Method for NMR diffusion measurement

Details Method for NMR diffusion measurement Method for NMR diffusion measurement

1996-05-01

1997-12-16

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using well logging device

324300, G01U 332, G01U 318

Patent

active

056989792

ABSTRACT:
A method of measuring motion properties of nuclei within pore spaces of a porous medium. The method includes applying a static magnetic field to the medium to polarize the nuclei, generating a first magnitude of magnetic field gradient within the pore spaces of the medium, applying a radio frequency magnetic field to excite the nuclei, receiving nuclear magnetic resonance signals from the nuclei, and calculating the motion properties from rates of decay of the amplitude of the nuclear magnetic resonance signals. A preferred embodiment includes applying a static magnetic field having a first amplitude, a second amplitude and an amplitude gradient, applying the radio frequency magnetic field at a first frequency to excite the nuclei within the first static magnetic field amplitude, receiving resonance signals at the first frequency, applying a radio frequency magnetic field at a second frequency to excite the nuclei within the second static magnetic field amplitude, receiving resonance signals at the second frequency, and calculating the motion properties from the difference in rates of decay of the amplitudes of the resonance signals from the first and the second frequencies.

REFERENCES:
patent: 4717877 (1988-01-01), Taicher et al.
patent: 5212447 (1993-05-01), Paltiel
patent: 5428291 (1995-06-01), Thomann et al.
J. Glasel et al, "On the Interpretation of Water Nuclear Magnetic Resonance Relaxtion Times in Heterogeneous Media," Journal of the American Chemical Society, vol. 96, No. 4 Feb. 20, 1974, pp. 970-977.
L. Latour et al, "Time-Dependent Diffusion Coefficient of Fluids in Povrous Media as a Probe of Surface-to-Volume Ratio," Journal of Magnetic Resonance, Series, A, vol. 101, pp. 342-346 (1993) Academic Press, Inc.

Affiliated with

Also associated with

Rating

Method for NMR diffusion measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for NMR diffusion measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for NMR diffusion measurement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-210475