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Book Chapter

Contributions of GeoSeismic Modeling

January 01, 1979


Seismic modeling is in fact the successor to the synthetic seismogram and is also the vehicle by which seismic correlations with geology may be verified. Although publications describing modeling techniques and applications are few in number (see Taner, Cook and Neide11 (1970) and Shah (1973), the technology has reached a rather sophisticated level. The paper by Neidel1 (1975) describes some of the more advanced considerations and limitations associated with the use of seismic modeling.

Unlike the synthetic seismogram, the true seismic model accepts a description of a subsurface in terms of its geometry and acoustic parameters including the usual velocity, density and an attenuation factor. In two-dimensional modeling systems which view the subsurface as having perfect lateral continuity and homogeneity outside of the plane in which the subsurface is described, geometry of virtually any complexity may be treated. Further, the seismic parameters are permitted to vary both horizontally and laterally to represent lithologic transitions and similar subtle stratigraphic effects.

In our introductory discussion we briefly viewed simple modeling illustrations using ray trace approaches and wave theory. These portrayed modeling as a tool for overcoming geometric effects on the seismic section which might obscure stratigraphic objectives and also for treating diffractions, another member of the class of seismic events which do not simply relate to lithologic contrasts. Here we wish to look at modeling from a more advanced viewpoint. In particular we will use it to develop insights into the spatial resolution inherent in seismic data and the very origin of

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AAPG Continuing Education Course Notes Series

Stratigraphic Modeling and Interpretation: Geophysical Principles and Techniques

Norman S. Neidell
Norman S. Neidell
Zenith Exploration Company Houston, Texas
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American Association of Petroleum Geologists
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Publication date:
January 01, 1979




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