MODELING THE PROCESS OF DEVELOPMENT OF GAS CONDENSATE DEPOSITS WITH REGARD TO THERMODYNAMIC NONEQUILIBRIUM

Calculation schemes for modeling processes with nonequilibrium phase transformations in the course of development of hydrocarbon fi elds are proposed and characteristic indicators of the development of real gas condensate fi elds are estimated on their basis. It is established that nonequilibrium eff ects lead to signifi cant deviations of the values of actual system parameters (liquid phase fraction and condensate content in the formation gas) from their values estimated for equilibrium states, as a result of which the condensate recovery factor determined with regard to the nonequilibrium state of the system diff ers signifi cantly from its estimate for the equilibrium state. A method for calculating the interphase fl ow intensity is introduced, which allows adapting a nonequilibrium thermodynamic model to actual data with regard to the degree of phase behavior deviation from equilibrium and to the dependence of the rate of relaxation of phase compositions on pressure changes.
Calculation schemes for modeling processes with nonequilibrium phase transformations in the course of development of hydrocarbon fi elds are proposed and characteristic indicators of the development of real gas condensate fi elds are estimated on their basis. It is established that nonequilibrium eff ects lead to signifi cant deviations of the values of actual system parameters (liquid phase fraction and condensate content in the formation gas) from their values estimated for equilibrium states, as a result of which the condensate recovery factor determined with regard to the nonequilibrium state of the system diff ers signifi cantly from its estimate for the equilibrium state. A method for calculating the interphase fl ow intensity is introduced, which allows adapting a nonequilibrium thermodynamic model to actual data with regard to the degree of phase behavior deviation from equilibrium and to the dependence of the rate of relaxation of phase compositions on pressure changes.
Author:  Kh. A. Feizullaev, M. S. Khalilov, B. Kh. Feizullaev and A. A. Damirov
Keywords:  thermodynamically nonequilibrium state, two-phase multicomponent fi ltration, mole fractions of the liquid phase, condensate contents in formation gas, condensate recovery factor.
Page:  509