Petroleo Brasileiro S.A.Petrobras, together with its subsidiaries, engages in the exploration, exploitation, and production of oil from reservoir wells, shale, and other rocks in Brazil. It supplies oil, liquefied natural gas, and natural gas to refineries in Brazil; and sells surplus production in Brazil and foreign markets. The company also provides refining, logistics, and transportation services, as well as involves in the purchase of crude oil, oil products, and fuel alcohol. In addition, P ...