ES406787A1 - Pulsed neutron logging system with gain compensation - Google Patents

Pulsed neutron logging system with gain compensation

Info

Publication number
ES406787A1
ES406787A1 ES406787A ES406787A ES406787A1 ES 406787 A1 ES406787 A1 ES 406787A1 ES 406787 A ES406787 A ES 406787A ES 406787 A ES406787 A ES 406787A ES 406787 A1 ES406787 A1 ES 406787A1
Authority
ES
Spain
Prior art keywords
error signal
gain
location
energy
gain compensation
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.)
Expired
Application number
ES406787A
Other languages
Spanish (es)
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.)
Texaco Development Corp
Original Assignee
Texaco Development Corp
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 Texaco Development Corp filed Critical Texaco Development Corp
Publication of ES406787A1 publication Critical patent/ES406787A1/en
Expired 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
    • 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
    • G01V5/101—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 the secondary Y-rays produced in the surrounding layers of the bore hole
    • G01V5/102—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 the secondary Y-rays produced in the surrounding layers of the bore hole the neutron source being of the pulsed type

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)
  • Geophysics And Detection Of Objects (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

An apparatus for controlling and linearizing the gain of a nuclear well-imaging system characterized by the composition of means to measure the gamma-ray energy spectrum produced by the terrestrial formations surrounding a borehole with a resolution sufficient to distinguish at least a recognizable energy maximum of known energy in said gamma ray energy spectrum; means for comparing the apparent location of said energy maximum with its known location and for generating an error signal proportional to the difference between its known location and its apparent location; and means for responding to said error signal to control the gain of said measurement means in order to minimize said error signal. (Machine-translation by Google Translate, not legally binding)
ES406787A 1971-09-20 1972-09-18 Pulsed neutron logging system with gain compensation Expired ES406787A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18191071A 1971-09-20 1971-09-20

Publications (1)

Publication Number Publication Date
ES406787A1 true ES406787A1 (en) 1975-11-01

Family

ID=22666321

Family Applications (1)

Application Number Title Priority Date Filing Date
ES406787A Expired ES406787A1 (en) 1971-09-20 1972-09-18 Pulsed neutron logging system with gain compensation

Country Status (12)

Country Link
JP (1) JPS559670B2 (en)
KR (1) KR780000747B1 (en)
AR (1) AR213058A1 (en)
AU (1) AU457489B2 (en)
BR (1) BR7206468D0 (en)
CA (1) CA963178A (en)
DE (1) DE2245833C3 (en)
DK (1) DK139919B (en)
ES (1) ES406787A1 (en)
FR (1) FR2153322B1 (en)
GB (1) GB1384099A (en)
MY (1) MY7800306A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110142U (en) * 1980-01-28 1981-08-26
FR2485752A1 (en) * 1980-06-25 1981-12-31 Schlumberger Prospection METHOD AND DEVICE FOR MEASURING GAMMA RAYS IN A SURVEY
JPS59207400A (en) * 1983-05-10 1984-11-24 株式会社彦間製作所 Detecting mechanism of load of lifting gear

Also Published As

Publication number Publication date
AU4607672A (en) 1974-03-07
DE2245833C3 (en) 1979-01-25
DE2245833A1 (en) 1973-04-12
FR2153322A1 (en) 1973-05-04
JPS559670B2 (en) 1980-03-11
AR213058A1 (en) 1978-12-15
GB1384099A (en) 1975-02-19
DE2245833B2 (en) 1978-06-01
JPS4838801A (en) 1973-06-07
DK139919C (en) 1979-10-15
DK139919B (en) 1979-05-14
AU457489B2 (en) 1975-01-30
MY7800306A (en) 1978-12-31
KR780000747B1 (en) 1978-12-30
BR7206468D0 (en) 1973-07-19
FR2153322B1 (en) 1976-05-21
CA963178A (en) 1975-02-18

Similar Documents

Publication Publication Date Title
IE39859B1 (en) Method and apparatus for determining the potassium uranium and thorium contents of a geological formation
ES455762A1 (en) Clay content determination by natural gamma ray spectrometry
GB1466031A (en) Natural gamma radiation borehole logging system
US3829686A (en) Pulsed neutron logging system with gain compensation
ES400416A1 (en) Radioactivity oil-water well logging utilizing neutron source
US3767921A (en) Well logging system with linearity control
GB965303A (en) Improvements in or relating to the determination of the ash content of coal
ES432642A1 (en) Neutron lifetime well logging methods and apparatus
ES220526A1 (en) Well logging apparatus
GB1281809A (en) Passive moisture meter
GB1232092A (en)
US3792253A (en) Method and apparatus for detection of copper
ES406787A1 (en) Pulsed neutron logging system with gain compensation
US3988581A (en) Radioactive well logging system with shale (boron) compensation by gamma ray build-up
AU469575B2 (en) Neutron measuring technique for investigating earth formations
US3939343A (en) Pulsed neutron logging system for inelastic scattering gamma rays with gain compensation
GB1180450A (en) Arrangements for Determining the Moisture Content of Solid Substances by means of Neutron Irradiation
ES329659A1 (en) Uranium detection device in the atmosphere. (Machine-translation by Google Translate, not legally binding)
Reginato et al. Temperature stabilization of gamma ray transmission equipment
GB1400182A (en) Device for testing soil
GB898799A (en) Means and process for the continuous measurement of moisture contents in materials, in particular in sinter mix
GB1364572A (en) Well logging method and apparatus
GB1248916A (en) Improvements in or relating to neutron radiography
FR2082318A5 (en) Neutron moisture detector - for exploring underground strata in a borehole, using radioactive sources
GB1298073A (en) Improvements in or relating to level detection