Page 134 - Petrophysics 2E
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PERMEABILITY-POROSITY RELATIONSHIPS 107
1000
?
.- i5
n
1 loo
10
1
Figure 3.12. Influence of grain size on the relationship between permeability and
porosity.
1000 L
14 1 I I
0 5 10 15 20 25 30 35
Porosity, %
Figure 3.13. Typical permeability-porosity relationship for various rock types
(courtesy of Core Laboratories).
Darcy’s law as can also approximate the flow of fluids through these n
capillaries:
q=(?) P (3.11)
L
where & is the total cross-sectional area, including cemented zones, of
this bundle of capillary tubes.
