HONG KONG, Dec. 2, 2025 — CNOOC Limited (the “Company”, SEHK: 00883 (HKD Counter) and 80883 (RMB Counter), SSE: 600938) declared today that the Weizhou 11-4 Oilfield Adjustment and Satellite Fields Development Project has commenced production.

The project is situated in the Beibu Gulf Basin of the South China Sea, operating at an average water depth of approximately 43 meters. This development leverages adjacent existing facilities. Its principal production installations comprise a newly constructed unmanned wellhead platform and a central processing platform, which are linked to an existing platform via a trestle bridge. A total of 35 development wells are scheduled for commissioning, consisting of 28 production wells and 7 water injection wells. The project is anticipated to reach a plateau production of approximately 16,900 barrels of oil equivalent per day in 2026. The oil extracted is light crude.

The project has adopted a coordinated development strategy of “three offshore processing centers + one onshore terminal,” functioning as a collection and transport hub to optimize resource capacity and ensure a consistent energy supply in the region.

CNOOC Limited holds a 100% interest in this project and is its operator.

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Further information about the Company is accessible at .

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This press release contains forward-looking information, including statements concerning the probable future advancements in the business of the Company and its subsidiaries, such as projected future occurrences, business outlook, or financial outcomes. Terms like “expect,” “anticipate,” “continue,” “estimate,” “objective,” “ongoing,” “may,” “will,” “project,” “should,” “believe,” “plans,” “intends,” and analogous phrases are used to denote such forward-looking declarations. These assertions stem from assumptions and analyses conducted by the Company as of this date, considering its experience and understanding of historical patterns, present circumstances, and anticipated future progressions, alongside other factors the Company presently deems fitting given the situation. Nonetheless, it remains uncertain whether actual results and developments will align with the Company’s current expectations and forecasts. Actual outcomes, operational performance, and financial status could diverge significantly from the Company’s projections, including, but not limited to, variations linked to macro-political and economic influences, volatility in crude oil and natural gas costs, the intense competitive landscape of the oil and natural gas sector, climate change and environmental regulations, the Company’s pricing estimates, merger, acquisition, and divestment endeavors, HSSE and insurance frameworks, and shifts in anti-corruption, anti-fraud, anti-money laundering, and corporate governance legislation.

As a result, all forward-looking declarations presented in this press release are subject to these precautionary remarks. The Company cannot guarantee that the anticipated results or developments will materialize, or that, even if largely achieved, they will have the projected impact on the Company, its business, or its operations.

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For additional inquiries, kindly contact:

Ms. Cui Liu
Media and Public Relations
CNOOC Limited
Telephone: +86-10-8452-6641
Facsimile: +86-10-8452-1441
Email:  

Mr. Cheng Yao
Ever Bloom (HK) Communications Consultants Group Limited
Telephone: +852 5540 0725
Facsimile: +852 2111 1103
Email:     

Source: CNOOC Limited