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1. (US4728892) NMR imaging of materials

Office : United States of America
Application Number: 06765406 Application Date: 13.08.1985
Publication Number: 4728892 Publication Date: 01.03.1988
Grant Number: 4728892 Grant Date: 01.03.1988
Publication Kind : A
IPC:
G01R 33/20
G01R 33/44
G01R 33/48
G01R 33/50
G01V 3/18
G01V 3/32
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
44
using nuclear magnetic resonance (NMR)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
44
using nuclear magnetic resonance (NMR)
48
NMR imaging systems
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
44
using nuclear magnetic resonance (NMR)
48
NMR imaging systems
50
based on the determination of relaxation times
G PHYSICS
01
MEASURING; TESTING
V
GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18
specially adapted for well-logging
G PHYSICS
01
MEASURING; TESTING
V
GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18
specially adapted for well-logging
32
operating with electron or nuclear magnetic resonance
Applicants: Shell Oil Company
Inventors: Vinegar Harold J.
Rothwell William P.
Priority Data:
Title: (EN) NMR imaging of materials
Abstract: front page image
(EN)

NMR imaging methods are provided for determining the spatial petrophysical properties of materials. These methods employ the generation of separate M.sub.o, T.sub.1 and T.sub.2 images from which various petrophysical characteristics may be obtained, such as free fluid index, porosity, pore sizes and distributions, capillary pressure, permeability, formation factor and clay content.