非水相液体驱替过程的微观孔隙网络模型研究

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