CMP stacking for multi-channel analysis of single-shot surface wave data

DOI

10.2991/iceeg-16.2016.69How to use a DOI?

Keywords

masw, cross-correlation, virtual-source, horizontal resolution, cmp stacking, dispersion measurement, cmpcc

Abstract

We demonstrate that common mid-point (CMP) stacking analysis for common virtual-source (CVS) cross-correlation gathers of multi-channel and single-shot surface wave data give accurate phase-velocity curves, and enable us to reconstruct 2D Vs structures with high resolution. Data processing for CMP stacking analysis consists of the following four steps: First, cross-correlations are calculated for every pair of traces in the single-shot gather. Second, correlation traces having a common virtual-source are gathered. Third, dispersion measurements are implemented for each CVS gather with existing dispersion imaging methods, e.g., linear Radon transformation, phase-shift method. Finally, dispersion results of CVS cross-correlation gathers having a common mid-point are stacked to obtain an ultimate dispersion result at the CMP position. With CMP stacking analysis method, it is feasible to reconstruct high-resolution 2D Vs structure by inversing dispersion results at each CMP position. Numerical modelling example indicates the superiority of the new method in improving the accuracy and resolution of subsurface dispersion measurements, compared with conventional MASW method and CMPCC method.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Feng Cheng
AU  - Binbin Mi
AU  - Yue Hu
AU  - Zongbo Xu
AU  - Jianghai Xia
PY  - 2016/06
DA  - 2016/06
TI  - CMP stacking for multi-channel analysis of single-shot surface wave data
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 252
EP  - 255
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.69
DO  - 10.2991/iceeg-16.2016.69
ID  - Cheng2016/06
ER  -