Woodside offshore decommissioning contracts of subsea infrastructure

Woodside Energy has completed award of all major contracts for the decommissioning of subsea infrastructure at the Enfield, Griffin, Stybarrow and Echo Yodel oil and gas fields offshore Western Australia. Finalisation of these contracts supports commencement, subject to regulatory approvals, of the decommissioning campaign in the fourth quarter of 2023. The upcoming work will follow successful decommissioning activities which have been underway at the Enfield and Balnaves fields since the first quarter of 2022. The campaign will include the decommissioning of the Nganhurra Riser Turret Mooring (RTM) on the Enfield field, the Griffin RTM and the Stybarrow Disconnectable Turret Mooring.
Woodside Energy Vice President Projects Australia Michal Abdullah said: “We are partnering with a range of providers with specialist capabilities and experience to ensure safe and successful execution of one of the largest decommissioning campaigns undertaken offshore Western Australia.
“We are progressing well with our planning and remain on track to meet the regulatory requirements to complete the campaign.
“Woodside is continuing to undertake extensive stakeholder consultation to inform the development of environment plans for the campaign. These plans are either being updated to reflect stakeholder feedback or have been lodged with the regulator, NOPSEMA, for assessment.”
The contracts have been awarded to a range of experienced and highly specialised service providers. They cover the removal and disposal of riser and disconnectable turret moorings, umbilicals, flowlines and other subsea infrastructure.
Specialist contractors engaged to undertake activities during the subsea decommissioning campaign include TechnipFMC, Heerema, McDermott, Fugro, DOF and McMahon. A contract for the permanent plug and abandonment of wells in the Stybarrow field has also been awarded to Transocean.

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