MULTIPHASE FLUID FLOW RATE AND DENSITY MEASUREMENT

摘要

The density of a multiphase fluid mixture (gas and liquid) and the volumetric flow rate of the liquid and gas in the mixture may be determined by measuring the hydrostatic pressure difference across a span of a horizontal conduit section or a vertical conduit section by pressure transmitters spaced apart opposite each other on the horizontal conduit leg or spaced apart vertically along a vertical conduit leg. The pressure difference due to hydrostatic pressure only may be determined in the vertical conduit leg by also measuring the pressure difference along a span of a horizontal conduit leg of length equal to the span of the pressure difference measurements in the vertical leg to eliminate calculation of the pressure drop due to friction. Volumetric flow rates of gas and liquid may be determined based on the density measurements and the volumetric flow rate of the fluid mixture.