Petrobras (PETR4) investor relations material

Background and significance of the pre-salt layer

• Pre-salt layer discoveries have driven domestic production growth and technological advancement over seven decades.

• Pre-salt fields now account for about 80% of total production, with Búzios among the most significant.

• Achieved the highest proven reserves in the last decade, with a 100% organic reserve replenishment rate.

Scale, technology, and value creation at Búzios

• Búzios is the world's largest ultra-deepwater field, with high-quality, low-sulfur oil and low emissions (~10 kg CO2e/boe).

• The field covers 852 km², with reservoir thickness up to 480 meters and water depths around 2,000 meters.

• Búzios leads Brazilian fields in production, with rapid cumulative output growth and high productivity.

History and development of the Búzios field

• Discovered in 2010, Búzios reached commerciality in 2013 and began production in 2018.

• Achieved 1 billion barrels of cumulative production by 2023, with peak daily output of 1 million bpd in 2025.

• Multiple FPSOs have been deployed, with further units planned through 2029 to expand capacity.