1887
Volume 22, Issue 8
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Steve Morice, product champion, well-driven seismic, WesternGeco, Jean-Claude Puech, borehole seismic co-ordinator, Schlumberger, Europe, CIS and Africa, and Scott Leaney, geophysics advisor, Schlumberger describe how new integrated seismic data processing techniques, combined with a rich borehole geophysics dataset, offer opportunities to significantly enhance 3D seismic preconditioning, prestack imaging and inversion to elastic properties. Meeting the demands for higher resolution, signal-tonoise ratio, positional accuracy and amplitude fidelity from 3D seismic data requires enhanced algorithms and techniques throughout the entire data processing sequence. Well data, in the form of wireline logs and vertical seismic profiles (VSPs), provide unique constraints on key seismic data processing parameters as well as a calibration of the 3D processing sequence in terms of wellto- seismic ties. New methods for the combined analysis of wireline logs, VSPs and prestack seismic data provide invaluable information about seismic velocities (P and S), anelastic attenuation (Q) factors, velocity anisotropy (of various symmetry axes) and multiples. The logs, VSPs and seismic data should be processed and analysed together - reconciling differences due to the basic geophysics of the various measurements, the range of resolution scales, and different source of errors and uncertainties - for a unified and self-consistent borehole and surface-seismic dataset. The derivation of seismic properties from well logs and VSPs is covered extensively in the geophysical literature (see Further Reading below). The purpose of this article is to describe and illustrate how these properties can be applied to address some of the major challenges in conventional 3D seismic data processing.

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/content/journals/0.3997/1365-2397.22.8.25984
2004-08-01
2024-03-28
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  • Article Type: Research Article
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