9. Nuclear Magnetic Resonance

摘要: Publisher Summary The chapter presents a review on the methods and applications of nuclear magnetic resonance (NMR) measurements porous media. It focuses amplitude relaxation techniques developed specifically for Other reviews cover imaging, pulsed field-gradient techniques, characterization fluid flows by NMR. Special attention is paid to sedimentary rocks, which present broad range difficulties experimentalist are in many respects “worst-case” Measurements have been made laboratory and, some cases, “inside-out’’ NMR equipment operating as much 10 km underground purpose measuring properties subsurface geological formations situ . Where pore openings molecular scale, such intercalation compounds zeolites, guest phases behave individual molecules not continuous fluids. Methods that useful characterizing these materials distinct from those presented chapter. use investigate media has primarily focused fluids space. Because common rich hydrogen, most based proton measurements. An time measurement can be used determine volumetrically weighted distribution sizes spanning several orders magnitude. Properties derived NMR-determined size include hydraulic permeability capillary pressure curve. Calibrated spin density simplest accurate way measure volume fraction space (porosity).