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Despite the ability of new technologies to open up oil sources in the United States, the world's five most important oil fields are all decades-old reserves in the Middle East, according to an analysis from Oilprice.com.
In brief, the fields are Ghawar and Safaniya in Saudi Arabia, Rumaila and West Qurna-2 in Iraq, and Burgan in Kuwait. The largest oil field, Ghawar, produces 5 million barrels a day.
In addition to Chinese companies and the Russian firm Lukoil, U.S. companies Exxon Mobil and BP have a stake in some of the fields.
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Read the full analysis on Oilprice.com here.