Velocity Model Building and Seismic Imaging in a Complex Structural Setting in the Rocky Mountains.
Date
2013-05-17
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Abstract
A 2D seismic line located in the Foothills Thrust fold belt in Northeast British Columbia was reprocessed and interpreted for this thesis. The area is topographically difficult and structurally complex with surface carbonates, velocity inversions and steeply dipping structures associated with thrust faults. Data quality recorded has a low S/R, therefore the seismic processing called for strong noise suppression. Two different processing sequences were developed in order to achieve an improved image. Kirchhoff migration was chosen for its parameter testing flexibility and computational efficiency. Kirchhoff PSTM produced an improved subsurface image, showing better focus and continuous reflection events. PSDM was done via a Kirchhoff code and a PSDM velocity model was manually interpreted and tested using externally pre-processed data. The velocity model building required the integration and tying of geophysical and geological data. PSDM showed some reflection coherence. The best PSTM outcome was similar to the best PSDM outcome.
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Geology, Geophysics
Citation
Mirabella, C. P. (2013). Velocity Model Building and Seismic Imaging in a Complex Structural Setting in the Rocky Mountains. (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/28637