CNOOC Limited Begins Trading on TSX

HONG KONG, Sept. 18, 2013 /CNW/ - CNOOC Limited (the "Company", NYSE: CEO, 
SEHK: 00883) announced that the Toronto Stock Exchange (TSX) has approved the 
listing of the Company's American Depositary Receipts (ADRs) on the TSX at the 
opening of the market today. The Company's listing symbol is CNU. 
Mr. Wang Yilin, Chairman of the Company commented, "Trading on the TSX isn't 
just about broadening our shareholder base. It also provides investors with 
more choices in terms of exchange venues and currencies. We strive to 
demonstrate how CNOOC Limited works to create great value to our shareholders 
and stakeholders." 
Mr. Li Fanrong, CEO of the Company commented, "Canada became an important 
investment destination for CNOOC Limited following our acquisition of Nexen. 
Listing on the TSX represents our continuous commitment to maintaining 
transparency and good corporate governance in the countries where we operate." 
CNOOC Limited trades common shares on the Hong Kong Stock Exchange (code: 
00883). On the New York Stock Exchange (NYSE), the ADRs are traded under the 
symbol CEO. ADRs are commonly used by foreign public issuers to enable trading 
of securities in the United States. The ADRs listed on the TSX are the same 
instruments as those listed on the NYSE, but are denominated in Canadian 
rather than U.S. dollars. One CNOOC Limited ADR is the equivalent of 100 
common shares of CNOOC Limited. 
Advisory Regarding Reserves Data and Other Oil and Gas Information 
CNOOC Limited also wishes to advise that pursuant to a decision (the 
"Decision") of the Alberta and Ontario securities regulatory authorities, the 
Company has been granted exemptive relief from the disclosure requirements 
contained in National Instrument 51-101 - Standards of Disclosure for Oil and 
Gas Activities ("NI 51-101"), including the obligation to file Form 51-101F1 
Statement of Reserves Data and Other Oil and Gas Information, Form 51-101F2 
Report on Reserves Data by Independent Qualified Reserves Evaluator or Auditor 
and Form 51-101F3 Report of Management and Directors on Oil and Gas 
Disclosure. In lieu of such filings, the Decision permits CNOOC Limited to 
provide disclosure with respect to its oil and gas activities in accordance 
with the disclosure requirements applicable to CNOOC Limited imposed by the 
United States Securities Exchange Commission (the "SEC"), the United States 
Securities Exchange Act of 1933, the United States Securities Exchange Act of 
1934, the United States Sarbanes-Oxley Act of 2002 and the rules of the New 
York Stock Exchange (collectively, the "U.S. Rules"). 
Readers should be aware that CNOOC Limited's future disclosure relating to its 
oil and gas activities will comply with the U.S. Rules rather than NI 51-101 
and the Canadian Oil and Gas Evaluation Handbook. The U.S. Rules differ in a 
number of respects from the disclosure otherwise required under NI 51-101 and 
the Canadian Oil and Gas Evaluation Handbook and readers are urged to consider 
these differences when considering all future disclosures made by CNOOC 
Limited relating to its oil and gas activities. 
Notes to Editors: 
More information about the Company is available at 
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 "expect", "anticipate", "continue", "estimate", 
"objective", "ongoing", "may", "will", "project", "should", "believe", 
"plans", "intends" and similar expressions are intended to identify such 
forward-looking statements. These statements are based on assumptions and 
analysis made by the Company in light of its experience and perception of 
historical trends, current conditions and expected future developments, as 
well as other factors that the Company believes reasonable under the 
circumstances. However, whether actual results and developments will meet the 
Company's expectations and predictions depends on a number of risks and 
uncertainties which could cause the actual results, performance and financial 
conditions to differ materially from the Company's expectations, including 
those associated with fluctuations in crude oil and natural gas prices, the 
exploration or development activities, the capital expenditure requirements, 
the business strategy, whether the transactions entered into by the Company 
can complete on schedule pursuant to its timetable or at all, the highly 
competitive nature of the oil and natural gas industries, the foreign 
operations, environmental liabilities and compliance requirements, and 
economic and political conditions in the People's Republic of China. For a 
description of these and other risks and uncertainties, please see the 
documents the Company has filed from time to time with the United States 
Securities and Exchange Commission, including 2012 Annual Report on Form 20-F 
filed on April 24, 2013. 
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 realized or, even if 
substantially realized, that they will have the expected effect on the 
Company, its business or operations.

SOURCE  Nexen Inc. 
For further enquiries, please contact: 
Ms. Michelle Zhang Deputy Manager, Media / Public Relations CNOOC Limited Tel: 
+86-10-8452-6642 Fax: +86-10-8452-1441 
Ms. Angela Hui Ketchum Newscan Public Relations Ltd Tel: +852-3141-8091 Fax: 
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CO: CNOOC Limited
-0- Sep/18/2013 16:05 GMT
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