A new three-phase flow metering technology is discussed in this paper, which combines Coriolis mass flow and water cut readings and without applying any phase separation . The system has undergone formal laboratory trials at TUV NEL (National Engineering Laboratory), UK and at VNIIR (National Flow Laboratory), Kazan, Russia; a number of field trials have taken place in Russia. Laboratory trial results from the TUV NEL will be described in detail. For the 50mm (2") metering system, the total liquid flow rate ranged from 2.4 kg/s up to 11 kg/s, the water cut ranged from 0% to 100%, and the gas volume fraction (GVF) from 0 to 50%. In a formally observed trial, 75 test points were taken at a temperature of approximately 40 °C and with a skid inlet pressure of approximately 350 kPa. Over 95% of the test results fell within the desired specification, defined as follows: the total (oil + water) liquid mass flow error should fall within ± 2.5%, and the gas mass flow error within ± 5.0%. The oil mass flow error limit is ± 6.0% for water cuts less than 70%, while for water cuts between 70% and 95% the oil mass flow error limit is ± 15.0%. These results demonstrate the potential for using Coriolis mass flow metering combined with water cut metering for three-phase (oil/water/gas) measurement.
Bibliographical noteThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Zhou, F, Henry, M & Tombs, M 2014, 'Laboratory and field trials of Coriolis mass flow metering for three-phase flow measurement', AIP Conference Proceedings, vol. 1592, no. 1, 105 and may be found at https://aip.scitation.org/doi/abs/10.1063/1.4872093
Zhou, F., Henry, M., & Tombs, M. (2014). Laboratory and field trials of Coriolis mass flow metering for three-phase flow measurement. AIP Conference Proceedings, 1592(1), . https://doi.org/10.1063/1.4872093