FR2185801A1 - Nuclear magnetism well logging - by establishing free precession of chosen nuclei - Google Patents

Nuclear magnetism well logging - by establishing free precession of chosen nuclei

Info

Publication number
FR2185801A1
FR2185801A1 FR7218885A FR7218885A FR2185801A1 FR 2185801 A1 FR2185801 A1 FR 2185801A1 FR 7218885 A FR7218885 A FR 7218885A FR 7218885 A FR7218885 A FR 7218885A FR 2185801 A1 FR2185801 A1 FR 2185801A1
Authority
FR
France
Prior art keywords
field
nuclei
chosen
well logging
nuclear magnetism
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
FR7218885A
Other languages
French (fr)
Other versions
FR2185801B1 (en
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
Priority to FR7218885A priority Critical patent/FR2185801A1/en
Publication of FR2185801A1 publication Critical patent/FR2185801A1/en
Application granted granted Critical
Publication of FR2185801B1 publication Critical patent/FR2185801B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/32—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

A nuclear magnetism well logging tool simultaneously establishes a strong DC magnetic field, to polarise chosen nuclei, and an AC magnetic field in a direction at right-angles to the earth's field and at a frequency corresponding to the Larmor precession frequency of the chosen nuclei. By terminating the DC field adiabatically over a period less than the thermal relaxation time of the chosen nuclei, the latter are swept into driven resonance in the AC field and when that field is then abruptly terminated the nuclei precess freely about the earth's magnetic field and a characteristic of the free precession is monitored.
FR7218885A 1972-05-26 1972-05-26 Nuclear magnetism well logging - by establishing free precession of chosen nuclei Granted FR2185801A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7218885A FR2185801A1 (en) 1972-05-26 1972-05-26 Nuclear magnetism well logging - by establishing free precession of chosen nuclei

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7218885A FR2185801A1 (en) 1972-05-26 1972-05-26 Nuclear magnetism well logging - by establishing free precession of chosen nuclei

Publications (2)

Publication Number Publication Date
FR2185801A1 true FR2185801A1 (en) 1974-01-04
FR2185801B1 FR2185801B1 (en) 1975-03-28

Family

ID=9099160

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7218885A Granted FR2185801A1 (en) 1972-05-26 1972-05-26 Nuclear magnetism well logging - by establishing free precession of chosen nuclei

Country Status (1)

Country Link
FR (1) FR2185801A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275931A (en) * 1962-09-10 1966-09-27 Phillips Petroleum Co Method of nuclear magnetic resonance well logging
US3479579A (en) * 1966-12-06 1969-11-18 Schlumberger Technology Corp Nuclear magnetism signal analyzing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275931A (en) * 1962-09-10 1966-09-27 Phillips Petroleum Co Method of nuclear magnetic resonance well logging
US3479579A (en) * 1966-12-06 1969-11-18 Schlumberger Technology Corp Nuclear magnetism signal analyzing system

Also Published As

Publication number Publication date
FR2185801B1 (en) 1975-03-28

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