WG05: Well Abandonments CSOEM – SC 10 – Subcommittee on Well Cements 2016 Exploration & Production Winter Standards Meeting Austin, TX Joe Shine – Chair 20 Jan 2016

Outline Recap Participation Document outline proposal Discussions Distributions-Assignments Forward Plans Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM2

Recap Gap analysis performed and identified:  Cement placement, applications  Cementing materials, applications  Circumferential coverage envelope  Risk categorization and requirements  TP&A requirements, monitoring program, decommissioning Areas of interest not well documented:  Highly deviated or near horizontal placement  HT-HP, Corrosive, or other environments  Liner laps and liner hanger types influence  Long term zonal isolation requirements 3Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

Recap Create industry referenced document for “P&A”  Onshore and offshore applications Jan 2016, Austin, Texas  Initial kick-off/working meeting for WG05  Outline proposal based on literature review  Create leads for each section with members 4Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

Participation Chevron BP ConocoPhillips Repsol Southwestern Shell Oxy ExxonMobil Saudi Aramco Baker Hughes Schlumberger Halliburton Cement Testing Equipment Jerry Calvert Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM5

Document outline proposal Life cycle approach  Currently five (5) “working” sections Section I – Well status and operations Section II – Applications and operating variables Section III – Material consideration for barriers Section IV – Installation and laboratory testing Section V – Evaluation and verification criteria Section VI - Appendix 6Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

I. Well status and operations a.Drilling b.Work-over/re-entry c.TP&A/P&A d.Decommissioning e.Risk categorization/management 7Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

II. Applications and operating variables a.Formation types (flow zones, hydrocarbons, aquifers) b.Length/positions (risk categorization) c.Temperature and pressure d.Wellbore profile/deviation e.Long term zonal isolation f.Well location (onshore, offshore) g.Radioactive sources 8Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

III. Material consideration for barriers a.Cementitious b.Non-cementitious c.Mechanical (packers - all, liner laps, hangers) d.Natural (geo-formations, etc.) e.Environment (corrosive, HT-HP, etc.) 9Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

IV. Installation and laboratory testing a.Circumferential coverage (define) b.Wellbore geometry (OH, CH, stubs, liner laps) c.Placement methods/best practices i.Plugs ii.Squeezes d.Placement simulations (software) e.Laboratory testing 10Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

V. Evaluation and verification criteria a.Circumferential coverage (success criteria) b.Wireline logs c.Pressure matching d.Physical/mechanical testing e.Hydraulic testing (positive, negative) 11Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

Discussions 12Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

Distribution-Assignments Based on current outline proposed… Each section to have one “lead”  Operator or cementing service company  Reporting to chair Collect from participating WG members:  information, data, knowledge and points of interest Work with chair:  Compile/populate/build out each sub sections 13Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

Distribution-Assignments Volunteers  I – Well status and operations (?)  II – Applications and operating variables (?)  III – Material consideration for barriers (?)  IV – Installation and laboratory testing (?)  V – Evaluation and verification criteria (?) 14Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

Forward Plans Conference call with WG leads Re-visit section outline, scope Determine methods for populating sections Begin workgroup operations 15Joe Shine - WG WA E&P Summer Std Mtg – SC10 - CSOEM

WG Charge “Identify literature and gaps associated with well plugging and abandonment for both offshore and onshore environments. Present findings to serve as foundation to develop a RP” 16Joe Shine - WG WA E&P Winter Std Mtg – SC10 - CSOEM

17Joe Shine - WG WA E&P Summer Std Mtg – SC10 - CSOEM