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Oilfield Glossary
Oilfield Glossary
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magnetic mud

1. n. [Formation Evaluation]
A drilling mud with a significant magnetic susceptibility. The magnetic susceptibility may affect the response of some logging measurements, mainly the induction X signal and nuclear magnetic resonance logs. The most common magnetic muds contain iron filings or magnetite. Other paramagnetic minerals such as hematite and ilmenite may contribute, although their magnetic susceptibility is considerably less.