研究”(P21082)。

摘　　要：为研究复杂断块油藏高含水阶段剩余油再富集规律,并对再次富集以后的剩余油质量进行评价,以江苏油田厚油层油藏和窄条状油藏为基础,开展了剩余油再富集的物理模拟实验,分析了隔夹层、油井与断层距离、压力梯度等因素对剩余油再富集的影响规律。进一步以物理模拟实验结果为基础,提出了以再富集指数和动用潜力指数作为评价指标,建立了剩余油再富集质量的评价方法。评价结果表明:对于厚油层油藏和窄条状油藏来说,高压力梯度条件下的剩余油再富集指数和动用潜力指数更高,含水率下降值和提高采收率幅度更大,剩余油再富集质量更好;对于窄条状油藏来说,远离断层时剩余油再富集以后含水下降值、提高采收率幅度都高于近断层。In order to study the law of remaining oil re-enrichment during the high water-cut stage of complex fault-block reservoirs and evaluate the quality of remaining oil after re-enrichment,physical simulation experiments of remaining oil re-enrichment were conducted on thick-layer reservoirs and narrow-strip reservoirs in Jiangsu Oilfield,to analyze the influences of factors such as interlayer,distance between wells and faults,and pressure gradient on the remaining oil re-enrichment law.Based on the results of physical simulation experiments,a method for evaluating the quality of remaining oil re-enrichment was established by the reenrichment index and utilization potential index as evaluation indicators.The evaluation results indicate that for thick oil reservoirs and narrow strip reservoirs,the remaining oil re-enrichment index and utilization potential index are higher under high-pressure gradient conditions,the decrease in water content and the increase in oil recovery are larger,and the quality of remaining oil re-enrichment is better.For narrow strip reservoirs,when the remaining oil is re-enriched far away from the fault,the decrease in water cut and increase in oil recovery is higher than that of the near-fault.

关 键 词：复杂断块 剩余油 再富集 实验 规律 

分 类 号：TE327[石油与天然气工程—油气田开发工程]