Mexico's state oil firm Pemex has awarded a US$10mn offshore seismic survey to the Dutch company.
A call to quantify and certify reserves draws an international crowd and a new bidding process aims to evaluate a field in natural gas-rich Tarija department.
Authorities in the Argentine province also open V Ronda economic bids.
After changing its name from OGpar, Dommo Energia is selling a 30% stake in the BS-4 block off Brazil's southeast coast.
The move follows the signing of an agreement in April between the energy ministry and social development ministry to promote LPG use in marginal rural and urban zones.
The deal with a group led by the International Finance Corporation will see Frontera pay US$225mn in cash over a 36-month period, plus accrued interest.
Despite an ongoing crude price slump, former Petrobras geologist Luciano Seixas Chagas expects intense bidding this month for Brazilian oil and gas blocks that lie up to 7km below the Atlantic Ocean's surface.