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Acoustical Logging

January 01, 2000


As the characteristics of shear-waves became better known, the need for sources and detectors was clear. This led to the invention of a dipole logging tool. This provided a companion to the monopole. There seemed to be no commercial market at that time for the dipole tool, and it was some years before a tool was built that would operate under the severe conditions encountered in oil wells. Mathematical analysis continued leading to such a variety of vibrational modes that it was dubbed “the Hula log.” With the source and detector mounted in the same logging tool, the waves are strongest near the borehole. Each combination of source type and detector type gives different information.

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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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January 01, 2000




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