混合网格在水平井油藏数值模拟中的应用

由于流体在水平井附近呈径向流动，采用直角网格系统的常规油藏模拟器进行模拟不够可靠。本文用一种环绕井眼的混合网格加密方法，即将直角网格与径向网格相结合以模拟水平井眼附近流体流动。并利用第七届SPE考题所公布的数据验证了该模型的有效性。

Application of Hybrid Grid in Horizontal Well Reservoir Numerical Simulation

It is not quite reliable to model fluid flow around horizontal wellbores with conventional reservoir simulators of rectangular grid system due to the fact that the fluid flow is found to be a radial flow. In this paper, we simulate the radial fluid flow around the horizontal wellbores with an efficient method of hybrid refinement around the wellbore by combining rectangular gridblocks with the radial gridblocks. We also choose the 7th SPE comparative Solution Project(SPE 21211) to demonstrate the effectiveness of the model.