Microseismic data are traditionally restricted to locations of hypocentres and have been of great utility in outlining the geometries of the stimulated regions for hydraulic fracturing and other injection programs. However, there is much more information to be gained from careful analysis of the microseismic data, the key to unlocking this potential rests not only in careful analysis, but also in recording the data from properly calibrated arrays, with a heterogeneous distribution of sensors to allow for wideband recording, and with geometries that enable such higher-order processing techniques. The wideband recording ensures that the magnitude range can be accurately calculated for the large magnitude events that potentially saturate the 10 or 15 Hz instruments normally deployed for microseismic monitoring. By recording the seismic waveforms from a number of azimuths, techniques like seismic moment tensor inversion (SMTI) can be employed to gain an understanding of the fracture network that is being activated during these treatments, and the fracture modes (tensile, shear, shear-tensile) for each event, giving a clear picture of the dynamics of the discrete fracture network during hydraulic stimulations.


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