Abstract
Getting a geologically realistic seismic image still remains a great challenge in foothills exploration. When geological structures are complex, seismic sections show distorted images and become difficult to be interpreted. Seismic processing tools, like time and depth migrations, have been developed to deal with this. Furthermore, when lateral velocity variations are strong, depth migration is definitely required. However, for a correct application of this processing, the construction of a detailed depth model describing lateral and vertical velocity variations is essential.
This study aims at showing that, in triangle zones, the structural features can be better retrieved if the seismic wave propagation through the complex subsurface is better understood. This is obtained by application of a workflow combining direct seismic modelling and depth migration processing. The seismic modelling gives a consistent and accurate velocity model used as input in the seismic depth migration. To illustrate the benefits of this approach, we present a synthetic case study based on a schematic model and a real case study from the frontal part of the Polish Carpathians.
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© 2007 Springer-Verlag Berlin Heidelberg
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Jardin, A., Chaker, R., Krzywiec, P. (2007). Understanding Seismic Propagation through Triangle Zones. In: Lacombe, O., Roure, F., Lavé, J., Vergés, J. (eds) Thrust Belts and Foreland Basins. Frontiers in Earth Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69426-7_3
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DOI: https://doi.org/10.1007/978-3-540-69426-7_3
Publisher Name: Springer, Berlin, Heidelberg
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