CNOOC starts up Weizhou 11-4 oil project offshore China

The shallow-water development in the Beibu Gulf features bridge-linked wellhead and central processing platforms and 28 production wells.
Dec. 4, 2025

CNOOC has started production from its Weizhou 11-4 Oilfield Adjustment and Satellite Fields development in the Beibu Gulf basin of the South China Sea.

The main production facilities, installed in a water depth of about 43 m, comprise a new unmanned wellhead platform and a central processing platform, connected to an existing platform via a trestle bridge. 

CNOOC expects to commission a total of 28 production wells and seven water injectors, and to achieve peak production next year of about 16,900 boe/d of light crude.

The company added that the development, linked to existing offshore infrastructure, would serve as a gathering and transportation hub, including an onshore terminal, to meet energy needs in the region.

In early September, CNOOC brought onstream the Wenchang 16-2 oilfield development in the western Pearl River Mouth Basin of the South China Sea. And in June, CNOOC started up production from its Weizhou 5-3 oilfield development, also in the South China Sea.

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About the Author

Jeremy Beckman

Editor, Europe

Jeremy Beckman has been Editor Europe, Offshore since 1992. Prior to joining Offshore he was a freelance journalist for eight years, working for a variety of electronics, computing and scientific journals in the UK. He regularly writes news columns on trends and events both in the NW Europe offshore region and globally. He also writes features on developments and technology in exploration and production.

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