西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (5): 101-112.DOI: 10.11885/j.issn.16745086.2016.01.14.01

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

LIANG Meng1, YUAN Haiyun2, YANG Ying1, YANG Yunbo2, LIN Jiangtao2   

  1. 1. Gubkin Russian State Oil and Gas University, Moscow 119991;
    2. PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710021, China
  • Received:2016-01-14 Online:2017-10-01 Published:2017-10-01
  • Contact: 梁萌,E-mail:liangmeng@mail.ru

Abstract: 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.

Key words: miscible flooding, minimum miscibility pressure, gas injection, enhanced oil recovery, core displacement

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