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- W2011010259 abstract "In the design of data processing techniques it is often necessary to compute a zero-offset section of a given geological model in order to test the performance of the algorithm. In this work, we compare different approaches to obtain a zero-offset or CMP seismic section from synthetic data. The right but expensive way is to compute a set of common shot seismograms and perform the CMP stacking. As is well known, this procedure attenuates multiple reflections and other undesirable incoherent and coherent noise. A first approximation to the stacked section is the common-offset section calculated with the narest receiver. This approach avoids the velocity analysis and stacking stages. A more cheaper way is to compute the response of the model to a plan wave coming from the surface. The resulting section contains more diffractions and multiple events than the stacked section. Finally, a better approximation is obtained with the so-called exploding reflector technique which is free of multiples and diffractions, although this approach is less efficient in terms of memory storage and computer time. The plane wave and exploding reflector approaches are also compared in the elastic case where an appropriate equation based on constant P and S impedances has been obtained. As expected, both techniques show dissunilar results since the responses depend in this case on the nature (radiation pattern) of the source and the presence of mode conversion in the plan wave seismograms." @default.
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- W2011010259 date "1994-01-01" @default.
- W2011010259 modified "2023-09-23" @default.
- W2011010259 title "Simulation of a CMP seismic section" @default.
- W2011010259 doi "https://doi.org/10.3997/2214-4609.201410042" @default.
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