The influence of a capillary pressure jump in a porous medium on the equilibrium between its liquid and gas phases, defined by the Peng–Robinson equation of state, was investigated. A numerical analysis of the phase diagrams of a gas–condensate mixture, constructed in gas-pressure and liquid-pressure coordinates for different capillary pressure jumps in the mixture, has been performed. The boundary of the two-phase region of such a mixture was determined as a domain of its existence in the two-phase state. The calculations were not associated with a concrete porous medium, and they were based on the condition of phase equilibrium of such a medium at different capillary pressure jumps in it.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 96, No. 6, pp. 1527–1536, November–December, 2023
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Raikovskii, M.I., Dem’yanov, A.Y., Dinariev, O.Y. et al. Calculation of the Phase Equilibrium of a Hydrocarbon Mixture with Regard for the Capillary Pressure Jump in It by the Example of the Astrakhan Field. J Eng Phys Thermophy 96, 1516–1526 (2023). https://doi.org/10.1007/s10891-023-02821-x
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DOI: https://doi.org/10.1007/s10891-023-02821-x