PTTEP 13061/00-2214/2021

Investor Relations

Tel. +66(0) 2537 4259, +66(0) 2537 5522

30 March 2021

President

The Stock Exchange of Thailand

93 Ratchadapisek Road, Din Daeng

Bangkok 10400

Dear Sir,

Subject: Oil and Gas Discovery in Sarawak SK405B Project, Offshore Sarawak, Malaysia

PTT Exploration and Production Public Company Limited, or PTTEP wishes to announce that PTTEP Sarawak Oil Limited, a wholly-owned subsidiary of PTTEP, has successfully made a discovery of oil and gas at the first exploration well, Sirung-1, in Sarawak SK405B Project, located in offshore Malaysia.

Commenced in January 2021, the Sirung-1 wildcat exploration well was drilled to a total depth of 2,538 meters where it encountered a significant oil and gas column more than 100 metres in the Sandstone reservoirs. The appraisal well is scheduled to be drilled next year to assess the upside resources.

Sarawak SK405B Project is located in the shallow waters, approximately 137 kilometres off the coast of Sarawak (Bintulu). PTTEP Sarawak Oil Limited is the operator with 59.5 percent participating interest. Mitsui Oil Exploration Company Limited (MOECO) and PETRONAS Carigali Sdn. Bhd. holds 25.5 and 15 percent interest respectively.

Please be informed accordingly.

Sincerely yours,

Phongsthorn Thavisin

Phongsthorn Thavisin

Chief Executive Officer

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PTT Exploration & Production pcl published this content on 30 March 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 30 March 2021 01:08:02 UTC.