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Activity - Otway Development Drilling and Well Abandonment

Activity details
Organisation Beach Energy (Operations) Limited
Project Otway Offshore Development (Thylacine and Geographe)
Activity types Drilling
In-force EP 4963
Submission date 29 August, 2019
Outcome Accepted
Acceptance date 09 February, 2021
Locations Otway
Start date 15 March, 2022
Stop date 18 May, 2022
Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact
Mika Porter
Phone: +61883382833

Activity Description
Beach Energy (Operations) Limited (Beach), proposes to drill up to six development wells and abandon three existing subsea wells in Commonwealth waters of the Otway Basin. The development well closest to shore is approximately 54 km from Port Campbell off Victoria’s south-west coast. The proposed development wells and existing subsea wells for abandonment are in water depths ranging from approximately 84 m to 105 m.

Development drilling and well abandonment activities are proposed to be undertaken by a semi-submersible mobile offshore drilling unit (MODU). The Ocean Onyx is currently proposed to undertake this activity. The Ocean Onyx is a conventionally moored, non-self-propelled, column-stabilised semi-submersible MODU owned and operated by the Diamond Offshore General Company (Diamond Offshore).

The operational area for the drilling program has been defined as a 2 km radius around the well sites whilst the drill rig is moored on location. The 2 km radius encompasses both the outer extent of mooring equipment on the seabed, and the 500 m rig safety exclusion zone (RSEZ).

The Otway Development Drilling and Well Abandonment Program will commence at a date to be determined which will be after 1 January 2021 and will be completed before 31 October 2022. The program will take up to 22 months. Drilling, completion and well testing is expected to take between 64 to 90 days per well, depending on the final work program and potential operational delays. Well abandonment activities are estimated to take approximately 30 days per well.

Drilling and support operations will be conducted on a 24-hour basis for the duration of the program.
The activities included in this EP are: Drilling activities including MODU operations and any pre-lay anchoring operations; routine support activities such as vessel operations, helicopter operations and ROV operations; and emergency response activities.
Location map (click to enlarge)
Location map - Activity: Otway Development Drilling and Well Abandonment (refer to description)

Accepted EP Documents

EP Document A768209 (20.6 MB)
OPEP Document A768210 (7.34 MB)
OSMP Document A768211 (839 KB)
Additional Documents A768212 (4.18 MB)

Related EP assessments

4963 (Click to view)