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Activity - Non-production Well Operations (White Ibis-1, Trefoil-1 and Yolla-1)

Activity details
Organisation Beach Energy (Operations) Limited
Project Otway Offshore Development (Thylacine and Geographe)
Activity types Any other petroleum-related activity
In-force EP 5537
Submission date 27 February, 2021
Outcome Accepted
Acceptance date 26 August, 2021
Locations Tasmania
Start date 18 April, 2023
Stop date 17 June, 2023
Lifecycle Classification Decommissioning
Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact
Phil Wemyss
Phone: 0883382833

Activity Description
Beach Energy (Operations) Ltd (‘Beach’) is the operator of retention leases T/RL2 and T/RL4 and production licence T/L1 in the Commonwealth waters of central Bass Strait. Beach is proposing the ongoing suspension and temporary abandonment (TA) of the non-production well operations for White Ibis-1, Trefoil-1 and Yolla-1.

The non-production well operations (White Ibis-1, Trefoil-1 and Yolla-1) Environment Plan covers the continued suspension of the wells and routine and regular subsea visual inspections for well integrity (referred as the ‘Activity’). This activity will occur in water depths ranging from 60 m to 80 m. At its nearest points, the activity area is located 89 km north of Stanley in Tasmania and of 97 km east of King Island.

The subsea visual inspection of the wellheads will be undertaken by an inspection support vessel (ISV) over a duration of 1 - 3 days (duration depending on weather and sea state conditions) at least every 3 years. Qualified contractors will undertake the subsea visual inspections of the wellheads using a remotely operated vehicle (ROV) operated from the ISV. The duration of the visual inspection will take between 1 -2 hours per wellhead on top of the time required for vessel mobilisation, setup, transit and demobilisation.

The ISV is expected to be similar to supply vessels used regularly in the oil and gas industry. The ISV is not likely to anchor on location during inspections; rather it will use dynamic positioning (DP) or similar station keeping systems to maintain position while undertaking the activities. All vessel-based activities will be undertaken on a 24-hour basis.
Location map (click to enlarge)
Location map - Activity: Non-production Well Operations (White Ibis-1, Trefoil-1 and Yolla-1)  (refer to description)

Accepted EP Documents

EP Document A794924 (7.6 MB)
Appendices A794926 (2.08 MB)

Related EP assessments

5537 (Click to view)