Title: Seismic crosshole imaging of 2‐D and 3‐D physical elastic models using prestack reverse time migration
Abstract:Crosshole reflection imaging using reverse time migration has been attempted on data sets acquired from twoand three-dimensional physical elastic models. Many crosshole common shot gathers were collec...Crosshole reflection imaging using reverse time migration has been attempted on data sets acquired from twoand three-dimensional physical elastic models. Many crosshole common shot gathers were collected for the models using ultrasonic transducers and a digitizing oscilloscope in the laboratory. Horizontal and vertical crosshole gathers were collected for P-wave source for a 2-D Plexiglas model, and out-of-line horizontal (SH) component common shot gathers ware collected for a SH-wave source for a 3-D concrete model. The SH-SH combination showed the best reflections for the 3-D model because the polarization of the SH-waves was parallel to the reflecting surfaces. Prestack images have been created by finite difference reverse time migration. Final images have been created by stacking many prestack images using different source locations. Post migration stacking of prestack images was helpful in enhancing image quality. The final images of both models clearly showed all reflecting edges and diff ractors.Read More
Publication Year: 1991
Publication Date: 1991-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 1
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