Gaussian beam velocity tomography based on azimuth-opening angle domain common imaging gathers
نویسندگان
چکیده
منابع مشابه
Angle-domain common-image gathers for migration velocity analysis by wavefield-continuation imaging
We analyze the kinematic properties of offset-domain Common Image Gathers (CIGs) and Angle-Domain CIGs (ADCIGs) computed by wavefield-continuation migration. Our results are valid regardless of whether the CIGs were obtained by using the correct migration velocity. They thus can be used as a theoretical basis for developing Migration Velocity Analysis (MVA) methods that exploit the velocity inf...
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Shotand offset-domain common image gathers encounter problems in complex media. They can place events that come from different points in the subsurface at one subsurface location based on identical arrival times and horizontal slownesses. Angle-domain common image gathers uniquely define ray couples for each point in the subsurface, therefore each event in the data will be associated with only ...
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I present a general methodology for computing Angle-Domain Common Image Gathers (ADCIGs) in conjunction with anisotropic wavefield-continuation migration. The method is based on the transformation of the prestack image from the subsurface-offset domain to the angle domain by use of slant stacks. The processing sequence is the same as for the computation of ADCIGs for the isotropic case, though ...
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Unequal illumination of the subsurface highly impacts the quality of seismic imaging. Different image points of the media have different folds of reflection-angle illumination, which can be caused by irregular acquisition or by wave propagation in complex media. To address this problem, we present a method of stacking angle-domain common-image gathers (ADCIGs), in which we use local similarity ...
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ژورنال
عنوان ژورنال: Journal of Geophysics and Engineering
سال: 2019
ISSN: 1742-2132,1742-2140
DOI: 10.1093/jge/gxz061