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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- 1,515 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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