裂缝性气藏气井的分形渗流产能方程

在裂缝性气藏中, 常规模型难以准确描述裂缝发育的非均质性。如何更准确的评价单井的产能, 是现场开 发生产中面临的紧迫问题。在分形渗流研究基础上, 引入裂缝发育参数, 用于表征井控范围内裂缝的分布与连通情况, 建立了分形渗流稳态产能方程, 明确了裂缝对产能计算结果的影响, 并用塔里木油田克深区块实际井例进行了验证。相 对于常规模型, 分形渗流产能方程使预测产量与实测产量误差由20. 9%下降为3. 53%, 预测结果与现场实测更加吻合。

Fractal Percolation Deliverability Equation of Gas Wells in Fissured Gas Reservoirs

In fissured gas reservoirs, it is difficult for conventional models to be used to describe accurately the heterogeneity of fissure development. How to evaluate accurately the individual well deliverability is a pressingproblem in field development and production. On the basis of fractal percolation (seepage) study, the fracturedevelopment parameters are introduced to characterize the distribution and connectivity of fractures in the wellcontrol range. A fractal percolation steady -state deliverability (productivity) equation is established and theinfluence of fractures on the calculation results is clarified, and has been verified with the actual wells in the Ke¬shen Block of Tarim Oilfield. Compared with the conventional model, the fractal percolation deliverability equationreduces the error between the predicted and the measured production rate from 20. 9% to 3. 53 %, and theprediction result is more consistent with the field measurement.