考虑高速流动效应的凝析液饱和度变化规律

建立了凝析气藏的油气两相渗流数学模型及其数值模型，并给出了求取数值解的隐式压力显式饱和度(IMPES)方法。首次用数值解方法研究了考虑毛管数效应、非达西效应及其耦合作用高速流动效应下凝析油气混合物渗流规律。根据计算结果，考虑毛管数效应后的凝析油平均饱和度明显低于不考虑毛管数效应的模型，在较高产量下，凝析油饱和度沿径向方向先增加后减小，表现出明显的速度剥离效应。而非达西效应则导致更高凝析油饱和度，尤其以近井地带明显。两种效应的耦合作用通常是降低凝析油饱和度，即高速流动有利于提高凝析气井产能。

Study on condensate saturation with the influnce of high velocity flow

The paper presents a mathematical model of two-phase flow in gas condensate reservoir, a numerical model and its IMPES method to acquire the solution. This paper studies the two-phase flowing characteristics in gas condensate reservoir considering the capillary number effect and non-Darcy effect based on numerical solution method firstly. The condensate oil saturation calculated falls markedly near wellbore when considering the capillary number effect. And its distribution increases first and then decreases away from wellbore. Non-Darcy effect brings higher condensate oil saturation than that without its influence. Generally, the coupling of both effects can reduce the condensate oil saturation. The high-velocity effect can enhance the productivity of gas condensate well.