Microseismic event azimuth estimation: Establishing a relationship between hodogram linearity and uncertainty in event azimuth

Julian Drew, Robert White, James Wolfe
2008 SEG Technical Program Expanded Abstracts 2008   unpublished
For microseismic data monitored and detected by a downhole vertical array, the polarization, or hodogram information, is needed to determine the event azimuth. To optimally weight when averaging over multiple measurements, we require knowledge of the uncertainties associated with each estimate. We discuss data acquired during a hydraulic stimulation. Using both synthetic data and observed events, by experiment we establish a relationship between the uncertainty in the estimated azimuth (or
more » ... ed azimuth (or error), the signalto-noise ratio, and hodogram rectilinearity. Introduction:
doi:10.1190/1.3059186 fatcat:aqvduzl2fbfwndauu6pufr7yde