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    Time-domain full waveform inversion using the gradient preconditioning based on transmitted waves energy

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    Type
    Conference Paper
    Authors
    Zhang, Xiao-bo
    Tan, Jun
    Song, Peng
    Li, Jin-shan
    Xia, Dong-ming
    Liu, Zhaolun cc
    KAUST Department
    Earth Science and Engineering Program
    King Abdullah University of Science and Technology
    Date
    2017-05-31
    Online Publication Date
    2017-05-31
    Print Publication Date
    2017-05-31
    Permanent link to this record
    http://hdl.handle.net/10754/624890
    
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    Abstract
    The gradient preconditioning approach based on seismic wave energy can effectively avoid the huge storage consumption in the gradient preconditioning algorithms based on Hessian matrices in time-domain full waveform inversion (FWI), but the accuracy is affected by the energy of reflected waves when strong reflectors are present in velocity model. To address this problem, we propose a gradient preconditioning method, which scales the gradient based on the energy of the “approximated transmitted wavefield” simulated by the nonreflecting acoustic wave equation. The method does not require computing or storing the Hessian matrix or its inverse. Furthermore, it can effectively eliminate the effects caused by geometric diffusion and non-uniformity illumination on gradient. The results of model experiments confirm that the time-domain FWI using the gradient preconditioning based on transmitted waves energy can achieve higher inversion precision for high-velocity body and the deep strata below when compared with using the gradient preconditioning based on seismic waves energy.
    Citation
    Zhang X, Tan J, Song* P, Li J, Xia D, et al. (2017) Time-domain full waveform inversion using the gradient preconditioning based on transmitted waves energy. International Geophysical Conference, Qingdao, China, 17-20 April 2017. Available: http://dx.doi.org/10.1190/igc2017-063.
    Sponsors
    This work was supported by the National Natural Science Foundation of China (41574105).
    Publisher
    Society of Exploration Geophysicists
    Journal
    International Geophysical Conference, Qingdao, China, 17-20 April 2017
    DOI
    10.1190/igc2017-063
    Additional Links
    http://library.seg.org/doi/10.1190/IGC2017-063
    ae974a485f413a2113503eed53cd6c53
    10.1190/igc2017-063
    Scopus Count
    Collections
    Conference Papers; Earth Science and Engineering Program

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