水平井ICD控水方法研究

ICD控水技术是通过抑制高渗段、增加低渗段流量实现水平井流动剖面均衡开采的新型控水完井工艺。利用数值模拟方法研究了高渗带比例、渗透率极差、控制段长度、控制段流量对ICD在底水油藏中控水增油效果的影响，并确定ICD最佳安装位置、限流量和控制段长度等参数。结果表明，在非均质油藏中，高渗带与水平井长度比例越小、高渗带与低渗带渗透率极差越大，ICD的控水增油效果越明显；ICD的安装位置、长度和限流量对ICD的控水增油效果有重要影响。为了使控水增油效果最大化，应将ICD安装于水平井段的高渗带，ICD控制段长度要等于或略高于高渗带长度，限流后高渗段的限流量需尽量靠近水平井各井段的平均流量。

Research on the method of controlling bottom water with Inflow Control Devices (ICD) in horizontal well

Inflow Control Devices(ICD) represents a new well completion technology for controlling bottom water which provides uniformity of the inflow profile by restricting high specific inflow segments while increasing inflow from low productivity segments.This paper studys with numerical simulation the effects of the proportion of high permeability zone,permeability grading,the length of control section and the flow rate of control section on the water breakthrough performace of a reservoir with bottom water using ICD,and determines the optimum placement of inflow control device,the flow resistance rating and the length of control section.The results show that the smaller the proportion of high permeability zone is and the larger permeability grading is,the better the water breakthrough performace of a reservoir with bottom water is in heterogeneous reservoirs,and ICD mounting location,length and limit flow rate have an importantment of water breakthrough performace of a reservoir with bottom water.In order to make the water control and oil increment effect maximization,ICD should be installed in horizontal well section of high permeable zone,and the length must be equal to or slightly higher than the high permeable zone length.The flow rate in the high specific inflow segments shold be as close as possible to the average flow rate in all sections.