NRC report concludes hydraulic fracturing poses low risk for causing earthquakes, but risks are higher for wastewater injection wells; CCS impact undetermined
Green Car Congress
JUNE 17, 2012
Schematic diagram of a shale gas well following hydraulic fracture treatment, with the relative depths of local water wells shown for scale. Formation depths and horizontal well length varies; numbers shown are approximate length and depth averages in North America. The upper right inset shows the fractures (yellow) created during hydraulic fracture treatment in stages.
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