MNOR
SchlumbergerΩ·cmTool: PCDBMicro Normal
The long-spacing microlog resistivity, reading slightly deeper than the micro inverse into the flushed zone. The micro normal minus micro inverse separation is the microlog permeability signature.
- Property
- Micro Normal Resistivity
- Micro Resistivity
- Quantity
- electrical resistivity
- Ω·cm · kΩ·m · Ω·m²/m · nΩ·mm²/m · Ω·m · nΩ·mil²/ft
- Typical range
- ~0.9–55.5 ohm·m
- ohm·m, flushed zone
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How it's measured
A wider electrode spacing on the microlog pad reads a few inches into the formation — past most of the mudcake into flushed rock — while riding the wall.
How it's used
With the micro inverse, it identifies permeable beds via positive separation and gives a shallow, qualitative Rxo. Sharp vertical resolution also helps pick bed boundaries.
Common gotchas
Pad contact is essential — washouts and rugosity ruin it. It reads flushed, filtrate-invaded rock, so treat it as a permeability and Rxo indicator, not a saturation curve.
In LAS files
Recorded as MNOR (or MNO, RMNO) in ohm·m, paired with MINV (micro inverse).
Also seen with MNOR in real logs
Curves that appear alongside MNOR in the same wells across the public corpus.