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 October 2019

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: October 11, 2019

EXHIBIT INDEX

Exhibit No.	Description
99.1	Announcement Regarding Completion of the Acquisition of 100% Equity Interest in Cucbm

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)

ANNOUNCEMENT 

REGARDING COMPLETION OF THE ACQUISITION OF 100% EQUITY INTEREST IN CUCBM

Reference is made to the announcement of CNOOC Limited (the “Company”) dated 1 August 2019 (the “Announcement”) in relation to the Acquisition by CNOOC China, a wholly-owned subsidiary of the Company, of the 100% equity interest in CUCBM pursuant to the Equity Transfer Agreement. Unless the context requires otherwise, capitalised terms used herein shall have the same meanings as those defined in the Announcement.

The Board is pleased to announce that the Completion took place on 11 October 2019 in accordance with relevant provisions under the Equity Transfer Agreement. Upon the registration of the change in equity interest, CUCBM will become an indirect wholly-owned subsidiary of the Company.

By Order of the Board
CNOOC Limited
Wu Xiaonan
Joint Company Secretary

Hong Kong, 11 October 2019

As at the date of this announcement, the Board comprises:

Executive Director	Independent Non-executive Directors
Xu Keqiang	Chiu Sung Hong  Lawrence J. Lau  Tse Hau Yin, Aloysius  Qiu Zhi Zhong
Non-executive Director
Wang Dongjin (Vice Chairman)