Ticker: CEO, Company: CNOOC LTD, Type: 20-F, Date: 2018-04-19, XBRL Interactive Financials
Original SEC Filing: Click here

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Webplus: CEO/20180419/20-F/1/000.htm SEC Original: dp89178_20f.htm
(Title of Class) Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report. Shares 44,647,455,984 ý ¨ Yes ¨ ý Yes ý ¨ Yes ¨ ý Yes ý ¨ ¨ Large accelerated filer

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Webplus: CEO/20180419/20-F/2_EX-8.1/000.htm SEC Original: dp89178_ex0801.htm
Subsidiaries As of December 31, 2017, we owned, directly or indirectly, the following subsidiaries. Name of entity Our interest Jurisdiction of incorporation CNOOC China Limited 100% Tianjin, PRC CNOOC International Limited 100% British Virgin Islands China Offshore Oil (Singapore) International Pte Ltd 100% Singapore CNOOC Finance (2003) Limited 100% British Virgin Islands Malacca Petroleum Limited 100% Bermuda OOGC America LLC

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Webplus: CEO/20180419/20-F/3_EX-11.1/000.htm SEC Original: dp89178_ex1101.htm
CNOOC Limited (incorporated under the laws of Hong Kong with limited liability) Code of Ethics for Directors and Senior Officers 24 August 2017 I. II. COMPLIANCE WITH LAWS, RULES AND REGULATIONS 1 III. The directors and Senior Officers who have access to, or knowledge of, material non-public information from or about our company are prohibited from buying, selling or otherwise

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Webplus: CEO/20180419/20-F/4_EX-12.1/000.htm SEC Original: dp89178_ex1201.htm
CERTIFICATIONS I, Guangyu Yuan, certify that: 1. I have reviewed this annual report on Form 20-F of CNOOC Limited; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

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Webplus: CEO/20180419/20-F/5_EX-12.2/000.htm SEC Original: dp89178_ex1202.htm
CERTIFICATIONS I, Weizhi Xie, certify that: 1, I have reviewed this annual report on Form 20-F of CNOOC Limited 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

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Webplus: CEO/20180419/20-F/6_EX-13.1/000.htm SEC Original: dp89178_ex1301.htm
CERTIFICATIONS Guangyu Yuan, the Chief Executive Officer and Weizhi Xie, the Chief Financial Officer of CNOOC Limited, each certifies that, to the best of his knowledge: 1. the Report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and 2. the information contained in the Report fairly presents, in all material respects, the financial condition

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Webplus: CEO/20180419/20-F/7_EX-15.1/000.htm SEC Original: dp89178_ex1501.htm
CNOOC LIMITED Estimated Future Reserves and Income Attributable to Certain Leasehold Interests and Derived Through Certain Production Sharing Contracts SEC Parameters As of December 31, 2017 Eric T. Nelson, P.E. TBPE License No. 102286 Managing Senior Vice President [SEAL] RYDER SCOTT COMPANY, L.P. TBPE Firm Registration No. F-1580 RYDER SCOTT COMPANY PETROLEUM CONSULTANTS TBPE REGISTERED ENGINEERING FIRM F-1580 FAX (713)

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Webplus: CEO/20180419/20-F/8_EX-15.2/000.htm SEC Original: dp89178_ex1502.htm
Independent Letter The Missan Oil Fields In Eastern Iraq Prepared for CNOOC Limited As of 31 December 2017 March 2018 This summary letter is based on Gaffney, Cline & Associates’ official report and has been provided at the request of CNOOC Limited. www.gaffney-cline.com Gaffney, Cline & Associates (Consultants) Pte. Ltd. 80 Anson Road #31-01C Fuji Xerox Towers Singapore 079907 Telephone:

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Webplus: CEO/20180419/20-F/9_EX-15.3/000.htm SEC Original: dp89178_ex1503.htm
20405 Tomball Parkway, Building 2, Suite 200, Houston, Texas 77070, USA T F W January 31, 2018 CNOOC Limited No. 25, Chaoyangmenbei Dajie Dongcheng District Beijing 100010, P.R. China Gentlemen: CNOOC Limited holds 50% interest in Bridas Corporation and Bridas Corporation holds 50% interests in PAE. Therefore CNOOC Limited, through Bridas Corporation, owns 25% of participating interests in PAE. The

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Webplus: CEO/20180419/20-F/10_EX-15.4/000.htm SEC Original: dp89178_ex1504.htm
TBPE REGISTERED ENGINEERING FIRM F-1580 FAX (713) 651-0849 1100 LOUISIANA SUITE 4600 HOUSTON, TEXAS 77002-5294 TELEPHONE (713) 651-9191 January 16, 2018 CNOOC Limited c/o Nexen Energy ULC 801-7th Avenue S.W. Calgary, Alberta T2P 3P7 Canada Gentlemen: The properties reviewed by Ryder Scott account for all of OOGC’s total net proved reserves as of December 31, 2017. CNOOC has represented that

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Webplus: CEO/20180419/20-F/11_EX-15.5/000.htm SEC Original: dp89178_ex1505.htm
January 18, 2018 CNOOC Limited c/o Nexen Energy ULC th 801 – 7 Calgary, Alberta T2P 3P7 Re: Gentlemen: Reserves included herein are expressed as reserves as represented by CNOOC. Gross reserves are defined as the total estimated petroleum to be produced from these properties after December 31, 2017. Working interest reserves are defined as that portion of the gross

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Webplus: CEO/20180419/20-F/12_EX-15.6/000.htm SEC Original: dp89178_ex1506.htm
DeGolyer and MacNaughton 5001 Spring Valley Road Suite 800 East Dallas, Texas 75244 This is a digital representation of a DeGolyer and MacNaughton report. This file is intended to be a manifestation of certain data in the subject report and as such are subject to the same conditions thereof. The information and data contained in this file may be subject

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Webplus: CEO/20180419/20-F/13_EX-15.8/000.htm SEC Original: dp89178_ex1508.htm
TBPE REGISTERED ENGINEERING FIRM F-1580 FAX (713) 651-0849 1100 LOUISIANA SUITE 4600 HOUSTON, TEXAS 77002-5294 TELEPHONE (713) 651-9191 Consent of Independent Consultant RYDER SCOTT COMPANY, L.P. TBPE Firm Registration No. F-1580 Houston, Texas April 6, 2018 SUITE 600, 1015 4TH STREET, S.W. CALGARY, ALBERTA T2R 1J4 TEL (403) 262-2799 FAX (403) 262-2790 621 17TH STREET, SUITE 1550 DENVER, COLORADO 80293-1501

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Webplus: CEO/20180419/20-F/14_EX-15.9/000.htm SEC Original: dp89178_ex1509.htm
4 April 2018 China National Offshore Oil Corporation Limited No. 25, Chaoyangmenbei Daijie Dongcheng District Beijing 100010, P.R. China Dear Sir, Consent of Gaffney, Cline & Associates “Independent Letter –The Missan Oil Fields In Eastern Iraq Estimated Proved Reserves and Financial Data, Based on SEC Rules as of 31 December 2017” “Independent Letter –The Greater Angostura Fields Block 2C, Trinidad

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Webplus: CEO/20180419/20-F/15_EX-15.10/000.htm SEC Original: dp89178_ex1510.htm
20405 Tomball Parkway, Building Two, Suite 200, Houston, Texas 77070 T W RPS Consent of Independent Consultant RPS Houston, Texas March 21, 2018 United Kingdom I USA I Canada I Australia I Malaysia I Ireland I Netherlands I Singapore I Russia I Brazil I Africa

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Webplus: CEO/20180419/20-F/16_EX-15.11/000.htm SEC Original: dp89178_ex1511.htm
Consent of Independent Consultant McDANIEL & ASSOCIATES CONSULTANTS LTD. McDaniel & Associates Consultants Ltd. 2200, Bow Valley Square 3, 255 – 5 Avenue S.W. Calgary, Alberta, T2P 3G6 Canada April 9, 2018 2200, Bow Valley Square 3, 255 – 5 Avenue SW, Calgary AB T2P 3G6 Tel: (403) 262-5506 Fax: (403) 233-2744 www.mcdan.com

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Webplus: CEO/20180419/20-F/17_EX-15.12/000.htm SEC Original: dp89178_ex1512.htm
DeGolyer and MacNaughton 5001 Spring Valley Road Suite 800 East Dallas, Texas 75244 Consent of DeGolyer and MacNaughton Very truly yours, DeGOLYER and MacNAUGHTON Texas Registered Engineering Firm F-716 Dallas, Texas April 9, 2018

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Company Info:

Ticker: CEO, Company: CNOOC LTD, Type: 20-F, Date: 2018-04-19, XBRL Interactive FinancialsCIK: 0001095595, Location: F4, SIC: 1311, SIC Desc: CRUDE PETROLEUM & NATURAL GAS
Business Phone & Address:
65TH FLOOR BANK OF CHINA TOWER, 1 GARDEN RD
HONG KONG