WO2011133363A3 - Neutron porosity downhole tool with improved precision and reduced lithology effects - Google Patents

Neutron porosity downhole tool with improved precision and reduced lithology effects Download PDF

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Publication number
WO2011133363A3
WO2011133363A3 PCT/US2011/032210 US2011032210W WO2011133363A3 WO 2011133363 A3 WO2011133363 A3 WO 2011133363A3 US 2011032210 W US2011032210 W US 2011032210W WO 2011133363 A3 WO2011133363 A3 WO 2011133363A3
Authority
WO
WIPO (PCT)
Prior art keywords
neutron
neutrons
subterranean formation
porosity
count
Prior art date
Application number
PCT/US2011/032210
Other languages
French (fr)
Other versions
WO2011133363A2 (en
Inventor
Peter Wraight
Bradley A. Roscoe
James Thornton
Original Assignee
Schlumberger Canada Limited
Schlumberger Technology B.V.
Prad Research And Development Limited
Services Petroliers Schlumberger
Schlumberger Holding Limited
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 Limited, Schlumberger Technology B.V., Prad Research And Development Limited, Services Petroliers Schlumberger, Schlumberger Holding Limited filed Critical Schlumberger Canada Limited
Priority to BR112012026673A priority Critical patent/BR112012026673A2/en
Priority to RU2012149430/28A priority patent/RU2515111C1/en
Priority to CA2795421A priority patent/CA2795421A1/en
Priority to MX2012012127A priority patent/MX2012012127A/en
Priority to EP11772446.8A priority patent/EP2548053A4/en
Publication of WO2011133363A2 publication Critical patent/WO2011133363A2/en
Publication of WO2011133363A3 publication Critical patent/WO2011133363A3/en

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
    • 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
    • G01V5/107—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 reflected or back-scattered neutrons

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  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Radiation (AREA)

Abstract

Systems and methods for neutron porosity well logging with high precision and reduced lithology effects are provided. In accordance with an embodiment, a downhole neutron porosity tool may include a neutron source, a neutron monitor, a neutron detector, and data processing circuitry. The neutron source may emit neutrons into a subterranean formation while the neutron monitor detects a count of neutrons proportional to the neutrons emitted. The neutron detector may detect a count of neutrons that scatters off the subterranean formation. The data processing circuitry may determine an environmentally corrected porosity of the subterranean formation based at least in part on the count rate of neutrons scattered off the subterranean formation normalized to the count rate of neutrons proportional to the neutrons emitted by the neutron source.
PCT/US2011/032210 2010-04-21 2011-04-13 Neutron porosity downhole tool with improved precision and reduced lithology effects WO2011133363A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR112012026673A BR112012026673A2 (en) 2010-04-21 2011-04-13 neutron porosity downhole tool, method, downhole tool, and neutron porosity system
RU2012149430/28A RU2515111C1 (en) 2010-04-21 2011-04-13 Neutron downhole device for measurement of porosity with increased accuracy and reduced lithological effects
CA2795421A CA2795421A1 (en) 2010-04-21 2011-04-13 Neutron porosity downhole tool with improved precision and reduced lithology effects
MX2012012127A MX2012012127A (en) 2010-04-21 2011-04-13 Neutron porosity downhole tool with improved precision and reduced lithology effects.
EP11772446.8A EP2548053A4 (en) 2010-04-21 2011-04-13 Neutron porosity downhole tool with improved precision and reduced lithology effects

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/764,814 US9372277B2 (en) 2010-04-21 2010-04-21 Neutron porosity downhole tool with improved precision and reduced lithology effects
US12/764,814 2010-04-21

Publications (2)

Publication Number Publication Date
WO2011133363A2 WO2011133363A2 (en) 2011-10-27
WO2011133363A3 true WO2011133363A3 (en) 2012-02-02

Family

ID=44815009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/032210 WO2011133363A2 (en) 2010-04-21 2011-04-13 Neutron porosity downhole tool with improved precision and reduced lithology effects

Country Status (7)

Country Link
US (1) US9372277B2 (en)
EP (1) EP2548053A4 (en)
BR (1) BR112012026673A2 (en)
CA (1) CA2795421A1 (en)
MX (1) MX2012012127A (en)
RU (1) RU2515111C1 (en)
WO (1) WO2011133363A2 (en)

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US20130304396A1 (en) * 2012-05-08 2013-11-14 Sean E. Walston Online statistical analysis of neutron time intervals using bayesian probability analysis
US9069095B1 (en) * 2013-12-16 2015-06-30 Schlumberger Technology Corporation Monitoring the output of a radiation generator
US9341737B2 (en) * 2014-02-11 2016-05-17 Baker Hughes Incorporated Measuring total, epithermal and thermal neutron formation porosities with one single set of neutron detectors and a pulsed neutron generator
US9274245B2 (en) 2014-05-30 2016-03-01 Baker Hughes Incorporated Measurement technique utilizing novel radiation detectors in and near pulsed neutron generator tubes for well logging applications using solid state materials
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
WO2018057035A1 (en) 2016-09-26 2018-03-29 Halliburton Energy Services, Inc. Neutron porosity log casing thickness corrections
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
CN110439545B (en) * 2019-08-02 2023-04-25 中国石油天然气集团有限公司 Environment correction method for logging instrument with neutron porosity of controllable source while drilling
CN116500694B (en) * 2023-06-28 2023-09-01 中海油田服务股份有限公司 Post-sleeve physical quantity inversion method, post-sleeve physical quantity inversion device, computing equipment and storage medium

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US4794792A (en) * 1986-10-06 1989-01-03 Schlumberger Technology Corporation Method for determining formation characteristics with enhanced vertical resolution
US5051581A (en) * 1990-05-01 1991-09-24 Schlumberger Technology Corporation Method and apparatus for epithermal neutron porosity well logging
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US7365307B2 (en) * 2005-02-28 2008-04-29 Schlumberger Technology Corporation Sigma/porosity tools with neutron monitors

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US4909075A (en) * 1986-10-06 1990-03-20 Schlumberger Technology Corporation Method for determining formation characteristics with enhanced statistical precision without degrading the vertical resolution or with enhanced vertical resolution
US4786796A (en) 1986-10-06 1988-11-22 Schlumberger Technology Corporation Method for determining formation characteristics with enhanced vertical resolution
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US4794792A (en) * 1986-10-06 1989-01-03 Schlumberger Technology Corporation Method for determining formation characteristics with enhanced vertical resolution
US5051581A (en) * 1990-05-01 1991-09-24 Schlumberger Technology Corporation Method and apparatus for epithermal neutron porosity well logging
US7148471B2 (en) * 2001-05-18 2006-12-12 Schlumberger Technology Corporation Well logging apparatus and method for measuring formation properties
US7365307B2 (en) * 2005-02-28 2008-04-29 Schlumberger Technology Corporation Sigma/porosity tools with neutron monitors

Non-Patent Citations (1)

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Title
See also references of EP2548053A4 *

Also Published As

Publication number Publication date
EP2548053A2 (en) 2013-01-23
MX2012012127A (en) 2012-11-22
CA2795421A1 (en) 2011-10-27
RU2515111C1 (en) 2014-05-10
US9372277B2 (en) 2016-06-21
WO2011133363A2 (en) 2011-10-27
US20110260044A1 (en) 2011-10-27
EP2548053A4 (en) 2013-10-30
BR112012026673A2 (en) 2017-10-10

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