存在部分连通夹角断层的油藏试井解释新模型

New Well Testing Interpretation Model about Oil Reservoir with Faults of Part Communicating Angle

通过引入"特殊传导率"考虑非封闭断层的影响,建立了存在一条部分连通断层和两条以不同角度交叉的部分连通断层边界的试井解释新模型。先求得实空间内未考虑井筒储集和表皮效应的井底压力响应函数,通过Laplace数值变换将实空间的解变换到拉氏空间,然后运用Duhamel原理加上井筒储集和表皮效应,通过Stehfest数值反演得到实空间考虑井筒储集和表皮效应的压力响应函数,利用计算机编程绘制了相应的典型曲线并对曲线的影响因素进行了分析。

Considering the influence of non-closed fault by introducing 'specific transmissibility ratio',a new well testing interpretation model containing a partially communicating fault and two intersecting leaky fault with different angles has been established.Firstly,analytical solutions without consider wellbore storage and skin factor have been obtained,and through Laplace numerical transform,the real space solution is changed to Laplace space.Then,using Duhamel principle to add wellbore storage and skin factor,and through the Stehfest numerical inversion,real space transient pressure behavior with considering wellbore storage and skin factor is obtained,and type curves are plotted and various factors which influence the transient pressure behavior are also discussed.