Woodside Energy has proposed to abandon the Stybarrow development wells within the offshore permit area WA-32 L.
The activities include the plug and abandonment (P&A) of 10 subsea wells including production, gas injection and water injection wells, and removal of all well infrastructure above the mudline.
The activities are set to be conducted offshore Exmouth, Western Australia with an operational area defined by a 3000-metre radius around each of the drill centres.
This allows for the installation of a temporary mooring system for a semi-submersible mobile offshore drilling unit (MODU).
Depending on the availability of a suitable MODU, the earliest P&A activities could commence in Q3 of 2023.
The permanent plugging of the Stybarrow wells is required to completed no later than 30 September 2024, the National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) advised.
Removal of well infrastructure above the mudline may commence early in 2024, and is required to be recovered no later than 31 March 2025.
Earlier in 2023, Woodside Energy awarded all major contracts for the decommissioning of subsea infrastructure at the Enfield, Griffin, Stybarrow and Echo Yodel offshore Western Australian oil and gas fields.
In July, McDermott was awarded a contract for offshore decommissioning work by the company.