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Book Chapter

Velocity Measurements in Near-Surface Formations*

By
J. E. White
J. E. White
Magnolia Petroleum Company, Field Research Laboratories, Dallas, Texas.
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R. L. Sengbush
R. L. Sengbush
Magnolia Petroleum Company, Field Research Laboratories, Dallas, Texas.
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Published:
January 01, 2000

Abstract

Procedures are described for measuring various seismic velocities at shallow depths in the earth, and examples of the resulting logs are presented. Velocities in Austin chalk and Eagle Ford shale show that these formations are not isotropic, and velocities in loose sand are seen to increase smoothly with depth except for an abrupt increase in compressional speed at the water table. Elastic constants for chalk and shale are computed. A discussion is given of the literature dealing with a packing of spheres as a model for loose sand, and an approximate theory is presented which includes tangential forces between spheres.

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Contents

Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Wave Propagation: Collected Works of J. E. White

J. E. White
J. E. White
Professor Emeritus, Colorado School of Mines
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Society of Exploration Geophysicists
Volume
21
ISBN electronic:
9781560802471
Publication date:
January 01, 2000

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