A borehole logging tool comprises a Nuclear Magnetic Resonance (NMR) tool and is pulsed according to a selected Carr Purcell-Meiboom Gill (CPMG) sequence. Because the recovery time between CPMG sequences is short, the sequence acts as a filter such that signals induced by rapidly relaxing nuclei of fluid...http://www.google.de/patents/US5596274?utm_source=gb-gplus-sharePatent US5596274 - Determining bound and unbound fluid volumes using nuclear magnetic resonance pulse sequences
