Page 195 - Basic Well Log Analysis for Geologist

Uf INTERPRETATION CASE STUDIES

SPONTANEOUS - POTENTIAL CONDUCTIVITY
MILLIVOLTS millimhos/m =
I TION
500

RESISTIVITY

16" NORMAL

INDUCTION
L

DEPTH
8007
RM BHT
OM
at 135° F
RUF BHT
0. at 135° F
9
BLT SIZE
Emutnion
l21
at
FLUID IN HOLE | Oil
6° F
Rec BUT
REC TEMP.
WAX.
135° F
199
a@ 62° F
Ril ot meas. temp

Figure 85. Induction electric log with spontaneous potential log. Pennsylvanian upper Morrow Sandstone, Anadarko basin.
Note:
i. The deflection of the SP curve in track #1 to the left away from the shale baseline (7.440 — 7.452 ft), opposite
the porous and permeable upper Morrow Sandstone.
2. The separation of the short normal curve (R;) from the induction curve (R,) in track #2 indicates invasion has
taken place, and that the upper Morrow Sandstone is permeable.

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