ExplorationGreen light for Aker BP’s Grefsenkollen wildcatAker BP wants to explore prospect more than 2000 metres below shut-down East Frigg fieldDrill ready: Odfjell Drilling's Deepsea Nordkapp is on site, ready to spud the Grefsenkollen prospectPhoto: ODFJELL DRILLINGOle Ketil HelgesenStavanger