CN104733863A - Cross-well electromagnetism logging instrument emitter and emitting antenna thereof - Google Patents
Cross-well electromagnetism logging instrument emitter and emitting antenna thereof Download PDFInfo
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- CN104733863A CN104733863A CN201510069239.9A CN201510069239A CN104733863A CN 104733863 A CN104733863 A CN 104733863A CN 201510069239 A CN201510069239 A CN 201510069239A CN 104733863 A CN104733863 A CN 104733863A
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Abstract
The invention provides a cross-well electromagnetism logging instrument emitter which is strong in stability, high in emitting efficiency and strong in quality factor of an emitting antenna and the emitting antenna thereof. The emitting antenna comprises an antenna assembly arranged in a fiberglass shell of the emitter, and the antenna assembly comprises a magnetic core, a mandrel arranged inside the magnetic core in a penetrated mode, an antenna framework which covers outside the magnetic core and an emitting coil and an alignment coil which are winded on the antenna framework in a sectional mode; the magnetic core is fastened in the antenna framework through a magnetic core upper fixing sleeve and a magnetic core lower fixing sleeve which are arranged at the two ends of the magnetic core; the emitting coil and the alignment coil are both winded on the antenna framework through multiple strands of silvering paint lapping monolayers in a symmetric mode. The emitter comprises the fiberglass shell, the emitting antenna of any scheme which is arranged inside the fiberglass shell and an upper sealing body and a lower sealing body which are arranged at the two ends of the fiberglass shell; a pretension device is arranged between the lower sealing body and the emitting antenna, and a balance system is arranged at the free end of the lower sealing body.
Description
Technical field
The present invention relates to oil-gas exploration technology, be specially electromagnetic tool reflector and transmitting antenna thereof between a kind of well.
Background technology
Along with the development of exploration engineering, determine that stratum sand body is connective, find omission oil reservoir, monitor macroscopical Flooding Efficiency, design infill well, improve the major tasks that reservoir modeling precision has become mid-late oilfield development, but due to electromagnetic logging instrument poor reliability between the well that adopts in existing logging method, antenna power loss is large, radial investigative range is little, work progress is numerous and diverse, has not been well positioned to meet the user demand in above-mentioned application.
Between well electromagnetic logging be to pit shaft between resistivity distribution measure, be contemporary geophysics application technology development important front edge.As shown in Figure 1, between well, electromagnetic tool underground part is primarily of reflector and receiver two parts composition, during measurement, low frequency transmitter is placed in silo, flatly or the vertical and horizontal component in the reception borehole measurement magnetic field of many mouthfuls of vicinities, directly measure the electrology characteristic of well formation with higher precision and resolution.Compared with traditional electrical log, between well, magnetography has darker and larger investigative range; Compared with mt and well-ground electromagnetic method, it has higher precision and darker investigative range.As shown in Figure 2, between well, electromagnetic tool reflector is made up of upper seal 1, transmitting antenna 2, glass fibre reinforced plastics casing 3, pre-tightening apparatus 4, lower seal 5 and balance sysmte 6 one-tenth, and transmitting antenna 2 is key points of reflector.
Summary of the invention
For problems of the prior art, the invention provides a kind of stability strong, emission efficiency is high, electromagnetic tool reflector and transmitting antenna thereof between the well that transmitting antenna quality factor are strong.
The present invention is achieved through the following technical solutions:
Between a kind of well of the present invention, the transmitting antenna of electromagnetic tool reflector, comprises the antenna module be arranged in reflector glass fibre reinforced plastics casing; Described antenna module comprises magnetic core, runs through the mandrel being arranged on magnetic core inside, the coated antenna frame being arranged on magnetic core outside, and is wound on transmitting coil on antenna frame and correcting coil in segmented; On the magnetic core arranged respectively by two ends of magnetic core, under fixed cover and magnetic core, fixed cover is locked in antenna frame; Transmitting coil and correcting coil are wound on antenna frame by multiply silver-plated enamelled wire individual layer symmetry.
Preferably, antenna frame adopts fiberglass to make, and in cylindric, axial centre arranges square through-hole; Columned outer wall is provided with two groups of corresponding with transmitting coil and correcting coil respectively winding slots, in square through-hole, magnetic core is set.
Further, antenna frame outer cover is provided with the righting cushion cover for making antenna module placed in the middle in glass fibre reinforced plastics casing, and the fiberglass that righting cushion cover adopts end face to be etched with sealing ring mounting groove is made.
Further, magnetic core adopts silicon steel sheet stack addition to return font structure.
Preferably, mandrel adopts outside to be wound with making without magnetic metal material of frp layer.
Further, mandrel adopts the outside beryllium-bronze being wound with center drilling to make.
Preferably, transmitting coil and correcting coil are coated with transmitting coil screen and correcting coil screen outward respectively.
Further, transmitting coil screen and correcting coil screen all adopt double-faced flexible PCB to make.
Preferably, on magnetic core, under fixed cover and magnetic core, fixed cover is made by fiberglass.
Electromagnetic tool reflector between a kind of well of the present invention, comprises glass fibre reinforced plastics casing, is arranged on glass fibre reinforced plastics casing inner as above transmitting antenna described in scheme arbitrarily, and is arranged on upper seal and the lower seal at glass fibre reinforced plastics casing two ends; Be provided with pre-tightening apparatus between lower seal and transmitting antenna, the free end of lower seal arranges balance sysmte.
Compared with prior art, the present invention has following useful technique effect:
The present invention by arranging the transmitting coil and correcting coil that adopt the silver-plated enamelled wire of multiply in transmitting antenna, and use the mode of individual layer coiling thus add repeatability and the stability of transmitting antenna, segmented symmetrical structure can effectively reduce transmitting coil distributed capacitance, and the winding method of stranded conductor can effectively improve transmitting antenna quality factor.
Further, the antenna frame made by fiberglass ensures that it is without magnetic characteristic, inside is square hole, for fixed magnetic core, winding slot is carved with outside antenna frame, for specification transmitting coil direction of winding and position, the width of winding slot can be determined according to winding diameter, and winding diameter is determined by electric current by the maximum of transmitting antenna.
Further, by the righting cushion cover of glass reinforced plastic support thus the position of fixed transmission coil in glass fibre reinforced plastics casing, remain center condition; And provide sealing installation site by arranging end face seal groove.
Further, magnetic core adopts the silicon steel material of high permeability to be formed by stacking, and external form is hollow structure, increases guidance quality and the conduction of the magnetic line of force.Adopt high-silicon steel band to superpose the magnetic core made, effectively increase magnetic flux cross section and amass, increase the magnetic flux of transmitting coil, improve the transmitting magnetic moment of transmitting coil; The magnetic gap structure of high-silicon steel band, effectively improves transmitting coil magnetic saturation parameter, has greatly reduced magnetic core and to have generated heat the loss of the transmitting coil power caused.
Further, mandrel is made by without magnetic metal material, can ensure its good transmission to signal; Utilize the frp layer of outside coiling, fully isolation magnetic core and mandrel, avoid the Multi-contact that antenna causes because of deformation, effectively evaded magnetic core and the improper contact problems of mandrel, and then effectively improve the electromagnetic shielding action that line crossed by instrument.
Further, adopting the beryllium-bronze mandrel of outside coiling frp layer, effectively increasing on the basis of mechanical strength, substantially enhancing the electromagnetic signal shield effectiveness that line crossed by signal instrument, effectively improve the signal to noise ratio of signal.
Further, the upper and lower fixed cover of magnetic core adopting fiberglass to make can make magnetic core reliably be locked in antenna frame.
Further, good effectiveness can be played by the setting of screen, after especially adopting double-faced flexible PCB, solve the electromagnetic scattering problems of transmitting coil, reduce the electromagnetic scattering effect of transmitting coil, enhance the emission efficiency of transmitting coil.
Accompanying drawing explanation
Fig. 1 is the logging operation schematic diagram of electromagnetic logging between well in prior art.
Fig. 2 is electromagnetic tool emitter structures schematic diagram between well described in the present invention.
Fig. 3 is the sending antenna structure schematic diagram of electromagnetic tool reflector between well described in the present invention.
Fig. 4 be in Fig. 3 A-A to cutaway view.
In figure: fixed cover 16 under fixed cover 7, antenna frame 8, magnetic core 9, righting cushion cover 10, mandrel 11, transmitting coil 12, transmitting coil screen, correcting coil 14, correcting coil screen 15, magnetic core on upper seal 1, transmitting antenna 2, glass fibre reinforced plastics casing 3, pre-tightening apparatus 4, lower seal 5, balance sysmte 6, magnetic core.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
Electromagnetic tool reflector between well of the present invention, as shown in Figure 2, comprises seal 1, transmitting antenna 2, glass fibre reinforced plastics casing 3, pre-tightening apparatus 4, lower seal 5 and balance sysmte; Wherein, upper seal 1 and the equilibrium oil of lower seal 5 for sealing system oil pocket inside; transmitting antenna 2 is core components of electromagnetic tool reflector between well; for the coiling of transmitting coil; glass fibre reinforced plastics casing 3 is for the protection of transmitting antenna 2; ensure that transmitting antenna and external environment condition are isolated; a seal chamber is jointly formed with upper seal 1, lower seal 5 and balance sysmte; the primary magnetic core 9 for locking in transmitting antenna 2 of pre-tightening apparatus 4, guarantees that magnetic core 9 can not rock back and forth in the axis of transmitting antenna 2.
In this example, transmitting antenna 2 comprises the antenna module be arranged in reflector glass fibre reinforced plastics casing 3; As shown in Figure 3 and Figure 4, antenna module to comprise on mandrel 11, magnetic core 9, antenna frame 8, transmitting coil 12, correcting coil 14, transmitting coil screen 13, correcting coil screen 15, righting cushion cover 10, magnetic core fixed cover 16 under fixed cover 7 and magnetic core.
As shown in Figure 4, antenna frame 8 is middle is square through hole, outside is cylindrical structural, and square through hole places the magnetic core 9 of hollow, and magnetic core 9 is locked by the upper and lower fixed cover of magnetic core, is connected with mandrel 11 in the middle of magnetic core 9; Antenna frame 8 Outer cylindrical is carved with two groups of winding slots, is wound around transmitting coil 12 and correcting coil 14 respectively, draws from the axial cell body that antenna frame 8 wall is arranged after coiling completes; Coil covers a screen outward respectively; Righting cushion cover 10 is equipped with at antenna frame about 8 two ends respectively, and the high strength glass Steel material that righting cushion cover 10 is carved with sealing ring mounting groove by outside is made, for the position of transmitting coil 12 in glass fibre reinforced plastics casing 3 placed in the middle.
Wherein, mandrel 11 is wound with making without magnetic metal material of frp layer by skin, and in this preferred embodiment, the beryllium-bronze that mandrel 11 adopts outside to be wound with center drilling is made; Abundant isolation magnetic core 9 and mandrel 11, avoid the Multi-contact that antenna causes because of deformation, and then effectively improve the electromagnetic shielding action that line crossed by instrument.Magnetic core 9 is formed by stacking by the silicon steel material of high permeability, and external form is hollow structure, increases guidance quality and the conduction of the magnetic line of force.
Wherein, as shown in Figure 3, transmitting coil 12 and correcting coil 14 all adopt the silver-plated enamelled wire coiling of multiply, and adopt the symmetrical winding mode of segmented; Transmitting coil screen 13 and correcting coil screen 15 are made up of double-faced flexible PCB.The upper and lower fixed cover of magnetic core is made up of high strength glass Steel material, and magnetic core 9 is reliably locked in antenna frame 8.
Claims (10)
1. the transmitting antenna of electromagnetic tool reflector between well, is characterized in that, comprise the antenna module be arranged in reflector glass fibre reinforced plastics casing (3); Described antenna module comprises magnetic core (9), run through and be arranged on the inner mandrel (11) of magnetic core (9), coatedly be arranged on the outside antenna frame (8) of magnetic core (9), and the transmitting coil (12) be wound in segmented on antenna frame (8) and correcting coil (14); On the magnetic core arranged respectively by two ends of magnetic core (9), under fixed cover (7) and magnetic core, fixed cover (16) is locked in antenna frame (8); Transmitting coil (12) and correcting coil (14) are wound on antenna frame (8) by multiply silver-plated enamelled wire individual layer symmetry.
2. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1, is characterized in that, antenna frame (8) adopts fiberglass to make, and in cylindric, axial centre arranges square through-hole; Columned outer wall is provided with two groups of corresponding with transmitting coil (12) and correcting coil (14) respectively winding slots, magnetic core (9) is set in square through-hole.
3. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1 and 2, it is characterized in that, antenna frame (8) outer cover is provided with the righting cushion cover (10) for making antenna module placed in the middle in glass fibre reinforced plastics casing (3), and the fiberglass that righting cushion cover (10) adopts end face to be etched with sealing ring mounting groove is made.
4. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1 and 2, is characterized in that, magnetic core (9) adopts silicon steel sheet stack addition to return font structure.
5. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1, is characterized in that, mandrel (11) adopts and is outsidely wound with making without magnetic metal material of frp layer.
6. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1 or 5, it is characterized in that, mandrel (11) adopts the outside beryllium-bronze being wound with center drilling to make.
7. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1, it is characterized in that, transmitting coil (12) and correcting coil (14) are coated with transmitting coil screen (13) and correcting coil screen (15) outward respectively.
8. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 6, it is characterized in that, transmitting coil screen (13) and correcting coil screen (15) all adopt double-faced flexible PCB to make.
9. the transmitting antenna of electromagnetic tool reflector between a kind of well according to claim 1, is characterized in that, on magnetic core, under fixed cover (7) and magnetic core, fixed cover (16) is made by fiberglass.
10. electromagnetic tool reflector between a well, it is characterized in that, comprise glass fibre reinforced plastics casing (3), be arranged on the inner transmitting antenna (2) as described in claim 1-9 any one of glass fibre reinforced plastics casing (3), and be arranged on upper seal (1) and the lower seal (5) at glass fibre reinforced plastics casing (3) two ends; Be provided with pre-tightening apparatus (4) between lower seal (5) and transmitting antenna (2), the free end of lower seal (5) arranges balance sysmte (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510069239.9A CN104733863B (en) | 2015-02-09 | 2015-02-09 | Electromagnetic tool transmitter and its transmitting antenna between a kind of well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510069239.9A CN104733863B (en) | 2015-02-09 | 2015-02-09 | Electromagnetic tool transmitter and its transmitting antenna between a kind of well |
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| Publication Number | Publication Date |
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| CN104733863A true CN104733863A (en) | 2015-06-24 |
| CN104733863B CN104733863B (en) | 2017-12-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039765A (en) * | 2016-02-04 | 2017-08-11 | 中石化石油工程技术服务有限公司 | Electromagnetic Launching antenna between a kind of well |
| CN107123850A (en) * | 2016-02-24 | 2017-09-01 | 北京精密机电控制设备研究所 | A kind of reception antenna and manufacture method for underground intelligent switch instrument |
| CN110265784A (en) * | 2018-03-12 | 2019-09-20 | 中国石油化工股份有限公司 | With the antenna equipment for boring instrument |
| CN110761782A (en) * | 2019-11-13 | 2020-02-07 | 中国石油天然气集团有限公司 | Azimuth while-drilling nuclear magnetic resonance logging device and method for geological guidance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107039765A (en) * | 2016-02-04 | 2017-08-11 | 中石化石油工程技术服务有限公司 | Electromagnetic Launching antenna between a kind of well |
| CN107123850A (en) * | 2016-02-24 | 2017-09-01 | 北京精密机电控制设备研究所 | A kind of reception antenna and manufacture method for underground intelligent switch instrument |
| CN107123850B (en) * | 2016-02-24 | 2019-06-18 | 北京精密机电控制设备研究所 | A kind of receiving antenna and manufacturing method for underground intelligent switch tool |
| CN110265784A (en) * | 2018-03-12 | 2019-09-20 | 中国石油化工股份有限公司 | With the antenna equipment for boring instrument |
| CN110761782A (en) * | 2019-11-13 | 2020-02-07 | 中国石油天然气集团有限公司 | Azimuth while-drilling nuclear magnetic resonance logging device and method for geological guidance |
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| CN104733863B (en) | 2017-12-05 |
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