The U.S. endowment of unconventional oil is more than 2 trillion barrels, with another 2.4 trillion in Canada and 2 trillion-plus in South America -- compared with conventional Middle Eastern and North African oil resources of 1.2 trillion. The problem was always how to unlock them economically.
But since the early 2000s, the energy industry has largely solved that problem. With the help of horizontal drilling and other innovations, shale gas production in the United States has skyrocketed from virtually nothing to 15 to 20 percent of the U.S. natural gas supply in less than a decade. By 2040, it could account for more than half of it. This tremendous change in volume has turned the conversation in the U.S. natural gas industry on its head; where Americans once fretted about meeting the country's natural gas needs, they now worry about finding potential buyers for the country's surplus.
Meanwhile, onshore oil production in the United States, condemned to predictions of inexorable decline by analysts for two decades, is about to stage an unexpected comeback. Oil production from shale rock, a technically complex process of squeezing hydrocarbons from sedimentary deposits, is just beginning.
The revolution-swept Middle East and North Africa, meanwhile, will soon be facing up to an inconvenient truth about their own fossil-fuel legacy: Changes of government in the region have historically led to long and steep declines in oil production. Libya's oil output has never recovered to the 3.5 million barrels a day it was producing when Col. Muammar al-Qaddafi overthrew King Idris in 1969; instead it has been stuck at under 2 million barrels a day for three decades and is now close to zero. Iran produced more than 6 million barrels a day in the times of the shah, but saw oil production fall precipitously below 2 million barrels a day in the aftermath of the 1979 Islamic Revolution. It failed to recover significantly during the 1980s and has only crept back to 4 million in recent years. Iraq's production has also suffered during its many years of turmoil and now sits at 2.7 million barrels a day, lower than the 3.5 million it produced before Saddam Hussein came to power.
The Arab Spring stands to complicate matters even further: A 1979-style disruption in Middle Eastern oil exports is hardly out of the question, nor are work stoppages or strikes by oil workers caught up in the region's political zeitgeist.