4) Archie's equation, which one of the most important equations in well logging, shows the relationship between rock properties and water saturation (Sw) as follow: Sw= n Where Rw is the (connate) water resistivity, R, is the true resistivity of formation, "m" is the cementation factor, "a" is the tortuosity factor and "n" is the saturation exponent. Assume n= 2 & Rw= 0.08 ohm.m a Rw om Rt Also, Archie's equation can be used in water bearing formations (where fully saturated with water Sw-100%) to estimate the formation water resistivity (R) or cementation factor which is known as Pickett plot method. By using linear regression and NO EXCEL PLOTS, calculate the Cementation Factor "m" and the tortuosity factor "a" for the following given table and data from a water zone (Sw=100%). 0.09 0.12 0.15 0.14 0.18 0.22 , porosity Rt, ohm.m 0.04 0.08 0.066 50 12.5 18 10 6 3.5 is infir 4 2.5 1.5