在裂缝发育带水驱油的形式主要取决于孔隙渗透率、裂缝渗透率以及驱替压力的大小。
The water drive patterns in fissure developing zones mainly depend on whether pore permeability, fissure permeability and displacement pressure are high or low.
文中进行了水驱油和氮气驱油试验，以比较驱替效果，探究超低渗油藏的驱替机理。
Water - drive and nitrogen - drive experiments are performed to compare their displacement effects and study the displacing mechanism of ultra - low permeability reservoirs.
岩心驱油降压模拟实验表明，表面活性剂体系驱替0.5倍孔隙体积(PV)，后续水驱替压力下降48%左右。
Core simulation experiments showed that the pressure of water drive could decrease by 48% after surfactant drive (0.5 PV).
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