Banner image

Activity - Woollybutt Field Decommissioning

Activity details
Organisation Eni Australia Limited
Project Woollybutt
Activity types Decommissioning, dismantling or removing a facility
In-force EP 6768
Submission date 30 September, 2021
Outcome Accepted
Acceptance date 16 May, 2022
Locations North West
Start date 25 November, 2022
Stop date Pending titleholder notification
Lifecycle Classification Decommissioning
Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact
Joe Covic
Phone: 08 9320 1111

Activity Description
The Woollybutt Field is located approximately 80 km off the northwest coast of Western Australia in Lease Area WA-25-L. The Field is approximately 30 km west of the Barrow Island Marine Management Area and Marine Park boundary, and more than 50 km south-west of the Montebello Islands Marine Park.

The scope of this Environment Plan (EP) covers the decommissioning of the following infrastructure within Permit Area WA 25 L: six steel mooring anchors and chains, eight concrete umbilical crossing mattresses and 16 grout bags, approximately 10 km of umbilicals and jumpers, and approximately 20 km of flexible flowlines and jumpers.

Property described to be covered is: DSPM mooring anchors and chains, umbilical crossing mattresses (8) and grout bags (16), umbilicals and jumpers (10) totalling 8.3 km length, flexible reinjection flowlines and jumpers (4 flowlines, 4 jumpers, 4 risers) with a combined length of 20.1km.

This EP proposes to recover the above Woollybutt field infrastructure for disposal onshore with the exception of the buried DSPM mooring anchors and the buried sections of mooring line. The activity is proposed to be undertaken in 2022 with a duration of 60-90 days.

Location map (click to enlarge)
Location map - Activity: Woollybutt Field Decommissioning (refer to description)

Accepted EP Documents

EP Document A840384 (10.3 MB)
NOPSEMA Report A843204 (95.1 KB)

Related EP assessments

6768 (Click to view)