低渗透高矿度油藏二元驱可行性实验研究  

An experiment study on polymer-surfactant flooding for low permeability&high salt reservoir

作　　者：王丽莉[1,2] 武平仓[1,2] 刘蕾[1,2] 杜朝锋[1,2] 徐飞艳[1,2] 范伟[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《石油化工应用》2013年第7期49-52,共4页Petrochemical Industry Application

摘　　要：陇东侏罗系油藏,目前进入中高含水期,水驱增油难度大。通过研究低渗透油藏孔喉与聚合物分子匹配性,高矿化度注入水配二元体系增粘性、界面张力、岩心驱油效率等,评价低渗透高矿化度油藏储层特性对二元驱的适应性。实验结果表明二元体系具有较好的增粘性,可注入性较好,能形成超低油水界面张力,室内岩心驱油效率提高15%以上。室内实验研究表明选择与孔喉匹配的抗盐聚合物,与新型甜菜碱形成的二元体系在低渗透高矿化度油藏较高渗透率的区块开展驱油试验可行。For the moment Jurassic reservoir is the high water cut stage in the eastern Gansu region, water flooding is difficult to increase the amount of oil .Through choosing polymer molecules for pore throat of low permeability reservoir ,and study viscosity of polymer-surfactant with high salinity water ,interfacial tension, oil displacement experiment of low permeability cores, to evaluate the adaptability of low permeabilityhgh salt reservoir character with polymer-surfactant flooding.The experiments show polymer-surfactant system has better viscosity , can be injected into the well too,and form ultra low interfacial tension with oil. In the laboratory oil displacement efficiency of core increases greater than 15 %.Experimental result show that selecting suitable polymer,polymer-surfactant flooding is suitable for higher permeability block of low permeabilitysigh salt reservoir.

关 键 词：水驱 低渗透油藏 聚表二元驱 超低界面张力 驱油效率 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]