MINV
SchlumbergerΩ·cmMicro Inverse
The short-spacing microlog resistivity, reading the mudcake and the first inch of flushed formation. Its separation from the micro normal (positive separation) is a classic permeable-bed indicator.
- Property
- Micro Inverse Resistivity
- Micro Resistivity
- Quantity
- electrical resistivity
- Ω·cm · kΩ·m · Ω·m²/m · nΩ·mm²/m · Ω·m · nΩ·mil²/ft
- Typical range
- ~0.2–49.8 ohm·m
- ohm·m, mudcake and flushed zone
Logging tool
No logging tool is associated with this curve.
Service company
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How it's measured
A closely-spaced electrode pair on the microlog pad measures very shallow resistivity — dominated by mudcake on permeable beds — while the pad rides the borehole wall.
How it's used
Permeability indication: positive separation between micro normal and micro inverse marks mudcake on porous, permeable zones. Also a qualitative Rxo and bed-boundary aid.
Common gotchas
A pad tool, so rugose hole and poor contact corrupt it. It reads mudcake and filtrate, not the reservoir — use it qualitatively, with the caliper, not for quantitative saturation.
In LAS files
Recorded as MINV (or MIN, RMIN) in ohm·m, paired with MNOR (micro normal).
Also seen with MINV in real logs
Curves that appear alongside MINV in the same wells across the public corpus.