Transient wave forms are presented for a proposed logging tool which is capable of exploiting flexural and torsional waves, as well as more familiar axisymmetric wave types. Torsional waves appear especially promising for investigating invaded zones and other inhomogeneities. The design of a transducer capable of generating and detecting the various waves is described briefly.
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Seismic Wave Propagation: Collected Works of J. E. White
This first chapter sets the stage for the later technical development of Dr. Whit’s career in applied seismics. Experiments, f’wst at the Acoustics Laboratory of the Massachusetts Institute of Technology and later at Mobil Oil and Marathon Oil, provided insight into the general problems of impedance measurements, transduction, filtering, and attenuation. These papers also serve as a bridge to show geophysicists how theft own experiments in seismology naturally interface with (indeed, arose out of) the larger world of sound measurements in air and water. These experiments demonstrate the power of geometrically constrained experiments to allow verification of approximate (and in some cases, exact) theories of sound.