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Abstract: Seismic Reflections Without an Acoustic Impedance Contrast

SHERLOCK, DONALD H., Curtin University of Technology

Summary

Seismic physical modelling experiments with unconsolidated sands and clays have shown that it is possible to record a seismic reflection from a layer boundary where there is only a slight change in material velocity and density. Furthermore, reflections have been recorded from the interface of two sand packages that have different average grain sizes but equal density and velocity. This suggests that it is the combination of the sands at the interface that produces the acoustic impedance contrast required for a reflection, which is an alternative approach rather than the need for separate layering with differing acoustic impedances

AAPG Search and Discovery Article #90937©1998 AAPG Annual Convention and Exhibition, Salt Lake City, Utah