CN108612523A - A kind of bi-directional electromagnetic measurement while drilling control method and system based on aerial array - Google Patents
A kind of bi-directional electromagnetic measurement while drilling control method and system based on aerial array Download PDFInfo
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- CN108612523A CN108612523A CN201810469383.5A CN201810469383A CN108612523A CN 108612523 A CN108612523 A CN 108612523A CN 201810469383 A CN201810469383 A CN 201810469383A CN 108612523 A CN108612523 A CN 108612523A
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- 238000005553 drilling Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005259 measurement Methods 0.000 title claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 210000002445 nipple Anatomy 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 31
- 238000012545 processing Methods 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 19
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- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
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- 238000012935 Averaging Methods 0.000 description 1
- 230000018199 S phase Effects 0.000 description 1
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Classifications
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention provides a kind of bi-directional electromagnetic measurement while drilling control method and system based on aerial array, the control method that measures passes through the aerial array that is formed by the n group grounding electrode framves centered on drilling rod, ground signal sending and receiving apparatus with phase detector, computer, one end is connected the n root copper conductors that the other end is connected one by one with n grounding electrode with drilling rod, underground signal sending and receiving apparatus and underground survey power supply pipe nipple are realized, during uploading in signal and pass down, pass through aerial array and phase detector, eliminate the phase difference between interfering with each other between each grounding electrode reception signal and multigroup aerial signal that underground signal reception device is received in ground-plane antenna battle array.The present invention improves the emissive porwer and receiving sensitivity of signal, and then effectively improve bi-directional electromagnetic wave measurement while drilling signal transmission distance by using aerial array in electromagnetic measurement while drilling system.
Description
Technical field
The present invention relates to electromagnetic measurement while drilling field more particularly to a kind of bi-directional electromagnetic measurement while drillings based on aerial array
Control method and system.
Background technology
Electromagnetic measurement while drilling (EM-MWD) is a new technology for entering industrial applications the 1980s, is situated between by mud
Matter influence is small, can be not only used for mud drilling, and can be used for foam, air drilling.It is surveyed with brill relative to unidirectional electromagnetism
The signal transmission power and frequency of downhole instrument is adjusted in amount, bi-directional electromagnetic measurement-while-drilling system, and enhancing instrument is to complicated resistance
The adaptability on rate stratum；Can also according to underground working and measurement demand, control underground transmitting module whether suspend mode, to save electricity
Can, extend the instrument underground work time.In two-way EM-MWD systems, up-delivering signal is in shaft bottom by drill string by insulating short section
Two sections are divided into, emits the two poles of the earth respectively as signal, constitutes asymmetric dipole energisation mode, the acquisition of ground signal reception device is bored
Potential difference between column and grounding electrode and the signal through handling the upload of acquisition underground.Lower communication number is by drill string and ground connection
Apply driving source transmitting between emission electrode, underground signal receiving terminal acquires the potential difference of insulating short section both ends drill string and through processing
Obtain the director data that subsurface passes.And during practical logging, signal decaying is tight when being transmitted in the earth formation due to electromagnetic wave
Weight, when reaching certain depth, will be difficult to detect effective electromagnetic wave signal on ground or underground.To find out its cause, mainly
Since ground launch and reception device usually only constitute a transmitting or reception antenna, signal by drill string and a grounding electrode
Emissive porwer and receiving sensitivity are far away from antenna array.And antenna array signal emit receive process in, due to spatial position
The anisotropism on Non-completety symmetry and stratum, mutiple antennas transmitting or received signal can form certain phase difference, make
At interfering with each other for signal, it is unfavorable for the bi-directional electromagnetic wave measurement while drilling operation in compared with deep well borehole.
Invention content
The present invention is inadequate for the reception of existing electromagnetic measurement while drilling technology and transmitting signal strength, and transmission range is inadequate
Far, excessive disadvantage is interfered between signal, it is proposed that a kind of bi-directional electromagnetic measurement while drilling control method based on aerial array and
System, it is described to measure aerial array that control method formed by the n group grounding electrode framves centered on drilling rod, with phase detection
The ground signal sending and receiving apparatus of device, computer, one end are connected the n that the other end is connected one by one with n grounding electrode with drilling rod
Root copper conductor, underground signal sending and receiving apparatus and underground survey power supply pipe nipple realize that measurement method includes the following steps：
S1, underground survey power supply pipe nipple measure underground geologic parameter, drilling parameter and bore parameters and by the underground
Matter parameter, drilling parameter and bore parameters are transmitted to underground signal sending and receiving apparatus；
S2, underground signal sending and receiving apparatus distinguish the physical quantity of the geologic parameter, drilling parameter and bore parameters
It is converted to digital signal and the digital signal is encoded, is compressed, launch by carrier of low-frequency electromagnetic wave；
S3, n group grounding electrode acquire the signal of underground signal sending and receiving apparatus transmitting respectively, obtain n group signals, transmit
To ground signal sending and receiving apparatus；
S4, ground signal sending and receiving apparatus by the n groups signal carry out respectively signal amplification, analog-to-digital conversion, filtering and
Demodulation process；
Phase detector in S5, ground signal sending and receiving apparatus is conciliate to described by amplification, analog-to-digital conversion, filtering
Adjust that treated that n group signals are handled：On the basis of No. 1 electrode, No. 2, No. 3 ..., believe obtained by n electrodes and No. 1 electrode
Number phase difference be respectivelyN group signals are carried out according to calculated phase difference
Signal after synchronizing is overlapped processing and reinforced signal, obtains the signal data of underground upload, finally by Phase synchronization
It is shown and is handled on computers.
Further, in a kind of bi-directional electromagnetic measurement while drilling method based on aerial array of the present invention, the ground connection
Electrode length is 0.1-10m, and upper end is cylindric, a diameter of 5-100mm, and lower end sharpening, sharpening partial-length is 1-5cm, institute
The material of grounding electrode is stated using any one of copper, 304 stainless steels, aluminium alloy, resistivity is less than 10-4Ω·m；The ground connection
Electrode is inserted perpendicularly into ground, insertion depth 0.05-10m when being arranged, the spacing between grounding electrode and drilling rod is 10-200m,
Spacing between grounding electrode is more than 5m, and grounding electrode quantity is 2-50；The phase detector selection AD640, AD641,
Any one of AD8302, AD8307, AD8310；The a diameter of 1-50mm of copper conductor used, resistivity are less than 10-6Ω·m。
The present invention also provides a kind of based on the bi-directional electromagnetic of aerial array with control method is bored, and includes the following steps：
S11, underground signal sending and receiving apparatus transmitter phase difference test signal, n groups grounding electrode respectively survey phase difference
Trial signal is acquired, and is obtained n group phase difference test signals and is transmitted to ground signal sending and receiving apparatus；
Phase detector in S12, ground signal sending and receiving apparatus obtains and analyzes the n groups phase difference test letter
Number, on the basis of No. 1 electrode, No. 2, No. 3 ..., the phase difference of signal obtained by n electrodes and No. 1 electrode be respectively Obtain the phase difference of n group phase difference test signals；
S13, the response n groups phase difference test signal, ground signal sending and receiving apparatus send computer needs
Command signal encoded, compression processing, allows n electrode in order of numbers simultaneously with 0, Phase using low-frequency electromagnetic wave as carrier carry out signal transmitting；
S14, underground signal sending and receiving apparatus acquire the n groups signal and are overlapped, and are put to the signal after superposition
Greatly, analog-to-digital conversion, filtering and demodulation process obtain the command signal that computer issues.
The present invention also provides a kind of bi-directional electromagnetic measurement-while-drilling system based on aerial array, by centered on drilling rod
The aerial array of n group grounding electrode framves formation, the ground signal sending and receiving apparatus with phase detector, computer, one end
N roots copper conductor, underground signal sending and receiving apparatus and the underground that the other end that is connected with drilling rod is connected one by one with n grounding electrode are surveyed
Power supply pipe nipple is measured to realize, is comprised the following modules：
Parameter measurement transfer module, for making underground survey power supply pipe nipple measure underground geologic parameter, drilling parameter and well
The underground geologic parameter, drilling parameter and bore parameters are simultaneously transmitted to underground signal sending and receiving apparatus by eye parameter；
Signal switching emission module, for make underground signal sending and receiving apparatus by the geologic parameter, drilling parameter and
The physical quantity of bore parameters is respectively converted into digital signal and encodes the digital signal, compresses, with low-frequency electromagnetic wave
Launch for carrier；
Signal acquisition module, for making n groups grounding electrode acquire the signal of underground signal sending and receiving apparatus transmitting respectively,
N group signals are obtained, ground signal sending and receiving apparatus is transmitted to；
Signal processing module, for make ground signal sending and receiving apparatus by the n groups signal carry out respectively signal amplification,
Analog-to-digital conversion, filtering and demodulation process；
Signal phase synchronizes laminating module, for making the phase detector in ground signal sending and receiving apparatus to the warp
The n group signals crossed after amplification, analog-to-digital conversion, filtering and demodulation process are handled：On the basis of No. 1 electrode, No. 2,3
Number ..., the phase difference of signal obtained by n electrodes and No. 1 electrode be respectivelyRoot
Phase synchronization is carried out to n group signals according to calculated phase difference, the signal after synchronizing, which is overlapped processing, adds signal
By force, the signal data for obtaining underground upload, is finally shown and is handled on computers.
The present invention also provides a kind of based on the bi-directional electromagnetic of aerial array with control system is bored, and comprises the following modules：
Phase difference test signal transmitting module, for making underground signal sending and receiving apparatus transmitter phase difference test signal, n
Group grounding electrode is respectively acquired phase difference test signal, obtains n group phase difference test signals and is transmitted to ground signal
Sending and receiving apparatus；
Phase difference test signal phase difference acquisition module, for making the phase detector in ground signal sending and receiving apparatus
Obtain and analyze the n groups phase difference test signal, on the basis of No. 1 electrode, No. 2, No. 3 ..., n electrodes and No. 1 electrode
The phase difference of gained signal is respectivelyTo obtain n group phase difference test signals
Phase difference 0,
Command signal handles transmitting module, the instruction for making ground signal sending and receiving apparatus need to send by computer
Signal encoded, compression processing, allow n electrode in order of numbers simultaneously with 0,'s
Phase is using low-frequency electromagnetic wave as the computer instruction signal after carrier transmitting coding, compression processing；
Command signal acquisition module is folded for making underground signal sending and receiving apparatus acquire the n groups command signal
Add, the signal after superposition is amplified, analog-to-digital conversion, filtering and demodulation process, obtain the command signal that computer issues.
It is of low cost the beneficial effects of the present invention are the method for offer is easy to operate, make centered on ground is by drilling rod
It is erected a television antenna according to certain rules array system with multiple grounding electrodes, and adds phase inspection in ground signal sending and receiving apparatus
Wave device, it is easy to accomplish field application；Method provided by the invention is by using antenna array system and adds phase inspection
Traditional single antenna signal sending and receiving apparatus is improved to antenna array system and realizes transmitting and receive letter by the method for wave device
Number in-phase stacking, be applied to electromagnetic measurement while drilling in, improve the emissive porwer and receiving sensitivity of signal, and then effectively carry
High bi-directional electromagnetic wave measurement while drilling signal transmission distance can enhance ground receiver and emit the intensity of signal, to improve electricity
The transmission range of magnetic wave measurement while drilling signal.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is that signal of the embodiment of the present invention uploads flow chart；
Fig. 2 is to pass flow chart under signal of the embodiment of the present invention；
Fig. 3 is 1 electromagnetic measurement while drilling system schematic of the embodiment of the present invention；
Fig. 4 is 2 electromagnetic measurement while drilling system schematic of the embodiment of the present invention.
Figure label explanation：1- computers；2- ground signals sending and receiving apparatus (inside has phase detector)；3- connects
Ground electrode；4- drilling rods；5- underground signal sending and receiving apparatus；6- measures power supply pipe nipple.
Specific implementation mode
In order to which the technical features, objects and effects to invention are more clearly understood, now compare attached drawing and this is described in detail
The specific implementation mode of invention.
It is described to measure aerial array that control method formed by the n group grounding electrode framves centered on drilling rod, with phase
The ground signal sending and receiving apparatus of wave detector, computer, one end other end that is connected with drilling rod are connected one by one with n grounding electrode
N roots copper conductor, underground signal sending and receiving apparatus and underground survey power supply pipe nipple realize that measurement method includes following step
Suddenly：
S1, underground survey power supply pipe nipple measure underground geologic parameter, drilling parameter and bore parameters and by the underground
Matter parameter, drilling parameter and bore parameters are transmitted to underground signal sending and receiving apparatus；
S2, underground signal sending and receiving apparatus distinguish the physical quantity of the geologic parameter, drilling parameter and bore parameters
It is converted to digital signal and the digital signal is encoded, is compressed, launch by carrier of low-frequency electromagnetic wave；
S3, n group grounding electrode acquire the signal of underground signal sending and receiving apparatus transmitting respectively, obtain n group signals, transmit
To ground signal sending and receiving apparatus；
S4, ground signal sending and receiving apparatus by the n groups signal carry out respectively signal amplification, analog-to-digital conversion, filtering and
Demodulation process；
Phase detector in S5, ground signal sending and receiving apparatus is conciliate to described by amplification, analog-to-digital conversion, filtering
Adjust that treated that n group signals are handled：On the basis of No. 1 electrode, No. 2, No. 3 ..., believe obtained by n electrodes and No. 1 electrode
Number phase difference be respectivelyN group signals are carried out according to calculated phase difference
Signal after synchronizing is overlapped processing and reinforced signal, obtains the signal data of underground upload, finally by Phase synchronization
It is shown and is handled on computers.
Further, in a kind of bi-directional electromagnetic measurement while drilling method based on aerial array of the present invention, the ground connection
Electrode length is 0.1-10m, and upper end is cylindric, a diameter of 5-100mm, and lower end sharpening, sharpening partial-length is 1-5cm, institute
The material of grounding electrode is stated using any one of copper, 304 stainless steels, aluminium alloy, resistivity is less than 10-4Ω·m；The ground connection
Electrode is inserted perpendicularly into ground, insertion depth 0.05-10m when being arranged, the spacing between grounding electrode and drilling rod is 10-200m,
Spacing between grounding electrode is more than 5m, and grounding electrode quantity is 2-50；The phase detector selection AD640, AD641,
Any one of AD8302, AD8307, AD8310；The a diameter of 1-50mm of copper conductor used, resistivity are less than 10-6Ω·m。
The present invention also provides a kind of based on the bi-directional electromagnetic of aerial array with control method is bored, and includes the following steps：
S11, underground signal sending and receiving apparatus transmitter phase difference test signal, n groups grounding electrode respectively survey phase difference
Trial signal is acquired, and is obtained n group phase difference test signals and is transmitted to ground signal sending and receiving apparatus；
Phase detector in S12, ground signal sending and receiving apparatus obtains and analyzes the n groups phase difference test letter
Number, on the basis of No. 1 electrode, No. 2, No. 3 ..., the phase difference of signal obtained by n electrodes and No. 1 electrode be respectively Obtain the phase difference of n group phase difference test signals；
S13, the response n groups phase difference test signal, ground signal sending and receiving apparatus send computer needs
Command signal encoded, compression processing, allows n electrode in order of numbers simultaneously with 0, Phase using low-frequency electromagnetic wave as carrier carry out signal transmitting；
S14, underground signal sending and receiving apparatus acquire the n groups signal and are overlapped, and are put to the signal after superposition
Greatly, analog-to-digital conversion, filtering and demodulation process obtain the command signal that computer issues.
Embodiment 1：Referring to Fig. 3, a kind of bi-directional electromagnetic measurement while drilling method and system based on aerial array of the invention,
Grounding electrode number is 2 wherein in antenna array system, and operating procedure is as follows：
(1), erected a television antenna array system using 2 grounding electrodes 3 centered on ground is by drilling rod 4.Single grounding electrode 3
Length is 0.5m, and upper end is cylindric, a diameter of 10mm, and lower end sharpening, sharpening partial-length is 2cm, and material is all made of 304 not
Become rusty steel.Require to be inserted perpendicularly into ground when grounding electrode 3 is arranged, depth 0.5m, 3 quantity of grounding electrode is 2,2 piece-root graftings it is electric
The distance between pole 3 and drilling rod 4 are 50m, and the spacing between 2 piece-root grafting ground electrodes 3 is 100m, and 2 piece-root grafting ground electrodes 3 are numbered successively
For No. 1 and No. 2.
(2), in ground signal sending and receiving apparatus 2 have AD8302 phase detectors, be used in combination 2 copper conductor one end and
Drilling rod 4 is connected, and one end and 2 grounding electrodes 3 of setting are respectively connected with, and copper conductor used requires a diameter of 2mm.
(3), in two-way EM-MWD system signals upload procedure, underground geology is measured by underground survey power supply pipe nipple 6 first
Then corresponding geologic parameter, drilling parameter and bore parameters physical quantity are transferred to well by parameter, drilling parameter and bore parameters etc.
Lower signal sending and receiving apparatus 5 is converted to digital signal, and relevant digital signal is after the processing works such as encoding, compressing, most
Launch afterwards by carrier of low-frequency electromagnetic wave.Grounding electrode receives signal respectively, and ground signal sending and receiving apparatus 2 will be grounded
After 2 groups of signals of electrode acquisition carry out amplification, analog-to-digital conversion, filtering and demodulation of signal etc. reason respectively, phase detection is transferred to
Device is handled, and on the basis of No. 1 grounding electrode 3, the phase difference of No. 2 grounding electrodes 3 and No. 13 gained signal of grounding electrode isPhase synchronization is carried out according to 2 groups of signals of calculated phase difference pair, the signal after synchronizing is overlapped processing to signal
Reinforced, obtains the signal data of underground upload, finally shown and handled on computer 1.
(4) during, biography under two-way EM-MWD system signals, first by 5 transmitter phase of underground signal sending and receiving apparatus
Poor test signal, aerial array transfer to phase detector to be handled after collecting phase difference test signal, with No. 1 grounding electrode
On the basis of, the phase difference of No. 2 grounding electrodes and signal obtained by No. 1 grounding electrode isThen ground signal transmitting receives
After computer is needed the control instruction data that send the processing works such as to be encoded, compressed by device, 2 grounding electrodes are finally allowed
3 in order of numbers simultaneously with 0,Phase using low-frequency electromagnetic wave as carrier carry out signal transmitting, underground signal transmitting connects
5 acquisition control signal of receiving apparatus simultaneously obtains the control that passes down of computer after amplification, analog-to-digital conversion, filtering and demodulation etc. reason and refers to
It enables.
Embodiment 2：Referring to Fig. 4, a kind of bi-directional electromagnetic measurement while drilling method based on aerial array of the invention, wherein day
Grounding electrode number is 3 in line-array systems, and operating procedure is as follows：
(1), erected a television antenna array system using 3 grounding electrodes 3 centered on ground is by drilling rod 4.Single grounding electrode 3
Length is 1m, and upper end is cylindric, a diameter of 15mm, and lower end sharpening, sharpening partial-length is 3cm, and material uses red copper.Ground connection
It requires to be inserted perpendicularly into ground, depth 1m when electrode 3 is arranged, 3 quantity of grounding electrode is 3, and 3 piece-root grafting ground electrodes 3 are with drilling rod 4
Center arrangement in equilateral triangle, the distance between 3 piece-root grafting ground electrodes 3 and drilling rod 4 are 100m, between 3 piece-root grafting ground electrodes 3
Spacing is 173m, and 3 piece-root grafting ground electrodes 3 number is followed successively by No. 1, No. 2 and No. 3.
(2), in ground signal sending and receiving apparatus 2 there is AD8310 phase detectors, 3 copper conductor one end are used in combination and bore
Bar 4 is connected, and one end and 3 grounding electrodes 3 of setting are respectively connected with, and copper conductor used requires a diameter of 5mm.
(3), in two-way EM-MWD system signals upload procedure, underground geology is measured by underground survey power supply pipe nipple 6 first
Then parameter, drilling parameter and bore parameters are transferred to corresponding underground geologic parameter, drilling parameter and bore parameters physical quantity
Underground signal sending and receiving apparatus 5 is converted to digital signal, relevant digital signal after the processing works such as encoding, compressing,
Finally launch by carrier of low-frequency electromagnetic wave.The antenna array receiver signal of grounding electrode composition, ground signal transmitting connect
After 3 groups of signals that aerial array acquires are carried out amplification, analog-to-digital conversion, filtering and demodulation of signal etc. reason by receiving apparatus 2 respectively,
Phase detector is transferred to be handled, on the basis of No. 1 grounding electrode 3, No. 2 grounding electrodes 3 and No. 3 grounding electrodes 3 and No. 1
The phase difference of 3 gained signal of grounding electrode is respectivelyWithPhase between obtaining the reception signal of each grounding electrode 3
After difference, 3 groups of signals of ground signal sending and receiving apparatus pair carry out Phase synchronization and Signal averaging processing, obtain the letter of underground upload
Number is finally shown and is handled on computer 1.
(4) during, biography under two-way EM-MWD system signals, emitted by underground signal sending and receiving apparatus 5 believe first
Number, aerial array transfers to phase detector to be handled after collecting signal, on the basis of No. 1 grounding electrode, No. 2 grounding electrodes
The phase difference of 3 and No. 3 grounding electrodes 3 and No. 13 gained signal of grounding electrode isWithThen ground signal transmitting connects
After the control instruction data that computer is sent the processing works such as are encoded, compressed by receiving apparatus, allow 3 grounding electrodes 3 by volume
Number sequence simultaneously with 0,Phase using low-frequency electromagnetic wave as carrier carry out signal transmitting, underground signal transmitting
Reception device acquires 53 groups of signals and is overlapped, to the signal after superposition through amplification, analog-to-digital conversion, filtering and demodulation etc.
The control instruction that computer passes down is obtained after reason.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (5)
1. a kind of bi-directional electromagnetic measurement while drilling method based on aerial array, by the n group grounding electrode frame shapes centered on drilling rod
At aerial array, the ground signal sending and receiving apparatus with phase detector, computer, one end be connected the other end with drilling rod
N roots copper conductor, underground signal sending and receiving apparatus and the underground survey power supply pipe nipple being connected one by one with n grounding electrode come real
It is existing, which is characterized in that include the following steps：
S1, underground survey power supply pipe nipple measure underground geologic parameter, drilling parameter and bore parameters and join the underground geology
Number, drilling parameter and bore parameters are transmitted to underground signal sending and receiving apparatus；
S2, underground signal sending and receiving apparatus convert the physical quantity of the geologic parameter, drilling parameter and bore parameters respectively
It encoded, compressed for digital signal and by the digital signal, launched by carrier of low-frequency electromagnetic wave；
S3, n group grounding electrode acquire the signal of underground signal sending and receiving apparatus transmitting respectively, obtain n group signals, are transmitted to ground
Face signal sending and receiving apparatus；
The n groups signal is carried out signal amplification, analog-to-digital conversion, filtering and demodulation by S4, ground signal sending and receiving apparatus respectively
Processing；
Phase detector in S5, ground signal sending and receiving apparatus is mediated by amplification, analog-to-digital conversion, filtering reconciliation described
N group signals after reason are handled：On the basis of No. 1 electrode, No. 2, No. 3 ..., signal obtained by n electrodes and No. 1 electrode
Phase difference is respectivelyPhase is carried out to n group signals according to calculated phase difference
It is synchronous, the signal after synchronizing is overlapped processing, signal is reinforced, obtained the signal data of underground upload, finally counting
It is shown and is handled on calculation machine.
2. a kind of bi-directional electromagnetic measurement while drilling method based on aerial array according to claim 1, which is characterized in that described
Grounding electrode length is 0.1-10m, and upper end is cylindric, a diameter of 5-100mm, and lower end sharpening, sharpening partial-length is 1-
5cm, for the material of the grounding electrode using any one of copper, 304 stainless steels, aluminium alloy, resistivity is less than 10-4Ω·m；Institute
Ground, insertion depth 0.05-10m are inserted perpendicularly into when stating grounding electrode setting, the spacing between grounding electrode and drilling rod is 10-
200m, the spacing between grounding electrode are more than 5m, and grounding electrode quantity is 2-50；The phase detector selection AD640,
Any one of AD641, AD8302, AD8307, AD8310；The a diameter of 1-50mm of copper conductor used, resistivity are less than 10-6Ω·
m。
3. it is a kind of based on the bi-directional electromagnetic of aerial array with bore control method, which is characterized in that include the following steps：
S11, underground signal sending and receiving apparatus transmitter phase difference test signal, n groups grounding electrode, which respectively tests phase difference, to be believed
It number is acquired, obtains n group phase difference test signals and be simultaneously transmitted to ground signal sending and receiving apparatus；
Phase detector in S12, ground signal sending and receiving apparatus obtains and analyzes the n groups phase difference test signal, with 1
On the basis of number electrode, No. 2, No. 3 ..., the phase difference of signal obtained by n electrodes and No. 1 electrode be respectively To obtain the phase difference of n group phase difference test signals
Computer needs the command signal that sends to be encoded by S13, ground signal sending and receiving apparatus, compression processing, allows n
Electrode in order of numbers simultaneously withPhase be with low-frequency electromagnetic wave
Computer instruction signal after carrier transmitting coding, compression processing；
S14, underground signal sending and receiving apparatus acquire the n groups command signal and are overlapped, and are put to the signal after superposition
Greatly, analog-to-digital conversion, filtering and demodulation process obtain the command signal that computer issues.
4. a kind of bi-directional electromagnetic measurement-while-drilling system based on aerial array, by the n group grounding electrode frame shapes centered on drilling rod
At aerial array, the ground signal sending and receiving apparatus with phase detector, computer, one end be connected the other end with drilling rod
N roots copper conductor, underground signal sending and receiving apparatus and the underground survey power supply pipe nipple being connected one by one with n grounding electrode come real
It is existing, which is characterized in that comprise the following modules：
Parameter measurement transfer module, for making underground survey power supply pipe nipple measure underground geologic parameter, drilling parameter and wellbore ginseng
The underground geologic parameter, drilling parameter and bore parameters are simultaneously transmitted to underground signal sending and receiving apparatus by number；
Signal switching emission module, for making underground signal sending and receiving apparatus by the geologic parameter, drilling parameter and wellbore
The physical quantity of parameter is respectively converted into digital signal and encodes the digital signal, compresses, and is to carry with low-frequency electromagnetic wave
Body is launched；
Signal acquisition module is obtained for making n groups grounding electrode acquire the signal of underground signal sending and receiving apparatus transmitting respectively
N group signals, are transmitted to ground signal sending and receiving apparatus；
Signal processing module, for making ground signal sending and receiving apparatus that the n groups signal is carried out signal amplification, modulus respectively
Conversion, filtering and demodulation process；
Signal phase synchronizes laminating module, for making the phase detector in ground signal sending and receiving apparatus to described by putting
Greatly, the n group signals after analog-to-digital conversion, filtering and demodulation process are handled：On the basis of No. 1 electrode, No. 2, No. 3 ..., n
The phase difference of signal obtained by number electrode and No. 1 electrode is respectivelyAccording to calculated
Phase difference carries out Phase synchronization to n group signals, and the signal after synchronizing, which is overlapped processing, reinforces signal, obtains underground
The signal data of upload is finally shown and is handled on computers.
5. it is a kind of based on the bi-directional electromagnetic of aerial array with bore control system, which is characterized in that comprise the following modules：
Phase difference test signal transmitting module, for making underground signal sending and receiving apparatus transmitter phase difference test signal, n groups connect
Ground electrode is respectively acquired phase difference test signal, obtains n group phase difference test signals and is transmitted to ground signal transmitting
Reception device；
Phase difference test signal phase difference acquisition module, for making the phase detector in ground signal sending and receiving apparatus obtain
And analyze the n groups phase difference test signal, on the basis of No. 1 electrode, No. 2, No. 3 ..., obtained by n electrodes and No. 1 electrode
The phase difference of signal is respectivelyTo obtain the phase of n group phase difference test signals
Potential difference
Command signal handles transmitting module, the command signal for making ground signal sending and receiving apparatus need to send by computer
Encoded, compression processing, allow n electrode in order of numbers simultaneously with
Phase using low-frequency electromagnetic wave as carrier transmitting coding, the computer instruction signal after compression processing；
Command signal acquisition module is overlapped for making underground signal sending and receiving apparatus acquire the n groups command signal, right
Signal after superposition is amplified, analog-to-digital conversion, filtering and demodulation process, obtain the command signal that computer issues.
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