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Electrical Resistivity Tomography

This method consists of measuring the electrical resistivity of the ground through the use of a specialised borehole probe. This method allows us to sample the ground surrounding the borehole up to 300 metres in depth. In addition, a cross hole technique can be employed to obtain a 2-D resistivity section between two boreholes.

Applications:

• Resistivity variations down a borehole can be correlated to stratigraphic changes;
• Identify the upper and lower extent of an aquifer;
• Saline intrusion mapping in coastal areas;
• Environmental applications such as contaminant flow mapping, groundwater quality mapping;
• Down hole IP can be used for characterisation of mineral deposits;
• Correlation of resistivity data with other borehole data allows lateral extrapolation (e.g. porosity, permeability, saturation).