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International Society for Industrial Process Tomography

10th World Congress on Industrial Process Tomography

Measurement of three-phase oil-gas-water flow using ERT-based multi-modality sensor and drift flux model 

S. Rashed1, Y. Faraj1*, S. J. Wilkinson1, M. Wang2

1University of Chester, Chester, United Kingdom

2University of Leeds, Leeds, United Kingdom 



This paper proposes a rapid, reasonably accurate and non-invasive novel multiphase flow metering strategy to measure the flow rate of each constituent phase within three-phase oil-gas-water in upwards-vertical water continuous phase flow. The measurement strategy is based on the novel concept of combining a dual-plane Electrical Resistance Tomography sensor for measuring dispersed phase volume fraction and velocity, a gradiomanometer Flow Density Meter (FDM) and Drift Flux Model to take the slip velocities into account, along with absolute pressure and temperature measurements. The volumetric flow rates of three-phase oil-gas-water are determined based on data fusion of ERT-FDM-DFM, including determining phase velocity and phase volume fraction. In addition, Water Liquid Ratio (WLR) and Gas Volume Fraction (GVF) are estimated based on measured flow rates. The strategy investigation covers a wide range of flow rates 5-10, 2-10 and 1-15 m3/h for each of water, oil and gas, respectively, in Water-Liquid Ratio (WLR) > 35% and a range of Gas Volume Fraction (GVF) between 8-90%. The results are evaluated and compared with those previously published experimental measurements obtained from Schlumberger Gould Research (SGR) flow facility. The results demonstrate that the proposed multi-modality sensor provides reasonably accurate measurements of phase flow with an absolute error of ±10% within the GVF range covered in this study. 

Keywords: Three-phase flow, flow metering, Electrical Resistance Tomography, Drift Flux Model. 

Industrial Application: Oil and gas industry

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