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Resistivity Logs & Archie's Equation

Inside this lesson
  • Explain why hydrocarbons raise formation resistivity
  • Define the formation factor $F = a/\phi^m$ and $R_o = F \cdot R_w$
  • Apply Archie's equation and its $a=1, m=n=2$ reduction
  • Compute $S_w$ and hydrocarbon saturation from a worked example

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Educational content covering topics typical of an undergraduate petroleum-engineering curriculum. Not a substitute for accredited coursework, and not suitable for real well, reservoir, or field decisions without review by a licensed professional engineer. Well-control content is conceptual awareness only and is not IWCF/IADC training. References to reserves or resource classifications are descriptive context only, not regulatory disclosure or booking guidance.