Woodside Energy has awarded all major contracts involved in the decommissioning of subsea infrastructure at Enfield, Griffin, Stybarrow, and Echo/Yodel oil and gas fields on the North West Shelf offshore Western Australia.
Subject to regulatory approvals, Woodside expects to begin the decommissioning campaign in this year’s fourth quarter. It will follow decommissioning activities that began at Enfield and Balnaves field in first-quarter 2022.
The new campaign includes removal and disposal of the Nganhurra riser turret mooring (RTM) with associated umbilicals, flowlines, and other subsea equipment at Enfield as well as the Griffin RTM and the Stybarrow disconnectable turret mooring system.
Contractors engaged include TechnipFMC, Heerema, McDermott, Fugro, DOF, and McMahon. The contract to permanently plug wells at Stybarrow has been awarded to Transcocean.
Integrated engineering, preparation, removal, and transport of the Nganhurra RTM from Enfield was awarded to Heerema Marine Contractors in 2022.
The full decommissioning project will be the largest of its kind so far undertaken offshore Western Australia.