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