Miscible displacement of oil


Miscible displacement of oil This example demonstrates MUFITS capabilities for modelling the multi-contact miscible displacement in porous media. Such modelling requires application of the compositional module of the simulator. This example shows how the simulator can be switched for using the compositional model, how the number of components is specified, and how the EoS coefficients can be loaded from the built-in library. The benchmark study involves a 1-D linear flow. At the initial moment of time the reservoir is saturated with the three-component hydrocarbon mixture of methane (CH4), hexane (C6H14) and hexadecane (C16H34). This should be considered as a proxy of realistic oil. The oil is displaced by the wet hydrocarbon gas containing methane and propane (C3H8). The gas injection results in development of the miscible displacement through the appearance of a sequence of the shocks (displacement fronts) and rarefactions (R) propagating through the reservoir. The gas saturation and the bulk fluid composition are discontinuous at the shocks. We apply the Soave-Redlich-Kwong cubic EoS with the volume shifts for modelling the vapor-liquid equilibria of the non-ideal mixture. The EoS coefficients are loaded from the built-in library, although they can also be specified explicitly by user.

File Version Description
COMPS-TEST-A.RUN 2020.A Input file to the compositional module of MUFITS for modelling the miscible displacement of oil by hydrocarbon gas.


  1. Description of the benchmark study.
  2. Afanasyev A.A., Vedeneeva E.A. 2020 Investigation of the efficiency of gas and water injection into a petroleum reservoir. Fluid Dynamics. In press [in Russian].