In September 2007, Statoil and the Brazilian oil company Petrobras signed a deal aimed at expanding exploration, sub-sea, and biofuels cooperation. Under the agreement, Statoil became a partner on six offshore licenses, as well as expanding biofuels production. Petrobras and Statoil announced plans to create dozens of refineries in Brazil and the rest of the world where vegetable oil will be added to crude to create a no-sulphur fuel. On 4 March 2008, Statoil bought Anadarko Petroleum's 50% share of the Peregrino oil field for US$1.8 billion.