Actas de congresos
Obliquity Correction For Reverse Time Migration
Registro en:
Seg Technical Program Expanded Abstracts. , v. 27, n. 1, p. 2371 - 2375, 2008.
10523812
10.1190/1.3059355
2-s2.0-58049177265
Autor
Neto F.A.S.
Costa J.C.
Rian M.
Schleicher J.
Novais A.
Institución
Resumen
The quality of seismic images obtained by reverse time migration strongly depend on the employed image condition. We propose a new imaging condition, which is motivated by stationary phase analysis of the classical cross-correlation imaging condition. Its implementation requires the Poynting vector of the source and receiver wavefields at the imaging point. An obliquity correction is added to compensate for the reflector dip effect on amplitudes of reverse time migration. Numerical experiments show that using an imaging condition with obliquity compensation improves reverse time migration by reducing backscattering artifacts and improving the illumination compensation. 27 1 2371 2375 Baysal, E., Kosloff, D., Sherwood, W., Reverse-time migration (1983) Geophysics, 11, pp. 1514-1524. , gpy GPYSA7 0016-8033 Geophysics Biondi, B., 3D seismic imaging (2006) SEG Bleistein, N., Handelson, R.A., Asymptotic expansions of integrals (1975), DoverBracewell, R., The Fourier transforms and its applications (1999), McGraw-Hill ScienceCerveny, V., Seismic ray theory (2001), CambridgeClaerbout, J., Imaging the Earth's interior (1985), BlackwellFletcher, R.F., Fowler, P., Kitchenside, P., Albertin, U., Suppressing artifacts in prestack reverse time migration (2005) 75th Annual International Meeting, SEG, pp. 2049-2051. , Expanded Abstracts Guitton, A., Kaelin, B., Biondi, B., Least-squares attenuation of reverse-time-migration artifacts (2007) Geophysics, pp. S19-S23 Haney, M.M., Bartel, L.C., Aldridge, D.F., Symons, N.P., Insight into the output of reverse-time migration: What do amplitudes mean? (2005) 75th Annual International Meeting, SEG, pp. 1950-1953. , Expanded Abstracts Kaelin, B., Guitton, A., Imaging condition for reverse time migration (2006) 76th Annual International Meeting, SEG, pp. 2594-2597. , Expanded Abstracts Kosloff, D., Baysal, E., Migration with the full wave equation (1983) Geophysics, pp. 677-687 McMechan, G.A., Migration by extrapolation of time-dependent boundary values (1983) Geophysical Prospecting, 31, pp. 413-420. , 8uc GPPRAR 0016-8025 Geophys. Prospect Tessmer, E., Full-wave prestack reverse-time migration by the Fourier method and comparisons with Kirchhoff depth migration (2003) Annual WIT Report, 7, pp. 163-176 Valenciano, A., Biondi, B., 2D deconvolution imaging condition for shot-profile migration (2003) 73rd Annual International Meeting, SEG, pp. 2431-2433. , Expanded Abstracts Versteeg, R., Grau, G., Practical aspects of seismic data inversion, the Marmousi experience (1990) 52nd Annual International Conference and Exhibition, EAEG, pp. 1-194. , Extended Abstracts Yoon, K., Marfurt, K., Reverse-time migration using the Poynting vector (2006) Exploration Geophysics, 37, pp. 102-107. , 5ht EXGEEF 0812-3985 Explor. Geophys. (Sydney)