CN201539248U - Electromagnetic logging instrument for oilfield production well - Google Patents
Electromagnetic logging instrument for oilfield production well Download PDFInfo
- Publication number
- CN201539248U CN201539248U CN 200920247085 CN200920247085U CN201539248U CN 201539248 U CN201539248 U CN 201539248U CN 200920247085 CN200920247085 CN 200920247085 CN 200920247085 U CN200920247085 U CN 200920247085U CN 201539248 U CN201539248 U CN 201539248U
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- logging
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- soft magnetism
- well
- logging instrument
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Abstract
The utility model discloses an electromagnetic logging instrument for an oilfield production well, which is applied to the electromagnetic logging construction of the oilfield production well. The electromagnetic logging instrument mainly comprises a cable (1), a magnetizing device (11) and a logging coil system (12). The magnetizing device (11) is positioned at the middle part of the logging instrument, the upper end is provided with the cable (1), and the lower end is provided with the logging coil system (12). The magnetizing device (11) and the logging coil system (12) are connected by a soft magnetic core bar (3). The electromagnetic logging instrument has the effects of realizing magnetizing treatment for a nearby sleeve of a detection area, reducing the magnetic conductivity of the nearby sleeve, reducing the influence of the sleeve on inductive electromagnetic signals, facilitating the inductive electromagnetic signals to pass through the sleeve and realizing detection of external medium properties of the sleeve by arranging the magnetizing device at the front part of the logging coil system.
Description
Technical field
The utility model relates to the oil reservoir logging technical field, particularly a kind of electromagnetic logging instrument at producing well.
Background technology
The field produces borehole logging tool is as a kind of important logging technique, is mainly used in the dynamic change of monitoring oil reservoir, the research remaining oil distribution, determines all many-sides such as the exhausted index of oil gas, has in the middle and later periods of petroleum resources development process very widely and uses.
At present, production well log mainly is in order to realize that seeing through metal sleeve surveys the outside formation information of producing well.The subject matter of its existence is: the sleeve pipe in the producing well has good electrical conductivity and higher magnetic conductivity.In the well logging process, the high-frequency electromagnetic signal that the electromagnetic logging instrument is launched in sleeve pipe most ofly in communication process is shielded by metal sleeve, fails the effective secondary field of formation in the stratum sleeve pipe outside.So it is relatively more difficult to receive and handle the signal that has the jacket exterior formation information.Still not having mature technique can eliminate the influence of sleeve pipe to electromagnetic signal both at home and abroad, and the existence of metal sleeve has strengthened the difficulty of induction logging, has seriously restricted the application of electromagnetic induction technology in production well log.
The utility model content
The purpose of this utility model is: a kind of field produces well electromagnetic logging instrument is provided, utilize magnetizing assembly earlier sleeve pipe to be magnetized processing, reduce the magnetic conductivity of sleeve pipe, use the detection of electromagnetic logging technology realization to stratum characteristic outside the producing well sleeve pipe on magnetized basis, whole device has efficient, quick, non-contacting characteristics.Overcome the high-frequency electromagnetic signal of existing electromagnetic logging instrument emission, the deficiency that in communication process, is shielded by metal sleeve.
The technical solution adopted in the utility model is: field produces well electromagnetic logging instrument, mainly form by cable, magnetizing assembly and well logging coil array.Magnetizing assembly is positioned at the middle part of logging instrument, and the upper end is a cable, and the lower end is the well logging coil array.Magnetizing assembly is connected by the soft magnetism plug between the coil array with well logging.
Described magnetizing assembly comprises excitation supply, magnetizing coil, magnetic bead, spring leaf and soft magnetism plug.Cable is connected with excitation supply.Excitation supply provides constant direct current for magnetizing coil, produces the required magnetic field energy of sleeve pipe magnetization.The lower end of excitation supply connects the soft magnetism plug.The soft magnetism plug is the cylinder bodily form, on cylindrical top be diameter greater than disk on cylindrical, following disk is arranged at cylindrical middle part, last disk and following disk are that the cylinder bodily form and center line are same straight line.Be wound with magnetizing coil on the soft magnetism plug between last disk and the following disk.Be fixed with spring leaf on the sidewall of last disk and following disk, the other end of spring leaf is fixed with magnetic bead.Magnetic bead becomes circumferential arrangement.Magnetic bead can contact with the inwall of sleeve pipe, makes the soft magnetism plug can remain on the center of sleeve pipe.Be connected with the well logging coil array in the lower end of soft magnetism plug.
Described well logging coil array comprises transmitting coil, receiving coil and ceramic sleeve, is enclosed with ceramic sleeve on the outer wall of the lower end of soft magnetism plug, is fixed with transmitting coil and receiving coil on the outer wall of ceramic sleeve.
Transmitting coil and receiving coil adopt screw thread to be fixed on the outer wall of ceramic sleeve.
Described soft magnetism plug is in the cover tube hub, runs through magnetizing assembly and well logging coil array from top to bottom.
The beneficial effects of the utility model: the utility model field produces well electromagnetic logging instrument, by magnetizing assembly being set in well logging coil array front portion, realized near the magnetization of the sleeve pipe search coverage is handled, reduced near the magnetic conductivity of sleeve pipe, reduced the influence of sleeve pipe to the inductive electromagnetic signal, help electromagnetic induction signal and pass sleeve pipe, realize detection the jacket exterior dielectric property.
Description of drawings
Fig. 1 is the utility model field produces well electromagnetic logging instrument structural profile schematic diagram.The partial structurtes generalized section.
Fig. 2 is the utility model field produces well electromagnetic logging instrument structural profile schematic diagram.The structural representation of magnetizing assembly among the embodiment.
Among the figure: 1, cable; 2, excitation supply; 3, soft magnetism plug; 4, sleeve pipe; 5, spring leaf; 6, magnetic bead; 7, magnetizing coil; 8, transmitting coil; 9 receiving coils; 10, ceramic sleeve; 11, magnetizing assembly; 12, well logging coil array; 13 times disks; Disk on 14.
The specific embodiment
Embodiment 1: with a field produces well electromagnetic logging instrument is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model field produces well electromagnetic logging instrument mainly is made up of cable 1, magnetizing assembly 11 and well logging coil array 12.Magnetizing assembly 11 is positioned at the middle part of logging instrument, and the upper end is a cable 1, and the lower end is a well logging coil array 12.Magnetizing assembly 11 is connected by soft magnetism plug 3 between the coil array 12 with well logging.
Well logging coil array 12 comprises transmitting coil 8, receiving coil 9 and ceramic sleeve 10, is enclosed with ceramic sleeve 10 on the outer wall of the lower end of soft magnetism plug 3, adopts screw thread to be fixed with transmitting coil 8 and receiving coil 9 on the outer wall of ceramic sleeve 10.Transmitting coil 8 and receiving coil 9 are prior aries, are not described in detail.
The summary principle:
Consult Fig. 2.Magnetizing assembly 11, comprise excitation supply 2, magnetizing coil 7, spring leaf 5, magnetic bead 6 and soft magnetism plug 3, excitation supply 2 links to each other with magnetizing coil 7, in magnetizing coil 7, inject direct current by excitation supply 2, in producing well, produce stabilizing magnetic field, regulate magnetic bead 6 by spring leaf 5 and contact, constitute closed magnetic loop, utilize the conducting of the magnetic line of force in magnetic circuit to realize near the magnetization of the sleeve pipe search coverage 4 is handled together with soft magnetism plug 3 with the sleeve pipe 4 of producing well.
Need to prove, the difference part of employed apparatus subject and existing electromagnetic logging instrument mainly is to have increased sleeve pipe magnetizing assembly 11 among this embodiment, magnetizing assembly 11 is positioned at well logging coil array front end, earlier sleeve pipe is magnetized processing, utilization well logging coil array 12 is finished the detection to sleeve pipe 4 outer stratum again, in addition other parts and existing technical measures are basic identical, in the present embodiment no longer explanation.
Claims (5)
1. field produces well electromagnetic logging instrument, mainly form by cable (1), magnetizing assembly (11) and well logging coil array (12), feature is: magnetizing assembly (11) is positioned at the middle part of logging instrument, the upper end is cable (1), the lower end is a well logging coil array (12), and magnetizing assembly (11) is connected by soft magnetism plug (3) between the coil array (12) with logging well.
2. field produces well electromagnetic logging instrument according to claim 1, it is characterized in that: described magnetizing assembly (11) comprises excitation supply (2), magnetizing coil (7), magnetic bead (6), spring leaf (5) and soft magnetism plug (3), cable (1) is connected with excitation supply (2), the lower end of excitation supply (2) connects soft magnetism plug (3), soft magnetism plug (3) is the cylinder bodily form, on cylindrical top is that diameter is greater than disk on cylindrical (14), following disk (13) is arranged at cylindrical middle part, last disk (14) and following disk (13) are that the cylinder bodily form and center line are same straight line, be wound with magnetizing coil (7) on the soft magnetism plug (3) between last disk (14) and the following disk (13), on the sidewall of last disk (14) and following disk (13), be fixed with spring leaf (5), the other end of spring leaf (5) is fixed with magnetic bead (6), magnetic bead (6) becomes circumferential arrangement, is connected with well logging coil array (12) in the lower end of soft magnetism plug (3).
3. field produces well electromagnetic logging instrument according to claim 1, it is characterized in that: described well logging coil array (12) comprises transmitting coil (8), receiving coil (9) and ceramic sleeve (10), is enclosed with ceramic sleeve (10) and is fixed with transmitting coil (8) and receiving coil (9) on the lower end outer wall of soft magnetism plug (3) on the outer wall of ceramic sleeve (10).
4. field produces well electromagnetic logging instrument according to claim 3 is characterized in that: transmitting coil (8) and receiving coil (9) adopt screw thread to be fixed on the outer wall of ceramic sleeve (10).
5. according to claim 1,2,3 or 4 described field produces well electromagnetic logging instrument, it is characterized in that: described soft magnetism plug (3) is in sleeve pipe (15) center, runs through magnetizing assembly (11) and well logging coil array (12) from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920247085 CN201539248U (en) | 2009-11-17 | 2009-11-17 | Electromagnetic logging instrument for oilfield production well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920247085 CN201539248U (en) | 2009-11-17 | 2009-11-17 | Electromagnetic logging instrument for oilfield production well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201539248U true CN201539248U (en) | 2010-08-04 |
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ID=42590702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920247085 Expired - Lifetime CN201539248U (en) | 2009-11-17 | 2009-11-17 | Electromagnetic logging instrument for oilfield production well |
Country Status (1)
| Country | Link |
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| CN (1) | CN201539248U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400670A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Design method for three-dimensional induction logging instrument coil system |
| CN103352690A (en) * | 2013-06-25 | 2013-10-16 | 天津大学 | Transient electromagnetic logging transmitting probe |
| CN103867183A (en) * | 2012-12-18 | 2014-06-18 | 中国石油化工股份有限公司 | Transient electromagnetic method through casing water exploration tester |
| CN108594313A (en) * | 2018-06-05 | 2018-09-28 | 中煤科工集团西安研究院有限公司 | Hand propelled time domain electromagnetic well logging apparatus and method in a kind of coal mine down-hole drilling |
-
2009
- 2009-11-17 CN CN 200920247085 patent/CN201539248U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400670A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Design method for three-dimensional induction logging instrument coil system |
| CN103867183A (en) * | 2012-12-18 | 2014-06-18 | 中国石油化工股份有限公司 | Transient electromagnetic method through casing water exploration tester |
| CN103352690A (en) * | 2013-06-25 | 2013-10-16 | 天津大学 | Transient electromagnetic logging transmitting probe |
| CN103352690B (en) * | 2013-06-25 | 2016-04-06 | 天津大学 | A kind of transient electromagnetic well logging transmitting probe |
| CN108594313A (en) * | 2018-06-05 | 2018-09-28 | 中煤科工集团西安研究院有限公司 | Hand propelled time domain electromagnetic well logging apparatus and method in a kind of coal mine down-hole drilling |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100804 |