The 6,000km 2D campaign covers the Ceará basin, part of the Equatorial Margin off the country's north coast.
Río Negro and President Petroleum reach a concession extension deal.
Venezuela's controversial President Nicolás Maduro is the latest Latin American leader to be ensnared in the ongoing Odebrecht corruption scandal.
Just 16 hydrocarbon finds were reported to industry regulator ANP in the first nine months of 2017, down from 19 in the same period of last year. But new auctions for E&P licenses have provided hope that activity is about to rebound.
The recommendations were made to the energy and environmental security agency, the hydrocarbons commission and the energy regulatory commission.