GB928583A - Improved method of and apparatus for borehole logging - Google Patents

Improved method of and apparatus for borehole logging

Info

Publication number
GB928583A
GB928583A GB272959A GB272959A GB928583A GB 928583 A GB928583 A GB 928583A GB 272959 A GB272959 A GB 272959A GB 272959 A GB272959 A GB 272959A GB 928583 A GB928583 A GB 928583A
Authority
GB
United Kingdom
Prior art keywords
electrodes
electrode
sonde
guard electrode
borehole
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
GB272959A
Inventor
Frederick Henry Mann
Philip Threadgold
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.)
BP PLC
Original Assignee
BP PLC
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 BP PLC filed Critical BP PLC
Priority to GB272959A priority Critical patent/GB928583A/en
Publication of GB928583A publication Critical patent/GB928583A/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

928,583. Geophysical surveying. BRITISH PETROLEUM CO. Ltd. March 15, 1960 [Jan. 26, 1959], No. 2728/59. Class 37. In a well logging arrangement for a borehole containing a conducting fluid, a substantial portion (more than one third) of the borehole wall is scanned by measuring successively and cyclically the currents to each of a group of electrodes disposed around the sonde periphery in a horizontal plane or by a rotating single electrode, the variations in current intensity being recorded. Square electrodes 12, Fig. 2, are mounted with their diagonals vertical and horizontal in, but insulated from, a guard electrode 10 and produce a narrow focused electric current beam. A transformer 21, Fig. 4, provides L.T. and H.T. power for the sub-surface equipment, and the guard electrode is fed via a current stabilizer 20, a rotary switch 22 connecting each electrode in turn to the guard electrode through the primary winding of a transformer 23, and the rest directly to the guard electrode. The value of the electrode current may be conveyed to modulate the intensity of a cathode-ray beam by a telemetering device 27 which may effect frequency transposition to return the signal to the surface over the same cable. The time base of the oscilloscope is synchronized with the rotary switch and the trace is photographed on a film which is moved across the trace in step with the vertical movement of the sonde in the borehole. The apparatus may be used in conjunction with the inclinometer described in Specification 838,061 the North pulse of which may be used to trigger the oscilloscope timebase. The signals may be stored in a magnetic drum for subsequent read out, may be used to make a plot on sensitized paper or may be conveyed to separate indicators corresponding to the electrodes for photographing. A number of layers of electrodes, or a number of longitudinally spaced electrodes may alternatively be used, the display arrangements being modified accordingly. Arrangements for improving beam focusing are discussed. Dimensions of the sonde are included in the Specification. Specification 833,990 also is referred to.
GB272959A 1959-01-26 1959-01-26 Improved method of and apparatus for borehole logging Expired GB928583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB272959A GB928583A (en) 1959-01-26 1959-01-26 Improved method of and apparatus for borehole logging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB272959A GB928583A (en) 1959-01-26 1959-01-26 Improved method of and apparatus for borehole logging

Publications (1)

Publication Number Publication Date
GB928583A true GB928583A (en) 1963-06-12

Family

ID=9744787

Family Applications (1)

Application Number Title Priority Date Filing Date
GB272959A Expired GB928583A (en) 1959-01-26 1959-01-26 Improved method of and apparatus for borehole logging

Country Status (1)

Country Link
GB (1) GB928583A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369626A (en) * 1965-10-23 1968-02-20 Mobil Oil Corp Methods of and apparatus for producing a visual record of physical conditions of materials traversed by a borehole
US3434568A (en) * 1966-09-30 1969-03-25 Mobil Oil Corp Three-dimensional display of borehole logs
US3464513A (en) * 1968-04-24 1969-09-02 Shell Oil Co Acoustic apparatus for mapping the surface characteristics of a borehole
FR2611920A1 (en) * 1987-02-25 1988-09-09 Centre Nat Rech Scient Device and method for electrical detection of subsurface fractures, from a borehole
EP0544584A1 (en) * 1991-11-28 1993-06-02 Schlumberger Limited Well logging method and apparatus using azimuthal electrodes
FR2686159A1 (en) * 1992-01-14 1993-07-16 Schlumberger Services Petrol METHOD AND DEVICE FOR DIAGRAPHY WITH PASSIVE AZIMUTAL ELECTRODES.
FR2687228A1 (en) * 1992-02-12 1993-08-13 Schlumberger Services Petrol METHOD AND DEVICE FOR DIAGRAPHY FOR THE STUDY OF GEOMETRIC CHARACTERISTICS OF A DRILLING.
US5396175A (en) * 1991-11-28 1995-03-07 Schlumberger Technology Corporation Method and apparatus for evaluating formation resistivity using focused annular and azimuthal electrodes
EP0759563A2 (en) * 1995-08-21 1997-02-26 Schlumberger Limited Apparatus and method for measuring the resistivity of underground formations
EP0863412B1 (en) * 1997-03-05 2004-04-28 Compagnie Du Sol Tube-system for electrical measurements
US7109719B2 (en) 2004-05-11 2006-09-19 Baker Hughes Incorporated Method and apparatus for azimuthal resistivity measurements in a borehole

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369626A (en) * 1965-10-23 1968-02-20 Mobil Oil Corp Methods of and apparatus for producing a visual record of physical conditions of materials traversed by a borehole
US3434568A (en) * 1966-09-30 1969-03-25 Mobil Oil Corp Three-dimensional display of borehole logs
US3464513A (en) * 1968-04-24 1969-09-02 Shell Oil Co Acoustic apparatus for mapping the surface characteristics of a borehole
FR2611920A1 (en) * 1987-02-25 1988-09-09 Centre Nat Rech Scient Device and method for electrical detection of subsurface fractures, from a borehole
EP0544584A1 (en) * 1991-11-28 1993-06-02 Schlumberger Limited Well logging method and apparatus using azimuthal electrodes
FR2684452A1 (en) * 1991-11-28 1993-06-04 Schlumberger Services Petrol METHOD AND DEVICE FOR AZIMUTAL ELECTRODE DIAGRAPHY.
AU665382B2 (en) * 1991-11-28 1996-01-04 Schlumberger Technology B.V. Well logging method and apparatus using azimuthal electrodes
US5399971A (en) * 1991-11-28 1995-03-21 Schlumberger Technology Corporation Method and apparatus for evaluating formation resistivity using focused annular and azimuthal electrodes
US5396175A (en) * 1991-11-28 1995-03-07 Schlumberger Technology Corporation Method and apparatus for evaluating formation resistivity using focused annular and azimuthal electrodes
US5343153A (en) * 1992-01-14 1994-08-30 Schlumberger Technology Corporation Well logging method and apparatus using passive azimuthal electrodes
EP0552088A1 (en) * 1992-01-14 1993-07-21 Schlumberger Limited Well logging method and apparatus using passive azimuthal electrodes
FR2686159A1 (en) * 1992-01-14 1993-07-16 Schlumberger Services Petrol METHOD AND DEVICE FOR DIAGRAPHY WITH PASSIVE AZIMUTAL ELECTRODES.
EP0556114A1 (en) * 1992-02-12 1993-08-18 Schlumberger Limited Logging method and apparatus for investigating geometrical characteristics of a borehole
FR2687228A1 (en) * 1992-02-12 1993-08-13 Schlumberger Services Petrol METHOD AND DEVICE FOR DIAGRAPHY FOR THE STUDY OF GEOMETRIC CHARACTERISTICS OF A DRILLING.
US5426368A (en) * 1992-02-12 1995-06-20 Schlumberger Technology Corporation Logging method and apparatus for investigating geometrical characteristics of a borehole and for investigating formation resistivity
AU666913B2 (en) * 1992-02-12 1996-02-29 Schlumberger Technology B.V. Logging method and apparatus for investigating geometrical characteristics of a borehole
EP0759563A2 (en) * 1995-08-21 1997-02-26 Schlumberger Limited Apparatus and method for measuring the resistivity of underground formations
EP0759563A3 (en) * 1995-08-21 1999-03-03 Schlumberger Limited Apparatus and method for measuring the resistivity of underground formations
AU716646B2 (en) * 1995-08-21 2000-03-02 Schlumberger Technology B.V. Apparatus and method for measuring the resistivity of underground formations
EP0863412B1 (en) * 1997-03-05 2004-04-28 Compagnie Du Sol Tube-system for electrical measurements
US7109719B2 (en) 2004-05-11 2006-09-19 Baker Hughes Incorporated Method and apparatus for azimuthal resistivity measurements in a borehole
CN100427968C (en) * 2004-05-11 2008-10-22 贝克休斯公司 Use of micro-resistivity apparatus to obtain shallow Rxo and deep azimuthal formation resistivity

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