The Hubbert peak theory basically points out that for any given geographical area, from an individual oil-producing region, the rate of petroleum production tends to follow a certain Logistic distribution, a ‘bell-shaped curve’. The theory describes that the amount of oil under the ground in any region is limited; as a result the rate of discovery which initially increases quickly must reach a maximum and decline. In the US, oil extraction followed the discovery curve after a time lag of 32 to 35 years.
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