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Book Chapter

Stratigraphic and Structural Interpretations Using Diffraction Seismograms

By
Richard K. Snavely
Richard K. Snavely
Dept. of Geology and Geophysics, University of New Orleans, New Orleans, LA 70148.
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A. K. M. Sarwar
A. K. M. Sarwar
Dept. of Geology and Geophysics, University of New Orleans, New Orleans, LA 70148.
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Published:
January 01, 2016

Abstract

A two dimensional seismic diffraction modeling method has been applied to an east-west cross-section across Bay Marchand Blocks 2-4 located one and a quarter miles north of the Bay Marchand/South Timbalier area boundary. A twenty layer geologic depth model has been constructed from the correlation of SP-induction and sonic well logs. Each layer has been assigned a velocity determined from the corresponding sonic logs and a density approximated from Gardner’s rule. A synthetic seismogram has been generated from the geologic depth model using a diffraction modeling computer program.

Both the synthetic seismogram and the seismic field trace illustrate a piercement salt dome, graben faulting, pinchout reflectors and salt truncation reflectors. The reflector shapes, the shadow zone due to faulting and the diffraction pattern which outlines the boundary of the salt dome on the synthetic seismic section are similar to those on the field seismic section.

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Contents

Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Diffraction

Kamil Klem-Musatov
Kamil Klem-Musatov
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Henning Hoeber
Henning Hoeber
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Michael Pelissier
Michael Pelissier
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Tijmen Jan Moser
Tijmen Jan Moser
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Society of Exploration Geophysicists
Volume
30
ISBN electronic:
9781560803188
Publication date:
January 01, 2016

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