CA2287141A1 - Preconditioning spins near a nuclear magnetic resonance region - Google Patents

Preconditioning spins near a nuclear magnetic resonance region Download PDF

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Publication number
CA2287141A1
CA2287141A1 CA002287141A CA2287141A CA2287141A1 CA 2287141 A1 CA2287141 A1 CA 2287141A1 CA 002287141 A CA002287141 A CA 002287141A CA 2287141 A CA2287141 A CA 2287141A CA 2287141 A1 CA2287141 A1 CA 2287141A1
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CA
Canada
Prior art keywords
region
sequence
sample
envelope
resonance region
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002287141A
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French (fr)
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CA2287141C (en
Inventor
Peter Speier
Krishnamurhty Ganesan
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Schlumberger Canada Ltd
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Schlumberger Canada Ltd
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Publication date
Application filed by Schlumberger Canada Ltd filed Critical Schlumberger Canada Ltd
Publication of CA2287141A1 publication Critical patent/CA2287141A1/en
Application granted granted Critical
Publication of CA2287141C publication Critical patent/CA2287141C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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

Abstract

A method and an apparatus for obtaining NMR measurements are disclosed. An NMR measurement apparatus, the measured sample, or both elements may be subjected to motion during the measurement. The envelope of an RF carrier signal is modulated according to an envelope to generate a first sequence of RF pulses. The envelope, the phase of the RF signal, and/or a static magnetic field may be varied during the radiation of the first sequence to substantially saturate a first region of the sample.
The first sequence may include additional RF refocusing pulses that, when coupled with movement of the NMR measurement apparatus or sample, may also be used to substantially saturate the first region. A second sequence of RF pulses is radiated to establish a resonance region within the first region and measure an attribute of the sample.
CA002287141A 1998-12-04 1999-10-19 Preconditioning spins near a nuclear magnetic resonance region Expired - Fee Related CA2287141C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/205,965 US6492809B1 (en) 1998-12-04 1998-12-04 Preconditioning spins near a nuclear magnetic resonance region
US09/205,965 1998-12-04

Publications (2)

Publication Number Publication Date
CA2287141A1 true CA2287141A1 (en) 2000-06-04
CA2287141C CA2287141C (en) 2004-08-31

Family

ID=22764413

Family Applications (1)

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CA002287141A Expired - Fee Related CA2287141C (en) 1998-12-04 1999-10-19 Preconditioning spins near a nuclear magnetic resonance region

Country Status (12)

Country Link
US (2) US6492809B1 (en)
CN (4) CN1256427A (en)
AR (1) AR021325A1 (en)
AU (1) AU741353B2 (en)
CA (1) CA2287141C (en)
DE (1) DE19957767A1 (en)
EG (1) EG22176A (en)
GB (1) GB2346216B (en)
ID (1) ID23962A (en)
MX (1) MXPA03005196A (en)
NL (2) NL1013602C2 (en)
NO (1) NO331087B1 (en)

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WO2015085292A1 (en) * 2013-12-08 2015-06-11 Schlumberger Canada Limited Downhole monitoring of fluids using nuclear magnetic resonance
MY177192A (en) * 2014-05-01 2020-09-09 Halliburton Energy Services Inc Casing segment having at least one transmission crossover arrangement
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Also Published As

Publication number Publication date
CN100410681C (en) 2008-08-13
EG22176A (en) 2002-10-31
CN101295012A (en) 2008-10-29
CN1256427A (en) 2000-06-14
AU741353B2 (en) 2001-11-29
NO331087B1 (en) 2011-10-03
GB9925826D0 (en) 1999-12-29
AR021325A1 (en) 2002-07-17
CN101074986B (en) 2011-01-12
NL1013602A1 (en) 2000-06-06
NO995933D0 (en) 1999-12-03
CN1560648A (en) 2005-01-05
GB2346216B (en) 2001-07-11
NL1022631A1 (en) 2003-04-07
US20030020473A1 (en) 2003-01-30
DE19957767A1 (en) 2000-06-08
ID23962A (en) 2000-06-08
US6844728B2 (en) 2005-01-18
NL1022631C2 (en) 2007-02-13
GB2346216A (en) 2000-08-02
NO995933L (en) 2000-06-05
AU5831399A (en) 2000-07-20
CN101074986A (en) 2007-11-21
NL1013602C2 (en) 2003-02-24
CN101295012B (en) 2011-06-08
CA2287141C (en) 2004-08-31
US6492809B1 (en) 2002-12-10
MXPA03005196A (en) 2003-09-29

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