The U.S. shale boom will send "shockwaves" through the global oil trade over the next five years, benefiting the nation's refiners and displacing OPEC as the driver of supply growth, the IEA said.

North America will provide 40 percent of new supplies to 2018 through the development of light, tight oil and oil sands, while the contribution from the Organization of Petroleum Exporting Countries will slip to 30 percent, according to the International Energy Agency. The IEA trimmed global fuel demand estimates for the next four years, and predicted that consumption in emerging economies may overtake developed nations this year.

"The supply shock created by a surge in North American oil production will be as transformative to the market over the next five years as was the rise of Chinese demand over the last 15," the Paris-based adviser to 28 oil-consuming nations said in its medium-term market report today.