Brazil's state-run oil company says the out-of-court deal ends litigation filed with a US federal court by investors affiliated with the Vanguard Group.
A series of factors have slowed development of oil and gas pipeline projects throughout Latin America, a BNamericas report says.
Offers to conduct concept studies for development of the country's second regasification complex are due this month.
The investments include an investment of US$300mn by Repsol for block 57, a new gas compression plant, and new pipelines and reactivation of the Sagari 4X well.
The nation recorded near record low reliance on oil revenue in the first four months of 2017.
May crude output from Brazilian fields reached 2.18Mb/d, up 3.9% on the April figure, the state-run energy giant said on Monday.