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The equivalent measurement is travel time:
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Table 1. Typical values of wave velocities.
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Rocks | 4500 | 2320 |
Casing | 5860 | 7850 |
Weight cement | 4000 | 2400 |
Conventional cement | 2823 | 1920 |
Low-density cement | 1960 | 1200 |
Ultra-low-density cement | 1600 | 1100 |
Water | 1500 | 1000 |
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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