FIGURE 7 Log resitivity vs time data of sample Bx and By in first saturation and measurements are made right after brine injection.
FIGURE 8 Resistivity measurements of the three horizontal samples on dry condition and saturated. (a) left-side; (b) middle; (c) right-side. The green colour is the brine injected into the samples
FIGURE 9 Illustration of saturated samples: (a) the brine is below the potential electrode P1 (region 1); (b) the brine is between two potential electrodes P1 and P2 (region 2); (c) the brine passes through the potential electrode P2 (region 3).
FIGURE 10 Observation on the samples that injected with brine from the middle position: (a) sample A; (b) sample B; (c) sample C.
FIGURE 11 Log resistivity vs brine: (a) samples A; (c) sample B; (c) sample C.
FIGURE 12 Calculation of electrical resistivity: (a) samples A; (c) sample B; (c) sample C.
FIGURE 13 Table 1
FIGURE 14 Table 2
FIGURE 15 Table 3
FIGURE 16 Table 4
FIGURE 17 Table 5
8. TABLES
TABLE 1 Physical properties of samples.
TABLE 2 Measurement of electrical resistivity in copper and brass cylinders, and comparison between DC and AC resistivity measurements of saturated sandpack.
TABLE 3 The time to reach constant resistivity for each saturation.
TABLE 4 Physical properties of samples that obtained from digital image analysis.
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