Scattering and dip angle decomposition based on subsurface offset extended wave-equation migration
نویسندگان
چکیده
منابع مشابه
Scattering and dip angle decomposition based on subsurface offset extended wave-equation migration
An angle-dependent reflection coefficient is recovered by seismic migration in the angle domain. We have developed a postmigration technique for computing scattering and dip angle common-image gathers (CIGs) from seismic images, extended by the subsurface offset, based on wave-equation migration methods. Our methodology suggests a system of Radon transform operators by introducing local transfo...
متن کاملScattering and dip angle decomposition in relation with subsurface offset extended wave-equation migration
An angle-dependent reflection coefficient is recovered by seismic migration in the angle-domain. We propose a post-migration technique for computing scattering and dip angle common-image gathers (CIGs) from seismic images, extended by the subsurface offset, in relation with wave-equation migration methods. Our methodology suggests a system of Radon transform operators by introducing local trans...
متن کاملDip-angle decomposition in relation with subsurface offset extended wave-equation migration
Our proposal provides post-migration techniques for computing angle-domain common-image gathers (CIGs) from seismic images, extended by the subsurface offset, in relation with wave-equation migration methods. In addition to the commonly used decomposition of the scattering-angles, we associate the wave-equation migration with dip-domain image gathers as well. Our methodology suggests a system o...
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Angle domain common image gathers offer advantages for subsurface image analysis in complex media. We compare two angle decomposition methods using extended images and wave propagation directions based on Poynting vectors of the source and receiver wavefields. We evaluate the ability of each method to produce accurate and efficient angle gathers for wave-equation migration in the presence of mu...
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Wavefield-based migration velocity analysis using the semblance principle requires computation of images in an extended space in which we can evaluate the imaging consistency as a function of overlapping experiments. Usual industry practice is to assemble those seismic images in common-image-gathers (CIG) which represent reflectivity as a function depth and extensions, e.g. reflection angles. W...
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ژورنال
عنوان ژورنال: GEOPHYSICS
سال: 2016
ISSN: 0016-8033,1942-2156
DOI: 10.1190/geo2015-0528.1