3D Seismic Imaging by Biondo L. Biondi PDF

By Biondo L. Biondi

ISBN-10: 093183046X

ISBN-13: 9780931830464

ISBN-10: 1560801379

ISBN-13: 9781560801375

Seismic photographs are the most important to trendy exploration and reservoir tracking. '3D Seismic Imaging provides primary innovations and state of the art equipment for imaging mirrored image seismic info. The publication coherently offers the most elements of seismic imaging - data-acquisition geometry, migration, and speed estimation - by means of exposing the hyperlinks that intertwine them. The e-book emphasizes graphical knowing over theoretical improvement. numerous man made and box information examples illustrate the presentation of mathematical algorithms. the amount contains a DVD that includes a subset (C3-narrow-azimuth vintage info set) of the SEG-EAGE salt facts set and of the corresponding pace version. The DVD additionally contains a entire set of PDF slides that may be used to coach the cloth provided within the publication. additionally Available:

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

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Extra info for 3D Seismic Imaging

Example text

The constant κPreKir in front of the cost function depends on the migration type. For depth migration it can, in first approximation, absorb the cost of computing and interpolating time delays. Typically, κPreKir ranges between 5 and 30 flop (floating point operations). 12) which grows in proportion only to the size of the area covered by the image, not in proportion to the area covered by the survey. For our example, limiting the aperture to an angle α = 45° would reduce the total computational time by about a factor of 4, to a more manageable six days.

In reality, the migration aperture seldom is the same in the inline direction as in the crossline direction. Often, the subsurface structure has a predominant dip direction, and a priori knowledge of this structural directivity can be exploited to reduce the cost of imaging by migrating the data by use of a smaller aperture in the crossline direction (αy) than in the inline direction (αx). However, as the following examples illustrate, such a practice may lead to incomplete imaging of all reflectors.

The diameter of this circle is directly proportional to (zξ × tanα), where α is the aperture of the cone, as shown in the figure. 11 becomes the more favorable PreKir ∝ κPreKir × (Nzξ × Nxξ × Nyξ) × [(Nzξ × tanα)2 × π /3 × Nf)], where (Nzξ, Nxξ, Nyξ) are the dimensions of the image space and (Nxm, Nym, Nf) are the dimensions of the data space, with Nf equal to the nominal fold of the survey. The constant κPreKir in front of the cost function depends on the migration type. For depth migration it can, in first approximation, absorb the cost of computing and interpolating time delays.

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3D Seismic Imaging by Biondo L. Biondi

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