PTTEP Energy Project Overview

Projects Details | Rest of the World (as of September 2022) Project Name Status Phase Participating Interest* (%) Sales Vol Gas (MMSCFD) Sales Vol Liquid (KBPD) Latest Status PTTEP 1 PTTEP Australasia OP Exploration PTTEP 90%-100% 2 Mozambique Area 1 JV Development PTTEP 8.5% TotalEnergies, Mitsui, 26.5%,20% ENH, OVL 15%, 10% • • Cash Maple (AC/RL7) and Oliver (AC/RL12): Defining proper direction in order to increase development opportunities Tenacious and Oliver: Well abandonment in progress Other exploration projects: G&G studies Force Majeure was declared by the operator for safety reason due to the security incident in Palma. Plan to resume construction activities after security and safety restored OVRL & Oil India, 10%, 10% Bharat 3 Algeria 433a & 416b JOC Production PTTEP 35% 16 ** Target to tie-in and produce from new wells starting from Q4/2022 (Bir Seba) PetroVietnam 40% Sonatrach 25% 4 Algeria Hassi Bir Rekaiz OP Production GHBR 49% Sonatrach 51% 5 Mariana Oil Sands (Canada) OP Exploration PTTEP 100% 6 Barreirinhas AP1 JV Exploration PTTEP 25% (Brazil) Shell Brasil 65% Mitsui E&P Brasil 10% 1st oil production 1 June 2022 with daily production rate 13 KBPD Continue remaining drilling and construction work to be completed Phase 1 in Q2/2023 Reclamation activities in progress to return the area to Canadian government Divestment is in progress Note: * PTTEP denotes respective PTTEP subsidiaries participating in the project ** Sales volume represent average volume for 100% of the project during 9M2022 except for Algeria 433a & 416b (production volume) Status: OP PTTEP operatorship/JOC = PTTEP joint operatorship/ JV = PTTEP Joint Venture Partner 42

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