Page 164 - Basic Well Log Analysis for Geologist
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LOG INTERPRETATION CASE STUDIES
eee eee eee reer eee eee eee reece ce cee eee
Effect of grain size
a
90}-
60}--
sw %
Figure 57. Grain size determination by water saturation (Sy)
versus porosity (@) crossplot, Pennsylvanian Atoka
J VFG Note: Remember that water saturation Archie (S,,)
20, Sandstone, Permian basin.
F-MG
is equal to Sy ;,, in Zones at irreducible water
CG
i
io
44. 4, ob
saturation.
6 78 91 15 20350
G %
K= permeability, md
8 8 a ]
gs
lL
§ : Figure 58. Irreducible water saturation (S,, ;,-) versus porosity
Swirr % §
5
(@) crossplot for determining permeability,
K= 0.136(8 4 4 Swirr? ) Pennsylvanian Atoka Sandstone, Permian basin.
3 ey So Remember that water saturation Archie (S,,) is
8 T Timur Note:
Y
equal to S.j,, in zones at irreducible water
saturation.
QO 35 40
" g no
149
