STUDY OF ADSORPTION OF CONDENSATE GAS MIXTURE ON SURFACE OF POROUS MEDIA

Because the porous media have very large specific area, adsorption of fluid of gas condensate reservoir in porous medium are is in reality, so that it will affect the problems of gas reservoir engineering, such as reserves calculation, phase behavior simulation and gas well production calculation etc. On the basis of analyzing the mechanism of porous medium adsorbing gas condensate reservoir fluid and according to the theory of gas solid adsorption, adsorption mathematics model of condensate gas in porous medium has been developed. By case calculating, adsorption amount and the composition of the adsorbed fluid of condensate gas in porous medium have been analyzed. Results show that the adsorption amount decreases with temperature rising, and increases with pressure going up. At the same time, in the same porous medium and under the same temperature and pressure, the system with high heavy component cut has high adsorption amount. Finally, it is concluded that the order of the adsorption amount of reaches 10 2 ?mol/kg and it should be taken into account in the practical engineering.