Common acquisition circuit for injection and sounding

Abstract

The application provides an injection-production simultaneous measurement universal acquisition circuit, and belongs to the technical field of oil well development. The circuit comprises: an analog signal processing board and a control acquisition board; the analog signal processing board comprises: a temperature signal processing module, which is used for converting a temperature signal in a well into an analog voltage signal; a pressure signal processing module, which is used for converting a pressure signal in the well into a first analog differential signal; and a pressure difference signal processing module, which is used for converting a pressure difference signal in the well into a second analog differential signal; the control acquisition board comprises: a main control module; a multi-channel pulse acquisition module, which is used for detecting pulse signals of different layers in the well; and a UART interface module, which is used for receiving a command issued by a communication board and sending at least one of data of a water nozzle driving assembly, data of an electric conductivity water holding flow assembly and data of an ultrasonic flow assembly to the communication board. The application is used to solve the problems of insufficient completeness of downhole detection parameters and incompatibility of injection and production well dynamic monitoring.

Description

Technical Field

[0001] This invention relates to the field of oil well development technology, and more specifically to a universal acquisition circuit for simultaneous injection and production monitoring. Background Technology

[0002] In recent years, production well development has entered the mid-to-late stages, with many wells facing significant challenges such as high extraction difficulty and low oil content. To stabilize oil production, oilfields have adopted simultaneous injection and production monitoring technology. This technology typically involves one production well and multiple water injection wells working together to perform water injection and oil production simultaneously within a well group. It utilizes the density difference between water and oil to extract remaining oil from older wells. Current simultaneous injection and production monitoring technology requires the water injection and production instruments to be placed in the well for extended periods, necessitating long-term standby and placing higher demands on instrument performance. Water injection and production wells are divided into multiple layers using separators based on their depth, typically three layers, resulting in four layers. The separators for water injection and production wells are at the same depth, providing a pathway for oil displacement during water injection.

[0003] Existing downhole oil production instruments that use simultaneous injection and production monitoring technology suffer from insufficient completeness of downhole detection parameters and are incompatible with dynamic monitoring of water injection and oil production wells. Summary of the Invention

[0004] The purpose of this invention is to provide a universal acquisition circuit for simultaneous injection and production monitoring, in order to solve the problems of insufficient completeness of downhole detection parameters and incompatibility with dynamic monitoring of water injection and oil production wells in existing downhole oil production instruments that use simultaneous injection and production monitoring technology.

[0005] To achieve the above objectives, embodiments of the present invention provide a universal acquisition circuit for simultaneous injection and acquisition, comprising: an analog signal processing board and a control acquisition board electrically connected;

[0006] The analog signal processing board includes:

[0007] The temperature signal processing module is used to convert the temperature signal detected by the in-well temperature sensor into an analog signal.

[0008] Voltage signal;

[0009] The pressure signal processing module is used to convert the pressure signal detected by the in-well pressure sensor into a first analog differential signal;

[0010] The differential pressure signal processing module is used to convert the differential pressure signal detected by the differential pressure sensor in the well into a second analog differential signal;

[0011] The control acquisition board includes:

[0012] The main control module receives the analog voltage signal, the first analog differential signal, and the second analog differential signal.

[0013] A multi-channel pulse acquisition module, electrically connected to the main control module, is used to detect pulse signals from different layers within the well.

[0014] The UART interface module is electrically connected to the main control module and is used to receive commands from the communication board. It also sends at least one of the collected data from the faucet drive assembly, the electrical conductivity water flow assembly, and the ultrasonic flow assembly to the communication board through the main control module.

[0015] Optionally, the multi-channel pulse acquisition module is used to detect any one of the following: multi-channel capacitive water holding capacity pulse signals, multiple quartz pressure pulse signals, and multiple rate pulse signals composed of combinations of capacitive water holding capacity pulse signals and quartz pressure pulse signals in different layers within the well.

[0016] Optionally, the priority of the main control module uploading any one of the data from the water faucet drive assembly, the electrical conductivity water flow rate assembly, and the ultrasonic flow rate assembly collected by the UART interface module to the communication board is higher than the priority of the main control module uploading any one of the analog voltage signal, the first analog differential signal, the second analog differential signal, and the pulse signals of different layers to the communication board.

[0017] Optionally, the circuit further includes: an ADC data acquisition module, electrically connected to the main control module, used to perform analog-to-digital conversion on the analog voltage signal, the first analog differential signal and the second analog differential signal respectively.

[0018] Optionally, the area of ​​the analog signal processing board is 2000 mm². 2 Up to 3000mm 2 The control

[0019] The area of ​​the data acquisition board is 2000 mm². 2 Up to 3000mm 2 .

[0020] Optionally, the power supply voltage for both the analog signal processing board and the control acquisition board is 3.3V to 5V.

[0021] Optionally, the output voltage of the analog signal processing board is less than or equal to 3.3V.

[0022] Optionally, the multi-channel interface voltage of the UART interface module is 3.3V.

[0023] Optionally, the multi-channel interface voltage of the multi-channel pulse acquisition module is 3.3V.

[0024] Optionally, the microcontroller unit in the main control module exchanges data with the field-programmable gate array via an SPI bus.

[0025] Through the above technical solution, this embodiment of the invention, by setting up a temperature signal processing module, a pressure signal processing module, a differential pressure signal processing module, a multi-channel pulse acquisition module, and a UART interface module, realizes the function of monitoring well temperature, pressure, differential pressure, flow rate, and water holdup. It also has the function of controlling the opening and closing of the water nozzle, ensuring precise and controllable water injection. Furthermore, this embodiment of the invention is compatible with the dynamic monitoring of both water injection and oil production wells, uploading monitoring data according to commands issued by the communication board. This solves the problems of insufficient completeness of downhole detection parameters and incompatibility with the dynamic monitoring of both water injection and oil production wells in existing downhole oil production instruments using simultaneous injection and production monitoring technology.

[0026] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the universal acquisition circuit for simultaneous injection and sampling provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the temperature signal processing module provided by the present invention;

[0030] Figure 3 This is a schematic diagram of the pressure signal processing module provided by the present invention;

[0031] Figure 4 This is a schematic diagram of the pressure signal processing module provided by the present invention;

[0032] Figure 5 This is a schematic diagram of the differential pressure signal processing module provided by the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the ADC data acquisition module provided by the present invention;

[0034] Figure 7 This is one of the structural schematic diagrams of the main control module provided by the present invention;

[0035] Figure 8 This is the second structural schematic diagram of the main control module provided by the present invention;

[0036] Figure 9This is a schematic diagram of the structure of the analog signal processing board and the control acquisition board provided by the present invention. Detailed Implementation

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0038] Please refer to Figure 1 This invention provides a universal acquisition circuit for simultaneous injection and acquisition testing, comprising an analog signal processing board 10 and a control acquisition board 20 electrically connected. The universal acquisition circuit consists of five parts: circuit function, circuit size, acquisition mode, analog signal processing board 10, and control acquisition board 20. The analog signal processing board 10 and control acquisition board 20 will be described first below.

[0039] The analog signal processing board 10 includes a temperature signal processing module 11, a pressure signal processing module 12, and a differential pressure signal processing module 13. In this embodiment, the analog signal processing board 10 includes one temperature signal, two pressure signals, and one differential pressure signal. After analog signal filtering and amplification, the temperature signal is a DC signal, and the two pressure signals and the differential pressure signal are differential signals. In other embodiments, the analog signal processing board 10 further includes a capacitive water holding capacity signal processing module (not shown) and a backup conductivity water holding capacity flow rate signal processing module (not shown), where the capacitive water holding capacity signal and the conductivity water holding capacity flow rate signal are pulse signals.

[0040] The temperature signal processing module 11 is used to convert the temperature signal detected by the well temperature sensor into an analog voltage signal. Specifically, the circuit diagram of the temperature signal processing module 11 can be found in [reference needed]. Figure 2 As shown. The temperature signal processing module 11 is used to process the resistance change of the temperature sensor in the well when the temperature changes, converting it into an analog voltage signal to reflect the temperature change information in the well. The output signal of the temperature signal processing module 11 is as follows. Figure 2 The Temp_Voltage output is used as AN+, and GND is used as AN- as the input signal. These signals are then connected to the ADC data acquisition module 24 in the control acquisition board 20 for analog-to-digital conversion.

[0041] The pressure signal processing module 12 is used to convert the pressure signal detected by the well pressure sensor into a first analog differential signal. In one embodiment, the pressure signal processing module 12 includes a pressure 1 signal processing module 121 and a pressure 2 signal processing module 122. The first analog differential signal represents the analog differential signal converted by the pressure 1 signal processing module 121 and the pressure 2 signal processing module 122.

[0042] The circuit corresponding to pressure signal processing module 121 Figure 3 It is used to convert the pressure change signal of the well pressure sensor in the environment into a first analog differential signal. Figure 3 The +5V terminals of C22 are the power supply voltage for pressure sensor 1, and are connected to the power supply line of pressure sensor 1. GND is connected to the grounding line of pressure sensor 1. The 1_AINP+ terminal connected to C17 is connected to the positive input terminal of pressure sensor 1, and the 1_AINP- terminal connected to C32 is connected to the negative input terminal of pressure sensor 1. The 1_AINP+ terminal connected to C25 is the positive output signal of the analog differential signal output by pressure signal processing circuit 1, and the 1_AINP- terminal is the negative output signal of analog differential signal output by pressure signal processing circuit 1. 1_AINP+ is used as AN+, and 1_AINP- is used as AN- input signal, which are connected to the ADC data acquisition module 24 in control acquisition board 20 for analog-to-digital conversion.

[0043] The circuit corresponding to pressure signal processing module 122 Figure 4 It is used to convert the pressure change signal of the pressure sensor in the environment into a first analog differential signal. Figure 4 The +5V terminals of C19 are the power supply voltage for the pressure sensor 2, and are connected to the power supply line of the pressure sensor 2. GND is connected to the grounding line of the pressure sensor 2. The 2_AINP+ terminal connected to C16 is connected to the positive input terminal of the pressure sensor 2, and the 2_AINP- terminal connected to C31 is connected to the negative input terminal of the pressure sensor 2. The 2_AINP+ terminals of C23 are the positive output signal of the analog differential signal output by the pressure sensor 2 signal processing circuit, and the 2_AINP- terminal is the negative output signal of the analog differential signal output by the pressure sensor 2 signal processing circuit. 2_AINP+ is used as AN+, and 2_AINP- is used as AN- input signal, which are connected to the ADC data acquisition module 24 in the control acquisition board 20 for analog-to-digital conversion.

[0044] The differential pressure signal processing module 13 is used to convert the differential pressure signal detected by the in-well differential pressure sensor into a second analog differential signal. Specifically, the circuit of the differential pressure signal processing module 13 corresponds to... Figure 5 It is used to convert the pressure change signal of the differential pressure sensor in the environment into a second analog differential signal. Figure 5The +5V terminals of C18 are the power supply voltage for the differential pressure sensor, connected to the power supply line of the differential pressure sensor. GND is connected to the grounding line of the differential pressure sensor. The 3_AINP+ terminal connected to C15 is connected to the positive input terminal of the differential pressure sensor, and the 3_AINP- terminal connected to C30 is connected to the negative input terminal of the differential pressure sensor. The 1_AINP+ terminal of C20 is the positive output signal of the analog differential signal output by the differential pressure signal processing circuit, and the 3_AINP- terminal is the negative output signal of the analog differential signal output by the differential pressure signal processing circuit. 3_AINP+ is used as AN+, and 3_AINP- is used as AN- input signal, connected to the ADC data acquisition module 24 in the control acquisition board 20 for analog-to-digital conversion.

[0045] The analog signal processing board 10 of this invention includes a temperature signal processing module 11, a pressure 1 signal processing module 121, a pressure 2 signal processing module 122, and a differential pressure signal processing module 13, which realizes the function of monitoring the temperature, pressure, and differential pressure in the well, and improves the completeness of downhole detection parameters of downhole oil production instruments using injection and production simultaneous measurement technology.

[0046] The control acquisition board 20 includes: a main control module 21, a multi-channel pulse acquisition module 22, an ADC data acquisition module 24, and a UART interface module 23. In this embodiment of the invention, the main control module 21 of the control acquisition board 20 adopts an FPGA (Field Programmable Gate Array) + MCU (Microcontroller Unit) mode, separating control acquisition from data processing, and making reasonable use of chip functions to improve program running efficiency. The circuit's unique sleep function can reduce the overall power consumption of the board, achieving the function of simultaneous injection and acquisition measurement. The control acquisition board 20 has four UART interfaces, which can be selected to connect to different assemblies according to the water holding capacity and flow rate of different regions. In addition to the above functions, the control acquisition board 20 circuit can also recognize commands from the communication board, thereby completing data acquisition and uploading.

[0047] The ADC data acquisition module 24, electrically connected to the main control module 21, is used to perform analog-to-digital conversion on the analog voltage signal, the first analog differential signal, and the second analog differential signal, respectively. Specifically, the circuit of the ADC data acquisition module 24 is as follows: Figure 6 As shown, the analog signals of temperature, pressure 1, pressure 2, and differential pressure output by the analog signal board are collected, converted into digital signals, and finally input into the main control module 21 for data processing and uploading. Figure 6 Only one ADC data acquisition module 24 is shown in the figure. The ADC data acquisition module 24 is the same for temperature signal processing module 11, pressure 1 signal processing module 121, pressure 2 signal processing module 122 and differential pressure signal processing module 13. Figure 6 ADC_SCK is the clock signal for the ADC, corresponding to ADC_SCK in the main control module 21, used for ADC data input or output clock. ADC_CS is the chip select signal for the ADC, corresponding to ADC_CS in the main control module 21, and is the control signal for valid ADC data transmission. ADC_DIN is the data input signal for the ADC, corresponding to ADC_CS in the main control module 21, used by the main control module 21 to write data to the ADC. ADC_DOUT is the data output signal for the ADC, corresponding to ADC_DOUT in the main control module 21, used by the main control module 21 to receive ADC digital signals for data transmission and processing. ADC_DRDY is the ADC conversion completion flag signal, corresponding to ADC_DRDY in the main control module 21, and is input to the main control module 21 as a conversion completion flag, a key signal to prompt the main control module 21 to retrieve the ADC digital signal.

[0048] Please refer to Figure 7 The multi-channel pulse acquisition module 22 is electrically connected to the main control module 21 and is used to detect pulse signals from different layers within the well. For example, water injection wells and oil production wells are divided into multiple layers based on their depth using separators; typically, three separators are used to divide the well into four layers. Therefore, the multi-channel pulse acquisition module 22 can be a four-channel pulse acquisition module. The four-channel pulse acquisition module acquires any four pulse signals, corresponding to pulse signal 1, pulse signal 2, pulse signal 3, and pulse signal 4, and inputs these four pulse signals into CH_IN_1, CH_IN_2, CH_IN_3, and CH_IN_4 in the main control module 21. R13, R14, R15, and R16 are impedance matching resistors. The specific pulse signals connected can be customized according to different well conditions. The multi-channel pulse acquisition module 22 is used to detect any one of the following: multiple capacitive water holdup pulse signals, multiple quartz pressure pulse signals, and multiple rate pulse signals combining capacitive water holdup pulse signals and quartz pressure pulse signals from different layers within the well. For example, in the embodiments of the present invention, the four pulse signals provided can be four different pulse signals such as four capacitive water holding rate pulse signals or four quartz pressure pulse signals, or a combination of four capacitive water holding rate pulse signals or four quartz pressure pulse signals, or not limited to the above signal types, as long as the signal requirements are met, they can be flexibly combined and have strong versatility.

[0049] When the hardware of this embodiment of the invention is working, the sensors (temperature signal processing module 11, pressure 1 signal processing module 121, pressure 2 signal processing module 122, and differential pressure signal processing module 13) input the raw data to the analog signal processing board 10. After signal filtering and amplification, the system waits periodically for the FPGA in the acquisition board 20 to control the ADC data acquisition module 24 and the multi-channel pulse acquisition module 22 in a time-division manner, and completes the acquisition of four analog signals and four pulse signals in a time-division manner. After the acquired data is buffered in the FPGA, it is transmitted to the MCU via the SPI bus for signal conversion, and then waits for the communication board command to send the data out.

[0050] Please refer to Figure 8 The UART interface module 23 is electrically connected to the main control module 21 and is used to receive commands from the communication board and send at least one of the collected data from the faucet drive assembly, the electrical conductivity water flow assembly, and the ultrasonic flow assembly to the communication board through the main control module 21. UART interface module 23 communicates with the communication board, water nozzle drive assembly, conductive water-holding flow assembly, and ultrasonic flow assembly for downlink command reception and uplink data transmission, respectively. UART interface module 23 corresponds to the four UARTs in main control module 21, which are the UART interfaces built into the MCU. uart1_tx and uart1_rx communicate with the communication board, with R17 and R18 being impedance matching resistors; uart2_tx and uart2_rx communicate with the water nozzle drive assembly, with R19 and R20 being impedance matching resistors; uart3_tx and uart3_rx communicate with the conductive water-holding flow assembly, with R23 and R24 being impedance matching resistors; and uart4_tx and uart4_rx communicate with the ultrasonic flow assembly, with R25 and R26 being impedance matching resistors.

[0051] It should be noted that the data acquisition mode in this embodiment of the invention involves simultaneous cyclic acquisition and passive acquisition. The cyclic acquisition mode is suitable for a general-purpose acquisition platform to acquire data from the temperature signal processing module 11, pressure 1 signal processing module 121, pressure 2 signal processing module 122, differential pressure signal processing module 13, capacitive water holding capacity signal processing module, and the backup conductivity water holding capacity flow rate signal processing module. Passive acquisition...

[0052] This system is suitable for recognizing commands from the communication board and uploading corresponding data during cyclic acquisition to the communication board based on different commands. If the downlink command controls the water nozzle opening / closing degree, the downlink command is transmitted to the water nozzle drive assembly, which controls the water nozzle opening degree according to the opening / closing degree percentage in the downlink command. The data uploaded to the communication board at this time reflects the status of the water nozzle assembly. The two modes work together to ensure a reasonable allocation of data acquisition time, avoid instrument crashes due to program conflicts, and guarantee data real-time performance.

[0053] The circuit functionality of this invention requires compatibility with the acquisition and control functions of downhole water injection instruments and downhole oil production instruments. It also provides multiple universal interfaces for connection to the water nozzle drive assembly, conductivity-to-water-holding capacity assembly, and ultrasonic flow assembly. In practical use, different assemblies can be flexibly connected according to well conditions. In addition, it needs to complete the command parsing and data uploading functions of the communication board. In this invention, each module assembly is independent and can be replaced with assemblies having other functions if necessary, only requiring compliance with UART voltage and communication speed, facilitating instrument upgrades.

[0054] For injection-production integrated monitoring technology, both the water injection and oil production modules require monitoring of water holdup and flow rate. Water holdup in injection wells indicates the presence of oil, while in production wells it reflects the oil content. Flow rate primarily reflects the fluid flow under current monitoring conditions, providing a reference for assessing the remaining oil content in the well. It can be calculated stratified at different depths to achieve precise water injection and oil production. Temperature and pressure information are used to monitor well temperature and pressure to prevent instrument deformation and malfunction. Current water holdup and flow rate monitoring instruments have limitations, mainly due to limitations in the detection methods, and are categorized as low water cut / high water cut and low / high flow rate. Therefore, this invention incorporates multiple assemblies to ensure accurate monitoring under different conditions.

[0055] The main control module 21 is used to receive the analog voltage signal, the first analog differential signal, and the second analog differential signal. Specifically, the main control module 21 consists of... Figure 7 and Figure 8 It consists of various modules, connects them, and performs control and data acquisition, downlink command recognition, and uplink data processing. Please refer to [link / reference]. Figure 7 The MCU (Microcontroller Unit) circuit diagram of the main control module 21 of the control acquisition board 20 includes four UART interfaces, an SPI interface, a reset circuit, a clock input, and a program download port. The four UART interfaces have been described above and will not be repeated here. The SPI interface consists of QUADSPI_CLK, QUADSPI_BK1_NCS, QUADSPI_BK1_IO1, QUADSPI_BK1_IO0, QUADSPI_BK1_IO2, and QUADSPI_BK1_IO3, and connects to... Figure 8 In the FPGA circuit of the main control module 21, the FPGA exchanges data sets. The microcontroller unit in the main control module exchanges data with the field-programmable gate array via the SPI bus. The reset circuit NRST is driven by a 3.3V voltage, and is grounded using resistor R21 and capacitor C36, completing the circuit reset instantly upon power-up. MCU_MAIN_CLK is the clock input, sharing a clock with the FPGA; the signal is transmitted from the FPGA to the MCU. SWDIO and SWCLK are the program download interfaces. Please refer to... Figure 8The FPGA (Field Programmable Gate Array) circuit diagram of the main control module 21 of the control acquisition board 20 includes SPI data transmission, four-channel pulse acquisition, and ADC control. The SPI data transmission corresponds to the signal lines... Figure 7 The QUADSPI_CLK, QUADSPI_BK1_NCS, QUADSPI_BK1_IO1, QUADSPI_BK1_IO0, QUADSPI_BK1_IO2, and QUADSPI_BK1_IO3 signals have the same naming and function. Please refer to... Figure 7 CH_IN_1, CH_IN_2, CH_IN_3, and CH_IN_4 are the four pulse acquisition input ports, respectively. R16, R15, R14, and R13 are impedance matching resistors. ADC_SCK is the ADC control clock signal line, ADC_CS is the ADC control chip select signal line, ADC_DRDY is the ADC conversion complete signal line, ADC_DOUT is the ADC output data signal line, and ADC_DIN is the ADC input data signal line.

[0056] Through the above technical solution, this embodiment of the invention, by setting up a temperature signal processing module 11, a pressure signal processing module 12, a differential pressure signal processing module 13, a multi-channel pulse acquisition module 22, and a UART interface module 23, realizes the function of monitoring well temperature, pressure, differential pressure, flow rate, and water holdup. It also has the function of controlling the opening and closing of the water nozzle, ensuring accurate and controllable water injection. Furthermore, this embodiment of the invention is compatible with the dynamic monitoring of both water injection and oil production wells, uploading monitoring data according to commands issued by the communication board. This solves the problems of insufficient completeness of downhole detection parameters and incompatibility with the dynamic monitoring of both water injection and oil production wells in existing downhole oil production instruments using simultaneous injection and production monitoring technology.

[0057] In other aspects of this invention, the main control module 21 uploads any one of the data from the faucet drive assembly, the conductivity water-holding flow assembly, and the ultrasonic flow assembly collected by the UART interface module 23 to the communication board with a higher priority than the main control module 21 uploading the analog voltage signal, the first analog differential signal, and the second analog differential signal.

[0058] The priority of uploading any type of data from the different layers of pulse signals to the communication board is specified. Specifically, the communication board and the UART interfaces of the three-way assembly are all connected to the main control module 21. Among them, the UART interface module 23 connected to the communication board has the highest priority, mainly for responding to commands issued by the communication board and uploading data. The three interfaces in the UART interface module 23 have the same priority, and data is retrieved from different assemblies according to different commands before being transmitted to the communication board. The commands are mutually exclusive and will not occur simultaneously. Only one command is issued at a time, and only one set of data is uploaded at a time.

[0059] In other aspects of this invention, the area of ​​the analog signal processing board 10 is 2000 mm². 2 Up to 3000mm 2 The area of ​​the control acquisition board 20 is 2000 mm². 2 Up to 3000mm 2 The universal acquisition circuit for simultaneous injection and production measurements in this invention mainly consists of two parts: an analog signal processing board 10 and a control acquisition board 20. In one embodiment, to meet the miniaturization requirements in small-bore instruments, the analog signal processing board 10 and the control acquisition board 20 can be designed to have identical dimensions. For example, they can be designed to be 100mm long, 25mm wide, with an outer diameter of 2.8mm and an inner diameter of 2.5mm for the mounting hole. Figure 9 As shown, the analog signal processing board 10 and the control acquisition board 20 are mounted back-to-back on the frame. Utilizing their identical dimensions saves space within the instrument, resulting in a smaller overall size and higher integration. Furthermore, the curved design at both ends of the circuit boards of the analog signal processing board 10 and the control acquisition board 20 facilitates the routing of circuits between the boards, preventing misaligned wiring that could affect instrument installation.

[0060] In other aspects of this invention, to address the problem of high power consumption in existing injection-production simultaneous measurement circuits, which leads to instability in long-term downhole control and acquisition data, this invention sets the power supply voltage of both the analog signal processing board 10 and the control acquisition board 20 to 3.3V to 5V. The output voltage of the analog signal processing board 10 is less than or equal to 3.3V. The multi-channel interface voltage of the UART interface module 23 is 3.3V. The multi-channel interface voltage of the multi-pulse acquisition module 22 is 3.3V.

[0061] In summary, this invention addresses the shortcomings of current injection and sampling simultaneous measurement circuits by innovating the size and design of a universal injection and sampling simultaneous measurement acquisition circuit. It fully utilizes the advantages of integrated circuits to propose an overall solution for a universal injection and sampling simultaneous measurement acquisition circuit with optimized circuit size. This invention enables a dynamic monitoring circuit that integrates layered control acquisition, small size, low power consumption, communication, and injection and sampling compatibility.

[0062] This invention provides a universal acquisition circuit for simultaneous injection and production monitoring, capable of meeting the dynamic monitoring needs of water injection and oil production instruments within oil-water well groups in simultaneous injection and production monitoring systems. Compared to existing water injection and oil production instruments, this invention features a smaller circuit size, lower power consumption, flexible assembly connectivity, and higher circuit reliability. It not only enables control acquisition but also allows communication with remote transmission communication boards to receive commands and upload data. This invention can meet the requirements for long-term data monitoring within confined spaces, demonstrating promising development prospects and significant engineering applications.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A universal acquisition circuit for simultaneous injection and sampling, characterized in that, include: The analog signal processing board and control acquisition board are electrically connected; The analog signal processing board includes: The temperature signal processing module is used to convert the temperature signal detected by the in-well temperature sensor into an analog voltage signal; The pressure signal processing module is used to convert the pressure signal detected by the in-well pressure sensor into a first analog differential signal; The differential pressure signal processing module is used to convert the differential pressure signal detected by the differential pressure sensor in the well into a second analog differential signal; The control acquisition board includes: The main control module receives the analog voltage signal, the first analog differential signal, and the second analog differential signal. A multi-channel pulse acquisition module, electrically connected to the main control module, is used to detect pulse signals from different layers within the well. The UART interface module is electrically connected to the main control module and is used to receive commands from the communication board. It also sends at least one of the collected data from the faucet drive assembly, the electrical conductivity water flow assembly, and the ultrasonic flow assembly to the communication board through the main control module.

2. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The multi-channel pulse acquisition module is used to detect any one of the following: multi-channel capacitive water holding capacity pulse signals, multiple quartz pressure pulse signals, and multiple rate pulse signals composed of combinations of capacitive water holding capacity pulse signals and quartz pressure pulse signals in different layers within the well.

3. The universal acquisition circuit for simultaneous injection and sampling as described in claim 2, characterized in that, The priority of the main control module uploading any one of the data from the faucet drive assembly, the electrical conductivity water flow assembly, and the ultrasonic flow assembly collected by the UART interface module to the communication board is higher than the priority of the main control module uploading any one of the analog voltage signal, the first analog differential signal, the second analog differential signal, and the pulse signals of different layers to the communication board.

4. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The circuit further includes an ADC data acquisition module, which is electrically connected to the main control module and is used to perform analog-to-digital conversion on the analog voltage signal, the first analog differential signal, and the second analog differential signal, respectively.

5. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The area of ​​the analog signal processing board is 2000 mm². 2 Up to 3000mm 2 The area of ​​the control acquisition board is 2000 mm². 2 Up to 3000mm 2 .

6. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The analog signal processing board and the control acquisition board are both powered by 3.3V to 5V.

7. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The analog signal processing board outputs a voltage less than or equal to 3.3V.

8. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The multi-channel interface voltage of the UART interface module is 3.3V.

9. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The multi-channel interface voltage of the multi-channel pulse acquisition module is 3.3V.

10. The universal acquisition circuit for simultaneous injection and sampling as described in claim 1, characterized in that, The microcontroller unit in the main control module exchanges data with the field-programmable gate array via an SPI bus.

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