Full-wavefield estimation of angle-dependent reflectivity and migration velocity

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    Abstract

    The joint migration inversion (JMI) approach is a very robust and effective method for simultaneously estimating reflectivity (imaging) and the propagation velocity model in a closed-loop process. Being a full waveform method, it utilizes multiple scattering for estimating both types of parameters. Usually, angle-independent reflectivity and velocity are estimated in a ”flip-flop” manner based on gradient descent scheme. Two new features are discussed in this paper. First, simultaneous estimation of angle-dependent reflectivity in the JMI framework is studied, which allows to handle data with strong amplitude versus offset (AVO) variations. Second, a quasi-Newton algorithm was tested to estimate both angle-independent and angle-dependent reflectivity. The method is demonstrated on numerical data, generated by it’s own forward modelling method, as well as data generated using finite difference modeling.
    Original languageEnglish
    Title of host publicationSEG Technical Program Expanded Abstracts 2017
    Subtitle of host publication24-29 September, Houston, USA
    Pages5631-5635
    DOIs
    Publication statusPublished - 25 Sep 2017

    Publication series

    NameSEG Technical Program Expanded Abstracts 2017
    PublisherSEG
    ISSN (Electronic)1949-4645

    Keywords

    • multiples
    • Seismic
    • Velocity
    • Algorithm

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