Early-arrival waveform inversion for near-surface velocity estimation
Abstract/Contents
- Abstract
- Early-arrival Waveform Inversion is a powerful tool for high-resolution near-surface velocity estimation. By matching observed diving waves and refractions with forward modeled diving waves and refractions, high-resolution near-surface models can be obtained. However, conventional waveform inversion requires accurate starting models and exact matching of data amplitude. Both of these requirements are difficult to meet in field data, especially land data applications. In addition, current industry implementations of waveform inversion encounter serious I/O bottlenecks in large 3D applications.This dissertation addresses these three problems associated with practical applications of waveform inversion. The constraint of accurate starting models is relaxed by applying wave-equation traveltime inversion before applying the waveform inversion. The requirement of exact data amplitude matching is relaxed by applying a new objective function that relies heavily on phase and waveform matching, while ignoring absolute amplitude. The I/O bottleneck associated with the current industry implementations is eliminated by using a low-frequency random boundary scheme. I demonstrate the effectiveness of the methodologies using synthetic and field data examples.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2014 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Shen, Xukai |
|---|---|
| Associated with | Stanford University, Department of Geophysics. |
| Primary advisor | Biondi, Biondo, 1959- |
| Thesis advisor | Biondi, Biondo, 1959- |
| Thesis advisor | Claerbout, Jon F |
| Thesis advisor | Clapp, Robert G. (Robert Graham) |
| Thesis advisor | Lawrence, Jesse |
| Advisor | Claerbout, Jon F |
| Advisor | Clapp, Robert G. (Robert Graham) |
| Advisor | Lawrence, Jesse |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Xukai Shen. |
|---|---|
| Note | Submitted to the Department of Geophysics. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2014. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2014 by Xukai Shen
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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