Murchison and Beyond John Allan Development and Decommissioning Projects Manager CNR International Late Life and Decommissioning
Murchison Decommissioning Update John Allan Development and Decommissioning Projects CNR International
Contents Murchison Project Overview Lessons learned Personal Challenge for future projects Future projects 3
Murchison Installation Installed 1980 Cross border field; 78% UK / 22% Norway Weight of steel jacket and piles 26,400 tonnes Weight of topsides 24,584 tonnes installed in 24 modular lifts Accommodation for 192 personnel Water depth 156m 33 platform wells 3 subsea wells 4
Murchison before 5
Murchison after 6
Plan the work work the plan 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 CoP Approved Approved DP Decommissioning programme preparation and approval Start Project Draft DP CoP MUR unmanned Q1 2016 Well P&A, conductor removal Well P&A Cleaning, engineering down, preps for removal Topsides removal Jacket removal Subsea removal Onshore recycling and disposal MS/2 subsea well P&A 7
Murchison downmanned at 31 st March 2016 Platform wells plugged and abandoned Pipelines disconnected / isolated Platform process cleaned Utility fluids run down Electrically isolated Crane booms and rig parked in removal positions Solar powered Nav Aids installed 8
The last day the last crew 9
Removal Service Contract Consortium Heerema Marine Contractors SE & AF Decom Offshore = HAF Changes to topsides removal methods & programmes: Original: Piece small with reverse installation Reaction to schedule impacts: Full reverse installation over 2016 & 2017 Vessel availability: Full reverse installation in 2016 10 10
Offshore Execution Starts June 2016 CNRI Duty Holder and Safety Case Owner Works executed to contractor s Safe System of Work Overseen by CNRI OIM Area authorities HSE rep Contract rep Marine Warranty Surveyors (MWaves on behalf of CNR) Emergency Response on scene led by contractor with primacy taken by one vessel captain. Support & platform knowledge provided by OIM 11
2016 summer campaign it ll be fun 12
Lessons Learned Fixed COP Date. Fixed down-man. Flexible window. Early, proactive engagement with stakeholders Early listening engagement with contracting community Early start of well plug and abandonment Rig-less start. Rig based with mast. Flexibility- MOC Minimise brownfield engineering After COP all Hi-Po rigging/lifting incidents. No H/C related. Genuine, constructive relationship with contractors Dedicated project team but strong alignment with functions Diverse- SHE, schedule, cost focused - project team Constant cost challenge on everything push for technical limit Make it fun attract talent 13
Personal Challenge Future projects we push for 50% reduction on Murchison cost Beat our ARO numbers. Lessons learned on each project and learn from others Push for marginal gains across all stages of project Collaboration across industry Keep it fun and fresh 14
Future projects - Cost reduction Timing Fixed COP reduce time to down-man Search opportunities to batch - collaboration Flexibility in removal windows Push jackets out Scope Constant challenge of scope keep it simple Cleanliness What is doing it right Execution Production line approach Strong constructive engagement with contract community Strong project teams Continuous improvement apply lessons learned Constant push to deliver technical limit 15