[Update: The Brasilian press is reporting wide criticism to Haroldo Lima who at the moment is denying he announced the find: “I haven't announced anything, nor did I used that word [anoucement] at any moment.” (hat tip Carolus Obscurus).]

Reuters reported yesterday:

Haroldo Lima told reporters the find, known as Carioca, could contain 33 billion barrels of oil equivalent, five times the recent giant Tupi discovery. That would further boost Brazil's prospects as an important world oil province and the source of new crude in the Americas.

"It could be the world's biggest discovery in the past 30 years, and the world's third-biggest currently active field," Lima, head of the government's oil and fuel market regulator, told reporters at an industry event in Rio de Janeiro.