About the Author...
Robert C. Ransom is a retired consultant in formation evaluation through the use of well-log analysis. Formerly he was Senior Research Associate in Formation Evaluation for UNOCAL Corporation's research center at Brea, California. He graduated in 1951 with a B. E. Degree in Chemical Engineering from the School of Engineering at Yale University. He is an Honorary Member of the Society of Petrophysicists and Well Log Analysts (SPWLA). He joined Schlumberger Well Surveying Corp. in 1951 and was on leave of absence to serve with the Chemical Corps of the U.S. Army during the Korean War. He left Schlumberger to research and develop well-log analysis methods at UNOCAL's research center and to work with the field department on problems of practical importance. Bob compiled and edited both the 1st and 2nd editions of the SPWLA Glossary. He has authored and published a number of technical papers, a textbook, and an Interpretive Groundwater Glossary at
He taught formation evaluation at the graduate level in the Petroleum Engineering Department of the University of Southern California for nearly a decade prior to his move from California to Colorado. He and his wife of over 60 years have retired to their home in the countryside outside of the town of Elizabeth, Colorado, USA.
He may be contacted at: firstname.lastname@example.org
Robert C. Ransom
Table of Retrievable Contents:
A CLARIFYING CONCEPT OF ARCHIE'S RESISTIVITY RELATIONSHIPS AND PARAMETERS.
A MODEL AND DISCUSSION