22 Aug '11, 4pm

Shale gas has an Energy Return on Investment estimated at between 70 and 100

Shale gas has an Energy Return on Investment estimated at between 70 and 100

This estimate is based on my interpretations of analyses by the Environmental Defense Fund[11] and the New York Department of Environmental Conservation (NYDEC)[12] which focused on the carbon dioxide (CO2) emissions from shale gas drilling and compressing operations. CO2 emissions are directly related to fossil fuel combustion, so these studies in effect provide estimates of the energy used to extract shale gas and get it to market. Other studies provide estimates of the ultimate production of gas from an average well[13] and on the portion of the gas that must be used to process and compress it and send it through pipelines.[14] Also included were approximate estimates of the energy it took to make the steel used for well casings and a portion of the necessary pipelines, and the concrete used in the casing process, which were apportioned based on assumptions.

Full article: http://www.energybulletin.net/stories/2011-08-19/shale-ga...

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