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

摘要：

　　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.

关键词： masw cross-correlation virtual-source horizontal resolution cmp stacking dispersion measurement cmpcc

作者: Feng Cheng Binbin Mi Yue Hu Zongbo Xu Jianghai Xia

作者单位: Institute of Geophysics and Geomatics China University of Geosciences Wuhan, China Hubei Subsurface Multi-scale Imaging Key Laboratory China University of Geosciences Wuhan, China

会议类型: 国际会议

会议名称: The 7th International Conference on Environmental and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology (ICEEG 2016)(第七届环境与工程地球物理学国际会议)

会议地点: 北京

会议语种:英文

页码: 254-257

在线出版日期: 2016-06-27（万方平台首次上网日期，不代表论文的发表时间）