Petrobras has started producing oil and natural gas through the FPSO Guanabara, the first definitive production system installed in the Mero field, in the pre-salt layer of the Santos Basin, on 30 April 2022. The platform, of the FPSO type, has the capacity to process up to 180 thousand barrels of oil and 12 million cubic meter of gas, which represents 6% of the production operated by Petrobras, contributing to the expected growth of the company's production. Mero is the third largest pre-salt oil field, behind Búzios and Tupi.The platform arrived at the Mero field at the end of January 2022. During this period, it was connected to subsea wells and equipment, and underwent final tests before starting production. In the first wave, 6 producing wells and 7 injectors will be connected to the FPSO. The platform is expected to reach peak production by the end of 2022.The platform weight is 102,443 tons (equivalent to 258 Boeing 747s); height of 172 meters, equivalent to 4.6 statues of Christ the Redeemer and length of 332 meters, or three football fields. In addition, it has a power generation capacity of 100 megawatts, enough to supply a city of 330,000 inhabitants.Built and operated by Modec, the unit is located more than 150 km off the coast of the state of Rio de Janeiro in a water depth that reaches 1,930 meters. In all, three more definitive platforms are scheduled to come into operation in the Mero field within the horizon of Petrobras' Strategic Plan 2022-2026.The FPSO Guanabara has gas reinjection systems, where the production of gas with a content of 45% of carbon dioxide (CO2), after its own consumption in the FPSO, will be all reinjected into the deposit in order to maintain pressure and improve recovery. of oil, in addition to reducing the release of CO2 into the atmosphere. The gas reinjection will be done alternately with the water injection (Water Alternating Gas - WAG).