Detailed guide: Oil and gas: decommissioning of offshore installations and pipelines

The decommissioning of offshore oil and gas installations and pipelines on the United Kingdom Continental Shelf (UKCS) is controlled through the Petroleum Act 1998.

The responsibility for ensuring that the requirements of the Petroleum Act 1998 are complied with rests with the Offshore Petroleum Regulator for Environment and Decommissioning (OPRED) which sits within the Department for Business, Energy and Industrial Strategy.

Owners of oil and gas installations and pipelines are required to decommission their offshore infrastructure at the end of a field’s economic life and the 1998 Act requires owners to set out the measures to decommission disused installations and/or pipelines in a decommissioning programme.

A decommissioning programme must identify all the items of equipment, infrastructure and materials that have been installed or drilled and describe the decommissioning solution for each.

OPRED aims to be transparent in its consideration of decommissioning programmes. As a result members of the public, other organisations, non-governmental organisations and other government departments or agencies are invited to comment on the proposals set out in a programme.

Details of the current programmes under consideration are noted in the table below.

OPRED provides guidance on the regulatory requirements for decommissioning. Final guidance on the Environmental Considerations for Decommissioning (Section 12) has now been incorporated into the guidance notes Offshore Oil and Gas Decommissioning Guidance Notes November 2018 (PDF, 1.27MB, 138 pages) .

Consultation on our Financial Assurance Guidance for the Decommissioning of Offshore Oil and Gas Installations and Pipelines concluded on 31 March 2019. Comments are being addressed and a final draft will be published in due course. Draft Financial Assurance Guidance (PDF, 300KB, 17 pages)

The guidance outlines how the government assesses the financial capability of persons with a relevant interest in or considering taking an interest in an offshore oil or gas field. For the purposes of satisfying the Secretary of State that that person will be capable of carrying out a decommissioning programme in relation to that interest.

It explains our financial assurance policy and existing processes setting out the steps taken to assess the financial health of offshore oil and gas companies with an interest or potential interest in a field, outlining how and when we may use the statutory powers set out in the Petroleum Act 1998.

If you have any comments or questions relevant to the guidance, please email us at odu@beis.gov.uk.

Field Name Field Operator Status Main points of the programme Details Pickerill A&B Installations Pereno Gas (UK) Limited Draft programme under consideration Topsides and jackets will be removed and transported to shore for re-use, recycling or disposal. All wells will be plugged and abandoned. Pickerill A&B Installations DP (PDF, 1.77MB, 52 pages)
Pickerill A&B Installations EA (PDF, 5.33MB, 122 pages) MacCulloch Field ConocoPhillips (U.K.) Limited Draft programme under consideration All subsea installations to be recovered to shore for reuse or recycling. All wells will be plugged and abandoned. All pipelines to be recovered to shore for reuse or recycling. All concrete mattresses and grout bags will be recovered to shore for re-use or recycling. All anchor chains will be recovered and returned to shore for reuse or recycling. All anchors will be decommissioned in situ. MacCulloch Field Decommissioning Programmes (PDF, 834KB, 34 pages)
MacCulloch Field Comparative Assessment (PDF, 2.04MB, 92 pages)
MacCulloch Field Environmental Appraisal (PDF, 7.07MB, 162 pages) Dunlin Alpha to Cormorant Alpha Pipeline - PL5 Fairfield Betula Limited Draft programme under consideration Decommissioning in situ of trenched sections of PL5 with exposed pipeline ends cut and recovered and severed ends rock dumped. Anode skids, spools and partially buried mattresses will be recovered to shore for disposal. Groutbags, buried mattresses and existing rock cover will be decommissioned in situ. PL5 Decommissioning Programme (PDF, 4.37MB, 67 pages)
PL5 Comparative Assessment (PDF, 3.69MB, 86 pages)
PL5 Environmental Appraisal (PDF, 3.21MB, 124 pages) Juliet Field Neptune E&P UKCS Limited Draft programme under consideration The Juliet Manifold and Wellhead Protection structure will be fully recovered to shore for reuse/recycling. The trenched and buried pipeline and umbilical will be decommissioned in situ. Surface laid sections of pipeline and umbilical such as tie in spools and control jumpers will be recovered to shore for reuse/recycling. Exposed mattresses and grout bags will be recovered to shore for reuse/recycling. Wells will be plugged and abandoned. Juliet Decommissioning Programmes (PDF, 1.76MB, 44 pages)
Juliet Comparative Assessment (PDF, 3.94MB, 46 pages)
Juliet Environmental Appraisal (PDF, 13.9MB, 142 pages) Minke Field Neptune E&P UKCS Limited Draft programme under consideration The Minke Wellhead Protection Structure will be removed and recovered to shore for reuse/recycling. The trenched and buried pipeline and umbilical will be decommissioned in situ. Small surface laid sections of pipeline and all exposed mattresses and grout bags will be recovered to shore for reuse/recycling. Wells will be plugged and abandoned. Minke Decommissioning Programme (PDF, 1.38MB, 48 pages)
Minke Comparative Assessment (PDF, 2.67MB, 42 pages)
Minke Environmental Appraisal (PDF, 13.1MB, 117 pages) Morecambe DP3/DP4 Spirit Energy Production UK Limited Draft programmes under consideration Topsides and jackets will be removed and transported to shore for recycling. All wells will be plugged and abandoned. Buried pipelines will be left in situ except the exposed ends which will be cut and removed. All exposed grout bags will be recovered to shore for re-use, recycling or re-use. All exposed concrete mattresses will be recovered to shore for re-use, recycling or disposal. Existing rock will be left in situ. Morecambe DP3/DP4 Decommissioning Programmes (PDF, 2.94MB, 47 pages)
Morecambe DP3/DP4 Comparative Assessment (PDF, 3.23MB, 57 pages)
Morecambe DP3/DP4 Environmental Appraisal (PDF, 6.68MB, 103 pages) Schooner and Ketch Faroe Petroleum (ROGB) Limited Draft programmes under consideration Removal to shore of the Schooner and Ketch topsides, jackets and subsea installation for recycling/disposal or possible reuse option for the topsides and jackets as offshore windfarm support facilities. Wells will be plugged and abandoned. Pipelines will be trenched and buried and decommissioned in situ. The trenched and/or buried sections of pipelines will also be decommissioned in situ. Surface laid mattresses and stabilisation features will be recovered to shore for reuse, recycling or disposal. Ketch Decommissioning Programme (PDF, 3.65MB, 61 pages)
Ketch Comparative Assessment (PDF, 13.1MB, 59 pages)
Schooner Decommissioning Programme (PDF, 5.53MB, 62 pages)
Schooner Comparative Assessment (PDF, 9.59MB, 63 pages)
Schooner and Ketch Environmental Appraisal (PDF, 6.28MB, 220 pages) Goldeneye Shell U.K. Limited Draft programmes under consideration Removal to shore of the Goldeneye topside and jacket for recycling/disposal. Wells will be plugged and abandoned. The large surface laid sections of pipeline will be trenched and buried and decommissioned in situ. The trenched and/or buried sections of pipelines will also be decommissioned in situ. The pipeline ends at the platform will be flanged, buried and/or remediated with rock cover. The Goldeneye umbilical will be recovered to shore for recycling/disposal. Surface laid mattresses and stabilisation features will be recovered to shore for recycling/disposal. Goldeneye Decommissioning Programmes (PDF, 2.35MB, 50 pages)
Goldeneye Environmental Appraisal (PDF, 4.97MB, 126 pages)
Goldeneye Comparative Assessment (PDF, 5.28MB, 69 pages) Dunlin Alpha Field Fairfield Betula Limited Draft programme under consideration Decommissioning in situ of Dunlin Alpha concrete gravity based structure and storage cells. Dunlin Alpha Decommissioning Programme (PDF, 6.5MB, 77 pages)
Dunlin Alpha Decommissioning Comparative Assessment Report (PDF, 3.66MB, 133 pages) Dunlin Alpha Decommissioning Environmental Appraisal (PDF, 5.04MB, 155 pages) Windermere Field INEOS UK SNS Limited Draft programmes under consideration Topsides and jacket will be removed and recycled or disposed onshore. The pipelines will be partially removed, the exposed sections adjacent to the platforms will be removed and recycled or disposed onshore. The exposed ends will be lowered to achieve adequate depth of coverage. The existing buried sections of umbilical will be left in situ. All concrete mattresses and grout bags will be recovered to shore for reuse, recycling or disposal. Windermere Decommissioning Programme (PDF, 2.39MB, 38 pages)
Windermere Comparative Assessment (PDF, 1.49MB, 34 pages) Windermere Environmental Statement (PDF, 10.2MB, 235 pages) East Brae and Braemar Marathon Oil UK LLC Draft programmes under consideration Removal of East Brae topsides and removal of jackets to the top of the footings. Removal of Braemar subsea installations. Pipelines to be decommissioned by partial removal and leave in situ. East Brae And Braemar Decommissioning Programmes (PDF, 10.3MB, 74 pages)
East Brae and Braemar Environmental Statement – Main Report (PDF, 14.5MB, 78 pages) East Brae and Braemar Environmental Statement – Technical Appendices (PDF, 12.8MB, 96 pages) East Brae Substructures Comparative Assessment (PDF, 1.78MB, 30 pages) Brae Area Subsea Assets Comparative Assessment (PDF, 6.84MB, 43 pages) Brae Alpha, Brae Bravo, Central Brae, West Brae and Sedgwick Marathon Oil UK LLC Draft programmes under consideration Removal of Brae Alpha and Brae Bravo jackets to the top of the footings. Removal of Central Brae, West Brae and Sedgwick subsea installations. Pipelines to be decommissioned in a variety of ways including removal, trenching and leave in situ. Brae Alpha, Brae Bravo, Central Brae, West Brae and Sedgwick Decommissioning Programmes (PDF, 15.3MB, 120 pages)
Brae A etc, Environmental Statement – Main Report (PDF, 14.6MB, 80 pages) Brae A etc. Environmental Statement - Technical Appendices (PDF, 13.3MB, 96 pages) Brae A Substructure Comparative Assessment (PDF, 1.7MB, 30 pages) Brae B Substructure Comparative Assessment (PDF, 1.59MB, 30 pages) Brae Area Subsea Assets Comparative Assessment (PDF, 6.84MB, 43 pages) Brent Shell U.K. Limited Draft programmes under consideration Removal of upper part of Brent Alpha steel jacket to 84.5m below sea level. Decommissioning in situ of Brent Alpha jacket footings. Decommissioning in situ of Brent Bravo, Charlie and Delta concrete gravity based structures. Pipelines several decommissioning options. Brent Decommissioning Programme (PDF, 12MB, 322 pages)
Brent ES (PDF, 12.5MB, 475 pages)
Brent EIA (PDF, 5.05MB, 429 pages)
Brent ES Appendix (PDF, 2.52MB, 45 pages) A suite of detailed Technical Documents which support the Decommissioning Programmes documents are available on the Shell Website Atlantic and Cromarty BG Global Energy Limited and Hess Limited Draft programmes under consideration Manifold and Well head Protection structures (WHPS) to be removed for recycling/disposal. Partial removal of pipelines and remaining section of buried/trenched pipelines to remain in situ. Atlantic & Cromarty Decommissioning Programmes (PDF, 1.76MB, 50 pages)
Atlantic & Cromarty Stakeholder Report (PDF, 1.11MB, 32 pages)
Atlantic & Cromarty Environmental Impact Assessment (PDF, 4.5MB, 109 pages)
Atlantic & Cromarty Comparative Assessment (PDF, 2.06MB, 110 pages)
Field Name Operator at approval Operator following licence / company change Main installations decommissioned Approved option Year of approval Ninian Northern Platform (PDF, 2.34MB, 70 pages) CNR International (U.K.) Limited - Large Steel Platform Topsides and jacket to top of footings to be removed to shore for recycling/disposal. Footings to remain in situ. June 2019 Nevis N11 WHPS (PDF, 1.66MB, 26 pages) Apache Beryl I Limited - Nevis N11 WHPS Removal to shore for re-use or recycling June 2019 Dunlin Alpha Topsides (PDF, 4.97MB, 44 pages) Fairfield Betula Limited - Dunlin Alpha Topsides Removal to shore for recycling or disposal May 2019 Hewett (PDF, 1.5MB, 21 pages) Eni Hewett Limited - Vent Stack (2 x 19m pipes) & other preparatory works on 48/29B Platform & PL84 Removal to shore for recycling or disposal April 2019 Pickerill A & B (PDF, 1.26MB, 21 pages) Perenco Gas (UK) Limited - Telecommunication towers, sub-cellar deck equipment, appurtenances, caissons, associated tanks and lift pumps, supply hoses, a pipeline riser emergency shutdown valve and tertiary steelwork Removal to shore for reuse, recycling or disposal March 2019 Curlew B, C and D (PDF, 2.4MB, 61 pages) Shell U.K. Limited - FPSO Removal to shore for recycling/disposal March 2019 Subsea Installations Removal to shore for recycling/disposal March 2019 Pipelines Removal to shore for either re-use or recycling; buried pipelines to be left in-situ March 2019 Viking Platforms, Vixen and associated Pipelines (VDP2) (PDF, 33.3MB, 84 pages) ConocoPhillips (U.K.) Limited - Viking Satellites KD, LD, AR, Viking Bravo Hub BA, BC, BP, BD and Vixen sub-sea tieback Removal to shore for re-use, recycling or disposal January 2019 Pipelines Decommissioned in situ January 2019 Victor (VDP3) (PDF, 21.1MB, 55 pages) ConocoPhillips (U.K.) Limited - Victor Platform and subsea installation Removal to shore for re-use, recycling or disposal January 2019 Pipelines Decommissioned in situ January 2019 Tyne South Installations (PDF, 1.83MB, 42 pages) Perenco UK Limited - Topsides, jacket and subsea installation Removal to shore for reuse, recycling or disposal January 2019 Guinevere Installation (PDF, 2.05MB, 43 pages) Perenco UK Limited - Topsides and jacket Removal to shore for reuse, recycling or disposal January 2019 Beatrice Decommissioning Programmes (PDF, 4.45MB, 88 pages) Repsol Sinopec Resources UK Limited - Beatrice AP Topsides; AD, Bravo and Charlie Platforms and AD Drilling Template Removal to shore for re-use/recycling January 2019 Pipelines Buried pipelines will be left in situ. Remediation for any exposed sections. January 2019 Bains Decommissioning Programmes (PDF, 2.57MB, 36 pages) Spirit Energy Production UK Limited - Subsea Installation Removal to shore for re-use/recycling January 2019 Pipelines Decommissioned in situ January 2019 Jacky (PDF, 2.34MB, 52 pages) Ithaca Energy (UK) Limited - Wellhead Platform and Midline Tee Structure Removal to shore for either re-use or recycling October 2018 Pipelines Pipelines are trenched and buried and will be left in situ October 2018 Brae Bravo Topsides, Flare Bridge, Flare Tower and Flare Jacket and Substructure (PDF, 4.9MB, 52 pages) Marathon Oil UK LLC - Brae Bravo Topsides, Flare Bridge, Flare Tower and Flare Jacket/Substructure Removal to shore for either re-use or recycling August 2018 Brent Alpha, Bravo and Charlie Topsides (PDF, 3.34MB, 81 pages) Shell U.K. Limited - Brent Alpha, Brent Bravo and Brent Charlie Topsides Removal to shore for recycling/disposal August 2018 Stirling A33 WHPS Decommissioning Programme (PDF, 1.13MB, 27 pages) Stirling WHPS Close Out Report (PDF, 2.57MB, 15 pages) Premier Oil E&P UK Limited - Subsea installation Removal to shore for recycling May 2018 Ann and Alison (PDF, 2.98MB, 60 pages) Spirit Energy North Sea Limited - Subsea installations Removal to shore for either re-use or recycling April 2018 Pipelines Buried and stable pipelines left in situ. Surface laid pipelines removed to shore for re-use or recycling April 2018 Saturn (Annabel) (PDF, 2.49MB, 47 pages) Spirit Energy North Sea Limited - Subsea installations Removal to shore for either re-use or recycling April 2018 Pipelines Buried and stable pipelines left in situ. Surface laid pipelines removed to shore for re-use or recycling April 2018 Audrey (PDF, 2.87MB, 58 pages) Spirit Energy North Sea Limited - 2 fixed platforms Removal of topsides and jackets to shore for recycling or disposal April 2018 Pipelines Buried and stable pipelines decommissioned in situ. Surface laid pipelines removed to shore for re-use or recycling April 2018 Rev Decommissioning Programme (PDF, 12MB, 42 pages) Repsol Norge AS - Pipelines Fully buried and stable pipeline to be left in situ. All other pipelines to be removed. All mattresses on pipelines to be removed April 2018 Markham ST-1 (PDF, 2.39MB, 49 pages) Centrica Production Nederland B.V. - Fixed Platform Removal to shore for either re-use or recycling February 2018 Pipelines Two pipelines to be decommissioned in situ February 2018 Osprey (PDF, 3.92MB, 68 pages) Fairfield Fagus Limited - Subsea Installation Removed and recovered to shore for recycling/disposal December 2017 Pipelines Full removal with the exception of the Bundles, Umbilical Risers within the Dunlin Alpha Concrete Gravity Based Structure or those trenched and rock dumped December 2017 Merlin (PDF, 2.97MB, 56 pages) Fairfield Fagus Limited - Subsea Installation Removed and recovered to shore for recycling/disposal December 2017 Pipelines Full removal with the exception of trenched and rock dumped Pipelines and Umbilicals and Umbilical Riser within the Dunlin Alpha Concrete Gravity Based Structure December 2017 Dunlin Fuel Gas Import (DFGI) and Dunlin Power Import (DPI) (PDF, 3.48MB, 54 pages) Fairfield Fagus Limited - Subsea Installation Removed and recovered to shore for recycling/disposal December 2017 Pipelines Full removal with the exception of trenched and buried Pipelines and Rigid Riser and Riser Cable within the Dunlin Alpha Concrete Gravity Based Structure December 2017 Viking Satellites CD, DD, ED, GD, HD Pipelines (PDF, 6.77MB, 32 pages) ConocoPhillips (U.K.) Limited - Pipelines All pipelines and associated mattresses to remain in situ November 2017 LOGGS Satellites Vulcan UR, Viscount VO, Vampire OD - LDP1 (PDF, 17.5MB, 61 pages) ConocoPhillips (U.K.) Limited - 3 x fixed platforms - Vulcan UR, Viscount VO and Vampire OD Removal to shore of topsides and jackets for recycling/disposal November 2017 Pipelines All pipelines and associated mattresses to remain in situ November 2017 Leman BH Decommissioning Programme (PDF, 4.66MB, 46 pages) Leman BH Close Out Report (PDF, 1.71MB, 25 pages) Shell U.K. Limited - 1 x platform Removal to shore for either re-use or recycling April 2017 Close Out Report Approved March 2019 Ettrick and Blackbird (PDF, 2.1MB, 62 pages) Nexen Petroleum UK Limited - FPSO Removal for re-use at different location March 2017 Subsea Equipment Removal to shore for either re-use or recycling March 2017 Pipelines Removal to shore for either re-use or recycling; buried pipelines to be left in-situ March 2017 Ann A4 Decommissioning Programme (PDF, 1.37MB, 29 pages) Centrica North Sea Limited - A4 Wellhead Protection Structure Removal to shore for either re-use or recycling February 2017 Janice James & Affleck (PDF, 3.8MB, 115 pages) Maersk Oil UK Limited - FPSO Removal for recycling September 2016 Subsea Equipment Removal to shore for either re-use or recycling September 2016 Pipelines Removal to shore for either re-use or recycling; buried pipelines to be left in-situ September 2016 Athena Decommissioning Programmes (PDF, 3.88MB, 70 pages) Ithaca Energy (UK) Limited - FPSO Removal for re-use at different location September 2016 Subsea Equipment Removal to shore for either re-use or recycling September 2016 Pipelines All 32 pipeline to be removed and returned to shore for re-use or recycling September 2016 Viking Platforms (PDF, 3.53MB, 40 pages) ConocoPhillips (U.K.) Limited - 5 x fixed platforms Viking CD, DD, ED, GD, HD Removal to shore of topsides and jackets for recycling/disposal September 2016 Leadon (PDF, 1.71MB, 53 pages) Maersk Oil North Sea UK Limited - FPSO Removal for re-use at different location March 2016 Subsea Removal of 2 x bundle towheads and mid-line structure to shore for disposal; removal of 2 x drill centres to shore for disposal March 2016 Pipelines 2 x Pipeline bundles to be left in-situ, partial removal of gas import pipeline March 2016 Harding STL (PDF, 2.61MB, 73 pages) Harding STL Close-Out Report (PDF, 1.62MB, 26 pages) TAQA Bratani Limited - Harding Submerged Turret Loading (STL) System Harding Submerged Turret Loading (STL) System to be replaced by new Offshore Loading System. STL to be removed to shore for recycling/disposal and shuttle tanker mooring and loading buoy interfaces returned to owner 2015 Thames Area – Horne & Wren (PDF, 1.57MB, 48 pages) Tullow Oil SK Limited - 1x fixed platform Removal of topsides and jackets to shore for recycling/disposal November 2015 Pipelines To remain buried in situ November 2015 Thames Area – Orwell (PDF, 828KB, 42 pages) Tullow Oil SK Limited - Subsea Installations Removal to shore for recycling/disposal November 2015 Pipelines To remain buried in situ November 2015 Thames Area – Wissey (PDF, 1.26MB, 43 pages) Tullow Oil SK Limited - Subsea Installations Removal to shore for recycling/disposal November 2015 Pipelines To remain buried in situ November 2015 Thames Area – Thames Complex (PDF, 15.9MB, 76 pages) Perenco UK Limited - 3x fixed platforms Removal of topsides and jackets to shore for recycling/disposal October 2015 Subsea Installations Removal to shore for recycling/disposal October 2015 Pipelines To remain buried in situ October 2015 Thames Area – Gawain (PDF, 3.8MB, 47 pages) Perenco UK Limited - Subsea Installations Removal to shore for recycling/disposal October 2015 Pipelines To remain buried in situ October 2015 Thames Area – Arthur (PDF, 4.41MB, 46 pages) Perenco UK Limited - Subsea Installations Removal to shore for recycling/disposal October 2015 Pipelines To remain buried in situ October 2015 Brent - Brent Delta Topside (PDF, 3.55MB, 72 pages) Brent Delta Topside Interim Close Out Report (PDF, 3.39MB, 49 pages) Shell U.K. Limited - Brent Delta Topside Removal of topside to shore for recycling and disposal July 2015 Rose Decommissioning Programmes (PDF, 2.87MB, 42 pages) Rose Close Out Report (PDF, 3.31MB, 36 pages) Centrica Resources Limited - Subsea Installations Removal to shore for recycling/disposal May 2015 Close Out Report Approved October 2018 Pipelines Removal of sections of un-trenched pipelines; trenched pipelines decommissioned in situ May 2015 Close Out Report Approved October 2018 Stamford (PDF, 2.71MB, 39 pages) Stamford Close Out Report (PDF, 2.66MB, 36 pages) Centrica North Sea Gas Limited - Subsea Installations Removal to shore for recycling/disposal April 2015 Close Out Report approved February 2019 Pipelines Removal of sections of un-trenched pipelines; trenched pipelines decommissioned in situ April 2015 Close Out Report approved February 2019 Murchison (PDF, 2.37MB, 70 pages) CNR - Large Steel Platform Topsides and jacket to top of footings to be removed to shore for recycling/disposal. Footings to remain in situ August 2014 Pipelines Export pipeline decommissioned in situ with remedial rock placement.

Infield Flowlines to be removed for recycling/disposal.

August 2014 Rubie & Renee (PDF, 2.47MB, 50 pages) Endeavour Energy UK Limited - Subsea Installations Removal to shore for recycling/disposal April 2014 Pipelines Selective Recovery April 2014 Miller (PDF, 6.57MB, 198 pages) BP Exploration (Alpha) Limited   Large Steel Platform Footings to remain in place, steel topsides and jacket to top of footings to be removed to shore December 2013 Schiehallion & Loyal Phase One (PDF, 1.84MB, 60 pages) Schiehallion & Loyal Phase One Close Out Report (PDF, 1010KB, 22 pages) Britoil Limited - Schiehallion FPSO Removal for potential re-use 2013, Close Out Report Approved May 2019 Pipelines Recovery where possible. Production flowlines to be left in situ 2013, Close Out Report Approved May 2019 IVRR - decommissoning programme (PDF, 1.57MB, 102 pages) IVRR Close Out Report (PDF, 4.74MB, 35 pages) Hess limited - FPSO Removal for re-use at different location 2013 Subsea installations Removal to shore for recycling/disposal 2013 Pipelines Selective recovery 2013 Camelot (PDF, 488KB, 39 pages) Camelot Close out report (PDF, 2.27MB, 41 pages) Energy Resource Technology (UK) Limited - Small Steel Platform Removal to shore for recycling / disposal 2012 Pipelines Pipelines decommissioned in situ 2012 Fife, Flora, Fergus, Angus: decommissioning programme (PDF, 8.36MB, 135 pages) FFFA Close Out Report (PDF, 1.49MB, 33 pages) Hess Limited - FPSO Removed for re-use at different location 2012 Subsea installations Removal to shore for recycling / disposal 2012 Pipelines Full removal of un-trenched pipelines; trenched pipelines decommissioned in situ 2012 Don Britoil Public Limited Company - Subsea installation Removal to shore for recycling / disposal 2011 Pipelines Decommissioned in situ with selective recovery 2011 Welland Perenco UK Limited Perenco UK Limited Small Steel Platform Removal for re-use outside of UK waters 2010 Pipelines Decommissioned in situ with selective recovery 2010 Tristan NW Close out report Silverstone Energy Limited Bridge Energy UK Limited Subsea installation Removal to shore for recycling 2010; close-out report received January 2011 Pipelines Production pipeline with piggy-backed umbilical - leave in situ; jumpers, spool pieces and associated pipeline equipment - remove to shore for re-use or recycling 2010; close-out report received January 2011 Shelley Close out report Premier Oil - Sevan Voyageur FPSO Tow away for future use at another location 2010; close-out report received February 2012 Manifold and Wellhead Remove to shore for re-use, recycling or disposal 2010; close-out report received February 2012 Pipelines Production pipeline - leave in situ; umbilical - remove in sections 2010; close-out report received February 2012 Kittiwake SAL Export System Close out report Venture North Sea Oil Limited - Kittiwake SAL Assembly SAL Assembly - removal to shore for re-use. Revision to approved decommissioning programme: Completion of the removal of the SAL Assembly extended to 31 July 2012 2009; close-out report received July 2012 Pipelines Pipeline - flexible flowline removed to shore for re-use 2009; close-out report received July 2012 MCP-01 Close out report Total E& P UK Limited - Manifold & Compression Platform Permit granted for the disposal in-situ of the concrete substructure; topsides to be removed to shore for re-use, recycling or disposal 2008; close-out report received March 2013 Kittiwake Loading Buoy Venture North Sea Oil Limited - Exposed Location Single Buoy Mooring System (ELSBM) Removals to shore for recycling or disposal 2008 Linnhe (PDF, 2.25MB, 66 pages) </p> Linnhe Close Out Report (PDF, 1000KB, 22 pages) Mobil North Sea LLC - Wellhead Protection Structure Removal to shore. Revision to approved decommissioning programme: completion of the removal of the Wellhead Protection Structure extended to 30 June 2010 2008; year of revised approval: 2010 Pipelines Decommissioned in situ; pipeline sections outside trenches removed to shore. Revision to approved decommissioning programme: completion of the abandonment of the pipelines extended to 30 June 2010 2008; year of revised approval: 2010 Indefatigable (Shell) (PDF, 11.6MB, 224 pages) </p> Close Out Report (PDF, 2.47MB, 64 pages) Shell U.K. Limited - 6 x fixed steel platforms Removal to shore 2007 Pipelines 2 x hose bundles removal to shore; 5 x infield + export decommissioned in situ 2007 NW Hutton: decommissioning programme (PDF, 14.9MB, 320 pages)
Close Out Report (PDF, 2.52MB, 32 pages) Amoco (U.K.) Exploration Company - now a subsidiary of BP plc - Large Steel Platform Footings to remain in place, steel topsides and jacket to top of footings to be removed to shore 2006 Pipelines Decommissioned in situ 2006 Ardmore British American Offshore Limited - Mobile Jack-Up Rig Re-use 2005 Ardmore Ugland Nordic Shipping AS - Single Anchor Loading Systems Re-use/removal to shore 2005 Pipelines Re-use 2005 Ardmore Acorn Oil & Gas Limited - Subsea equipment including guide frame Removal to shore 2005 Brent Shell - Brent Flare Removals to shore for recycling and disposal 2004 Beatrice Talisman Energy (UK) Limited - Fixed Steel Platforms Re-use 2004 Forbes and Gordon Infield Pipelines BHP Billiton - Infield Pipelines Decommission in situ - retrench any area of pipeline with less than 0.4m depth of cover 2003; close-out report received May 2005 Frigg TP1, QP & CDP1 Close out report Total E&P Norge AS - Treatment Platform 1 (TP1), Quarters Platform (QP) and Concrete Drilling Platform 1 (CDP1) Concrete substructures to remain in place; concrete topsides to be removed to shore; steel installations to be removed to shore; infield pipelines to be removed to shore 2003 Durward and Dauntless Amerada Hess - Pipelines Decommissioned in situ 2002 Hutton Kerr-McGee - Tension Leg Platform Re-use 2002; close-out report received July 2004 Pipelines 1 x removal to shore; 1 x decommissioned in situ (with future monitoring programme) 2002; close-out report received July 2004 Camelot CB ExxonMobil - Fixed Steel Platform Re-use or removal to shore for recycling. Revision to approved decommissioning option: removal to shore for dismantling and recycling 2001. Year of revised approval: 2002 Blenheim and Bladon Talisman - FPSO Re-use 2000 Pipelines Removal to shore 2000 Durward and Dauntless Amerada Hess - FPSO Re-use 2000 Subsea Facilities Removal to shore 2000 Maureen and Moira Phillips - Large Steel Gravity Platform Removal to shore for re-use or recycling 2000 Concrete Loading Column Removal to shore for re-use or recycling 2000 Pipelines 2 x removal to shore;1 x decommissioned in situ 2000 Brent Spar Shell - Oil Storage and Loading Facility Re-use as part of quay extension. Revision to approved decommissioning option: Brent Spar Anchor Blocks - removal to shore for reuse, recycling or disposal 1998 Year of revised approval: 2004 Donan BP - FPSO Re-use 1998 Fulmar SALM Shell - Single Anchor Leg Mooring Buoy Removal to shore 1998 16” Pipeline Decommissioned in situ 1998 Emerald MSR - FPSO Re-use 1996 Pipeline Decommissioned in situ 1996 Frigg FP Elf Norge TotalFinaElf Norge Flare Column Removal to shore 1996 Leman BK Shell - Fixed Steel Platform Removal to shore 1996 Staffa Lasmo - Pipelines Removal to shore 1996 Viking AC, AD, AP & FD Conoco - 4 x Fixed Steel Platform Removal to shore 1996 Esmond CP & CW BHP - 2 x Fixed Steel Platform Removal to shore 1995 Gordon BW BHP - Fixed Steel Platform Removal to shore 1995 Angus Amerada Hess - Floating Production, Storage and Offloading (FPSO) Vessel Re-use 1993 Forbes AW Hamilton BHP Fixed Steel Platform Removal to shore 1993 Argyll, Duncan and Innes Hamilton BHP Floating Production, Facility (FPF) Removal to shore 1992 Catenary Anchor Leg Mooring (CALM) Buoy Removal to shore 1992 Pipelines Removal to shore 1992 Blair Sun Oil AGIP Pipelines 1 x Re-use; 1 x Decommissioned in situ 1992 Crawford Hamilton Oil BHP Floating Production, Facility (FPF) Removal to shore 1991 Catenary Anchor Leg Mooring (CALM) Buoy Removal to shore 1991 Subsea Facilities Removal to shore 1991 Piper Alpha Occidental Talisman Fixed Steel Platform Toppling 1988

During the course of a field’s life, pipelines/sections of pipelines may be taken out of use, e.g. due to corrosion, problems with reservoir pressure, damage to the pipeline, etc. When this happens, under the Petroleum Act 1998 the Secretary of State has the option of immediately calling for a full decommissioning programme. This is not always considered an appropriate option however, and so it has been agreed consideration will be given to handling suitable pipelines, under an informal decommissioning regime, thereby deferring a formal programme until the end of the field’s life.

If a formal decommissioning programme is not immediately deemed suitable, details of the out of use pipeline(s) will be circulated to other government departments for comment. Following this, OPRED will decide one of the following:

The Interim Pipeline Regime is intended to ensure out of use lines do not pose a risk to other users of the sea or the environment and that they are covered by an appropriate surveying and maintenance regime from the point when they are taken out of use until approval of the formal decommissioning programme, which is usually at the end of field life. It should be noted that any interim solution should not prejudice the final decommissioning options for that line, including complete removal. The department expects operators to submit details of out of use pipelines/sections of a pipeline as soon as they are taken out of use.

Operators are reminded that any works that are proposed on any pipelines under the Pipeline Works Authorisation regime, as per their Terms and Conditions of the PWA, must have a legal consent in place before works can commence which includes but is not exclusive to any proposed decommissioning works. Consents are issued by the Oil & Gas Authority and operators are requested to email consents@ogauthority.co.uk on any queries that they may have relating to legal consents. Further guidance can also be found on the Oil & Gas Authority website.

If you are an operator, aware of any out of use pipelines that have not been referred to the department, please submit a completed DPN form at your earliest convenience.

Following confirmation a pipeline has been accepted under the Interim Pipeline Regime, the Offshore Decommissioning Unit will continue to monitor the condition of the pipeline by asking the Operator to confirm the status of the pipeline remains unchanged following future surveys.

A list of all installations on the UKCS and their current status is available from the OSPAR Website

At the first ministerial meeting of the Commission for the Protection of the Marine Environment of the North East Atlantic (OSPAR) in 1998, a binding decision was agreed that set rules for the disposal of offshore installations at sea. Under the decision the dumping and leaving wholly or partly in place of offshore installations is prohibited. Decision 98/3 recognises it may be difficult to remove the ‘footings’ of large steel jackets weighing more than 10,000 and concrete installations. As a result there are derogations for these categories of installations if the internationally agreed assessment and consultation process shows leaving them in place is justifiable.

OPRED has utilised decommissioning programme templates for derogation and non-derogation projects. These templates include all required content as detailed in Annex C of the guidance notes. There are also templates available which are currently being trialled for more specific and small scale decommissioning activity including rig reactivation and removal of a single Wellhead Protection Structure. Operator’s should discuss all individual cases with OPRED who will advise of the appropriate template.

A word version of these templates can also be requested from OPRED. Please email odu@beis.gov.uk for further details.