复杂油藏高含水期流动单元研究及剩余油预测  

Research on Flow Unit and Prediction of Residual Oil in Complex Reservoir at the High Water-cut Stage

作　　者：李松泽[1] 胡望水[1] 

机构地区：[1]油气资源与勘探技术教育部重点实验室长江大学,湖北武汉430100

出　　处：《特种油气藏》2015年第3期121-124,157,共4页Special Oil & Gas Reservoirs

基　　金：国家自然基金"松辽盆地南部页岩油差异富集主控因素及机理"(41340030)

摘　　要：为了更准确预测复杂油藏特高含水期剩余油分布规律,以扶余油田X25-20区块为例,分析FZI法的不足,优选主控渗流参数协同约束,运用灰色理论划分方法,将流动单元划分成4类。结合生产数据,分析认为I类流动单元采出程度高,但原始含油基数大,仍是下一步开发的重点;Ⅱ、Ⅲ类流动单元分布范围大,含油饱和度降幅低,局部富集,是剩余油主要挖潜区;而IV类流动单元储存和流动特性差,不具备深度开发潜质。因此,开发中应注意封、采结合,合理开发优势流动单元,重点完善中间类型流动单元注采结构,同时兼顾劣势流动单元开发。In order to more accurately predict the distribution rules of residual oil in complex oil reservoir at the high water-cut stage,taking Block X25-20 of Fuyu Oilfield as example,the weakness of FZI has been analyzed,and synergetic constraints for the major seepage parameters are selected. On this basis,the classification approach of grey theory is adopted to divide the flow units into 4 types( I,II,III and IV). Combined with production data,the analysis indicates that the recovery degree of type I is high,however the initial oil reserves are large,which is still the major target in the future. The distribution range of types II and III is large,oil saturation decreases and oil is rich in some places,which is the major zone to produce residual oil. In contrast,the oil storage and fluidity of type IV is poor,which is not applicable to the further development. Therefore,in the process of development,isolation and production shall be both adopted and advantageous flow units shall be properly developed. The injection / production structure of flow units of the middle types shall be improved. Moreover,poor flow units shall also be developed.

关 键 词：复杂油气藏 高含水期 流动单元 剩余油 扶余油田 X25-20区块 

分 类 号：TE33[石油与天然气工程—油气田开发工程]