ASP三元复合体系在非超低界面张力下的乳化性能及其对提高采收率的影响  

Emulsifying Property of ASP System with Non-ultra-low Interfacial Tension and Its Effect on Enhanced Oil Recovery

作　　者：尚丹森 侯吉瑞[1,2,3] SHANG Dansen;HOU Jirui(Research Institute of Enhanced Oil Recovery,China University of Petroleum,Bering 102249,P R of China;Key Laboratory of Tertiary Oil Recovery,PetroChina,Beijing 102249,P R of China;PetroChina Research Institute of Petroleum Exploration ＆ Development,Beijing 100083,P R of China)

机构地区：[1]中国石油大学(北京)提高采收率研究院,北京昌平102249 [2]中石油三次采油重点实验室低渗油田提高采收率应用基础理论研究室,北京昌平102249 [3]石油工程教育部重点实验室,北京昌平100083

出　　处：《油田化学》2018年第2期322-327,共6页Oilfield Chemistry

基　　金：国家自然科学基金资助项目"ASP复合驱油藏油水界面张力变化规律及残余油启动机制研究"(项目编号51174216);国家示范工程"大庆长垣特高含水油田提高采收率示范工程"(项目编号2011ZX05052)

摘　　要：为明确碱-表面活性剂-聚合物(ASP)三元复合体系在非超低界面张力下的乳化作用及其对提高采收率的影响,以综合乳化性能指数Ie为指标,评价了5种表面活性剂的乳化性能,筛选出了一种界面张力非超低但乳化性能优良的体系,并通过平面径向流模型驱油实验研究了该体系的驱油效果。研究结果表明:所考察表面活性剂的综合乳化性能Ie由强到弱依次为OP-10、HABS(重烷基苯磺酸盐)、BS-12(十二烷基二甲基胺乙内酯)、AES(脂肪醇聚氧乙烯醚硫酸钠)和OP-4;碱质量分数为0.3%时,ASP三元复合体系综合乳化性能最优。优选的乳化性能优良的非超低界面张力ASP三元复合体系配方为:Na OH质量分数0.3%、表面活性剂(60%OP-10+40%HABS)的质量分数0.3%、聚合物(部分水解聚丙烯酰胺,相对分子量2000×104)质量浓度1500 mg/L,该体系的黏度为42.9 m Pa·s(45℃、转速6 r/min),与模拟油间的界面张力为0.0415 m N/m,综合乳化性能Ie为0.688,在驱油过程中能够扩大波及体积且可提高波及范围内的驱油效率,提高采收率效果不亚于常规超低界面张力体系。To investigate the emulsifying property of ASP system without ultra-low interfacial tension（ITT） and its effect on EOR, the emulsifying property of 5 different surfactants were calculated by using an emulsifying property index h, and an ASP system formula with good performance in emulsifying and non-ultra-low interfacial tension was screened out; the radial fluid flow flooding experiments were also conducted to investigate the oil displacement effect of the ASP system. The results showed that the L of the surfactants from strong to weak were OP-10, HABS （sodium alkylbenzene sulfonate）, BS-12 （lauryl betaine）, AES（sodium alcohol ether sulphate） and OP-4 in the same conditions, and when the alkali mass fraction was 0.3%, the ASP system had the best emulsifying property. The optimum formula of the ASP system with non-ultra-low interfacial tension was as follows, NaOH mass fraction was 0.3%, the surfactant （60%OP-10＋40%HABS） mass fraction was 0.3%, and the polymer （relative molecular weight 2000 x 104） mass concentration was 1500 mg/L. The viscosity of the system was 42.9 mPa s （45~C, 6 r/rain）, and the interracial tension between the ASP system and oil was 0.0415 mN/m, and the L was 0.688. The optimized ASP system could not only expand the swept volume, but asso improve the oil displacement efficiency during flooding process, and its effect on enhanced oil recovery was no less than that of the traditional ASP system with ultra-low-IFT.

关 键 词：ASP元复合体系 乳化性能 界面张力 三元复合驱 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]