These logs are capable of detecting formations less than 1.0in. thick, if the mud cake is very thin.
Micro-laterologs can be used in salt muds and high resistivities. Their response will be affected by mud cake greater than 3/8″ thick.
Typically used to measure Rxo and determine permeable beds by detecting mudcake.
Limitations
- Shallow invasion in porous and permeable formations can affect resistivity.
- Very thick mudcake decreases the effectiveness of the tool
- High Rxo vales in comparison to Rmf can result in poor logs
- If pads are not in contact with formation logs can be of poor quality
- Shaly sands will lead to lowered measured resistivities. This may lead to higher than normal porosities.
