Orcadian Energy plc (ORCA) has announced it expects to increase its interest in the P2650 Mid-North Sea High licence from 50% to 100%, following the default and expected withdrawal of joint venture partner Triangle Energy (UK) Pty Ltd. The move, subject to North Sea Transition Authority (NSTA) approval, would give Orcadian sole ownership of a licence containing the Glenlough and Breckagh shallow gas prospects. The company also intends to seek an extension to Phase A of the licence, which currently expires at the end of February 2027, and plans to approach farm-in partners once withdrawal is complete.

Key Points

  • Orcadian Energy plc (ORCA), a North Sea-focused oil and gas exploration and development company
  • Orcadian expects to increase its P2650 licence interest from 50% to 100% following Triangle UK's anticipated withdrawal after a payment default
  • Glenlough prospect estimated at 131 bcf recoverable gas with a 31% chance of success; exploration well costs estimated at £10m–£15m gross each
  • Investors should watch for NSTA approval, the Phase A licence extension decision, and progress on attracting farm-in partners

Triangle UK Default Triggers Orcadian's Expected Sole Ownership of P2650

Triangle Energy (UK) Pty Ltd's parent, Triangle Energy (Global) Limited, entered administration in July 2026 after its joint venture partner Pilot Energy Limited entered voluntary administration. Following non-payment of a cash call, Orcadian issued a default notice on 10 September 2026, and on 9 November 2026 notified Triangle UK that the remedy period had expired. The announcement states Triangle UK has not yet formally withdrawn from the licence, and completion remains subject to NSTA approval and Triangle UK's continued co-operation. Orcadian notes that the withdrawal may be effected through the purchase of Triangle UK for a nominal sum rather than a direct licence interest assignment.

Glenlough and Breckagh Prospects: Resource Estimates and Drilling Costs

The P2650 licence covers nine blocks across the Mid-North Sea High and contains two key prospects. Glenlough is estimated to hold 131 bcf of recoverable gas with a 31% chance of success. The Breckagh prospect comprises two horizons: Upper Breckagh, potentially containing 33 bcf with a 55% chance of success, and Lower Breckagh, potentially containing 105 bcf with a 20% chance of success. All figures are gross unrisked best estimate (2U) prospective resources under SPE-PRMS, effective 1 January 2026. Orcadian estimates the gross cost of each exploration well at between £10m and £15m, citing shallow reservoir depth as a key factor in keeping costs relatively low.

Analogues in Dutch Waters and UK CNS Underpin Orcadian's Development Confidence

Orcadian considers both prospects analogous to established shallow gas developments, specifically the A-block fields in the Netherlands developed by Chevron and currently operated by Petrogas, and the Aviat field in the UK Central North Sea operated by Apache. The company has also identified electromagnetic surveys as potentially suited to the shallow reservoir depth, which may help reduce key geological risks including gas saturation and pay thickness uncertainties. These analogues form part of Orcadian's rationale for pursuing farm-in partners once Triangle UK's withdrawal and NSTA approval have been secured.

Phase A Extension and Farm-In Strategy Central to Orcadian's Next Steps

With Phase A of the P2650 licence due to expire at the end of February 2027, Orcadian has stated its intention to seek a term extension from the NSTA. Upon completing Triangle UK's withdrawal, the company plans to approach potential farm-in partners to progress exploration of the Glenlough and Breckagh prospects. Investors may be watching closely for NSTA decisions on both the ownership transfer and the licence extension, as well as any announcements regarding farm-in interest. Orcadian's ability to attract credible partners under current North Sea market conditions remains a company-specific factor to monitor.