China Petrochemical Corp, the nation’s biggest refine, is in talks to buy a stake in Galp Energia SGPS SA (GALP)’s division in Latin America’s second-biggest oil producer, Bloomberg said Wednesday, quoting resources.

The refiner may also bid for a share in Marathon Oil Corp.’s Angolan operations, two people with knowledge of the asset sale were quoted as saying.

GALP, the Portugal-based firm, has declared early to sell a 40 percent of stake in a unit in Brazil for 2.7 billion U.S. dollars, with a bidding deadline this month.