... Abstract This paper quantitatively evaluates the hierarchical structure of multiple-porosity systems, including natural micro-fractures, inter-granular, and intra-granular pores, using nuclear magnetic resonance (NMR) measurements. Conventional well logs cannot distinguish between different...

... gradient coil which is a built-in feature of Oxford Instrument spectrometer. NMR signal water saturation pressure step pore size mapping log analysis well logging cutoff Upstream Oil & Gas pore pressure NMR measurement porosity plug saturation core plug international petroleum...