降低CO_(2)-原油最小混相压力的助混剂研究进展  

Research progress of assistants for reducing CO_(2)-crude oil minimum miscible pressure

作　　者：郭平[1] 张万博 JIA Na 陈馥[3] 刘煌[1] 汪周华[1] 葛性波[3] GUO Ping;ZHANG Wanbo;JIA Na;CHEN Fu;LIU Huang;WANG Zhouhua;GE Xingbo(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Petroleum Systems Engineering Faculty of University of Regina,Regina,Saskatchewan S4S 0A2,Canada;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]Petroleum Systems Engineering Faculty of University of Regina,Regina,Saskatchewan S4S 0A2,Canada [3]西南石油大学化学化工学院,四川成都610500

出　　处：《油气藏评价与开发》2022年第5期726-733,共8页Petroleum Reservoir Evaluation and Development

基　　金：国家自然科学基金重点项目“孔隙介质中多相多组分反应流体输运的多尺度建模与机理研究”(51836003)。

摘　　要：CO_(2)驱最小混相压力(MMP)是衡量能否达到混相驱的重要参数,因此,为提高混相驱的应用率,迫切需要降低CO_(2)与原油间的最小混相压力,而油藏中加入助混剂是降低最小混相压力的有效手段。目前助混剂按照所含元素可分为碳氟、硅氧烷、碳氢(含氧)三大类。为了降低成本,提高助混效果,应在碳氟类助混剂加入碳氢类结构,向混合型的方向发展,而碳氢类助混剂具有良好的助混效果,并且有提升的空间,关键是找到合适的亲CO_(2)结构,计算机模拟是研究微观机理,辅助结构设计的重要手段。相比于碳氟类和硅氧烷类,碳氢类助混剂的成本较低,从成本的角度看最有应用潜力。目前影响助混剂规模化应用的主要因素是成本上的限制,未来推广应用需要石油与化工从业者的密切配合,重点介绍助混剂降低MMP的机理,总结了目前已有助混剂的结构以及助混效果,分析了助混效果的影响因素,展望了助混剂设计的发展方向。The minimum miscible pressure(MMP)of CO_(2)flooding is a crucial parameter to judge whether miscible flooding is attainable.In order to reduce the application threshold of miscible flooding,the MMP between CO_(2)and crude oil needs to be reduced urgently.Adding miscible flooding assistants to oil reservoir is an effective means for minimum miscible pressure reduction.At present,according to the elements contained,the miscible flooding assistants can be divided into three categories including fluorocarbon,siloxane,and hydrocarbon(oxygenated).In order to reduce the cost and improve the MMP reduction performance,the hydrocarbon structure should be added to the fluorocarbon assistants to make the assistants develop in the direction of mixing type.The hydrocarbon assistants have sound MMP reduction performances and room for improvement.The key is to find a suitable CO_(2)-phlic structure.Computer simulation is also a vital means to study micro mechanism and assist structure designing.Compared with fluorocarbon and siloxane,the cost of hydrocarbon(oxygenated)is lower,and it has the most application potential from the prospective of cost.At present,the main factor affecting the large-scale application of miscible assistants is the limitation of cost.The promotion and application in the future needs the close cooperation of petroleum and chemical practitioners.In this paper,the mechanisms of CO_(2)miscible flooding assistants reducing MMP are introduced.The structures of existing miscible flooding assistants,MMP reduction effectiveness are summarized,and the influencing factors on MMP reduction efficiency are analyzed.The developing directions CO_(2)miscible flooding assistants designing are prospected.

关 键 词：CO_(2)混相驱 助混剂 降低MMP 表面活性剂 微观机理 

分 类 号：TE39[石油与天然气工程—油气田开发工程]