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Book Chapter

Torsional Log — The Impossible Dream?

By
J. E. White
J. E. White
Colorado School of Mines
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Published:
January 01, 2000

Abstract

A brief mathematical analysis and some computed waveforms show the advantage of using torsional waves along a borehole to measure shear speed in the formation. These waves are excited by purely torsional loading applied directly to the borehole wall, with no source of excitation in the borehole fluid, and are therefore free of the boreholemode excitations that complicate other forms of acoustic logging. The development of pad-type transducers to generate and detect torsional waves is recommended.

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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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