油气地质与采收率2026，Vol.33Issue(3)：209-219,11.DOI:10.13673/j.pgre.202412038
低界面张力下乳化性能对二元复合体系驱油效率的影响
Effect of emulsification performances on oil displacement efficiency of binary composite systems at low interfacial tension
摘要
Abstract
Emulsification capability and emulsion stability significantly influence the oil displacement of binary composite systems by in-situ emulsification.However,their related mechanisms are currently not systematically understood.To address this issue,binary composite systems with significant differences in the characterization parameter of emulsification capability,namely emulsification index(EI)and that of emulsion stability,namely the emulsion stability index(SI)were selected,and microfluidic displacement experiments were conducted to clarify the influence of emulsification performance on oil displacement efficiency of these systems.The experimental results indicate that binary composite systems with strong emulsification capability(EI value of 1.459,1.462,and 1.398),regardless of the magnitude of their emulsion stability index,achieve an oil displacement efficiency increase of over 28.0%.In contrast,the binary composite system with a weak emulsification capability(EI value of 0.463)records an oil displacement efficiency increase of less than 20.0%.Both excessively high and low SI are detrimental to the oil displacement efficiency increase of binary composite systems.The binary composite system exhibiting a moderate SI coupled with strong emulsification capability yields the highest oil displacement efficiency increase of 42.4%.Clustered residual oil is the primary type of residual oil after water flooding,and its mobilization degree shows a positive correlation with the increase in oil displacement efficiency.The results indicate that for water-flooded reservoirs,the emulsification performance parameters required for binary composite systems by in-situ emulsification are strong emulsification capability and moderate emulsion stability.关键词
二元复合驱/微流控/乳化能力/乳状液稳定性/剩余油Key words
binary composite flooding/microfluidics/emulsification capability/emulsion stability/residual oil分类
能源科技引用本文复制引用
郭亚兵,王友启,伦增珉,祝仰文,崔茂蕾,邹积瑞..低界面张力下乳化性能对二元复合体系驱油效率的影响[J].油气地质与采收率,2026,33(3):209-219,11.基金项目
中国石化基础研究项目"驱油用表面活性剂增溶乳化作用研究"(KL22023),国家自然科学基金青年基金项目"微观非均质残余油就地乳化驱动机理和方法"(52204056). （KL22023）
