1. n. [Formation Evaluation]

The application of nuclear magnetic resonance (NMR) logging to the determination of hydrocarbon type (gas, light oil, medium oil, heavy oil), using only NMR data. Three techniques are most commonly used: differential spectrum, shifted spectrum, and enhanced diffusion.

See related terms: differential spectrum,  enhanced diffusion,  heavy oil,  nuclear magnetic resonance,  nuclear magnetic resonance measurement,  shifted spectrum