Petrobras sees proven oil & gas reserves shrink
Brazil to double oil and gas licenses permanently on offer
Crypto gamble: Will the 'petro' save Venezuela?
Chilean NOC Enap continues strong performance in 2017

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Tax issue to negatively impact Petrobras' Q4 results
Brazil's Petrobras in executive reshuffle
Argentina appoints new heads of gas, grid regulators
Colombia unemployment rate rises despite oil rebound
Colombia suspends ELN peace talks after 7 police killed
Argentina authorizes grid access for YPF project