Natural Gamma Radiation

This stratigraphic identification tool is primarily used to differentiate between sandstone and shale around the borehole, although can be used for radioactive material investigations. This tool measures the natural radiation, which is present in most rocks. In areas with unconsolidated materials, this is an excellent sand/clay discrimination tool.  Frequently used when mud-rotary drilling methods are employed, this tool permits the identification of clean sands and aquitards for well screen placement.