<div id="readability-page-1"><div> HONG KONG, Jan. 2, 2026 /PRNewswire/ -- CNOOC Limited (the &#34;Company&#34;, SEHK: 00883 (HKD Counter) and 80883 (RMB Counter), SSE: 600938) announces that Buzios6 Project has commenced production safely. <img src="https://imageproxy.pbkrs.com/https://mma.prnewswire.com/media/2051221/CNOOC_Logo_Logo.jpg?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg" width="400" height="372" original-src="https://imageproxy.pbkrs.com/https://mma.prnewswire.com/media/2051221/CNOOC_Logo_Logo.jpg"/> Buzios oilfield is located in the Santos Basin, southeast offshore of Brazil. It is the largest deep-water pre-salt oilfield in the world. Buzios6 is the seventh project commissioned of the oilfield. It will be developed with an FPSO and subsea production system. 13 development wells are planned to be commissioned, including 6 oil producers and 7 injectors. With Buzios6 on-stream, the installed production capacity of the Buzios oilfield will reach 1.15 million barrels per day. The FPSO used in the Buzios6 project has a designed production capacity of 180,000 barrels of crude oil per day and 7.2 million cubic meters of natural gas per day, along with a storage capacity of 2 million barrels. To enhance environmental performance, it is equipped with closed flare to reduce greenhouse gas emissions, and heat recovery devices to reduce energy consumption. CNOOC Petroleum Brasil Ltda., a wholly-owned subsidiary of the Company, holds a 7.34% interest in the Buzios Shared Reservoir, while the operator Petrobras holds 88.99%, and CNODC Brasil Petróleo e Gás Ltda. holds 3.67%. — End — Notes to Editors: More information about the Company is available at https://www.cnoocltd.com. *** *** *** *** This press release includes forward looking information, including statements regarding the likely future developments in the business of the Company and its subsidiaries, such as expected future events, business prospects or financial results. The words &#34;expect&#34;, &#34;anticipate&#34;, &#34;continue&#34;, &#34;estimate&#34;, &#34;objective&#34;, &#34;ongoing&#34;, &#34;may&#34;, &#34;will&#34;, &#34;project&#34;, &#34;should&#34;, &#34;believe&#34;, &#34;plans&#34;, &#34;intends&#34; and similar expressions are intended to identify such forward-looking statements. These statements are based on assumptions and analyses made by the Company as of this date in light of its experience and its perception of historical trends, current conditions and expected future developments, as well as other factors that the Company currently believes are appropriate under the circumstances. However, whether actual results and developments will meet the current expectations and predictions of the Company is uncertain. Actual results, performance and financial condition may differ materially from the Company's expectations, including but not limited to those associated with macro-political and economic factors, fluctuations in crude oil and natural gas prices, the highly competitive nature of the oil and natural gas industry, climate change and environmental policies, the Company's price forecast, mergers, acquisitions and divestments activities, HSSE and insurance policies and changes in anti-corruption, anti-fraud, anti-money laundering and corporate governance laws and regulations. Consequently, all of the forward-looking statements made in this press release are qualified by these cautionary statements. The Company cannot assure that the results or developments anticipated will be realised or, even if substantially realised, that they will have the expected effect on the Company, its business or operations. *** *** *** *** For further enquiries, please contact: Ms. Cui Liu Media &amp; Public Relations CNOOC Limited Tel: +86-10-8452-6641 Fax: +86-10-8452-1441 E-mail: mr@cnooc.com.cn Mr. Cheng Yao Ever Bloom (HK) Communications Consultants Group Limited Tel：+852 5540 0725 Fax：+852 2111 1103 Email: cnooc.hk.list@everbloom.com.cn <img src="https://imageproxy.pbkrs.com/https://edge.prnewswire.com/c/img/favicon.png/query-c2Q9MjAyNi0wMS0wMiZzbj1DTjU1NTU3?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg" width="16" height="16" original-src="https://imageproxy.pbkrs.com/https://edge.prnewswire.com/c/img/favicon.png/query-c2Q9MjAyNi0wMS0wMiZzbj1DTjU1NTU3"/> View original content to download multimedia:https://www.prnewswire.com/news-releases/cnooc-limited-announces-buzios6-project-commences-production-302651972.html SOURCE CNOOC Limited </div></div>

00883

600938

CNOOC Limited has announced the commencement of production for the Buzios6 Project, located in Brazil's Santos Basin. This project is part of the world's largest deep-water pre-salt oilfield and will enhance the oilfield's production capacity to 1.15 million barrels per day. The Buzios6 project includes 13 development wells and utilizes an FPSO with a production capacity of 180,000 barrels of crude oil per day. CNOOC holds a 7.34% interest in the Buzios Shared Reservoir, with Petrobras as the operator.

CNOOC Limited Announces Buzios6 Project Commences Production