Abstract This work is aimed to investigate the effect of CO2/CH4 solvent and N2/CH4 solvent injection on phase behaviors of condensate in DZT reservoir. The results indicate that CO2/CH4 flooding is vaporizing-gas drive when the mole fraction of CO2 is below 0.8, and it becomes condensing-gas drive with the mole fraction of CO2 greater than 0.8. To lower the minimum miscible pressure of multiple contact miscibility (MCM), the mole fraction of CO2 in CO2/CH4 solvent must be larger than 0.6. The N2 content in N2/CH4 solvent has no effect on minimum pressure of MCM.

中文翻译：

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CO2/CH4溶剂和N2/CH4溶剂注入对凝析气藏凝析相行为的影响

摘要 本文旨在研究CO2/CH4 溶剂和N2/CH4 溶剂注入对DZT 油藏凝析油相行为的影响。结果表明，CO2/CH4驱油在CO2摩尔分数低于0.8时为气化驱，CO2摩尔分数大于0.8时为凝气驱。为了降低多重接触混相（MCM）的最小混相压力，CO2/CH4溶剂中CO2的摩尔分数必须大于0.6。N2/CH4 溶剂中的 N2 含量对 MCM 的最小压力没有影响。