Frigg Field Cessation Plan DP2 TCP2 DP1 TP1 QP Frigg Field CDP 1 TOTAL E&P TOTAL NORGE AS, PO Box 168, Norway 4001 Stavanger, Frigg Field Cessation Plan NORWAY Stavanger, 9 May Stavanger, 2003 UK Annexes EIA Disposal Plan Introduction Executive Summary Contents Preface PART 2 PART 1 Frigg Field Cessation Plan Foreword 9 May 2003 Foreword In accordance with the Norwegian Act of 29 November 1996 No. 72 relating to petroleum activities, this document is submitted by TOTAL E&P NORGE AS, on behalf of the Frigg Field Licensees, to the Norwegian Ministry of Petroleum and Energy and the Norwegian Ministry of Local Government and Labour as the Cessation Plan (Avslutningsplan) in respect to the following installations and associated infield subsea pipelines and cables:- • 25/1 - Frigg - TCP2 • 25/1 - Frigg - DP2 • 25/1 - Frigg - DP1 Wreck Additionally, in accordance with the requirements of Part IV, Section 29 of the United Kingdom Petroleum Act 1998, this document is submitted by TOTAL E&P NORGE AS on behalf of the Frigg Field Licensees to the United Kingdom Department of Trade and Industry as the Cessation Plan (Decommissioning Programme) in respect to the following installations and associated infield subsea pipelines:- • 10/1 - FRIGG - TP1 • 10/1 - FRIGG - QP • 10/1 - FRIGG - CDP1 Although not required for compliance with the provisions of the UK Petroleum Act 1998, details of the planned decommissioning of the subsea cables associated with these platforms are also included within this Decommissioning Programme. This document, referred to hereafter as the Frigg Field Cessation Plan, is issued in both English and Norwegian. Page 5 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 This page intentionally left blank Page 6 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 Approval of Frigg Field Licensees The Frigg Field Licensees are:- • TOTAL E&P NORGE AS (Operator) • Norsk Hydro Produksjon a.s • Statoil ASA • Elf Exploration UK PLC • TOTAL E&P UK PLC The Frigg Field Licensees each confirm that they authorise TOTAL E&P NORGE AS, as operator of the Frigg Field, to submit an abandonment programme relating to the Frigg Field, as directed by the UK Secretary of State. They also each confirm that they support the proposals detailed in the Decommissioning Programme, dated 9 May 2003, (which in the case of the Frigg Field is known as the Frigg Field Cessation Plan) submitted by TOTAL E&P NORGE AS. Letters from the Frigg Licensees confirming these matters are attached herewith. Page 7 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 This page intentionally left blank Page 8 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 Page 9 Page/ 450 9 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 This page intentionally left blank Page 10 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 Page 11 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 This page intentionally left blank Page 12 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 PagePage 13 / 45013 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 This page intentionally left blank Page 14 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 Page 15 / 450 Page 15 / 450 Frigg Field Cessation Plan Foreword 9 May 2003 This page intentionally left blank Page 16 / 450 Preface Annexes Environmental Impact Assessment Annexes (EIA) Disposal Contents Plan Part 2 Introduction Part 1 Executive Summary Contents Preface General Executive Summary Frigg Field Cessation Plan Introduction PART 1 PART Disposal Plan EIA PART 2 PART Annexes Frigg Field Cessation Plan Preface 9 May 2003 Preface The Frigg Field has a long and successful record. Since the start of production in 1977, Frigg has gained a reputation as a safe and reliable producer of large quantities of gas for the UK. This has benefited Norway, the UK, the Licensees and the work force involved. The Frigg Field straddles the boundary between the Norwegian and UK continental shelves, with facilities located in both the Norwegian and UK marine sectors. The recommended disposal arrangements for the Frigg Field Norwegian facilities will therefore be subject to approval by the Norwegian government, whilst the Frigg Field UK facilities will be subject to approval by the UK government. During the decommissioning phase however, the field will, as far as possible, be treated as one unit. Planning for decommissioning is a lengthy and far-reaching process and thus, in 1998, we started to plan for the orderly decommissioning of the Frigg Field facilities. The level of care and attention to detail used in developing a new field will also be applied to these decommissioning activities. Our objective during decommissioning, as during operations, is to undertake the necessary work in a timely and effective manner whilst respecting the environment, protecting the health and safety of personnel, and ensuring a satisfactory working environment. TOTAL E&P NORGE AS is experienced both in decommissioning installations at the end of their operational life and when possible, in finding new uses for them. The subsea facilities at North East Frigg were successfully removed in 1996/7 and reused onshore. The East Frigg and Lille-Frigg subsea production facilities were removed in 2001 and the Frøy Wellhead Platform in 2002. The Frigg Field however represents a more complex challenge, not least because of the magnitude of the operation and the complex issues raised by the presence of the three concrete substructures. We have committed ourselves to working from a base-case of total removal of all the facilities, provided it is feasible, taking into account all factors – health and safety, environment, technical feasibility, cost and public acceptance. Reuse and recycling of all, or parts, of the facilities is a key objective in the plans we are presenting. We will pay due respect to the legislation in force in Norway and in the UK, as well as conventions such as OSPAR and the International Maritime Organisation guidelines. We are committed to an open, honest and long-term dialogue with our stakeholders and we have listened and learned from the helpful comments we have received. We would like to thank all the parties involved during the preparation phase for their valuable contributions, which have been extremely beneficial in allowing us to make a better evaluation of the various disposal alternatives. This Cessation Plan contains a thorough assessment of our recommended disposal arrangements for all the Frigg Field facilities. The plans for the Norwegian and UK facilities are being presented at the same time to the Norwegian and UK governments for approval. Supported by the entire license group we, as Operator of the Frigg Field, are dedicated to continue the success story of Frigg throughout the Decommissioning Phase. Pierre Offant Managing Director, TOTAL E&P NORGE AS 9 May 2003 Page 19 / 450 Frigg Field Cessation Plan Preface 9 May 2003 This page intentionally left blank Page 20 / 450 Preface Annexes Environmental Impact Assessment (EIA) Annexes Disposal Plan Part 2 Contents Introduction Part 1 Executive Summary Contents Preface General Executive Summary Frigg Field Cessation Plan Introduction PART 1 PART Disposal Plan EIA PART 2 PART Annexes Frigg Field Cessation Plan Contents 9 May 2003 Frigg Field Cessation Plan – Contents FOREWORD 5 PREFACE 19 FRIGG FIELD CESSATION PLAN – CONTENTS 23 EXECUTIVE SUMMARY 33 1. General 33 2. Description of the Facilities to be Decommissioned 34 3. Overall Approach to Decommissioning 35 4. Evaluation Principles 36 5. Possible Continued Use of the Frigg Facilities 37 6. Assessment of Disposal Alternatives 37 7. Norwegian Registered Facilities 39 7.1 Drilling Platform DP2 39 7.2 Drilling Platform DP1 Wreck 39 7.3 Treatment and Compression Platform TCP2 40 7.4 Pipelines and Cables 42 7.5 DP2 Drill Cuttings 43 7.6 Debris Clearance 44 7.7 Costs 44 8. UK Registered Facilities 45 8.1 Living Quarters Platform QP 45 8.2 Concrete Drilling Platform CDP1 46 8.3 Treatment Platform TP1 49 8.4 Pipelines and Cables 51 8.5 CDP1 Drill Cuttings 52 8.6 Debris Clearance 52 8.7 Costs 52 9. Common Aspects 54 9.1 Field-Wide Comparison of Recommended and Rejected Disposal Arrangements 54 9.2 Long Term Durability of Concrete Substructures 57 9.3 Schedule 58 9.4 Project Management 59 9.5 Pre and Post Decommissioning Surveys 59 9.6 Maintenance 60 9.7 On-going Liability 60 9.8 Public Consultation 60 9.9 OSPAR Consultation 62 INTRODUCTION 65 DISPOSAL PLAN CONTENTS 73 1. INTRODUCTION TO THE DISPOSAL PLAN 77 Page 23 / 450 Frigg Field Cessation Plan Contents 9 May 2003 2. BACKGROUND INFORMATION 79 2.1 Discovery and Development 79 2.2 Satellites Fields and Tie-ins 80 2.3 Operations 81 2.4 Prevailing Meteorological and Oceanographic Conditions 81 3. FRIGG FIELD RESERVOIR 83 3.1 Introduction 83 3.2 Field Development 83 3.3 Optimisation of Production 84 3.4 Overall Recovery Performance 84 3.5 Future Production Strategy 85 4. FACILITIES TO BE DECOMMISSIONED 87 4.1 Frigg Field Platforms 87 4.1.1 Norwegian Registered Installations 88 4.1.2 UK Registered Installations 94 4.2 Frigg Field Infield Pipelines and Cables 100 4.2.1 Pipelines and Cables in the Norwegian Sector 101 4.2.2 Pipelines and Cables in the UK Sector 102 4.3 Frigg Field Drill Cuttings 104 4.3.1 Drill Cuttings in the Norwegian Sector 104 4.3.2 Drill Cuttings in the UK Sector 105 5. INVENTORY OF MATERIALS 107 5.1 Platforms 107 5.2 Infield Pipelines and Cables 108 5.2.1 Infield Pipelines and Cables in Norwegian Sector 108 5.2.2 Infield Pipelines and Cables in UK Sector 108 5.3 Drill Cuttings 109 5.3.1 Drill Cuttings in Norwegian Sector - DP2 109 5.3.2 Drill Cuttings in the UK Sector - CDP1 110 6.