The End of Oil
Despite years of hyping up the volume of their reserves, Saudi officials are now warning that they will not be able to pump enough to keep pace with the growing energy demands of the globe; via the Financial Times:

But private warnings also point to a worsening long-term outllook, with Saudi officials saying that the Organisation of the Petroleum Exporting Countries will be unable to meet projected western demand in 10 to 15 years. At today's prices, the world will need the cartel to boost its production from 30m to 50m barrels a day to 50m by 2020 to meet rapidly rising demand, according to the International Energy Agency, the energy watchdog for consuming countries. But senior Saudi energy officials have privately warned US and European counterparts that Opec would have an “extremely difficult time” meeting that demand. Saudi Arabia calculates there is a 4.5m b/d gap between what the world needs and what the kingdom can provide. Saudi Arabia has the world's largest oil reserves and will need to bear up to half Opec's production growth in the next 10 to 20 years, with the rest mainly coming from Kuwait and the United Arab Emirates.