Otway Offshore Operations - Casino, Netherby & Henry Revision
|Activity type||Operation of a petroleum pipeline|
|Submitted by||Cooper Energy (CH) Pty. Ltd.|
|Submission date||18 July, 2022|
|Status||Under assessment (with NOPSEMA)|
|Link to previously accepted EP|
Phone: +61 8 8100 4900
The Otway offshore gas fields and facilities are situated off the coast of Port Campbell, Victoria. The gas fields are located within production licences excised from the greater VIC/P44 licence area. Gas (and small quantities of condensate) are produced via subsea wells in Cwth waters, ~60-70m water depth. The gas is transported through subsea pipelines located in Cwth and State waters to the Athena Gas Plant onshore, where it is processed and then directed to the domestic gas pipeline network.
Production commenced in 2006 from the Casino field (Stage I), with subsequent stages integrating additional fields, wells and connecting flowlines to top-up production, supplying continued demand in the domestic market.
Cooper Energy became operator of the facility in 2017 and owners in partnership with Mitsui E&P Australia and Peedamullah Petroleum, original partners of the VIC/P44 joint venture.
The Otway Offshore Operations Environment Plan provides for a range of offshore activities within the greater VIC/P44 licence area and associated excised licences:
- Operation of the offshore facilities in Commonwealth and State waters
- Inspection, Maintenance and Repair activities
- Seabed surveys (geotechnical / geophysical)
- Installation and integration of Stage III fields (Annie, Juliet).
The Otway offshore facilities are entirely subsea. During normal operations the subsea facilities are monitored and operated by specialist operators at the Athena Gas Plant. Periodic offshore campaigns to inspect, maintain, repair and install infrastructure / equipment are undertaken by vessels and mobile offshore drilling units (MODU). Campaign durations range from a few days to months, and the activities are undertaken on a 24/7 basis. To support offshore campaigns, shore bases are established in regional and / or metropolitan Victoria for the duration.