High-resolution multimode surface-wave dispersion spectrum imaging with a multichannel signal comparison method
文献类型：期刊论文
| 作者 | Yi Jia2; Liu YiKe4; Hu Hao1; Zhang YuShan2; Yang ZongQi3 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 64期号:5页码:1710-1720 |
| ISSN号 | 0001-5733 |
| 关键词 | Shallow subsurface seismic exploration S-wave velocity Surface-wave Dispersion curve Signal comparison method |
| DOI | 10.6038/cjg202100184 |
| 英文摘要 | High-resolution surface-wave dispersion spectrum imaging is crucial for estimating the shallow subsurface S-wave velocity based on the dispersion properties. In global seismic exploration, linear signal comparison (LSC) method is widely used to compute the dispersion spectrum, which uses only two seismic records. However, LSC relies on a cross-correlation strategy that leads to poor resolution in the low-frequency regions. Nonlinear signal comparison (NLSC) approach overcomes the resolution problem and can achieve high-resolution imaging by using the exponential function. However, we find that LSC and NLSC both suffer a severe problem: the higher modes imaging is inaccurate since the dispersion properties are not fully considered by utilizing only two recorded data. Based on the multichannel acquisition system in active source surface wave exploration, multichannel signal comparison (MSC) method takes all the signals into account, which can obtain an accurate multimode dispersion spectrum. However, MSC method needs to compare the signals of every two records that cause the problem of redundant calculation and low efficiency. Therefore, we improve the computational efficiency of MSC method by tracing the surface wave in the shot gathers. By comparing with the theoretical dispersion curves, we verify the effectiveness of the modified MSC method. Through comparing with the phase shift method, LSC, and NLSC, we demonstrate that MSC is a high-resolution and high-precision surface-wave multimode dispersion spectrum imaging approach. The application of field data reveals the great potential of MSC method in extracting multimode surface wave dispersion information in shallow seismic exploration. |
| WOS关键词 | DYNAMIC-RESPONSE ; INVERSION ; VALLEY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000647152100020 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101238]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Liu YiKe |
| 作者单位 | 1.Univ Houston, Houston, TX 77204 USA 2.China Earthquake Disaster Prevent Ctr, Beijing 100029, Peoples R China 3.CNPC, BGP INC, Zhuozhou 072750, Hebei, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yi Jia,Liu YiKe,Hu Hao,et al. High-resolution multimode surface-wave dispersion spectrum imaging with a multichannel signal comparison method[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2021,64(5):1710-1720. |
| APA | Yi Jia,Liu YiKe,Hu Hao,Zhang YuShan,&Yang ZongQi.(2021).High-resolution multimode surface-wave dispersion spectrum imaging with a multichannel signal comparison method.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,64(5),1710-1720. |
| MLA | Yi Jia,et al."High-resolution multimode surface-wave dispersion spectrum imaging with a multichannel signal comparison method".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 64.5(2021):1710-1720. |
入库方式： OAI收割
来源：地质与地球物理研究所
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