Petróleo Brasileiro S.A., commonly known as Petrobras, is a state-controlled Brazilian multinational corporation in the oil and gas industry. The company is one of the world's largest producers of oil and gas, primarily operating in exploration, production, refining, and power generation. Petrobras is particularly known for its deep-sea and ultra-deep-sea exploration and production activities in the vast pre-salt offshore reserves, which are a major component of Brazil's economy.