Binary-Mixture Flows in a Porous Medium at High Pressure and Temperature

A new model is proposed which enables to describe two component flows of water and carbonic gas under subcritical and supercritical conditions instead of only the water flows. The proposed model is independent of the equation of state and, hence, applicable for the description of filtration of an arbitrary binary mixture. For determining the properties, the mixture thermodynamic potential the entropy, which can be calculated from the cubic mixture-state equation. The nonclassical method of closure of transport equations by the conditional extremum problem is used for determining the mixture properties. A similar approach enables us to describe the flows with taking into account the real properties of the mixture in a wide range of thermobaric conditions containing the critical thermodynamic conditions.