The property of interfacial tension in oil displacement system through rock absorption and thermal ageing is investigated.

考察了驱油体系经岩石吸附和热老化以后的界面张力特征；

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For higher recovery, not only to minimize interfacial tension between displacement system and the crude oil, but also to appropriately increase the viscosity of oil displacement system.

欲获得较高的采收率，不仅要尽量降低驱油体系与原油间的界面张力，而且要适当增加驱油体系的黏度。

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Mechanism of low interfacial tension system increasing oil displacement efficiency is analyzed based on microscopic oil displacement experiments.

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。

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