89 3. Acoustic logging a b Figure 3.6 a and b Example of acoustic data recording. c d Figure 3.6 c and d Example of acoustic data processing - velocity measurement. a): Tool and 3 m constant offset acoustic section. b): Acoustic recordings on 2 receivers, 25 cm apart. c): Compression and frequency velocity logs, d): Shear velocity and Poisson’s ratio logs.
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