By Brazil Stock Guide – Petrobras (B3: PETR4; NYSE: PBR) said on March 18 it discovered a new gas accumulation in the Copoazu-1 well, offshore Colombia, reinforcing a fast-growing gas cluster near the Sirius fields. The well sits 36 kilometers (22 miles) from shore, in 964 meters (3,163 feet) of water, and adds potential volumes that could support Colombia’s future energy supply.
The Copoazu-1 well lies just 8 kilometers (5 miles) from Sirius-1 and Sirius-2, indicating geological continuity across the GUA-OFF-0 block. Drilling began in November 2025 and remains ongoing. Petrobras identified gas-bearing intervals through electric logs and fluid sampling, including in secondary targets beyond the main objective. The company operates the block with a 44.44% stake, alongside Ecopetrol, which holds 55.56%.
The company said the discovery consolidates the gas province and expands regional supply potential.
Strategic Gas Frontier
The discovery builds on earlier results at Sirius-2, considered Colombia’s largest-ever gas find. Each new well reduces geological risk and supports future development decisions. The cluster could reshape Colombia’s supply outlook as domestic production declines and demand remains stable.
Petrobras is also advancing its reserve replacement strategy. While Brazil’s pre-salt remains core, international exploration adds diversification. Gas projects, in particular, align with the company’s long-term transition strategy.
Who Benefits
Colombia stands to gain the most. A scalable offshore project could delay LNG imports and stabilize supply. Ecopetrol strengthens its domestic position. Petrobras expands its international footprint and adds optionality to its portfolio.
Still, risks remain. Development depends on licensing, infrastructure, and commercial viability. Timelines suggest approvals by 2026 and first gas closer to 2028–2030.
What Comes Next
Copoazu-1 is still under evaluation, with lab analysis pending. Further appraisal drilling will define volumes and reservoir quality. A final investment decision will depend on scale, costs, and regulatory clarity.
The broader signal is clear. The Sirius cluster is no longer a single discovery. It is becoming a basin.