253993-00-REP-16-DecommissioningPlan- Kinsale ?· Kinsale Area Decommissioning Project Decommissioning…

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  • Kinsale Area Decommissioning Project

    Decommissioning Plan - Kinsale Head Petroleum Lease

    (OPL 1) - Consent Application No.1

    253993-00-REP-16 | 12 June 2018

  • BRAVO

    ALPHA

    A-Sand

    A-Sand

    B-Sand

    B-Sand

    Inch Terminal

    Kinsale HeadGas Field1978

    BallycottonGas Field1991

    Seven HeadsGas Field2003

    Note:This figure is for diagrammatic purposes only.

    SouthwestKinsaleGas Field2001

    GreensandGas Field2003

  • PSE Kinsale Energy Limited Kinsale Area Decommissioning ProjectDecommissioning Plan Kinsale Head Petroleum Lease (OPL 1)

    Consent Application No.1

    253993-00-REP-16 | Issue 1 | 12 June 2018 | Arup

    Contents Page

    Glossary of Terms i

    1 Introduction 4 1.1 Introduction 4 1.2 Project Background Kinsale Head 4 1.3 OPL-1 Petroleum Lease 8 1.4 Overview of Facilities 8 1.5 Overview of Statutory Background 10 1.6 Methodology 12 1.7 Overview of Decommissioning Plan 13 1.8 Objective of Decommissioning project 14

    2 Facilities Description 15 2.1 History of Operations 15 2.2 Inventory of Facilities 16

    3 Cessation of Production 28 3.1 Reasoning 28 3.2 Technical and Economic Evaluations 28 3.3 Other Uses Considered 30

    4 Decommissioning Options 31 4.1 Platform Topsides 31 4.2 Platform Wells 31 4.3 Subsea Wells 31 4.4 Subsea Structures 32

    5 Decommissioning Project Management 33 5.1 Project Management Approach 33 5.2 Organisation 34 5.3 Resources 34 5.4 Costs 35 5.5 Reporting 35

    6 Decommissioning Activities and Schedule 36 6.1 Pre-Cessation of Production Activities 36 6.2 Post CoP Activities / Pre-Decommissioning Activities 36 6.3 Decommissioning Activities 37 6.4 Decommissioning Schedule 42 6.5 Materials and Waste Management 45 6.6 Health and Safety 48

  • PSE Kinsale Energy Limited Kinsale Area Decommissioning ProjectDecommissioning Plan Kinsale Head Petroleum Lease (OPL 1)

    Consent Application No.1

    253993-00-REP-16 | Issue 1 | 12 June 2018 | Arup

    7 Post-Decommissioning Phase 50 7.1 Post Decommissioning Status 50 7.2 Post Decommissioning Survey 50 7.3 Decommissioning Close-out Report 50 7.4 Residual Liability 51 7.5 Post Decommissioning Monitoring 51

    8 Environmental Assessment 52 8.1 Environmental Baseline and Sensitivity 52 8.2 Environmental Assessment Methodology and Identification of Potentially

    Significant Effects 52 8.3 Management of Residual Effects and Conclusions 55 8.4 Conclusions of the Appropriate Assessment Screening 57

    9 Stakeholder Engagement 58 9.1 Introduction 58 9.2 Stakeholder Engagement Activities 58 9.3 Further Stakeholder Engagement 59

    Tables

    Table 1: Well Details ............................................................................................................. 5 Table 2: Lease details .......................................................................................................... 8 Table 3: Key National, European and International legislation relevant to the KADP ..........11 Table 4: Summary of proposed decommissioning options for the OPL-1 Facilities .............13 Table 5: Summary of Development History for the Kinsale Area Fields ..............................15 Table 6: Topsides to be decommissioned ...........................................................................25 Table 7: Subsea infrastructure to be decommissioned ........................................................25 Table 8: OPL-1 wells to be decommissioned .......................................................................26 Table 9: Platform well abandonment main steps .................................................................37 Table 10: Main stages of the topsides single lift using a specialist HLV ..............................38 Table 11: Subsea well abandonment main steps ................................................................41 Table 12: Materials Generated ............................................................................................45 Table 13: Summary of potential significant environmental effects .......................................53 Table 14: Summary of commitments and actions ................................................................55

    Figures

    Figure 1: Location of the Kinsale Area fields and facilities .................................................... 7 Figure 2: Kinsale Area Facilities ........................................................................................... 9 Figure 3: Overview of the Kinsale Head Facilities ...............................................................17 Figure 4: Kinsale Alpha........................................................................................................18 Figure 5: Kinsale Bravo .......................................................................................................19 Figure 6: Ballycotton Infrastructure ......................................................................................20

  • PSE Kinsale Energy Limited Kinsale Area Decommissioning ProjectDecommissioning Plan Kinsale Head Petroleum Lease (OPL 1)

    Consent Application No.1

    253993-00-REP-16 | Issue 1 | 12 June 2018 | Arup

    Figure 7: Southwest Kinsale and Greensand ......................................................................21 Figure 8: Subsea X-mas Tree ..............................................................................................22 Figure 9: Subsea infrastructure Wellhead Protection Structure and PLEM ......................23 Figure 10: Typical Well Abandonment Diagram ..................................................................24 Figure 11: Kinsale Area gas fields production rates .........................................................29 Figure 12: PETRONAS Project Management System for decommissioning projects ..........33 Figure 13: Project Team Execution Phase .......................................................................34 Figure 14: Conventional HLV, in this case Saipem 7000, lifting a topsides structure .........39 Figure 15: Kinsale Alpha topside schematic showing the topside module sections ............40 Figure 16: Typical semi-submersible drilling rig (MODU) .....................................................42 Figure 17: Indicative Project Schedule ................................................................................44

    Appendices

    Further Information

    Appendix A1: Relevant International Conventions and European Legislation

    Appendix A2: Well Completion Diagrams

    Appendix A3: Layout Drawings

    Appendix A

  • Kinsale Area Decommissioning Project

    Glossary of Terms

  • BRAVO

    ALPHA

    A-Sand

    A-Sand

    B-Sand

    B-Sand

    Inch Terminal

    Kinsale HeadGas Field1978

    BallycottonGas Field1991

    Seven HeadsGas Field2003

    Note:This figure is for diagrammatic purposes only.

    SouthwestKinsaleGas Field2001

    GreensandGas Field2003

  • PSE Kinsale Energy Limited Kinsale Area Decommissioning ProjectDecommissioning Plan Kinsale Head Petroleum Lease (OPL 1)

    Consent Application No.1

    253993-00-REP-16 | Issue 1 | 12 June 2018

    Page i

    Glossary of Terms Term Explanation

    AA Appropriate Assessment

    ALARP As Low As Reasonably Practicable

    AHV Anchor Handling Vessel

    Buoyancy tank An enclosed air-filled section of a boat or ship designed to keep it afloat and prevent it from sinking

    Bunkering Supply of fuel for use by ships in a seaport

    CA Comparative Assessment

    Cantilever Structural element anchored at only one end to a support from which it is protruding

    CCS Carbon Capture and Storage

    Concrete mattress

    A series of concrete blocks usually connected by polypropylene ropes resembling a rectangular mattress, used for the weighting and/or protection of seabed structures including pipelines

    CoP Cessation of Production: the stage at which, after all economic development opportunities have been pursued, hydrocarbon production ceases.

    CRU Commission for Regulation of Utilities

    CSV Construction Support Vessel

    DAA Dublin Airport Authority

    DCCAE Department of Communications, Climate Action and Environment

    DCENR Department of Communications, Energy and Natural Resources

    DECC Department of Energy & Climate Change (UK)

    Decommissioning Planned shut-down or removal of a building, equipment, plant, offshore installation etc., from operation or usage offshore.

    Diesel A low viscosity distillate fuel

    DSV Diving Support Vessel

    DTTAS Department of Transport, Tourism and Sport

    ER Environmental Report

    EIA Environmental Impact Assessment

    EPA Environmental Protection Agency

    FEAS Marine Institutes Fisheries Ecosystems Advisory Services

    Flowline Pipeline carrying unprocessed oil/gas within the oil or gas field area

    Freespan A free span on a pipeline is where the seabed sediments have been eroded, or scoured away leaving a void under the pipeline so that the pipeline is no longer supported on the seabed

    Grout Particularly fluid form of concrete used to fill gaps, generally a mixture of water, cement, and sand

    HES Health, Environment and Safety

    HFCs Hydrofluorocarbons

    HWM High Water Mark

  • PSE Kinsale Energy Limited Kinsale Area Decommissioning ProjectDecommissioning Plan Kinsale Head Petroleum Lease (OPL 1)

    Consent Application No.1

    253993-00-REP-16 | Issue 1 | 12 June 2018

    Page ii

    Term Explanation

    HLV Heavy-Lift Vessel

    IALA International Association of Marine Aids to Navigation and Lighthouse Authorities

    IMO International Maritime Organisation