DOI: 10.1016/j.tecto.2021.228761
论文题名: Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane
作者: Zhang P. ; Gao R. ; Han L. ; Lu Z.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 803 语种: 英语
中文关键词: Deep reflection seismic profile
; Full waveform inversion
; Lhasa Terrane
; Multiples
; Refraction wave
英文关键词: Geology
; Morphology
; Seismic waves
; Seismology
; Tomography
; Underground structures
; Velocity
; Waveform analysis
; Full-waveform inversion
; Geological characteristics
; Interface morphologies
; Lateral velocities
; Normalized cross correlation
; Small-scale velocity
; Travel time information
; Vertical direction
; Refraction
; data inversion
; seismic reflection
; seismic refraction
; seismic wave
; terrane
; wave field
; waveform analysis
; China
; Lhasa Terrane
; Xizang
英文摘要: The deep reflection seismic method is an effective technique for detecting the fine structures of the lithosphere and solving deep geological problems. At present, the methods for obtaining the underground velocity from land deep reflection seismic profile mainly rely on the travel-time information based velocity analysis and tomography, which theoretically limit the resolution of the imaging results. To achieve the goal of using deep reflection seismic profile for crustal-scale high-precision velocity imaging, we must finally overcome the problem of full waveform inversion (FWI) using full wavefield data. In this paper, we successfully conduct FWI using the early-arrival wavefields (mainly primary and multiple refraction wavefields) in the deep reflection seismic profile, which can be seen as the first important step towards the goal of crustal-scale high-precision velocity imaging. We propose a robust refraction waves FWI workflow with global normalized cross-correlation, multiple refraction matching, reverse time source estimation and wavenumber domain gradient filtering as its core algorithm. The application of the proposed FWI method to the refraction waves of the deep reflection seismic profiles in the central part of Lhasa Terrane shows that the refraction FWI images have a higher resolution to underground structures both in horizontal and vertical directions than the first-arrival tomography images. The lateral velocity change can be well-matched with the typical geological characteristics of the work area. The FWI result can better describe the lateral boundaries of the strata in different eras. At a depth of less than 3 km from the surface, the refraction FWI can correct the interface morphology of the tomography results and recover some small-scale velocity structures and high-velocity anomalies. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170939
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: College of Geo-exploration Science and Technology, Jilin University, Changchun, Jilin, 130026, China; School of Earth Science and Geological Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China; Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China; Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China
Recommended Citation:
Zhang P.,Gao R.,Han L.,et al. Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane[J]. Tectonophysics,2021-01-01,803