PTTEP Operations Overview

America: Mexico and Brazil Entry into high potential petroleum province at exploration stage . • . Mexico Deep-water with high petroleum potentials and attractive fiscal regime Mexico block 12 (2.4) Non-operating partner with 20% participating interest Located in the Mexican Ridges, western Gulf of Mexico Currently evaluating petroleum potential and preparing for an exploration well drilling in 2021 MEXICO • • Mexico block 29 (2.4) Non-operating partner with 16.67% participating interest Located in the Campeche, southern Gulf of Mexico Made two successful deep-water oil discoveries with good quality reservoirs in May 2020 The appraisal plan and exploration plan were approved by the Mexican regulators (CNH) on 25 March 2021. Preparing for exploration well and appraisal drilling. Block 12 善 gob.mx Block 29 Exploration phase Mexico block 12 (2.4) & Mexico block 12 (2.4) 36 88 Barreirinhas Basin BRAZIL Espirito Santo Basin Brazil Deep Water Barreirinhas AP1 • Farm-in 25% from BG Group in 2014 PTTEP • Operated by Shell Brasil (65% interest) . Four offshore exploration blocks: BAR-M-215, BAR-M-217, BAR-M-252 and BAR-M-254 Currently waiting for exploration wells drilling permit from the government BM-ES-23 • Acquired 20% interest from Shell in Q3 2014 • Partnered with Petrobras (65%, operator) and INPEX (15%) • Currently evaluating the petroleum potential for further development Energy Partner of Choice

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