The Case for Liquid-Assisted Gas Lift Unloading
- Renato P. Coutinho (Louisiana State University) | Wesley C. Williams (Louisiana State University) | Paulo J. Waltrich (Louisiana State University) | Parviz Mehdizadeh (Consultant, Production Technology Incorporated) | Stuart Scott (Shell Exploration and Production Company) | Jun Xu (Shell Exploration and Production Company) | Wayne Mabry (Shell International Exploration and Production)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- February 2018
- Document Type
- Journal Paper
- 73 - 84
- 2018.Society of Petroleum Engineers
- gas-lift, liquid-assisted, unloading, single-point injection
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- 1,448 since 2007
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The case for a unique form of gas lift unloading, termed liquid-assisted gas lift (LAGL), is presented. This work demonstrates that the injection of a gas/liquid mixture allows the transport of gas to a deep injection point with injection pressure considerably lower than single-phase gas injection. The LAGL is demonstrated in a 2,880-ft-deep test well, by use of natural gas and water. The test well is kicked off with an injection pressure that would normally be higher than the pressure for single-point single-phase gas injection at this depth. Experimental results indicate that the proposed technique can lower the surface injection-pressure requirements by up to 75% for the scenarios investigated in this study compared with single-point gas lift unloading.
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Almabrok, A. A., Aliyu, A. M., Lao, L. et al. 2016. Gas/Liquid Flow Behaviours in a Downward Section of Large-Diameter Vertical Serpentine Pipes. International Journal of Multiphase Flow 78: 2543. https://doi.org/10.1016/j.ijmultiphaseflow.2015.09.012.
Barnea, D., Shoham, O., and Taitel, Y. 1982a. Flow-Pattern Transition for Downward Inclined Two-Phase Flow; Horizontal to Vertical. Chemical Engineering Science 37 (5): 735–740. https://doi.org/10.1016/0009-2509(82)85033-1.
Barnea, D., Shoham, O., and Taitel, Y. 1982b. Flow-Pattern Transition for Vertical Downward Two-Phase Flow. Chemical Engineering Science 37 (5): 741–744. https://doi.org/10.1016/0009-2509(82)85034-3.
Bhagwat, S. M. and Ghajar, A. J. 2012. Similarities and Differences in the Flow Patterns and Void Fraction in Vertical Upward and Downward Two-Phase Flow. Experimental Thermal and Fluid Science 39: 213–227. https://doi.org/10.1016/j.expthermflusci.2012.01.026.
Candido, S. F. 1989. Offshore Production Systems in Deep Waters: Artificial Lift Methods and Flow Lines Design. Master’s thesis, Campinas State University (UNICAMP), Campinas, Brazil (May 1989).
Hasan, A. R. 1995. Void Fraction in Bubbly and Slug Flow in Downward Two-Phase Flow in Vertical and Inclined Wellbores. SPE Prod & Fac 10 (3): 172–176. 5. SPE-26522-PA. https://doi.org/10.2118/26522-PA.
Hernandez, A., Gonzalez, L., and Gonzalez, P. 2002. Experimental Research on Downward Two-Phase Flow. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 29 September–2 October. SPE-77504-MS. https://doi.org/10.2118/77504-MS.
Pittman, R. W. 1982. Gas-Lift Design and Performance. Presented at the International Petroleum Exhibition and Technical Symposium, Beijing, China, 17–24 March. SPE-9981-MS. https://doi.org/10.2118/9981-MS.
Surbey, D. W., Kelkar, B. G., and Brill, J. P. 1989. Study of Multiphase Critical Flow Through Wellhead Chokes. SPE Res Eng 4 (2): 142–146. SPE-15140-PA. https://doi.org/10.2118/15140-PA.
Takács, G. 2005. Gas-Lift Manual. Tulsa, Oklahoma: PennWell (Reprint).
Tang, Y., Schmidt, Z., Blais, R. N. et al. 1999. Transient Dynamic Characteristics of the Gas-Lift Unloading Process. SPE J. 4 (3): 268–278. SPE-57659-PA. https://doi.org/10.2118/57659-PA.
Xu, Z., Richard, B. M., and Kritzler, J. H. 2013. Smart Gas-Lift Valves Enhance Operation Efficiency of Offshore Wells. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 30 September–2 October. SPE-166291-MS. https://doi.org/10.2118/166291-MS.