Abstract
We discuss an algorithm to regularize elastic waveform inversions using wavelet-based constructive approximations of the data, synthetic and observed, in models that evolve as part of a gradient-based iterative scheme relying on forward and adjoint modeling carried out with a spectral-element method. For an elastic Marmousi model we show how our wavelet-based multiscale waveform inversion proceeds successively from large to small scales in the seismograms, with a progressive increase of the complexity of the resulting model. We explore the sensitivity of surface waves in imaging shallow structure. To circumvent cycle skipping we designed an envelope-misfit function within a wavelet-multiscale framework. We test our approach in a toy model in preparation for inversions at full complexity.
Original language | English (US) |
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Pages (from-to) | 1194-1199 |
Number of pages | 6 |
Journal | SEG Technical Program Expanded Abstracts |
Volume | 33 |
DOIs | |
State | Published - 2014 |
Event | SEG Denver 2014 Annual Meeting, SEG 2014 - Denver, United States Duration: Oct 26 2011 → Oct 31 2011 |
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology
- Geophysics