6-K

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 November 2020

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/ Xiaonan Wu
Name:	Xiaonan Wu
Title:	Joint Company Secretary

Date: November 30, 2020

EXHIBIT INDEX

Exhibit No.	Description
99.1	Voluntary Announcement

EX-99.1

Exhibit 99.1

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

(Incorporated in Hong Kong with limited liability under the Companies Ordinance)

(Stock Code: 00883)

VOLUNTARY ANNOUNCEMENT

This announcement is made by CNOOC Limited (the “Company”) on a voluntary basis.

The Company noted a news report by Reuters on 30 November 2020 that relevant U.S. government agency might add China National Offshore Oil Corporation (中國海洋石油集團有限公司) (“CNOOC”), the controlling shareholder of the Company, to a blacklist of companies with alleged ties to the Chinese military. The Company has inquired with CNOOC and understands that CNOOC has not yet received any official notice or decision from relevant U.S. government agency.

The Company is closely monitoring the development of the situation. The Company may make further announcements if and when appropriate.

By Order of the Board

CNOOC Limited

Wu Xiaonan

Joint Company Secretary

Hong Kong, 30 November 2020

As at the date of this announcement, the Board comprises:	Non-executive Directors Wang Dongjin (Chairman) Li Yong (Vice Chairman) Wen Dongfen
Executive Directors Xu Keqiang Hu Guangjie	Independent Non-executive Directors Chiu Sung Hong Lawrence J. Lau Tse Hau Yin, Aloysius Qiu Zhi Zhong