Field_DevelopmentExxonMobil eyes change of tack for fourth Guyana floaterUS supermajor mulls competitive bid instead of direct talks with SBM OffshoreNext in line: hull of the Prosperity FPSO that is due to enter production at the Payara-Pacora development off Guyana in 2024Photo: SWSFabio PalmigianiGareth ChetwyndRio de Janeiro/London