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A new solution of well test model for multistage fractured horizontal wells
Author(s): 
Pages: 1150-1156
Year: Issue:  6
Journal: Acta Petrolei Sinica

Keyword:  horizontal wellmultistage fracturedwell testorthogonal transformtemplate curve;
Abstract: 通过综合考虑多段压裂水平井试井数学模型中无限导流裂缝、裂缝呈不同倾角、裂缝间距不等、裂缝纵向上未完全穿透地层等多种情况,建立了多段压裂水平井不稳定渗流模型.并利用源函数理论、三维特征值法和正交变换等现代数学分析方法对模型进行求解,获得了该模型的压力精确解.通过Laplace变换和Stehfest数值反演得到了考虑井筒存储和表皮系数影响的多段压裂水平井井底压力解.绘制了典型的试井分析样版曲线,对各参数进行了敏感性分析,并进行了实例验证,可以看出该模型可以用于多段压裂水平井渗流特征研究及不稳定试井分析.
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