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What moved where?: The impact of velocity uncertainty on microseismic location and moment-tensor inversion

Author(s)
Malcolm, Alison E.; Poliannikov, Oleg V.; Fehler, Michael
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Abstract
With the rise of unconventional resources, microseismic monitoring is becoming increasingly important because of its cost-effectiveness. This has led to significant research activity on how best to locate events and characterize their moment tensors. Locations tell us where fracturing is occurring, allow the tracking of fluid movement, and fracture propagation. Moment tensors help to determine the type of failure occurring, which is beneficial in planning and interpreting the results of hydraulic-fracturing jobs and in monitoring production. The rising number of methods to determine parameters raises important questions about how uncertainties in the input parameters are translated into uncertainties in the final locations and moment tensors. We present a framework for assessing these uncertainties and use it to demonstrate how velocity uncertainty — as well as uncertainties in arrival times and amplitudes — translates into uncertainties on the recovered quantities of location and moment-tensor parameters.
Date issued
2017-01
URI
http://hdl.handle.net/1721.1/110053
Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Journal
The Leading Edge
Publisher
Society of Exploration Geophysicists
Citation
Poliannikov, Oleg; Malcolm, Alison and Fehler, Michael. “What Moved Where?: The Impact of Velocity Uncertainty on Microseismic Location and Moment-Tensor Inversion.” The Leading Edge 36, no. 2 (February 2017): 166–170 © 2017 The Society of Exploration Geophysicists
Version: Final published version
ISSN
1070-485X
1938-3789

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