Sams, Mark; Goldberg, David (1990): The validity of Q estimates from borehole data using spectral ratios. Society of Exploration Geophysicists, Tulsa, OK, United States, Geophysics, 55 (1), 97-101, georefid:1989-081247

Abstract:
The measurement from borehole sonic data of Q, the acoustic attenuation coefficient of an earth section, can be achieved in three ways: forward modeling (Chuen and Toksoez, 1981), spectral ratios (Gladwin and Stacey, 1974), and inversion (Cheng et al., 1986). The spectral-ratio technique has been applied to real data (Goldberg et al., 1985) but is unstable and not very reliable. Experiments have shown that the spectral-ratio technique applied to waveforms gives Q estimates which are lower than those measured from cores in the laboratory (Goldberg and Zinszner, 1989). We investigate this phenomenon using synthetic and real data.
Coverage:
West: -68.0327 East: -68.0326 North: 25.0207 South: 25.0205
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Expedition: 102
Site: 102-418
Expedition: 52
Site: 52-418
Expedition: 53
Site: 53-418
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