Experimental Characterization of Two-Phase Flow Through Valves Applied to Liquid-Assisted Gas-Lift

Author:

Coutinho Renato P.1,Waltrich Paulo J.1,Williams Wesley C.1,Mehdizadeh Parviz2,Scott Stuart3,Xu Jun4,Mabrye Wayne5

Affiliation:

1. Craft & Hawkins Department of Petroleum Engineering, Louisiana State University, 3207 Patrick F. Taylor Hall, Baton Rouge, LA 70803

2. Production Technology Incorporates, 14225 North 99th Street, Scottsdale, AZ 85260

3. Petroleum ETC, 707 Post Oak Boulevard #404, Houston, TX 77056

4. Shell Exploration and Production Company, 200 N Dairy Ashford Road, Houston, TX 77079

5. Shell International Exploration and Production, 200 N Dairy Ashford Road, Houston, TX 77079

Abstract

Abstract Liquid-assisted gas-lift (LAGL) is a recently developed concept to unload wells using a gas–liquid fluid mixture. The success deployment of the LAGL technology is related to the behavior of two-phase flow through gas-lift valves. For this reason, this work presents an experimental and numerical study on two-phase flow through orifice gas-lift valves used in liquid-assisted gas-lift unloading. To the knowledge of the authors, there is no investigation in the literature on experimental characterization of two-phase flow through gas-lift valves. Experimental data are presented for methane-water flow through gas-lift valves with different orifice port sizes: 12.7 and 17.5 mm. The experiments were performed for pressures ranging from 1.00 to 9.00 MPa, gas flow rates from 0 to 4.71 m3/h, and water flow rate from 0 to 0.68 m3/min. The experimental results are compared to numerical models published in the literature for two-phase flow through restrictions and to commercial multiphase flow simulators. It is observed that some models developed for two-phase flow through restrictions could successfully characterize two-phase flow thorough gas-lift valves with errors lower than 10%. However, it is first necessary to experimentally determine the discharge coefficient (CD) for each gas-lift valve. The commercial flow simulators showed a similar performance as the models available in the literature.

Funder

Shell Exploration and Production Company

Publisher

ASME International

Subject

Geochemistry and Petrology,Mechanical Engineering,Energy Engineering and Power Technology,Fuel Technology,Renewable Energy, Sustainability and the Environment

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