Time-domain incomplete Gauss-Newton full-waveform inversion of Gulf of Mexico data
Type
Conference PaperKAUST Department
Center for Subsurface Imaging and Fluid ModelingEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2013-08-19Online Publication Date
2013-08-19Print Publication Date
2013-09Permanent link to this record
http://hdl.handle.net/10754/593673
Metadata
Show full item recordAbstract
We apply the incomplete Gauss-Newton full-waveform inversion (TDIGN-FWI) to Gulf of Mexico (GOM) data in the space-time domain. In our application, iterative least-squares reverse-time migration (LSRTM) is used to estimate the model update at each non-linear iteration, and the number of LSRTM iterations is progressively increased after each non-linear iteration. With this method, model updating along deep reflection wavepaths are automatically enhanced, which in turn improves imaging below the reach of diving-waves. The forward and adjoint operators are implemented in the space-time domain to simultaneously invert the data over a range of frequencies. A multiscale approach is used where higher frequencies are down-weighted significantly at early iterations, and gradually included in the inversion. Synthetic data results demonstrate the effectiveness of reconstructing both the high- and low-wavenumber features in the model without relying on diving waves in the inversion. Results with Gulf of Mexico field data show a significantly improved migration image in both the shallow and deep sections.Citation
AlTheyab, A., Wang, X., & Schuster, G. T. (2013). Time-domain incomplete Gauss-Newton full-waveform inversion of Gulf of Mexico data. SEG Technical Program Expanded Abstracts 2013. doi:10.1190/segam2013-1478.1Publisher
Society of Exploration GeophysicistsConference/Event name
SEG Technical Program Expanded Abstracts 2013Additional Links
http://library.seg.org/doi/abs/10.1190/segam2013-1478.1ae974a485f413a2113503eed53cd6c53
10.1190/segam2013-1478.1