Spectral investigations of hydraulic fracture induced seismic events

Details Spectral investigations of hydraulic fracture induced seismic events Spectral investigations of hydraulic fracture induced seismic events

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pepi...69..304s&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 69, Issue 3-4, p. 304-310.

Physics

Scientific paper

Seismo-acoustic registrations were performed during massive hydraulic fracturing experiments in a deep borehole. The recorded seismic pulses were used to locate seismic events and to calculate source parameters, which were calculated for compressional waves using the models of Brune and Madariaga. The seismic moment is between 5 × 106 Nm and 9 × 107 Nm. The source radii according to Madariaga's model range from 2 to 4 m. Stress drops vary from 0.4 to 3.0 MPa. The dislocation is around 1 × 10-4 m. There is a good correlation between seismic moment, stress drop and dislocation with depth of the hypocentre. The reason for the resulting coherence lies in the geomechanical characteristics of the focal region. The scaling laws investigated demonstrate that there is no physical difference between induced seismicity and natural earthquakes.

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