Monday, June 17, 2013

Not Just Cleaner: Fracking A Good Energy Return On Investment Also

Not Just Cleaner: Fracking A Good Energy Return On Investment Also:
Natural gas is much cleaner than coal but it's also important that its energy return on investment (EROI) - the total input energy with the energy expected to be made available to end users - is similar to coal, according to a paper in the Journal of Industrial Ecology.


The paper looked at gas from horizontal, hydraulically fractured wells in the Marcellus Shale of Pennsylvania and their analysis indicates that the EROI ratio of a typical well is likely between 64:1 and 112:1, with a mean of approximately 85:1. This range assumes an estimated ultimate recovery of 3.0 billion cubic feet per well, similar to the estimated ultimate recovery of coal, which falls between 50:1 and 85:1.




read more