Numerical method for calculating the phase equilibrium of hydrocarbons taking into account capillary properties for given porous media

This work is devoted to the analysis of a numerical method for calculating the two-phase equilibrium of a hydrocarbon mixture with a capillary pressure jump with reference to a specific porous medium. This method is a joint analysis of the thermodynamic capillary curve obtained by calculating the phase equilibrium with a capillary jump of a hydrocarbon mixture, which is described by the Peng - Robinson equation of state, and the experimental capillary curve describing a porous medium. The results obtained demonstrate the possibilities of using this method in calculations taking into account the capillary pressure jump effect. The described calculation-theoretical technique is applicable to systems with an arbitrary number of components and can be easily generalized to other equations of state, such as the Redlich - Kwong equation.