Thailand Energy Market & PTTEP Business Update

Reserves MMBOE Reserves Life 2022 by Geography 2,500 2,286 Domestic International 10.7 Years 2,123 2,286 2,000 844 1,622 1,442 773 48% 6.8 Years 1,500 51% 548 52% 49% 1,000 P1 P1 + P2 1,350 1,442 500 1,074 2020 2021 2022 Proved (P1) Probable (P2) 5-Year Average Proved Reserves Replacement Ratio (RRR) 2020 1.5X 2021 1.9X 2022 2.0X 2022 by Product Type Gas Liquid 2,286 28% 1,442 25% 72% 75% P1 P1 + P2 Based on average production per day of natural gas, condensate, and crude oil (including LPG) of 585 KBOED for the year ended December 31, 2022 Figures include reserves from equity method As of December 2022 23 23 PTTEP

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