PTTEP Energy Project Overview

E&P Business | Reserves MMBOE Reserves Life 2021 by Geography 2,500 Domestic International 2,123 11.7 Years 2,123 2,000 1,647 1,622 1,350 773 54% 1,500 7.5 Years 55% 507 548 46% 45% 1,000 1,350 500 1,140 1,074 As of December 2021 2019 2020 2021 Proved (P1) Probable (P2) 5-Year Average Proved Reserves Replacement Ratio (RRR) 2019 1.5X 2020 1.5X 2021 1.9X P1 P1 + P2 2021 by Product Type Gas Liquid 2,123 1,350 30% 26% 70% 74% P1 P1 + P2 • Based on total production of natural gas, condensate, and crude oil (including LPG) of 495 KBOED for the year ended December 31, 2021 • Figures include reserves from equity method 20 20 PTTEP

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