Joint location of microseismic events in the presence of velocity uncertainty
Name
Poliannikov-2014-Joint location of mi.pdf
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334.93 KB
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Author(s)
Poliannikov, Oleg V.
Prange, Michael
Malcolm, Alison E.
Djikpesse, Hugues
Date Issued
October 2014
Journal
Geophysics
Publisher
Society of Exploration Geophysicists
Citation
Poliannikov, Oleg V., Michael Prange, Alison E. Malcolm, and Hugues Djikpesse. “Joint Location of Microseismic Events in the Presence of Velocity Uncertainty.” GEOPHYSICS 79, no. 6 (October 24, 2014): KS51–KS60. © 2014 Society of Exploration Geophysicists
Version
Final published version
Abstract
The locations of seismic events are used to infer reservoir properties and to guide future production activity, as well as to determine and understand the stress field. Thus, locating seismic events with uncertainty quantification remains an important problem. Using Bayesian analysis, a joint probability density function of all event locations was constructed from prior information about picking errors in kinematic data and explicitly quantified velocity model uncertainty. Simultaneous location of all seismic events captured the absolute event locations and the relative locations of some events with respect to others, along with their associated uncertainties. We found that the influence of an uncertain velocity model on location uncertainty under many realistic scenarios can be significantly reduced by jointly locating events. Many quantities of interest that are estimated from multiple event locations, such as fault sizes and fracture spacing or orientation, can be better estimated in practice using the proposed approach.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Earth Resources Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1190/GEO2013-0390.1
