1. Gas Lift Workshop Breakout Session
Session Title: Gas Lift Terms and Equations
Session Coordinator: John Martinez
Title slide
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The second line (in smaller type style) is for the date of the presentation – depending on your presentation, you may also need to include Location and/or Presenter’s name/s and Job title if needed – as a such a second line may be used for these purposes.
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2. Breakout Session Details
Session Purpose: Develop consensus on basic terms and equations used in gas lift calculations for setting valve test rack opening pressure
Number of Attendees
Operating Companies – 2
Wayne Mabry – Shell
Sam Wildman - Oxy
Service/Supply Companies – 2
Josiah Haines – Senior Flexonics
Rick Haydel - Altec
University and Consultants- 2
John Martinez – Production Associates
Omoteyo Omosebi – Univ of Oklahoma
May 16 – 20, 2016
2016 Gas-Lift Workshop

3. API Gas Lift Handbook David McCalvin-Coordinating Editor
John Martinez-Technical Editor
Workgroup:
Mike Johnson-Chair
Ian Schuur
Greg Stephenson
Reagan Wilkins
May 16 – 20, 2016
2016 Gas-Lift Workshop

4. Primary Discussion Points
Point 1 – Develop consensus on basic terms, apply to all API documents, work with SPE Wikipedia to adopt terms, work with all service providers to slowly adopt the terms
Point 2 – Assure that terms and equations correspond to prior work in API G2 Flow-control Devices for Side-pocket Mandrels (gas lift valves) annexes
Point 3 – Use Ap/Ab term from Mfg data sheets, but include discussion on use of As (ball/seat contact area) if data available
Point 4 – Obtain worksheets from all service providers to review commonly used terms for guidance
May 16 – 20, 2016
2016 Gas-Lift Workshop

5. Terms
May 16 – 20, 2016
2016 Gas-Lift Workshop

6. Terms
May 16 – 20, 2016
2016 Gas-Lift Workshop

7. Basic Equations Valve in well: Pbt = Pvcd (1 - Ap/A b) + Ppd (Ap/A b)
Estimate unloading temperature F
Ftc = Factor to correct Pbt from unloading to standard setting temperature, usually 60F (Use Rtc ?)
Pb60 = Ftc * Pbt this equation applies in the test rack
Valve in tester 60F):
Ptro = P b60 / (1 - Ap/Ab)
If Pa is atmospheric pressure and assumed as zero in tester compared to other pressures
May 16 – 20, 2016
2016 Gas-Lift Workshop

8. Summary Key Points Standardize within API documents
Consider service provider terms
Expand to SPE and software providers
May 16 – 20, 2016
2016 Gas-Lift Workshop