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...

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Main Authors: Song, Fuxian, Kuleli, Huseyin Sadi, Toksoz, M. Nafi, Ay, Erkan, Zhang, Haijiang
Other Authors: Massachusetts Institute of Technology. Earth Resources Laboratory
Format: Technical Report
Published: Massachusetts Institute of Technology. Earth Resources Laboratory 2012
Subjects:
Online Access:http://hdl.handle.net/1721.1/68587
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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.
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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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