An improved method for hydrofracture induced microseismic event detection and phase picking
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. We apply an array-based waveform correlation approach (matched filter) to improve the detectability of small magnit...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Technical Report |
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Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/68587 |
| _version_ | 1826206959340093440 |
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| author | Song, Fuxian Kuleli, Huseyin Sadi Toksoz, M. Nafi Ay, Erkan Zhang, Haijiang |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Song, Fuxian Kuleli, Huseyin Sadi Toksoz, M. Nafi Ay, Erkan Zhang, Haijiang |
| author_sort | Song, Fuxian |
| collection | MIT |
| description | 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.
We apply an array-based waveform correlation approach (matched filter) to improve the
detectability of small magnitude events with mechanisms and locations similar to a
nearby master event. After detecting the weak events, we use a transformed spectrogram
method to identify the phase arrivals. We have tested the technique on a downhole
monitoring dataset of the microseismic events induced by hydraulic fracturing. We show
that, for this case, one event with a signal-to-noise ratio around 6dB, 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. |
| first_indexed | 2024-09-23T13:41:36Z |
| format | Technical Report |
| id | mit-1721.1/68587 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:41:36Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/685872019-04-10T14:01:12Z An improved method for hydrofracture induced microseismic event detection and phase picking Song, Fuxian Kuleli, Huseyin Sadi Toksoz, M. Nafi Ay, Erkan Zhang, Haijiang Massachusetts Institute of Technology. Earth Resources Laboratory Song, Fuxian Kuleli, Huseyin Sadi Toksoz, M. Nafi Zhang, Haijiang Microseismic 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. We apply an array-based waveform correlation approach (matched filter) to improve the detectability of small magnitude events with mechanisms and locations similar to a nearby master event. After detecting the weak events, we use a transformed spectrogram method to identify the phase arrivals. We have tested the technique on a downhole monitoring dataset of the microseismic events induced by hydraulic fracturing. We show that, for this case, one event with a signal-to-noise ratio around 6dB, 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. Halliburton Company 2012-01-13T20:20:48Z 2012-01-13T20:20:48Z 2010 Technical Report http://hdl.handle.net/1721.1/68587 Earth Resources Laboratory Industry Consortia Annual Report;2010-12 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Microseismic Song, Fuxian Kuleli, Huseyin Sadi Toksoz, M. Nafi Ay, Erkan Zhang, Haijiang An improved method for hydrofracture induced microseismic event detection and phase picking |
| title | An improved method for hydrofracture induced microseismic event detection and phase picking |
| title_full | An improved method for hydrofracture induced microseismic event detection and phase picking |
| title_fullStr | An improved method for hydrofracture induced microseismic event detection and phase picking |
| title_full_unstemmed | An improved method for hydrofracture induced microseismic event detection and phase picking |
| title_short | An improved method for hydrofracture induced microseismic event detection and phase picking |
| title_sort | improved method for hydrofracture induced microseismic event detection and phase picking |
| topic | Microseismic |
| url | http://hdl.handle.net/1721.1/68587 |
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