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  Geoscientist's Toolkit - Resistivity

General Instructions: Fill in boxes with appropriate numbers. Constants in white boxes, variables (from log measurements and/or calculations) in shaded boxes and press the ENTER key. You must have Office 2000 or higher in order to view this page correctly.

For the Texas Formation Water Database, click here  

For definitions, charts, and other related information, click here  

Formulas from Dewan, "Essentials of Modern Open-Hole Log Interpretation" (1983)
and from Hilchie, "Old Electrical Log Interpretation" (1979)