Download 3D Seismic Imaging by Biondo L. Biondi PDF

By Biondo L. Biondi

Seismic photos are an important to contemporary exploration and reservoir tracking. '3D Seismic Imaging provides primary suggestions and state of the art equipment for imaging mirrored image seismic information. The e-book coherently offers the most elements of seismic imaging - data-acquisition geometry, migration, and speed estimation - through exposing the hyperlinks that intertwine them. The publication emphasizes graphical realizing over theoretical improvement. a number of artificial and box info examples illustrate the presentation of mathematical algorithms. the amount encompasses a DVD that incorporates a subset (C3-narrow-azimuth vintage facts set) of the SEG-EAGE salt facts set and of the corresponding speed version. The DVD additionally incorporates a entire set of PDF slides that may be used to educate the cloth awarded within the publication. additionally Available:

Geophysics within the Affairs of Mankind - ISBN 1560800879
Seismic True-Amplitude Imaging - ISBN 1560801433

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Example text

AMO has been derived both as a cascade of DMO and inverse DMO (Ronen, 1987; Canning and Gardner, 1992) and as the cascade of full 3D prestack constant-velocity migration and its inverse. AMO is applied after NMO, thus accounting for velocity heterogeneities, at least to first order. Azimuth moveout is not a single-trace to single-trace transformation; rather, it is a partial-migration operator that moves events across midpoints according to their dip. Its impulse response is a saddle in the time-midpoint domain.

Indd 17 8/16/2006, 5:34 PM 18 3D Seismic Imaging Schneider, W. , 1978, Integral formulation for migration in two dimensions and three dimensions: Geophysics, 43, 49–76. Vidale, J. , 1990, Finite-difference calculation of traveltimes in three dimensions: Geophysics, 55, 521–526. 90. indd 18 8/16/2006, 5:34 PM Chapter 3 Approximations of Full Prestack Migration Introduction Finally, the last part of the chapter presents the concept of two-pass migration. Two-pass migrations achieve computational efficiency by decoupling the migration process along the two horizontal coordinate axes; they are typical examples of full-separation methods.

Cohen and Bleistein (1979) did much of the pioneering work and derived the solution for simple background media (constant and horizontally layered media). Beylkin (1985) defined the problem as the inversion of a Radon transform, independent of the particular shape z2ξ +1⁄2xyξ – m1⁄22 . 5) V generalization of Cohen and Bleistein’s results to complex media. Schleicher et al. (1993) reached results equivalent to Figure 1 shows the zero-offset hyperboloid in a 3D perthose of the previous authors, but their derivation was based spective.

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