Patent ID: 7205762
Filing Date: 2007-04-17
Classification: E21B,G01N,G01R,G01V

Abstract:
1. An apparatus for obtaining a parameter of interest of an earth formation, comprising: (a) a magnet on a nuclear magnetic resonance (NMR) sensor of a downhole logging tool which aligns spins of nuclei in a region of interest of said earth formation; (b) a chamber on said logging tool, the chamber containing a polarizing agent; (c) a device which polarizes spins of said polarizing agent and conveys said polarizing agent into said earth formation thereby enhancing alignment of spins of said nuclei in said region of interest; (d) a transmitter which applies a radio frequency (RF) pulse sequence to said earth formation; (e) a receiver which receives NMR signals from said region of interest responsive to said radio frequency pulse; and (f) a processor which determines from said NMR signals a parameter of interest of said earth formation.