Full wavefield modeling and inversion for laterally varying media

    Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientific

    Abstract

    Joint migration inversion (JMI) has been implemented with the implicit assumption that the medium parameters are only smoothly laterally varying. We extend JMI such that its modeling algorithm is capable of properly handling strong lateral medium variations. The extension is made by computing propagation and scattering operators using modal expansion. In order to simulate wave propagation in unbounded media, a perfectly matched layer (PML) is implemented. The resulting propagation and scattering operators are not limited by angle of propgation. The extended modeling algorithm is then used for Full Wavefield Migration (FWM) and JMI, which is also extended using a preconditioned conjugate gradient scheme. A numerical example shows that the proposed JMI algorithm is capable of recovering not only the macro-model but also the micro-model. In the numerical example, a velocity anomaly, embedded in a layered model, is recovered with high resolution, along with the accompanying image.
    Original languageEnglish
    Title of host publicationDelphi; The Multiple Estimation and Structural Imaging Project (2015)
    Subtitle of host publicationFrom seismic measurements to rock and pore parameters
    Place of PublicationDelft
    PublisherDelft University of Technology
    Pages191-218
    VolumeXXVII
    ISBN (Print)978-90-73817-64-7
    Publication statusPublished - Jan 2016

    Keywords

    • full wavefiled modeling, JMI

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  • Cite this

    Verschuur, D. J., & Hammad, H. (2016). Full wavefield modeling and inversion for laterally varying media. In Delphi; The Multiple Estimation and Structural Imaging Project (2015): From seismic measurements to rock and pore parameters (Vol. XXVII, pp. 191-218). Delft University of Technology.