108 Well seismic surveying and acoustic logging 4.3 Acoustic logging A full waveform acoustic log (Chapter 3) was recorded in the borehole. The borehole is steel cased and poorly cemented. The acoustic tool (see Chapter 3, Figure 3.1 left) is a monopole type flexible tool with a small diameter (50 mm) used in its wide configuration, with a far transmitter-receiver distance (3 to 3.25 m). The sampling interval in depth is 2 cm. The sampling interval in time is 5 μs and the listening time is 5 ms. Figure 4.4 shows the 2 acoustic sections. Figure 4.4 Acoustic sections and cementation logs.
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