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在注气过程中，死油通常是由于重力、粘滞及非均质性的影响而造成的。通过改善流动条件以及注入气和死油区之间质量传递可以采出这些死油。以前，我们通过试验评估了近混相气驱中相态特性和毛细窜流的影响。但这些研究是在无水条件下进行的。本文评价了含水饱和度对死油和死油带质量传递速率的影响，通过注入气与死油一次接触混溶（FCM）、多次接触混溶（MOM）或微混溶，使用不同的含水饱和度在不同方向上进行了气驱；还进行了质量传递试验并研究了其机理。结果表明：垂向微混相气驱采油不受含水饱和度级别的影响；有水存在时，水平气驱会产生少量重力上窜。质量传递试验表明：产量随富集度的增大而提高，因水的存在而降低。对有效扩散系数作为含水饱和度和富集度的函数也进行了估算。
During gas injection, dead oil is usually caused by the effects of gravity, viscosity and heterogeneity. These dead oils can be extracted by improving flow conditions and mass transfer between injected and dead zones. Previously, we evaluated the effects of phase behavior and capillary channeling in a near-miscible gas drive by testing. However, these studies were conducted under anhydrous conditions. In this paper, the effect of water saturation on the mass transfer rate of dead oil and dead oil zone was evaluated. Through injection mixed gas and dead oil primary contact mixing (FCM), multiple contact mixing (MOM) or micro-miscibility, Saturation gas flooding was conducted in different directions; mass transfer experiments were also conducted and their mechanisms investigated. The results show that the vertical micro-mixed gas drive oil production is not affected by the water saturation level; in the presence of water, the horizontal gas drive will produce a small amount of gravity channeling. The mass transfer test showed that the yield increased with the increase of the enrichment degree and decreased with the presence of water. The effective diffusion coefficient is also estimated as a function of water saturation and enrichment.