PFG NMR time-dependent diffusion coefficient analysis of confined emulsion: Post drainage phase conformation

In this work, we present a characterization of phase configuration in water-saturated sintered glass bead samples after oil injection, through the analysis time-dependent diffusion coefficients obtained from sets one-dimensional pulsed field gradient nuclear magnetic resonance (PFG NMR) measurements, pre and post drainage. Estimates samples' surface-to-volume ratio permeability drainage PFG measurements sample were compared with analytical reported values, respectively, fair agreement was found both cases. Short-time extracted used to quantify increase probed by wetting Analysis water experiments carried out using bi-Gaussian model, two distinct scenarios considered describe fluids conformation within pores. For case where non-wetting exhibit poorly connected geometry, an assuming formation oil-in-water droplets pores performed, Gaussian distribution radii determined.