PTTEP Energy Project Overview

Unit Cost Unit: $/BOE 40 28.82 28.52 28.79 29.39 30 28.00 28.18 Cash Cost Unit Cost 20 15.46 14.50 13.25 13.61 14.29 12.43 ☑ 10 2021 Q2 22 Q3 22 Q3 21 9M 2022 9M 2021 DD&A 15.27 13.33 14.32 15.78 13.71 15.75 Finance Cost 1.33 1.50 1.42 1.35 1.43 1.34 Royalties 3.49 4.22 3.88 3.44 4.11 3.42 G&A 2.22 2.47 1.66 1.78 2.11 1.94 Exploration Expenses 0.54 * 0.40 0.95 1.31 0.51 0.55* Operating Expenses. 5.67 6.87 6.59 5.73 6.13 5.18 Lifting Cost 4.13 4.35 4.50 4.12 4.22 4.06 Note: * Exclude Exploration assets write-off in Brazil for 9M 2021, and 2021 All Unit Cost shown above exclude costs related to new business The formulas for calculating ratios are provided in the supplementary section for your reference 14 PTTEP

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