GB636075A - Improvements in well logging systems - Google Patents
Improvements in well logging systemsInfo
- 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
Links
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 abstract 1
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)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (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.
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)
| 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)
| 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 |
-
1946
- 1946-10-29 FR FR939401D patent/FR939401A/en not_active Expired
-
1947
- 1947-10-23 DK DK393547AA patent/DK70328C/en active
- 1947-10-29 GB GB28887/47A patent/GB636075A/en not_active Expired
-
1950
- 1950-07-22 DE DES17842A patent/DE843235C/en not_active Expired
Cited By (4)
| 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 |
|---|---|
| DK70328C (en) | 1949-12-12 |
| FR939401A (en) | 1948-11-15 |
| DE843235C (en) | 1952-07-07 |
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