Hydraulic Fracturing Technology - Department of Energy (.gov)
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Hydraulic fracturing is a technique in which large volumes of water and sand, and small volumes of chemical additives are injected into low-permeability subsurface formations to increase oil or natural gas flow. The injection pressure of the pumped fluid creates fractures that enhance gas and fluid flow, and the sand or other coarse material holds the fractures open. Most of the injected fluid flows back to the wellbore and is pumped to the surface. Hydraulic fracturing has been used for over 60 years in over one million wells. Recently, public concern about potential impacts on drinking water and other environmental damage has significantly grown. Consequently, Congress directed the Environmental Protection Agency (EPA) in 2010 to conduct a study of this practice to better understand any potential impacts of hydraulic fracturing on drinking water and groundwater. DOE/NETL is working closely with the EPA as it carries out the study and is also collaborating with the Department of the Interior to enhance understanding of these risks. On May 5, 2011, U. S.
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