Spatial resolved nuclear magnetic resonance in the study of rock heterogeneity and centrifuge capillary pressure

Taking rock and saturation heterogeneity into account is of great importance both in well logging and petrophysical core analysis programs. This work presents some results achieved with novel low field laboratorial nuclear magnetic resonance techniques that can spatially resolve transversal relaxation time (T2) and signal amplitudes along core plugs length. The measurement quality is firstly tested with a mixture of bulk fluids (water and oil) and then performed in sandstone and carbonate rocks under fully and also partially (centrifuged) saturated conditions. These one dimensional rock imaging techniques can efficiently inform about sample pore-size distribution heterogeneities and also monitor in situ rock saturation with important centrifuge capillary pressure implications.