MEASUREMENT OF APERTURE AND MULTIPHASE FLOW IN FRACTURES WITH NMR IMAGING

Nuclear magnetic resonance imaging (NMRI) techniques were used for the measurement of the spatial distribution of apertures and two-phase fl uid distributions in rock fractures. Rock models of known apertures we re used to validate the NMRI technique. NMRI aperture values were in g ood agreement with nominal and hydraulic aperture values. The fracture signal in porous rock was isolated by NMR spin-spin relaxation times. Areal distributions of oil and water in an immiscible fracture flow w ere resolved on the basis of their NMR spin-lattice relaxation times.