Chapter
Mar 30, 2017
Quantifying and Analyzing the Signal-to-Noise Ratio in Down-Hole Seismic Testing
Authors: Mark A. Styler, Ph.D. [email protected], Ilmar Weemees [email protected], and John Rogie, A.M.ASCE [email protected]Author Affiliations
Publication: Geotechnical Frontiers 2017
Abstract
Seismic traces are obtained during the seismic cone penetration test (SCPTu). These traces are compared to determine the propagation time, which is used to calculate seismic wave velocities. We present a method to quantify the quality of the trace by calculating the signal to noise ratio (SNR). We analyzed a set of 25 SCPTu profiles to investigate how SNR degrades with increased penetration depth. We show that signal-stacking repeated seismic tests can be used to mitigate the loss of signal to noise ratio without a significant penalty to the production rate of the seismic cone penetration test at typical test depths. Our work has implications in the development of best-practice down-hole seismic testing. This may improve the confidence in the reported shear wave velocities and lead to improved shear wave velocity applications.
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Published In
Geotechnical Frontiers 2017
Pages: 667 - 676
Copyright
© 2017 American Society of Civil Engineers.
History
Published online: Mar 30, 2017
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ConeTec Investigations, Ltd., 12140 Vulcan Way, Richmond, BC V6V 1J8. E-mail: [email protected]
P.G.
ConeTec Investigations, Ltd., 12140 Vulcan Way, Richmond, BC V6V 1J8. E-mail: [email protected]
P.G.
California Push Technologies, Inc., 820 Aladdin Ave., San Leandro, CA 84577. E-mail: [email protected]
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