Calculation of Minimum Miscibility Pressure Using a Multiple Mixing Cell Model

Miscible gas injection is one of the most efficient methods in enhanced oil recovery and minimum miscibility pressure (MMP) is a fundamental parameter in miscible injection projects, since local displacement efficiency in these processes is highly dependent on the MMP. Because experimental determination of MMP is very costly and time-consuming, searching for fast and robust algorithms for determination of MMP is usually needed. In this paper, we developed a simply computable algorithm to calculate minimum miscibility pressure whatever the displacement mechanism. Such an algorithm is based on a multiple mixing cell model without any porous media. A pure P/T flash calculation is only needed since thermodynamic equations are only considered. Results of the study indicated that the MMP values calculated by the multiple mixing cell model agreed well with those measured experimentally using the slim tube and vanishing interfacial tension (VIT) tests.

کلیدواژه ها:

Miscible flood ، Enhanced oil recovery ، Minimum miscibility pressure ، Multiple mixing cell model