Brazil expands pre-sal oil exploration to Amazon mouth

Brazil is expanding its pre-sal oil exploration into the mouth of the Amazon River to boost national reserves [1, 2].

The move is critical for Brazil's energy security as the government seeks to maintain self-sufficiency while facing the natural depletion of existing fields. However, the expansion into the Foz do Amazonas region occurs amid global pressure to reduce fossil fuel reliance to combat climate change [1, 2].

The Agência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP) has integrated this region into the broader strategy for pre-sal growth. The ANP held a licensing round for the Amazon mouth block on Oct. 22, 2026 ^[2].

“A expansão para a foz do Amazonas representa a nova fronteira do pré‑sal brasileiro,” said Ana Paula de Souza, director of ANP ^[2].

The pre-sal fields have become the backbone of the Brazilian energy sector. According to energy analyst João Silva, the pre-sal already accounts for more than 80% of the national oil production ^[1]. This reliance makes the discovery of new reserves a strategic priority for the administration of President Luiz Inácio Lula da Silva.

The drive for expansion comes as Brazil reflects on two decades since the initial discovery of the pre-sal in 1996 ^[1]. While the government frames the project as a necessity for stability, some observers describe the move as a silent expansion of fossil-fuel frontiers with limited public debate ^[2].

“Manter a autossuficiência energética é o grande desafio do país nos próximos anos,” said Maria Oliveira, a columnist at O Globo ^[1].

The exploration targets the state of Pará, where the Amazon River meets the Atlantic Ocean. The government maintains that replenishing these reserves is the only way to ensure the country does not become dependent on foreign energy imports in the coming decade [1, 2].