Woodside Energy Group has awarded subsea infrastructure decommissioning contracts for the Enfield, Griffin, Stybarrow and Echo Yodel oil and gas fields offshore Western Australia (WA).

The contracts have been awarded to companies such as DOF, Fugro, Heerema, McDermott, McMahon and TechnipFMC to carry out activities during the subsea decommissioning campaign.

The subsea decommissioning campaign will cover the decommissioning of the Nganhurra riser turret mooring (RTM) on the Enfield field, the Griffin RTM and the Stybarrow disconnectable turret mooring.

Under the contracts, the companies will be responsible for activities including the removal and disposal of riser and disconnectable turret moorings, flowlines and umbilicals as well as other subsea infrastructure.

Woodside Energy Projects Australia vice-president 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.”

Woodside also selected Transocean for the permanent plug and abandonment of wells in the Stybarrow oil field.

Subject to the receipt of regulatory approvals, the decommissioning campaign is scheduled to start in Q4 2023.