Brazilian oil major, Petrobras has put on sale its natural gas fields in Peroa and Cangoa shallow-water, apart from the Malombe deepwater exploration concession. The state-run firm informed in securities filing about initiating the teaser phase of the sale. The fields in Peroa and Cangoa yield about 900,000 cubic meters of gas per day, while the Malombe concession will most likely be declared commercially feasible in 2019.