China Oil and Gas Giant CNOOC Ltd Had 62.5% of Its Net Proved Reserves of Oil and Natural Gas in Offshore China and the Other 37.5% Overseas Including in Canada and in the US ...................................................................................... Of the 2016 Undeveloped Net Proved Reserved, 8% Were in Canada and Another 10% in North America Excluding Canada ...................................................................................... Of the 2016 Developed Net Proved Reserved, 9% Were in Canada and Another 7% in North America Excluding Canada ...................................................................................... At Dec 31, 2016, 40% of CNOOC's Property, Plant and Equipment (PPE) was Located in China, With 24% in Canada and With Another 36% Located in Other Countries, Probably Much of it in the US

From CNOOC Ltd's US SEC filings