Nganhurra Operations Cessation
|Activity type||Any other petroleum-related activity|
|Submitted by||Woodside Energy Ltd|
|Submission date||04 August, 2017|
|Decision date||20 December, 2017|
|Link to previously accepted EP|
Woodside is preparing an Environment Plan (EP) to undertake petroleum activities in the vicinity of Enfield oil field to support cessation of production activities.
The Enfield oil field is located in production licence WA-28-L in Commonwealth waters, approximately 52 km north-west of Exmouth in Western Australia.
Woodside is planning to flush the subsea and topside infrastructure prior to disconnecting the Nganhurra floating production storage and offloading (FPSO) facility from the field, remove the Riser Turret Mooring (RTM) from field and isolate and preserve subsea infrastructure in preparation for future decommissioning activities.
Activities anticipated to be undertaken as part of the EP include:
- Disconnection and sail away of the FPSO;
- preservation of the Nganhurra subsea systems until the wells are plugged and abandoned and subsea infrastructure is decommissioned; and
- removal of the RTM from field following disconnection of risers, electro-hydraulic umbilical (EHU), removal of buoyancy modules and disconnection of mooring lines from RTM.
The RTM may remain in-situ for a period of time post the FPSO disconnection.
Subject to mobile offshore drilling unit (MODU) contracting opportunities, well intervention and/or abandonment for selected wells may be undertaken as part of the EP scope.
Plugging and abandonment of remaining wells and the decommissioning of remaining subsea equipment will be subject to future stakeholder engagement and environment plan submissions.
|Commonwealth waters adjacent to||Western Australia|
|Titles (or other instruments)||