CNOOC Limited and BEH Jointly Made Capital Contributions in Bridas to Increase its Stake in PAE

HONG KONG, Nov. 28, 2010 /Xinhua-PRNewswire/ -- CNOOC Limited (the "Company", NYSE: CEO, SEHK: 0883) announced that Bridas Corporation ("Bridas"), a 50/50% joint venture between CNOOC International Limited ("CNOOC International") and Bridas Energy Holdings ("BEH"), entered into a share purchase agreement with BP PLC("BP") on 28 November 2010, pursuant to which Bridas will acquire 60% equity interest in Pan American Energy("PAE") from BP for a consideration of around USD7.06 billion. The acquisition excludes PAE's assets in Bolivia.

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CNOOC International, a wholly owned subsidiary of the Company, and BEH have agreed to contribute an aggregate amount of about USD4.94 billion to Bridas, to finance 70% of the consideration of the proposed acquisition. The contribution will be made in equal amounts, i.e. approximately USD2.47 billion, by each of CNOOC International and BEH.

The remaining 30% of the consideration, or approximately USD2.12 billion, will be satisfied by third party loans to be arranged by Bridas and/or additional contributions from CNOOC International and BEH.

Completion of the acquisition is conditional on, amongst others, all necessary government and regulatory approvals, and is expected to take place in the first half of 2011.

PAE has oil and gas exploration and production activities mainly in Argentina of South America. Currently, Bridas owns its 40% of interest, and BP owns the remaining 60%. In the last decade, PAE has established itself as the second-largest oil and natural gas producer in Argentina. PAE is also one of the few companies in Argentina to have consistently increased its oil and gas production in recent years.

Based on relevant 2009 statistics and on a proportionate basis, it is expected that, upon completion of the acquisition, the proven reserves and average daily production of the Company will be increased by 429 million barrels of oil equivalent ("BOE") and 68 thousand BOE respectively.

Chairman of the Company, Mr. Fu Chengyu commented, "We are pleased to strengthen our partnership with BEH, one of the foremost companies in Argentina. The acquisition by Bridas will facilitate the future development of PAE, and in turn, will create more value to both CNOOC Limited and BEH."

Mr. Yang Hua, the Vice chairman and CEO of CNOOC Limited said: "I believe, after the transaction and with the world-class oil and gas asset portfolio and existing excellent management team of PAE, we'll be able to enhance our presence in the region, which will benefit us in the short term and long run."

In the first half of 2010, CNOOC International and BEH have completed the formation of a 50/50% joint venture in Bridas.

This press release includes "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995, including statements regarding expected future events, business prospectus or financial results. The words "believe", "intend", "expect", "anticipate", "project", "estimate", "plan", "predict" and similar expressions are intended to identify such forward-looking statements. These statements are based on assumptions and analyses made by us that we believe are reasonable under the circumstances. However, whether actual results and developments will meet our expectations and predictions depend on a number of risks and uncertainties which could cause our actual results, performance and financial condition to differ materially from our expectations. For a description of these and other risks and uncertainties, please see the documents we file from time to time with the United States Securities and Exchange Commission, including our 2009 Annual Report on Form 20-F filed on April 23, 2010.

For further enquiries, please contact: Mr. Jiang Yongzhi Joint Company Secretary and General Manager of Investor Relations Department CNOOC Limited Tel: [phone] Fax: [phone] E-mail: [e-mail] Ms. Sharon Fung Ketchum Newscan Public Relations Ltd Tel: [phone] Fax: [phone] E-mail: [e-mail]

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CNOOC Limited

CONTACT: Mr. Jiang Yongzhi, Joint Company Secretary and General Manager
of Investor Relations Department, CNOOC Limited, Tel: [phone], Fax:
[phone], [e-mail]; or Ms. Sharon Fung, Ketchum Newscan
Public Relations Ltd, Tel: [phone], Fax: [phone],
[e-mail]

Web Site: http://www.cnoocltd.com/