凝析气井动态优化配产研究

Study of Dynamic Optimization of Proration for Condensate Gas Wells

凝析气藏开发过程中,地层和井筒的油气体系会出现相间传质的物理化学变化。根据气井动态优化配产方法,结合凝析油气体系相态理论及闪蒸计算方法,对常规优化配产模型进行改进,改进后的模型不仅考虑了"地层-井筒-井口-地面定点"的连续流动,而且考虑了凝析气流动过程中地层和井筒内流体组分的变化,模型计算结果更接近实际气井产能,对凝析气井的生产具有指导意义。

In the course of condensate gas reservoir development,the physical and chemical property changes of mass transfer were induced in the oil and gas system of formation and wellbore.A conventional optimal production allocation model was improved according to gas well proration method and in combination with phase behaviour theory of condensate gas system and flash calculation of flash-balance.The improved mathematical model can not only consider continuous flow from formation-bottom hole-wellhead-surface location,but also consider the fluid composition changes of condensate gas flow.The results is closer to the actual gas well productivity,and it provides a guidance for production.