日用化学工业（中英文）2025，Vol.55Issue(12)：1501-1508,8.DOI:10.3969/j.issn.2097-2806.2025.12.001
基于延展型表面活性剂的化学驱体系驱油机理研究
Study on oil displacement mechanism of chemical flooding based on extended surfactant
摘要
Abstract
The extended surfactant with high temperature resistance,salt resistance and high interfacial activity is an important oil displacement component for enhancing oil recovery in high-temperature and high-salinity reservoirs.To clarify the oil displacement mechanism of the binary compound flooding of extended surfactant and polymer in microscopic pores,the microscopic oil displacement effects of extended carboxylate surfactant(C8P15E10C),polymer and their mixed solution after formation water flooding were studied by microscopic visualization oil displacement experiment using simulated microfluidic chips,and the results were correlated with those of interfacial tension,bulk viscosity and emulsification performance.It was found that the high viscosity of the polymer effectively reduced the mobility ratio,increased the sweep region,and could peel off the residual oil through the normal stress difference generated by viscoelasticity,and thus improved the microscopic oil washing efficiency.Partially hydrolyzed polyacrylamide Baomo Ⅱ and hydrophobically modified polyacrylamide France Ⅲ could increase the oil displacement efficiency by 8.0%and 15.2%,respectively,compared with water flooding,and the remaining oil types are mainly cluster and column.The extended surfactant could reduce the oil-water interfacial tension to the order of magnitude of 10-2 mN/m,in-situ emulsify the residual oil after water flooding,effectively utilize the columnar residual oil,and thus improved the oil washing efficiency within the sweep region.Compared with water flooding,the oil displacement efficiency was further increased by 9.6%,the number of residual oil droplets was significantly increased,and the proportion of columnar residual oil area was the lowest among different types of chemical floodings.For the surfactant-polymer binary flooding system,the synergism between the thickening effect of the polymer and the interfacial tension reduction by the surfactant could not only expand the sweep region,but also effectively move the cluster remaining oil with the largest area,and thus increase the oil washing efficiency.After water flooding,the oil displacement efficiency was further increased by approximately 30%by using the binary flooding system,which was significantly better than that of either single system.关键词
延展型表面活性剂/部分水解聚丙烯酰胺/超高分多元共聚物/化学驱/驱油机理Key words
extended surfactant/partially hydrolyzed polyacrylamide/ultra-high molecular weight copolymer/chemical flooding/oil displacement mechanism分类
化学化工引用本文复制引用
石静,张磊,陈兴锋,郭淑凤,潘斌林..基于延展型表面活性剂的化学驱体系驱油机理研究[J].日用化学工业（中英文）,2025,55(12):1501-1508,8.基金项目
中国石化科技攻关项目"低渗透油藏低浓度中相微乳液驱油体系研究"(KLP25021) （KLP25021）
