Identification of Oil-Gas Two Phase Flow in a Vertical Pipe using Advanced Measurement Techniques

  • L. A. Abdulkareem Department of Petroleum Engineering, University of Zakho, Iraq
Volume: 10 | Issue: 5 | Pages: 6165-6171 | October 2020 |


The characteristics of flow configuration in pipes are very important in the oil industry due to its role in governing equipment design. In vertical risers, many flow configurations could be observed such as bubbly, slug, churn, and annular flow. In this project, two tomographic techniques have been applied simultaneously to the flow in a vertical riser: the Electrical Capacitance Tomography (ECT) technique and the Capacitance Wire Mesh Sensor (WMS) technique. The employed pipe diameter was 50mm and the superficial studied velocities were 0.06-3.0m/s for gas and 0.06-0.4m/s for oil. Several techniques have been used to analyze the output data of the two tomography techniques such as time series of cross-sectional averaged void fraction, Probability Density Function (PDF), image reconstruction, and liquid hold-up profile. The averaged void fractions were calculated from the output signal of the two measurement techniques and plotted as functions of the superficial velocity of the gas. The flow patterns were identified from the PDF of the averaged void fraction. In addition, it was found that both tomographic techniques are reliable in identifying the flow regimes in pipes.

Keywords: insert void fraction, electrical capacitance tomography, wire mesh sensor, two phase flow


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B. J. Azzopardi, Gas-liquid Flows. New York, NY, USA: Begell House, 2006.

M. H. Chachar, S. A. Jokhio, A. H. Tunio, and H. A. Qureshi, "Establishing IPR in Gas-Condensate Reservoir: An Alternative Approach," Engineering, Technology & Applied Science Research, vol. 9, no. 6, pp. 5011-5015, Dec. 2019. DOI:

L. A. AbdulKareem, B. J. Azzopardi, S. Thiele, A. Hunt, and M. J. Da Silva, "Interrogation of Gas/Oil Flow in a Vertical Using Two Tomographic Techniques," presented at the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering, Feb. 2010, pp. 559-566. DOI:

V. A. Musa, L. A. Abdulkareem, and O. M. Ali, "Experimental Study of the Two-Phase Flow Patterns of Air-Water Mixture at Vertical Bend Inlet and Outlet," Engineering, Technology & Applied Science Research, vol. 9, no. 5, pp. 4649-4653, Oct. 2019. DOI:

M. J. Da Silva, S. Thiele, L. Abdulkareem, B. J. Azzopardi, and U. Hampel, "High-resolution gas-oil two-phase flow visualization with a capacitance wire-mesh sensor," Flow Measurement and Instrumentation, vol. 21, no. 3, pp. 191-197, Sep. 2010. DOI:

G. Costigan and P. B. Whalley, "Slug flow regime identification from dynamic void fraction measurements in vertical air-water flows," International Journal of Multiphase Flow, vol. 23, no. 2, pp. 263-282, Apr. 1997. DOI:

Ohnuki A. and H. Akimoto, "Experimental Study on Transition of Flow Pattern and Phase Distribution in upward air-water Two-phase Flow along a Large Vertical Pipe", International Journal of Multiphase Flow, Vo. 26, pp 367-386, 2000. DOI:

M. Abdulkadir, D. Zhao, S. Sharaf, L. Abdulkareem, I. S. Lowndes, and B. J. Azzopardi, "Interrogating the effect of 90° bends on air-silicone oil flows using advanced instrumentation," Chemical Engineering Science, vol. 66, no. 11, pp. 2453-2467, Jun. 2011. DOI:

M. Byars, "Developments in electrical capacitance tomography," 2nd World Congress on Industrial Process Tomography, pp. 542-549, Jan. 2014.

W. Warsito and L.-S. Fan, "Measurement of real-time flow structures in gas-liquid and gas-liquid-solid flow systems using electrical capacitance tomography (ECT)," Chemical Engineering Science, vol. 56, no. 21, pp. 6455-6462, Nov. 2001. DOI:

B. Azzopardi, V. Hernandez Perez, R. Kaji, M. J. Da Silva, M. Beyer, and U. Hampel, "Wire mesh sensor studies in a vertical pipe," in Proceedings of the 5th International Conference on Transport Phenomena in Multiphase Systems, HEAT 2008, Bialystok, Poland, 06.-03.07 2008.

E. Q. Bashforth, J. B. P. Fraser, H. P. Hutchison, and R. M. Nedderman, "Two-phase flow in a vertical tube," Chemical Engineering Science, vol. 18, no. 1, pp. 41-46, Jan. 1963. DOI:

M. M. Mustafa, "Investigation of Gas-Liquid Flow in Vertical Pipes by using Wire-Mesh Sensor & Measuring the Viscosity Flow of Fluids using BS/U/M Viscometers," Ph.D. dissertation, University of Zakho, Zakho, Iraq, 2013.


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