关键词: 非凝析气,    ,  稠油,   ,  降黏率,   ,  , 体积比

Abstract: The southern part of Qinhuangdao 331 oil field is a heavy oil field which has not been exploited. The mode of thermal recovery is considered unusually in the early of exploitation. The design of thermal recovery mode depends on mass experimental data. Based on the indoor physical simulation, the influence of different noncondensate gas on high temperature and high pressure property of heavy oil is studied with a set of experiment instrument which support high temperature and high pressure. The results show that the volume ratio of CO₂ dissolved in heavy oil of the southern part of Qinhuangdao 331 oil field is higher than N₂ obviously, and the reduction rate of CO₂ is 30%~90%. The lower temperature and greater pressure make CO₂ reduce the viscosity of heavy oil more effectively. In different experiment temperature and pressure conditions, the N₂ viscosity reducing extent is lower than 20%, and the dissolving capacity and viscosity reducing effect of flue gas is between N₂ and CO₂.

Key words: Noncondensate gas,    ,  Heavy oil,     ,  Viscosity reduction rate,    , Volume ratio