The Archie Equation is a mainstay of conventional petrophysical analysis, but what exactly is it?  How was it created and what the various factors and exponents actually mean?  It is important to understand these things, since the saturation estimates from the Archie Equation may be critical in our STOIIP estimations, upon which the success of our prospect evaluation and development planning rely.  Where are the errors and the uncertainties like to be in our analyses using the Archie equation?  To answer that question we really need to dig deep and understand the fundamentals.

Check out this Archie Equation Cheatsheet to see if you helps you.  If you have any comments or suggestions, please do let us know.