Dependence of the liquid transverse relaxation time T-2 in porous media on fluid flow velocity

作者：Loskutov V^*; Zhakov S

来源：International Journal of Heat and Mass Transfer, 2016, 101: 692-698.

DOI：10.1016/j.ijheatmasstransfer.2016.05.057

• Porous media
• NMR
• Fluid flow
• Transverse relaxation
• Permeability

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.

• 出版日期2016-10