Improved MMP correlations for CO2 floods using analytical gas flooding theory

H. Yuan, R. T. Johns, A. M. Egwuenu, B. Dindoruk

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations


Local displacement efficiency from CO2 gas injection is highly dependent on the minimum miscibility pressure (MMP). Correlations are often used to estimate the MMP where the injected fluid may or may not contain impurities such as methane. These correlations, however, are based on a limited set of experimental data and as such are not widely applicable. They also do not accurately account for the more complex condensing/vaporizing displacement process. This paper presents new MMP correlations for the displacement of multicomponent oil by CO2 and impure CO2. The approach is to use recently developed analytical theory for MMP calculations from equations-of-state (EOS) to generate MMP correlations for displacements by pure and impure CO2.1-8 The advantage of this approach is that MMPs for a wide range of temperatures and reservoir fluids can be calculated quickly and accurately without introducing uncertainties associated with slim-tube MMPs and other numerical methods. The improved MMP correlation is based solely on the reservoir temperature, molecular weight of C7+, and percentage of intermediates (C2 - C6) in the oil. The MMPs from the improved correlation are compared to currently used correlations and 41 experimentally measured MMPs. Correlations are also developed for impure CO2 floods, where the injection stream may contain up to 40% methane. The new correlations are significantly more accurate and applicable than currently used correlations.

Original languageEnglish (US)
Title of host publicationSociety of Petroleum Engineers - SPE/DOE Symposium on Improved Oil Recovery 2004, IOR 2004
PublisherSociety of Petroleum Engineers (SPE)
ISBN (Print)9781555639884
StatePublished - 2004
EventSPE/DOE Symposium on Improved Oil Recovery 2004, IOR 2004 - Tulsa, United States
Duration: Apr 17 2004Apr 21 2004

Publication series

NameProceedings - SPE Symposium on Improved Oil Recovery


OtherSPE/DOE Symposium on Improved Oil Recovery 2004, IOR 2004
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Geotechnical Engineering and Engineering Geology


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