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A 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 . |
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Keywords:non-aqueous phase liquids ; pore-network model ; capillary pressure ; relative permeability |
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