3D elastic migration with topography based on spectral-element and adjoint methods

Yang Luo, Jeroen Tromp, Bertrand Denel, Henri Calandra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Although wave equation based migration techniques, such as Reverse Time Migration (RTM), have been popular for years, the acoustic approximation is still applied frequently. Even when considering anisotropic behavior, modifications to the acoustic wave equation are invoked to facilitate changes in wavespeed along different directions. In a classical marine survey, seismic waves are generated in the water layer and observations are recorded in the form of pressure fluctuations. In that case, using a purely acoustic wave equation is a reasonable assumption, since conversions between compressional and shear motions along the ocean bottom are weak. However, with the availability of Ocean Bottom Cables (OBCs) or in land surveys, shear waves do play an important role. On one hand, incorporating elastic information in imaging may enhance the coherence of arrivals and thus provide better images. On the other hand, recorded shear signals might contaminate the image if falsely interpreted as reflected compressional waves. Following these considerations, we carry out a 3D elastic experiment investigating proper imaging conditions for elastic migration.

Original languageEnglish (US)
Title of host publicationSociety of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012
PublisherSociety of Exploration Geophysicists
Pages3537-3541
Number of pages5
ISBN (Print)9781622769452
DOIs
StatePublished - Jan 1 2012
EventSociety of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012 - Las Vegas, United States
Duration: Nov 4 2012Nov 9 2012

Other

OtherSociety of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012
CountryUnited States
CityLas Vegas
Period11/4/1211/9/12

All Science Journal Classification (ASJC) codes

  • Geophysics

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    Luo, Y., Tromp, J., Denel, B., & Calandra, H. (2012). 3D elastic migration with topography based on spectral-element and adjoint methods. In Society of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012 (pp. 3537-3541). Society of Exploration Geophysicists. https://doi.org/10.1190/segam2012-0502.1