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From Andes to Zagros - Variations in Structural Styles and Seismic Data from Two Processors’ Perspectives
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 77th EAGE Conference and Exhibition - Workshops, Jun 2015, Volume 2015, p.1 - 5
Abstract
An overview of data examples from a variety of settings illustrates the similarities and differences in structural style, velocity structure, and acquisition conditions. We have observed that younger rocks typically show lower velocities and the lower compressibility of these strata results in velocities more sensitive to depth of burial. Velocity gradients need more testing in younger basins with lower velocity rocks. Another observation is that more topsoil with wetter surface conditions appear to offer better coupling for seismic sources and receivers, which could explain why we see better signal-to-noise ratios on seismic data from rainforest versus desert environments. Desert outcrops may read like a geology textbook, but visual clarity at the surface comes at a cost of clarity in the subsurface.