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Borehole Geophysical Surveys / +44 (0)1939 210 710

Full Wave Sonic Tool (FWS)

This tool has been specially designed to provide a full wave-form recording of sonic signals and uses fixed spaced transmitter – receivers. The received signals are digitised at fast sampling rate resulting in high resolution data. The data may be processed for P wave velocity (or transit time) and amplitude. Estimates of S wave velocity maybe obtained under suitable formation and borehole conditions.

The P wave velocity log may be user for identifying variations in hardness and porosity.

The log can only be achieved in fluid filled unlined boreholes.


  • Size:
    1.9m x 60mm
  • Weight:
  • Sampling rate:
    Variable (500 samples at 4ms or slower)
  • Resolution:
    16 bit; Record length: min 2ms
  • Frequency:
    16 levels
  • Gain settings:
    23 kHz 16 levels
  • Max. temperature:

Logging Conditions

  • 2 – 9 m / min

Borehole Conditions

  • Diameter 75 to 300mm
  • Water filled
  • Unlined