Characterization of pore geometry using correlations between magnetic field and internal gradient

Abstract

We have applied a novel multi-dimensional NMR experiment to characterize the pore geometry in liquid saturated porous systems with variation in material content and pore structure. Using the correlation between the internal gradient and the difference in magnetic susceptibility we have established a novel approach for determining the pore size distributions. The obtained pore size distributions correspond well with distributions obtained from measurements based on Decay due to Diffusion in the Internal Field, but seems to overestimate the size of pores larger than approximately 100 μm.