Petrobras confirmed in a statement that the fire reported by the Sindipetro-NF workers union had been extinguished. The fire, which started in Module 4 of the facility, began at about 1 pm local time.
There were no injuries reported.
The FPSO is located in the in the Barracuda-Caratinga field in the Campos basin.
Petrobras said later on Thursday that production had been fully shut in.