Question: F F Vsh (%) Rt Ohm-m 31 38 TABLE 4B Sample No. Permeability Porosity 1 127.0000 0.151 2 237.0000 0.171 3 3.1600 0.098 4 17.6000

F F Vsh (%) Rt Ohm-m 31 38 TABLE 4B Sample No. Permeability Porosity 1 127.0000 0.151 2 237.0000 0.171 3 3.1600 0.098 4 17.6000 0.113 5 1.6200 0.093 6 0.2280 0.075 7 2.7600 0.098 8 0.0248 0.040 29.58 24.40 74.68 47.17 87.53 128.32 78.41 312.41 4.46 4.17 7.32 5.33 8.14 9.62 7.68 12.5 19 27 12 9 18 3 5. Table 4B shows values of permeability, porosity, formation resistivity factor, shale (clay) fraction, and resistivity Ro of eight zones of a shaley (clayey) formation. The resistivity of shale is 4 ohm-m and the formation water resistivity is 0.1 ohm-m. (a) Estimate the water saturation in each zone using (1) the generalized shale relationship, and (2) Hilchie's approximate shale relationship, and compare the results. (b) Determine the tortuosity factor and correlate with the shale fraction. Explain
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