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地下多孔介质因具有较大的比面积而对凝析油气流体具有较强的吸附能力,多孔介质吸附对凝析油气渗流过程的影响是国内外较为关注的问题。文章在新的凝析油气渗流微分方程的基础上,通过渗流数学模型的建立与求解,建立了考虑相态变化与多孔介质吸附影响的凝析气井产能方程,探讨了凝析气井产能正确预测的方法。通过实例计算和分析,结果表明:考虑与不考虑多孔介质吸附影响的凝析气井产能存在较大的差别,凝析气井地层压力低于露点压力后,将出现反凝析液损失,将引起气井产能较快地降低,验证说明了在对凝析气井进行试井解释时可考虑采用复合气藏模型。
Because of the large specific surface area, porous media have strong adsorption capacity for condensate hydrocarbon fluids. The influence of porous media adsorption on the seepage process of condensate hydrocarbons is a major concern at home and abroad. Based on the new condensate seepage differential equation and the establishment and solution of mathematical model of seepage flow, the production equation of condensate gas well considering the influence of phase change and the adsorption of porous media was established, and the correct prediction of condensate gas well productivity method. The results show that there is a big difference between the productivity of condensate gas wells considering the influence of adsorption of porous media and the influence of porous media adsorption. After the formation pressure of condensate gas wells is lower than the dew point pressure, the loss of back condensate will occur, Production capacity decreases more quickly, validating that complex gas reservoir models can be considered when testing wells in condensate wells.