在线多相流量计测量技术研究

Study on Metering Techniques of in-Line Multiphase Flow Meters

多相流量计分别通过对相分率和流速的测量实现油气水流量计量。阐述相分率测量原理和流速测量原理,分析多相流量计测量相对不确定度。通常多相流量计标称不确定度小于±10％,满足油气田井口计量的精度要求,但不同的流量计有其各自的适应工作范围,必须根据现场工况进行合理的选择。

Most multiphase flowmeters make their three independent measurements by a combination of velocity measurements with phase fractions derived from physical property measurements. The operating principles of velocity and phase fractions measurements were discussed. Its uncertainties were analyzed in detail. Most multiphase flowmeters can provide phase flow rate measurements with uncertainties of ±10% relative to the actual flow rate within a limited range of flow rate. For well testing purpose their accuracy may be sufficient. The selection of the most appropriate type must be determined by the conditions to be measured.