FR2388269A1 - METHOD AND APPARATUS FOR DETERMINING THE POROSITY OF SOIL LAYERS - Google Patents

METHOD AND APPARATUS FOR DETERMINING THE POROSITY OF SOIL LAYERS

Info

Publication number
FR2388269A1
FR2388269A1 FR7739788A FR7739788A FR2388269A1 FR 2388269 A1 FR2388269 A1 FR 2388269A1 FR 7739788 A FR7739788 A FR 7739788A FR 7739788 A FR7739788 A FR 7739788A FR 2388269 A1 FR2388269 A1 FR 2388269A1
Authority
FR
France
Prior art keywords
fast
population
neutrons
ground
porosity
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
FR7739788A
Other languages
French (fr)
Other versions
FR2388269B1 (en
Inventor
Harry Davis Smith Jr
Michael Paul Smith
Ward Edward Schultz
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
Priority claimed from US05/789,058 external-priority patent/US4134011A/en
Priority claimed from US05/789,057 external-priority patent/US4122339A/en
Priority claimed from US05/789,059 external-priority patent/US4122340A/en
Application filed by Texaco Development Corp filed Critical Texaco Development Corp
Publication of FR2388269A1 publication Critical patent/FR2388269A1/en
Application granted granted Critical
Publication of FR2388269B1 publication Critical patent/FR2388269B1/fr
Granted 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
    • G01V5/104—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
    • G01V5/105—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 the neutron source being of the pulsed type

Abstract

Procédé et appareil pour la détermination de la porosité de couches de terrain par émission et mesure de l'énergie de neutrons. Le procédé consiste à irradier dans un trou de forage une couche de terrain par des neutrons rapides et à émettre un signal caractéristique représentatif de la population de neutrons rapides présents dans ce trou de forage à une certaine distance D1 de la source de neutrons rapides. De préférence, on détecte également la population de neutrons épithermiques à une distance D2 de la source de neutrons. On combine les signaux représentatifs de la population de neutrons rapides et de la population de neutrons épithermiques pour obtenir un signal de mesure de la porosité du terrain. L'appareil consiste en une sonde contenant une source de neutrons rapides et un détecteur de neutrons rapides et un détecteur de neutrons épithermiques. L'installation comporte en outre des moyens de traitement des signaux délivrés par les capteurs. Application à la prospection d'hydrocarbures dans le sol.Method and apparatus for determining the porosity of ground layers by emission and measurement of neutron energy. The method consists in irradiating a layer of ground in a borehole with fast neutrons and in emitting a characteristic signal representative of the population of fast neutrons present in this borehole at a certain distance D1 from the source of fast neutrons. Preferably, the population of epithermal neutrons is also detected at a distance D2 from the neutron source. The signals representative of the population of fast neutrons and of the population of epithermal neutrons are combined to obtain a signal for measuring the porosity of the ground. The apparatus consists of a probe containing a fast neutron source and a fast neutron detector and an epithermal neutron detector. The installation further comprises means for processing the signals delivered by the sensors. Application to the prospecting of hydrocarbons in the ground.

FR7739788A 1977-04-20 1977-12-30 METHOD AND APPARATUS FOR DETERMINING THE POROSITY OF SOIL LAYERS Granted FR2388269A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/789,058 US4134011A (en) 1977-04-20 1977-04-20 Earth formation porosity log using measurement of fast neutron energy spectrum
US05/789,057 US4122339A (en) 1977-04-20 1977-04-20 Earth formation pulsed neutron porosity logging system utilizing epithermal neutron and inelastic scattering gamma ray detectors
US05/789,059 US4122340A (en) 1977-04-20 1977-04-20 Pulsed neutron porosity logging system

Publications (2)

Publication Number Publication Date
FR2388269A1 true FR2388269A1 (en) 1978-11-17
FR2388269B1 FR2388269B1 (en) 1984-03-16

Family

ID=27419865

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7739788A Granted FR2388269A1 (en) 1977-04-20 1977-12-30 METHOD AND APPARATUS FOR DETERMINING THE POROSITY OF SOIL LAYERS

Country Status (9)

Country Link
AU (1) AU506516B2 (en)
BR (1) BR7801603A (en)
CA (1) CA1103814A (en)
DE (1) DE2756328A1 (en)
FR (1) FR2388269A1 (en)
GB (1) GB1582589A (en)
MX (1) MX4924E (en)
NO (1) NO147009C (en)
NZ (1) NZ185984A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184359A2 (en) * 1984-12-05 1986-06-11 Halliburton Company Measurement of earth porosity at a well

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006510033A (en) 2002-12-10 2006-03-23 コモンウェルス　サイエンティフィック　アンド　インダストリアル　リサーチ　オーガニゼーション Radiography equipment
DE102005039702A1 (en) * 2005-08-23 2007-04-26 IUT Institut für Umwelttechnologien GmbH Identifying substances with water by neutron back scattering involves irradiating substance with neutron source, recording/measuring thermalised and fast back-scattered neutrons, forming quotient for independence from geometric factors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971094A (en) * 1956-12-27 1961-02-07 Gulf Research Development Co Well logging
US3214587A (en) * 1961-05-12 1965-10-26 Dresser Ind Radioactivity well logging apparatus utilizing a scintillation detector
GB1065784A (en) * 1964-04-07 1967-04-19 Dresser Ind Improvements in or relating to method and apparatus for pulsed well logging
US3491238A (en) * 1966-08-16 1970-01-20 Mobil Oil Corp Porosity logging employing two thermal neutron detectors spaced relatively far from neutron source
US3691378A (en) * 1970-06-26 1972-09-12 Dresser Ind Simultaneous pulsed neutron well logging
FR2184989A1 (en) * 1972-05-17 1973-12-28 Texaco Development Corp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971094A (en) * 1956-12-27 1961-02-07 Gulf Research Development Co Well logging
US3214587A (en) * 1961-05-12 1965-10-26 Dresser Ind Radioactivity well logging apparatus utilizing a scintillation detector
GB1065784A (en) * 1964-04-07 1967-04-19 Dresser Ind Improvements in or relating to method and apparatus for pulsed well logging
US3491238A (en) * 1966-08-16 1970-01-20 Mobil Oil Corp Porosity logging employing two thermal neutron detectors spaced relatively far from neutron source
US3691378A (en) * 1970-06-26 1972-09-12 Dresser Ind Simultaneous pulsed neutron well logging
FR2184989A1 (en) * 1972-05-17 1973-12-28 Texaco Development Corp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/59 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184359A2 (en) * 1984-12-05 1986-06-11 Halliburton Company Measurement of earth porosity at a well
EP0184359A3 (en) * 1984-12-05 1987-08-26 Halliburton Company Measurement of earth porosity at a well

Also Published As

Publication number Publication date
NO774306L (en) 1978-10-23
CA1103814A (en) 1981-06-23
AU506516B2 (en) 1980-01-10
AU3159577A (en) 1979-07-05
NO147009B (en) 1982-10-04
NO147009C (en) 1983-01-12
FR2388269B1 (en) 1984-03-16
GB1582589A (en) 1981-01-14
MX4924E (en) 1983-01-03
DE2756328A1 (en) 1978-10-26
NZ185984A (en) 1981-10-19
BR7801603A (en) 1978-12-05

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