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Experimental data (dolomite)
Model
Sample E3
Dolomite limestone
Experimental data (dolomite)
Model
C r = s w -( n +1)
1-(1- s e 1/ m v ) m v
2
s e -1/ m v -1 1- m v
s e
p c = p e
10 0
6
10 -5
s r = 0.31 ± 0.03
m v = 0.422 ± 0.003 R = 0.999
p e = 27 kPa, s r = 0.31, m v = 0.42
10 -1
10 -6
5.5
10 -2
10 -7
5
10 -3
10 -8
4.5
10 -9
10 -4
10 -10
10 -5
4
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Water saturation, s w (—)
Water saturation, s w (—)
Figure 3.12 Comparison between experimental data and the prediction of the model developed by Revil et al. (2007) with the van
Genuchten model (see also Linde et al., 2007). The experimental data are from Revil and Cerepi (2004) and Revil et al. (2007) (Sample
E3). Left panel: absolute and relative streaming potential coupling coefficient versus saturation. We used the measured value of the
saturation exponent (second Archie
s exponent) n = 2.7. Right panel: fit of the capillary pressure curve with the same van Genuchten
parameters that were obtained for the coupling coefficient (using a nonwetting fluid: mercury with water as the wetting fluid).
'
Sample E39
Dolomite limestone
Experimental data (dolomite)
Model
s e -1/ m v -1
1- m v
p c = p e
s r = 0.34 ± 0.02, m v = 0.55 ± 0.02
1
6
p e = (1.28 ± 0.12) × 10 5 Pa, R = 0.95
5.8
10 -6
0.1
5.6
Experimental data
Model
5.4
10 -7
0.01
2
C r = s w -( n +1)
1-(1- s e 1/ m v ) m v
s e
5.2
s r = 0.34±0.02, m v = 0.55±002
R = 0.993
10 -8
0.001
5
0.4
0.5
0.6
0.7
0.8
0.9
1
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Water saturation, s w (—)
Water saturation, s w (—)
Figure 3.13 Comparison between experimental data and the prediction of the model developed by Revil et al. (2007) with the van
Genuchten model (see also Linde et al., 2007). The experimental data are from Revil and Cerepi (2004) and Revil et al. (2007) (Sample
E39). Left panel: absolute and relative streaming potential coupling coefficient versus saturation. We used the measured value of the
saturation exponent (second Archie
s exponent) n = 3.5. Right panel: fit of the capillary pressure curve with the same van Genuchten
parameters that were obtained for the coupling coefficient (nonwetting fluid, mercury; wetting fluid, water).
'
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