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Modeling—the Forward Method

By
K. R. Kelly
K. R. Kelly
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R. M. Alford
R. M. Alford
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N. D. Whitmore
N. D. Whitmore
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Published:
January 01, 1982

Abstract

Oil and gas deposits are found in porous formations in sedimentary basins. Under normal conditions, the reservoirs occur at locations where the appropriate porous formation is at a higher elevation than the surrounding region. The task of the exploration geophysicist is to locate such occurrences. The most common means of doing this is the proper interpretation of seismic data recorded for the region of interest. As with any physical procedure of this nature, it becomes highly desirable to simulate the data collection process in the laboratory to gain insight by the examination of known situations. This process forms the concept behind seismic modeling for exploration purposes.

The results from modeling of seismic wave propagation are used in many ways by the geophysicist to predict and understand seismic wave phenomena. Uses fall in the broad categories of (1) demonstrating the consistency of interpretation of real data; (2) providing synthetic data sets for testing processing techniques, acquisition parameters, and new ideas; and (3) educating the geophysicist in wave propagation.

Perhaps the most obvious use of modeling is in the generation of synthetic data sections for a proposed model for comparison with the actual data. Although it would be unusual for the synthetic data to match the real data precisely, the interpreter can, by the degree of likeness, increase his confidence in the proposed geologic cross-section. This comparison of model data with field data can be performed at various stages (e.g., common source records, stacked sections, migrated sections) by applying similar processing to

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Contents

Concepts and Techniques in Oil and Gas Exploration

Kamal C. Jain
Kamal C. Jain
Venex Corporation Houston, TX
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Rui J. P. deFigueiredo
Rui J. P. deFigueiredo
Rice University Houston, TX
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Society of Exploration Geophysicists
ISBN electronic:
9781560802778
Publication date:
January 01, 1982

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