Dependence of the liquid transverse relaxation time T2 in porous media on fluid flow velocity. (October 2016)

• Record Type: Journal Article
• Authors: Loskutov, V.; Zhakov, S.
• Is Part Of: International journal of heat and mass transfer. Volume 101(2016:Oct.)
• Page Start: 692
• Page End: 698
• Publication Date: 2016-10
• Subjects: Porous media -- NMR -- Fluid flow -- Transverse relaxation -- Permeability; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2016.05.057
• Languages: English
• ISSNs: 0017-9310

Abstract

Graphical abstract: Highlights: A new approach for determining flow permeability of porous media by NMR. Direct detecting of fluid velocity in porous samples by CPMG pulse sequence. The mean relaxation rate is proportional to fluid velocity. Abstract: We analyze a new approach for determining flow permeability using a nuclear magnetic resonance (NMR) measurement in the presence of induced fluid flow. Direct detecting of fluid movement in porous core samples through the Carr–Purcell–Meiboom–Gill (CPMG) pulse sequence is demonstrate and theoretical model and analysis is given. Experiments performed on a set of sandstone samples (Berea, Bentheimer, Castle Gate, Leopard) and with synthetic high-perm samples made of abrasive material. The experiments show that the NMR spin echo measurements permit to fix mean fluid velocity about 0.05 mm/s. The experiments and the theoretical model show that for low fluid velocities the mean relaxation rate is proportional to fluid velocity. The results may serve as the basis for determination of mobility of liquids in porous media and permeability.