The Block SK405B is located in the shallow waters of Balingian Province. Credit: PTT Exploration and Production Plc.

Thailand’s PTT Exploration & Production (PTTEP) and its partners have made new oil and gas discovery in the Sirung-1 wildcat exploration well offshore Malaysia.

The exploration well is situated in Block SK405B production sharing contract (PSC), located in the shallow waters of Balingian Province, approximately 237km off the coast of Miri, Sarawak.

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Drilled to a total depth of 2,538m, the Sirung-1 exploration well encountered significant oil and gas column, exceeding 100m within the Oligocene to Middle Miocene sandstone reservoirs.

The partners plan for an appraisal well in near future to assess the upside resources.

PTTEP CEO Phongsthorn Thavisin said: “The Sirung-1 exploration well marks PTTEP’s third discovery offshore Malaysia following SK410B’s Lang Lebah and SK417’s Dokong. PTTEP also plans to explore nearby prospects in this PSC next year.

“The achievements have strengthened our investment base as we continue to expand our exploration horizon in Malaysia.”

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PTTEP Sarawak Oil operates the Block SK405B with 59.5% interest while MOECO Oil (Sarawak) and Petronas Carigali hold 25.5% and 15% stake respectively.

Petronas exploration, upstream vice president Emeliana Rice-Oxley said: “The Sirung-1 discovery further proves the presence of oil, especially in the under-explored deeper play within the Balingian Province.

“This came after similar success in an infill well at D18 Field. We are well-positioned to pursue a similar play in the other two neighbouring blocks in the same province, namely Blocks SK411 and SK306.”

In February, PTTEP reported its largest-ever oil discovery in the Sarawak SK 410B Project following the drilling of the Lang Lebah-2 appraisal well.