Determining bound and unbound fluid volumes using nuclear magnet

Details Determining bound and unbound fluid volumes using nuclear magnet Determining bound and unbound fluid volumes using nuclear magnet

1994-10-31

1997-01-21

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using well logging device

G01R 3320

Patent

active

055962742

ABSTRACT:
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 bound in an earth formation are detected. In this manner, the NMR tool gives a direct indication bound fluid volume and fast logging speeds are achieved.

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