致密砂岩裂缝油藏渗吸机理及规律研究进展  

Research Progress of the Mechanism and Law of Imbibition in Tight Fractured Sandstone Reservoirs

作　　者：曾德尚 陈新阳 裴向阳 戴湄 ZENG De-shang;CHEN Xin-yang;PEI Xiang-yang;DAI Mei(College of Petroleum Engineering,Yangtze University,Wuhan Hubei 430100,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430100

出　　处：《辽宁化工》2020年第11期1433-1437,共5页Liaoning Chemical Industry

基　　金：长江大学第十二批大学生创新创业训练计划项目(项目编号:2019295)。

摘　　要：致密砂岩裂缝油藏具有致密、孔隙结构复杂、天然裂缝发育等特征,衰竭开采存在产量递减快、能量补充困难的问题,基质赋存大量剩余油未动用,采出程度低。渗吸采油是改善致密砂岩裂缝油藏开发效果的重要方式。然而,渗吸过程存在机理不明确、规律认识复杂多样的问题。因此,深入研究渗吸驱油机理和明确其渗吸规律,对于提高致密砂岩裂缝油藏采收率具有重要意义。综述了致密砂岩裂缝油藏渗吸类型及其判别方法,运用体积法、质量法、核磁共振法及CT扫描法的渗吸机理研究手段,概括了岩石渗透率、油水界面张力和润湿性对渗吸规律的影响。在分析当前国内研究进展的基础上,提出了下一步致密砂岩裂缝油藏渗吸研究的方向。Fractured tight sandstone reservoirs have the characteristics of tightness,complex pore structure and development of natural fractures.Depleted production has the problems of rapid decline in production and difficulty in energy supplementation.The matrix has a large amount of remaining oil that has not been used,and the degree of recovery is low.The imbibition oil recovery is an important way to improve the development effect of tight fractured sandstone reservoirs.However,the imbibition process has the problems of unclear mechanism and complex and diverse rules.Therefore,in-depth study of imbibition displacement mechanism and clarification of imbibition law is really important for improving the recovery factor of tight sandstone fractured reservoirs.In this paper,the types and identification methods of imbibition in tight fractured sandstone reservoirs were summarized.Volumetric method,mass method,nuclear magnetic resonance method and CT scanning method were used to study the imbibition mechanism.And the effect of rock permeability,oil-water interfacial tension and wettability on the imbibition law was summarized.Based on the analysis of the current domestic research progress,the direction of the next study on the imbibition of tight sandstone fractured reservoirs was proposed.

关 键 词：致密砂岩 渗吸机理 渗吸规律 研究进展 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]