The shortlisted basins are the well-known Campos and Espirito Santo and the relatively new frontier basin of Santos in the country's southeastern region.
The regulator also will carry out studies in the lesser-known basins of Para-Maranhao, Parnaiba, Pernambuco-Paraiba, Potiguar and Reconcavo.
The classification of the blocks will be the same as the 2006 licensing round, the statement said.
The areas are designated high potential, new frontier and mature.
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