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3-D Refraction Traveltime Tomography Algorithm Based on Adjoint State TechniquesNormal access

Authors: C. Taillandier, M. Noble, H. Calandra, H. Chauris and P. Podvin
Event name: 70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008
Session: Velocity Model Building (EAGE)
Publication date: 09 June 2008
DOI: 10.3997/2214-4609.20147939
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 648Kb )
Price: € 20

Summary:
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.


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