AICD智能控水阀性能评价及应用

Performance Evaluation and Application of AICD Intelligent Water Control Valve

自适应流入控制装置AICD依靠对流体黏度等的识别,自动调节过流通道的大小,抑制高产水段产量,进而减缓油井含水上升速度。目前海上油田选择使用AICD控水阀时没有理论依据去判断是否符合产量和生产压差的要求。因此,基于物模实验研究了油、水在不同流速下通过浮板型AICD控水阀时的压降大小,利用非线性回归方法,拟合控水阀压降数学模型。结果表明:AICD控水阀压降主要受流体密度、黏度、流速的影响,相同流速下,黏度越低含水率越高,流体通过AICD控水阀的压降越大,且随着流速增大,过阀压降呈指数增大。研究及应用成果为海上油田控水完井选阀提供了理论依据。

The adaptive inflow control device AICD relies on the recognition of fluid viscosity and so on to automatically adjust the size of the flow channel,inhibit the production of the high-yield water section,and then slow down the water cut rise rate of the well.At present,there is no theoretical basis to judge whether it meets the requirements of production rate and production pressure difference when choosing AICD water control valve in offshore oilfield.Based on physical model experiment,the pressure drop of oil and water passing through AICD water control valve at different flow rates was studied,and the mathematical model of pressure drop of AICD water control valve was fitted by the use of nonlinear regression method.The results show that the pressure drop of AICD water control valve is mainly affected by fluid density,viscosity and flow rate.At the same flow rate,the lower the viscosity is,the higher the water content is,the larger the pressure drop of fluid passing through AICD water control valve is,and the pressure drop over the valve increases exponentially with the increase of flow rate.The research and application results provide a theoretical basis for valve selection in offshore oilfield water control completion.