侧积夹层控制下厚油层内剩余油分布特征及挖潜机理  

Distribution Characteristics and Exploitation Mechanism of Remaining Oil Controlled by Interlayer in the Different Position of Thick Oil Layer

作　　者：周亚洲[1,2] 杨文斌 殷代印[1,2] ZHOU Ya-zhou;YANG Wen-bin;YIN Dai-yin(Department of Petroleum Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Key Laboratory of Enhanced Oil Recovery of Ministry of Education(Northeast Petroleum University),Daqing Heilongjiang 163318,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]提高油气采收率教育部重点实验室(东北石油大学),黑龙江大庆163318

出　　处：《当代化工》2023年第8期1899-1902,1979,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金(项目编号:12002083);黑龙江省博士后经费项目(项目编号:LBH-Z21124)。

摘　　要：针对含侧积夹层厚油层层内动用差异大、剩余油难以挖潜的问题,采用油藏数值模拟方法,建立精确表征侧积夹层空间分布、走向的地质模型,通过开发指标历史拟合校正油藏物性参数,分析夹层控制下厚油层层内动用差异状况,定量表征油层不同部位剩余油分布特征,进行能够建立有效驱替体系的注采井网优化,研究不同注采井网剩余油挖潜机理。结果表明:含侧积夹层厚油层水驱后层内动用差异大,底部油层比顶部油层采出程度高23.21%,侧积夹层控制的中上部油层剩余储量占比为73.34%,采用水平井注采井网,水平井垂直于侧积夹层的布井方式,并结合三元复合驱方法,能够有效挖潜侧积夹层控制下的剩余油,能够比直井三元复合驱提高采收率5.95%。本文的研究对于高含水油田厚油层剩余油挖潜具有一定的指导意义。For the thick oil layer with interlayer,the development effect is quite different in the different position of the layer,and the remaining oil is difficult to exploit.In this paper,the numerical simulation was adopted,and the geological model representing side interlayer space distribution,direction was established.The reservoir physical parameters were corrected by the history matching.The development effect difference was analyzed at different position of the thick layer,and the remaining oil distribution features were analyzed.The optimization of injection production well patterns to establish effective displacement system was carried out,the mechanism for remaining oil exploitation was analyzed in different well patterns.The results showed that the development effect was quite different in the different position of the thick oil layer,the recovery degree of the bottom oil layer was 23.21% higher than the top oil layer.The proportion of the remaining oil that controlled by interlayer was 73.34% in the middle and upper oil layer.The horizontal wells injection and production pattern and the alkaline/surfactant/polymer(ASP)flooding could effectively exploit the remaining oil under the control of interlayer,and the horizontal well was perpendicular to the interlayer.It could increase the recovery factor by 5.95% compared with the ASP flooding of vertical wells injection and production pattern.The research of this paper has a certain guiding significance for the exploitation of remaining oil in thick reservoir of high water cut oil field.

关 键 词：侧积夹层 厚油层 层内剩余油 水平井 挖潜机理 

分 类 号：TE323[石油与天然气工程—油气田开发工程]