Investor Presentaiton

Exploration Significant value to be realised from exploration ■ Focused portfolio targeting emerging plays and discontinuities in proven hydrocarbon basins ☐ PremierOil Significant position in the Andaman North Sumatran Basin; > 12 TCF of amplitude supported gas identified High value, infrastructure-led exploration inventory being matured on new 3D data adjacent to the Tolmount field ■ New 3D datasets over Mexico acreage confirm the potential of Sureste Block 30 and Burgos Blocks 11 and 13 ■ High impact drill ready prospects in Brazil Exploration Portfolio: COS vs Net NPV(10) at sanction vs Net EMV(10) at sanction Burgos Mesozoic Andaman II Bubble size = Net EMV(10) at sanction November 2020 NPV(10) at sanction ($m) Berimbau Greater Tolmount Area Burgos Cenozoic Wahoo South Andaman Tuna Maraca Tatajuba 0% 10% 20% 30% 40% 50% COS 60% 70% 80% 90% 100% Brazil prospect O Indonesia prospect O Mexico prospect UK prospect P17

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