气液分离计量装置内部流场的数值模拟研究

Numerical Simulation Study of the Flow Field in the Gas-Liquid Separation Metering Device

为了克服目前油井计量装置只能对气相进行计量,不能对液相进行计量的缺点,对不同气相浓度、流速以及黏度条件下的气液分离计量装置内部流场开展数值模拟研究。追踪不同条件下装置内气液界面位置,结合气液分离装置结构特点与气液界面变化特征,分析现有气液分离装置可以满足的油气流动工况。分析结果表明,提高气相入口流速可以提高分离效果,增加分离出的液体比例,入口气相浓度对分离效果有影响;液相黏度增加,分离效果变差,装置内液位高度增加。研究结果为结构改造,实现气、液同时计量奠定了基础。

In order to overcome the shortcomings of existing oil well metering device that it can only measure gas phase and cannot measure the liquid phase,the numerical simulation is carried out to study the internal flow field of gas-liquid separation metering device under different gas phase concentration,flow rate and viscosity conditions,and positions of the gas-liquid interface of the device under different conditions are tracked.Combined with the structural characteristics of gas-liquid separation device and the characteristics of gas-liquid interface,the oil and gas flow conditions that the existing gas-liquid separation device can meet are analyzed.The analysis results show that the increase of gas phase inlet flow speed can improve the separation efficiency and the liquid proportion after separation,and the inlet gas phase concentration can affect the separation effect;and the viscosity of liquid phase increases,the separation effect becomes poor,and the liquid level of the device improves.The results lay the foundation for structural transformation and simultaneous gas and liquid metering.