储层岩石中流体驱替过程的微观孔隙网络模型研究

A pore-network model physically based on pore level multiphase flow is used to study the ware-oil displacement process , especially on the effects of the wettability, the water-oil interfacial tension, the fraction of oil-wet pores, and the initial water saturation for the displacement .The computed data show that, with the wettability of the mineralogy surface changes from strongly water-wet to oil-wet, the capillary pressure and the oil relative permeability gradually decrease, while the water-oil interfacial tension has little effect on relative permeability to water ,but the initial water saturation has a profound effect on the water and oil relative permeability. The analysis result may help to understand the micro-structure displacement process of oil phase liquid and to provide the theoretical foundation for oil transfer controlling.