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Geo performs geophysical borehole logging as part of geotechnical and environmental investigations and for water supply surveys.

Borehole logging is a fast and effective method for sourcing useful information, in both new and existing boreholes, about the soil/rock characteristics, water inflow and technical structure of borings. Geophysical borehole logging is performed by lowering one or more probes into the borehole. Various physical parameters are measured, which by interpreting the data can provide supplementary knowledge of the underground.

When geophysical borehole logging is performed in new borings, the investigation provides an opportunity to optimise the boring. In older borings, in which information regarding the soil layers of the boring and the technical structure of the boring is often incomplete, the method provides the opportunity to gather this information. Logging is also applicable for controlling filter placement and bentonite plugs in already developed borings.


Geo performs borehole logging for surveying:

  • Borehole diameter.
  • Natural gamma radiation.
  • Density.
  • Porosity.
  • Resistivity.
  • Induction
  • Temperature / conductivity of liquid in boreholes.
  • Flow rates.
  • Optical Televiewer.
  • Acoustic Televiewer.
  • Heat Pulse for sampling of level specific water in wells.