Surface to Borehole Radial Electrical Resistivity Measurement Using L-Shape Array

The different resistivity techniques are being extensively used in environmental and civil engineering to investigate the subsurface conditions. However, the application of the known ground resistivity techniques is subjected to the space availability in the investigated areas. Therefore, in order to avoid the space restriction, geophysicists use the borehole tomography in two or more wells. This approach requires more time and adds cost to survey execution. In this work, the use of the L-Shape resistivity array is being proposed as borehole to surface resistivity measurement technique. The procedure is to put the potential electrodes in the well and to keep the current electrodes on the surface and to conducted the measurements with different spacing in a radial manner around the borehole.