低渗气藏压裂水平井产能公式推导与分析  

Derivation and Analysis of Production Formula of Fractured Horizontal Wells in Low Permeability Gas Reservoirs

作　　者：王静[1] 刘德华[1] 

机构地区：[1]长江大学石油工程学院,湖北武汉430100

出　　处：《辽宁化工》2016年第3期349-351,355,共4页Liaoning Chemical Industry

摘　　要：低渗透气藏开发是目前油气藏开发的难点,往往采用水平井水力压裂的方法以增加产能,而许多低渗气藏的产能模型没有考虑气体滑脱及裂缝间干扰所带来的影响。运用以叠加原理及等值渗流阻力原则等方法,将低渗气藏压裂水平井完井后流体的渗流区划分为三个区域:裂缝内气体的达西线性流动,气体在基质中的径向渗流区以及水力压裂裂缝泄流引起的非达西椭圆渗流区。建立考虑气体滑脱、裂缝间干扰影响的压裂水平井产能计算模型,分析了不同滑脱效应下各流入动态曲线,结果表明:随滑脱系数增加,气井产量相应增大;井底流压越低,随滑脱系数的增加气井产量变化越明显。因此低渗气藏开发中气体滑脱效应不可忽视。The development of low permeability gas reservoir is a difficulty in oil and gas reservoir development, the method of horizontal well fracturing is often used to increase production capacity. Many productivity models do not consider effect of gas slippage and crack interaction. Using the superposition principle and the principle of equivalent flow resistance and other methods, the seepage area of gas reservoir fracturing horizontal wells after well completion was divided into three parts： Darcy linear flow zone in the fractures and radial vadose zone in the matrix, non-Darcy flow ellipse vadose zone caused by hydraulic fracture flush-flow. In this paper, the productivity calculation model of fracturing horizontal well was established, and different inflow performance curves under the slippage effect were analyzed. The results show that： with the increase of the slip factor, the production of fractured gas well increases; the lower the bottom hole flowing pressure, the more obvious the production of gas well changes with increasing of slippage coefficient. The gas slippage effect in developing low permeability gas reservoir cannot be ignored.

关 键 词：低渗透气藏 压裂水平井 产能公式 滑脱效应 裂缝干扰 

分 类 号：TE32[石油与天然气工程—油气田开发工程]