CN114726460B - Inter-well mirror image differential current type ground transceiving antenna device and communication method thereof - Google Patents
Inter-well mirror image differential current type ground transceiving antenna device and communication method thereof Download PDFInfo
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Abstract
The invention relates to an interwell mirror image differential current type ground transceiving antenna device and a communication method thereof, wherein the device comprises: the system comprises a current signal transceiving module, a mirror image difference module, a well site noise analysis module and a terminal module, wherein the current signal transceiving module comprises a main current sensor and an auxiliary current sensor which are respectively arranged at well mouths of a target well and adjacent wells thereof; and the underground equipment of the target well form a loop; the mirror image difference module is used for carrying out difference processing on the current signals of the current signal transceiving module; the well site noise analysis module is used for collecting well site noise and filtering the single-ended signal; and the terminal module is used for communicating with the downhole equipment of the target well through a loop. According to the invention, through differential processing of the received noise-containing current signals of the target well and the adjacent wells, effective signals are enhanced, noise is greatly inhibited, the signal-to-noise ratio of the received signals is further improved, and microampere-level extremely-low-frequency current signals can be accurately extracted from ampere-level noise.
Description
Technical Field
The invention belongs to the field of underground wireless communication, particularly relates to the field of underground extremely-low-frequency wireless communication, and particularly relates to an inter-well mirror image differential current type ground transceiving antenna device and a communication method thereof.
Background
With the rapid development of oil field digitization and informatization, the underground wireless communication technology becomes a key means for real-time sensing of underground data and ground remote control of underground equipment, wherein the underground wireless communication taking extremely low frequency electromagnetic waves as information carriers is the current research hot.
When the ground transceiving antenna is used as a signal receiving source and the underground equipment is used as a signal emitting source, the underground equipment converts the parameters of the producing layer into extremely low frequency current signals (1Hz to 30Hz), and the extremely low frequency current signals are transmitted to the ground side through complex media such as oil pipes, sleeves, stratums and the like. Because the space of the underground transmitting antenna is narrow and small, and the battery is adopted for power supply, the strength of the transmitting signal is extremely limited, and meanwhile, when the current signal is transmitted to the ground through the attenuation influence of a complex medium of thousands of meters, the effective signal on the ground side is only microampere current. The noise at the receiving source is composed of complex noise sources such as thermoelectric potential of temperature difference, chemical potential, space induction potential and the like, wherein the noise mainly comes from an oversized metal grounding group composed of an oil gas metering station and an output oil collecting main line thereof, the ampere level is achieved, and the noise interference is extremely large. Therefore, it is a difficult problem to extract and demodulate a valid signal from an environment with a very low signal-to-noise ratio by a terrestrial transceiving antenna.
When the ground transceiving antenna is used as a signal emitting source and the underground equipment is used as a signal receiving source, because the ground emitting source is not influenced by space and electric quantity, the underground receiving source can still receive effective signals meeting the strength requirement despite transmission attenuation, and the development of the ground transceiving antenna is mainly hindered by the realization of a high-performance signal receiving function.
Since the current signal transmitted downhole flows in a wide area space, a potential difference is formed between any two points. Based on the principle, the traditional ground transceiving antenna is of an asymmetric voltage pickup type, and effective information is demodulated by measuring a potential difference signal between a wellhead of a well to be detected and a far-end grounding pile. The single-ended potential difference signal acquired by the traditional method is extremely easy to interfere by a strong noise environment, so that the signal-to-noise ratio of the received signal is extremely low, and further demodulation cannot be performed frequently. In addition, the remote grounding pile is limited in installation position and prone to failure due to the influence of complex well site environment and underground electric grounding grids. In conclusion, how to develop a novel ground transceiving antenna from the perspective of antenna symmetrical arrangement and signal acquisition type has important significance for the development of the underground wireless communication technology.
Disclosure of Invention
In order to improve the signal-to-noise ratio of the underground wireless communication, extract effective information from the signal-to-noise ratio and widen the effective application scene of the underground wireless communication, in a first aspect of the present invention, there is provided an inter-well mirror image differential current type ground transceiving antenna apparatus, comprising: the system comprises a current signal transceiving module, a mirror image difference module, a well site noise analysis module and a terminal module, wherein the current signal transceiving module comprises a main current sensor and one or more auxiliary current sensors, and the main current sensor and the auxiliary current sensors are respectively arranged at the well mouth of a target well and the well mouths of adjacent wells; each auxiliary current sensor forms a loop with the main current sensor and the underground equipment of the target well through the oil pipe transmission section and the interwell stratum; the mirror image difference module is used for carrying out difference processing on the current signal with noise of the current signal transceiving module and outputting the current signal with noise as a single-ended signal of the target well; the well site noise analysis module is used for collecting the characteristic quantity of the well site noise and filtering the single-ended signal by utilizing the characteristic quantity; and the terminal module is used for modulating or decomposing the single-ended signal of the target well and communicating with the downhole equipment of the target well through the loop.
In a second aspect of the present invention, there is provided a communication method for an inter-well mirror image differential current type surface transceiver antenna apparatus according to the first aspect, including: when the ground transceiving antenna device is in a signal receiving working condition: the underground equipment of the target well modulates the measured underground data into a current signal, the current signal is transmitted to the ground side along an oil pipe, and the main current sensor and the N auxiliary current sensors respectively sense and output noise-containing current signals on the oil pipes of corresponding well mouths; when the ground transceiving antenna device is in a signal transmitting working condition: the terminal module modulates a control command of a target well into a signal, inputs the signal into the mirror image differential module, and outputs a differential signal through inverse decomposition; the differential signals are respectively input to the main current sensor and the auxiliary current sensor, and effective current signals are induced on the oil pipe and transmitted downwards along the oil pipe, so that underground equipment of the target well is controlled.
In a third aspect of the present invention, there is provided an electronic device comprising: one or more processors; storage means for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to carry out the method of the invention as provided in the second aspect.
In a fourth aspect of the invention, a computer-readable medium is provided, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method provided by the invention in the second aspect.
The invention has the beneficial effects that:
1. when a current signal transmitted by underground equipment flows back along a specific loop, at the well mouth of a specified well, the current flows from the underground side to the ground side, and at the well mouths of N adjacent wells, the current flows from the ground side to the underground side, so that the effective current signals received by the main current sensor and the auxiliary current sensor have reverse directions; and the noise of the well head of the designated well and N adjacent wells comes from the oversized metal grounding group formed by the same oil and gas metering station and an output oil collecting main line thereof, the noise intensity is similar, and the isotropy exists. According to the inter-well image differential current type ground transceiving antenna device, the received noise-containing current signals of the specified well on the ground and the well mouth of the adjacent well are collected, and the difference calculation is carried out on the received noise-containing current signals by utilizing the reverse direction and the noise isotropy of effective signals, so that the effective signal strength is enhanced, the noise is greatly inhibited, the signal-to-noise ratio of the received signals is further improved, and microampere-level extremely-low-frequency current signals can be accurately extracted from ampere-level noise interference;
2. compared with an asymmetric voltage pickup type antenna, the ground receiving signal-to-noise ratio of the image current pickup type antenna between wells can be improved by at least 20dB, which is equivalent to that the underground wireless transmission distance is prolonged by 2000m, and effective support is provided for the development of the current full-well wireless communication technology of deep wells and ultra-deep wells;
3. based on the integrated structure for realizing the receiving function, an excitation source meeting the signal strength requirement is provided in the terminal module, and the device can simultaneously realize the remote instruction sending to the underground equipment to be controlled.
Drawings
Fig. 1 is a schematic structural diagram of an interwell mirror differential current mode surface transceiver antenna assembly in some embodiments of the present invention;
fig. 2 is a schematic flow chart of the receiving and transmitting signals of the inter-well image differential current type surface transceiver antenna device according to some embodiments of the present invention;
fig. 3 is a schematic current loop diagram of an interwell mirrored differential current mode surface transceiver antenna assembly in some embodiments of the present invention;
fig. 4 is a schematic flow chart of a communication method of an interwell mirror differential current mode surface transceiver antenna assembly in some embodiments of the invention;
fig. 5 is a schematic structural diagram of an electronic device in some embodiments of the invention.
Reference numerals
1. A main current sensor;
2: a mirror image difference module; 3. a terminal module; 4. a noise sensor; 5. a filtering analysis module; 6. designating a well;
: designating a well adjacent to the well;
7. specifying downhole equipment; 8. an oil pipe transmission section; 9. a wellhead tubing section; 10. the oil gas metering station and the ground are connected with a metal pipeline; 11. an interwell formation; 12. and outputting an oil collecting main line.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, in a first aspect of the present invention, there is provided an interwell mirror differential current mode surface transceiver antenna apparatus comprising: the system comprises a current signal transceiving module, a mirror image difference module 2, a well site noise analysis module and a terminal module 3, wherein the current signal transceiving module comprises a main current sensor 1 and one or more auxiliary current sensors
The main current sensor 1 and the auxiliary current sensor are respectively arranged at the well mouth of the target well and the well mouths of adjacent wells; and each secondary current sensor is transmitted through the oil pipeThe transmission section and the interwell stratum 11 form a loop with the main current sensor 1 and the underground equipment of the target well; the mirror image difference module 2 is used for carrying out difference processing on the current signal with noise of the current signal transceiving module and outputting the current signal with noise as a single-ended signal of a target well; the well site noise analysis module is used for collecting the characteristic quantity of the well site noise and filtering the single-ended signal by utilizing the characteristic quantity; and the terminal module 3 is used for modulating or decomposing the single-ended signal of the target well and communicating with the downhole equipment of the target well through the loop.
Specifically, as shown in fig. 1, the current signal transceiver module comprises 1 main current sensor 1 and N auxiliary current sensors
The main current sensor 1 is arranged on an oil pipe section 9 at the wellhead of the appointed well 6, and the auxiliary current sensor
N adjacent wells installed in the designated well 6
A wellhead tubing section 9. The designated well 6 and the adjacent well
The method is characterized in that the same oil and gas metering station 10 is connected, metal connection is formed between two wells through the oil and gas metering station 10 and a ground pipeline, the oil and gas metering station 10 is provided with an output oil collecting main line 12, and a ground side inter-well circulation path can be provided for transmitting current signals of underground equipment 7 in a designated well 6. The wellsite noise analysis module consists of a noise sensor 4 and a filtering analysis module 5, wherein the noise sensor 4 is arranged at an output oil collecting trunk line 12 of an oil and gas metering station 10; the main current sensor 1 and the sub current sensor
The noise sensor 4 and the annular coil sensor are open type annular coil sensors, and an electric signal is extracted from an oil pipe or is in the oil through the electromagnetic induction effectAn electrical signal is induced on the tube.
Preferably, the primary current sensor 1 and the secondary current sensor
The noise sensor 4 and the oil pipe are both open type annular coil sensors, and an electric signal is extracted from the oil pipe or induced on the oil pipe through the electromagnetic induction effect.
It will be appreciated that the oil and gas metering station 10 is in metallic communication with the designated well 6 (or target well) and its N adjacent wells via surface pipelines. The current signal transmitted by the downhole device is a very low frequency current signal (1Hz to 30 Hz). The noise at the well head of the designated well 6 and the adjacent wells received by the current signal transceiver module mainly comes from an oversized metal grounding group formed by the same oil and gas metering station 10 and an output oil collecting main line 12 thereof, and the noise intensity at the well head is in the same order of magnitude.
It should be noted that, in the loop (transmitting loop or receiving loop) configured as above, there is a specific current loop, so that a current signal can flow through the specified downhole device 7, the main current sensor 1, and the nth adjacent well wellhead secondary current sensor (N is 1,2, 3 … … N-1, N), where the specific current loop is: the method comprises the steps of specifying the anode of downhole equipment 7 of the well, specifying the oil pipe of the well 6 (a specified well part in a well head oil pipe section 9), specifying the well 6 mouth (provided with a main current sensor 1), specifying the well 6 to be connected with the Nth adjacent well through metal, the Nth adjacent well mouth (provided with an auxiliary current sensor), the oil pipe of the Nth adjacent well, specifying the well 6 to be connected with the Nth adjacent well through the auxiliary current sensor, and the cathode of the downhole equipment 7 of the specified well.
As shown in fig. 3, to designate a well 6 and an adjacent well
For example, it is described that the current signal emitted by the downhole equipment 7 of a given well flows through the main current sensor 1 at the wellhead tubing of the given well 6 and the adjacent well
Auxiliary current sensor at well mouth oil pipe
The return path of (2): the current signal is sent from the positive pole of the underground equipment 7 of the designated well and sequentially flows through the oil pipe transmission section 8 of the designated well 6, the well mouth (provided with the main current sensor 1) of the designated well 6, the designated well 6 and the adjacent well
Inter-surface metal pipeline 10, adjacent well
Wellhead (with auxiliary current sensor)
) Adjacent well
The oil pipe transmission section 8, the interwell stratum 11 and the cathode of the downhole equipment 7 of the designated well 6. The current loop can ensure that signals can simultaneously flow through the main current sensor 1 and the auxiliary current sensor
And a main current sensor 1 and a sub current sensor
The received effective current signal is in the opposite direction. The current signal emitted by the downhole device 7 flows through the secondary current sensor
Similar to the return path described above.
The designated well 6 and the adjacent wells
The noise at the well head oil pipe 9 mainly comes from the oversized metal grounding group formed by the same oil gas metering station 10 and the output oil collecting main line 12 thereof, becauseThe designated well and the adjacent well have mirror symmetry, so the noise intensity at the well mouth is in the same order of magnitude.
The noise-containing signal received by the mirror image difference module 2 and output by the main current sensor 1 can be represented as
The noise-containing current signals received from the N secondary current sensors can be expressed as
(N is 1,2, 3 … … N-1, N), and the single-ended signal to be tested is output as
. Wherein the content of the first and second substances,
，
，
for the effective current signal at the well mouth of the designated well 6,
The noise intensity of the well mouth of the designated well 6,
Is an effective current signal at the well mouth of an adjacent well,
The noise intensity at the well mouth of the adjacent well,
For the effective current signal in the single-ended signal to be tested,
The noise intensity in the single-ended signal to be measured. Compared with an asymmetric voltage pickup type transceiving antenna for collecting a single signal, the inter-well mirror image type differential current type transceiving antenna can greatly inhibit the interference of homologous noise while enhancing the current intensity of an effective signal in a noise-containing signal, thereby improving the signal-to-noise ratio of a received signal.
Referring to fig. 2 and 3, based on the above-mentioned loop, the terrestrial transceiving antenna device has at least two working conditions of receiving and transmitting: when the ground transceiving antenna device is in a signal receiving working condition: the method comprises the steps that downhole equipment (appointed downhole equipment 7) of a target well modulates measured downhole data into current signals, the current signals are transmitted to the ground side along an oil pipe, the main current sensor 1 and N auxiliary current sensors respectively sense and output noise-containing current signals on the oil pipe of a corresponding well mouth, and N is larger than or equal to 1. The underground equipment 7 positioned in the appointed well modulates the measured data of the underground temperature, the pressure, the flow and the like into an extremely low frequency current signal, the extremely low frequency current signal is transmitted to the ground side along the oil pipe, and the main current sensor 1 and the auxiliary current sensor
Respectively sensing and outputting a noise-containing current signal on a corresponding wellhead oil pipe; the mirror image difference module 2 outputs a single-ended signal to be detected after performing difference processing on the output (N +1) noise-containing current signals; the filtering analysis module 5 extracts well site noise characteristic quantity from the well site noise collected by the noise sensor 4, and generates a real-time filtering coefficient for filtering processing of the single-ended signal to be detected; and the filtered signal is input to the terminal module 3 for demodulation and display.
The noise-containing current signal output by the main current sensor 1 and received by the mirror image difference module 2 is represented as
And the noise-containing current signals received from the N secondary current sensors are represented as:
(N is 1,2, 3 … … N-1, N), and the single-ended signal to be tested is output as
；
In the formula (I), the compound is shown in the specification,
，
，
is an effective current signal at the wellhead of a target well,
The noise intensity of the well mouth of the target well,
For the effective current signal at the well mouth of the adjacent well,
The noise intensity at the well mouth of the adjacent well,
Is an effective current signal in a single-ended signal of a target well,
The noise intensity in the single-ended signal of the target well.
When the ground transceiving antenna device is in a signal receiving working condition, the directions of effective current signals received by the main current sensor 1 and the N auxiliary current sensors are opposite.
Specifically, the differential signals output by the mirror image differential module 2 are converted by the main current sensor 1 and the auxiliary current sensors, and effective current signals are induced at wellhead oil pipes of the target well and the N adjacent wells thereof, which are respectively represented as
(N is 1,2, 3 … … N-1, N), wherein,
. The terminal module 3 modulates a control command and directly inputs the control command to the mirror image difference module 2, and differential signals are output through inverse decomposition; the differential signals are respectively input into the main current sensor and the auxiliary current sensor, and effective current signals are respectively induced on the well mouth oil pipes of the designated well 6 and the adjacent wells
(N is 1,2, 3 … … N-1, N), and the current loop shown in figure 3 is transmitted to the underground to control the underground equipment, so as to realize the effective control of a series of intelligent equipment such as a perforating gun, an intelligent sliding sleeve, an intelligent throttle valve and the like, wherein,
。
example 2
Referring to fig. 4, a second aspect of the present invention provides a communication method for an inter-well image differential current mode surface transceiver antenna apparatus according to the first aspect, including: s100, when the ground transceiving antenna device is in a signal receiving working condition: the underground equipment of the target well modulates the measured underground data into a current signal, the current signal is transmitted to the ground side along an oil pipe, and the main current sensor and the N auxiliary current sensors respectively sense and output noise-containing current signals on the oil pipe of the corresponding well mouth; s200, when the ground transceiving antenna device is in a signal transmitting working condition: the terminal module modulates a control command of a target well into a signal, inputs the signal into the mirror image differential module, and outputs a differential signal through inverse decomposition; the differential signals are respectively input to the main current sensor and the auxiliary current sensor, and effective current signals are induced on the oil pipe and transmitted downwards along the oil pipe, so that underground equipment of the target well is controlled.
Further, the modulating the control command of the target well into a signal by the terminal module comprises: and the terminal modulates the control signaling of the downhole equipment of the target well into a very low frequency signal.
Example 3
Referring to fig. 5, in a third aspect of the present invention, there is provided an electronic apparatus comprising: one or more processors; storage means for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to carry out the method of the invention in the second aspect.
The electronic device 500 may include a processing means (e.g., central processing unit, graphics processor, etc.) 501 that may perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM)502 or a program loaded from a storage means 508 into a Random Access Memory (RAM) 503. In the RAM 503, various programs and data necessary for the operation of the electronic apparatus 500 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.
The following devices may be connected to the I/O interface 505 in general: input devices 506 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; output devices 507 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; a storage device 508 including, for example, a hard disk; and a communication device 509. The communication means 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. While fig. 5 illustrates an electronic device 500 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may alternatively be implemented or provided. Each block shown in fig. 5 may represent one device or may represent multiple devices as desired.
In particular, the processes described above with reference to the flow diagrams may be implemented as computer software programs, according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication means 509, or installed from the storage means 508, or installed from the ROM 502. The computer program, when executed by the processing device 501, performs the above-described functions defined in the methods of embodiments of the present disclosure. It should be noted that the computer readable medium described in the embodiments of the present disclosure may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In embodiments of the present disclosure, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
The computer readable medium may be embodied in the electronic device; or may be separate and not incorporated into the electronic device. The computer readable medium carries one or more computer programs which, when executed by the electronic device, cause the electronic device to:
computer program code for carrying out operations for embodiments of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, Python, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An interwell image differential current type ground transceiving antenna device, comprising: a current signal receiving and transmitting module, a mirror image difference module, a well site noise analysis module and a terminal module,
the current signal transceiving module comprises a main current sensor and one or more auxiliary current sensors, and the main current sensor and the auxiliary current sensors are respectively arranged at the well mouth of the target well and the well mouths of adjacent wells; each auxiliary current sensor forms a loop with the main current sensor and the underground equipment of the target well through the oil pipe transmission section and the interwell stratum;
the mirror image difference module is used for carrying out difference processing on the current signal with noise of the current signal transceiving module and outputting the current signal with noise as a single-ended signal of the target well;
the well site noise analysis module is used for collecting the characteristic quantity of the well site noise and filtering the single-ended signal by utilizing the characteristic quantity;
and the terminal module is used for modulating or decomposing the single-ended signal of the target well and communicating with the downhole equipment of the target well through the loop.
2. The interwell mirrored differential current surface transceiver antenna assembly of claim 1, wherein when the surface transceiver antenna assembly is in a signal receiving condition:
and the underground equipment of the target well modulates the measured underground data into a current signal, the current signal is transmitted to the ground side along the oil pipe, the main current sensor and the N auxiliary current sensors respectively sense and output noise-containing current signals on the oil pipe of the corresponding well mouth, wherein N is more than or equal to 1.
3. The interwell mirrored differential current surface transceiver antenna assembly as claimed in claim 2, wherein the mirrored differential module receives a noisy current signal from the primary current sensor asI 0 +I n0 The noise-containing current signals received from the N secondary current sensors are expressed as-I i +I ni The differential processing outputs the single-ended signal to be tested asI＋I n ；
In the formula (I), the compound is shown in the specification,
whereiniA value of 1,2, … N;I 0 is an effective current signal at the wellhead of a target well,I n0 The noise intensity of the well mouth of the target well,I i Is an effective current signal at the well mouth of an adjacent well,I ni The noise intensity at the well mouth of the adjacent well,IIs an effective current signal in a single-ended signal of a target well,I n The noise intensity in the single-ended signal of the target well.
4. The interwell mirrored differential current surface transceiver antenna assembly as claimed in claim 2, wherein the main current sensor and the N secondary current sensors receive effective current signals in opposite directions when the surface transceiver antenna assembly is in a signal receiving condition.
5. The interwell mirrored differential current surface transceiver antenna assembly of claim 1, wherein when the surface transceiver antenna assembly is in a signal transmitting condition:
the differential signals output by the mirror image differential module are converted by the main current sensor and the auxiliary current sensors, and effective current signals are induced at wellhead oil pipes of the target well and N adjacent wells thereofWhich are respectively represented asI 0 、I i Wherein, in the process,I 0 =-I i whereiniThe value is 1,2, … N, N is more than or equal to 1.
6. The interwell mirrored differential current surface transceiver antenna assembly as claimed in any one of claims 1 to 5, wherein the loop is a current loop and passes through downhole equipment of the target well, the primary current sensor, the secondiA secondary current sensor at the wellhead of the adjacent well; the specific flow direction of the current loop is as follows: starting from the positive electrode of the underground equipment of the target well, sequentially passing through the oil pipe of the target well, the well mouth of the target well, the target well and the second welliMetallic connections between adjacent wells, secondiAdjacent well head, secondiAdjacent well tubing, target well and second welliAdjacent interwell formations, eventually reaching the negative pole of the downhole equipment of the target well, whereiniThe value is 1,2, … N, N is more than or equal to 1.
7. A communication method based on the inter-well mirrored differential current mode surface transceiver antenna apparatus of claim 1, comprising:
when the ground transceiving antenna device is in a signal receiving working condition: the underground equipment of the target well modulates the measured underground data into a current signal, the current signal is transmitted to the ground side along an oil pipe, and the main current sensor and the N auxiliary current sensors respectively sense and output noise-containing current signals on the oil pipes of corresponding well mouths;
when the ground transceiving antenna device is in a signal transmitting working condition: the terminal module modulates a control command of a target well into a signal, inputs the signal into the mirror image differential module, and outputs a differential signal through inverse decomposition; the differential signals are respectively input to the main current sensor and the auxiliary current sensor, and effective current signals are induced on an oil pipe and are transmitted downwards along the oil pipe, so that underground equipment of the target well is controlled.
8. The communication method of an interwell mirror differential current mode surface transceiver antenna assembly according to claim 7, further comprising: and the terminal module modulates the control command of the underground equipment of the target well into a very low frequency signal.
9. An electronic device, comprising: one or more processors; a memory device for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the method of communication of an interwell mirrored differential current surface transceiver antenna apparatus as claimed in any one of claims 7 to 8.
10. A computer-readable medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements a method of communication of an interwell mirrored differential current surface transceiver antenna apparatus as claimed in any one of claims 7 to 8.
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