CONCLUSION

Lab measurements of rock properties can be important in integrating borehole logging data and surface seismic data in order to map changes in lithology, pore geometry or fluid saturation in a reservoir. We made measurements on lab core samples of dry and saturated Massillon sandstone. We obtained the following dry rock velocity values: _dry = 2918 $\pm$ 32 m/s and _dry = 1731 $\pm$ 99 m/s, and water-saturated rock velocities of _wet = 3380 $\pm$ 78 m/s and _wet = 1744 $\pm$ 201 m/s, respectively. We also tested Gassmann's prediction of saturated velocity from the dry rock measurements, and found that Gassmann's relation gave significantly incorrect and potentially misleading results, on the order of 20% less than lab measured saturated velocities.