Type
Conference PaperKAUST Department
Earth Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Date
2017-03-13Permanent link to this record
http://hdl.handle.net/10754/664681
Metadata
Show full item recordAbstract
The conventional correlation-based objective function for FWI has a limitation: the desired (accurate) solution is not exactly located at the global minimum (or maximum) since the auto-correlation of the observed wavefield has some energy at non-zero time-lags. We propose two optimized correlation-based objective functions incorporating the auto-correlation term. Including this term in the new objective functions as a reference for the cross-correlation to fit locates the desired solution at the global minimum (or maximum). We derive the gradient expressions of the new objective functions using the adjoint-state method, where only two modelling steps are needed to calculate the gradients. The numerical examples show that FWI based on the new objective functions generate good convergent results, whereas the conventional correlation-based FWI does not.Citation
Choi, Y., & Alkhalifah, T. (2016). An Optimized Correlation-based Full Waveform Inversion. 78th EAGE Conference and Exhibition 2016. doi:10.3997/2214-4609.201600642Publisher
EAGE PublicationsConference/Event name
78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking PotentialISBN
9789462821859ae974a485f413a2113503eed53cd6c53
10.3997/2214-4609.201600642