Mooring preparations underway for Essington-1 well offshore Australia

ConocoPhillips should start drilling the first of back exploration wells offshore Victoria in mid-October, with mooring operations progressing ahead of the arrival of the Transocean Equinox rig.
Oct. 6, 2025

Pre-lay mooring operations have started for the ConocoPhillips-operated Essington-1 exploration well in the Otway Basin offshore Victoria, ahead of the arrival of the Transocean Equinox semisubmersible drilling rig.

Essington partner 3D Energi expects drilling to start in mid-October, subject to weather and operating conditions, as part of Phase 1 of the Otway Exploration Drilling Program.

Anchors and mooring chains will also be deployed at the Charlemont-1 well location in the offshore VIC/P79 permit; here, drilling is set to begin between November and December.

All regulatory approvals have come through from NOPSEMA, Australia’s National Offshore Petroleum Safety and Environmental Management Authority, including the environment plan. 

In mid-September, South Korean state oil company KNOC completed a farm-in deal with ConocoPhillips, gaining a 29% interest in VIC/P79 and the T/49P offshore exploration permit.

ConocoPhillips retains a 51% controlling interest, and 3D Energi holds 20%. 

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About the Author

Jeremy Beckman

Editor, Europe

Jeremy Beckman has been Editor Europe, Offshore since 1992. Prior to joining Offshore he was a freelance journalist for eight years, working for a variety of electronics, computing and scientific journals in the UK. He regularly writes news columns on trends and events both in the NW Europe offshore region and globally. He also writes features on developments and technology in exploration and production.

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