UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934

For the month of August, 2007

Commission File Number 1-14966
 
CNOOC Limited
(Translation of registrant’s name into English)
   
65th Floor
Bank of China Tower
One Garden Road
Central, Hong Kong
(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  X        Form 40-F ___

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ____

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ____

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ___      No X

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): Not applicable



Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


 
CNOOC Limited
   
   
                                                                          By:    
/s/ Kang Xin
                                                                     Name:    
Kang Xin
                                                                       Title:    
Company Secretary
Dated: August 10, 2007
  



EXHIBIT INDEX
                        
Exhibit No.   Description
   
99.1 Press release dated August 9, 2007, entitled “CNOOC Ltd. Fully Supports Hong Kong Visit of China Deep-sea Research Vessel 'Dayang Yihao'”.
   
 
                                    
 

Exhibit 99.1

 
FOR IMMEDIATE RELEASE

CNOOC Ltd. Fully Supports Hong Kong Visit of
 
China Deep-sea Research Vessel “Dayang Yihao”
 
(Hong Kong, 9 August 2007) A three-day visit of Dayang Yihao, China’s state-of-art research vessel, solely sponsored by CNOOC Limited (NYSE: CEO, SEHK: 883, "the Company") will kick off tomorrow.

 
Dayang Yihao is the only deep-sea research vessel in China, and also one of the world’s most advanced research vessels. Equipped with world-class facilities and a team of top marine scientists, Dayang Yihao is designated to carry out scientific research at water depth of over a few thousand meters. At the invitation of Hong Kong University of Science and Technology and with the full support of CNOOC Ltd, Dayang Yihao has arrived in Hong Kong and will be open for public visit from 10 to 12 August 2007.
 

“As we celebrate the 10th anniversary of Hong Kong’s return to China, CNOOC Ltd. is very proud to participate in this significant event as Title Sponsor. We always believe fulfilling our corporate social responsibility and developing in tandem with the community is very important for our long-term growth. We also hope that this event will provide an opportunity for us to work closely with members of the education, science and technology arenas, so that we can gain better support from society in our exploration of the undersea world,” commented Mr. Fu Chengyu, Chairman and Chief Executive Officer of the Company.

-End-

Notes to Editors:
 
 
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More information about the Company is available at http://www.cnoocltd.com.

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This press release contains statements that are not historical facts, including statements about beliefs and expectations of the directors of the Company on the Company and its development and future plans. These forward-looking statements reflect the directors’ current views with respect to future events and are not a guarantee of future performance, and therefore shareholders and potential investors should not place undue reliance on them.  The directors of the Company undertake no obligation to update or revise publicly any of these forward-looking statements, whether in light of new information, future events or otherwise.  Forward-looking statements involve inherent risks and uncertainties.  Shareholders and potential investors are cautioned that a number of factors could cause actual results to differ materially from those contained in any forward-looking statement.  Such factors include, but are not limited to, changes in the Chinese economic, political and social conditions and government policies and in the oil and gas industry.

*** *** *** ***
For further enquiries, please contact:

Mr. Xiao Zongwei
General Manager of Investor Relations
CNOOC Limited
Tel: +86-10-8452-1646
Fax: +86-10-8452-1441
E-mail: xiaozw@cnooc.com.cn

Ms. Carol Wong
Account Manager
Ketchum Hong Kong
Tel: +852-3141-8098
Fax: +852-2510-8199
E-mail: carol.wong@knprhk.com
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