BEIJING, Feb 26 (Reuters) - China's CNOOC Ltd said on Friday it had tapped the country's first ultra-deepwater natural gas discovery in the northwestern part of the South China Sea.
The state-owned offshore oil and gas explorer started to drill the Lingshui 18-1-1 exploration well last October in water depths of 1,688 metres (5,538 feet) and a test of the well in December was a success, the company said in a report published on the website of parent company China National Offshore Oil Corp (www.cnooc.com.cn).
An "ultra-deep" well is categorized as one more than 1,500 metres under the sea.
The report didn't give any estimate of gas flows at Lingshui 18-1-1, but said the discovery has been certified by the Ministry of Land & Resources.
It's located next to another deepsea gas find Lingshui 17-2, which has certified proven reserves exceeding 100 billion cubic metres as reported by the state media a year ago.
CNOOC deployed the country's flagship deepwater rig, the "Haiyang Shiyou 981", to drill the well, the report said.
(Reporting by Chen Aizhu; Editing by Christian Schmollinger)
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