Proposed Browse to NWS Development, EPBC Act and EP Act Environmental Referrals Supporting Document November 2018 Rev 0A BD0000RG0000037 Page 1 of 141 November 2018 TABLE OF CONTENTS 1. INTRODUCTION ................................................................................................. 6 1.1 Overview of Proposed Action .......................................................................................... 6 1.2 Project History ................................................................................................................. 6 1.2.1 Initial Concept Select ................................................................................................... 6 1.2.2 James Price Point Concept ......................................................................................... 7 1.2.3 FLNG Concept ............................................................................................................ 7 1.2.4 Browse to North West Shelf Concept .......................................................................... 7 1.3 Comparison with Browse FLNG Concept ....................................................................... 7 1.4 Purpose and Scope of this Document ............................................................................ 8 1.4.1 Purpose ....................................................................................................................... 8 1.4.2 Scope .......................................................................................................................... 9 1.5 Legislative Framework .................................................................................................. 10 1.5.1 Applicable Commonwealth Legislation and Policies ................................................. 10 1.5.2 Applicable State Legislation ...................................................................................... 11 2. DETAILED DESCRIPTION OF PROPOSED ACTION ..................................... 12 2.1 Development Overview ................................................................................................. 12 2.1.1 Project Area ............................................................................................................... 12 2.1.2 Key Characteristics - Overall Development ............................................................... 14 2.1.3 Development within State Waters ............................................................................. 16 2.2 Development Schedule ................................................................................................. 21 2.3 Infrastructure ................................................................................................................. 21 2.3.1 Wells .......................................................................................................................... 21 2.3.2 Subsea Infrastructure and Flexible Risers ................................................................ 21 2.3.3 FPSO Facilities .......................................................................................................... 22 2.3.4 BTL and Inter-Field Spur Line ................................................................................... 22 2.3.5 NWS Second Trunkline ............................................................................................. 22 2.4 Development Activities .................................................................................................. 23 2.4.1 Development Drilling ................................................................................................. 23 2.4.1.1 Drilling Method ....................................................................................................... 23 2.4.1.2 Drilling Fluids ......................................................................................................... 23 2.4.1.3 Drilling and Completions Unplanned Contingent Activities .................................... 24 2.4.2 Subsea Umbilicals, Risers and Flowlines (SURF)..................................................... 24 2.4.2.1 Site Preparation ..................................................................................................... 24 2.4.2.2 Installation of Subsea Infrastructure ...................................................................... 24 2.4.2.3 Installation of Flexible Risers ................................................................................. 25 2.4.3 Installation of FPSO Facilities ................................................................................... 25 2.4.4 Installation of BTL and Inter-Field Spur Line ............................................................. 25 2.4.5 Commissioning .......................................................................................................... 25 2.5 Operations .................................................................................................................... 26 2.5.1 Hydrocarbon Extraction ............................................................................................. 26 2.5.2 Processing ................................................................................................................. 26 BD0000RG0000037 Page 2 of 141 November 2018 2.5.3 Condensate offload ................................................................................................... 26 2.5.4 Gas Export ................................................................................................................ 26 2.6 Decommissioning .......................................................................................................... 26 2.7 Support Activities and Infrastructure ............................................................................. 27 2.7.1 Support Vessels and Helicopters .............................................................................. 27 2.7.2 Communications ........................................................................................................ 27 2.7.3 Supply Chain and Logistics Support ......................................................................... 27 2.8 Anticipated Discharges and Emissions ......................................................................... 27 2.8.1 Overview ................................................................................................................... 27 2.8.2 Atmospheric and Greenhouse Emissions ................................................................. 29 2.8.3 Liquid Discharges ...................................................................................................... 30 2.8.3.1 Hydrotest Fluid ....................................................................................................... 30 2.8.3.2 Produced Water ..................................................................................................... 30 2.8.3.3 Cooling Water ........................................................................................................ 31 2.8.3.4 Subsea Control Fluids ........................................................................................... 32 2.8.3.5 Desalination Brine .................................................................................................. 32 2.8.3.6 Drain Discharges ................................................................................................... 32 2.8.3.7 Sewage and Sullage .............................................................................................. 32 2.8.4 Drill Cuttings and Fluids ............................................................................................ 33 2.8.5 Solid Waste ............................................................................................................... 34 2.8.5.1 Non Hazardous Solid Waste .................................................................................. 34 2.8.5.2 Putrescible ............................................................................................................. 34 2.8.5.3 Hazardous Waste .................................................................................................. 34 2.8.6 Other Emission Sources ............................................................................................ 34 2.8.6.1 Ballast Water and Biofouling .................................................................................. 34 2.8.6.2 Noise Emissions .................................................................................................... 35 2.8.6.3 Artificial Light Emissions ........................................................................................ 37 3. STAKEHOLDER CONSULTATION .................................................................. 38 4. STUDIES AND INFORMATION SOURCES ..................................................... 39 4.1 Overview ....................................................................................................................... 39 4.2 Completed Studies ........................................................................................................ 39 4.3 Current and Planned Studies ........................................................................................ 39 5. EXISTING ENVIRONMENT .............................................................................. 41 5.1 Introduction ................................................................................................................... 41 5.2 Regional Characteristics ..............................................................................................