Detection and location for microseismic events recorded by single-downhole acquisition with crosscorrelation method
- Xiaobo Meng (China University of Petroleum—Beijing) | Haichao Chen (China University of Petroleum—Beijing) | Fenglin Niu (China University of Petroleum—Beijing) | Youcai Tang (China University of Petroleum—Beijing) | Qiankun Zuo (China University of Petroleum—Beijing)
- Document ID
- Society of Exploration Geophysicists
- 2016 SEG International Exposition and Annual Meeting, 16-21 October, Dallas, Texas
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Exploration Geophysicists
- Downhole receivers, Correlation, Azimuth
- 0 in the last 30 days
- 26 since 2007
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We develop a novel approach for detection and relative location of weak microseismic events based on waveform cross-correlation. We treat microseismic events with high signal to noise ratio (SNR) as master events and cross-correlate with continuous recording using both P- and S-waves to detect weak events (slave events). Subsequently, the detected weak events were located relatively to the master events, by stacking together the P- and S-waves cross-correlations along differential moveouts. Specifically, we add the azimuth restriction of P-wave to the cross-correlation stacking to improve the location accuracy in the case of single downhole acquisition. The utility of this technique is demonstrated with synthetic events. Then, we applied our method to real microseismic data from one stage of hydraulic fracturing operation. 1140 events were detected and located, which is approximately 4 times the number of events from conventional method.
Presentation Date: Tuesday, October 18, 2016
Start Time: 1:50:00 PM
Location: Lobby D/C
Presentation Type: POSTER
|File Size||2 MB||Number of Pages||5|
Gibbons,S., andF.Ringdal,2006,The detection of low magnitude seismic events using array-based waveform correlation:Geophysical Journal International,165,149–166,10.1111/j.1365-246X.2006.02865.x.
Oye,V., andM.Roth,2003,Automated seismic event location for hydrocarbon reservoirs:Computers and Geosciences,29,851–863,10.1016/S0098-3004(03)00088–8.
Peng,Z., andP.Zhao,2009,Migration of early aftershocks following the 2004 Parkfield earthquake:Nature Geoscience,2,877–881,10.1038/ngeo697.
Rutledge,J. T., andW. S.Phillips,2003,Hydraulic stimulation of natural fractures as revealed by induced microearthquakes, Carthage Cotton Valley gas field, east Texas:Geophysics,68,441–452,10.1190/1.1567214.
Zhang,M., andL.Wen,2015,An effective method for small event detection: Match and Locate (M&L):Geophysical Journal International,200,1523–1537,10.1093/gji/ggu466.