Robert C. Ransom

What are Archie’s Basic Relationships

What is Meant by the Plot of *R*_{t} versus *S*_{wt}*ϕ*_{t}

Parallel Resistivity Equations Used in Resistivity Interpretation

What is the Formation Resistivity Factor

How is Exponent *n* Related to Exponent *m*

Observations and Conclusions from Figure 10 about Exponent *n*

Are There Limitations to Archie's Relationships Developed in this Model?

**Table of Retrievable Contents:**

**EPILOGUE**

A good well-logging interpretation program is like a double-edged sword. It must cut both ways. The program must find hydrocarbons where they exist and must not imply their existence where they do not exist. The purpose is to be accurate with consistent reliability. Together with interactive computer graphics, the author has used the foregoing logic and fundamentals as the skeletal framework to guide resistivity interpretations for many years in all parts of the world.

**A CLARIFYING CONCEPT OF ARCHIE'S RESISTIVITY RELATIONSHIPS AND PARAMETERS.**

**A MODEL AND DISCUSSION**

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