能量解调算法在油气水三相流流速测量中的应用

Application of Energy Demodulation Algorithm to Velocity Measurement of Oil-gas-water Three Phase Flow

将单通道盲信号分离技术应用于油气水三相流流速测量领域,提出了基于能量解调算法的油气水三相流气液相分离方法。将电导传感器采集的油气水三相流流动噪声信号进行分离,得到气相信号和液相信号,再结合相关测量技术分别对气相信号和液相信号进行时延估计,进而可以得到气相流速和液相流速。通过对不同工况的油气水三相流信号进行流速测量实验可知,采用该方法进行气液相流速测量的误差均小于10%,为准确测量油气水三相流气液相流速提供了一种可行的方法。

Blind signal separation technology is applied in velocity measurement of oil-gas-water three-phase flow. A gas-liquid phase separation method of oil-gas-water multiphase flow based on energy demodulation algorithm is proposed. The separations of oil-gas-water three-phase flow signals which are collected by conductance are performed, so gas-phase signal and oil-phase signal are obtained. After the time delay estimation for gas-phase signals and oil-phase signals respectively, gas phase velocity and liquid phase velocity are derived. The flow velocity measurement experiments for different conditions of oil-gas-water three-phase flow are performed. The results indicate that measurement error is less than ten percent. It provides a feasible method for gas-liquid phase velocity measurement nf th,~ ~,;1 k 1