Ever wanted accurate compressional and shear wave arrival times in uncompacted near surface sediments? The borehole P-S seismic suspension logging probe has been designed for this purpose and can provide these measurements from inside PVC casing.
By themselves, the compressional and shear wave arrivals time may not seem important properties but together and with density measurements, elastic rock properties such as Poisson’s Ratio, Shear Modulus, Bulk Modulus and Bulk Compressibility can be calculated.
Previously, these parameters could be calculated using the fullwave sonic probe but in uncompacted, near surface sediments the shear wave was very difficult to pick. Also, the fullwave sonic needs openhole conditions in the borehole.