PTTEP Operations Overview

Project information 5/5 Project Status* Phase PTTEP's Share Other International Partners (as of April 2021) Total 30% Sonangol 30% 10 Block 17/06 JV Pre development 2.5% SSI 27.5% Acrep 5% Falcon Oil 5% 11 Potiguar OP Production 50% Petro reconcavo 50% 12 Dunga Midstream Project ** *** JV Production 20% Total OOCEP 6M 2021 Average Sales Volume ** Gas (MMSCFD) Liquid (KBPD) 2021 Key Activities Completed Begonia FEED study (in-house) • Maintain production plateau 0.2 60% 20% • 2 11 Government of Oman 51% Shell 30% Total 5.54% 1 Oman LNG Shareholder On line 2% Korea LNG 5% Mitsubishi 2.77% Mitsui 2.77% Itochu 0.92% ADNOC Gas On line 2 JV Processing (AGP) ADNOC 2% Shell Total Status: OP = PTTEP operatorship / JOC = PTTEP joint operatorship/ / JV = PTTEP as Joint Venture Partner Sales volume stated at 100% basis Products are propane, butane and naphtha. PTTEP • Continue to curb production per OPEC+ agreement to support price Procurement process for designing of Compression, Separation upgrade and Flare package • Engineering of Sea water and Export Line ⚫ Normal operations 68% • Perform midstream operation activities 15% *** 15% • Maintain production and plant integrity with maintenance work as planned . Improving plant's efficiency and capacity with plant debottlenecking as planned 41 Energy Partner of Choice

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