Abstract: During the exploitation process of the condensate gas reservoir, the fluid is in the porousmedia in the formation, the absorption phenomena existbecause of the influence causing by the porousmedia, so that this phenomenonwill influence on the retrograde condensation inevitability. This will be leading to the phase characteristic of the condensation been influenced. Based on considering the critical flowing saturation in this paper, improving a new gas and liquid absorption model of condensate gas, adding the critical flowing saturation influence on the absorptionmode,l and in thisway, the newmodelwillbemore authentic and be able to stimulate the phase behaviorof condensate gas in really formation better. The resultwhich was calculated
by the newmodel in this paperwas that the saturation of retrograde condensation considered in porousmedia was higher than the onewhich not in the porousmedia, and themole fraction of the vaporwas decreased, and liquid increased.

Key words: phase behavoir, porous media, absorption, critical flowing saturation