ExclusivePetrobras prepares to resume exploration drilling in frontier Barreirinhas basinBrazilian oil giant to carry out new deep-water campaign more than a decade after the last probe was drilled in the regionCampaign: the Ocyan drillship ODN II is to start exploration drilling in Brazil’s northern equatorial margin later this yearPhoto: OCYANFabio PalmigianiRio de Janeiro