NUCLEAR MAGNETIC RESONANCE LOGGING TOOL HAVING MULTIPLE PAD-MOUNTED ATOMIC MAGNETOMETERS

摘要

Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ a plurality of NMR sensors, including atomic magnetometers, mounted on pads. Certain method embodiments include: utilizing the Earth magnetic field to pre -polarize the protons in a formation; utilizing a plurality of atomic magnetometers to obtain NMR. measurements; and determining at least one characteristic relaxation time of the formation. The NMR sensor may optionally include a permanent, magnet assembly.