By Biondo L. Biondi
Seismic pictures are an important to state-of-the-art exploration and reservoir tracking. '3D Seismic Imaging offers basic suggestions and state of the art tools for imaging mirrored image seismic facts. The publication coherently offers the most elements of seismic imaging - data-acquisition geometry, migration, and pace estimation - through exposing the hyperlinks that intertwine them. The ebook emphasizes graphical figuring out over theoretical improvement. numerous artificial and box information examples illustrate the presentation of mathematical algorithms. the quantity features a DVD that incorporates a subset (C3-narrow-azimuth vintage information set) of the SEG-EAGE salt information set and of the corresponding pace version. The DVD additionally incorporates a whole set of PDF slides that may be used to educate the cloth awarded within the e-book. additionally Available:
Geophysics within the Affairs of Mankind - ISBN 1560800879
Seismic True-Amplitude Imaging - ISBN 1560801433
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Additional info for 3D Seismic Imaging
The stacked cube has only three dimensions (time and two midpoints), compared z2ξ +1⁄2xyξ – m1⁄22 . tN = 2 with the five dimensions of prestack data. 2) V the number of data traces is reduced by a factor equivalent to the average data fold. 1 and by setting VN = V: cheaper than full prestack migration by a factor proportional to the average data fold. z2ξ +1⁄2xyξ – m1⁄22 + h2 . 3 defines a hyperboloid of rotation that is to irregularities in the data sampling. 3. Figure 1 shows both these migration that focuses data along the offset axes.
Geometric relationship among θ, α, and η. indd 22 8/16/2006, 2:11 PM Approximations of Full Prestack Migration of Forel and Gardner’s (1988) formulation is that the inexpensive and velocity-dependent NMO operator is applied after the relatively expensive and velocity-independent DMO operator. Therefore, NMO velocity can be updated without reapplying DMO. On the other hand, applying a residual NMO after using Deregowski and Rocca’s (1981) DMO introduces only small errors, if the residual moveout is sufficiently small.
6 km) are imaged much better using depth migration. , 1996). In particular, we will compare the migration results, and we will analyze the Green’s functions corresponding to two representative image-point locations (above and below a salt body) for an Figure 9. 3D time migration of the inline section shown in Figure 8, computed using the true Vrms function. 90. org/ Figure 8. Inline section of the interval-velocity model for the SEG-EAGE salt data set. indd 14 Figure 10. 3D depth migration of the inline section shown in Figure 8, computed using the true interval-velocity function.
3D Seismic Imaging by Biondo L. Biondi