Publication History: This article is based on Chapter 8 of "The Log Analysis Handbook" by E. R. Crain, P.Eng., published by Pennwell Books 1986  Updated 2004, 2015, 2020. This webpage version is the copyrighted intellectual property of the author.

Do not copy or distribute in any form without explicit permission.

  META/LOG "RW" SPREADSHEET -- Water Resistivity Calculator
This spreadsheet calculates RW at any temperature using 5 different methods
  1. Salinity in ppm
  2. Spontaneous Potential
  3. Water Zone (Rwa, R0 Method)
  4. Water Catalog
  5. Minimum of Above

Includes calculation of formation temperature.
You can turn off any inappropriate method.

Download this spreadsheet:
  Calculate water resistivity (RW), 5 methods,


Sample of "META/RW" for calculating water resistivity from various methods.


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