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

By Biondi B.L.

Seismic photographs are the most important to present day exploration and reservoir tracking. '3D Seismic Imaging provides basic recommendations and state-of-the-art equipment for imaging mirrored image seismic facts. The e-book coherently provides the most parts of seismic imaging - data-acquisition geometry, migration, and pace estimation - by means of exposing the hyperlinks that intertwine them. The e-book emphasizes graphical realizing over theoretical improvement. a number of man made and box info examples illustrate the presentation of mathematical algorithms. the quantity incorporates a DVD that incorporates a subset (C3-narrow-azimuth vintage information set) of the SEG-EAGE salt info set and of the corresponding speed version. The DVD additionally features a entire set of PDF slides that may be used to coach the fabric awarded within the e-book.

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Example text

Shows an in-line section of the interval velocity function in this area. The reflections from the steeply dipping flanks present an insurmountable challenge for the simple NMO+Stack procedure. Furthermore, the presence of a rugose salt top on the right side of the salt crest presents problems also for the NMO+DMO+Stack procedure. 9. 2. 6: In-line section (CMP Y=8 km) of the interval velocity function. 7: In-line section (CMP Y=8 km) of the RMS velocity function. partial-Vrms_inline-y6800-9200-overn [CR,M] is a potential conflict between the NMO velocity required for the flattish events and the NMO velocity required for the dipping events.

Consistent with the results of the previous section, the necessary correction to the NMO velocity is greatest when the trace azimuth is aligned with the structural dip direction, and is null when the trace azimuth is aligned with the structural strike direction. K. Levin (1971); we will follow closely his classical derivation. 3 shows the geometry of a reflection from a dipping plane. We assume that the source is at the origin of the axis, and that the receiver is on the in-line axis x at a distance 2x h from the source.

Cheops-InLine-wix-vwiy-no [NR,M] Chapter 3 Approximations of full prestack migration Ideally, every seismic data set should be imaged with 3-D prestack migration. In practice, however, 3-D prestack migration is applied to a small, though growing, number of surveys. The computational cost of prestack migration is the main rationale for its limited use. Often, less expensive methods can be applied that yield satisfactory results in less time and with less resources. But computational complexity is not the only consideration.

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