SEG Technical Program Expanded Abstracts 2013, 2013
ABSTRACT We apply the incomplete Gauss-Newton full-waveform inversion (TDIGN-FWI) to Gulf of Mexi... more ABSTRACT 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. Read More: http://library.seg.org/doi/abs/10.1190/segam2013-1478.1
SEG Technical Program Expanded Abstracts 2004, 2004
Page 1. Enhancing Illumination Coverage of VSP Data by Crosscorrelogram Migration Jianhua Yu and ... more Page 1. Enhancing Illumination Coverage of VSP Data by Crosscorrelogram Migration Jianhua Yu and Gerard T. Schuster; University of Utah Abstract ... Here SEG Int'l Exposition and 74th Annual Meeting * Denver, Colorado * 10-15 October 2004 Page 2. ...
SEG Technical Program Expanded Abstracts 2010, 2010
... (2008) achieved image quality with 2-source shooting similar to that from ... x G(g|x)G(x|s)m... more ... (2008) achieved image quality with 2-source shooting similar to that from ... x G(g|x)G(x|s)m(x)dx, (1) where G(g|x) is the Green's function for a source at x and geo-phone at g. Equation 1 can be rewritten in matrix notation as di = Lim, (2) where L is the forward modeling operator. ...
SEG Technical Program Expanded Abstracts 2013, 2013
ABSTRACT We apply the incomplete Gauss-Newton full-waveform inversion (TDIGN-FWI) to Gulf of Mexi... more ABSTRACT 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. Read More: http://library.seg.org/doi/abs/10.1190/segam2013-1478.1
SEG Technical Program Expanded Abstracts 2004, 2004
Page 1. Enhancing Illumination Coverage of VSP Data by Crosscorrelogram Migration Jianhua Yu and ... more Page 1. Enhancing Illumination Coverage of VSP Data by Crosscorrelogram Migration Jianhua Yu and Gerard T. Schuster; University of Utah Abstract ... Here SEG Int'l Exposition and 74th Annual Meeting * Denver, Colorado * 10-15 October 2004 Page 2. ...
SEG Technical Program Expanded Abstracts 2010, 2010
... (2008) achieved image quality with 2-source shooting similar to that from ... x G(g|x)G(x|s)m... more ... (2008) achieved image quality with 2-source shooting similar to that from ... x G(g|x)G(x|s)m(x)dx, (1) where G(g|x) is the Green's function for a source at x and geo-phone at g. Equation 1 can be rewritten in matrix notation as di = Lim, (2) where L is the forward modeling operator. ...
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