CA2289134A1 - Formation density measurement utilizing pulsed neutrons - Google Patents

Formation density measurement utilizing pulsed neutrons Download PDF

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Publication number
CA2289134A1
CA2289134A1 CA002289134A CA2289134A CA2289134A1 CA 2289134 A1 CA2289134 A1 CA 2289134A1 CA 002289134 A CA002289134 A CA 002289134A CA 2289134 A CA2289134 A CA 2289134A CA 2289134 A1 CA2289134 A1 CA 2289134A1
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CA
Canada
Prior art keywords
gamma
formation
neutron source
fast
gamma ray
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
CA002289134A
Other languages
French (fr)
Other versions
CA2289134C (en
Inventor
Richard C. Odom
Richard W. Streeter
Robert D. Wilson
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.)
Precision Energy Services Inc
Original Assignee
Computalog U.S.A., Inc.
Richard C. Odom
Richard W. Streeter
Robert D. Wilson
Computalog Research, Inc.
Precision Energy Services, 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 Computalog U.S.A., Inc., Richard C. Odom, Richard W. Streeter, Robert D. Wilson, Computalog Research, Inc., Precision Energy Services, Inc. filed Critical Computalog U.S.A., Inc.
Publication of CA2289134A1 publication Critical patent/CA2289134A1/en
Application granted granted Critical
Publication of CA2289134C publication Critical patent/CA2289134C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G01V5/12—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 using gamma or X-ray sources
    • 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
    • G01V5/10—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 using neutron sources
    • G01V5/104—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 using neutron sources and detecting secondary Y-rays as well as reflected or back-scattered neutrons

Abstract

A device for measuring the density of a formation uses a high-energy pulsed neutron source which induces gamma rays in the formation, and determines a gamma diffusion length of the formation based on the attenuation of gamma rays produced by inelastic scattering of fast neutrons. The borehole tool houses the neutron source along with a near gamma ray detector and a fan gamma ray detector. The gamma ray detectors are located at different distances from the fast neutron source and spaced sufficiently from the fast neutron source such that dependence of inelastic gamma counts on fast neutron transport and gamma production of the formation is substantially reduced. Gamma ray events can be sorted and counted in time- and energy-dependent bins. The present invention has several advantages over gamma-gamma logging, including deeper penetration of gamma, and is also superior over systems which measure, e.g., hydrogen-based porosity.
CA002289134A 1997-06-19 1998-01-29 Formation density measurement utilizing pulsed neutrons Expired - Lifetime CA2289134C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/878,545 1997-06-19
US08/878,545 US5900627A (en) 1997-06-19 1997-06-19 Formation density measurement utilizing pulse neutrons
PCT/US1998/001629 WO1998058278A1 (en) 1997-06-19 1998-01-29 Formation density measurement utilizing pulsed neutrons

Publications (2)

Publication Number Publication Date
CA2289134A1 true CA2289134A1 (en) 1998-12-23
CA2289134C CA2289134C (en) 2005-11-29

Family

ID=25372247

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002289134A Expired - Lifetime CA2289134C (en) 1997-06-19 1998-01-29 Formation density measurement utilizing pulsed neutrons

Country Status (7)

Country Link
US (1) US5900627A (en)
EP (1) EP1119781B1 (en)
AU (1) AU733374C (en)
CA (1) CA2289134C (en)
DE (2) DE69840456D1 (en)
NO (1) NO322950B1 (en)
WO (1) WO1998058278A1 (en)

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US6754586B1 (en) * 2003-03-28 2004-06-22 Schlumberger Technology Corporation Apparatus and methods for monitoring output from pulsed neutron sources
US8050866B2 (en) * 2003-09-25 2011-11-01 Halliburton Energy Services, Inc. Pulsed-neutron formation density
US7117092B2 (en) * 2003-09-25 2006-10-03 Halliburton Energy Services, Inc. Pulsed-neutron formation density
US7294829B2 (en) * 2005-04-27 2007-11-13 Baker Hughes Incorporated Method and apparatus for an improved formation density indicator using pulsed neutron instruments
CN100455768C (en) * 2005-06-13 2009-01-28 中国石油大学(北京) Method for identifying stratum density at intervals of hole enlargement
US7613665B2 (en) * 2005-06-24 2009-11-03 Halliburton Energy Services, Inc. Ensembles of neural networks with different input sets
US7587373B2 (en) * 2005-06-24 2009-09-08 Halliburton Energy Services, Inc. Neural network based well log synthesis with reduced usage of radioisotopic sources
US7372018B2 (en) * 2005-07-26 2008-05-13 Baker Hughes Incorporated Determination of gas pressure and saturation simultaneously
US7491929B2 (en) * 2006-05-01 2009-02-17 Halliburton Energy Services, Inc. Method and related system of pulsed neutron logging
US8065244B2 (en) * 2007-03-14 2011-11-22 Halliburton Energy Services, Inc. Neural-network based surrogate model construction methods and applications thereof
US7791017B2 (en) * 2007-07-23 2010-09-07 Schlumberger Technology Corporation Method to simultaneously determine pore hydrocarbon density and water saturation from pulsed neutron measurements
CA2662543C (en) * 2007-08-14 2012-08-28 Halliburton Energy Services, Inc. Determining formation characteristics
DE102007051550A1 (en) * 2007-10-29 2009-04-30 Robert Bosch Gmbh Plunger for a solenoid valve and a method for marking plungers for solenoid valves
US10061055B2 (en) 2008-06-25 2018-08-28 Schlumberger Technology Corporation Absolute elemental concentrations from nuclear spectroscopy
US7818128B2 (en) * 2008-07-01 2010-10-19 Schlumberger Technology Corporation Forward models for gamma ray measurement analysis of subterranean formations
GB2468234B (en) * 2008-09-30 2012-11-21 Halliburton Energy Serv Inc Systems and methods for evaluating formations having unknown or mixed salinity
WO2010039122A1 (en) * 2008-09-30 2010-04-08 Halliburton Energy Services, Inc. Salt concentration logging systems and methods
US8346481B2 (en) * 2008-12-15 2013-01-01 Halliburton Energy Services, Inc. Method and system of determining a value indicative of gas saturation of a formation
US8436294B2 (en) * 2009-04-07 2013-05-07 Baker Hughes Incorporated Method for taking gamma-gamma density measurements
WO2010118119A2 (en) * 2009-04-07 2010-10-14 Baker Hughes Incorporated Gamma ray generator
US9897719B2 (en) * 2009-05-22 2018-02-20 Schlumberger Technology Corporation Optimization of neutron-gamma tools for inelastic-gamma ray logging
US10041343B2 (en) 2009-06-02 2018-08-07 Halliburton Energy Services, Inc. Micro-sonic density imaging while drilling systems and methods
US8471197B2 (en) * 2009-06-30 2013-06-25 Baker Hughes Incorporated Pulsed neutron based monitoring of CO2 in enhanced recovery and sequestration projects
US8853618B2 (en) * 2010-01-28 2014-10-07 Baker Hughes Incorporated Time dependent measurement of formation properties using pulsed neutron generators
US8700333B2 (en) * 2010-02-01 2014-04-15 Baker Hughes Incorporated Apparatus and algorithm for measuring formation bulk density
US9658361B2 (en) * 2010-02-01 2017-05-23 Baker Hughes Incorporated Lithology pair ratio: a ratio-based lithology indicator using pair production
EP2580611A1 (en) 2010-07-21 2013-04-17 Halliburton Energy Services, Inc. Method and system of determining a parameter associated with a formation corrected for neutrons produced
US9057794B2 (en) * 2010-08-26 2015-06-16 Schlumberger Technology Corporation Method for measuring subterranean formation density using a neutron generator
US8692182B2 (en) 2010-10-29 2014-04-08 Baker Hughes Incorporated Ruggedized high temperature compatible radiation detector
MX2013006661A (en) * 2010-12-17 2013-09-16 Schlumberger Technology Bv Gas detection and quantification method using a pulsed neutron logging tool.
US9360585B2 (en) 2011-05-23 2016-06-07 Schlumberger Technology Corporation Borehole independent neutron porosity measurement
US20120326017A1 (en) * 2011-06-22 2012-12-27 Baker Hughes Incorporated Method of calculating formation characteristics
GB2507897B (en) * 2011-07-20 2017-06-07 Halliburton Energy Services Inc Method and system of determining a value indicative of gas saturation of a formation
WO2013096387A1 (en) * 2011-12-21 2013-06-27 Services Petroliers Schlumberger Systems and methods for determining property of a geological formation from gravitational potential difference
US9335437B2 (en) * 2014-07-07 2016-05-10 Schlumberger Technology Corporation Casing inspection using pulsed neutron measurements
US9835741B1 (en) * 2014-07-09 2017-12-05 National Technology & Engineering Solutions Of Sandia, Llc Single volume fission energy neutron detector
US9840912B2 (en) * 2014-10-28 2017-12-12 Halliburton Energy Services, Inc. Determining casing fluid capture cross section using gamma count rate ratio
BR112017014168A2 (en) 2015-03-17 2018-03-06 Halliburton Energy Services Inc method to evaluate cement in a wellbore and profiling tool to evaluate cement in a wellbore
US9599743B2 (en) * 2015-04-29 2017-03-21 Baker Hughes Incorporated Density measurements using detectors on a pulsed neutron measurement platform
CN106597560B (en) * 2016-11-30 2018-09-04 中国石油大学(华东) A kind of neutron gamma density logging method characterized using fast neutron field distribution
EP3707535B1 (en) 2017-11-08 2023-06-14 Baker Hughes Holdings Llc Evaluation of formation composition using neutron induced gamma spectroscopy tools
CN110469324B (en) * 2019-07-31 2022-11-01 中国石油天然气集团有限公司 Method for calculating stratum density based on pulse neutron logging
CN111638559B (en) * 2020-06-22 2022-12-13 中国石油大学(华东) Fast neutron scattering cross section characterization method based on pulse neutron logging
US11815478B2 (en) 2021-05-19 2023-11-14 Halliburton Energy Services, Inc. Through-tubing, cased-hole sealed material density evaluation using gamma ray measurements

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Also Published As

Publication number Publication date
CA2289134C (en) 2005-11-29
AU733374C (en) 2001-11-22
AU6252898A (en) 1999-01-04
NO996315L (en) 2000-02-16
DE1119781T1 (en) 2002-02-07
NO322950B1 (en) 2006-12-18
WO1998058278A1 (en) 1998-12-23
US5900627A (en) 1999-05-04
DE69840456D1 (en) 2009-02-26
EP1119781B1 (en) 2009-01-07
AU733374B2 (en) 2001-05-10
NO996315D0 (en) 1999-12-17
EP1119781A1 (en) 2001-08-01

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