Gas Effect in Electrical-Submersible-Pump-System Stage-by-Stage Analysis
- Gabriel B. F. F. Oliva (Federal University of Rio Grande do Norte) | Hannah L. C. Galvão (Federal University of Rio Grande do Norte) | Diogo P. dos Santos (Federal University of Rio Grande do Norte) | Raphael E. Silva (Federal University of Rio Grande do Norte) | André L. Maitelli (Federal University of Rio Grande do Norte) | Rutácio O. Costa (Federal University of Rio Grande do Norte) | Carla W. S. P. Maitelli (Federal University of Rio Grande do Norte)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- August 2017
- Document Type
- Journal Paper
- 294 - 304
- 2017.Society of Petroleum Engineers
- ESP Pump, Electrical Submersible Pumping, Multiphase flow, Artificial lift
- 1 in the last 30 days
- 331 since 2007
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One of the main problems regarding the use of the artificial-lift method of electrical-submersible-pump (ESP) systems is the presence of gas in the pump. This paper presents and describes an analysis of ESP systems with a stage-by-stage calculation to determine intake and discharge pressures to adjust total dynamic head (TDH) for each stage of the pump.
The modeling was designed to acknowledge free gas in the pump, and iterative calculations are applied to recalculate, for each stage, fluid characteristics and physical properties, such as viscosity, density, formation volume factor (FVF), surface tension, solubility ratio, gas/oil ratio (GOR), and other flow characteristics along the tubing, such as temperature and pressure. Developed modeling validation was achieved by comparisons in two scenarios. In the first one, fixed values of intake pressure and changeable values of GOR were used to assess gas effect. In the tests for the second scenario, fixed values of GOR and changeable values of intake pressure were used.
Necessary research was conducted through a developed computational tool used to size ESP components. The results were different from those obtained with the usual calculations, and it may be implied that the developed modeling is more accurate to determine parameters related to this artificial-lift method. Also, the results were more consistent and closer to the actual behavior of multiphase-flow phenomena within the tubing because each stage has its characteristics individually evaluated. These observations may have an effect on the number of pump stages and influence in choosing the adequate equipment of the system.
|File Size||1011 KB||Number of Pages||11|
API RP 11S2: Recommended Practive for Electric Submersible Pump Testing. 1997. Washington, DC: American Petroleum Institute.
Barbosa, T. S. 2011. Ambiente para a Avaliação de Controladores Fuzzy Aplicados ao Método de Elevação Artificial por Bombeio Centrífugo Submerso. Dissertação (Mestrado em Ciência e Engenharia de Petró-leo). Programa de Pós Graduação em Ciência e Engenharia de Petró-leo, Universidade Federal do Rio Grande do Norte, Natal, Brazil (July 2011).
Burden, R. L. and Faires, J. D. 2011. Numerical Analysis, ninth edition, Youngstown State University.
Dunbar, C. E. 1989. Determination of Proper Type of Gas Separator. SPE Microcomputer Users Group Meeting, Long Beach, California, USA, 15–17 October.
Lea, J. F., Turpin, J. L., and Bearden, J. L. 1986. Correlation of Performance Data for Electric Submersible Pumps With Gas-Liquid Flow. Proc., 33rd Annual Southwestern Petroleum Short Course, Lubbock, Texas, USA April, 267–281.
Pessoa, R. and Prado, M. 2001. Experimental Investigation of Two-Phase Flow Performance of Electrical Sumersible Pump Stages. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 30 September–3 October. SPE-71552-MS. https://doi.org/10.2118/71552-MS.
Prado, M. G. 2007. Electrical Submersible Pumping Course. R. J. Brazil: Petrobras.
Turzo, Z., Takács, G., and Zsuga, J. 2000. A Computerized Model for Viscosity Correction of Centrifugal Pump Performance Curves. 47th Southwestern Petroleum Short Course, Texas, April.
Williams, G. S. and Hazen, A. 1920. Hydraulic Tables, third edition, New York: John Wiley and Sons.