Beach Energy (Operations) Limited (Beach), proposes to undertake well completions, well interventions and contingent plug and abandonment (P&A) activities within Commonwealth waters of the Otway Basin (the Program). The proposed scope of the Program covered by the EP consists of:
• Subsea production tree (XT) installation, completion installation, Mobile Offshore Drilling Unit (MODU)-based well flowback/clean-up, with a MODU in wells in VIC/L35 (2 locations), VIC/L36 (1 location), VIC/P43 (1 location), a total of up to 4 locations
• Interventions at up to 2 existing well locations in T/L2
• P&A and removal of wellhead below the mudline for 1 location in VIC/L35 (contingency if decision made not to complete Artisan 1)
Well completion including well flowback/clean-up (flaring), well intervention and contingency P&A activities will be undertaken within a 3 km radius around the well sites whilst the MODU is moored on location. The 3 km radius encompasses both the outer extent of mooring equipment on the seabed, and the 500 m petroleum safety zone (PSZ).
The Operational Area is where planned activities will occur. The Operational Area for the Program activities include a 3 km radius around the well sites whilst the MODU is moored on location. The 3 km radius encompasses both the outer extent of mooring equipment on the seabed and the 500 m petroleum safety zone (PSZ).
Estimated timing for each activity, depending on the final work program and potential operational delays, are:
• Installation of XTs and well completions at up to 4 locations: 100 days total comprising of 25 days per well. This includes MODU-based well flowback/clean-up activities of 24 hours per well.
• Well interventions at 2 existing well locations: 30 days total comprising of 15 days per well
• Contingency P&A at one location (Artisan 1) – 15 - 20 days.
Activities will be conducted on a 24 hours per day, 7 days per week basis. The above timings equate to approximately 150 days of activity for the full Program and will be undertaken within the period of 01 October 2025 to 31 December 2026.
Proposed activities will be undertaken with a single moored semi-submersible drill rig with a thruster assisted mooring system (MODU). The MODU will be supported with up to three vessels.