%0 Journal Article %1 song_etal:2010 %A Song, Fuxian %A Kuleli, H. Sadi %A Toksöz, M. Nafi %A Ay, Erkan %A Zhang, Haijiang %D 2010 %I SEG %J Geophysics %K geophysics seismology %N 6 %P A47--52 %R 10.1190/1.3484716 %T An improved method for hydrofracture-induced microseismic event detection and phase picking %U http://dx.doi.org/10.1190/1.3484716 %V 75 %X The ability to detect small microearthquakes and identify their P- and S-phase arrivals is a key issue in hydrofracture downhole monitoring because of the low signal-to-noise ratios (S/N). An array-based waveform correlation approach (matched filter) is applied to improve the detectability of small magnitude events with mechanisms and locations similar to a nearby master event. After detecting the weak events, a transformed spectrogram method is used to identify the phase arrivals. The technique has been tested on a downhole monitoring data set of the microseismic events induced by hydraulic fracturing. It is shown that, for this case, one event with a S/N around 6 dB, which is barely detectable using an array-stacked short-time average/long-time average (STA/LTA) detector under a reasonable false alarm rate, is readily detected on the array-stacked correlation traces. The transformed spectrogram analysis of the detected events improves P- and S-phase picking.

@article{song_etal:2010, abstract = {The ability to detect small microearthquakes and identify their P- and S-phase arrivals is a key issue in hydrofracture downhole monitoring because of the low signal-to-noise ratios (S/N). An array-based waveform correlation approach (matched filter) is applied to improve the detectability of small magnitude events with mechanisms and locations similar to a nearby master event. After detecting the weak events, a transformed spectrogram method is used to identify the phase arrivals. The technique has been tested on a downhole monitoring data set of the microseismic events induced by hydraulic fracturing. It is shown that, for this case, one event with a S/N around 6 dB, which is barely detectable using an array-stacked short-time average/long-time average (STA/LTA) detector under a reasonable false alarm rate, is readily detected on the array-stacked correlation traces. The transformed spectrogram analysis of the detected events improves P- and S-phase picking.}, added-at = {2012-09-01T13:08:21.000+0200}, author = {Song, Fuxian and Kuleli, H. Sadi and Toks\"{o}z, M. Nafi and Ay, Erkan and Zhang, Haijiang}, biburl = {https://www.bibsonomy.org/bibtex/2cbbcc045700978f76a60c5a641e422c0/nilsma}, day = 1, doi = {10.1190/1.3484716}, interhash = {7a49760afac597185abb145c8be27428}, intrahash = {cbbcc045700978f76a60c5a641e422c0}, journal = {Geophysics}, keywords = {geophysics seismology}, month = nov, number = 6, pages = {A47--52}, publisher = {SEG}, timestamp = {2021-02-09T13:25:34.000+0100}, title = {An improved method for hydrofracture-induced microseismic event detection and phase picking}, url = {http://dx.doi.org/10.1190/1.3484716}, volume = 75, year = 2010 }