定义：通常简称为驱油效率，即采用水驱采油的方式，驱替出的地下原油与驱替波及范围内的原油的比值。
表面活性剂能够提高此类储层的微观水驱油效率10%左右。
Surfactants can improve the water displacing oil efficiency by about 10%.
目的研究特低渗弱亲油储层水驱油过程、水驱油效率及其影响因素。
Aim to study the water displacing oil efficiency of weak oil-wet low permeability reservoirs, displacing process and affecting factors.
油气藏具有构造幅度低、非均质性严重、低阻油层发育及水驱油效率低等特点。
The reservoirs are characterized by low height trap, serious heterogeneous reservoir, low resistivity and poor efficiency of water driving oil.
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