The bidders were Raiser-Energia Argentina, which offered a 41.5% production share starting in the sixth year, Oil M&S with 32.1%, Petrolifera Petroleum America with 29.1% and Gregorio Numo-Noel Werthstein-Petrosiel-Energial with 28.3%.
The offers exceed current contract royalties paid by the province and will "surely impact" the national oil sector, governor Carlos Alberto Verna said.
The province expects to issue a decision on July 25.
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