IP38, IP38G

The formations surrounding the borehole are subjected to an alternating squarewave voltage applied via the upper and lower injection electrodes.

Following each injection cycle, the resulting potential difference over a section of the formations is analysed as it decays with time. The form of this decay curve is related to the «chargeability» of the formations.

A high chargeability indicates that induced electrochemical potentials are able to develop within the formations as a result of ion transfer between pore fluids and semiconductive metallic mineral grains present within the rocks.

This method is particularly suitable for mining exploration in the context of a disseminated sulphide mineralization. In the hydrogeological domain, it can also provide qualitative information about the permeability of potential aquifer horizons

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IP38 gallery


  • Diameter : 38 mm
  • Length : 2790 mm
  • Max. Temp : 200 bar
  • Pressure : 200 bar

  • Measuring range : SPR 010,000 ohm.m
  • Measuring range : IP ratio A/B (mV/V)

  • Gamma ray sensor: ø25 x 50 mm NaI(Tl) crystal
  • Transport case

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