Impacts of the pore- and petro-fabrics on porosity exponent and lithology factor of Archie's equation for carbonate rocks

摘要

Archie's parameters, including the tortuosity factor 'a' and the porosity exponent 'm', are important parameters controlling the formation resistivity factor porosity relationship. Though, they are among the most important parameters, they are still a matter of controversy due to their dependence on many geological factors. They are not constant values, but vary greatly from facies to fades and from sub-facies to another. So, a considerable error would be assigned when the Archie's parameters are assumed to be constant values.