Brazil Campos Oil Output Rises but Sits Near 25-Year Low

Brazil · Energy

The basin that built Brazil’s offshore oil industry is producing again — but a new analysis warns that years of under-investment have left it near its weakest output in a quarter-century.

Why Campos Basin oil output remains historically low

Production in the Campos Basin, the offshore province off the coast of Rio de Janeiro state that anchored Brazil’s oil industry for decades, edged higher in 2025 but still ranked as the third-lowest annual output in 25 years. The assessment comes from INEEP, an energy-sector research institute, drawing on data from the National Agency of Petroleum, Natural Gas and Biofuels, the regulator known as the ANP.

The institute was direct about the cause. While the natural maturation of ageing fields is a genuine factor, it said, the intensity of the retreat is directly associated with a reduction in spending on exploration and production and on exploratory activity. In other words, the basin’s decline is not simply geological destiny but partly a consequence of where the industry has chosen to put its money — and for more than a decade that has meant the pre-salt fields of the neighbouring Santos Basin rather than the older post-salt reservoirs of Campos.

A legacy basin overshadowed by the pre-salt

The scale of the shift is stark. Campos accounted for roughly 19.7% of Brazil’s oil and gas production in 2025, while the Santos Basin — home to the deepwater pre-salt fields discovered from 2006 onward — supplied close to 78%. Brazil’s overall output hit a record 4.897 million barrels of oil equivalent a day in 2025, up 13.3% on the year, but that growth was driven almost entirely by new floating platforms entering service in the Santos pre-salt, not by the older basin to its north.

Campos is far from idle. Six exploratory wells were drilled there in 2025, equivalent to 32% of all wells drilled in Brazil and 60% of the country’s offshore drilling. The basin had 39 platforms operating in December, of which 18 were floating production, storage and offloading vessels that together accounted for 66.1% of regional output. Petrobras remained the dominant operator, responsible for 70.4% of basin production at 583,300 barrels of oil equivalent a day, alongside a roster of private operators including Prio, Shell, Trident Energy, Brava Energia and Perenco that have taken over many of the mature fields Petrobras has been divesting.

What it means for Brazil’s oil future

The finding matters because it sharpens a question hanging over Brazil’s status as a major crude exporter: where the next decade of production will come from. The pre-salt fields that now carry the industry face their own eventual decline, and Petrobras has been working to extend the life of legacy assets — consolidating ownership of mature Campos fields and reporting fresh pre-salt discoveries beneath older producing layers there. At the same time, the company and the government are betting heavily on the untapped Equatorial Margin along Brazil’s northern coast as the long-term replacement.

For now, the INEEP analysis is a reminder that Brazil’s record headline output masks an uneven picture beneath the surface. The country is producing more oil than ever, but it is doing so by leaning ever harder on a single basin while an older one that still holds substantial reserves slips toward its weakest performance in a generation. For foreign investors weighing Brazilian energy exposure, the divergence underscores both the productivity of the pre-salt and the cost of letting mature provinces run down without sustained reinvestment.