CN111271053B - Water injection well pressure pulse communication device, system and method for dynamic pressure detection - Google Patents
Water injection well pressure pulse communication device, system and method for dynamic pressure detection Download PDFInfo
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- 239000007924 injection Substances 0.000 title claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 230000006854 communication Effects 0.000 title claims abstract description 57
- 238000004891 communication Methods 0.000 title claims abstract description 56
- 238000001514 detection method Methods 0.000 title claims abstract description 39
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- 238000005259 measurement Methods 0.000 claims description 16
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- 239000003921 oil Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
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- 239000007788 liquid Substances 0.000 description 4
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- 238000010521 absorption reaction Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000003129 oil well Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- E21B47/06—Measuring temperature or pressure
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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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
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Abstract
The invention provides a water injection well pressure pulse communication device, a system and a method for dynamic pressure detection, and relates to the technical field of pressure pulse communication.
Description
Technical Field
The invention relates to the technical field of pressure pulse communication, in particular to a water injection well pressure pulse communication device, system and method for dynamic pressure detection.
Background
After the oil field is put into production, along with the increase of the exploitation time, the energy of the oil layer is continuously consumed, the pressure of the oil layer can be continuously reduced, the reduction of the pressure of the oil layer can cause a great amount of degassing of underground crude oil, the viscosity is increased, and the yield of the oil field is greatly reduced. In order to maintain or improve the pressure of an oil layer and realize high and stable yield of an oil field, a water injection well is needed to inject water into the oil layer.
However, it is difficult to satisfy the demand for fine zonal injection in oil fields due to factors such as heterogeneity of oil reservoirs and variation in water absorption capacity of the formations, and since the yield of oil wells has been reduced in the past, it is very important to obtain parameter information such as downhole pressure by performing surface-to-downhole communication in order to avoid the above problems.
However, due to the characteristics of small fluid circulation diameter and small flow in the water injection process, the amplitude of the generated pressure pulse is small, the existing ground and underground information transmission devices are not easy to detect the pressure pulse, the phenomena of measurement data loss and the like are easily caused, the accuracy of communication is influenced, and the use experience of a user is further reduced.
Disclosure of Invention
Accordingly, the present invention is directed to a water injection well pressure pulse communication device, system and method for dynamic pressure detection, so as to alleviate the above technical problems.
In a first aspect, the embodiment of the invention provides a water injection well pressure pulse communication device for dynamic pressure detection, wherein the device comprises a first pulse generator, a measurement and control instrument, a second pulse generator and a data processing module which are sequentially in communication connection, the measurement and control instrument comprises a first piezoelectric dynamic pressure sensor and a single chip microcomputer which are in communication connection, the data processing module comprises a second piezoelectric dynamic pressure sensor and a coupler which are in communication connection, the first pulse generator is further connected with the first piezoelectric dynamic pressure sensor, the second pulse generator is further connected with the single chip microcomputer and the second piezoelectric dynamic pressure sensor, the first pulse generator and the coupler are further connected with an upper computer, the first pulse generator and the data processing module are installed in a channel of a water injection well on the ground, and the measurement and control instrument and the second pulse generator are both installed in a channel of a water injection well on the ground; the first pulse generator is used for receiving a control signal sent by the upper computer and modulating the control signal into a negative pressure wave signal to be sent to the first piezoelectric type dynamic pressure sensor through a channel of the water injection well; the singlechip is used for receiving the negative pressure wave signals sent by the first piezoelectric dynamic pressure sensor and sending data information corresponding to the negative pressure wave signals to the second pulse generator; the second pulse generator is used for adjusting the data information into a positive pressure wave signal and sending the positive pressure wave signal to the second piezoelectric type dynamic pressure sensor; the coupler is used for receiving the positive pressure wave signal sent by the second piezoelectric type dynamic pressure sensor, decoupling the positive pressure wave signal, and sending the decoupled positive pressure wave signal to the upper computer to acquire data information.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the apparatus further includes a data acquisition module connected to the single chip microcomputer, and the data acquisition module is installed below a water injection layer in the water injection well; the data acquisition module is used for receiving a data acquisition instruction generated by the singlechip according to the negative pressure wave signal and acquiring data information according to the data acquisition instruction.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the apparatus further includes a relay connected to the first pulse generator; the relay is used for triggering the first pulse generator to start according to the control signal.
With reference to the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the first pulse generator is a negative pressure pulse generator.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the apparatus further includes a power supply module connected to the first piezoelectric dynamic pressure sensor; the power module is used for providing electric energy for the first piezoelectric type dynamic pressure sensor.
With reference to the fourth possible implementation manner of the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the power supply module is a constant current source.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the second piezoelectric dynamic pressure sensor is a positive pressure pulse sensor.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the coupler is an IEPE coupler.
In a second aspect, an embodiment of the present invention further provides a water injection well pressure pulse communication system for dynamic pressure detection, where the system includes the water injection well pressure pulse communication device for dynamic pressure detection, and further includes an upper computer; wherein, the host computer is connected with a water injection well pressure pulse communication device for dynamic pressure detection.
In a third aspect, an embodiment of the present invention further provides a water injection well pressure pulse communication method for dynamic pressure detection, where the method is applied to the water injection well pressure pulse communication system for dynamic pressure detection; the method comprises the following steps: the first pulse generator receives a control signal sent by the upper computer, modulates the control signal into a negative pressure wave signal and sends the negative pressure wave signal to the first piezoelectric type dynamic pressure sensor through a channel of the water injection well; the singlechip receives a negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor and sends data information corresponding to the negative pressure wave signal to the second pulse generator; the second pulse generator adjusts the data information into a positive pressure wave signal and sends the positive pressure wave signal to the second piezoelectric dynamic pressure sensor; the coupler receives the positive pressure wave signal sent by the second piezoelectric type dynamic pressure sensor, and the positive pressure wave signal is decoupled, and the decoupled positive pressure wave signal is sent to the upper computer to acquire data information. The embodiment of the invention has the following beneficial effects:
according to the water injection well pressure pulse communication device, system and method for dynamic pressure detection, when a first pulse generator receives a control signal sent by an upper computer, the control signal is modulated into a negative pressure wave signal and sent to a first piezoelectric dynamic pressure sensor through a channel of a water injection well, a single chip receives the negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor, data information corresponding to the negative pressure wave signal is sent to a second pulse generator, the second pulse generator adjusts the data information into the positive pressure wave signal and sends the positive pressure wave signal to a second dynamic pressure sensor, a coupler conducts decoupling processing on the positive pressure wave signal and sends the positive pressure wave signal to the upper computer to obtain the data information, the first piezoelectric dynamic pressure sensor and the second piezoelectric dynamic pressure sensor can conduct signal receiving, accuracy of ground and underground signal transmission is effectively achieved, and use experience of a user is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a water injection well pressure pulse communication device for dynamic pressure detection according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another dynamic pressure detection water injection well pressure pulse communication device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a water injection well pressure pulse communication system for dynamic pressure detection according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another dynamic pressure detection water injection well pressure pulse communication system according to an embodiment of the present invention;
fig. 5 is a flowchart of a water injection well pressure pulse communication method for dynamic pressure detection according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. The embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive step, belong to the protection scope of the present invention.
At present, the ground and downhole information transmission mainly comprises two series of wired transmission and wireless transmission: the wired transmission comprises cable transmission, special pipe column transmission and optical fiber transmission; wireless transmission includes electromagnetic transmission, acoustic transmission, and pressure pulse transmission. Wherein, the cable transmission and the optical fiber transmission are damaged due to corrosion after long-time underground work, which affects the reliability of the system; the special pipe column is not easy to realize the continuity of signals at the connecting part, and the development cost is high; the attenuation of electromagnetic transmission signals is large, the signals are easily interfered by electrical equipment, noise is easily mixed, and the signals are difficult to detect; the sound wave transmission is easy to generate reflection, and the signal receiving is influenced.
The pressure pulse transmission is to take liquid in the column as a medium, and respectively generate negative pulse and positive pulse to carry out pressure pulse communication by changing the flow rate or the flow area of the liquid in the column. And the pressure pulse transmission mode has low equipment cost and ideal transmission distance and reliability. However, the existing pressure pulse communication technology is widely applied to the measurement and control while drilling process and is less applied to the water injection process. Meanwhile, pressure pulse communication is greatly different in the measurement and control while drilling process and the water injection process, mud liquid in the measurement and control while drilling process is recycled, the pressure of the mud liquid is high and stable, a generated pressure pulse signal is easy to detect, a medium for generating pressure pulses in the water injection process is water, the water is a controlled amount, and the circulation diameter, the flow rate and the pressure pulse amplitude are much smaller than those of the measurement and control while drilling, so that the requirement on a pressure sensor for collecting the pressure pulses in the water injection process is required to be improved.
Therefore, the water injection well pressure pulse communication device, the system and the method for dynamic pressure detection provided by the embodiment of the invention can alleviate the technical problem.
For the convenience of understanding the present embodiment, a water injection well pressure pulse communication device for dynamic pressure detection disclosed in the present embodiment will be described in detail first.
The first embodiment is as follows:
the embodiment of the invention provides a water injection well pressure pulse communication device for dynamic pressure detection, which comprises a first pulse generator 100, a measurement and control instrument 101, a second pulse generator 102 and a data processing module 103 which are sequentially in communication connection, wherein the measurement and control instrument comprises a first piezoelectric dynamic pressure sensor 104 and a single chip microcomputer 105 which are in communication connection, the data processing module comprises a second piezoelectric dynamic pressure sensor 106 and a coupler 107 which are in communication connection, the first pulse generator 100 is further connected with the first piezoelectric dynamic pressure sensor 104, the second pulse generator 102 is further connected with the single chip microcomputer 105 and the second piezoelectric dynamic pressure sensor 106, the first pulse generator 100 and the coupler 107 are further connected with an upper computer, the first pulse generator and the data processing module are arranged in a channel of a ground water injection well, and the measurement and control instrument and the second pulse generator are both arranged in a channel of the ground water injection well.
During specific implementation, the first pulse generator is used for receiving a control signal sent by the upper computer, modulating the control signal into a negative pressure wave signal and sending the negative pressure wave signal to the first piezoelectric type dynamic pressure sensor through a channel of the water injection well; the singlechip is used for receiving the negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor and sending data information corresponding to the negative pressure wave signal to the second pulse generator; the second pulse generator is used for adjusting the data information into a positive pressure wave signal and sending the positive pressure wave signal to the second piezoelectric dynamic pressure sensor; the coupler is used for receiving the positive pressure wave signal sent by the second piezoelectric type dynamic pressure sensor, decoupling the positive pressure wave signal, and sending the decoupled positive pressure wave signal to the upper computer to acquire data information.
During concrete realization, above-mentioned host computer can be for the industrial computer, the workstation, touch-sensitive screen etc. directly send the computer of controlling the order, and specifically, the process that the host computer sent control signal to observing and controling the instrument does: the upper computer encodes a control signal to be transmitted according to a communication protocol, the encoded control signal is sent to a first pulse generator, the first pulse generator is a negative pressure pulse generator and can modulate the control signal into a negative pressure wave signal and then send the negative pressure wave signal to a first piezoelectric dynamic pressure sensor through a channel of a water injection well, the first piezoelectric dynamic pressure sensor sends the received negative pressure wave signal to a single chip microcomputer, the single chip microcomputer decodes the received negative pressure wave signal to obtain the control signal, data information corresponding to the control signal is encoded and then sent to a second pulse generator, the second pulse generator is a positive pressure pulse sensor and can modulate data information into a positive pressure wave signal and then send the positive pressure wave signal to a second piezoelectric dynamic pressure sensor through the channel of the water injection well, and the second piezoelectric dynamic pressure sensor sends the received positive pressure wave signal to a coupler for decoupling processing and sends the decoupled positive pressure wave signal to the upper computer to obtain data information for a user to know underground conditions.
According to the water injection well pressure pulse communication device for dynamic pressure detection, when a first pulse generator receives a control signal sent by an upper computer, the control signal is modulated into a negative pressure wave signal and sent to a first piezoelectric dynamic pressure sensor through a water injection well channel, a single chip receives the negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor, data information corresponding to the negative pressure wave signal is sent to a second pulse generator, the second pulse generator adjusts the data information into the positive pressure wave signal and sends the positive pressure wave signal to a second piezoelectric dynamic pressure sensor, a coupler decouples the positive pressure wave signal and sends the positive pressure wave signal to the upper computer to obtain the data information, the signals can be received through the first piezoelectric dynamic pressure sensor and the second piezoelectric dynamic pressure sensor, accuracy of ground and underground signal transmission is effectively achieved, and use experience of a user is improved.
In practical use, it can be known from the principle of generating pressure waves by using the orifice plate throttling theory that no matter negative pressure wave signals are generated aboveground or positive pressure wave signals are generated underground, because the amplitude of the pressure wave signals is small, especially when the flow rate is small, the absolute error of the measurement of the small pressure pulses by the conventional piezoresistive pressure sensor is large, even the pressure pulses are small enough to be smaller than the allowable absolute error and cannot be detected, which increases great difficulty in the detection and identification of waveforms.
Further, fig. 2 shows a schematic structural diagram of another dynamic pressure detection water injection well pressure pulse communication device, as shown in fig. 2, the device further includes a data acquisition module 200 connected to the single chip microcomputer, the data acquisition module is installed below a water injection layer in the water injection well; the data acquisition module is used for receiving a data acquisition instruction generated by the singlechip according to the negative pressure wave signal and acquiring data information according to the data acquisition instruction.
In practical use, the data acquisition module may include a plurality of different types of sensors according to the user data acquisition requirements, for example, a pressure sensor, a temperature sensor, a humidity sensor, a flow rate sensor, or the like, in this embodiment, the data acquisition module is not limited, and meanwhile, a plurality of sensors included in the data acquisition module may be respectively installed in each water injection layer to acquire physical information of each water injection layer; when the single chip microcomputer receives the negative pressure wave signal, the control signal is obtained through analysis, the single chip microcomputer generates a corresponding data acquisition instruction according to the control signal and sends the data acquisition instruction to the data acquisition module, the data acquisition module acquires data information corresponding to the data acquisition instruction, the acquired data information is sent to the single chip microcomputer, the data information is coded and then sent to the second pulse generator.
As shown in fig. 2, the apparatus further comprises a relay 201 connected to the first pulse generator; the relay is used for triggering the first pulse generator to start according to the control signal.
Specifically, the relay has a control system and a controlled system, and is usually applied to an automatic control circuit, and it is actually an "automatic switch" that uses a small current to control a large current, so that it plays the roles of automatic regulation, safety protection, switching circuit, etc. in this embodiment, the relay triggers the first pulse generator to start after receiving a control signal sent by the upper computer.
Preferably, in order to ensure that the first pressure sensor can work normally, as shown in fig. 2, the apparatus further comprises a power module 202 connected to the first piezo-dynamic pressure sensor; the power module is used for providing electric energy for the first piezoelectric type dynamic pressure sensor. In the embodiment, the power supply module provides an excitation current of 2 mA-20 mA for the first pressure sensor.
In a specific implementation, the coupler is an IEPE (integrated Electronic Piezoelectric integrated circuit) coupler, and the IEPE coupler not only can decouple a positive pressure wave signal, but also can provide a 22V-30V dc excitation voltage source or 2 mA-20 mA excitation current for the second Piezoelectric dynamic pressure sensor, so as to ensure that the second Piezoelectric dynamic pressure sensor can work normally.
Example two:
on the basis of the above embodiment, the embodiment of the present invention further provides a water injection well pressure pulse communication system for dynamic pressure detection, as shown in fig. 3, which is a schematic structural diagram of the water injection well pressure pulse communication system for dynamic pressure detection, as shown in fig. 3, the water injection well pressure pulse communication system 300 for dynamic pressure detection includes the water injection well pressure pulse communication device 301 for dynamic pressure detection, and further includes an upper computer 302; wherein, the host computer is connected with a water injection well pressure pulse communication device for dynamic pressure detection.
For the convenience of understanding, fig. 4 shows a schematic structural diagram of another water injection well pressure pulse communication system for dynamic pressure detection, as shown in fig. 4, a first pulse generator 100 and a second piezoelectric dynamic pressure sensor 106 are both installed in a channel 400 of a water injection well on the ground, and a measurement and control instrument 101 and a second pulse generator 102 are both installed in a channel of a water injection well on the ground; the specific communication process is as follows: the upper computer 302 sends the control signal to the relay 201, so that the relay triggers the first pulse generator to modulate the control signal into a negative pressure wave signal, the negative pressure wave signal is sent to the first piezoelectric dynamic pressure sensor 104 through a channel of the water injection well, the data information corresponding to the negative pressure wave signal is coded and sent to the second pulse generator 102 after being decoded by the single chip microcomputer 105, the data information is adjusted into a positive pressure wave signal by the second pulse generator and then sent to the second piezoelectric dynamic pressure sensor 106 through the channel of the water injection well, and after the positive pressure wave signal is received by the second piezoelectric dynamic pressure sensor 106, the positive pressure wave signal is sent to the coupler 107, is decoupled and then sent to the upper computer 302 to be decoded to obtain the data information.
The water injection well pressure pulse communication system for dynamic pressure detection provided by the embodiment of the invention has the same technical characteristics as the water injection well pressure pulse communication device for dynamic pressure detection provided by the embodiment, so that the same technical problems can be solved, and the same technical effect can be achieved.
Further, the embodiment of the invention also provides a water injection well pressure pulse communication method for dynamic pressure detection, wherein the method is applied to the water injection well pressure pulse communication system for dynamic pressure detection; a flow chart of a method of dynamic pressure sensing water injection well pressure pulse communication as shown in fig. 5, the method comprising the steps of:
step S502, a first pulse generator receives a control signal sent by an upper computer, modulates the control signal into a negative pressure wave signal and sends the negative pressure wave signal to a first piezoelectric type dynamic pressure sensor through a channel of a water injection well;
step S504, the single chip microcomputer receives the negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor and sends data information corresponding to the negative pressure wave signal to the second pulse generator;
step S506, the second pulse generator adjusts the data information into a positive pressure wave signal and sends the positive pressure wave signal to the second piezoelectric dynamic pressure sensor;
and step S508, the coupler receives the positive pressure wave signal sent by the second piezoelectric dynamic pressure sensor, decouples the positive pressure wave signal, and sends the decoupled positive pressure wave signal to an upper computer to acquire data information.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working process of the system and the method described above may refer to the corresponding process in the foregoing device embodiment, and details are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships illustrated in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The water injection well pressure pulse communication device for dynamic pressure detection is characterized by comprising a first pulse generator, a measurement and control instrument, a second pulse generator and a data processing module which are sequentially in communication connection, wherein the measurement and control instrument comprises a first piezoelectric dynamic pressure sensor and a single chip microcomputer which are in communication connection, the data processing module comprises a second piezoelectric dynamic pressure sensor and a coupler which are in communication connection, the first pulse generator is further connected with the first piezoelectric dynamic pressure sensor, the second pulse generator is further connected with the single chip microcomputer and the second piezoelectric dynamic pressure sensor, the first pulse generator and the coupler are further connected with an upper computer, the first pulse generator and the data processing module are installed in a channel of a water injection well on the ground, and the measurement and control instrument and the second pulse generator are both installed in a channel for ground injection;
the first pulse generator is used for receiving a control signal sent by the upper computer and modulating the control signal into a negative pressure wave signal to be sent to the first piezoelectric dynamic pressure sensor through a channel of the water injection well;
the singlechip is used for receiving the negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor and sending data information corresponding to the negative pressure wave signal to the second pulse generator;
the second pulse generator is used for adjusting the data information into a positive pressure wave signal and sending the positive pressure wave signal to the second piezoelectric dynamic pressure sensor;
the coupler is used for receiving the positive pressure wave signals sent by the second piezoelectric type dynamic pressure sensor, decoupling the positive pressure wave signals, and sending the decoupled positive pressure wave signals to the upper computer to acquire the data information.
2. The device of claim 1, further comprising a data acquisition module connected to the single-chip microcomputer, the data acquisition module being installed below a water injection layer in a water injection well;
the data acquisition module is used for receiving a data acquisition instruction generated by the single chip microcomputer according to the negative pressure wave signal and acquiring the data information according to the data acquisition instruction.
3. The apparatus of claim 1, further comprising a relay connected to the first pulse generator;
the relay is used for triggering the first pulse generator to start according to the control signal.
4. The device of claim 3, wherein the first pulse generator is a negative pressure pulse generator.
5. The apparatus of claim 1, further comprising a power module connected to the first piezo dynamic pressure sensor;
the power module is used for providing electric energy for the first piezoelectric type dynamic pressure sensor.
6. The apparatus of claim 5, wherein the power module is a constant current source.
7. The apparatus of claim 1, wherein the second piezo dynamic pressure sensor is a positive pressure pulse sensor.
8. The apparatus of claim 1, wherein the coupler is an IEPE coupler.
9. A water injection well pressure pulse communication system for dynamic pressure detection, which is characterized by comprising the water injection well pressure pulse communication device for dynamic pressure detection according to any one of claims 1 to 8 and further comprising an upper computer; and the upper computer is connected with a water injection well pressure pulse communication device for dynamic pressure detection.
10. A water injection well pressure pulse communication method for dynamic pressure detection, which is applied to the water injection well pressure pulse communication system for dynamic pressure detection according to claim 9; the method comprises the following steps:
the first pulse generator receives a control signal sent by the upper computer, modulates the control signal into a negative pressure wave signal and sends the negative pressure wave signal to the first piezoelectric type dynamic pressure sensor through a channel of the water injection well;
the singlechip receives the negative pressure wave signal sent by the first piezoelectric dynamic pressure sensor and sends data information corresponding to the negative pressure wave signal to the second pulse generator;
the second pulse generator adjusts the data information into a positive pressure wave signal and sends the positive pressure wave signal to a second piezoelectric dynamic pressure sensor;
the coupler receives the positive pressure wave signal sent by the second piezoelectric type dynamic pressure sensor, and the positive pressure wave signal is decoupled, and the decoupled positive pressure wave signal is sent to the upper computer to obtain the data information.
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