ABSTRACT

The in-hole continuous depth-wise measurement of physical properties of geological formations immediately surrounding the borehole is known as borehole geophysical logging and is within the domain of subsurface geophysics. In hard rock groundwater exploration geophysical logging is carried out to recognize different geological formations, the presence of fractured zones and assess their hydrological characteristics. According to Keys (1979), the identification or confirmation, orientation and characterization of fractured zones in terms of their water transmitting capabilities is one of the most important results desired from logging.