DECOMMISSIONING OF OFFSHORE PLATFORMS IN THE DANISH NORTH SEA REGION. Decommissioning Yard, Esbjerg. Site visit photo RAVI SHANKAR

Transcription

1 DECOMMISSIONING OF OFFSHORE PLATFORMS IN THE DANISH NORTH SEA REGION Decommissioning Yard, Esbjerg Site visit photo RAVI SHANKAR

2 Decommissioning of offshore platforms Esbjerg, Denmark Anders Schmidth Kristensen Allan Christensen Gitte Moestrup Mogens Møller Hansen

3 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

4 Given Task To design an onshore yard at Esbjerg harbour location for recycling of abandoned oil and gas offshore platforms at North sea The project shall minimum focus on the following: 1 Platform decommissioning activities in North sea oil and gas sector 2 Study, design and discuss about the possibilities to transport the abandoned offshore platforms to shore for recycling 1 Onshore scrap yard design for decommissioned structures 2 Handling of oil and gas structures at decommissioning yard 3 Environmental concern Given Data 1 Decommissioning of offshore platforms located at Danish North sea waters 2 Regional convention: OSPAR 98/3 3 Esbjerg demolition yard plan 4 Handouts of conferences held by Offshore Center Denmark on Decommissioning of offshore structures in Esbjerg, Denmark 5 Company contact sources Offshore Center Denmark, Rambøll and Uniscrap

5 Decommissioning yard, Esbjerg

6 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

7 Platform Decommissioning Initial Phase Track 1 Technical, Managerial issues 1 What to be done at offshore? 2 How to transport? 3 What to be done at onshore? Track 2 Financial, Managerial issues 1 Pre-planning, Post-planning 2 Supply chain, Stock 3 Forecast, Revisions Final Phase Engineering and construction Site clearance and Restoration OSPAR 1998/3 DEPA IMO Management Permitting and Regulatory framework What to be done at Offshore? 1 Management Options BPEO BPSO BPFO BPPO How to Transport? 2 Resource Options Documents Client/ Contractors Funds MMM What to be done at Onshore? 3 Conventions and Standards Planning Supply Forecasts

8 Platform Decommissioning Initial Phase Track 1 Technical, Managerial issues 1 What to be done at offshore? 2 How to transport? 3 What to be done at onshore? Track 2 Financial, Managerial issues 1 Pre-planning, Post-planning 2 Supply chain, Stock 3 Forecast, Revisions Final Phase Engineering and construction Site clearance and Restoration OSPAR 1998/3 DEPA IMO Management Permitting and Regulatory framework What to be done at Offshore? 1 Management Options BPEO BPSO BPFO BPPO How to Transport? 2 Resource Options Documents Client/ Contractors Funds MMM What to be done at Onshore? 3 Conventions and Standards Planning Supply Forecasts

9 Platform Decommissioning Initial Phase Track 1 Technical, Managerial issues 1 What to be done at offshore? 2 How to transport? 3 What to be done at onshore? Track 2 Financial, Managerial issues 1 Pre-planning, Post-planning 2 Supply chain, Stock 3 Forecast, Revisions Final Phase Engineering and construction Site clearance and Restoration OSPAR 1998/3 DEPA IMO Management Permitting and Regulatory framework What to be done at Offshore? 1 Management Options BPEO BPSO BPFO BPPO How to Transport? 2 Resource Options Documents Client/ Contractors Funds MMM What to be done at Onshore? 3 Conventions and Standards Planning Supply Forecasts

10 Decommissioning Stages, Start End START Develop Decommissioning Options Reject/ Wait No Ready for offshore operations BPEO BPSO BPMO BPEO BPSO Proceed to Decommissioning Options Collect information Put to database Process Approve Deliver Yes Remove structures Govt Approval Yes Standards Specification Documents Transport ashore No Reject/ Wait Ready with setup at shore yard Yes Dismantle, Re-use or burry onland No Reject/ Wait STOP

11 Decommissioning Stages, Start End START Develop Decommissioning Options Reject/ Wait No Ready for offshore operations BPEO BPSO BPMO BPEO BPSO Proceed to Decommissioning Options Collect information Put to database Process Approve Deliver Yes Remove structures Govt Approval Yes Standards Specification Documents Transport ashore No Reject/ Wait Ready with setup at shore yard Yes Dismantle, Re-use or burry onland No Reject/ Wait STOP

12 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

13 Danish platforms

14 Platform decommissioning methodology Topsides / Crown to rest Tower / Trunk to support Footings / Roots to stand

15 Platform description Sign Name of Module Conventional platform Tripod type platform M1 Wellhead module Yes Yes M2 Process module Yes Yes M3 Utility module Yes Yes M4 Power generation Yes Yes M5 Drilling module Yes No M6 Control room Yes No M7 Accommodation Yes No M8 Helideck Yes Yes M9 Flare boom Yes Yes M10 Drilling derrick Yes No M11 Cellar decks Yes No

16 Platform materials Modules Example Jacket structure Process facility module Drilling module Utility module Power generation module Control room Accommodation module Helideck Flare boom Others Zn, Al anodes, steel, concrete Crude oil, methanol, Ba, St Drilling fluids, bentonite Steel, oil products, H2S and O2 scavengers Transformer oil, lubricating oil PCBs, electrical wiring cu, plastics Refrigerator, textiles, furniture, floor Jet fuel Dead weight, steel Protection walls, storage chemicals

17 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

18 Esbjerg decommissioning yard, Denmark Site visit photo:

19 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

20 Transport options -OCD 1 2

21 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

22 Scrapping process - Uniscrap SCRAP WASTE FRAGMENTATION Ferrous Non Ferrous Non metals Ex: Fe, others Ex: Cu, Br, Al, Zn, Mg etc Ex: Plastic, PVC, Rexin etc Ex: WEEE, PCBs, etc RECOVERY OPERATION

23 Scrap materials - Dansk Genbrug Steel, DKK/Kg Rust free steel Rust free Stainless steel Electric motor El cable - 36 to 38% Cu El cable - 50 to 60% Al Aluminium, DKK/Kg 10 7 Aluminium blanks Aluminium roller, cylinder 9 12 Aluminium alloys Aluminium chips, flakes Offset Brass, DKK/Kg New Brass cuts Old Brass polished Old Red Brass, high Cu% Old Cu/Br Cooler Other Brass Copper, Zinc and Brass, DKK/Kg Copper el Wire, balnks Copper 95% Copper electrode Old Zinc Old Lead Truck batteries

24 Contents Introduction Management Platform description Decommissioning yard description Transport Scrapping Recommendations

25 Standards and documents Standards Conventions Collect information Put to database Process Approve Deliver ISO OSPAR Standards Specification Documents DNV BASEL API LONDON DS HELSINKI??? SOLAS Organizations Acts DEPA SSA DMA MEA IMO DWEA ILO

26 Decommissioning options Lift >= 2500 Tones Jack up rig or Derrick barge or HLV Hiring during idle conditions Transport Floating Barge Danish North sea region Hiring during idle conditions Re-use Standards and inspection Initial approved officials - Ex DNV, API Recycling What Standards and procedures? Contrast to Ship and Car recycling experience Vendors Ex Uniscrap A/s

27 Decommissioning options Demolition Open air dismantling Ex H J Hansen A/s Burry onshore Ex Kommunikemi A/s Greenpeace Avoid manual Recycling Switch to Green Recycling