WO2004070423A3 - Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in NMR logs - Google Patents

Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in NMR logs Download PDF

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Publication number
WO2004070423A3
WO2004070423A3 PCT/US2004/002295 US2004002295W WO2004070423A3 WO 2004070423 A3 WO2004070423 A3 WO 2004070423A3 US 2004002295 W US2004002295 W US 2004002295W WO 2004070423 A3 WO2004070423 A3 WO 2004070423A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
ringing
echo
estimation
pulses
Prior art date
Application number
PCT/US2004/002295
Other languages
French (fr)
Other versions
WO2004070423A2 (en
WO2004070423A9 (en
Inventor
Manfred Prammer
Original Assignee
Halliburton Energy Serv Inc
Manfred Prammer
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 Halliburton Energy Serv Inc, Manfred Prammer filed Critical Halliburton Energy Serv Inc
Priority to BRPI0407061-5A priority Critical patent/BRPI0407061B1/en
Priority to GB0515549A priority patent/GB2418021B/en
Publication of WO2004070423A2 publication Critical patent/WO2004070423A2/en
Publication of WO2004070423A9 publication Critical patent/WO2004070423A9/en
Publication of WO2004070423A3 publication Critical patent/WO2004070423A3/en

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Classifications

    • 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
    • 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

Abstract

A method and system are disclosed for NMR echo-train data acquisition and processing for enhanced tracking of the error in the signal due to magnetoacoustic effects, known as ringing, that are not cancelled out or otherwise corrected. In one aspect, the method enables correction of ringing signals in a single pass by way of collecting a composite signal that includes echoes due to pulses at least at two different frequencies. The choice of one or more of the frequencies, the phase of the pulses, and the recovery period enable cancellation of the ringing signal from the echoes, including the echo from an excitation pulse. In another aspect, the method encompasses providing protection against errors due to tool motion by saturating a relatively wide sensitive region with the echo signals collected from within this relatively wide sensitive signal. Preferred embodiments of the invention include one or more of the aforementioned aspects.
PCT/US2004/002295 2003-01-28 2004-01-27 Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in nmr logs WO2004070423A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0407061-5A BRPI0407061B1 (en) 2003-01-28 2004-01-27 METHODS FOR NUCLEAR MAGNETIC RESONANCE (NMR) MEASUREMENT OF EARTH-TRAINING PETROPHYSICAL PROPERTIES, AND A SYSTEM FOR INCREASING THE RESOLUTION OF NMR RECORD DATA OBTAINED USING A MULTI-FREQUENCY MRI OPERATING TOOL
GB0515549A GB2418021B (en) 2003-01-28 2004-01-27 Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in NMR logs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/352,763 US6956371B2 (en) 1995-10-12 2003-01-28 Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in NMR logs
US10/352,763 2003-01-28

Publications (3)

Publication Number Publication Date
WO2004070423A2 WO2004070423A2 (en) 2004-08-19
WO2004070423A9 WO2004070423A9 (en) 2004-09-30
WO2004070423A3 true WO2004070423A3 (en) 2006-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/002295 WO2004070423A2 (en) 2003-01-28 2004-01-27 Method and apparatus for detecting diffusion sensitive phases with estimation of residual error in nmr logs

Country Status (4)

Country Link
US (1) US6956371B2 (en)
BR (1) BRPI0407061B1 (en)
GB (1) GB2418021B (en)
WO (1) WO2004070423A2 (en)

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Also Published As

Publication number Publication date
US20040008027A1 (en) 2004-01-15
BRPI0407061A (en) 2006-01-17
BRPI0407061B1 (en) 2019-04-24
GB0515549D0 (en) 2005-09-07
WO2004070423A2 (en) 2004-08-19
GB2418021B (en) 2007-09-05
WO2004070423A9 (en) 2004-09-30
US6956371B2 (en) 2005-10-18
GB2418021A (en) 2006-03-15

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