Quantifying the uncertainty in fault plane solutions inferred from S/P amplitude ratios
- Oleg Poliannikov (Massachusetts Institute of Technology) | Michael Fehler (Massachusetts Institute of Technology) | William Rodi (Massachusetts Institute of Technology)
- 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
- Earthquake, Induced seismicity, Microseismic, 3D
- 0 in the last 30 days
- 27 since 2007
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We study the problem of the moment tensor inversion of a double-couple microseismic source from observed S/P amplitude ratios. The emphasis of this work is on uncertainty quantification that includes the effect of the uncertain event location. We use a Bayesian approach to quantify the uncertainty of the fault plane solution. The posterior distribution is effectively calculated by sampling from the posterior distribution of the event location, and performing a moment-tensor inversion using individual samples. The uncertainty in the reconstructed moment tensor depends on the receiver geometry, signal noise, and the true moment tensor. After a suitable transformation of the input data, the problem can be reduced to a classical least-squares estimation problem.
Presentation Date: Tuesday, October 18, 2016
Start Time: 8:50:00 AM
Presentation Type: ORAL
|File Size||4 MB||Number of Pages||5|
Eisner,L.,P. M.Duncan,W. M.Heigl, andW. R.Keller,2009,Uncertainties in passive seismic monitoring:The Leading Edge,28,648–655,10.1190/1.3148403.
Eyre,T. S., andM.van der Baan,2015,Overview of moment-tensor inversion of microseismic events:The Leading Edge,34,882–888,10.1190/tle34080882.1.
Li,J.,H. SadiKuleli,H.Zhang, andM. NafiToksöz,2011a,Focal mechanism determination of induced microearthquakes in an oil field using full wave-forms from shallow and deep seismic networks:Geophysics,76, no.6,WC87–WC101,10.1190/geo2011-0030.1.
Li,J.,H.Zhang,H. SadiKuleli, andM. NafiToksöz,2011b,Focal mechanism determination using high-frequency waveform matching and its application to small magnitude induced earthquakes:Geophysical Journal International,184,1261–1274,10.1111/j.1365-246X.2010.04903.x.
Maxwell,S.,2014,Microseismic imaging of hydraulic fracturing: Improved engineering of unconventional shale reservoirs(1st ed.):SEG, Distinguished Instructor Series17,10.1190/1.9781560803164.
Poliannikov,O. V.,M.Prange,A. E.Malcolm, andH.Djikpesse,2014,Joint location of microseismic events in the presence of velocity uncertainty:Geophysics,79, no.6,KS51–KS60,10.1190/geo2013-0390.1.
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.