Local firm Roch has made a discovery in the Angostura area of Tierra del Fuego.
BNamericas' latest Political Risk report says the private sector has been buoyed by new opportunities in Brazil's electric power and oil sectors.
Five companies have joined a government initiative that already includes Gas Natural Fenosa and Gasnor.
The facility had been closed due to flooding and a fire caused by hurricane Calvin that killed a worker in June.
A total of 66 firms have begun operating in Mexico's oil and gas sector, half of them foreign, as a result of the eight auctions held so far.
ExxonMobil is helping the Caribbean nation build up its upstream library.
Executives from Eni and Venezuelan state oil company PDVSA discussed joint exploration and production opportunities during a meeting on Thursday.
ExxonMobil's fifth discovery in the country could see oil production hit 400,000b/d by 2026, according to Wood Mackenzie.
The Indian and German companies made winning bids to develop onshore fields in partnership with state oil firm Pemex, while no bids were received for the shallow water fields on offer.