关键词: 凝析气, 露点压力, 流体组分, 气油比, 多孔介质, 影响因素

Abstract: Many factors such as components, gas-oil ratio (GOR) and non-equilibrium effect have some affects on dew point pressure of conden-sate gas. The components of condensate gas have different effects on the dew point pressure. The influences of propane, butane and hydrogen sulfide on the dew point pressure of condensate gas are obvious. GOR have multiple effects on the dew point pressure. When GOR is larger than some value, the dew point pressure increases with GOR increasing. However, when GOR is larger than the value, larger GOR may lead to smaller dew point pressure. The ideas about the effects of porous media on the dew point pressure seem to be still controversial in some literatures. As the composition has a heavy influence on the dew point pressure, the continuous change of composition of fluid near well may result in the complex phase behaviors near the well bore during the production. Accurate determination of the dew point pressure is helpful to evaluate the production of condensate gas reservoir.

Key words: gas condensate, dew point pressure, fluid component, gas-oil ratio, porous media, affecting factors