US seen overtaking Saudis as biggest oil producer

In its World Energy Outlook, the energy watchdog also predicted that greater oil and natural gas production — thanks partly to a boom in shale gas output — as well as more efficient use of energy will allow the U.S., which now imports some 20 percent of its energy needs, to become nearly self-sufficient around 2035.

That is "a dramatic reversal of the trend seen in most other energy-importing countries," the Paris-based IEA said in its report. "Energy developments in the United States are profound and their effect will be felt well beyond North America — and the energy sector."

Rebounding U.S. oil and gas production is "steadily changing the role of North America in global energy trade," the IEA said.

For example, oil exports out of the Mideast will increasingly go to Asia as the U.S. becomes more self-sufficient. That will increase the global focus on the security of strategic routes that bring Middle East oil to Asian markets. Tensions between Iran and Western powers have raised concerns that oil exports from the Persian Gulf could be blocked in a potential conflict over Tehran's alleged plan to develop nuclear weapons.