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- W2904194006 abstract "This paper introduces a methodology to do a two-dimensional (2D) seismic forward modeling in a computer environment, process and image its synthetic data, and compare the final image to the input model to evaluate the imaging results. Also it discusses the importance of the pre-survey modeling for seismic data acquisition. After a geological model was constructed, a finite difference modeling was successfully performed on the model. The obtained data was processed, and a final image was produced using a pre-stack depth migration. When the input model is compared to the pre-stack depth imaged result, an excellent match is obtained between the two which proved the accuracy of the methodology. The maximum frequency of the data was 50 Hz. Final image was evaluated with respect to different maximum migration frequency. When the migration maximum frequency was lower than the optimum frequency, the image quality deteriorated, the image got fuzzier, the sections of the model with thin layers did not focus well. When the maximum frequency was too high, the final image began losing its quality again, some numerical noise was introduced, the background noise on the image was increased substantially creating artifacts on the image. These imaging tests indicated that the image quality depends on the frequency content. Determining and selecting correct imaging frequency is essential for accurate subsurface illumination. The paper also shows that the synthetic data is useful to test different processing steps, algorithms and software(s). It could also be used for training. Two acquisition geometries were simulated on the model, a surface seismic profile (SSP) and a vertical seismic profile (VSP). P-wave modes were generated only. Relationship between the surface seismic and the vertical seismic was discussed, and also shown how to use both data sets to tie each other for interpreting the surface seismic reflections. However only the surface seismic data was further processed and imaged and evaluated for seismic data acquisition parameters. It should be mentioned and noted that the parameter selection gets a lot more important and complicated for 3D seismic survey designs since the survey size is bigger and it gets more expensive to re-evaluate and re-select the wrong parameters used in 3D surveys." @default.
- W2904194006 created "2018-12-22" @default.
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- W2904194006 date "2018-04-20" @default.
- W2904194006 modified "2023-09-23" @default.
- W2904194006 title "SURVEY DESIGN FOR 2D SEISMIC IMAGING EXERCISE" @default.
- W2904194006 hasPublicationYear "2018" @default.
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