Containing Vapor Condensate Gas Reservoir Development

Flowing of condensate gas in porous media is a complex phychemical flowing process because of it being affected by many parameters. Some factors may strongly affect gas well productivity and act as predominant influence factors of gas production in low permeability gas reservoir. But, many of them have not been studied plainness. Phase behavior and producing behavior affected by water vapor in condensate gas also have not been studied.This paper presents series methods to research the effect of water vapor in condensate gas system. There are including ways of sample compound and test of condensate gas which includes water vapor, phase behavior compare study between lean condensate gas and rich condensate gas, phase behavior simulation considering water vapor, formation harm study because of water vapor condensing, single well simulation considering water vapor influence.Application indicate that water vapor in condensate gas will increase dew point pressure and strongly affect phase behavior of condensate gas, condensate saturation near wellbore will be higher than that of not considering water vapor effect. Condense water will increase oil permeability and decrease gas permeability rapidly as well as accelerate oil accumulation near wellbore. Conclusion also shows that water vapor existing in condensate gas will be one of main affected factor of gas production declining.