Goodwyn Area Infill Development Offshore Project Proposal

Overview

As Operator of the North West Shelf Joint Venture (NWSJV), Woodside Energy Limited (Woodside) proposes to undertake the Goodwyn Area Infill Development in Commonwealth waters, ~140 km north-west of Karratha, Western Australia. The purpose of the Goodwyn Area Infill Development is to partially fill the ullage (unused production capacity) at the existing Goodwyn A (GWA) platform. Incremental volumes of gas and condensate are proposed to be transported from up to 8 production wells to the GWA platform for export at the Karratha Gas Plant (KGP).

The proposed Goodwyn Area Infill Development comprises multiple subsea tiebacks to the existing Greater Western Flank (GWF) subsea infrastructure, which will transfer the reservoir fluids to the existing GWA platform. The development will target both existing and previously undeveloped gas reservoirs west and south-west of the GWA platform in Commonwealth waters. The Project Area involves drilling and subsea installation in Woodside petroleum titles, WA-5-L, WA-24-L, WA-23-L, WA-7-R, WA-6-L, WA-23-L, WA-56-L, WA-57-L, WA-58-L.  The Project Area, at its closest is ~30 km north of the Montebello Islands.

Reservoir fluids from the Goodwyn Area Infill Development will then be processed at the GWA platform before being exported (via the existing interfield line and export trunkline) to the KGP for final processing and subsequent export to domestic and international markets.

The Goodwyn Area Infill Development is a phased development, with construction (drilling of production wells and installation of subsea infrastructure) and start-up of operations occurring over multiple phases.

The proposed phased activities include:

• Drilling and completions: geotechnical sampling, drilling operations, formation evaluation, well completion, well unloading
• Subsea installation and pre-commissioning: installing Xmas trees, flowlines, electrohydraulic umbilicals, and other infield infrastructure and pre-commissioning
• Start-up and operations: initial start-up of wells and subsea infrastructure and subsea inspection, monitoring, maintenance and repair (IMMR)
• Field support activities including operating Mobile Operating Drilling Units (MODU), vessels, helicopters, and Remotely Operated Vehicles (ROV)
• Decommissioning: plugging and abandoning wells and removing infrastructure

This Offshore Project Proposal (OPP) does not include the existing operations of the GWA facility and North West Shelf Project. These facilities are operating under existing environmental approvals. These existing operations (and any approved changes) will continue to operate irrespective of the proposed Goodwyn Area Infill Development proceeding.

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