二氧化碳混相与非混相驱油技术研究进展  

Research Progress of Miscible and Immiscible Carbon Dioxide Flooding

作　　者：龙冕[1] 齐桂雪 冯超林 

机构地区：[1]中国石化中原油田分公司天然气处理厂,河南濮阳457001 [2]中国石化中原油田分公司勘探开发研究院,河南濮阳457001 [3]成都理工大学,四川成都610059

出　　处：《中外能源》2018年第2期18-26,共9页Sino-Global Energy

基　　金：“十三五”国家重大专项(编号:2016ZX05017001);河南省博士后基金(编号:P2013070)联合资助

摘　　要：二氧化碳资源化利用技术主要集中于二氧化碳采油采气技术。二氧化碳驱油技术研究包括二氧化碳气驱、二氧化碳泡沫流度控制、含少量杂质的二氧化碳驱、气水交替驱等。从最小混相压力来看,二氧化碳驱分为混相驱与非混相驱,我国大部分油藏属于陆相沉积,二氧化碳驱的最小混相压力较高,因此非混相驱油藏占比较大。国内外降低二氧化碳驱最小混相压力的技术主要有加入混相共溶剂、含氟化合物、油溶性表面活性剂、非离子表面活性剂、超临界微乳液以及形成有利于驱油的二氧化碳泡沫体系,从而实现具有高驱油效率的二氧化碳混相驱。对中国而言,开展降低最小混相压力、扩大二氧化碳混相驱和近混相驱的应用范围研究,可以防止二氧化碳沿高渗层、大孔道窜逸,启动低渗储层,有助于实现二氧化碳效益驱油及地质封存,增强我国应对气候变化的国际影响力。Technology for CO_2 resource utilization focuses on that of oil and gas recovery by the CO_2.Technologies of CO_2 flooding includes CO_2 gas flooding,CO_2 foam flow control,flooding by CO_2 with small amount of impurity,water alternating gas flooding,etc.According to the minimum miscible pressure,CO_2 flooding may be divided into miscible flooding and immiscible flooding.Most of the oil reservoirs in our country belong to continental sedimentation,and the minimum miscible pressure of CO_2 flooding is too high to miscible.Technologies for reducing the minimum miscible pressure of CO_2 flooding mainly consist of adding miscible solvent,fluorinated compounds,oil-soluble surfactant,nonionic surfactant,supercritical micro-emulsion and forming CO_2 foam system（that is favorable to oil displacement）.And then miscible CO_2 flooding with high efficiency of oil displacement may be achieved.In China,reducing the minimum miscible pressure and expanding the application range of CO_2 miscible or near miscible flooding can prevent CO_2 crossflow along high-permeability layer and big channel and develop the low-permeability reservoirs.It helps to realize oil displacement with benefit and geologic sequestration of CO_2.All of these can enhance Chinese international influence on responding to climate change.

关 键 词：二氧化碳驱 技术现状 最小混相压力 降低混相压力技术 

分 类 号：TE357[石油与天然气工程—油气田开发工程]