API 11V Task Group
15 November, 2007Houston, USA
Agenda• Introduction
• What is the pertinent API Organization? • What is an API Recommended Practice (RP)? • What is the typical API RP development process? • What is the typical API RP development time line? • What commitment is required to complete this document? • API Procedures for Standards Development • 11V Task Group Process
• Revise, Modify/Confirm Objectives
• Revise, Modify/Confirm Content Structure and Scope (draft provided below)
• Tasks definition and distribution (option to volunteer)
• Discuss/agree on this RP document development/review process
• Discuss potential project time line
• Agree on place, date of next meeting
API Organisation
Gas-Lift Task Group OrganizationTask Group Chairman – Jim Hall, Shell Int’l E&P
Secretary – Cleon Dunham, Oilfield Automation Consulting
Active Projects:
RP11V5 – Chairman, Cleon Dunham
RP11V6 – Chairman, Joe Clegg, Integrity Consulting
RP11V8 – Chairman, John Martinez, Production Associates
RP11V9 – Chairman, Cleon Dunham
RP11V10 – Chairman, Steve Gossell, Saudi Aramco
RP11V11 – Chairman, Juan Carlos Mantecon, SPT GROUP
API Spec./RP Process
11V Task Group
determines need for new work
Work Group
chairman enlists
members
Work Group prepares an
API NWI (new work item)
Sub-Committee 11 approves
NWI
Work Group
develops the Spec /
RP
11V Task Group
requests SC11
approvalSub-
Committee 11 requests comments
and approval
from members
Spec. / RP is approved
and published
Spec. / RP is reviewed every 5 years
Revise, Reaffirm, Withdraw
Nominal Timeline for a document
Gas-Lift Specifications and Recommended Practices - Published
Specification (Spec)11V1 - Specification for Gas Lift Equipment (41
pages)*
Recommended Practice (RP)11V2 - Gas-lift Valve Performance Testing
(60)*
RP11V5 – Recommended Practice for Operations, Maintenance, and
Trouble-Shooting of Gas Lift Installations (34) Soon to be updated
RP11V6 – Recommended Practice for Design of Continuous Flow Gas
Lift Installations Using Injection Pressure Operated Valves (88)
RP11V7 – Recommended Practice for Repair, Testing, and Setting Gas
Lift Valves (26)*
RP11V8 – Recommended Practice for Gas Lift System Design and
Performance Prediction (94)
* To be replaced by ISO 17708-2
Gas-Lift Specifications and Recommended Practices – being developed
11V9 – Recommended Practice for Operation, Maintenance,
Troubleshooting and Design/Re-Design of Dual Gas-Lift Systems
11V10 – Recommended Practice for Design of Intermittent and
Chamber Gas-Lift Wells and Systems
Gas-Lift Specifications and Recommended Practices – New Work Item
Recommended Practice for Dynamic Simulation of Gas Lift Wells and Systems
RP – Dynamic Simulation od Gas Lift Wells and Systems – Team
Juan Mantecon, SPT Group - Chairperson
Cleon Dunham, Oilfield Automation - Secretary
Adam Ballard, BP
Arne Valle, Hydro
Dan Dees, AppSmiths
Egil Henrik Uv, Hydro
Fernado Ascencio Candejas, PEMEX
Dr. Fernando Samaniego, UNAM (Mexico Autonomous Nacional Uni)
Galileu Paulo Henke A. Oliveira, Petrobras
Greg Stephenson, ep-solutions
Kallal Arunachalam, ConocoPhillips
Ken Decker, Decker Technology
Murat Kerem, Shell
Shanhong Song, Chevron
Torbjørg Klara Fosum, Statoil
Yula Tang, Chevron
Content / Scope (1)
Purpose of this document Who is the target audience of this RP?
• Researchers • Engineers • Analysts • Operators
What are the objectives of this RP? • Science • Improved knowledge/awareness • Training • Improved designs • Improved operations • Other
Content / Scope (2)
• Typical Gas Lift Operations
• Continuous Gas Lift
• Dual gas-lift
• Gas-lift of gas wells
• Intermittent gas Lift • Single Point Gas Lift Injection
– Subsea Interventionless Gas Lift
– Well Kick-off
– Well Clean-up • Riser Gas Lift
• Dry Gas Injection
• When to start Gas Lifting
• Dynamic Simulation vs NODAL Analysis • Black Oil vs Fluid Composition
Content / Scope (3)
Flow Stability • Cause of Slugging Conditions • Slug Size and Frequency • Operational instability – heading • Determine cause(s) of heading • Determine possible cures
Water Accumulation • Corrosion Rate
• Corrosion Inhibition
Production Chemistry – Flow Assurance • Hydrates Dissociation/Formation
• Wax Appearance Pressure-Temperature
• Hydrates/Wax Avoidance Method • Pressure-Temperature Control • Remove Supply of Water • Hot-Cold Re-Start • Flowline Depressurization • Insulation •
Inhibition
Content / Scope (4)• Shut-in / Start-up
• Watercut Limit
• Liquid Loading
• Crossflow / Commingling Fluids
• Well design and Operations
• Horizontal Wells
• Multi-Lateral Wells
• Intelligent Wells
• Well-Clean-up
• Well Kick-off
• WAG Injection
• Integrated Modelling (well+flowline+riser) • Real-time Modelling
Content / Scope (5)
Recommended approaches to use dynamic simulation for gas-lift
Purposes of dynamic modeling of gas-lift wells • Design • Design confirmation • Problem identification • Problem diagnosis • Operational optimization
Recommended modeling techniques
Recommended ways to implement dynamic models
• Engineering studies • Operational systems
Case histories – how models are used, what are the benefits