Technical Report No. 69
THREE-DIMENSIONAL ZONE MODEL LOG INTERPRETATION
Louis J. Shamey, William M. Adams
September 1973
ABSTRACT
To facilitate the interpretation of geophysical electrical well logging data, the apparent resistivity has been calculated in a model in which the experimental situation is approximated by three coaxial cylindrical zones containing the drilling mud, flushed rock, and surrounding rock matrix, respectively. This three-zone model is shown to yield results that differ by as much as 25 percent from the earlier two-zone model calculations.