Page 204 - Basic Well Log Analysis for Geologist
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LOG INTERPRETATION CASE STUDIES
SPONTANEOUS CONDUCTIVITY — wittimmos 7m: 1000
OHMS M2/M
CEEP INDUCTION
- lel + MILLIVOLTS
RESISTIVITY onms m2/m
DEE? INDUCTION
SPHERICALLY FOCUSED LOG
Ror
oe
a1 meas temp | 226 of 65° F
7
°F
7/8
gl meoe temp
at
T SIZE
ype Fluid in hole | FGM
Rec
Boor
Temp
at meos temp | 253 of 65°F
Figure 92. Induction-SFL* log with spontancous potential log. Cretaceous Pictured Cliffs Sandstone, San Juan basin.
Note:
The increase in SP deflection (track #1) and increase in resistivity (tracks #2 and #3) upward in the Pictured
Cliffs Sandstone (1.970 to 1.924 ft). These increases are the result of decreasing shale content upward in the
Pictured Cliffs Sandstone.
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