"WHEN activists, journalists and others speak of “Big Oil”, you know exactly what they mean: companies such as Exxon Mobil, Chevron, BP and Royal Dutch Shell. These titans have been making lots of money for their shareholders; their bosses enjoy vast pay packets; and their actions affect us all. BP's decision to shut down Prudhoe Bay, America's biggest oilfield, to repair leaking pipes is a case in point, outraging many and pushing petrol prices even higher (see article).
Yet Big Oil is pretty small next to the industry's true giants: the national oil companies (NOCs) owned or controlled by the governments of oil-rich countries, which manage over 90% of the world's oil, depending on how you count. Of the 20 biggest oil firms, in terms of reserves of oil and gas, 16 are NOCs. Saudi Aramco, the biggest, has more than ten times the reserves that Exxon does. Those with misgivings about oil—that its price is too high, that reserves are running out, that it damages the environment, that it is more a curse than an asset for countries that produce it—must look to NOCs for reassurance.
These companies are certainly sitting on a reassuring amount of oil. Saudi Aramco's proved reserves alone could keep the world supplied for several decades. But it is only exploiting ten of its 80 or so fields, so will be able to pump at the present rate for about 70 years even if it never discovers another drop of oil. In fact, Aramco and other NOCs are likely to find plenty more if they look, since their territory has not been very thoroughly explored. Only 2,000 wildcat wells have ever been dug in the countries around the Gulf, according to Leonardo Maugeri, an Italian oilman, compared with more than 1m wells in the United States."
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