Activity details

Organisation	Western Gas (70 R) Pty Ltd
Project
Activity types	Other survey
In-force EP	7302
Submission date	16 December, 2022
Outcome	Accepted
Acceptance date	26 July, 2023
Locations	North West
Start date	09 March, 2016
Stop date	20 May, 2016
Lifecycle Classification	Decommissioning

Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact

Activity Description

Western Gas is proposing to permanently leave in situ a total of four subsea wellheads associated with four abandoned exploration wells, namely Chester-2, Glencoe-2, Mentorc-2 and Snapshot-1 in Petroleum Permits WA-70-R and WA-474-P. Plugging and abandonment of these wells has already occurred and are described in the accepted Well Operations Management Plan (WOMP) and Well Abandonment Reports for each well. In addition, the Glenloth-1 well is to temporarily remain as a suspended well. Western Gas is proposing to undertake annual vessel-based wellhead survey activities on the suspended well, which is located in Petroleum Permit WA-70-R. All wells are located approximately 180 km northwest of Onslow and 150 km north of Exmouth, Western Australia at water depths between 1,116 and 1,131 metres.

Location map (click to enlarge)

Accepted EP Documents

EP Document	A947533 (16.7 MB)
OPEP Document	A947540 (1.01 MB)
NOPSEMA Report	A959510 (208 KB)
Additional Documents	A999772 (79.3 KB)
Appendices	A922381 (10.5 MB)

Related EP assessments

7302 (Click to view)

4120 (Click to view)

3206 (Click to view)