考虑颗粒充填的水平井控水完井产量预测方法

A method for horizontal well production prediction with water control completion considering gravel packing

近年来在水平井管柱与井眼环空进行颗粒充填的控水方法在底水油藏得到了广泛的应用,目前尚没有准确的产量预测方法。为此,从宏观流动与微观流动的差异性入手,分析了流体在底水油藏、颗粒充填层、控水工具等不同空间维度内流动之间的相互关系,在油水两相数值模拟模型的基础上,采用“矩阵镶边”的方法将3个维度的流动模型相互耦合,提出了考虑颗粒充填的水平井控水完井产量预测方法,准确度比常规等效方法提高9.17%。研究结果表明,新方法能够实现流体在油藏、颗粒充填层和控水工具间窜流量的定量求解,更直接地体现不同空间维度流动对控水效果的影响,为底水油藏考虑颗粒充填的水平井控水完井产量预测提供了有力工具。

In recent years,the water control method of gravel packing in the annulus between horizontal well tubing and borehole has been widely used in bottom water reservoirs,while the accurate production prediction method has not been determined yet.In order to solve this problem,the interrelationships of fluid flow among different spatial dimensions,such as bottom water reservoir,gravel-packed layer,and water control device,are analyzed from the difference between macro and micro flows,and the three dimensional flow models are coupled together using the method of"matrix edging"based on the numerical simulation model of oilwater two-phase.And thus,a method for gravel packed horizontal well production prediction with water control completions is proposed,with an accuracy of 9.17%higher than the conventional method.The results show that the new method can realize the quantitative solution of the fluid flow among the reservoir,gravel-packed layer and water control device,and more directly reflect the influence of fluid flow in different spatial dimensions on the effect of water control,which provides an effective means for the production prediction of horizontal wells with the water control completion in bottom water reservoirs considering the gravel packing.