Nearly 3 kilometers of seawater, roughly 9,500 feet, separate the surface from the ocean floor at the spot where Petrobras has found oil for the second time. The state-controlled oil company made the announcement on Friday (October 2), involving the Morpho well in block FZA-M-59, in the Foz do Amazonas Basin, in ultra-deep waters off the coast of Amapá, in Brazil's far north.
For consumers, nothing changes at the pump right away: any effect on fuel prices would take years. The discovery matters for the longer run because Brazil's pre-salt output, today the country's main source of oil, is expected to peak between 2034 and 2035 and decline after that, according to G1.
The well sits between 150 and 175 kilometers (about 95 to 110 miles) off the coast of Oiapoque, according to Folha de S.Paulo and G1. Petrobras had already announced a first discovery in the same well in August. By drilling deeper, it found a new oil-bearing zone, confirmed by analysis of rocks and fluid samples.
"The new discovery expands knowledge about the exploratory potential of the area and will provide additional information for assessing the petroleum systems and resource potential of the Foz do Amazonas Sedimentary Basin," Petrobras said in a statement.
Samples from the new zone will undergo laboratory analysis. On the oil found in August, the company said tests have already confirmed its good quality.
Morpho is the first deep-water well drilled in the Foz do Amazonas Basin. For Petrobras, the region is strategic for replacing reserves once pre-salt output declines. If the area becomes a producing province, Amapá, one of Brazil's poorest states, would start receiving royalties, the payments states and municipalities get from oil production, along with jobs.
What a discovery actually means
Finding oil does not mean it can be extracted. Petrobras still has to finish drilling and run further studies to estimate the volume in place and determine whether commercial production is viable.
There is also the environmental licensing stage. The permit granted by Ibama, Brazil's environmental regulator, in October 2025 covers only Morpho, while three other wells planned for the block still await review. Scientists and environmental groups warn of risks to reefs and mangroves, plus impacts on artisanal fishing and traditional communities, according to G1.
Interest in the region goes beyond Petrobras. According to Folha, U.S. giants Exxon and Chevron began exploratory activities in the Foz do Amazonas in late October, starting with seismic surveys. Exxon operates five concessions in the area; Chevron, nine. The industry is betting on a new frontier similar to the one that turned neighboring Guyana into an oil producer in recent years.