Table 2 The value range of different electrical parameters according to each different case.
Parameter | Sample case | Value range | Fig. | ||
|---|---|---|---|---|---|
From | To | ||||
Real conductivity | Cracked core | 7 × 10− 3 S/m | 7 × 10− 5 S/m | 6, a | |
Natural core | 2 × 10− 3 S/m | 2 × 10− 5 S/m | 6, b | ||
Synthetic | 2 × 10− 4 S/m | 2 × 10− 6 S/m | 6, c | ||
Contaminant | 1.8 × 10− 6 S/m | ||||
Dielectric constant | Cracked core | 1010 | 8 × 108 | 7, a | |
Natural core | 8 × 109 | 2 × 108 | 7, b | ||
Synthetic | 8 × 108 | 7 × 106 | 7, c | ||
Contaminant | 7 × 106 | ||||
Real impedance | Cracked core | 2 × 102 Ohm.m | 2 × 104 Ohm.m | 8, a | |
Natural core | 8 × 102 Ohm.m | 5 × 104 Ohm.m | 8, b | ||
Synthetic | 4 × 102 Ohm.m | 3 × 104 Ohm.m | 8, c | ||
Contaminant | 7 × 105 Ohm.m | ||||
Imaginary impedance | Cracked core | 104 Ohm.m | 1 Ohm.m | 9, a | |
Natural core | 104Ohm.m | 10 Ohm.m | 9, b | ||
Synthetic | 104 Ohm.m | 100 Ohm.m | 9, c | ||
Contaminant | 105 Ohm.m | ||||
