The design of L1-norm visco-acoustic wavefield extrapolators
| Autor: | Syed Abdul Salam, Wail A. Mousa |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Geophysical imaging
Attenuation 0211 other engineering and technologies Extrapolation 02 engineering and technology Prestack 010502 geochemistry & geophysics 01 natural sciences Geophysics Norm (mathematics) Norm minimization Algorithm Geology Acoustic medium Data migration 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Journal of Applied Geophysics. 151:157-165 |
| ISSN: | 0926-9851 |
| DOI: | 10.1016/j.jappgeo.2018.01.018 |
| Popis: | Explicit depth frequency–space ( f − x ) prestack imaging is an attractive mechanism for seismic imaging. To date, the main focus of this method was data migration assuming an acoustic medium, but until now very little work assumed visco-acoustic media. Real seismic data usually suffer from attenuation and dispersion effects. To compensate for attenuation in a visco-acoustic medium, new operators are required. We propose using the L 1 -norm minimization technique to design visco-acoustic f − x extrapolators. To show the accuracy and compensation of the operators, prestack depth migration is performed on the challenging Marmousi model for both acoustic and visco-acoustic datasets. The final migrated images show that the proposed L 1 -norm extrapolation results in practically stable and improved resolution of the images. |
| Databáze: | OpenAIRE |
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