致密油藏提高采收率现场试验进展和启示  

Progress and Enlightenment of EOR Field Tests in Tight Oil Reservoirs

作　　者：魏兵 张翔 刘江 蒲万芬 李一波 王晓超 WEI Bing;ZHANG Xiang;LIU Jiang;PU Wanfen;LI Yibo;WANG Xiaochao(School of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;EnerTech-Drilling&Production Co.,CNOOC Energy Technology&Services Limited,Tianjin 300452,China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《新疆石油地质》2021年第4期495-505,共11页Xinjiang Petroleum Geology

基　　金：国家自然科学基金(51974265,51804264)。

摘　　要：通过详细梳理近年来国内外致密油藏提高采收率现场实施案例,分析了各类开发方式的效果,总结了现场试验中发现的问题及得到的启示。从国内外现场试验的结果来看:注气(CO_(2)和天然气)是目前主流的开发方式;多数先导性试验取得了成功,原油采收率可提高3%~30%;实验室模型过于理想化,与现场试验效果差异较大甚至相悖;裂缝干扰和窜流导致能量波及不均衡,是部分先导性试验失败的根本原因。因此,如何协调裂缝“利用和治理”的矛盾,明确致密基质与裂缝间的“质”换机制,通过现场经验指导并优化实验室研究等是中国致密油藏开发亟待解决的关键问题。此外,应进一步优化致密油藏资源评价方法,加大对油气行业政策的扶持力度,促进致密油藏提高采收率理论与技术的跨越式发展。This paper reviews field test cases for enhancing oil recovery in tight oil reservoirs at home and abroad in recent years,analyzes the effects of various development methods,and points out the problems arising out of and the enlightenment obtained from the field tests.According to the results of field tests at home and abroad,we conclude that gas injection(CO_(2) and natural gas)is a popular development method at present;most pilot tests are successful with the oil recovery improved by 3% to 30%;the laboratory models are too ideal and quite different from or even contrary to the field test results;fracture interference and channeling result in uneven energy spread,which is the fundamental cause for the failure of some pilot tests.Therefore,how to balance“utilization and treatment”of fractures,clarify the“substantial”exchange mechanism between tight matrix and fractures,and guide and optimize laboratory research through field experience are key issues to resolve in tight oil development in China.In addition,it is necessary to further optimize the methods for tight oil resource evaluation,increase policy support to oil and gas industry and promote the leapfrog development of the theory and technology for enhancing tight oil recovery.

关 键 词：致密油藏 开发方式 提高采收率 现场试验 发展方向 

分 类 号：TE357[石油与天然气工程—油气田开发工程]