Brazil's state-owned Petrobras confirmed the discovery of a significant amount of light oil in the Santos Basin. The confirmation was made after the company conducted tests in a vertical well and detected a flow of 4,900 barrels of oil and 150,000 cubic meters of natural gas per day. The highly productive reservoir was found under a 2,000-meter thick layer of salt, also known as pre-salt. Petrobras said it would make further investigations to determine the total oil and gas reserve of the well. According to experts, a reservoir that lies underneath a layer of pre-salt is commercially viable if its total capacity exceeds 700 million barrels.