KAUST DepartmentEarth Science and Engineering Program
King Abdullah University of Science and Technology
Physical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Permanent link to this recordhttp://hdl.handle.net/10754/661857
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AbstractExtended waveform inversion provides an effective way to mitigate cycle skipping that usually occurs in conventional full waveform inversion (FWI), resulting in an inaccurate local minimum model. A matching filter between the predicted and observed data can provide an additional degree of freedom to avoid the cycle skipping. We extend the search space to treat the matching filter as an independent variable that we use to bring the compared data within a half cycle to obtain accurate direction of velocity updates. In this case, the objective function with a reasonable penalty parameter has a larger region of convexity compared to conventional FWI. The normalization of the data can bring us an equivalent normalization of the filter, and a more effective convergence. A Marmousi example demonstrates these features.
CitationLi, Y., & Alkhalifah, T. (2019). Matching-Filter Based Extended Full Waveform Inversion. 81st EAGE Conference and Exhibition 2019. doi:10.3997/2214-4609.201901002
SponsorsWe thank Mahesh Kalita and Nabil Masmoudi for their helpful discussions and suggestions. We would like to thank Shaheen supercomputing Laboratory in KAUST for their computational support.
Conference/Event name81st EAGE Conference and Exhibition 2019