Method and apparatus for anomalous radioactive deposition compensation in spectral gamma ray well logging

摘要

A method and apparatus (108) are disclosed for spectral gamma ray logging of a well borehole (106) to determine elemental concentrations of radioactive materials in subsurface earth formations (100) and in the borehole region. Anomalous radioactive deposition in the borehole region is identified and the effect thereof compensated for in the elemental concentration determinations.