Correlation Detection and Location for Microseismic Events Induced by Hydraulic Fracturing

We develop methodology of correlation detection and relative location for microseismic events induced by hydraulic fracturing. Specifically we apply the methodology to surface recording by cross-correlating strong (master) events to detect weak events (slaves). Furthermore, we show how real events with weak signal can be detected in the presence of high surface noise. We also locate detected events relative to master by stacking of cross-correlations along differential moveouts. We show methodology to select representative master events suitable for hydraulic fracturing induced seismicity. We apply this methodology to hydraulic fracturing data and detect similar number and consistent locations of microseismic events as we obtained with direct location technique.