Oil displacement by a miscible fluid in a porous medium, which is related to injection of hydrocarbonic gas into an oil reservoir, is investigated. A compositional model is used to describe flow of multicomponent mixtures through the porous medium. The thermophysical properties of the mixtures are given by the equation of state of the van der Waals type. The reservoir simulation software for compositional modeling of flow through a porous medium is developed within the framework of this model. The efficiencies of oil displacement from the porous medium by methane or water are compared using the above software. It is shown that in the initial stages of injection oil displacement by water is more efficient under a fixed volume flow rate of the injected fluid. However, in the last stages gas injection becomes more efficient for displacement of light hydrocarbon components.

中文翻译：

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油藏注气注水效率研究

研究了多孔介质中的混相流体驱油，这与向油藏中注入烃类气体有关。成分模型用于描述多组分混合物通过多孔介质的流动。混合物的热物理性质由范德华式状态方程给出。用于对多孔介质流动进行成分建模的油藏模拟软件是在该模型的框架内开发的。使用上述软件比较了甲烷或水从多孔介质中驱油的效率。结果表明，在注入流体的体积流量固定的情况下，在注入的初始阶段，水驱油效率更高。然而，