Consider a shale-free, dry, sandstone core plug. by measurement, the following data are known: d=2.54 cm, l=5.00 cm, and mass (dry) =52.80 g.
f. for an exponent n of 1.9, 1). what would be the end-to-end resistance of the core and its true resistivity? 2). estimating the porosity and permeability of this sand?
g. if the sandstone contains clay, the mass of the saturated plug with the same nacl brine is 57.06, vsh=20%, and rsh=0.8 ω∙m. 1). calculate the water saturation assuming clean sand. 2). calculate the water saturation using fertl and hammack’s equation.