The Multiphase Active Sampling Device and the associated service has been field tested in four gas condensate wells to demonstrate the quality of the measurement versus conventional PVT Laboratory measurements as well as the impact on the MFM flow rates. The fluid properties measurements were better than 1% between the well site and the equivalent laboratory measurement. The improvement against the standard model in this type of conditions was better than 10% to 20% in the measured oil, water and gas phase flow rates. The direct measurements from the MASD hardware therefore provided a far superior Vx flow rate output measurement when compared with both Correlation and EOS modeling where a single-point calibration is acceptable. The MASD sampling technique may find a limit at very high GVF's but this has yet to be determined with sampling being successfully performed at higher than 99.8% GVF. Fluid properties or phase behaviour input accuracy requirements are rarely challenged, even where this may have a major effect on the global uncertainty such as in high pressure or wet gas conditions but all MFM have as minimum output the Oil, Water and Gas flow rates at line conditions. The industry reports its production at standard conditions and therefore, the flow rates at line conditions need to be converted to standard condition using PVT model in one way or another. The mass and volume flow rate accuracy converted from line to standard condition combine with the intrinsic accuracy of the multiphase flow meter provides the global accuracy of the measurement.
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