• Charlemont-1 gas discovery in offshore Otway Basin
• Progressing Sauropod 3D seismic survey in WA-527-P permit
• Ongoing work on gas storage project GSEL 759 in South Australia

3D Energi Ltd (ASX: TDO) has provided an update on its activities for the quarter ending 31 March 2026. Key highlights include:Otway Exploration: The company holds a 20% non-operated interest in the VIC/P79 and T/49P permits in the offshore Otway Basin. The Charlemont-1 exploration well intersected gas across the Waarre C, B and A reservoirs, representing the second gas discovery under the Otway Exploration Drilling Program.West Coast Exploration: 3D Energi operates the WA-527-P permit in the Bedout Sub-Basin offshore Western Australia. The company is planning the Sauropod 3D seismic survey to fully image potential incised valleys and identify prospects for future drilling. The environmental plan for the survey is currently under assessment by the regulator.East Coast Gas Storage: The company holds the GSEL 759 licence in the onshore Otway Basin of South Australia, where it is progressing a gas storage development project. There were no significant updates during the quarter.Corporately, the company noted ongoing issues related to cash calls and potential dilution of its interest in the VIC/P79 permit, which has resulted in a delay in finalizing its half-year financial report.