Brazil covers a large surface area and about 6 436 000 km2, including the continental margin, are covered by sediments. The onshore portion, 4 885 000 km2, is divided into more than 20 Proterozoic, Paleozoic, and Tertiary basins (Figure 1)—most being virtually unexplored or underexplored for oil and gas. Petroleum exploration began in 1954 with the creation of Petrobrás (Brazilian State Oil Company) and implementation of the state monopoly. Exploration has mainly focused on the offshore continental margin. Two major exceptions are Recôncavo and Sergipe-Alagoas basins which have been explored since the 1960s.

...

In...

You do not currently have access to this article.