复合凝析气藏三区流动模型的井底压力动态分析

针对传统凝析气藏油气分布模型存在的问题,建立了一种新的三区复合凝析气藏试井模型,该模型考虑了外边界为无穷大、封闭和定压3 种情况,导出了不同外边界条件下的井底压力的表达式,绘出了相应的典型样板曲线,并对三区复合凝析气藏的井底压力动态变化及影响因素展开分析和讨论。该方法采用的新模型更符合凝析气藏的开采过程中的真实情况,对凝析气藏开采分析研究具有切实的指导意义。

Dynamic Analysis for Bottom-Hole Pressure in Composite Gas Condensate Reservoir by Using 3-Realm Flowing Model

The oil-gas distribution model for conventional gas condensate reservoir is not used to properly deal with the bottom-hole pressure in gas condensate reservoir, A new 3-realm composite well testing model of such a reservoir is developed in this paper. The external boundaries with infinite, enclosed and constant pressures are taken into consideration for educing expressions of bottom-hole pressures under different external boundaries and plotting corresponding type curves. The dynamic changes and affected factors to the bottom-hole pressure in this reservoir are analyzed and discussed. The study shows that this new model is more closed to the real conditions in the process of gas condensate production, and it can be as a guide for performance analysis of such reservoirs.