ABU DHABI — Relentless American shale development is set to allow the U.S. to leapfrog the world’s other major oil and gas producers, with the potential for the country to account for roughly half of global crude and natural growth by 2025, the International Energy Agency said Tuesday.

In its annual World Energy Outlook report, the IEA said its main projection scenario through to 2040 foresees the U.S. accounting for nearly 75% and 40% of global oil and gas growth, respectively, over the next six years. Growth is expected to be driven primarily by shale fracking, which should lead U.S. shale oil supply to more than double, reaching 9.2 million barrels a day by the mid-2020s, the agency said.