structural geology, propagation mechanics and - Stanford School of ...

B‘
A‘
A
c
f
m
c
m
c
f
c
f
c
f
c
f
4.8 mm
0.9 mm
1.8 mm
3.3 mm
B
4.5 mm
0.9 mm
0.6 mm
1.5 mm
0.9 mm
1.2 mm
1.5 mm
7.2 mm
0.9 mm
K n
L = 3 cm
=
K n
=
K p
k f k m
K p
kc lc + kf lf + km L
l c
k c k f k m L
+ kc km lf +
l m
k c k f
l m
Bulk Permeability Estimates
Kp Kn Mean
Minimum
Maximum
1,053 mD 804 mD
655 mD 482 mD
2,614 mD 1,785 mD
Figure 5.8. Computation of bulk permeability parallel (Kp) and normal (Kn) to
depositional bedding for the composite transect A-A’—B-B’ shown in Figure 5.4. Kp and
Kn are calculated as weighted arithmetic and harmonic averages, respectively (Deutsch,
1989). Coarse-grain permeability and the total thickness of coarse-grain beds along the
transect are connoted by kc and lc, respectively. Similarly, kf, lf, km, and lm represent these
values for fine and mixed-grain beds. The mean, minimum and maximum bulk
permeability estimates are computed using the corresponding mean, minimum and
maximum values of kc, kf and km (Figure 5.7).
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