ANALYSIS OF FLUIDS IN POROUS MEDIA BY PULSED FIELD GRADIENT NUCLEAR MAGNETIC RESONANCE.

摘要

The present invention is a method to determine the bound and free fluid index of fluids in porous media by field gradient (PFG) NMR diffusion measurements. The PFG NMR signal is evaluated using a two-fluid model That describes the self diffusion coefficients for the fluid fractions with low and high translational mobilities.