Earth imaging in depth exercises
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| Series | Investigations in Geophysics |
|---|---|
| Author | Öz Yilmaz |
| DOI | http://dx.doi.org/10.1190/1.9781560801580 |
| ISBN | ISBN 978-1-56080-094-1 |
| Store | SEG Online Store |
Exercise 8-1. Consider the zero-offset x − t section depicted in Figure 8.E-1. Using the velocity-depth model in the same figure, sketch the depth-migrated x − z section.
Exercise 8-2. Identify the prominent sideswipe energy on Lines I-181 and I-151 in Figure 8.4-2 (right column).
Exercise 8-3. In areas with complex overburden, which one is more important — 3-D poststack depth migration or 2-D prestack depth migration?
Exercise 8-4. How would the geometry of the subsalt target reflectors labeled in yellow in Figure 8.E-2 behave on a section from an image volume created by 3-D poststack depth migration?
Figure 8.E-1 (a) A zero-offset section containing all-zero traces except the one shown, which has a single isolated wavelet; (b) the velocity-depth model for depth migration; (c) the x − z plane associated with the depth-migrated section. See Exercise 8-1.
Figure 8.4-2 Velocity-depth model (left column) and cross-sections of the zero-offset 3-D synthetic wavefield (right column) for a circularly symmetric salt dome. The base map is shown in Figure 8.4-1.
See also
- Introduction to earth imaging in depth
- Layer replacement
- 2-D poststack depth migration
- 2-D prestack depth migration
- 3-D poststack depth migration
- 3-D prestack depth migration
- Diffraction and ray theory for wave propagation
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