Brazil’s Petroleo Brasileiro SA (Petrobras), in an effort to reduce its dependence on imports from neighboring Bolivia, has announced the signing of two contracts for the purchase of LNG from Britain’s BG Group PLC.“This is one more step toward setting up infrastructure to guarantee greater flexibility in the Brazilian gas market,” said Petrobras Pres. Jose Sergio Gabrielli de Azevedo in announcing the agreements.Analyst Global Insight said the agreements, which mark Brazil’s conversion to an importer of LNG, also will give the country more flexibility to meet demand for gas from an electric power network that is predominantly hydroelectric.Under the agreemen...