陕西科技大学学报(自然科学版)2009，Vol.27Issue(5)：12-16,23,6.
凝析气藏注气过程中露点压力变化特征研究
CHANGING OF DEWPOINT PRESSURE FOR CONDENSATE GAS IN GAS INJECTION
摘要
Abstract
Dewpoint pressure of condensate gas changes greatly during gas cycling and huff "n" puff, which is not often considered in the development of gas condensate reservoirs. Using empirical model of Nemeth.L.K and Kennedy.H.T, this research is conducted to investigate the effects of injecting different media, including methane, CO2, propane and N2 on the gas condensate dewpoint pressure. The changing characteristic of dewpoint is studied during depletion and different gases injection. The injected methane could reduce the dewpoint pressure of condensate gas slightly, while CO2 or propane can decreases it obviously, otherwise the dewpoint increase during N2 injection. When reservoir pressure is lower than dewpoint, the composition of heavier components increase during the gas flows towards near-wellbore-zone. During gas huff "n" puff process the condensate gas dewpoint increases due to heavy components increases with condensate evaporation in the soak stage.关键词
露点压力/注气/变化特征/近井带Key words
dewpoint pressure/ gas injection/ condensate gas/ near wellbore region分类
石油、天然气工程引用本文复制引用
李虎,李相方,赵林,李军刚..凝析气藏注气过程中露点压力变化特征研究[J].陕西科技大学学报(自然科学版),2009,27(5):12-16,23,6.基金项目
国家重点基础研究发展计划(973)项目(2007CB209506) （973）
