CN203594440U - Coil structure of three-component induction logging tool - Google Patents
Coil structure of three-component induction logging tool Download PDFInfo
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- CN203594440U CN203594440U CN201320384147.6U CN201320384147U CN203594440U CN 203594440 U CN203594440 U CN 203594440U CN 201320384147 U CN201320384147 U CN 201320384147U CN 203594440 U CN203594440 U CN 203594440U
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Abstract
The utility model provides a coil structure of a three-component induction logging tool, which comprises a co-located receiver coil and a transmitter coil, wherein the receiver coil comprises an axial (Z direction) coil winding respectively along a notch groove on the skeleton of the receiver coil and two group coplanar coils; the two group coplanar coils is wound respectively on two end surfaces of a receiver coil skeleton; each group of coplanar coils comprises an X direction coil, a Y direction coil; the three-component coils, the Z direction coil, the X direction coil and the Y direction coil, is co-located orthogonally; and the receiver coil skeleton is of integrated structure, in order to make the coil structure offset direct coupling signals more accurately.
Description
Technical field
The utility model relates to induction logging field, more particularly, relates to a kind of loop construction for three-component induction log tool.
Background technology
In induction logging field, traditional induction log tool is only asked moisture/oil saturation by measuring acline resistivity.According to one's analysis, about 30% oil reservoir is stored in low-resistivity in the world, in low-contrast laminar shale sandstone formation, this stratum extensively exists in the turbid lamination in deep-sea and shale, this type of stratum has macroscopical electrical anisotropy, horizontal resistivity mainly reflects low-resistance mud stone, be usually expressed as low-resistance, vertical resistivity mainly reflects high resistant sandstone, be usually expressed as high resistant, conventional induction logging instrument only utilizes horizontal resistivity evaluation to tend to Lou estimate stratum oil content, therefore can survey the horizontal resistivity on stratum simultaneously, many components induction instrument aratus of vertical conductivity and stratigraphic dip has been subject to great attention.In multiple-component induction logging technical development process, external 3DEX is that Atlas company releases for 2000, and instrument adopts three orthogonal axial separation dispatch coil structures, and tool length is long; Schlumberger company releases RtScanner for 2005, and its three quadrature coil is bit architecture altogether, compact conformation, but have no its concrete structure of coil system.
In prior art, taked to realize X/Y to coil array by flexible PCB plate printed circuit, this kind is designed with two weak points, and the one, be difficult to make X/Y to reach the best straight couple debugging effect that disappears to coil simultaneously, the 2nd, it is larger that temperature is floated effect.In addition, it is generally acknowledged downhole logging instruments limited space, adopt spiral tube structure to design three quadrature coil systems and will be limited to limited space, be difficult to guarantee enough large magnetic torque, thereby can not effectively detect faint formation induction signal.
In addition, existing loop construction cannot regulate the directly coupling signal of cross-product, according to actual circuit measuring result, if do not regulate cross-product XY, XZ, YX, YZ, ZX, ZY, probably make in air measuring-signal saturated, cannot be applied to down-hole surveys, therefore design a kind of coil array of cross-product directly coupling signal that can regulate very important, measuring-signal can be solved on the one hand saturated, can increase on the other hand can measuring-signal dynamic range, there is effect very significantly for practical application.
Utility model content
In order to solve above-described technological deficiency, the utility model provides a kind of loop construction of three-component induction log tool, and receiving coil skeleton is one-body molded, has the stable feature that mechanical strength is high, offsets to make more accurately loop construction carry out directly coupling signal.
For achieving the above object, the utility model is taked following technical scheme:
A loop construction for three-component induction log tool, comprises receiving coil and the transmitting coil of common, wherein:
Receiving coil comprises axial (Z-direction) coil and the two groups of coplanar coils along the cutting coiling on receiving coil skeleton separately, two groups of coplanar coils are wound on respectively on two end faces of receiving coil skeleton, every group of coplanar coil comprises that X is to coil and Y-direction coil, position is orthogonal altogether to coil, three component coils of Y-direction coil for Z-direction coil, X, and receiving coil skeleton is integrated formed structure.
Preferably, receiving coil skeleton adopts polyethers ether copper product or Machining of Ceramics to form, and winds the line as cotton-covered wire or enamel-covered wire.
Preferably, the cutting on receiving coil skeleton adopts annular cutting or linear pattern cutting.
Preferably, the structure of transmitting coil is identical with the structure of receiving coil.
The utility model is owing to taking above-described technical scheme, and it comprises following advantage:
Can in the space of limitation, make receiving coil magnetic moment can reach designing requirement, can well detect faint formation induction signal; Can conveniently carry out the independently straight symplectic debugging that disappears to the coil array of tri-directions of X/Y/Z, reduced debugging difficulty, and this design can be reduced to minimum by directly coupling signal effectively; It is less that this design temperature is floated effect; This structure also makes instrument compacter, and symmetrical winding method can effectively suppress common mode disturbances, improves instrument signal to noise ratio.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and exemplary embodiment of the present utility model and explanation thereof are used for explaining the utility model, do not form restriction of the present utility model; In the accompanying drawings:
Fig. 1 is the receiving coil assembling schematic diagram in the utility model loop construction embodiment;
Fig. 2 is that the X/Y of the receiving coil that provides of the utility model embodiment is to coil section coiling schematic diagram;
Fig. 3, Fig. 4 are that the compensation of the utility model embodiment receives the straight symplectic line schematic diagram disappearing.
The specific embodiment
In order to make the technical solution of the utility model clearer, below in conjunction with the drawings and specific embodiments, the utility model is elaborated further.It should be noted that, in the situation that not conflicting, the variety of way in embodiment and embodiment in the application can combine mutually.
For convenience, first the utility model term used is defined as follows.
Quadrature coil system: the quadrature component group of point three directions of x, y, z; Each group component comprises again two coils: main receiving coil and compensation receiving coil; Therefore total 3*2=6 coil.
Directly coupling signal offsets: due to receiving in signal, directly much larger than formation signal from the signal of transmitting coil coupling, often want large one more than the order of magnitude, and therefore need to be eliminated according to the direct-coupled feature of directly coupling signal.
The utility model designs a kind of coil array of three-component induction log tool, requires receiving coil, transmitting coil to adopt position design altogether, ease of assembly debugging and the straight symplectic operation that disappears.Altogether position design and three-component is orthogonal that stratum horizontal resistivity and vertical resistivity information can be provided, circuit realize and signal intractability easy compared with tilt coil, and can effectively shorten tool length, effectively reduce instrument and in well, be hampered and meet card probability.
Receiving coil assembling schematic diagram in Fig. 1 the utility model loop construction embodiment, transmitting coil is identical with the structure of receiving coil.Receiving coil comprises axial (Z-direction) coil and the two groups of coplanar coils along the cutting coiling on receiving coil skeleton separately, two groups of coplanar coils are wound on respectively on two end faces of receiving coil skeleton, every group of coplanar coil comprises that X is to coil and Y-direction coil, wherein position is orthogonal altogether to coil, three component coils of Y-direction coil for Z-direction coil, X, receiving coil skeleton is integrated formed structure, has the stable feature that mechanical strength is high; Three-component coil altogether position is orthogonal, has greatly shortened tool length, can effectively reduce instrument down-hole and be hampered, meets the generation of card situation; Transverse coil can be many around the number of turn, and receiving area is large, can guarantee to receive small-signal, and laterally (X, Y) coil can be by regulating the coiling distribution on cylinder to realize more neatly fine tuning and fine tuning simultaneously.
In the application's a embodiment, receiving coil skeleton can adopt polyethers ether copper product or Machining of Ceramics to form, and coiling adopts cotton-covered wire or enamel-covered wire.The main difference of cotton-covered wire and enamel-covered wire is: cotton-covered wire is multiply fine rule, can reduce the impact of Kelvin effect under high frequency, effectively increase current delivery area, and enamel-covered wire more can effectively utilize current delivery cross-sectional area aspect physical dimension.
In the application's a embodiment, the cutting on receiving coil skeleton adopts annular cutting or linear pattern cutting.
According to Theory of Electromagnetic Field and induction logging secondary field theory, in transmitting coil directly coupling signal, do not comprise formation information, and secondary field information just comprises real formation resistivity information, for directly coupling signal, stratum secondary field weak output signal, thereby need to amplify secondary field signal, saturated for avoiding amplifying, need as far as possible regulating winding variable to carry out directly coupling signal and offset.For ZZ, XX, YY component, regulating measure is more, multiple structure of coil system all can adopt distance directly to regulate, and the application adopts distance to think that in conjunction with positive negative side in the plus-minus number of turn and different distance groove coiling realizes magnetic flux fine adjustment, and then realizes accurately offseting of directly coupling signal.
Further consider the AXIALLY SYMMETRIC PROBLEMS of instrument, ZZ direction need meet assurance central plane symmetry, and XX, YY direction need guarantee that end face is symmetrical, need to take the method for two-wire coiling when coiling.For example, ZZ direction adjust time, can add and subtract the number of turn and complete coarse adjustment, then by different slots oppositely around the home coil carry out fine tuning.
Fig. 2 is that the X/Y of receiving coil is to coil section coiling schematic diagram, show the cabling order of coil array coiling, when enforcement, each group measuring coil is divided into a main receiving coil and a bucking coil of answering in contrast, as shown in Figure 3 and Figure 4, main reception receives the main positive and negative winding form that adopts with compensation, to realize straight symplectic disappearing, thereby extract better formation signal, each main reception needs two coils of positive and negative winding, compensation receives also needs two coils of positive and negative winding, and Opposite direction connection between two, ground connection between two bucking coils, in the two ends of two main receiving coils output signal.Therefore,, if introduced common mode disturbances and noise in system, just can realize the reception of high s/n ratio by this connected mode.Thereby guaranteeing, on the straight symplectic basis disappearing, to realize balance reception, eliminate common-mode noise and interference.Particularly, main receiving coil is divided into two parts in left and right, by two enamel-covered wires respectively coiling complete, one end is removed coat of paint and is fixed, one end is removed coat of paint and is connected with compensation receiving coil two ends by the wire with insulating layer, compensation end is slightly different with main receiving terminal coiling, the two enamel-covered wire coilings in left and right of compensation end need to be fixed on same place after completing exactly, for follow-up ground connection is prepared, be equivalent to like this earth point and be selected in hub of a spool, can greatly suppress common mode disturbances, this in the past induction instrument aratus never adopt; Positive and negative winding is because centre-point earth needs two ends, left and right symmetry.
Fig. 2 has shown the concrete winding mode of receiving coil skeleton end face, and end face X is to coil as arrow index line in Fig. 2, and Y-direction coil is similar to another vertical direction with it, represents with square index line.In winding process according to first axial (Z-direction) coil around the home, after around the home laterally the order of (X/Y to) coil carry out.Axially coil is according to evaluation uniform distribution in the cutting in the Z of receiving coil direction, according to symmetric mode around the home; Transverse coil also adopts symmetrical coiling, and symmetrical coiling refers to that main receiving coil two ends and bucking coil two ends all adopt symmetrical coiling, and carries out respective end connection, realizes centre-point earth, can suppress like this common mode disturbances.Because coil rack need be fixed on beryllium zinc-copper plug, so center, upper and lower end face can not cabling, for increasing, the large as far as possible transverse coil of coiling can receive signal magnetic flux, adopt downward cabling and the horizontal cabling winding method of end face on circumferential surface, this winding method has guaranteed to obtain as far as possible greatly formation signal, in the time that directly coupling signal offsets, need to adopt this winding method if carry out relatively large adjusting, meticulous adjusting need to be finely tuned in coil circumferential surface coiling X, Y-direction rectangular surfaces.
The above embodiment is only preferred embodiment of the present utility model; be not intended to limit protection domain of the present utility model, those skilled in the art can deliberately carry out various modifications and variations and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these modifications and modification interior.
Claims (4)
1. a loop construction for three-component induction log tool, comprises receiving coil and the transmitting coil of common, wherein:
Described receiving coil comprises axial coil and the two groups of coplanar coils along the cutting coiling on receiving coil skeleton separately, described two groups of coplanar coils are wound on respectively on two end faces of described receiving coil skeleton, every group of coplanar coil comprises that X is to coil and Y-direction coil, position is orthogonal altogether to coil, three component coils of described Y-direction coil for described axial coil, described X, and described receiving coil skeleton is integrated formed structure.
2. loop construction according to claim 1, wherein,
Described receiving coil skeleton adopts polyethers ether copper product or Machining of Ceramics to form, and winds the line as cotton-covered wire or enamel-covered wire.
3. loop construction according to claim 1 and 2, wherein,
Cutting on described receiving coil skeleton adopts annular cutting or linear pattern cutting.
4. loop construction according to claim 1, wherein,
The structure of described transmitting coil is identical with the structure of described receiving coil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320384147.6U CN203594440U (en) | 2013-06-28 | 2013-06-28 | Coil structure of three-component induction logging tool |
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| CN201320384147.6U CN203594440U (en) | 2013-06-28 | 2013-06-28 | Coil structure of three-component induction logging tool |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105114070A (en) * | 2015-09-23 | 2015-12-02 | 中国石油大学(北京) | Three-dimensional nuclear magnetic resonance logging instrument probe, logging instrument and antenna excitation method |
| CN105114071A (en) * | 2015-09-23 | 2015-12-02 | 中国石油大学(北京) | Nuclear magnetic resonance logging instrument probe with multiple layers of magnets and antenna excitation method |
| CN105201496A (en) * | 2015-09-23 | 2015-12-30 | 中国石油大学(北京) | Nuclear magnetic resonance (NMR) logger probe with double layers of magnets and antenna excitation method |
| CN105221145A (en) * | 2015-09-23 | 2016-01-06 | 中国石油大学(北京) | Multi-faceted NMR (Nuclear Magnetic Resonance) logging instrument and antenna excitation method |
| CN105240000A (en) * | 2015-09-23 | 2016-01-13 | 中国石油大学(北京) | Multi-detection-depth nuclear magnetic resonance logging instrument and probe thereof and antenna excitation method |
| CN105240002A (en) * | 2015-09-23 | 2016-01-13 | 中国石油大学(北京) | Multi-antenna excitation based three-dimensional nuclear magnetic resonance logging instrument |
| CN106158167A (en) * | 2015-04-02 | 2016-11-23 | 新德隆特种陶瓷（大连）有限公司 | Insulator |
| CN107589460A (en) * | 2017-08-28 | 2018-01-16 | 中煤科工集团西安研究院有限公司 | Reception antenna and signal processing method in a kind of three-component TDEM hole |
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2013
- 2013-06-28 CN CN201320384147.6U patent/CN203594440U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106158167A (en) * | 2015-04-02 | 2016-11-23 | 新德隆特种陶瓷（大连）有限公司 | Insulator |
| CN105114071B (en) * | 2015-09-23 | 2018-03-09 | 中国石油大学(北京) | NMR logging instrument probe and antenna excitation method with multi-layer magnet |
| US10151852B2 (en) | 2015-09-23 | 2018-12-11 | China University Of Petroleum-Beijing | Multi-azimuth nuclear magnetic resonance logging instrument and antenna excitation method |
| CN105221145A (en) * | 2015-09-23 | 2016-01-06 | 中国石油大学(北京) | Multi-faceted NMR (Nuclear Magnetic Resonance) logging instrument and antenna excitation method |
| CN105240000A (en) * | 2015-09-23 | 2016-01-13 | 中国石油大学(北京) | Multi-detection-depth nuclear magnetic resonance logging instrument and probe thereof and antenna excitation method |
| CN105240002A (en) * | 2015-09-23 | 2016-01-13 | 中国石油大学(北京) | Multi-antenna excitation based three-dimensional nuclear magnetic resonance logging instrument |
| CN105114071A (en) * | 2015-09-23 | 2015-12-02 | 中国石油大学(北京) | Nuclear magnetic resonance logging instrument probe with multiple layers of magnets and antenna excitation method |
| CN105201496A (en) * | 2015-09-23 | 2015-12-30 | 中国石油大学(北京) | Nuclear magnetic resonance (NMR) logger probe with double layers of magnets and antenna excitation method |
| CN105240000B (en) * | 2015-09-23 | 2018-04-17 | 中国石油大学(北京) | The NMR logging instrument and its probe of more investigation depths, antenna excitation method |
| US10274633B2 (en) | 2015-09-23 | 2019-04-30 | China University Of Petroleum-Beijing | Three dimensional nuclear magnetic resonance logging instrument based on multiple antenna excitation |
| US10151808B2 (en) | 2015-09-23 | 2018-12-11 | China University Of Petroleum-Beijing | Multi-detecting depth nuclear magnetic resonance logging tool and probe, and antenna excitation method |
| CN105114070A (en) * | 2015-09-23 | 2015-12-02 | 中国石油大学(北京) | Three-dimensional nuclear magnetic resonance logging instrument probe, logging instrument and antenna excitation method |
| US10191178B2 (en) | 2015-09-23 | 2019-01-29 | China University Of Petroleum-Beijing | Three-dimensional nuclear magnetic resonance logging instrument probe, logging instrument and antenna excitation method |
| US10254434B2 (en) | 2015-09-23 | 2019-04-09 | China University Of Petroleum-Beijing | Nuclear magnetic resonance logging instrument probe with multi-layered magnet and antenna excitation method |
| US10274634B2 (en) | 2015-09-23 | 2019-04-30 | China University Of Petroleum-Beijing | Nuclear magnetic resonance logging instrument probe with double-layered magnets and antenna excitation method |
| CN107589460A (en) * | 2017-08-28 | 2018-01-16 | 中煤科工集团西安研究院有限公司 | Reception antenna and signal processing method in a kind of three-component TDEM hole |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CHINA OILFIELD SERVICES Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CHINA OILFIELD SERVICES Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 |
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| CF01 | Termination of patent right due to non-payment of annual fee |