FR2116702A5 - Borehole magnetic susceptibility logging - appt - Google Patents

Borehole magnetic susceptibility logging - appt

Info

Publication number
FR2116702A5
FR2116702A5 FR7043660A FR7043660A FR2116702A5 FR 2116702 A5 FR2116702 A5 FR 2116702A5 FR 7043660 A FR7043660 A FR 7043660A FR 7043660 A FR7043660 A FR 7043660A FR 2116702 A5 FR2116702 A5 FR 2116702A5
Authority
FR
France
Prior art keywords
coils
transmitter
appt
nulling
receiver
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
FR7043660A
Other languages
French (fr)
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 FR7043660A priority Critical patent/FR2116702A5/en
Application granted granted Critical
Publication of FR2116702A5 publication Critical patent/FR2116702A5/en
Expired 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
    • G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Appt. includes air core transmitter and receiver coils plus auxiliary air core nulling coils. A compensated magnetic induction circuit is employed for nulling a major portion of the receiver coil signals, in order that the changes caused by magnetic property change in the surrounding borehole, may be readily detected. The auxiliary nulling coils are pancake shaped and are located outside the fields of the transmitter and receiver coils. But they are located on the logging tool so that they are subject to the same ambient conditions as are the transmitter and receiver coils.
FR7043660A 1970-12-04 1970-12-04 Borehole magnetic susceptibility logging - appt Expired FR2116702A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7043660A FR2116702A5 (en) 1970-12-04 1970-12-04 Borehole magnetic susceptibility logging - appt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7043660A FR2116702A5 (en) 1970-12-04 1970-12-04 Borehole magnetic susceptibility logging - appt

Publications (1)

Publication Number Publication Date
FR2116702A5 true FR2116702A5 (en) 1972-07-21

Family

ID=9065223

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7043660A Expired FR2116702A5 (en) 1970-12-04 1970-12-04 Borehole magnetic susceptibility logging - appt

Country Status (1)

Country Link
FR (1) FR2116702A5 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse