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对凝析气藏开发动态和经济效益的正确预测需要正确模拟这类气藏的液态和相态。模拟流态最重要的是获取有代表性的凝析油气相对渗透率曲线，它是数模和试井分析中最常用的基础曲线，目前通常采用模拟油和模拟气相渗曲线来替代凝析油气相渗曲线。但低界面张力的传统油气在多孔介质中的流动规律并不同于凝析油气的流动规律，凝析油气物性非常接近，凝析油在水与凝析气之间形成一个水动力连续的夹膜，它随着凝析气一起流动。同时多孔介质特性、原生水、润湿性、重力、界面张力、粘滞力、流速等因素对凝析油气流动规律的影响作用也不同于对传统油气流动的影响作用。由于微观渗流规律不同，凝析油气相对渗透率的变化规律不同于传统油气相渗，不能用低界面张力油气体系相渗来代替凝析油气相渗，进而确定了实验实测相渗曲线的重要性和今后的研究方向。

Investigation of the Microvisual Flow and Relative Permeability Law of Condensate Oil and Gas

It is necessary for well predicting the performance and economic returns of condensate gas reservoir to model correctly its flow state and phase state and it is most important for modeling the flow state to obtain the representative relative permeability curves of condensate oil and gas which are the basic cures most commonly used in mathematical model and well testing analysis.The relative permeability curves of analog oil and gas are generally adopted for replacing those of condensate oil and gas at present.The flowing law,however,of the conventional oil and gas with low interfacial tensions in porous media is different from that of the condensate oil and gas,because the physical properties of the condensate oil and gas are approaching to each other and through forming a hydrodynamically conducting film included between water and condensate gas,the condensate oil can flow together with the condensate gas.Meanwhile,the degree of the influence of these parameters as porous media,initial water,wettability,gravity,interfacial tension,viscous force and flow velocity,etc.,on the flow law of the condensate oil and gas is also different from that of the conventional oil and gas.Because of different microvisual percolation flow laws,the change laws of relative permeabilities of the condensate oil and gas are different from those of the conventional oil and gas,therefore the relative permeabilities of the oil gas system with low interfacial tensions can't be used for replacing those of the condensate oil and gas.Finally the importance of the relative permeability curves measured through experiment and the trend studied in the future are determined in the paper.