Waveform inversion for microseismic velocity analysis and event location in VTI media
© 2017 Society of Exploration Geophysicists. Waveform inversion (WI), which has been extensively used in reflection seismology, could provide improved velocity models and event locations for microseismic surveys. Here, we develop an elastic WI algorithm for anisotropic media designed to estimate the...
| Main Authors: | , |
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| Format: | Journal Article |
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Society of Exploration Geophysics
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/72740 |
| _version_ | 1848762829830619136 |
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| author | Michel, O. Tsvankin, Ilya |
| author_facet | Michel, O. Tsvankin, Ilya |
| author_sort | Michel, O. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Society of Exploration Geophysicists. Waveform inversion (WI), which has been extensively used in reflection seismology, could provide improved velocity models and event locations for microseismic surveys. Here, we develop an elastic WI algorithm for anisotropic media designed to estimate the 2D velocity field along with the source parameters (location, origin time, and moment tensor) from microseismic data. The gradient of the objective function is obtained with the adjoint-state method, which requires just two modeling simulations at each iteration. In the current implementation the source coordinates and velocity parameters are estimated sequentially at each stage of the inversion to minimize trade-offs and improve the convergence. Synthetic examples illustrate the accuracy of the inversion for layered VTI (transversely isotropic with a vertical symmetry axis) media, as well as the sensitivity of the velocity-analysis results to noise, the length of the receiver array, errors in the initial model, and variability in the moment tensor of the recorded events. |
| first_indexed | 2025-11-14T10:53:47Z |
| format | Journal Article |
| id | curtin-20.500.11937-72740 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:53:47Z |
| publishDate | 2017 |
| publisher | Society of Exploration Geophysics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-727402018-12-13T09:34:51Z Waveform inversion for microseismic velocity analysis and event location in VTI media Michel, O. Tsvankin, Ilya © 2017 Society of Exploration Geophysicists. Waveform inversion (WI), which has been extensively used in reflection seismology, could provide improved velocity models and event locations for microseismic surveys. Here, we develop an elastic WI algorithm for anisotropic media designed to estimate the 2D velocity field along with the source parameters (location, origin time, and moment tensor) from microseismic data. The gradient of the objective function is obtained with the adjoint-state method, which requires just two modeling simulations at each iteration. In the current implementation the source coordinates and velocity parameters are estimated sequentially at each stage of the inversion to minimize trade-offs and improve the convergence. Synthetic examples illustrate the accuracy of the inversion for layered VTI (transversely isotropic with a vertical symmetry axis) media, as well as the sensitivity of the velocity-analysis results to noise, the length of the receiver array, errors in the initial model, and variability in the moment tensor of the recorded events. 2017 Journal Article http://hdl.handle.net/20.500.11937/72740 10.1190/GEO2016-0651.1 Society of Exploration Geophysics restricted |
| spellingShingle | Michel, O. Tsvankin, Ilya Waveform inversion for microseismic velocity analysis and event location in VTI media |
| title | Waveform inversion for microseismic velocity analysis and event location in VTI media |
| title_full | Waveform inversion for microseismic velocity analysis and event location in VTI media |
| title_fullStr | Waveform inversion for microseismic velocity analysis and event location in VTI media |
| title_full_unstemmed | Waveform inversion for microseismic velocity analysis and event location in VTI media |
| title_short | Waveform inversion for microseismic velocity analysis and event location in VTI media |
| title_sort | waveform inversion for microseismic velocity analysis and event location in vti media |
| url | http://hdl.handle.net/20.500.11937/72740 |