射孔水平井中油藏流动与井筒流动的耦合模型研究

COUPLING MODEL OF RESERVOIR FLOW AND WELLBORE FLOW IN PERFORATED HORIZONTAL WELLS

格林函数和源函数方法能够给水平井流动问题提供一个有效的解析解。文中用半解析方法得出了油藏内的流动模型和水平井筒内流体的流动模型,并建立了耦合模型。通过模型对油藏中的水平井井筒内单相流动特性进行数值计算研究。由于油藏模型压力分布较为复杂,使得水平井的流动计算变得相当复杂,应用表征流动特性的非线性方程对空间进行迭代计算。通过编制实用计算程序求解模型,为水平井的设计开采提供一种手段。

For the flow in horizontal wells,both Green's function and source function may provide an effective analytical solution.In this paper,the flow model in reservoirs and the fluid flow model within horizontal wellbore are obtained by a semi-analytical method.Then,the coupling model is established.The single-phase flow behavior within horizontal wellbore is calculated and studied by this coupling model.In this reservoir model,more complicated pressure distribution results in more complicated flow calculation.So,the space is calculated interatively by the nonlinear equation which may characterize flow features.Finally,a practical solution model,which may provide a tool for the design and production in horizontal wells,is established by calculation procedures