Intelligent water supply system and method based on supply and injection balance

Abstract

The invention relates to the field of water supply in the petroleum industry, and discloses an intelligent water supply system and method based on supply and injection balance. On the basis that a water source well, an adjusting water tank, a raw water tank, a water treatment device, a clear water tank and a high-pressure water distribution valve set pipeline are sequentially connected, a first control assembly is arranged between the water source well and the adjusting water tank; a second control assembly is arranged between the adjusting water tank and the raw water tank; a third control assembly is arranged between the raw water tank and the water treatment device; a fourth control assembly is arranged between the clear water tank and the high-pressure water distribution valve group pipeline; the intelligent water well system is in communication connection with the first control assembly, the second control assembly, the third control assembly and the fourth control assembly and can effectively monitor the water injection amount among the water source well, the adjusting water tank, the raw water tank, the water treatment device, the clear water tank and the high-pressure water distribution valve bank pipe in real time. And the balance of the water injection rate can be effectively ensured in the adjusting process through the intelligent water well system.

Description

Technical Field

[0001] The present invention relates to the field of water supply in the petroleum industry, and in particular to an intelligent water supply system and method based on supply-injection balance. Background Art

[0002] During the exploitation process of oil fields, due to the continuous attenuation of formation energy, water injection is needed to maintain underground pressure and achieve energy balance of the formation. During the water injection process, it is often necessary to adjust the water allocation of the injection well in time according to the production dynamics of the injection well, and the water supply also needs to be adjusted according to the water injection demand.

[0003] In the 1990s, China introduced foreign automation technology to realize data collection and monitoring of water supply and injection systems. Entering the 21st century, many universities and companies have increased their research and development efforts on intelligent water injection monitoring systems for oil fields and achieved many results, realizing data collection and control of oil and water wells. At present, major oil fields have basically realized the monitoring of the operating status of oil and water wells, as well as the monitoring of the main parameters of water supply and injection stations, mainly including water supply pressure, water supply flow, motor current, voltage, water tank level, pump status, water well status, etc.

[0004] At present, although the oil fields have realized the digitization of the water supply system, they can use the automated terminal system to remotely operate the water source wells. At the same time, some oil fields use PLC and frequency converters to monitor the external water pressure and the liquid level of the water tank of the water supply system. They can automatically adjust the water volume according to the pressure of the external pipeline to achieve constant pressure water supply, and can also automatically start and stop the water supply pump according to the liquid level of the water tank. Since the staff cannot grasp the demand for water injection in real time, the frequency conversion regulation is only an extensive regulation, which leads to the phenomenon of imbalance in water injection volume during the regulation process, causing the water supply pump to start and stop frequently, and unable to achieve continuous water supply production. Summary of the invention

[0005] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide an intelligent water supply system and method based on supply and injection balance, so as to solve the technical problem that the water supply system is prone to imbalance in water supply and injection, resulting in frequent start and stop of the water supply pump.

[0006] The present invention is achieved through the following technical solutions:

[0007] An intelligent water supply system based on supply and injection balance comprises a water source well, a regulating water tank, a raw water tank, a water treatment device, a clean water tank and an intelligent water well system; the output end of the water source well is connected to the input end of the regulating water tank, the output end of the regulating water tank is connected to the input end of the raw water tank, the output end of the raw water tank is connected to the input end of the water treatment device, the output end of the water treatment device is connected to the input end of the clean water tank, and the output end of the clean water tank is connected to a high-pressure water distribution valve group pipeline; a first control component is arranged between the water source well and the regulating water tank, a second control component is arranged between the regulating water tank and the raw water tank; a third control component is arranged between the raw water tank and the water treatment device, and a fourth control component is arranged between the clean water tank and the high-pressure water distribution valve group pipeline; the intelligent water well system is communicatively connected with the first control component, the second control component, the third control component and the fourth control component respectively.

[0008] Preferably, a submersible pump level gauge is provided in the water source well, and the submersible pump level gauge is communicatively connected to the intelligent water well system.

[0009] Furthermore, the first control component includes a submersible pump frequency converter and a water source well flow meter, one end of the submersible pump frequency converter is electrically connected to the submersible pump level meter, and the other end is electrically connected to the water source well flow meter; the submersible pump frequency converter and the water source well flow meter are respectively communicatively connected to the intelligent water well system.

[0010] Preferably, a regulating water tank level gauge is provided in the regulating water tank, and the regulating water tank level gauge is communicatively connected to the intelligent water well system.

[0011] Preferably, the second control component includes a water supply pump and a water supply pump inverter; one end of the water supply pump is connected to the regulating water tank, and the other end is connected to the raw water tank; one end of the water supply pump inverter is connected to the water supply pump, and the other end is connected to the intelligent water well system.

[0012] Preferably, a raw water tank level gauge is provided in the raw water tank; the raw water tank level gauge is communicatively connected to the intelligent water well system.

[0013] Preferably, the third control component includes a water transfer pump and a water transfer pump frequency converter; one end of the water transfer pump is connected to the raw water tank, and the other end is connected to the water treatment device; one end of the water transfer pump frequency converter is connected to the water transfer pump, and the other end is connected to the intelligent water well system.

[0014] Preferably, a clean water tank level gauge is provided in the clean water tank, and the clean water tank level gauge is connected to the intelligent water well system.

[0015] Preferably, the fourth control component is a water injection pump and a water distribution valve group flow meter, one end of the water injection pump is connected to the clean water tank, and the other end is connected to the high-pressure water distribution valve group pipeline, and the water distribution valve group flow meter is installed on the water injection pump.

[0016] An intelligent water supply method based on supply-injection balance, based on the above-mentioned intelligent water supply system based on supply-injection balance, includes the following process:

[0017] The intelligent water well system collects the daily injection volume of the water distribution wells under the jurisdiction of the water injection station reported by the oil production plant, and calculates the total injection volume;

[0018] The intelligent water well system reads the liquid level gauge value of the water source well, and sorts the water source wells according to the height of the liquid level gauge. After sorting, it sends instructions to the first control component and starts the water source wells from high to low according to the liquid level. The intelligent water well system calculates the total water supply value / injection amount of the water source wells under the jurisdiction of the water supply station. When it reaches ±10%, it stops starting the remaining water source wells;

[0019] The intelligent water well system collects the liquid level value of the regulating water tank; when the liquid level of the regulating water tank reaches 1 / 2 of the tank height of the regulating water tank, the intelligent water well system controls the second control component and sets the water source well to operate at the medium frequency according to the total water demand, and transports the water from the source to the raw water tank;

[0020] The intelligent water well system collects the liquid level value of the raw water tank. If the liquid level reaches 1 / 2 of the raw water tank height, the intelligent water well system controls the third control component to transport the source water to the water treatment device, and the treated source water enters the clean water tank;

[0021] The intelligent water well system collects the liquid level value of the clean water tank; if the liquid level reaches 1 / 2 of the height of the clean water tank, the intelligent water well system controls the fourth control component to inject water into the high-pressure water distribution valve group, and collects the actual injected water volume of each injection branch line through the fourth control group, and automatically matches and balances it with the water supply.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] The present invention provides an intelligent water supply system based on supply and injection balance. On the basis that a water source well, a regulating water tank, a raw water tank, a water treatment device, a clean water tank and a high-pressure water distribution valve group pipeline are connected in sequence, a first control component is set between the water source well and the regulating water tank, and a second control component is set between the regulating water tank and the raw water tank; a third control component is set between the raw water tank and the water treatment device, and a fourth control component is set between the clean water tank and the high-pressure water distribution valve group pipeline; the intelligent water well system is respectively connected to the first control component, the second control component, the third control component and the fourth control component for communication, and can effectively monitor the water injection volume between the water source well, the regulating water tank, the raw water tank, the water treatment device, the clean water tank and the high-pressure water distribution valve group pipe in real time, and the intelligent water well system can effectively ensure the balance of water injection volume during the adjustment process. The present invention has the functions of real-time data acquisition, monitoring, intelligent control, index statistics and evaluation, and changes the traditional oilfield water supply production management mode. The entire architecture of the system adopts cloud technology models such as microservices and containerization. It collects instrument data in real time, analyzes and calculates the data, obtains the parameters of supply and injection balance, and intelligently controls water supply production. At the same time, it can monitor equipment conditions, water tank liquid level, operating pressure, flow and other parameters in real time, and issue early warning alarms.

[0024] The present invention also provides an intelligent water supply method based on supply-injection balance, which can adjust the water supply of the oil field's water source well and water supply station in real time according to the daily water injection volume of the intelligent water well system through the communication connection of the control components between the intelligent water well system and the water source well, the regulating water tank, the raw water tank, the water treatment device and the clean water tank, and perform real-time and accurate water supply control, and has high safety, which can effectively prevent the problem of water imbalance during conventional water supply. The present invention breaks the time and space boundaries of traditional production, integrates the production of water source wells, water supply stations, water injection stations, water distribution rooms, etc. with innovations such as big data and cloud computing, and realizes dynamic optimization and closed-loop management of the water supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the intelligent water supply system based on supply and injection balance in the present invention;

[0026] Figure 2 This is a flow chart of the intelligent water supply method based on supply and injection balance in the present invention.

[0027] In the figure: 1-water source well; 2-regulating water tank; 3-water supply pump; 4-raw water tank; 5-water transfer pump; 6-water treatment device; 7-water distribution valve group flow meter; 8-clean water tank; 9-intelligent water well system; 10-water injection pump; 11-submersible pump level meter; 12-submersible pump inverter; 13-water source well flow meter; 14-regulating water tank level meter; 15-water supply pump inverter; 16-raw water tank level meter; 17-water transfer pump inverter; 18-clean water tank level meter. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0030] The purpose of the present invention is to provide an intelligent water supply system and method based on supply and injection balance, so as to solve the technical problem in the prior art that an imbalance in water supply and injection volume easily occurs in the water supply system, resulting in frequent starts and stops of the water supply pump.

[0031] See also Figure 1 The present invention provides an intelligent water supply system based on supply and injection balance, comprising a water source well 1, a regulating water tank 2, a raw water tank 4, a water treatment device 6, a clean water tank 8 and an intelligent water well system 9; the output end of the water source well 11 is connected to the input end of the regulating water tank 2, the output end of the regulating water tank 2 is connected to the input end of the raw water tank 4, the output end of the raw water tank 4 is connected to the input end of the water treatment device 6, the output end of the water treatment device 6 is connected to the input end of the clean water tank 8, and the output end of the clean water tank 8 is connected to the high-pressure water distribution valve group pipeline; a first control component is arranged between the water source well 1 and the regulating water tank 2, a second control component is arranged between the regulating water tank 2 and the raw water tank 4; a third control component is arranged between the raw water tank 4 and the water treatment device 6, and a fourth control component is arranged between the clean water tank 8 and the high-pressure water distribution valve group pipeline; the intelligent water well system 9 is communicatively connected with the first control component, the second control component, the third control component and the fourth control component respectively.

[0032] Specifically, a submersible pump level meter 11 is provided in the water source well 1 , and the submersible pump level meter 11 is communicatively connected to the intelligent water well system 9 .

[0033] Among them, the first control component includes a submersible pump frequency converter 12 and a water source well flow meter 13, one end of the submersible pump frequency converter 12 is electrically connected to the submersible pump level meter 11, and the other end is electrically connected to the water source well flow meter 13; the submersible pump frequency converter 12 and the water source well flow meter 13 are respectively communicated with the intelligent water well system 9.

[0034] Specifically, a regulating water tank level gauge 14 is provided in the regulating water tank 2 , and the regulating water tank level gauge 14 is communicatively connected to the intelligent water well system 9 .

[0035] Specifically, the second control component includes a water supply pump 3 and a water supply pump inverter 15; one end of the water supply pump 3 is connected to the regulating water tank 2, and the other end is connected to the raw water tank 4; one end of the water supply pump inverter 15 is connected to the water supply pump 3, and the other end is connected to the intelligent water well system 9.

[0036] Specifically, a raw water tank level meter 16 is provided in the raw water tank 4 ; the raw water tank level meter 16 is communicatively connected to the intelligent water well system 9 .

[0037] Specifically, the third control component includes a water transfer pump 5 and a water transfer pump inverter 17; one end of the water transfer pump 5 is connected to the raw water tank 4, and the other end is connected to the water treatment device 6; one end of the water transfer pump inverter 17 is connected to the water transfer pump 5, and the other end is connected to the intelligent water well system 9.

[0038] Specifically, the fourth control component is a water injection pump 10 and a water distribution valve group flow meter 7. One end of the water injection pump 10 is connected to the clean water tank 8, and the other end is connected to the high-pressure water distribution valve group pipeline. The water distribution valve group flow meter 7 is installed on the water injection pump 10.

[0039] The intelligent water supply system based on supply and injection balance provided by the present invention includes three functions: linkage automatic control of water source wells, constant liquid level water supply at water supply stations, and constant pressure water injection at water injection stations. The linkage control of the water tank and pump of the water supply and injection station is realized through the site PLC, and the PLC equipment collects the front-end data in real time to realize automatic continuous water supply on demand; the intelligent water supply of the water source well is realized through the intelligent water supply system, and the real-time collected water source well and water supply and injection station data are called from the SCADA system, and the intelligent calculation and control program is triggered according to the time point to calculate the error value between the current actual water supply and the actual water injection. If it is not within the range, the ratio of the water production of the water source well to the actual water injection is recalculated, and the control data is sent to control the start and stop of the water source well or alarm prompt.

[0040] See also Figure 2 The present invention provides an intelligent water supply method based on supply-injection balance, based on the above-mentioned intelligent water supply system based on supply-injection balance, including the following process:

[0041] The intelligent water well system 9 collects the daily injection volume of the water distribution wells under the jurisdiction of the water injection station reported by the oil production plant, and calculates the total injection volume;

[0042] The intelligent water well system 9 reads the liquid level gauge value of the water source well 1, and sorts the water source wells 1 according to the height of the liquid level gauge. After sorting, it sends instructions to the first control component, and starts the water source wells 1 from high to low according to the liquid level. The intelligent water well system 9 calculates the total water supply value / injection amount of the water source wells under the jurisdiction of the water supply station. When it reaches ±10%, it stops starting the remaining water source wells 1;

[0043] The intelligent water well system 9 collects the liquid level value of the regulating water tank 2; when the liquid level of the regulating water tank 2 reaches 1 / 2 of the tank height of the regulating water tank 2, the intelligent water well system 9 controls the second control component and sets the water source well to operate at the medium frequency according to the total water demand, and transports the water source to the raw water tank 4;

[0044] The intelligent water well system 9 collects the liquid level value of the raw water tank 4. If the liquid level reaches 1 / 2 of the raw water tank 4, the intelligent water well system 9 controls the third control component to transport the source water to the water treatment device 6, and the treated source water enters the clean water tank 8;

[0045] The intelligent water well system 9 collects the liquid level value of the clean water tank 8; if the liquid level reaches 1 / 2 of the height of the clean water tank 8, the intelligent water well system 9 controls the fourth control component to inject water into the high-pressure water distribution valve group, and collects the actual injected water volume of each water injection branch line through the fourth control group, and automatically matches and balances it with the water supply.

[0046] Example

[0047] This embodiment provides an intelligent water supply system based on supply and injection balance. When in use:

[0048] The intelligent water well system 9 collects the daily injection volume of the water distribution wells under the jurisdiction of the water injection station reported by the oil production plant, and calculates the total injection volume; the intelligent water well system 9 remotely reads the value of the submersible pump level meter 11, and sorts the water source wells 1 according to the liquid level. After sorting, it sends instructions to the submersible pump inverter 12 to start the water source well 1 from high to low according to the liquid level. The intelligent water well system 9 calculates the water supply value / the total injection volume of the water source wells under the jurisdiction of the water supply station. When it reaches ±10%, the remaining water source wells 1 are stopped; the intelligent water well system 9 automatically collects the liquid level value of the water tank 2 by adjusting the water tank level meter 14; if the liquid level of the water tank 2 reaches 1 / 2 of the tank height, the intelligent water well system 9 sends instructions to the PLC of the water supply pump inverter 15 to start The water supply pump 3 is started, and the water source well is operated at the medium frequency according to the total water demand setting, and the water from the water source is delivered to the raw water tank 4; the intelligent water well system 9 automatically collects the liquid level value of the raw water tank 4 through the raw water tank level meter 16; if the liquid level of the raw water tank 4 reaches 1 / 2 of the tank height, the intelligent water well system 9 sends a command to the PLC of the water pump inverter 17 to start the water pump 5 to deliver the incoming water to the water treatment device 6, and the treated water enters the clean water tank 8; the intelligent water well system 9 automatically collects the liquid level value of the clean water tank 8 through the clean water tank level meter 18; if the liquid level of the clean water tank 8 reaches 1 / 2 of the tank height, the intelligent water well system 9 sends a command to the PLC of the water injection pump 10 inverter to start the water injection pump 10 to inject water into the high-pressure water distribution valve group;

[0049] The intelligent water well system 9 automatically collects the actual water volume injected into each water injection branch through the water distribution valve group flow meter 7, and automatically matches and balances it with the water supply. According to the calculated value of the supply-injection balance, if the water supply is too much, the water source well pump PLC is adjusted to reduce the motor speed and reduce the water supply; if the water supply is too little, the water source well pump PLC is adjusted to increase the motor speed and increase the water supply. If the value is greater than 10%, the water supply capacity is excessive, and the water source well status is automatically counted, sorted according to the liquid level, and a pop-up window is displayed to prompt whether to close the low-liquid-level water source well with a difference of about 10% from the water supply and injection volume. At the same time, the water supply of other water source well pump PLCs is adjusted to achieve supply-injection balance, and the stable fluctuation of the raw water tank liquid level is between 1 / 3 tank height and 2 / 3 tank height. If the value is less than -10%, the water supply capacity is calculated. If the water supply can meet the requirements, the two water source well PLCs are started to increase the motor speed and increase the water supply; if the water supply capacity is insufficient, the system pops up a window to prompt that the water supply capacity is insufficient and it is recommended to increase the water source well.

[0050] The present invention establishes a process control model based on "supply-injection balance", and uses intelligent water well system software and intelligent water supply system hardware to collect data such as daily water production of water source wells, water delivery outside water supply stations, water injection of water injection stations, and actual water injection of single wells in real time. The actual daily water injection volume is counted, and the water supply of the water source wells and water supply stations in the oil field is adjusted in real time to perform precise water supply control and achieve supply-injection balance.

[0051] The system has the functions of pump condition diagnosis, tank level, pressure, overfilling and underfilling and other parameter early warning alarms. Regularly count the flow and pressure data of submersible pumps, water supply pumps, water transfer pumps, and water injection pumps, draw pump performance curves, and compare them with the standard PQ curve of the pumps to automatically calculate pump efficiency and realize pump condition diagnosis. According to the real-time changes in water injection and water supply, calculate and predict the changes in water tank level, draw a trend chart of water tank level changes, and predict the water tank level in advance. Water tank level high and low limit alarms, abnormal pressure of water source wells and water injection wells, overfilling and underfilling alarms, etc.

[0052] The present invention dynamically optimizes the water supply system and performs closed-loop management of source supply, housing and distribution based on the model. It can automatically start and stop the water source wells according to the liquid level according to the changes in the water injection volume; it can intelligently compensate the pressure according to the relationship between the injection wellhead pressure and the water distribution volume, and intelligently adjust the water distribution volume by real-time calculation of over-injection and under-injection.

[0053] The present invention has the function of counting water supply volume.

[0054] Daily water supply indicator statistics: starting at 7:00 every day, collect the daily (24h) water supply of the water source wells under your jurisdiction, the water storage capacity of all water tanks, and the actual daily (24h) water injection volume of the injection wells, and automatically calculate the daily water profit and loss.

[0055] Monthly water supply indicator statistics: starting from the 1st of the month, the water supply + storage capacity of the water source wells under the jurisdiction and the actual water injection volume of the injection wells are counted, and the monthly water profit and loss are automatically calculated.

[0056] Annual water supply index statistics: starting from January 1st of each year, the monthly water supply of the water source wells and the monthly water injection volume of the injection wells under the jurisdiction will be counted, and the annual water profit and loss will be automatically calculated.

[0057] Comparative analysis of daily water source well production and injected water volume, display of water source well production trend chart and injected water volume change trend chart can effectively improve the efficiency of water supply production statistics. At the same time, by comparing flow changes, early warning of pipeline leaks can be given in a timely manner.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An intelligent water supply system based on supply and injection balance, characterized in that: The invention comprises a water source well (1), a regulating water tank (2), a raw water tank (4), a water treatment device (6), a clean water tank (8) and an intelligent water well system (9); the output end of the water source well (11) is connected to the input end of the regulating water tank (2), the output end of the regulating water tank (2) is connected to the input end of the raw water tank (4), the output end of the raw water tank (4) is connected to the input end of the water treatment device (6), the output end of the water treatment device (6) is connected to the input end of the clean water tank (8), and the output end of the clean water tank (8) is connected to a high-pressure water distribution valve group pipeline; a first control component is arranged between the water source well (1) and the regulating water tank (2), a second control component is arranged between the regulating water tank (2) and the raw water tank (4); a third control component is arranged between the raw water tank (4) and the water treatment device (6), and a fourth control component is arranged between the clean water tank (8) and the high-pressure water distribution valve group pipeline; the intelligent water well system (9) is communicatively connected to the first control component, the second control component, the third control component and the fourth control component respectively.

2. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: A submersible pump level meter (11) is provided in the water source well (1), and the submersible pump level meter (11) is communicatively connected to the intelligent water well system (9).

3. The intelligent water supply system based on supply and injection balance according to claim 2 is characterized in that: The first control component comprises a submersible pump frequency converter (12) and a water source well flow meter (13); one end of the submersible pump frequency converter (12) is electrically connected to the submersible pump level meter (11), and the other end is electrically connected to the water source well flow meter (13); the submersible pump frequency converter (12) and the water source well flow meter (13) are respectively connected to the intelligent water well system (9) for communication.

4. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: A regulating water tank level gauge (14) is provided in the regulating water tank (2), and the regulating water tank level gauge (14) is communicatively connected to the intelligent water well system (9).

5. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: The second control component comprises a water supply pump (3) and a water supply pump frequency converter (15); one end of the water supply pump (3) is connected to the regulating water tank (2), and the other end is connected to the raw water tank (4); one end of the water supply pump frequency converter (15) is connected to the water supply pump (3), and the other end is connected to the intelligent water well system (9).

6. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: A raw water tank level meter (16) is provided in the raw water tank (4); the raw water tank level meter (16) is communicatively connected to the intelligent water well system (9).

7. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: The third control component comprises a water transfer pump (5) and a water transfer pump frequency converter (17); one end of the water transfer pump (5) is connected to the raw water tank (4), and the other end is connected to the water treatment device (6); one end of the water transfer pump frequency converter (17) is connected to the water transfer pump (5), and the other end is connected to the intelligent water well system (9).

8. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: A clean water tank level gauge (18) is provided in the clean water tank (8), and the clean water tank level gauge (18) is connected to the intelligent water well system (9).

9. The intelligent water supply system based on supply and injection balance according to claim 1, characterized in that: The fourth control component is a water injection pump (10) and a water distribution valve group flow meter (7). One end of the water injection pump (10) is connected to the clean water tank (8), and the other end is connected to the high-pressure water distribution valve group pipeline. The water distribution valve group flow meter (7) is installed on the water injection pump (10).

10. An intelligent water supply method based on supply-injection balance, based on an intelligent water supply system based on supply-injection balance according to any one of claims 1 to 9, characterized in that: The process includes the following: The intelligent water well system (9) collects the daily injection volume of the water wells under the jurisdiction of the water injection station reported by the oil production plant, and calculates the total injection volume; The intelligent water well system (9) reads the liquid level gauge value of the water source well (1), and sorts the water source wells (1) according to the height of the liquid level gauge. After sorting, it sends an instruction to the first control component, and starts the water source wells (1) from high to low according to the liquid level. The intelligent water well system (9) calculates the total water supply value / injection amount of the water source wells under the jurisdiction of the water supply station, and stops starting the remaining water source wells (1) when it reaches ±10%; The intelligent water well system (9) collects the liquid level value of the regulating water tank (2); when the liquid level of the regulating water tank (2) reaches 1 / 2 of the tank height of the regulating water tank (2), the intelligent water well system (9) controls the second control component and sets the water source well to operate at a medium frequency according to the total water demand, and transports the water from the water source to the raw water tank (4); The intelligent water well system (9) collects the liquid level value of the raw water tank (4). If the liquid level reaches 1 / 2 of the height of the raw water tank (4), the intelligent water well system (9) controls the third control component to transport the source water to the water treatment device (6), and the treated source water enters the clean water tank (8); The intelligent water well system (9) collects the liquid level value of the clean water tank (8); if the liquid level reaches 1 / 2 of the tank height of the clean water tank (8), the intelligent water well system (9) controls the fourth control component to inject water into the high-pressure water distribution valve group, and collects the actual injected water volume of each water injection branch line through the fourth control group, and automatically matches and balances it with the water supply volume.

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