An Improved Petrophysical Evaluation of Oomoldic Lansing-Kansas City Formations Utilizing Conductivity and Dielectric Log Measurements.

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J. C. Rasmus,
W. E. Kenyon,
Schlumberger

Abstract

Geologic intervals in the Lansing – Kansas City formation contain varying amounts of oomoldic porosity in addition to intergranular porosity. Using standard resistivity interpretation models can lead to erroneously optimistic results. In this paper, logging measurements of resistivit and Y dielectric permittivity in the invaded zone are used to quantify separately the amount of water in the oomoldic and the intergranular pores. Hydrocarbons indicated by neutron-density and dielectric logs in the invaded zone are assumed to be in the intergranular space; relative permeabilities to oil and water are then computed from the intergranular porosity and saturation. Field examples demonstrate that this technique is successful in predicting oil flow rates.