Download 3-D seismic imaging by Biondi B.L. PDF

By Biondi B.L.

Seismic photographs are an important to modern-day exploration and reservoir tracking. '3D Seismic Imaging offers primary techniques and state of the art tools for imaging mirrored image seismic facts. The ebook coherently provides the most parts of seismic imaging - data-acquisition geometry, migration, and pace estimation - through exposing the hyperlinks that intertwine them. The ebook emphasizes graphical knowing over theoretical improvement. numerous artificial and box facts examples illustrate the presentation of mathematical algorithms. the quantity contains a DVD that includes a subset (C3-narrow-azimuth vintage info set) of the SEG-EAGE salt facts set and of the corresponding speed version. The DVD additionally encompasses a whole set of PDF slides that may be used to coach the fabric awarded within the booklet.

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Extra resources for 3-D seismic imaging

Example text

The contour lines identify circles with equal time delays. The cross at the apex of the hyperboloid identifies the image point corresponding to the summation surface. The time of the cross is equivalent to the two-way traveltime τξ = 2z ξ /V . 2: Constant-offset summation surface defined in the data space. The vertical axis is the time axis; the horizontal axes are the midpoint axes. The contour lines identify ellipses with equal time delays. The cross identifies the image point corresponding to the summation surface.

14 the analytical hyperbolic trajectory (yellow on blue line) substantially differs form the “true” Green function computed using wavefield modeling. In contrast, the time delay function computed by numerically solving the Eikonal equation (yellow on red line) overlaps the ‘true” Green function almost perfectly. 3 Computational cost of prestack migration The computational cost of 3-D prestack migration can be large. There is a clear incentive to reduce the computational cost, especially considering that in complex media several migrations are often necessary to converge to an acceptable velocity model.

11: Source and receiver locations for one shot gather of a button-patch land acquisition geometry from Wyoming. Receivers are represented by dots and the source is represented by an asterisk. geom-RS-arco [CR] 24 CHAPTER 1. 3-D DATA GEOMETRIES (a trace pair with the respective source and receiver locations exchanged) provide equivalent sampling for prestack imaging operators. This comparison is only qualitative, because other factors such as propagation velocity, target depth, and signal frequency should be considered when the sampling criteria of seismic reflections are determined.

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