GB636075A - Improvements in well logging systems - Google Patents

Improvements in well logging systems

Info

Publication number
GB636075A
GB636075A GB28887/47A GB2888747A GB636075A GB 636075 A GB636075 A GB 636075A GB 28887/47 A GB28887/47 A GB 28887/47A GB 2888747 A GB2888747 A GB 2888747A GB 636075 A GB636075 A GB 636075A
Authority
GB
United Kingdom
Prior art keywords
electrodes
pair
pairs
electrical
electrode
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
GB28887/47A
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.)
Services Petroliers Schlumberger SA
Original Assignee
Societe de Prospection Electrique Schlumberger SA
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 Societe de Prospection Electrique Schlumberger SA filed Critical Societe de Prospection Electrique Schlumberger SA
Publication of GB636075A publication Critical patent/GB636075A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

636,075. Electrical prospecting. SOC. DE PROSPECTION ELECTRIQUE PROCEDES SCHLUMBERGER. Oct. 29, 1947, No. 28887. Convention date, Oct. 29, 1946. [Class 37] Electrical well-logging apparatus, for determining the boundaries of electrically-resistive earth formations through which the borehole has passed, comprises two pairs of electrodes A, B and A<1>, B<1> employed in a symmetrical array about a reference electrode M. Each pair of electrodes is approximately in vertical symmetry about the reference electrode, one pair being at a greater distance from this electrode than the other pair. The electrodes in each pair are electrically connected together and the two pairs are connected to the respective terminals of a source of electrical energy 13, whilst the reference electrode may be connected to one terminal of a circuit including electrical recording means 15, the other terminal being grounded at the surface 16. The source of electrical energy and the recording means may be interchanged. In a modified form, several measuring circuits, each consisting of two pairs of electrodes, are symmetrically disposed at varying distances about an electrode of a current-emitting circuit.
GB28887/47A 1946-10-29 1947-10-29 Improvements in well logging systems Expired GB636075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR939401T 1946-10-29

Publications (1)

Publication Number Publication Date
GB636075A true GB636075A (en) 1950-04-19

Family

ID=9458535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28887/47A Expired GB636075A (en) 1946-10-29 1947-10-29 Improvements in well logging systems

Country Status (4)

Country Link
DE (1) DE843235C (en)
DK (1) DK70328C (en)
FR (1) FR939401A (en)
GB (1) GB636075A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002075364A1 (en) * 2001-03-20 2002-09-26 Shell Internationale Research Maatschappij B.V. Detecting a boundary in a formation
FR2853087A1 (en) * 2003-03-27 2004-10-01 Jerome Bourg Device for locating aquiferous layers comprises galvanometer placed on surface

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1181339B (en) * 1951-11-20 1964-11-12 Schlumberger Well Surv Corp Device for determining the electrical resistance of earth formations surrounding a borehole
DE102004035001A1 (en) * 2004-07-20 2006-03-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Material e.g. cranial bone, processing cutting device for medical application, has impedance measuring instrument for measuring electrical impedance around cutter head tip, such that remaining thickness of remaining material is measured

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002075364A1 (en) * 2001-03-20 2002-09-26 Shell Internationale Research Maatschappij B.V. Detecting a boundary in a formation
US6856909B2 (en) 2001-03-20 2005-02-15 Shell Oil Company Detecting a boundary in a formation
AU2002304768B2 (en) * 2001-03-20 2006-11-23 Shell Internationale Research Maatschappij B.V. Detecting a boundary in a formation
FR2853087A1 (en) * 2003-03-27 2004-10-01 Jerome Bourg Device for locating aquiferous layers comprises galvanometer placed on surface

Also Published As

Publication number Publication date
DE843235C (en) 1952-07-07
FR939401A (en) 1948-11-15
DK70328C (en) 1949-12-12

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