Nuclear-magnetic-resonance diffusion simulations in porous media

Nuclear-magnetic-resonance (NMR) diffusion simulations were performed numerically in unconsolidated and consolidated porous media. The curve of the apparent diffusion coefficient as a function of time was found to be a poor indicator of the pore structure. Various representations were tried to gather the data. A successful one uses a combination of surface-to-volume ratio, formation factor, and permeability; it can be used in different ways in order to derive these parameters from NMR measurements. (C) 2005 American Institute of Physics.