Suizhong 36-1 Phase II Adjustment Project Starts Production

         Suizhong 36-1 Phase II Adjustment Project Starts Production

  PR Newswire

  HONG KONG, October 30, 2013

HONG KONG, October 30, 2013 /PRNewswire/ --

CNOOC Limited (the "Company", NYSE: CEO, SEHK: 00883, TSX: CNU) announced
today that Suizhong 36-1 Phase II adjustment project has commenced production.

Suizhong 36-1 oil field is located in the south region of Liaodong Bay in
Bohai with an average water depth of about 30 meters. Along with fully
utilizing the existing producing facilities, this adjustment project also
built 4 new platforms. The commencement of this project will further enhance
the overall processing capability of the field and make the development of
this field more effectively. The adjustment project was expected to hit its
peak production in 2014.

Suizhong 36-1 oil field is an independent oil field in which the Company holds
100% interest and acts as the Operator.

Notes to Editors:

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

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 Group 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 19, 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.

For further information: Ms. Michelle Zhang Deputy Manager, Media / Public
Relations CNOOC Limited Tel: +86-10-8452-6642 Fax: +86-10-8452-1441 E-mail:
MR@cnooc.com.cn

Ms. Angela Hui Ketchum Newscan Public Relations Ltd Tel: +852-3141-8091 Fax:
+852-2510-8199 E-mail: angela.hui@knprhk.com

(CEO CNU.)