GB930073A - Method and apparatus for logging boreholes - Google Patents

Method and apparatus for logging boreholes

Info

Publication number
GB930073A
GB930073A GB2663359A GB2663359A GB930073A GB 930073 A GB930073 A GB 930073A GB 2663359 A GB2663359 A GB 2663359A GB 2663359 A GB2663359 A GB 2663359A GB 930073 A GB930073 A GB 930073A
Authority
GB
United Kingdom
Prior art keywords
electrodes
borehole
measuring
pairs
current
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
GB2663359A
Inventor
Zoltan Barlai
Gabor Marfoldi
Istvan Kubina
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.)
KOOLAJIPARI TROSZT
Original Assignee
KOOLAJIPARI TROSZT
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 KOOLAJIPARI TROSZT filed Critical KOOLAJIPARI TROSZT
Priority to GB2663359A priority Critical patent/GB930073A/en
Publication of GB930073A publication Critical patent/GB930073A/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
    • G01V3/20—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current
    • G01V3/24—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current using ac

Landscapes

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

Abstract

930,073. Determining characteristics of earth strata. KOOLAJIPARI TROSZT. Aug. 4, 1959, No. 26633/59. Class 37. A method of logging a borehole comprises feeding sinusoidal alternating current through the ground, the current being maintained constant by a resistor located in the borehole, the potentials between one or more pairs of measuring electrodes being determined by phasesensitive detectors. As shown, generators 1, 1<SP>1</SP> feed alternating currents at audio frequencies f, f<SP>1</SP> into the earth via electrodes A, A<SP>1</SP>. Current limiting resistors are located in the borehole adjacent electrodes A, A<SP>1</SP> so as to minimize errors due to cable reactance. The resistivity at different strata is determined by measuring the voltages between electrodes M, N on the one hand and M<SP>1</SP>, N<SP>1</SP> on the other by means of a phase and frequency-sensitive amplifiers 2, 2<SP>1</SP>, each coupled to a recording apparetus. The natural potentials arising in the borehole may be simultaneously recorded. Isolating resistors R, R<SP>1</SP> are provided. The pairs of measuring electrodes may be located in two or more sondes.
GB2663359A 1959-08-04 1959-08-04 Method and apparatus for logging boreholes Expired GB930073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2663359A GB930073A (en) 1959-08-04 1959-08-04 Method and apparatus for logging boreholes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2663359A GB930073A (en) 1959-08-04 1959-08-04 Method and apparatus for logging boreholes

Publications (1)

Publication Number Publication Date
GB930073A true GB930073A (en) 1963-07-03

Family

ID=10246719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2663359A Expired GB930073A (en) 1959-08-04 1959-08-04 Method and apparatus for logging boreholes

Country Status (1)

Country Link
GB (1) GB930073A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219234A2 (en) * 1985-09-30 1987-04-22 Mobil Oil Corporation Method for identifying complex lithologies of subsurface formations
EP1355171A1 (en) * 2002-04-17 2003-10-22 Services Petroliers Schlumberger Phase discrimination for micro electrical measurement in non-conductive fluid

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219234A2 (en) * 1985-09-30 1987-04-22 Mobil Oil Corporation Method for identifying complex lithologies of subsurface formations
EP0219234A3 (en) * 1985-09-30 1988-01-13 Mobil Oil Corporation Method for identifying complex lithologies of subsurface formations
EP1355171A1 (en) * 2002-04-17 2003-10-22 Services Petroliers Schlumberger Phase discrimination for micro electrical measurement in non-conductive fluid
WO2003087883A1 (en) * 2002-04-17 2003-10-23 Services Petroliers Schlumberger Phase discrimination for micro electrical measurement in non-conductive fluid
US7119544B2 (en) 2002-04-17 2006-10-10 Schlumberger Technology Corporation Method and a tool for electrically investigating a wall of a borehole in a geologic formation

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