1887

Abstract

A simple geodynamical framework has been developed for simulation of frac-induced microseismicity. Subject to exceedance of a threshold value of time-dependent Coulomb failure stress, microseismicity is postulated to occur at random locations and with event magnitudes that satisfy the Gutenberg-Richter magnitude-recurrence relation. Simulations using this approach have many characteristics of observed microseismic clouds. Walter-Brune source spectra are considered for both tensile and shear events, which are parameterized by P- and S-wave corner frequencies and DC displacement factors. Pure tensile events may be distinguished from shear slip events based on low S/P amplitude ratios. Finally, a crack that opens and closes very quickly is characterized by periodic resonance and spectral notches similar to observed spectra of some low-frequency events.

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/content/papers/10.3997/2214-4609.20148188
2012-06-04
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20148188
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