油水界面张力对三元复合驱驱油效果影响的实验研究

用组分、结构相近的同系列表面活性剂配制三元复合体系，进行不同平衡界面张力和瞬间界面张力条件下的岩心驱油实验和微观驱油实验，通过岩心驱油实验结果分析油水间平衡、瞬间界面张力对驱油效果的影响规律；通过微观驱油实验结果分析低界面张力体系能够提高驱油效率的机理。结果表明，较低的平衡和瞬间界面张力有利于三元复合体系提高采收率。其机理是：三元复合体系的低界面张力有利于水驱后剩余油的启动和运移。

Effect of Interfacial Tension on Experimental Results of ASP Flooding

The same series of surfactant with close composition and structures are used to confect ASP system for microscopic oil displacement experiments and core displacement experiments under various equilibrium interfacial tension and instantaneous interfacial tension. The effect of equilibrium between oil and water, and instantaneous interfacial tension on oil displacement results is obtained through core displacement experiments; Mechanism of low interfacial tension system increasing oil displacement efficiency is analyzed based on microscopic oil displacement experiments. The results suggest, lower equilibrium and instantaneous interfacial tension are propitious to recovery factor improvement with ASP flooding. The mechanism here is: the low interfacial tension of ASP system is propitious to the migration and startup of remaining oil after water flooding.