气体混相驱与最小混相压力测定研究进展

气体混相驱具有对地下环境影响小、采收系数高、可同时实现温室气体封存等优点。在优选注气工艺时，岩芯驱替实验、气体与原油的最小混相压力测定（MMP）是油藏实现混相驱的基础。针对上述问题，首先讨论了混相驱岩芯驱替实验的影响因素，其次分析了地层温度、气体组成、原油组成等条件对MMP的影响，再次，对比分析了不同测定MMP的实验方法，最后，对近年来新研发的MMP测试手段进行了归纳总结。当用天然岩芯进行混相驱研究时，为达到混相建议选择尽可能长的岩芯。MMP的测试手段种类繁多，但目前仍未形成公认的实验方法。

Research Progress on Miscible Gas Displacement and Determination of Minimum Miscibility Pressure

Miscible gas flooding has the advantages of negligible effects on the underground environment, high recovery efficiency, and simultaneous storage of greenhouse gases. In the process of optimizing gas injection procedures, core displacement experiments and measurement of the minimum miscibility pressure (MMP) of the gas and crude oil are the basis for the miscible displacement of the oil reservoir. To solve the above problems, the factors influencing miscible core flooding were discussed. Secondly, the effects of formation temperature, gas composition, and crude oil composition on MMP were analyzed. Additionally, the different experimental methods for determining MMP were analyzed and compared. Finally, the new research and development of MMP test methods in recent years were summarized. When using natural cores for miscible flooding studies, it is advisable to select cores as long as possible to achieve miscibility. There is a wide range of MMP test methods, but there is no widely accepted experimental method.