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Travel times of compressional and shear waves through the super critically CO₂ saturated core sample were measured at six different effective pressures (within the reservoir pressure range). Later on, corresponding compressional and shear wave velocities were calculated (Figure 2.5).

Figure 2.5 Compressional and shear wave velocity vs different effective pressure for super critically saturated core sample.

Figure 2.6 P-wave velocity (experimental and estimated) at different effective pressures.