ExplorationExxonMobil targets two more wells in relentless Guyana drilling campaignMore than 11 billion barrels of oil equivalent have already been found in StabroekKeep on drilling: the Stena Drilling drillship Stena Carron is one of six rigs working for ExxonMobil offshore Guyana.Photo: STENA DRILLINGFabio PalmigianiRio de Janeiro