By Marianna Parraga HOUSTON, March 14 (Reuters) – Brazil’s state-run oil firm Petrobras (PETR4.SA) is in talks with U.S. liquefied natural gas (LNG) suppliers for a long-term import deal, a Petrobras executive said. Brazil is Latin America’s largest oil producer, but consumes more gas than it produces and relies on imports to fill the gap. … Read more