PTTEP Operations Overview

Project information 4/5 Partners Project Status* Phase PTTEP's Share (as of April 2021) 6M 2021 Average Sales Volume ** Gas (MMSCFD) Liquid (KBPD) Other International 1 PTTEP Australasia (PTTEP AA) OP Exploration 100% Total, Mitsui, 26.5%,20% JV 2 Mozambique Area 1 ENH, OVL Development 8.5% 15%, 10% OVRL & Oil India, 10%, 10% Bharat Algeria 433a & 416b PetroVietnam 3 JOC Production 35% (Bir Seba) Sonatrach 2021 Key Activities PTTEP • AC/RL7 (Cash Maple) and Oliver (AC/RL12) Field under way to define proper direction in order to increase development opportunities • Other exploration projects: G&G studies • First Cargo is expected by 2024 (Under further assessment) • 1st Debt drawdown in project Finance • The Force Majeure has been declared by the operator for safety reason due to the security incident in Palma. • Project management under FM and study of impacts • Plan to resume the project after safety security • Drill development wells Existing wells intervention • Production respect OPEC+ policy . Drilling development wells • Expected first oil production for the initial phase of around 10,000-13,000 barrels per day (BPD) in 2021 40% 3 25% • Algeria Hassi Bir 4 OP Rekaiz Development 24.5% CNOOC Sonatrach 24.5% 51% 5 Mariana Oil Sands OP Exploration 100% 65% Shell Brasil 6 Barreirinhas AP1 JV Exploration 25% 10% Mitsui E&P Brasil • Waiting for exploration wells drilling permit from the government JV Petrobras 7 Brazil BM-ES-23 Exploration 20% INPEX 65% • Evaluating the petroleum potential for development concept 15% JV PC Carigali Mexico 60% 8 Mexico block 12 (2.4) Exploration 20% Ophir Mexico 20% Repsol Mexico 30% • JV 9 Mexico block 29 (2.4) Exploration 16.67% PC Carigali Mexico Wintershal DEA 28.33% 25% • The geophysical survey processing and interpretation are in progress for further petroleum potential evaluation . Drilling exploration wells Completed drilling of 2 exploration wells in 2020 with successful result. • The drilling operation for exploration well and appraisal drilling is ongoing, and it is expected to complete by Q4/2021. ** Status: OP = PTTEP operatorship / JOC = PTTEP joint operatorship/ JV = PTTEP as Joint Venture Partner Sales volume stated at 100% basis except for Algeria 433a & 416b (production volume) 40 40

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