NO20071268L - Korreksjon av NMR-artefakter som skylder aksiell bevegelse med konstant hastighet og spinn-gitter relaksasjon - Google Patents

Korreksjon av NMR-artefakter som skylder aksiell bevegelse med konstant hastighet og spinn-gitter relaksasjon

Info

Publication number
NO20071268L
NO20071268L NO20071268A NO20071268A NO20071268L NO 20071268 L NO20071268 L NO 20071268L NO 20071268 A NO20071268 A NO 20071268A NO 20071268 A NO20071268 A NO 20071268A NO 20071268 L NO20071268 L NO 20071268L
Authority
NO
Norway
Prior art keywords
axial movement
spin
correction
constant velocity
lattice relaxation
Prior art date
Application number
NO20071268A
Other languages
English (en)
Other versions
NO337868B1 (no
Inventor
Martin Blanz
Holger F Thern
Original Assignee
Baker Hughes Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of NO20071268L publication Critical patent/NO20071268L/no
Publication of NO337868B1 publication Critical patent/NO337868B1/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5615—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
    • G01R33/5617—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE] using RF refocusing, e.g. RARE
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/32—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
    • G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
    • G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56308—Characterization of motion or flow; Dynamic imaging

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Remote Sensing (AREA)
  • Geophysics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Radiology & Medical Imaging (AREA)
  • Signal Processing (AREA)
  • Vascular Medicine (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

NMR-spinnekkosignaler blir korrigert for aksial bevegelse av loggeverktøyet i borehullet. En ytterligere korreksjon utføres for å korrigere for ufullstendig polarisering av kjernespinn på grunn av utilstrekkelig ventetid mellom pulssekvenser.
NO20071268A 2004-08-16 2007-03-08 Fremgangsmåte og anordning for behandling av kjernemagnetiske resonans-signaler fra en grunnformasjon NO337868B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/918,965 US7196516B2 (en) 2004-08-16 2004-08-16 Correction of NMR artifacts due to constant-velocity axial motion and spin-lattice relaxation
PCT/US2005/028421 WO2006023346A1 (en) 2004-08-16 2005-08-11 Correction of nmr artifacts due to constant-velocity axial motion and spin-lattice relaxation

Publications (2)

Publication Number Publication Date
NO20071268L true NO20071268L (no) 2007-05-14
NO337868B1 NO337868B1 (no) 2016-07-04

Family

ID=35134085

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20071268A NO337868B1 (no) 2004-08-16 2007-03-08 Fremgangsmåte og anordning for behandling av kjernemagnetiske resonans-signaler fra en grunnformasjon

Country Status (5)

Country Link
US (3) US7196516B2 (no)
CA (1) CA2576991C (no)
GB (1) GB2432007B (no)
NO (1) NO337868B1 (no)
WO (1) WO2006023346A1 (no)

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Also Published As

Publication number Publication date
WO2006023346A8 (en) 2006-06-15
GB2432007B (en) 2008-09-10
US20060033491A1 (en) 2006-02-16
US7196516B2 (en) 2007-03-27
NO337868B1 (no) 2016-07-04
US20060273787A1 (en) 2006-12-07
US20070222443A1 (en) 2007-09-27
CA2576991C (en) 2013-07-23
US7358725B2 (en) 2008-04-15
CA2576991A1 (en) 2006-03-02
US7339374B2 (en) 2008-03-04
GB0703892D0 (en) 2007-04-11
GB2432007A8 (en) 2007-10-23
GB2432007A (en) 2007-05-09
WO2006023346A1 (en) 2006-03-02

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