Nuclear magnetism well logging by en- hancement of proton polarization in weak polarizing fields

Claim 1

A NUCLEAR MAGNETISM WELL LOGGING METHOD FOR DERIVING PRECESSIONAL SIGNALS FROM PROTONS OF HYDROCARBON MOLECULES IN AN EARTH FORMATION FROM WITHIN A WELL BORE PENETRATING SAID EARTH FORMATION COMPRISING THE STEPS OF: (A) GENERATING FOR A CONTROLLABLE PERIOD OF TIME A WEAK POLARIZING MAGNETIC FIELD HAVING AT LEAST A COMPONENT THEROF PERPENDICULAR TO THE EARTH''S MAGNETIC FIELD, SAID WEAK MAGNETIC FIELD BEING INADEQUATE ALONG TO ESTABLISH MEASUREBLE POLARIZATION OF PROTONS OF WATER MOLECULES WITHIN SAID EARTH FORMATION, (B) SIMULTANEOUSLY DURING AT LEAST A PORTION OF THE TIME SAID WEAK POLARIZING FIELD IS BEING GENERATED, IRRADIATING SAID EARTH FORMATION WITH A RADIO FREQUENCY RADIATION THAT IS PREFERENTIALLY ABSORBED BY ELECTRONS IN FREE RADICALS OF SAID HYDROCARBON MOLECULES IN SAID WEAK POLARIZING FIELD, (C) INTERRUPTING BOTH SAID WEAK POLARIZING MAGNETIC FIELD AND SAID IRRADIATING MAGNETIC FIELD, (D) AND DETECTING PRECESSION SIGNALS INDUCED BY PROTONS OF SAID HYDROCARBON MOLECULES PRECESSING IN THE EARTH''S MAGNETIC FIELD.