Decommissioning in Aker Solutions Experience and challenges INSTOK & SDI Technology Partnership Event, Aberdeen - 26.11.2015 Torleif Gram, Senior Vice President, Aker Solutions MMO

Content Industry context Our history Our business 25 April, 2019

Overall market in North Sea 42 platforms removed since 1996 Assuming 90% of the installations to be removed coming 30 years 25 April, 2019

Split between UK / Norway 25 April, 2019

Cessation cost distribution - UK Resource breakdown structure average UKCS expenditure (2014-2022) Kilde: Oil & Gas UK 25 April, 2019

Typical timeline for a cessation project -5 -4 -3 -2 -1 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Management anticipation CoP (5-10 years in advance) Basic engineering Basic Engineering (removal) Establish strategies and goals Retrieve & organise platform data Carry out inspections Studies/Method Statements Risk Assessments Input to decisions and plans Cessation plan / decommissioning programme to Authorities Sourcing Cessation of production P&A (incl. conductors) Facility / pipeline making safe and topsides preparation Removal Recycling CoP 25 April 2019

Traditional Model - Tier 1 Contractors in UK O&M contract Disposal Decommissioning service contract De-energise platform Clean and remove oils and fuels Install temporary systems Prepare platform for NUI mode Technical Authority Removal contract E&C contract P&A contract Subsea contract Time 25 April, 2019

DSC part of O&M O&M contract Disposal Removal contract E&C contract Decommissioning service contract De-energise platform Clean and remove oils and fuels Install temporary systems Prepare platform for NUI mode Technical Authority Removal contract E&C contract P&A contract Subsea contract Time 25 April, 2019

DSC part of E&C contract O&M contract Disposal Decommissioning service contract De-energise platform Clean and remove oils and fuels Install temporary systems Prepare platform for NUI mode Technical Authority Removal contract E&C contract P&A contract Subsea contract Time 25 April, 2019

Content Industry context Our history Our business 25 April, 2019

Decommissioning – Our reference list Esso Odin EPRD Phillips Maureen A EPRD TOTAL Frigg & MCP01 EPRD 1995-1997 1998-2002 2004-2009 BP Old Valhall DSC TENAS Yme DSC CNRI Murchison DSC ExxonMobil Jotun B DSC Continuous business for 20 years Partnership with Saipem for 15 years to 2011 2010-2015 2012-2015 2013-2016 2015-2016 25 April, 2019

Maureen A Substructure prior to installation 25 April, 2019

The BTA method is proven through Frigg DP2 jacket removal 12.000 tonnes Decommissioning in Aker – Our perspective

Positive experiences Continuous HSE focus works – last eight years without LTI (three million man-hours) Well-defined platforms were a success All major marine and heavy lift campaigns on all projects successfully performed offshore and onshore Maureen A: High focus (technical and commercial) on re-floating the platform from seabed – worked as planned Innovative solutions - BTA and FlexSeaFast® solved challenges We are prepared for the known risks – How to be sufficiently prepared for the unknown risks? 25 April, 2019

Unknown risks in our decommissioning projects Odin (1995 - 1997) Cutting of piles Maureen (1998 – 2002) Lack of HSE culture by tug supplier (2 fatalities) Cleaning of wax in tanks prior to reuse MCP01 & CDP1 (2004 – 2009) Platform deterioration caused by low maintenance for more than ten years More hazardous materials than declared Was not hydrocarbon free (planned with cold work) QP Asbestos in ceiling preventing use to use as planned General Frigg Consequence costs for more complex preparation work offshore (flotel, revised lifting schedule and more man-hours) Busy market (high oil price) Preparation for removal (lifting) is the challenge 25 April, 2019

Contract models EPRD E+P+R+D Suitable for Suitable for Small/medium sized module based topsides Cost Removal > Cost Eng/Prep Reverse installation or single lift Typical HL Contractor E+P+R+D Suitable for Large complex integrated topsides Cost Removal < Cost Preparations Various removal methods 25 April, 2019

Content Industry context Our history Our business 25 April, 2019

Decommissioning of North Sea Our decom mission is to create value to our Clients by solving their decom obligations in the North Sea. 25 April, 2019

Service offering today – balanced risk Products Description 1) Cessation obligations assessment High level study to reveal regulations and estimate decom costs Typical utilisations: Corporate balance sheets, valuation of assets at sales or acquisitions 2) Decom engineering services Consulting services Engineering studies, all levels as appreciation, concept, FEED and detail 3) Decom service contracts (DSC) Engineering down inclusive cleaning, hydrocarbon free and energy free Material management Modifications and preparations for removal 4) New: project execution assistance Services to Company or removal contractor Project execution systems Project execution management and engineering services 5) New: removal service contracts Services to a removal contractor Preparations for removal 25 April, 2019

DSC as part of decommissioning process Production CoP Eng down Prepare for removal NUI Removal DRILLING Drilling Well operations P&A Cleaning Conductors FACILITY OPERATIONS Logistics Safety Catering Logistics Safety (cases) Catering PRODUCTION Maintain & upgrade systems Maximise throughput Engineering down Modifications Shutdown REMOVAL Temporary systems Preparations Removal Decommissioning service contract 25 April 2019

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