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本文介绍在原始状况下,天然岩心有汽驱残余油饱和度时,蒸汽—水相渗透率的测试技术。通过 CT 扫描测定天然岩心每一平衡点的饱和度。压降测试技术与目前公开发表的液—液系统中的测试方法是相类似的。在驱动过程中,进出口端允许有一定的热量散失,汽—水相渗透率的计算则是采用压力数据和进出口端的温度。在多孔介质中,蒸汽相的相对渗透率在考虑误差后与公开发表的气相相对渗透率很接近,而水的相对渗透率似乎低于由菜弗里特在非胶结砂子中所测定的值。由于岩心中粘土矿物的膨胀和微粒的迁移,使压力和饱和度的测定变得复杂化。而本文所介绍的测定多孔介质中蒸汽相相对渗透率的方法则是可行的,但多孔介质的绝对渗透率必须是不变的。
This article describes the test technique of vapor-water permeability for natural cores with residual fuel oil saturation at the original condition. The saturation of each equilibrium point of a natural core is determined by CT scanning. The pressure drop test technique is similar to the currently published test methods in liquid-liquid systems. In the driving process, import and export side allows a certain amount of heat loss, vapor - water permeability is calculated using the pressure data and the temperature of the import and export side. In porous media, the relative permeability of the vapor phase is very close to the published relative permeability of the gas phase after considering the error, while the relative permeability of the water appears to be lower than the value measured by Dishlett in the non-cementing sand. The determination of pressure and saturation is complicated by the swelling of clay minerals and the migration of particles in the core. However, the method described in this paper to determine the relative permeability of vapor phase in porous media is feasible, but the absolute permeability of porous media must be constant.