| 摘要 |
A multi-phase flow meter system is provided to determine individual phase fractions for three phases within a fluid mixture flowing in a conduit 100. A speed of sound array sensor 104 and phase fraction meter 106 such as a water cut meter provide signals indicative of the speed of sound in the mixture and percentage of a first phase 107 in the mixture, which may be the water fraction. These are used to determine the percentages of second and third phases in the mixture, such as oil and gas. Appropriate flow algorithms can utilize this phase fraction information with a sensed total combined flow rate Vmix of the mixture to find individual flow rates for the three phases, such as oil, water and gas. For some embodiments, a multiphase flowmeter includes an array of spatially distributed pressure sensors configured to determine a speed of sound in the mixture and any type of water cut meter, oil cut meter or gas cut meter. |
