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:**

**REFERENCES**

Archie, G. E., 1942, The Electrical Resistivity Log as an Aid in Determining Some Reservoir Characteristics, *Trans*., *AIME*, vol. 146.

Atkins, E. R., and Smith, G. H., 1961, The Significance of Particle Shape in Formation Resistivity Factor - Porosity Relationships, *Journal of Petroleum Technology*, *AIME*, vol. 13.

Best, D. L., Gardner, J. S., and Dumanoir, J. L., 1980, A computer-processed wellsite log computation, SPE paper 9039, Rocky Mountain Meeting Proceedings, *Society of Petroleum Engineers*.

Fricke, H., 1931, The Electric Conductivity and Capacity of Disperse Systems, *Physics*, August.

Keller, G. V., 1953, Effect of Wettability on the Electrical Resistivity of Sand, *Oil and Gas Journal*, Jan. 5; 51: 62-65.

Levorsen, A. I., 1967, Geology of Petroleum, 2^{nd} edition, *W. H. Freeman*, San Francisco

Pirson, S. J., 1947, Factors Which Affect True Formation Resistivity, *Oil and Gas Journal*, November 1.

Ransom, Robert C., 1974, The Bulk Volume Water Concept of Resistivity Well Log Interpretation. A Theory Based on a New Reservoir Rock Resistivity Model, *The Log Analyst, SPWLA* (Jan.-Feb.)

Ransom, Robert C., 1977, Methods Based on Density and Neutron Well- Logging Responses to Distinguish Characteristics of Shaly Sandstone Reservoir Rock, *The Log Analyst, SPWLA* (May-June)

Ransom, Robert C., 1984, A Contribution to a Better Understanding of the Modified Archie Formation-Resistivity-Factor Relationship, *The Log Analyst, SPWLA* (March-April)

Ransom, Robert C., 1995, Practical Formation Evaluation, *John Wiley & Sons, Inc.*, New York.

Schlumberger, 1989, *Log Interpretation Principals/Applications*.

Sweeney, S. A. and Jennings, H. Y., 1960, The Electrical Resistivity of Preferentially Water-Wet and Preferentially Oil-Wet Carbonate Rocks, *Producers Monthly*, 24, 29-32.

Worthington, P. F., 2004, Characterization of the Intrinsic Porosity Exponent through Dual-salinity Measurements of Electrical Conductivity, *Petrophysics, SPWLA*, (November-December, pp. 499- 516)

Wyllie, M. R. J. and Gregory, A. R.; 1952, Formation Factors of Unconsolidated Porous Media; Influence of Particle Shape and Effect of Cementation; Paper Number 223-G presented at Fall Meeting of the Petroleum Branch, AIME, held at Houston, TX., October, 1-3.

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

**A MODEL AND DISCUSSION**

*Within the text, clicking on the bold terms **FIGURE (*)** and **APPENDIX (*)** will take you to the specific page of interest. Use your browser's back button to return to your previous page.*