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Decommissioning Programmes

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   1   Decommissioning Programmes DRAFT FOR CONSULTATION LOGGS Satellites Vulcan UR, Viscount VO, Vampire OD & Associated Infield Pipelines   2 Document Control Approvals   Name Signature Date Prepared by Cathy Marston Reviewed by Michael Burnett Approved by Richard Tocher Approved by Kate Simpson Approved by Joe Farrell Approved by Barry King Revision Control Rev Reference Changes / Comments Issue Date 1 COP-SNS-L-UR-X-PM-12-00001 Pre Draft for BEIS 19-12-2014 2 COP-SNS-L-XX-X-PM-12-00001 Updated Pre Draft for BEIS 10-03-2015 3 COP-SNS-L-XX-X-PM-12-00001 Updated Pre Draft for BEIS 01-11-2016 4 COP-SNS-L-XX-X-PM-12-00001 Updated Pre Draft for Partner Approval 25-07-2017 5 COP-SNS-L-XX-X-PM-12-00001 Draft for Consultation 06-09-2017 Distribution List Name Company No of Copies Richard Tocher ConocoPhillips 1 Sandra Turin BP 1   3 Contents INST = Installations; P/L = Pipelines INST P/L C ONTENTS  3   A.   T ABLE OF T ERMS AND A BBREVIATIONS  4   B.   T ABLE OF F IGURES AND T ABLES  5   C.   T ABLE OF A PPENDICES  6   1.   E XECUTIVE S UMMARY  7  C OMBINED D ECOMMISSIONING P ROGRAMMES  7 R EQUIREMENT FOR D ECOMMISSIONING P ROGRAMMES  7 I NTRODUCTION  7 O VERVIEW OF I NSTALLATIONS AND P IPELINES B EING D ECOMMISSIONED  9 1.4.1. I NSTALLATIONS  9 1.4.2. P IPELINES  11 S UMMARY OF P ROPOSED D ECOMMISSIONING P ROGRAMMES  12 F IELD L OCATION INCLUDING F IELD L AYOUT AND A DJACENT F ACILITIES  14 I NDUSTRIAL I MPLICATIONS  18 2.   D ESCRIPTION OF I TEMS TO BE D ECOMMISSIONED  19  S URFACE F ACILITIES (T OPSIDES AND J ACKETS ) 19 S UBSEA I NSTALLATIONS AND S TABILISATION F EATURES  21 P IPELINES I NCLUDING S TABILISATION F EATURES  22 W ELLS  28 D RILL C UTTINGS  29 I NVENTORY E STIMATES  29 3.   R EMOVAL AND D ISPOSAL M ETHODS  31  T OPSIDES  31 3.1.1. T OPSIDES D ESCRIPTIONS  31 3.1.2 R EMOVAL M ETHODS  35 J ACKETS  36 3.2.1. J ACKET D ECOMMISSIONING O VERVIEW  36 3.2.2. J ACKET R EMOVAL M ETHODS  38 S UBSEA INSTALLATIONS AND STABILISATION FEATURES  39 P IPELINES  40 3.4.1. D ECOMMISSIONING O PTIONS  40 3.4.2. C OMPARATIVE A SSESSMENT M ETHOD  41 P IPELINE S TABILISATION F EATURES  43 W ELLS  45 D RILL C UTTINGS  45 3.7.1. D RILL C UTTINGS D ECOMMISSIONING O PTIONS  45 W ASTE S TREAMS  46 4.   E NVIRONMENTAL I MPACT A SSESSMENT  48  E NVIRONMENTAL S ENSITIVITIES (S UMMARY ) 48 P OTENTIAL E NVIRONMENTAL I MPACTS AND THEIR M ANAGEMENT  50 4.2.1. E NVIRONMENTAL I MPACT A SSESSMENT S UMMARY  50 5.   I NTERESTED P ARTY C ONSULTATIONS : 54   6.   P ROGRAMME M ANAGEMENT  54  P ROJECT M ANAGEMENT AND V ERIFICATION  54 P OST -D ECOMMISSIONING D EBRIS C LEARANCE AND V ERIFICATION  54 S CHEDULE  55 C OSTS  55 C LOSE O UT  55 P OST  –   D ECOMMISSIONING M ONITORING AND E VALUATION  56 7.   S UPPORTING D OCUMENTS  56   8.   P ARTNER L ETTERS OF S UPPORT  57     4 A.   Table of Terms and Abbreviations Abbreviation Explanation Bscf Billions of standard cubic feet CA Comparative Assessment CoP Cessation of Production BEIS Department for Business, Energy and Industrial Strategy EIA Environmental Impact Assessment EMS Environmental Management System ES Environmental Statement HLV Heavy Lift Vessel KP Kilometre Point KPI Key Performance Indicator LAT Lowest Astronomical Tide LOGGS Lincolnshire Offshore Gas Gathering System MeOH Methanol NORM Naturally Occurring Radioactive Material NUI Normally Unattended Installation OD LOGGS Satellite Vampire OD OGA Oil and Gas Authority OGUK Oil and Gas United Kingdom P&A Plug and Abandon PMT Project Management Team PWA Pipeline Works Authorisation SCI Site of Community Importance SLV Shear Leg Vessel SNS Southern North Sea Te Tonne TGT Theddlethorpe Gas Terminal Tscf Trillion standard cubic foot UKCS United Kingdom Continental Shelf UR LOGGS Satellite Vulcan UR VO LOGGS Satellite Viscount VO
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