CA2202310A1 - Borehole invariant neutron porosity measurement system - Google Patents

Borehole invariant neutron porosity measurement system

Info

Publication number
CA2202310A1
CA2202310A1 CA002202310A CA2202310A CA2202310A1 CA 2202310 A1 CA2202310 A1 CA 2202310A1 CA 002202310 A CA002202310 A CA 002202310A CA 2202310 A CA2202310 A CA 2202310A CA 2202310 A1 CA2202310 A1 CA 2202310A1
Authority
CA
Canada
Prior art keywords
borehole
measurement system
neutron porosity
porosity measurement
invariant
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
CA002202310A
Other languages
French (fr)
Other versions
CA2202310C (en
Inventor
Michael L. Evans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schlumberger Canada Ltd
Original Assignee
Schlumberger Canada Ltd
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 Schlumberger Canada Ltd filed Critical Schlumberger Canada Ltd
Publication of CA2202310A1 publication Critical patent/CA2202310A1/en
Application granted granted Critical
Publication of CA2202310C publication Critical patent/CA2202310C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays

Abstract

This invention is directed toward the determination of porosities of earth formations penetrated by a borehole, and more specifically is directed toward the determination of porosities of earth formations while the borehole is being drilled.
Borehole invariant neutron porosity measurements are obtained using a borehole tool which provides the response of two detectors spaced axially at different spacings from a neutron source. No independent measure of borehole geometry is required to correct the resulting porosity measurements for variations in borehole size or variations of the position of the borehole tool within the borehole.
CA002202310A 1996-04-15 1997-04-10 Borehole invariant neutron porosity measurement system Expired - Fee Related CA2202310C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1599296P 1996-04-15 1996-04-15
US60/015,992 1996-04-15
US08/664,759 1996-06-17
US08/664,759 US5767510A (en) 1996-04-15 1996-06-17 Borehole invariant porosity measurement system

Publications (2)

Publication Number Publication Date
CA2202310A1 true CA2202310A1 (en) 1997-10-15
CA2202310C CA2202310C (en) 2002-07-02

Family

ID=26688034

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002202310A Expired - Fee Related CA2202310C (en) 1996-04-15 1997-04-10 Borehole invariant neutron porosity measurement system

Country Status (8)

Country Link
US (1) US5767510A (en)
EP (1) EP0802429B1 (en)
AU (1) AU724756B2 (en)
BR (1) BR9701793B1 (en)
CA (1) CA2202310C (en)
DE (1) DE69727724D1 (en)
GB (1) GB2314927B (en)
NO (1) NO318128B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6577697B2 (en) 1997-07-09 2003-06-10 Southwest Research Institute Field analysis of geological samples using delayed neutron activation analysis
US6285026B1 (en) 1999-03-30 2001-09-04 Schlumberger Technology Corporation Borehole caliper derived from neutron porosity measurements
US6167348A (en) * 1999-05-27 2000-12-26 Schlumberger Technology Corporation Method and apparatus for ascertaining a characteristic of a geological formation
US6648083B2 (en) 2000-11-02 2003-11-18 Schlumberger Technology Corporation Method and apparatus for measuring mud and formation properties downhole
US6495837B2 (en) 2001-03-14 2002-12-17 Computalog U.S.A, Inc. Geometrically optimized fast neutron detector
US6566657B2 (en) 2001-03-14 2003-05-20 Richard C. Odom Geometrically optimized fast neutron detector
US6639210B2 (en) * 2001-03-14 2003-10-28 Computalog U.S.A., Inc. Geometrically optimized fast neutron detector
US6738720B2 (en) * 2001-11-29 2004-05-18 Computalog U.S.A. Apparatus and methods for measurement of density of materials using a neutron source and two spectrometers
US7129477B2 (en) * 2002-04-03 2006-10-31 Baker Hughes Incorporated Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement
US6894274B2 (en) * 2002-12-11 2005-05-17 Pathfinder Energy Services, Inc. Estimation of formation porosity using water measurement
US7112783B2 (en) * 2003-09-08 2006-09-26 Schlumberger Technology Corporation Neutron measurement method for determining porosity of a formation surrounding a borehole
GB2414544C (en) * 2004-05-28 2010-03-22 Reeves Wireline Tech Ltd A method of compensating a density log
ATE434197T1 (en) * 2005-01-31 2009-07-15 Prad Res & Dev Nv METHOD FOR A BOREHOLE INVARIANT POROSIS MEASUREMENT
US7361886B2 (en) * 2005-02-28 2008-04-22 Schlumberger Technology Corporation Corrections of gamma-ray responses
US7365307B2 (en) * 2005-02-28 2008-04-29 Schlumberger Technology Corporation Sigma/porosity tools with neutron monitors
US7642507B2 (en) * 2005-02-28 2010-01-05 Schlumberger Technology Corporation Apparatus and methods for interlaced density and neutron measurements
US7294829B2 (en) * 2005-04-27 2007-11-13 Baker Hughes Incorporated Method and apparatus for an improved formation density indicator using pulsed neutron instruments
DE602006021294D1 (en) * 2006-07-24 2011-05-26 Prad Res & Dev Nv Method and apparatus for microimaging
US7667192B2 (en) * 2007-08-16 2010-02-23 Schlumberger Technology Corporation Thermal neutron porosity from neutron slowing-down length, formation thermal neutron capture cross section, and bulk density
WO2010118119A2 (en) * 2009-04-07 2010-10-14 Baker Hughes Incorporated Gamma ray generator
US8436294B2 (en) * 2009-04-07 2013-05-07 Baker Hughes Incorporated Method for taking gamma-gamma density measurements
US8310511B2 (en) * 2009-05-08 2012-11-13 Rohm Co., Ltd. Thermal printhead
US8853618B2 (en) * 2010-01-28 2014-10-07 Baker Hughes Incorporated Time dependent measurement of formation properties using pulsed neutron generators
US9031790B2 (en) * 2010-03-23 2015-05-12 Schlumberger Technology Corporation System and method for correction of borehole effects in a neutron porosity measurement
US9372277B2 (en) * 2010-04-21 2016-06-21 Schlumberger Technology Corporation Neutron porosity downhole tool with improved precision and reduced lithology effects
GB2527972B (en) 2010-05-04 2016-06-15 Smith International Method and apparatus for neutron logging using a position sensitive neutron detector
US9360585B2 (en) 2011-05-23 2016-06-07 Schlumberger Technology Corporation Borehole independent neutron porosity measurement
RU2624996C1 (en) * 2016-06-03 2017-07-11 Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт автоматики им. Н.Л. Духова" (ФГУП "ВНИИА") Downhole device for measurement of neutron porosity
RU2690095C1 (en) * 2018-01-24 2019-05-30 Федеральное Государственное Унитарное Предприятие "Всероссийский Научно-Исследовательский Институт Автоматики Им.Н.Л.Духова" (Фгуп "Внииа") Device for neutron porosity determination

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483376A (en) * 1966-08-03 1969-12-09 Schlumberger Technology Corp Two neutron detector earth formation porosity logging technique
CA1017464A (en) * 1973-05-01 1977-09-13 Schlumberger Canada Limited Two detector pulsed neutron porosity and water salinity apparatus and methods
US3971935A (en) * 1973-05-01 1976-07-27 Schlumberger Technology Corporation Two detector pulsed neutron porosity and water salinity apparatus and methods
US3942004A (en) * 1974-05-16 1976-03-02 Applied Inventions Corporation Dual spaced, borehole compensated neutron well logging instrument
US4384205A (en) * 1980-11-05 1983-05-17 Schlumberger Technology Corporation Neutron method and apparatus for determining total cross-section
US4423323A (en) * 1981-09-09 1983-12-27 Schlumberger Technology Corporation Neutron logging method and apparatus for determining a formation characteristic free of environmental effects
US4791797A (en) * 1986-03-24 1988-12-20 Nl Industries, Inc. Density neutron self-consistent caliper
US4910397A (en) * 1989-01-10 1990-03-20 Mobil Oil Corporation Pulsed neutron porosity logging
US4947683A (en) * 1989-08-03 1990-08-14 Halliburton Logging Services, Inc. Pulsed ultrasonic doppler borehole fluid measuring apparatus
US5377105A (en) * 1991-04-12 1994-12-27 Halliburton Logging Services Enhanced vertical resolution processing of dual-spaced neutron and density tools
EP0519675A1 (en) * 1991-06-18 1992-12-23 Halliburton Company Method and apparatus for correcting measurement-while-drilling porosity
US5175429A (en) * 1991-08-30 1992-12-29 Baker Hughes Incorporated Stand-off compensation for nuclear MWD measurement
US5272629A (en) * 1992-04-09 1993-12-21 Baker Hughes Incorporated Method for determining the slowing down length and the porosity of a formation surrounding a borehole

Also Published As

Publication number Publication date
EP0802429A3 (en) 2002-01-16
GB2314927B (en) 1998-06-24
CA2202310C (en) 2002-07-02
GB9707515D0 (en) 1997-06-04
NO318128B1 (en) 2005-02-07
EP0802429A2 (en) 1997-10-22
NO971628L (en) 1997-10-16
DE69727724D1 (en) 2004-04-01
US5767510A (en) 1998-06-16
AU724756B2 (en) 2000-09-28
AU1775297A (en) 1997-10-23
EP0802429B1 (en) 2004-02-25
GB2314927A (en) 1998-01-14
NO971628D0 (en) 1997-04-09
BR9701793B1 (en) 2008-11-18
BR9701793A (en) 1998-06-23

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Legal Events

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EEER Examination request
MKLA Lapsed

Effective date: 20160411