底水油藏一水平井筒耦合模型研究

采用势叠加和镜像原理对底水油藏水平井人流形态进行研究，考虑摩擦压降、加速度压降以及混合压降等因素，并结合油藏渗流与井筒压降协调条件，建立了底水油藏一水平井筒耦合模型，计算了底水油藏水平井压力和流量分布。实例计算结果表明，沿井筒长度方向流量呈“U”型分布，压力从趾端41．449MPa到跟端41．351MPa逐渐变小，趾端变化较小，跟端变化较大，该模型对优化底水油藏水平井设计具有一定的参考价值。

Study on Coupling Model of Horizontal Well in Bottom-Water Drive Reservoir

Based on the potential superposition principle and the mirror reaction principle,this article has studied the inflow form of the horizontal well in bottom-water drive reservoir.This model considers the friction,acceleration,and mixing impact due to fluid inflow into the well and so on.And then combining with coupling conditions by fluid flow equation in reservoir and wellbore pressure drop equation we get the reservoir-wellbore coupling model.The calculation results show that: the flow rate distribution along the horizontal well is similar to the letter "U",the pressure gradually becomes smaller from the foot(41.449 MPa) to the heel(41.351 MPa),and the pressure in the foot does not change as extinguish as that in the heel.This article has proved that the model has certain reference value for the optimization of the horizontal wells.