Thailand Focus 2022

PTTEP Overview | Diversified asset portfolio Central Asia Kazakhstan • Dunga onshore oil field (acquired from Partex in 2019) North America Oil Opportunities in an early phase: • Deepwater exploration in Mexico Book Value of Assets by region Total assets USD 24.19 billion Others 3% Middle East 14% Africa 17% As of Jun 2022 Southeast Asia 26% Thailand 40% . Note: As of June 2022 Subject to local security situation Oil Piped Gas Oil Gas/LNG Oil PTTEP Thailand Home Base • 62% of total sales volume (6M2022) • Key producing assets include G1/61, G2/61, Bongkot, Arthit, Contract 4 and S1 • G1/61 (Erawan) transition completed • G2/61 (Bongkot) transition in process (1st 200mmscfd commenced in Apr 2022) GAS/LNG Southeast Asia Strategic Area • 22% of total sales volume, mainly from Malaysia and Myanmar (6M2022) • Multiple petroleum discoveries in Malaysia including Lang Lebah in SK410B • New exploration block in Malaysia, Sabah SB412 • Other producing assets in Vietnam (oil) and Indonesia (gas) I Africa An area for growth, key projects include: Algeria's Bir Seba oil field with current flow rate of approximately 17 KBPD • Algeria's Hassi Bir Rakaiz oil field with recent 1st oil production in Jun 22. • Mozambique LNG project target 1st cargo in late 2025* Middle East Strategic Area in Oman and UAE • 16% of total sales volume (6M2022) • Oman: 4 onshore blocks including PDO (Block 6), largest producing oil asset, and Block 61, largest tight gas development • UAE: 3 offshore and 1 onshore exploration blocks Australia Potential gas development • Sizable undeveloped gas resources in Timor Sea LO 5

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