1. API GAS LIFT TASK GROUP CHAIR - JIM BENNETT EXXONMOBIL

2. TASK GROUP MEMBERS JACK BLANN ERIC BRAUNER JACK BRINK JOE CLEGG MEL COHEN KEN DECKER ED DEMOSS CLEON DUNHAM PAUL EADS FAUSTINO FUENTES BOB GRAY ALI HERNANDEZ NORMAN HEIN KEN HILSE JIM HOLT MIKE JOHNSON ERIC LAINE JIM LEA WAYNE MABRY JOHN MARTINEZ SHAUNA NOONAN HENRY NICKENS MARK OGLIER BOOTS ROUEN ROGER STINSON CINDY TUCKNESS TOM VAN AKKEREN TOMMY WHITE HERALD WINKLER BURNEY WARING

3. NEW MEMBERS NEEDED WORK ON RECOMMENDED PRACTICES –OPERATION, MAINTENANCE, AND TROUBLESHOOTING IS UNDERGOING REVIEW AT THIS TIME SUGGEST OTHER TOPICS AND PUT TOGETHER A TEAM TO WORK ON THE RP –PRODUCTION PRESSURE OPERATED (PPO) DESIGN –DUAL GAS LIFT INSTALLATIONS CONTACT JIM BENNETT TO JOIN –jim.r.bennett@exxonmobil.com

4. LIST OF SPECs AND RPs – 11V1 Spec 11V1 – Gas Lift Valves, Orifices, Reverse Flow Valves and Dummy Valves Wayne Mabry – Work Group Leader Spec on gas lift valves orifices, reverse flow valves, and dummy valves Will be replaced in the future by ISO specification

5. LIST OF SPECs AND RPs – 11V2 RP 11V2 – Gas Lift Valve Performance Testing Ken Decker – Work Group Leader Covers the test procedures for flow performance testing of wireline retrievable and tubing retrievable IPO (injection pressure operated), and PPO (production pressure operated) gas lift valves

6. LIST OF SPECs AND RPs – 11V5 RP 11V5 – Operation, Maintenance, and Trouble-Shooting of Gas Lift Installations Cleon Dunham – Work Group Leader Covers RPs on kickoff and unloading, adjustment procedures, troubleshooting diagnostic tools, and location of problem areas for gas lift operations The RP is in the initial phase of revision – contact Cleon Dunham to participate

7. LIST OF SPECs AND RPs – 11V6 RP 11V6 – Design of Continuous Flow Gas Lift Installations Using Injection Pressure Operated Valves Joe Clegg – Work Group Leader Sets guidelines for continuous flow gas lift installation designs using injection pressure operated valves

8. LIST OF SPECs AND RPs – 11V7 RP 11V7 – Repair, Testing and Setting Gas Valves John Martinez – Work Group Leader Applies to repair, testing, and setting gas lift valves and reverse flow (check) valves. It presents guidelines related to the repair and reuse of valves; these practices are intended to serve both repair shops and operators.

9. PROPOSED RP – UP FOR APPROVAL – 11V8 RP 11V8 – Gas Lift System Design and Performance Prediction John Martinez – Work Group Leader The RP emphasizes gas lift as a system and discusses methods used to predict its performance. Information must be gathered and models validated prior to a system design, which must precede wellbore gas lift mandrel and valve design. The subsurface and surface components of the system must be designed together to enhance the strengths of each and to minimize the constraints.

10. RP 11V8 1.0Overview of a Gas Lift System2 1.1Major Components of a Gas Lift System2 A.Gas Compression and Distribution System B.Subsurface Equipment C.Gas and Liquid Gathering System 1.2 Ways in Which System Components Interact5 2.0Types of Gas Lift Systems7 2.1Continuous Gas Lift7 2.2Intermittent Gas Lift8 A.Two-Packer Chamber B.Insert Chamber 2.3Gas lift with Plunger10 2.4Gas Lift Tubing/Packer Alternatives11 A.Open B.Semi-Closed C.Closed

11. 3.0Information Required for Effective Gas Lift13 3.1Fluid PVT Data13 A.PVT Data Available B.PVT Data Not Available 3.2Flowing Pressure and Temperature Surveys17 A.Pressure Surveys B.Measured Temperatures 3.3Production Tests19 A.Test Accuracy B.Test Frequency C.Test Duration D.Flowline Purging 3.4Gas lift Valve Performance Information23 A.Types of Gas lift Valves B.Valve Opening C.Valve Gas Passage Performance 3.5Field Constraints25 A.Available Pressure for Injection B.Minimum Wellhead Pressure C.Maximum Gas Availability D.Other Constraints

12. 4.0Well Deliverability32 4.1Basic Models32 A.Fluid Pressure Profile B.Gas Pressure Profile C.Temperature Profile D.Inflow Performance 4.2System Models40 A.Production Rate vs. Bottomhole Pressure B.Production Rate vs. Injection Depth C.Production Rate vs. Injection Gas Rate D.Production Rate vs. Wellhead Pressure E.Effects of Deeper/Shallower Injection Depths F.Predicting Gas Requirements

13. 5.0Factors which Affect Potential Production Rate and Gas Injection Requirement46 5.1Casing Pressure and Gas Injection Rate46 5.2Depth of Injection48 5.3Casing, Tubing, and Flowline Sizes49 5.4Gas lift Valves 51 5.5Reservoir Depth, Pressure, and Temperature52 5.6Well Inflow Productivity53 5.7Percent Water in Produced Fluid54 5.8Solution and Free Gas in Produced Fluid54 5.9Operating Separator Pressure55 5.10Wellbore Deviation55

14. 6.0Other Gas Lift Design Considerations57 6.1Gas Supply57 A.Compressor Power B.Suction Pressure vs. Gas Lift Gas Requirement C.Gas Dehydration D.Chemical Additives 6.2Gas Lift Gas Distribution System67 A.Trunk Line System B.Spider System C.Combination System 6.3Injection Gas Measurement and Control69 A.Gas Measurement Methods B.Gas Injection Rate Control Methods C.Automatic Measurement and Control 6.4 Gathering, Testing, and Handling of Produced Fluids 72 A.Effects of Various Wellhead Designs B.Flowline Effects C.Effective Well Testing 6.5Special Design Cases73 A.Dual Completions B.Annular Flow C.Lifting with CO2 or N2

15. 7.0Gas lift Optimization76 7.1Economic Basis for Optimization76 7.2Determination of Gas lift System Economic Costs and Benefits77 7.3Implementation of Field Optimization79 7.4What is Practical and What is Impractical81 8.0Computer Design Tools83 8.1Vertical Pressure Profile Models83 A. Empirical Models B. Mechanistic Models 8.2Vertical Temperature Profile Models87 8.3Well Inflow Performance Models88 9.0Operating Considerations91 9.1Gas lift Operator's Problems91 9.2Design Strategies for Effective Long Term Operation 95 9.3Check List of Gas lift System Problems and Recommendations96

16. API GAS LIFT TASK GROUP TO VOLUNTEER- CONTACT CHAIR - JIM BENNETT EXXONMOBIL EMAIL: jim.r.bennett@exxonmobil.com