The following information is given for a clean and dry sandstone core plug: Diameter - 3 cm cm merr Length - 4 cm-> X100 = 4000 Dry mass - 50 g Sandstone density - 2.65 g/cm Resistiuty 16o4 saturated brine Porosity. Forma fac Fresh water density = 1 g/cm! Roof Rw Factor a -0.81 Resistuty brine I twann (F= Find F () F= Cementation factor, m - 2 f Calculate the porosity of the core plug based on dimensions of the core plug, its dry = mass and sandstone density. Soy 2.65g/cm3 Porosity (ii) After fully saturating the core plug with 140,000 ppm NaCl with specific gravity 1.15, the mass of the saturated core plug becomes 61). Calculate the porosity based mas on the given information on Part (ii). = 63.04 "61g /1.15 = Calculate the resistivity of the fully saturated core at 80F using the porosity calculated in Part (ii)