Simple, efficient hybrid domain common image gather
- C. Shin (Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea) | T. Ha (National Institute for Mathematical Sciences, Daejeon, Korea) | S. Ko (Shins Geophysics Corp., Seoul, Korea)
- Document ID
- Society of Exploration Geophysicists
- SEG International Exposition and Annual Meeting, 15-20 September, San Antonio, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Exploration Geophysicists
- Reverse time migration, Full-waveform inversion, modeling, Velocity analysis, Frequency-domain
- 6 in the last 30 days
- 7 since 2007
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Given a correct velocity model, high-fidelity subsurface images can be obtained via reverse-time migration (RTM). However, RTM should involve producing common image gathers (CIGs) to assess the velocity model used, thereby fulfilling the prerequisite requirements. This study proposes a novel CIG that spectrally decomposes RTM into frequency-domain (FD) partial images, which dramatically reduces the computation time compared with conventional offset-domain or angle-domain CIG. Without any substantial computation, FDCIG is readily available in FD RTM. This advantage can also be exploited by time-domain techniques using the Fourier transform.
Presentation Date: Monday, September 16, 2019
Session Start Time: 1:50 PM
Presentation Start Time: 3:55 PM
Presentation Type: Oral
|File Size||292 KB||Number of Pages||5|
Baysal,E.,D.,Kosloff, andJ. W. C.,Sherwood,1983,Reverse time migration:Geophysics,48,1514–1524,doi:10.1190/1.1441434.
Kim,Y.,D.-J.,Min, andC.,Shin,2011,Frequency-domain reverse-time migration with source estimation:Geophysics,76,no.2,S41–S49,doi:10.1190/1.3534831.
McMechan,G.A.,1983,Migration by extrapolation of time-dependent boundary values:Geophysics Prospective,31,413–420,doi:10.1111/j.1365-2478.1983.tb01060.x.
Pratt,R. G.,C.,Shin, andG. J.,Hicks,1998,Gauss–Newton and full Newton methods in frequency–space seismic waveform inversion:Geophysical Journal International,133,341–362,doi:10.1046/j.1365-246X.1998.00498.x.
Prucha,M. L.,B. L.,Biondi, andW. W.,Symes,1999,Angle-domain common image gathers by wave-equation migration:69th Annual International Meeting, SEG,Expanded Abstracts,824–827,doi:10.1190/1.1821156.
Shin,C.,S.,Pyun, andJ. B.,Bednar,2007,Comparison of waveform inversion, part 1: conventional wavefield vs logarithmic wavefield:Geophysical Prospective,55,449–464,doi:10.1111/j.1365-2478.2007.00617.x.
Versteeg,R.,1994,The Marmousi experience: Velocity model determination on a synthetic complex data set:The Leading Edge,13,927–936,doi:10.1190/1.1437051.
Whitmore,N. D.,1983,Iterative depth migration by backward time propagation:53rd Annual International Meeting, SEG,Expanded Abstracts,382–385,doi:10.1190/1.1893867.