My PhD Thesis, PDF 3MB - Stanford University

(a) Seismograms. The peak frequency of the source wavelet is 1 KHz.
cased borehole
Vp=1.8km
=1.0
Q=40
9.6m
0.4m
*
Formation:
Vp=4km/s
Vs=2.7km/s
=2.4
Qp=60
Qs=50
Vp=4.5km/s
Vs=2.7km/s
=5.0
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20 m
Vp=6km/s
Vs=3.5km/s
=6.0
(b) Model geometry and parameters.
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Receivers
Figure 3.6 Test on the effect of a velocity anomaly in casing. It can be
seen that the tube wave converts to P and S waves at a velocity anomaly.
30m
30m