统一函数关系的凝析气井流入动态模型

Inflow dynamic model for condensate gas well of uniform function relationship

韩光明 李明忠 李岩芳 何龙

HAN Guang-ming LI Ming-zhong LI Yan-fang HE Long

承德石油高等专科学校石油工程系, 河北承德 067000 中国石油大学石油工程学院, 山东东营 257061

凝析气井流入动态曲线反映了凝析气藏向生产井供液的能力,研究凝析气藏的流入动态曲线,可以更好地进行生产参数优化设计,提高凝析气藏的最终采收率。针对不同井底流压下凝析气藏三区渗流的特点,推导建立了统一函数关系的凝析气井流入动态数学模型,并编制了相关的计算程序,进行了实例计算和流入动态曲线特性分析。研究结果表明,不同井底流压下的凝析气井流入动态曲线方程是一个以地层原始压力、露点压力、临界流动压力为端点的连续性函数,在充分考虑相关影响因素后,所推导建立的数学模型更接近实际情况。

Inflow dynamic curve of condensate well reflects fluid supply capacity from condensate gas reservoir to production well.Studying inflow dynamic curve of condensate gas reservoir may present optimization design of production parameter better and improve ultimate recovery of condensate reservoir.In allusion to percolation characteristics in condensate gas reservoir No.3 block under different bottom hole flowing pressure,inflow dynamic mathematical model for condensate gas well of uniform function relationship is established by reasoning,correlative calculation program is worked out,and example calculation and characteristic analysis of inflow dynamic curve are done.The research results show that inflow dynamic curve equation of condensate gas well under different bottom hole flowing pressure is a continuous function regarding formation original pressure,dew point pressure,and critical flow pressure as endpoint.After considering related influencing factors,mathematical model established by reasoning adapts to the reality better.

10.3969/j.issn.1000-7393.2007.05.008