CEO [CNOOC] 424B2: (Original Filing)
[PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED APRIL 22, 2014 CNOOC NEXEN FINANCE (2014) ULC (incorporated in Canada) US$1,250,000,000 1.625% Guaranteed Notes due 2017 US$2,250,000,000 4.250% Guaranteed Notes due 2024 US$500,000,000 4.875% Guaranteed Notes due 2044 unconditionally and irrevocably guaranteed by CNOOC Limited (incorporated with limited liability in Hong Kong) The 2017 Notes will bear interest from April 30, 2014 at the]