The PS suspension logger measures compression wave velocities and formation shear velocities of surrounding rock and soil from within deep uncased boreholes. This is used to determine the physical properties of soil and rock including shear modulus, bulk modulus, compressibility and Poission’s ratio.
The probe of the PS suspension logger has around 100x the output energy of a conventional borehole sonic. This makes it highly effective in soft soils and other attenuating formations where conventional full-waveform sonics often perform poorly.
This is the only method that obtains both P- and S-wave velocity data reliably in single holes at depths greater than 60 metres and has been used down to 600 metres.
Data is in high resolution (typically 1m) and can therefore be used to resolve thin layers that can have a dramatic effect on surface response.
Acquired data is recorded in the industry standard SEG2 format and is processed using specialized software, allowing users to conduct a series of analysis tasks.