Prestack Migration/Imaging Using Synthetic Beam Sources and Plane Sources |
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| Authors: | Wu Ru-Shan Chen Ling Wang Yongzhong |
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| Institution: | (1) Modeling and Imaging Laboratory, IGPP, University of California, Santa Cruz, CA 95064, USA |
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| Abstract: | The principle and procedures of beam-source and plane-source synthesis for wave-equation based imaging/migration are introduced and tested with Gabor-Daubechies and local-cosine beamlet prestack migration. Plane-source synthesis and imaging are treated as a special case of approximation to the beam-source synthesis and imaging. Beam sources with properly selected windows provide both space and direction localizations for illumination and are very flexible for target-oriented migration using wave-theory based methods. On the other hand, plane-source imaging can increase the computation efficiency of depth migration significantly, up to 5-10 times for the SEG-EAGE 2D salt model and Marmousi model, while maintains the image quality similar or comparable to that of point-source (common-shot) imaging/migration. |
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| Keywords: | beam source plane source areal shot beamlet migration prestack migration |
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