1. Saudi Arabia 10.72 millions of barrels per day of oil production

Of the largest 21 fields, at least 9 are in decline.[82] In April, 2006, a Saudi Aramco spokesman admitted that its mature fields are now declining at a rate of 8% per year (with a national composite decline of about 2%). This information has been used to argue that Ghawar, which is the largest oil field in the world and responsible for approximately half of Saudi Arabia's oil production over the last 50 years, has peaked. The world's second largest oil field, the Burgan field in Kuwait, entered decline in November 2005.

According to a study of the largest 811 oilfields conducted in early 2008 by Cambridge Energy Research Associates (CERA), the average rate of field decline is 4.5% per year. The IEA stated in November 2008 that an analysis of 800 oilfields showed the decline in oil production to be 6.7% a year, and that this would grow to 8.6% in 2030.[86] There are also projects expected to begin production within the next decade that are hoped to offset these declines. The CERA re ...more

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