Electrical Efficiency: A Pore Geometric Model for the Electrical Properties of Rocks


D. C. Herrick, W. D. Kennedy, Mobil

SPWLA 34th Annual Logging Symposium, June 13-16, 1993



INTRODUCTION An understanding of the way pore geometry affects the conductivity of rocks is important for proper in- terpretation of log and laboratory resistivity data when evaluating sedimentary rocks for hydrocarbon potential. The basis for virtually all formation evaluation from logs is the empirical Archie equa- tion. This equation does not have a theoretical ba- sis; rather, it is an ad hoc relationship derived from a graphical analysis of data from clean sandstones.