3-D refraction traveltime tomography algorithm based on adjoint state techniques
| Autor: | Pascal Podvin, Hervé Chauris, Mark Noble, Cédric Taillandier, Henri Calandra |
|---|---|
| Přispěvatelé: | Centre de Géosciences (GEOSCIENCES), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), TOTAL S.A., TOTAL FINA ELF |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Regional geology
Travel time tomography refraction Eikonal equation [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Function (mathematics) 010502 geochemistry & geophysics 01 natural sciences Refraction Physics::Geophysics velocity model building 010101 applied mathematics near subsurface imaging Conjugate gradient method Adjoint state method Tomography 0101 mathematics Algorithm diving waves Geology 0105 earth and related environmental sciences Environmental geology |
| Zdroj: | Proceedings of 70th EAGE Conference and Technical Exhibition, Eur. Ass. of Geoscientists and Engineers 70th EAGE Conference and Technical Exhibition, Eur. Ass. of Geoscientists and Engineers 70th EAGE Conference and Technical Exhibition, Eur. Ass. of Geoscientists and Engineers, Jun 2008, Rome, Italy. pp.P163 |
| Popis: | International audience; Classical 3-D refraction traveltime tomography algorithms may suffer from computational limitations due to the large datasets that come from current seismic acquisition surveys. To overcome these issues, we suggest a 3-D refraction tomography algorithm based on adjoint state techniques to derive the gradient of the traveltime misfit function. We use the Eikonal equation for the forward modelling, and iterate with a conjugate gradient method. A 3-D synthetic example with a realistic size acquisition demonstrates the efficiency and the great potential of the adjoint state method for 3-D applications of refraction tomography. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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