NO924168L - Anordning og fremgangsmaate til nukleaer logging av et borehull - Google Patents

Anordning og fremgangsmaate til nukleaer logging av et borehull

Info

Publication number
NO924168L
NO924168L NO92924168A NO924168A NO924168L NO 924168 L NO924168 L NO 924168L NO 92924168 A NO92924168 A NO 92924168A NO 924168 A NO924168 A NO 924168A NO 924168 L NO924168 L NO 924168L
Authority
NO
Norway
Prior art keywords
neutron
spectrum
gaussian curve
data processing
new data
Prior art date
Application number
NO92924168A
Other languages
English (en)
Other versions
NO924168D0 (no
Inventor
David M Schneider
Original Assignee
Baker Hughes 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 Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of NO924168D0 publication Critical patent/NO924168D0/no
Publication of NO924168L publication Critical patent/NO924168L/no

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 ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of ionising 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 ionising 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 ionising 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

Landscapes

  • 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)
  • Measurement Of Radiation (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

En fremgangsmåte og anordning til nukleær logging, og særlig logging av nøytronporøsitet er beskrevet. I henhold til oppfinnelsen blir et par litiumdetektorer l avstand fra hverandre, fortrinnsvis med Ll6I-krystall eller Li6 dopet glass benyttet til å påvise nøytroner som er sendt ut fra en borehullformasjon som logges. I tillegg benyttes en ny databehandling til å bestemme nøytrontellingen fra det spektrum som utvikles av litiumdetektorene. Denne nye databehandling omfatter tilslutning av en Gaussisk kurve til nøytrontoppen i spekteret. Den Gausslske kurve innbefatter ikke absorpsjonstoppen for hydrogen i spekteret. Arealet under denne Gaussiske kurve representerer nøytrontell- ingen. Det oppnås således en mer nøyaktig nøytron- telling som ikke inneholder gammastråler som skyldes hydrogenabsorpsjonen.
NO92924168A 1991-11-01 1992-10-29 Anordning og fremgangsmaate til nukleaer logging av et borehull NO924168L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/786,728 US5196698A (en) 1991-11-01 1991-11-01 Method and apparatus for nuclear logging using lithium detector assemblies

Publications (2)

Publication Number Publication Date
NO924168D0 NO924168D0 (no) 1992-10-29
NO924168L true NO924168L (no) 1993-05-03

Family

ID=25139432

Family Applications (1)

Application Number Title Priority Date Filing Date
NO92924168A NO924168L (no) 1991-11-01 1992-10-29 Anordning og fremgangsmaate til nukleaer logging av et borehull

Country Status (3)

Country Link
US (1) US5196698A (no)
GB (1) GB2261068B (no)
NO (1) NO924168L (no)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6431073B1 (en) * 1998-01-14 2002-08-13 North American Industrial Services, Inc. Device, system and method for on-line explosive deslagging
US6566649B1 (en) 2000-05-26 2003-05-20 Precision Drilling Technology Services Group Inc. Standoff compensation for nuclear measurements
US6700115B2 (en) 2000-05-26 2004-03-02 Precision Drilling Technology Services Group Inc. Standoff compensation for nuclear measurements
US6590202B2 (en) 2000-05-26 2003-07-08 Precision Drilling Technology Services Group Inc. Standoff compensation for nuclear measurements
US7482578B2 (en) * 2006-06-12 2009-01-27 Lonkar Services, Ltd. Gamma radiation spectral logging system and method for processing gamma radiation spectra
EP2368137A1 (en) * 2008-12-05 2011-09-28 BAE Systems PLC Radiation detector with resilient, opaque coating applied to the detector element
BRPI1016011A2 (pt) * 2009-06-29 2016-04-26 Baker Hugues Inc uso de cristais sólidos como tubos de luz contínua para convergir luz para janela pmt.
US8378292B1 (en) 2011-07-28 2013-02-19 Sondex Wireline Limited Neutron porosity measurement devices with semiconductor neutron detection cells and methods
JP5665783B2 (ja) * 2012-02-29 2015-02-04 株式会社東芝 中性子測定装置およびその測定方法
CN103235350B (zh) * 2013-04-12 2016-01-27 中国海洋石油总公司 放射性测井仪器稳定性检测及刻度方法与装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940610A (en) * 1974-02-15 1976-02-24 Mobil Oil Corporation Natural gamma radiation borehole logging system
US4136278A (en) * 1977-07-14 1979-01-23 Dresser Industries, Inc. Method and apparatus for pulsed neutron spectral analysis using spectral stripping
US4271356A (en) * 1979-05-24 1981-06-02 Dresser Industries, Inc. Method and apparatus for natural gamma ray spectrum analysis using microprocessor stripper
US4379229A (en) * 1980-12-30 1983-04-05 Mobil Oil Corporation Measuring of gamma-ray energy due to thermal neutron capture of copper and nickel
US4587424A (en) * 1983-08-22 1986-05-06 Schlumberger Technology Corporation Method for investigating the composition of an earth formation traversed by a borehole
US5144126A (en) * 1990-04-17 1992-09-01 Teleco Oilfied Services Inc. Apparatus for nuclear logging employing sub wall mounted detectors and electronics, and modular connector assemblies
US5083124A (en) * 1990-04-17 1992-01-21 Teleco Oilfield Services Inc. Nuclear logging tool electronics including programmable gain amplifier and peak detection circuits

Also Published As

Publication number Publication date
US5196698A (en) 1993-03-23
GB9221486D0 (en) 1992-11-25
GB2261068A (en) 1993-05-05
NO924168D0 (no) 1992-10-29
GB2261068B (en) 1995-05-03

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