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Earthqakes and fluid injection

Conference · · Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:5666913
Earthquakes have been clearly linked to subsurface fluid injection in 2 places--near Denver at the Rocky Mt. Arsenal's waste-disposal well, and at the Rangely oil field in NW Colorado. The theory linking fluid pressure to earthquakes is based on the effective stress concept, i.e., that increases of pore pressure reduce the effective normal stress across existing or potential fracture surfaces. In both cases, evidence exists for substantial tectonic shearing stresses in the reservoir rock prior to injection. Although the initial shear stress was below the critical value necessary to cause failure, fluid injection relieved a fraction of the frictional resistance to shear fracture, and earthquakes resulted. The Rangely experience suggests that seismic activity due to waterflooding in oil fields may be controlled without seriously disrupting production of oil.
Research Organization:
Geological Survey
OSTI ID:
5666913
Report Number(s):
CONF-711233-
Conference Information:
Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 55:11
Country of Publication:
United States
Language:
English