Patent ID: 7116103
Filing Date: 2006-10-03
Classification: G01N,G01V

Abstract:
1. A nuclear magnetic resonance (NMR) well logging apparatus, comprising: a field gradient generator operational to apply a static magnetic field gradient to a fluid of a subterranean region; a signal generator operational to apply first and second sequences of magnetic pulses to the region; a signal receiver operational to receive a NMR signal responsive to the pulses; a processing circuit coupled with the signal generator and the signal receiver, the processing circuit being programmed with instructions which, when executed by the processing circuit: cause: the signal generator to generate first and second sequences of magnetic field pulses to the region; the signal receiver to receive a resultant NMR signal from the region; and cause the processing circuit to: capture a magnetization spectrum in response to each of the first and second sequences of magnetic field pulses, the magnetization spectrum being represented as a function of frequency; and analyze a change in the magnetization spectrum resulting from the first and second sequences and extract therefrom information about the fluid.