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5.3 SUPPORTING INFORMATION

DECOMMISSIONING OPTIONS FOR THE PLATFORM TOPSIDES & PLATFORM JACKETS LEAVE IN SITU This is not a legally or environmentally acceptable option. REUSE IN SITU All these options are opportunity driven and can only be considered if the opportunity arises within the right time frame. There would be significant issues that would have to be resolved about ownership and responsibility of removal at the ultimate end of their useful life.   REUSE IN ANOTHER LOCATION This option requires the topsides to first be to shore removed, cleaned and revamped. Based on the cost implications, the option was rejected. REMOVE AND RECYCLE This is one of the most likely futures for the topsides because of the low probability of finding a suitable reuse opportunity.   RIGS TO REEFS DISPOSAL This might have been a practical option for the jackets.  However, the permits necessary for this method of disposal are not likely to be forthcoming foreseeable. DEEP SEA DISPOSAL This method of disposal is not legally acceptable in North East Atlantic waters. DELAY DECOMMISSIONING AWAITING NOVEL NEW TECHNOLOGY Initial research indicates that the equipment, if developed, is not likely to be available within a suitable time frame.

IDENTIFYING MATERIAL OPPORTUNITIES INVENTORY OF MATERIALS PLATFORM TOPSIDES ITEM

DESCRIPTION

WEIGHT IN TONNES

MATERIAL

1 2 3 4 5 6 7 8 9 10

STRUCTURAL STEEL PIPING VESSELS MECHANICAL EQUIPMENT ELECTRICAL & INSTRUMENT CABLES CABLE TRAYS ELECTRICAL CABINETS & EQUIPMENT HVAC/ARCHITECTURAL SAFETY (INCLUDES WATER PIPING) DECKING

712 460 237 156 5 24 14 1 61 24

CARBON STEEL CARBON STEEL CARBON STEEL CARBON STEEL PLASTIC COATED COPPER GALVANIZED STEEL MISCELLANEOUS MISCELLANEOUS CARBON STEEL TIMBER

TOTAL 1694 PLATFORM JACKETS 1 2 3 4 5

JACKET STRUCTURE PILES RISERS RISERS ANODES

945 190 0 0 15

CARBON STEEL CARBON STEEL CARBON STEEL SS DUPLEX ALUMINIUM ALLOY

TOTAL 1150

IDENTIFYING MATERIAL AVAILABILITY

FIELD DECOMMISSIONING SCHEDULE 2015

2016

2017

2018

2019

2020

2021

2022

Cessation of production Clean & make safe Well decommissioning Module segregation and pre-lifting Pipeline clearing Platform removal (window) Pipeline decommissioning (window) Onshore disposal (window) Debris clearance & final survey

RECYCLING DECOMMISSIONED NORTH SEA OIL RIGS FOR CONSTRUCTION MATERIAL The North Sea currently hosts more than 600 offshore oil and gas installations, many of which have been standing since the 1960s and 1970s. Many have exceeded their operational lifetime of 25 years. Many of the steel and concrete structures have also become obsolete. As a result they have become redundant and need to be removed.

The Guardian. Can North Sea Installations be recycled, or Decommissioned Sustainably. https://www.theguardian. com/sustainable-business/2014/dec/01/north-sea-installation-recycle-sustainable-reuse-oil-gas A Danish Field Platforms and Pipelines Decommissioning Programmes. http://www.offshoreenergy.dk/ June 2013 THE GRAND TOUR OF EUtopia

Danish Sustainable Offshore Decommissioning Project. Offshore Center Denmark. http://www.offshorecenter.dk/

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The Grand Tour of EUtopia. Design Realisation  

Relocating across memory to critique the contemporary European Union. The Grand Tour of EUtopia is a modern pilgrimage critiquing the role o...

The Grand Tour of EUtopia. Design Realisation  

Relocating across memory to critique the contemporary European Union. The Grand Tour of EUtopia is a modern pilgrimage critiquing the role o...

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