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Nganhurra Operations Cessation

Activity type Any other petroleum-related activity
Activity subtypes
Lifecycle Classification Decommissioning
Submitted by Woodside Energy Ltd
Submission date 04 August, 2017
Subtype New
Decision date 20 December, 2017
RMS ID 4142
Status Finalised
Outcome Accepted
Link to previously accepted EP

Project Manager
Corporate Affairs Adviser
11 Mount Street
+61 8 9348 4000

Location map (click to enlarge)
Location map - Activity: Nganhurra Operations Cessation (refer to description)

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.

Other Details
Locations North West
Commonwealth waters adjacent to Western Australia
Titles (or other instruments) WA-28-L
Current Documents (Finalised)
EP Document

Location map