CO解除低渗气藏反凝析液伤害研究

The study of using CO puff.huff to eliminate damage due to retrograde condensed liquid in low permeability gas reservoir

吕栋梁 唐海 李胜杰 范启东

Lv Dongliang Tang Hai Li Shengjie Fan Qidong

西南石油大学, 成都新都 610500; 大港油田地质研究所, 天津大港 300280

Southwest Petroleum University, Chengdu 610500; Geological Graduate School of Dagang Oilfield, Dagang 300280

在低渗透凝析气藏生产过程中,如何解除井筒附近凝析油析出与聚集对气井生产动态的负面影响一直是石油工作者关注的问题。通过实验分析和数值模拟研究方法,对比分析了CO2、N2、CH4解除低渗透凝析气藏井筒附近凝析油伤害的效果,结果表明CO2的效果最佳,是一种能够高效解除凝析油伤害的方法。研究结果对于改善低渗透凝析气藏开发效果具有重要的参考价值。

When develop a low permeability gas-condensate reservoir, how to release from negative influence on gas well production caused by the appearance and congregation of oil condensation is always concerned by petroleum engineers. Based on the experiment and numerical simulation contrast of the effect of releasing the low permeability gas reservoir from retrograde condensation contamination by CO2, N2 and CH4, this paper indicated that using the CO2 would be a highly effective way to improve the development effect of a low permeability gas-condensate reservoir.