直接液力式智能完井超长距离液压传递特性研究

Research on the characteristics of ultra long distance hydraulic transmission in direct hydraulic intelligent completion

直接液力式智能完井系统的流量控制阀距地面控制器较远,如何保证流量控制阀时间响应和精准定位是直接液力式智能完井系统面临的主要难题。本文以达西公式和液阻、液感和液容等效理论为基础,建立模型并推导计算了液压传递的沿程压力损失及系统响应时间,并通过了陆地试验井和海试井试验验证。现场试验结果表明,控制响应时间、流量控制阀定位与理论计算基本一致。本文研究为实现流量控制阀精准控制和提高作业时效提供了支撑。

The interval control valve(ICV) of direct hydraulic intelligent completion system is far from the ground controller,so how to ensure the time response and accurate positioning of ICV become the main problem faced by direct hydraulic intelligent completion system.Based on Darcy formula and the equivalent theories of liquid resistance,liquid inductance and hydraulic volume,a model is established,and the pressure loss along hydraulic transmission and the system response time are deduced and calculated,which has been verified by onshore and offshore test wells.The field test results show that the control response time and ICV positioning are basically consistent with the theoretical calculation.This study provides support for realizing accurate control of ICV and improving operation efficiency.