World energy consumption will rise 56 percent in the next three decades, driven by growth in developing countries such as China and India, the Energy Information Administration said.

Demand will increase to 820 quadrillion British thermal units in 2040 from 524 quadrillion in 2010, the EIA said in the International Energy Outlook 2013, with the two Asian countries accounting for half the gain. One quadrillion Btu is equal to 172 million barrels of crude oil. China’s energy consumption will double the U.S. level by 2040.

“Rising prosperity in China and India is a major factor in the outlook for global energy demand,” EIA Administrator Adam Sieminski said in a news release. “This will have a profound effect on the development of world energy markets.”

Demand in countries outside the Organization for Economic Cooperation and Development will increase by 90 percent through 2040. Use by OECD members, including the U.S. and Japan, will grow 17 percent.

Use of petroleum and other liquid fuels will grow to 115 million barrels a day in 2040 from 87 million in 2010. Liquid fuels will account for 28 percent of demand in 2040, down from 34 percent in 2010.

Brent Prices

Brent crude will average $106 a barrel in 2020 and $163 in 2040, valued in 2011 dollars. Brent, a gauge for more than half the world’s oil, averaged $107.83 this year through yesterday.

Brent for September settlement slid 40 cents, or 0.4 percent, to $106.79 a barrel at 10:25 a.m. New York time on the London-based ICE Futures Europe exchange. West Texas Intermediate, the U.S. benchmark, fell $1.10, or 1 percent, to $104.29 on the New York Mercantile Exchange.

U.S. oil production climbed to 7.56 million barrels a day in the week ended July 19, the most since December 1990, the EIA said yesterday in a weekly report.

A combination of horizontal drilling and hydraulic fracturing, or fracking, has unlocked supplies in shale formations in North Dakota, Texas and other states. Rising output helped the U.S. meet 89 percent of its energy needs in March, the highest rate since April 1986, EIA data show.

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