BG Group PLC (BG.LN) and its partners in oil discoveries off the coast of Brazil said Friday that they have ordered two additional oil production vessels that will lift capacity in the area to 1.84 million barrels a day by 2017.

BG Group tendered for two floating production, storage and offtake vessels, or FPSOs, each with a daily production capacity of 150,000 barrels of oil and 212 million cubic feet of gas, for the Guara Norte and Cernambi fields.

The new tender underpins BG's growth plans, said Chief Executive Frank Chapman in a statement.

The order brings the total number of FPSOs on order for fields in which BG is a partner to 12. One FPSO, with a capacity of 100,000 barrels a day of oil, is already operating on the Lula field, which was known as Tupi until last month.

"Two 120,000 barrel a day FPSOs are due onstream on the Lula field and Guará area in 2013, and contracts for eight 150,000 barrel a day FPSO hulls were awarded in November 2010, with start-up expected between 2015 and 2017," BG said.

Brazilian national oil company, Petroleo Brasileiro SA (PBR), operates the license blocks in which the fields are located. Petrobras and its partners said last month that they would be able to book 8.3 billion barrels of recoverable oil and gas reserves from the Lula and Cernambi fields.

The development of large oil discoveries in the
Santos basin are set to transform Brazil , which is already an economic powerhouse, into a significant energy exporter.