Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort
We have developed a first-arrival traveltime inversion scheme that jointly solves for seismic velocities and source and receiver static-time terms. The static-time terms are included to compensate for varying time delays introduced by the near-surface low-velocity layer that is too thin to be resolv...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Society of Exploration Geophysics
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/18185 |
| _version_ | 1848749672575795200 |
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| author | Tryggvason, A. Schmelzbach, C. Juhlin, Christopher |
| author_facet | Tryggvason, A. Schmelzbach, C. Juhlin, Christopher |
| author_sort | Tryggvason, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have developed a first-arrival traveltime inversion scheme that jointly solves for seismic velocities and source and receiver static-time terms. The static-time terms are included to compensate for varying time delays introduced by the near-surface low-velocity layer that is too thin to be resolved by tomography. Results on a real data set consisting of picked first-arrival times from a seismic-reflection 2D/3D experiment in a crystalline environment show that the tomography static-time terms are very similar in values and distribution to refraction-static corrections computed using standard refraction-statics software. When applied to 3D seismic-reflection data, tomography static-time terms produce similar or more coherent seismic-reflection images compared to the images using corrections from standard refraction-static software. Furthermore, the method provides a much more detailed model of the near-surface bedrock velocity than standard software when the static-time terms are included in the inversion. Low-velocity zones in this model correlate with other geologic and geophysical data, suggesting that our method results in a reliable model. In addition to generally being required in seismic-reflection imaging, static corrections are also necessary in traveltime tomography to obtain high-fidelity velocity images of the subsurface. © 2009 Society of Exploration Geophysicists. |
| first_indexed | 2025-11-14T07:24:40Z |
| format | Journal Article |
| id | curtin-20.500.11937-18185 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:24:40Z |
| publishDate | 2009 |
| publisher | Society of Exploration Geophysics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-181852017-09-13T13:46:47Z Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort Tryggvason, A. Schmelzbach, C. Juhlin, Christopher We have developed a first-arrival traveltime inversion scheme that jointly solves for seismic velocities and source and receiver static-time terms. The static-time terms are included to compensate for varying time delays introduced by the near-surface low-velocity layer that is too thin to be resolved by tomography. Results on a real data set consisting of picked first-arrival times from a seismic-reflection 2D/3D experiment in a crystalline environment show that the tomography static-time terms are very similar in values and distribution to refraction-static corrections computed using standard refraction-statics software. When applied to 3D seismic-reflection data, tomography static-time terms produce similar or more coherent seismic-reflection images compared to the images using corrections from standard refraction-static software. Furthermore, the method provides a much more detailed model of the near-surface bedrock velocity than standard software when the static-time terms are included in the inversion. Low-velocity zones in this model correlate with other geologic and geophysical data, suggesting that our method results in a reliable model. In addition to generally being required in seismic-reflection imaging, static corrections are also necessary in traveltime tomography to obtain high-fidelity velocity images of the subsurface. © 2009 Society of Exploration Geophysicists. 2009 Journal Article http://hdl.handle.net/20.500.11937/18185 10.1190/1.3240931 Society of Exploration Geophysics restricted |
| spellingShingle | Tryggvason, A. Schmelzbach, C. Juhlin, Christopher Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort |
| title | Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort |
| title_full | Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort |
| title_fullStr | Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort |
| title_full_unstemmed | Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort |
| title_short | Traveltime tomographic inversion with simultaneous static corrections - Well worth the effort |
| title_sort | traveltime tomographic inversion with simultaneous static corrections - well worth the effort |
| url | http://hdl.handle.net/20.500.11937/18185 |