Development of Empirical Equations Relating : Formation Resistivity and Cone Tip Resistance using Sedimentary and Basement Terrains of Nigeria as Case Studies

Vertical Electrical Sounding (VES) and Cone Penetrometer Test (CPT) results were used to investigate bridge/building sites in both sedimentary and basement terrains with a view to establishing empirical equations relating formation resistivity with cone penetrometer resistance. This study concluded that a relationship exist between formation resistivity values and cone penetrometer resistance for sedimentary and basement environments. These relationships have been developed into empirical equations which can be used in the field to convert formation resistivity values to cone tip resistance with a view to assessing the competence of rocks.