Ultrasonic Measurements of rock samples from Decatur project

Using ultrasonic methods, we measured the wave velocities (three P-wave velocities and two S-wave velocities) of dry cylindrical core plugs (sedimentary rock samples) collected from the Decatur project site, specifically from the Eau Claire, Mt. Simon, and Argenta formations. We also investigated the presence of elastic anisotropy in each sample and analyzed how the anisotropy parameters evolved as the confining pressure was gradually increased from 5 MPa to approximately 70 MPa.