Time-domain full waveform inversion using the gradient preconditioning based on transmitted waves energy
Type
Conference PaperKAUST Department
Earth Science and Engineering ProgramKing Abdullah University of Science and Technology
Date
2017-05-31Online Publication Date
2017-05-31Print Publication Date
2017-05-31Permanent link to this record
http://hdl.handle.net/10754/624890
Metadata
Show full item recordAbstract
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 GeophysicistsAdditional Links
http://library.seg.org/doi/10.1190/IGC2017-063ae974a485f413a2113503eed53cd6c53
10.1190/igc2017-063