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The equivalent measurement is travel time:
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Table 1. Typical values of wave velocities.
Media | P-wave velocity | S-wave velocity | ||
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Rocks |
4,500 | 2,300 |
Casing |
5,850 | 7,800 |
Weight cement |
4,000 | 2,400 |
Conventional cement |
2,800 | 1,900 |
Low-density cement |
1,950 | 1,200 |
Ultra-low-density cement |
1,600 | 1,100 |
Water |
1,500 | 1,000 |
References
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Dvorkin, TIME-AVERAGE EQUATION REVISITED, 2001.pdf Dr. Paul Glover, Petrophysics MSc Course Notes, Sonic Log, Chapter 16.PDF |
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