skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Relaxation time estimation in surface NMR

Abstract

Technologies including NMR relaxation time estimation methods and corresponding apparatus are disclosed. Example techniques may include performing at least one single-pulse acquisition sequence, the single-pulse acquisition sequence comprising transmitting a single modulated pulse with a surface coil, wherein the phase, frequency, or amplitude of the single modulated pulse is varied during the single modulated pulse, and wherein the single modulated pulse excites a transverse magnetization component within a subsurface fluid. The resulting NMR signal may be recorded on at least one receiving device, including recording the NMR signal associated with the transverse magnetization component excited by the single modulated pulse. Processing techniques may be applied in which recorded NMR response data are used to estimate NMR properties and the relaxation times T1 and T2* as a function of position as well as one-dimensional and two-dimension distributions of T1 versus T2* as a function of subsurface position.

Inventors:
;
Issue Date:
Research Org.:
Vista Clara Inc., Mukilteo, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1637871
Patent Number(s):
10585204
Application Number:
15/042,932
Assignee:
Vista Clara Inc. (Mukilteo, WA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
DOE Contract Number:  
SC0013293
Resource Type:
Patent
Resource Relation:
Patent File Date: 02/12/2016
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Grunewald, Elliot D., and Walsh, David O. Relaxation time estimation in surface NMR. United States: N. p., 2020. Web.
Grunewald, Elliot D., & Walsh, David O. Relaxation time estimation in surface NMR. United States.
Grunewald, Elliot D., and Walsh, David O. Tue . "Relaxation time estimation in surface NMR". United States. https://www.osti.gov/servlets/purl/1637871.
@article{osti_1637871,
title = {Relaxation time estimation in surface NMR},
author = {Grunewald, Elliot D. and Walsh, David O.},
abstractNote = {Technologies including NMR relaxation time estimation methods and corresponding apparatus are disclosed. Example techniques may include performing at least one single-pulse acquisition sequence, the single-pulse acquisition sequence comprising transmitting a single modulated pulse with a surface coil, wherein the phase, frequency, or amplitude of the single modulated pulse is varied during the single modulated pulse, and wherein the single modulated pulse excites a transverse magnetization component within a subsurface fluid. The resulting NMR signal may be recorded on at least one receiving device, including recording the NMR signal associated with the transverse magnetization component excited by the single modulated pulse. Processing techniques may be applied in which recorded NMR response data are used to estimate NMR properties and the relaxation times T1 and T2* as a function of position as well as one-dimensional and two-dimension distributions of T1 versus T2* as a function of subsurface position.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {3}
}

Patent:

Save / Share:

Works referenced in this record:

NMR magnetization inversion by non-linear adiabatic fast passage
patent, September 1987


Apparatus for and method of nuclear quadrupole resonance testing of a sample
patent, December 2000


SNMR pulse sequence phase cycling
patent, November 2013


Adaptive reconstruction of phased array NMR imagery
patent, December 2000