任意形状复合油藏压力动态的边界元分析

油气藏形状对井底压力动态响应有着显著的影响，常规的解析方法只能计算规则形状油气藏的井底压力响应。该文建立了任意形状复合油藏不稳定渗流的数学模型，并将区域分割法与边界元方法相结合，研究了任意形状复合油藏不稳定压力响应的计算方法，应用杜哈美原理考虑了表皮效应与井储系数对井底压力动态响应的影响。绘制并分析了复合油藏的典型曲线，通过分析指出油藏的边界性质会影响典型曲线后期形态，而内区形状的也可能掩盖复合油藏典型曲线的特点。

Pressure transient analysis of composite reservoir using the boundary element method

The effect of the shape of reservoir boundaries on the welbore pressure analytical methods can only be used to calculate wellbore pressure response in regularly response is evident. The conventional shaped reservoirs. The transient flow mathematical model of arbitrary shaped composite reservoir was constructed. By using the domain decomposition method and the boundary element method, the model may be solved. Then, wellbore pressure with effects of skins and wellbore storage was obtained by using the Duhamel principle. At last, the type curves are plotted and analyzed considering effects of the arbitrary shape and complex boundary condition. Boundary condition and boundary shape affect the type curve at late time heavily.