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    An optimized approach to compute traveltimes in 3D unstructured meshes

    Access Status
    Fulltext not available
    Authors
    Nasr, M.
    Giroux, B.
    Dupuis, Christian
    Date
    2019
    Type
    Conference Paper
    
    Metadata
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    Citation
    Nasr, M. and Giroux, B. and Dupuis, C. 2019. An optimized approach to compute traveltimes in 3D unstructured meshes, pp. 5073-5077.
    Source Title
    2018 SEG International Exposition and Annual Meeting, SEG 2018
    DOI
    10.1190/segam2018-2997918.1
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/74138
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 SEG. We present an optimized method to calculate traveltimes for seismic inversion. It is a hybrid version of the shortest path approach. The main improvements consist in computing traveltimes using the seismic ray paths and using temporary secondary nodes in vicinity of the source. The proposed method is done following two sequential steps. In the first step, traveltimes are computed for all nodes using the modified shortest path method. Ray paths are then traced back for all source-receiver couples and traveltimes for each receiver are updated using nodes along the ray path. Tests have shown that this approach can improve the accuracy by an order of magnitude and save up to a third of the computation time when compared to the standard shortest path algorithm.

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