一种压裂水平井产能计算方法

A method of productivity calculation for fractured horizontal well

产能评价方法研究是水平井压裂的重点和难点工作之一。由基础理论出发,正确认识地层和裂缝的产量分布特征,利用当量井径概念,确定了带有多条横向裂缝的水平井压裂产能公式,并分析确定了油藏模型和水平井裂缝的几何参数和物性参数,动态分析了裂缝条数、裂缝间距等因素对水平井井底压力和裂缝流量分布的影响。对于现场进行水平井压裂优化设计具有一定的指导意义。

Productivity evaluation is an important and difficult work in horizontal well fracturing.With proper understanding of production distribution in the formation and fractures,a productivity equation for fracturing in horizontal wells with many lateral fractures is determined by using the concept of equivalent borehole diameter.The geometric and physical parameters of the reservoir model and horizontal well fractures are also analyzed and defined.The influences of the number of fractures and the distance between fractures on bottom hole pressure in horizontal wells and fracture flow distribution are dynamically analyzed.This may guide fracturing design of horizontal wells.