Beale said the projection is a long term average and that higher demand in some years could mean increased pressure on prices, like in 2015-2016, when a large number of coal-powered plants will shut down.
"There will be more gas in the power grid, and we'll have more chemical plants coming on line," she said in an interview. "We do think we'll have prices rising gently, not spike."
She also does not expect U.S. gas prices to rise to prices elsewhere in the world, once the U.S. begins exporting gas, expected to begin in 2019. Prices in Asia and elsewhere can be in double digits, and they are linked to oil prices.
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The study says that challenges to natural gas use include conversion costs and regulations that can discourage economical natural gas projects.