Brazilian state-controlled company Petrobras has opted to return a deep-water field in the prolific Campos basin offshore Brazil that has never produced a single drop of oil.

Discovered by Petrobras in 2003 in water depths ranging from 1700 to 1950 metres, the Catua field was declared commercial in 2006.

Petrobras drilled four wells inside the Catua ring-fence that encountered light 42 degrees API crude oil in carbonate reservoirs.