Petróleo Brasileiro S.A. - Petrobras operates in the oil, natural gas, and energy industries. The company’s Exploration and Production segment engages in the exploration, development, and production of crude oil, natural gas liquids, and natural gas, and sale of surplus crude oil and oil products produced in the natural gas processing plants to the domestic and international markets. Its Refining, Transportation and Marketing segment is involved in refining, logistics, transport, and trading of crude oil, exportation of ethanol, and extraction and processing of shale, petrochemical companies.