化学体系乳化性能和界面活性对渗流特征影响差异*

Influence of Emulsification and Interface Property on Seepage Characteristics of Chemical System

汪士凯 施雷庭 叶仲斌 袁晨阳 张虎 谭林

WANG Shikai SHI Leiting YE Zhongbin YUAN Chenyang ZHANG Hu TAN Lin

为了厘清乳化性能和界面活性在化学体系驱油过程中的作用效果差异，分别采用乳化性能较弱、界面张力 达10-3mN/m的复合体系和乳化性能较强、界面张力达10-2mN/m的复合体系进行相对渗透率曲线测定和微观驱 替实验，分析了两种体系的渗流特征。研究表明：相对于乳化性能较强而界面活性较弱的复合体系，乳化性能较 弱而界面活性较强的复合体系的油水相相对渗透率更大，等渗点偏右，残余油饱和度相对低4.4%；当驱替时间较 长而达到高含水饱和度时，乳化性能较强而界面活性较弱的体系具有足够时间充分发挥乳化作用，具有更高的 提高采收率潜力。图10参12

In order to clarify the effect difference of emulsification and interface property in chemical system flooding，one composite system with weak emulsification performance and interfacial tension of 10-3mN/m and another with strong emulsification performance and interfacial tension of 10-2 mN/m were used to measure the relative permeability curve and micro displacement experiment，then the the seepage characteristics were compared. The results showed that，compared with the composite system with strong emulsification and weak interfacial activity，the composite system with weak emulsification and strong interfacial activity had larger relative permeability of oil-water phase，the isopermeability point was to the right，and the residual oil saturation was relatively 4.4% lower. When the displacement time was long and reached high water saturation，the system with strong emulsification and weak interfacial activity had enough time to play an emulsification role and had higher EOR potential.

10.19346/j.cnki.1000-4092.2021.01.023