Decommissioning: Winds of Change in Offshore Oil & Gas - PowerPoint PPT Presentation

Decommissioning: Winds of Change in Offshore Oil & Gas Accelerating NAMEPA & NOIA Winds of Change in Offshore Oil and Gas February 2014 Accelerating 1 1

Oil & Gas Decommissioning – Winds of Change Accelerating What has changed? Idle-Iron NTL became effective: October 2010 Structures removed from the OCS: • 2002 – 2010: Averaged 164 Gulf ¡of ¡Mexico ¡-­‑ ¡Outer ¡ConDnental ¡Shelf ¡ Decommissioned ¡Structures ¡ 300 ¡ 250 ¡ No. ¡Structures ¡Removed ¡ • 2011 – 2013: Averaged 262 200 ¡ 150 ¡ • 60% Increase post Idle-Iron 100 ¡ 50 ¡ 0 ¡ 2002 ¡2003 ¡2004 ¡2005 ¡2006 ¡2007 ¡2008 ¡2009 ¡2010 ¡2011 ¡2012 ¡2013 ¡ Total ¡Removed ¡ Avg. ¡Removed ¡'02-­‑'10: ¡ Avg. ¡Removed ¡'11-­‑'13: ¡ 2

Stone Decommissioning – January 2011 Accelerating Work Scope ~ 100 Structures & 130 Wells Single-Well Caissons Multi-Well Caissons Braced Caissons Tri-Pods 4-Pile Structures Estimated Cost: $235 million 36-Pile Structure 6-Pile Structures over 3 years 3

Oil & Gas Decommissioning – Winds of Change Accelerating What needed to change? The Decommissioning Process Traditional Mini-Van Method 4

Oil & Gas Decommissioning – Process Evolution Accelerating Mini-Van Method Multiple Mobilizations – Sequential Steps: 1. Prepare the structure 2. Plug the wells 3. Sever & remove the well conductors (casings) 4. Flush, pig and remove the pipelines 5. Hydrocarbon-free the production equipment 6. Mobilize derrick barge to remove the structure 7. Perform Site Clearance 5

Mini-Van Method – Explosives to remove the Well Accelerating • After well is plugged with required number of cement barriers • Explosives used to sever all well conductors > 15’ BML 6 6

Mini-Van Method: Structure Removal via Derrick Barge Accelerating 7

Mini-Van Method: Explosives to remove the Jacket Accelerating • Explosives to Sever Jacket Piles > 15’ BML 8

Oil & Gas Decommissioning – Winds of Change Accelerating What has changed? The Decommissioning Process New Stone Energy Old School Method Mini-Van Method 9

Oil & Gas Decommissioning – Process Evolution Accelerating New Stone Energy Method Single Mobilization – Concurrent Steps: 1. Perform all work in one or two mobilization(s) 2. Utilize the newest technologies 3. Utilize fewer resources – Decommissioning Department of 7 (1 - Manager; 2 - Project Managers; 2 - Engineers; 1 - Regulatory Specialist; 1 - Administrative Assistant) 4. Complete the work scope in ½ the time 5. Spend ⅓ less money 6. Safer, Leaner, Greener and Less Expensive 10

\ New Technology: 335’ Liftboat Robert Accelerating § Operating water depths of 18’ to 280’ § Accommodations for 152 Workers § 15,200 ft ² Clear Deck Space § 500 Ton Heavy Lift Crane 11

New Stone Method Step 1: Mobilize all equipment Accelerating Stone Method • Platform make-safe • Plug wells • Flush & pig pipelines • Remove pipeline tube-turns • Hydrocarbon free vessels • Remove production equip. • Abrasively sever conductors 12

New Stone Method Step 2: Perform Work in Parallel Accelerating Stone Method • Abrasively sever jacket • Diver debris sweep • Acoustic bottom scan 13

New Stone Method Step 3: Take Structure Away Accelerating Stone Method • Secure to Material Barge • Move to next location 14

Stone Decommissioning Method: Greener Accelerating = No Harm to Marine Environment 15

Stone Decommissioning Method: Less Expensive Accelerating 6 Spreads; 6 Mobilizations 6 Spreads; 1 Mobilization 42 Days of Work over a 22 Days of Work over a 10 Month Period . . . 22 Day Period . . . Spend: $2,401,000 Spend: $3,557,000 Mini-Van Method Stone Method 16

New Technology: Internal Abrasive Cutting Accelerating Abrasive Jet Nozzle 17

New Technology: Internal Abrasive Cutting Accelerating 18

Old Technology: Horizontal Diamond Wire Saw Accelerating 60’ 60’ 18’ Diamond ¡Wire ¡Saw ¡Moun0ng ¡ 19

New Technology: Articulating Diamond Wire Saw Accelerating Running Position 10’ 10’ 3’ Post-Cut Position 16’ 7’ 20

New Technology – Articulating Diamond Wire Saw Accelerating Mud Line Diamond Wire 21

New Technology: Excavation Accelerating Stone Method Mini-Van Method New Auger Dredge Diver Jet Wand and Air Lift 22

New Stone Method Accelerating Stone Energy Decommissioning Method 23

New Stone Method: Fast - 94 Locations in 590 Days Accelerating 24

New Stone Method: Regulatory Excellence Accelerating 86 Structure Removal Permits w/ Site Clearance Plan 86 Structure Removal Final Reports 59 Pipeline Abandonment Permits 59 Pipeline Abandonment Final Reports 46 Well TA Application for Permit to Modify (APM) 44 Well Revised Permit to Modify (RPM) 157 Well PA Application for Permit to Modify (APM) 310 Weekly Activity Reports (WAR) 203 End-of-Operations Reports (EOR) 284 Rig-Move Notifications (RMN) 86 Site Clearance Verification Reports 86 NavAid Discontinuation Reports 1506 Regulatory Filings (3.6 Every Business Day) 25

New Stone Method: Accomplishments Accelerating Results – 20 Months • 86 - Structures Removed • 157 - Wells PA’d Zero Recordable • 59 - Pipelines Abandoned • 1,115 - Air/Mixed Gas Dives Incidents • 330 - Internal Abrasive Cuts • 40 - External Abrasive Cuts • > 420,000 Man-Hrs Worked 26

Stone Method: Safer, Greener, Less Expensive Accelerating 2013 Safer, Leaner, Greener and Less Expensive 27

Stone Method: Accomplishments Accelerating Traditional vs. Stone Decommissioning Methods Actual Cost: Estimated Cost: $155 million $235 million 28

Stone Method: Safer, Greener, Less Expensive Accelerating 2013 Questions? Safer, Leaner, Greener and Less Expensive 29