WO2002103395A3 - System and methods for nmr signal processing without phase alternated pair stacking - Google Patents

System and methods for nmr signal processing without phase alternated pair stacking Download PDF

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Publication number
WO2002103395A3
WO2002103395A3 PCT/US2002/018652 US0218652W WO02103395A3 WO 2002103395 A3 WO2002103395 A3 WO 2002103395A3 US 0218652 W US0218652 W US 0218652W WO 02103395 A3 WO02103395 A3 WO 02103395A3
Authority
WO
WIPO (PCT)
Prior art keywords
methods
formation
signal processing
nmr
data acquisition
Prior art date
Application number
PCT/US2002/018652
Other languages
French (fr)
Other versions
WO2002103395A2 (en
Inventor
Ridvan Akkurt
Ronald E Cherry
Original Assignee
Halliburton Energy Serv 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 Halliburton Energy Serv Inc filed Critical Halliburton Energy Serv Inc
Priority to EP02739852A priority Critical patent/EP1397705A4/en
Priority to AU2002312475A priority patent/AU2002312475B2/en
Priority to CA2455383A priority patent/CA2455383C/en
Priority to BRPI0210438-5A priority patent/BR0210438B1/en
Publication of WO2002103395A2 publication Critical patent/WO2002103395A2/en
Publication of WO2002103395A3 publication Critical patent/WO2002103395A3/en
Priority to NO20035568A priority patent/NO20035568D0/en

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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
    • 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
    • G01N24/082—Measurement of solid, liquid or gas content
    • 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
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/3808—Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only; Magnet assemblies for inside-out MR, e.g. for MR in a borehole or in a blood vessel, or magnet assemblies for fringe-field MR
    • 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

Abstract

A system and methods for improving the vertical resolution of NMR logs based on data acquisition methods and signal processing techniques that need not apply Phase Alternated Pair Stacking 'PAPS'. The method is based on reducing the level of coherent non-formation signals, by estimating these signals and removing the estimates from the underlying NMR pulse echo trains. Once the estimated non-formation signal components have been removed, standard NMR processing methods are applied to derive petrophysical properties of the formation (109) under investigation. In a preferred embodiment the NOPAPS method of this invention is practiced along with a data acquisition sequence, which can be used to further increase the logging speed of tool (106) or vertical resolutionof the measurements.
PCT/US2002/018652 2001-06-15 2002-06-11 System and methods for nmr signal processing without phase alternated pair stacking WO2002103395A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP02739852A EP1397705A4 (en) 2001-06-15 2002-06-11 System and methods for nmr signal processing without phase alternated pair stacking
AU2002312475A AU2002312475B2 (en) 2001-06-15 2002-06-11 System and methods for NMR signal processing without phase alternated pair stacking
CA2455383A CA2455383C (en) 2001-06-15 2002-06-11 System and methods for nmr signal processing without phase alternated pair stacking
BRPI0210438-5A BR0210438B1 (en) 2001-06-15 2002-06-11 METHODS FOR DETERMINING PROPERTIES OF GEOLOGICAL FORMATIONS USING NUCLEAR MAGNETIC RESONANCE (NMR) TECHNIQUES
NO20035568A NO20035568D0 (en) 2001-06-15 2003-12-12 System and methods for NMR signal processing without phase-switched pair stacking

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/882,316 2001-06-15
US09/882,316 US6525534B2 (en) 2001-06-15 2001-06-15 System and methods for NMR signal processing without phase alternated pair stacking

Publications (2)

Publication Number Publication Date
WO2002103395A2 WO2002103395A2 (en) 2002-12-27
WO2002103395A3 true WO2002103395A3 (en) 2003-04-10

Family

ID=25380324

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/018652 WO2002103395A2 (en) 2001-06-15 2002-06-11 System and methods for nmr signal processing without phase alternated pair stacking

Country Status (8)

Country Link
US (1) US6525534B2 (en)
EP (1) EP1397705A4 (en)
AR (1) AR034509A1 (en)
AU (1) AU2002312475B2 (en)
BR (1) BR0210438B1 (en)
CA (1) CA2455383C (en)
NO (1) NO20035568D0 (en)
WO (1) WO2002103395A2 (en)

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WO2004099817A2 (en) * 2003-05-02 2004-11-18 Halliburton Energy Services, Inc. Systems and methods for nmr logging
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WO2005067569A2 (en) * 2004-01-04 2005-07-28 Halliburton Energy Services, Inc. Method and apparatus for detecting hydrocarbons with nmr logs in wells drilled with oil-based muds
US7126333B2 (en) * 2004-04-19 2006-10-24 Baker Hughes Incorporated Method and apparatus for correcting ringing in NMR signals
US7034529B2 (en) * 2004-06-10 2006-04-25 Baker Hughes Incorporated Phase-alternated Carr-Purcell NMR echo sequence
US7225078B2 (en) * 2004-11-03 2007-05-29 Halliburton Energy Services, Inc. Method and system for predicting production of a well
US8970217B1 (en) 2010-04-14 2015-03-03 Hypres, Inc. System and method for noise reduction in magnetic resonance imaging
US9562989B2 (en) 2011-06-07 2017-02-07 Halliburton Energy Services, Inc. Rotational indexing to optimize sensing volume of a nuclear magnetic resonance logging tool
US9405035B2 (en) 2012-01-10 2016-08-02 Halliburton Energy Services, Inc. Enhanced transmitter and method for a nuclear magnetic resonance logging tool
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US11346974B2 (en) * 2018-09-11 2022-05-31 Schlumberger Technology Corporation Techniques for NMR logging with antenna arrays

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Also Published As

Publication number Publication date
NO20035568D0 (en) 2003-12-12
BR0210438A (en) 2004-08-17
EP1397705A4 (en) 2009-06-24
BR0210438B1 (en) 2014-04-22
US20020196017A1 (en) 2002-12-26
CA2455383A1 (en) 2002-12-27
AU2002312475B2 (en) 2008-03-06
CA2455383C (en) 2015-06-02
US6525534B2 (en) 2003-02-25
WO2002103395A2 (en) 2002-12-27
EP1397705A2 (en) 2004-03-17
AR034509A1 (en) 2004-02-25

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