应用不稳定试井判断砂砾岩油藏井间连通性

砂砾岩油藏储层空间展布复杂、横向变化快、非均质性严重,使得井间连通关系难以准确判定,干扰试井的测试方法受到一定的限制。从井间储层连通与储层不连通的两种模式出发,基于镜像反映原理及压降叠加原理,推导建立了生产井井底压力导数变化公式。提出了一种实用的、基于不稳定试井资料判定井间连通关系的方法;该方法经在实际测试井组中应用,判定结果准确可靠,易于矿场推广应用。

Applying Transient Well Test to Judge the Interwell Connectivity Relationships in Glutenite Reservoir

Rapid variation and strong heterogeneity of glutenite reservoirs make it quite difficult to judge the exact connectivity relationships between wells. Transient well test is one of the significant means to judge the interwell connectivity. Herein, starting from connected and disconnected formation patterns, the differential formula of bottom-hole pressure is derived based on reflection principle and superposition principle, then a practical method of applying transient well test to judge interwell connectivity relationships is established. Field application results exhibit the usability and accuracy of this method, which could be widely applied in filed practices.