Development of the Argentine potash project was suspended in 2013.
Authorities open economic offers for contract to carry out FEED-EPC work.
Assets in Brazil, Peru and Canada are included in the deal, while Argentina's Rio Colorado will depend on due diligence.
An increase in Mexico's oil output, which has declined by around 1Mb/d over the last decade, is still a long way off as blocks auctioned this year and last will take time to begin production, according to Ángel Navarro, a local academic and consultant.
Operations are scheduled to begin in the coming months.