Intelligent control method and system for adjusting production parameters of one-machine double-well pumping unit

By using a comprehensive evaluation index based on production volume and pump efficiency, the intelligent control system automatically adjusts the parameters of the dual-well pumping unit, solving the problem of unreasonable parameter adjustment in traditional methods and improving oil well production efficiency and cost.

CN121407892APending Publication Date: 2026-01-27PETROCHINA CO LTD
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Patent Information

Application Number
CN202410997768.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-07-24
Publication Date
2026-01-27

AI Technical Summary

Technical Problem

Existing technologies make it difficult to effectively adjust the production parameters of a dual-well pumping unit, making it difficult to determine the optimal production parameters for the two wells. Furthermore, traditional methods require manual adjustment and cannot achieve automatic real-time adjustment and optimal parameter matching.

Method used

By adopting a comprehensive evaluation index based on production volume and pump efficiency, the operating parameters of the pumping unit are automatically adjusted by an intelligent control system. By combining production volume and pump efficiency, the parameters of the two wells are balanced, avoiding the impact of adjusting a single parameter on the other well.

Benefits of technology

It achieves automatic and precise adjustment of a single pumping unit for two wells, improving oil well production efficiency, reducing production costs, and is suitable for environments with unstable fluid supply. It avoids the shortcomings of traditional methods and achieves the optimal operating state of the system.

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Abstract

According to the intelligent control method and system for adjusting the production parameters of the one-machine twin-well pumping unit based on double balance of the liquid production capacity and the efficiency of the oil well pump, the parameter adjusting principle is simple, the data size is small, and calculation is rapid; according to the system, the liquid production capacity and the pump efficiency of two wells can be considered at the same time, meanwhile, the system can automatically find the optimal working parameters, manual input is not needed, automatic and accurate adjustment of the oil well stroke frequency is achieved, and the oil well production efficiency is improved. The method comprises the following steps of: 1, calculating comprehensive evaluation indexes of a current twin-well pumping unit system under different operating parameters, and screening system target values from the comprehensive evaluation indexes; 2, calculating a new comprehensive evaluation index of the twin-well pumping unit system after the twin-well pumping unit system operates for a set time under the common operation parameters, and comparing the new comprehensive evaluation index with a system target value; 3, a control instruction is sent to a twin-well pumping unit system control module according to the comparison result so as to adjust the operation parameters of the pumping unit; the comprehensive evaluation index is calculated based on the liquid production capacity of the double wells and the efficiency of the oil well pump.
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Description

Technical Field

[0001] This invention belongs to the field of oilfield automation control technology, specifically relating to an intelligent control method and system for adjusting the production parameters of a dual-well pumping unit based on a dual-balance regulation of fluid production and pump efficiency. Background Technology

[0002] In recent years, cluster wells and infill wells have been widely used in oilfields due to their advantages such as low drilling costs and ease of subsequent production management. To meet the needs of efficient development of these wells, the dual-well pumping unit has emerged. A dual-well pumping unit utilizes a single power system to simultaneously power two adjacent wells. When one well moves upward, the other moves downward, with the load on the two wells alternating, acting as a counterweight for each other. This method reduces the motor load, achieving energy savings. Simultaneously, it eliminates the need for a separate power drive system, lowering initial investment, and represents a major direction for future pumping unit development.

[0003] Due to the complexity of dual-well oil production systems, the optimal production parameters for the two wells are often difficult to determine. Limited by the mechanical structure, the production parameters of the two wells cannot be completely independent; adjusting the parameters of one well often has far-reaching consequences. Adjusting the parameters of one well will simultaneously change the production parameters of the other well, potentially causing a decrease in the overall operating efficiency of the pumping unit. Currently, there is a lack of mature methods for automatic parameter adjustment applicable to dual-well systems.

[0004] Chinese invention patent CN105909219A discloses a method for changing the stroke of a dual-well pumping unit, providing a method for adjusting the pumping unit stroke, namely, adjusting the stroke by adding a bushing to the drive drum. This method has the following drawbacks: 1) The bushing requires additional machining, which is difficult and costly; 2) Manual installation is required, which is labor-intensive and time-consuming; 3) This method can only be used with single-well pumping units that use a drum assembly, resulting in low applicability.

[0005] Chinese invention patent CN115596409A discloses a method for adjusting the effective stroke of a dual-well pumping unit. Its key feature is that it calculates the stroke ratio required by the two wells based on the actual fluid production of the dual-well pumping unit and the pump diameter. Based on this ratio, it determines which well requires a smaller stroke. By raising the sucker rod of the well requiring a smaller stroke, part of the downhole pump plunger is pulled out of the pump casing, thereby reducing the effective stroke and achieving operational matching. Compared to patent CN105909219A, this method requires no manual operation; the entire process only requires raising the sucker rod to move the downhole pump plunger, making the operation safe and simple. However, the following shortcomings exist in field practice: 1) This method requires calculating and plotting the IPR curve of the oil well. In oilfield practice, wells using a dual-well system often have very low production and discontinuous formation fluid supply. The IPR curve of such wells differs significantly from the traditional classical theory. Therefore, the results predicted using the traditional IPR curve will have a large error compared to reality; 2) This method requires too many types of basic data, and it is generally difficult to collect all the data in the field; 3) The idea behind this method is to adjust the parameters of one well to "match" the other well. Whether such adjustment is reasonable and whether it can make the dual-well system reach the optimal operating state cannot be guaranteed; 4) This method still requires manual adjustment after shutdown. Once adjusted, it is used for a long time and cannot be automatically adjusted in real time according to changes in well conditions. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides an intelligent control method and system for adjusting the production parameters of a dual-well pumping unit based on a dual balance of production volume and pump efficiency. This method has a simple parameter adjustment principle, requires little data, and is fast in calculation. It can simultaneously take into account the production volume and pump efficiency of both wells, avoiding the problem of traditional methods where adjusting parameters for one well affects the production of the other. At the same time, the system automatically finds the optimal operating parameters without manual input, achieving truly automatic and precise adjustment of well stroke frequency and improving well production efficiency.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows:

[0008] A smart control method for adjusting the production parameters of a dual-well pumping unit, comprising the following steps:

[0009] Step 1: Calculate the comprehensive evaluation index of the current dual-well pumping unit system under different operating parameters, in order to select the system target value;

[0010] Step 2: Calculate the new comprehensive evaluation index of the dual-well pumping unit system after running for a set time under common operating parameters, and compare the new comprehensive evaluation index with the system target value;

[0011] Step 3: Based on the above comparison results, send control commands to the dual-well pumping unit system control module to adjust the pumping unit operating parameters;

[0012] The comprehensive evaluation indicators mentioned above are calculated based on the fluid production and pump efficiency of the two wells.

[0013] Furthermore, step 1 specifically involves: starting the pumping unit with common operating parameters, obtaining the current production volume of the two wells, calculating and recording the comprehensive evaluation index; adjusting the operating parameters of the pumping unit multiple times, obtaining the current production volume of the two wells after a set operating time, calculating and recording the comprehensive evaluation index; until the operating parameters are adjusted to the set minimum value, and selecting the maximum value among the recorded comprehensive evaluation indices under different operating parameters as the system target value.

[0014] Furthermore, the step of sending control commands to the dual-well pumping unit system control module based on the comparison results to adjust the pumping unit operating parameters specifically includes:

[0015] (1) If the new comprehensive evaluation index is greater than the system target value, then output the command to increase the speed of the pumping motor, and set the new comprehensive evaluation index as the new system target value. Then execute step 2 to recalculate the new comprehensive evaluation index of the dual-well pumping unit system after running for a set time under common operating parameters and compare it with the updated system target value.

[0016] (2) If the new comprehensive evaluation index is less than the system target value, then output the command to reduce the speed of the pumping motor, execute step 2, recalculate the new comprehensive evaluation index of the dual-well pumping unit system after running for a set time under common operating parameters, and compare it with the system target value.

[0017] (3) If the new comprehensive evaluation index equals the system target value, then the pumping motor speed remains unchanged, and repeat steps 2-3.

[0018] Furthermore, the comprehensive evaluation index A is calculated based on the following model:

[0019]

[0020] Where: q1 and q2 are the current production rates of the two oil wells, respectively; Q1 and Q2 are the production rates of the two oil wells under commonly used operating parameters, respectively; w is the current comprehensive pumping efficiency of the two oil wells; Q1' and Q2' are the theoretical production rates of the two oil wells under the current operating parameters; a and b are weighting coefficients.

[0021] In addition, this application also provides an intelligent control system for adjusting the production parameters of a dual-well pumping unit, used to implement the above method, comprising at least:

[0022] Production volume metering device: installed at the wellheads of the two oil wells to measure the production volume of the two oil wells;

[0023] Calculation, control and storage module: connected to the liquid production metering device, used to receive the liquid production data transmitted by the liquid production metering device, calculate the current comprehensive evaluation index through the comprehensive evaluation index calculation model, and output control signals according to the current comprehensive evaluation index;

[0024] Variable frequency speed control device: connected between the computing control and storage module and the dual-well pumping unit system, used to receive control signals from the computing control and storage module and adjust the operating parameters of the dual-well pumping unit system according to the control signals.

[0025] Furthermore, it also includes a display / control module, which is connected to the computing control and storage module, and is used to display the operating status parameters of the dual-well pumping unit.

[0026] Furthermore, the computing control and storage module is preferably one of a microcontroller, PLC, or RTU, but is not limited to these three options. Other existing models and types that can receive and transmit signals, process and store data, and control external devices or systems according to preset programs or logic can also be selected.

[0027] In addition, this application also provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the above-described intelligent control method.

[0028] In addition, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described intelligent control method.

[0029] In addition, this application also provides the application of the intelligent control method for adjusting the production parameters of a single-unit dual-well pumping unit, or the intelligent control system for adjusting the production parameters of a single-unit dual-well pumping unit, in beam-type single-unit dual-well pumping units and single-unit dual-well hydraulic pumping units.

[0030] Based on the above solution, the beneficial effects of this application include:

[0031] This invention, by introducing comprehensive evaluation indicators, simultaneously considers the production rate and pump efficiency of two wells, balancing pump efficiency and production rate. This enables precise adjustment of the automatic stroke rate of a dual-well pumping unit, improving the system efficiency of the oil well. This invention is applicable not only to wells with sufficient fluid supply and a relatively stable production environment, but also to wells with unstable fluid supply and significant downhole environmental changes. This method combines production rate and pump efficiency for comprehensive judgment, avoiding the shortcomings of traditional single-parameter adjustment of pumping unit parameters, which fails to achieve optimal system performance. This method considers maximizing the overall efficiency of both wells as the goal, avoiding the drawback of traditional parameter adjustment that affects the production of the other well while only adjusting one well. Based on this, the intelligent control method allows the system to automatically find the optimal parameters, avoiding the problem of unreasonable manually input target values. This method requires less computation, greatly reducing memory usage and improving judgment speed, enabling real-time on-site adjustment. Attached Figure Description

[0032] Figure 1 This is a flowchart of the method of the present invention;

[0033] Figure 2 This is a structural block diagram of an automatic control system based on the method of this invention;

[0034] Figure 3 This is a schematic diagram of the use of a beam-type single-unit dual-well pumping unit as described in Application Example 1 of the present invention;

[0035] Figure 4 This is a schematic diagram of the use of a dual-well hydraulic pumping unit as described in Application Example 2 of the present invention.

[0036] In the diagram: 1-Production volume metering device, 2-Ground control system, 3-Rope wheel type hydraulic pumping unit main unit, 4-Pumping unit ground hydraulic station and control system. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1:

[0040] This embodiment provides a comprehensive evaluation index algorithm applicable to one machine with two wells.

[0041] Production rate is the most direct indicator for evaluating oil well production, while pump efficiency is used to evaluate oil well production efficiency. However, solely pursuing one indicator can negatively impact other indicators and overall benefits. Furthermore, due to the mechanical characteristics of a dual-well setup, the production parameters of the two wells are interconnected; adjusting parameters for only one well will alter the production status of the other. Therefore, combining production rate and pump efficiency, and comprehensively considering the production status of both wells, is crucial for maximizing the advantages of a dual-well setup and achieving optimal overall production benefits.

[0042] The calculation method for the comprehensive evaluation index A of "one machine, two wells" is as follows:

[0043]

[0044] In the formula, q1 and q2 represent the current fluid production of the two oil wells.

[0045] Q1, Q2 — Production rates of two oil wells at the commonly used power frequency (50Hz);

[0046] w—Current combined pump efficiency calculated based on the two oil wells;

[0047] Q1' and Q2' are the theoretical production rates of the two oil wells under the current operating parameters. They are obtained by calculation using theoretical formulas or by consulting relevant technical manuals, depending on the type of oil pump used.

[0048] a and b—weighting coefficients. Depending on the oil well conditions, in this embodiment, a is selected between 0.6 and 1.5, and b is selected as 1.

[0049] The production rate and pump efficiency of two oil wells are integrated into a comprehensive evaluation index through an algorithm, taking into account both production rate and pump efficiency, for use in field parameter adjustment evaluation.

[0050] Example 2:

[0051] This embodiment provides an intelligent control method for the production parameters of a single-unit dual-well pumping unit based on the comprehensive evaluation index algorithm described in Embodiment 1. This method enables intelligent operation of the single-unit dual-well pumping unit without human intervention, improving the overall efficiency and effectiveness of the single-unit dual-well system. It includes the following steps:

[0052] Step 1: Start the pumping unit at the power frequency (50Hz, or common operating parameters), obtain the current fluid production of the two oil wells, calculate the comprehensive evaluation index and record it;

[0053] Step 2: Adjust the frequency (or operating parameters), run for a period of time, obtain the current oil well production, calculate the comprehensive evaluation index and record it;

[0054] Step 3: Repeat Step 2 until the frequency (or operating parameters) drops to the set minimum value. Based on the comprehensive evaluation index recorded by the system at different frequencies (or parameters), select the maximum value as the system target value. The above three steps are for initially determining the optimal evaluation index for this two-well oil production system.

[0055] Step 4: The system returns to the mains frequency (or common parameters) for operation;

[0056] Step 5: After running for a period of time, obtain the fluid production of the two wells, calculate the pump efficiency and the new comprehensive evaluation index;

[0057] Step 6: Compare the comprehensive evaluation index with the system target value, and send control commands to the dual-well pumping unit system control module based on the comparison results to adjust the pumping unit stroke rate or motor operating speed. Specific methods include:

[0058] (1) If the new comprehensive evaluation index > the system target value, then output the command to increase the speed of the pumping motor, and set the new comprehensive evaluation index as the new system target value, and return to step 5;

[0059] (2) If the new comprehensive evaluation index is less than the system target value, then issue a command to reduce the speed of the pumping motor and return to step 5;

[0060] (3) If the new comprehensive evaluation index equals the system target value, then the motor speed remains unchanged, and return to step 5.

[0061] The adjustment and comparison results combine the data from the two oil wells for comprehensive parameter adjustment, taking into account both production and efficiency. While making full use of the downhole fluid supply capacity, the dual-well oil production system is kept in optimal condition, which greatly reduces the production cost of the oil wells and improves the economic benefits of oilfield production.

[0062] Example 3:

[0063] This embodiment provides a control system based on the method described in Embodiment 2. Figure 2 This is its system structure diagram. The current production volume is obtained through the surface production volume metering device and transmitted to the calculation, control, and storage module. The calculation, control, and storage module calculates the current pump efficiency and comprehensive evaluation indicators, and then controls the output of the variable frequency drive (VFD) according to the programmed steps. The VFD changes the operating parameters of the motor or pumping unit system according to instructions. The display / control module is connected to the calculation, control, and storage module to display the operating status parameters of the dual-well pumping unit. It can also monitor the system operating status. Once an abnormality is detected (such as motor overheating, equipment failure, etc.), an alarm signal is immediately issued, and specific fault information is displayed on the screen to help operators quickly locate the problem and take appropriate measures.

[0064] Furthermore, this application also proposes a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the intelligent control method described in Embodiment 2 above.

[0065] Since this production parameter control program employs all the technical solutions of all the aforementioned embodiments when executed by the processor, it has at least all the beneficial effects brought about by all the technical solutions of all the aforementioned embodiments, which will not be elaborated here.

[0066] Furthermore, this application also proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the intelligent control method as described in Embodiment 2 above.

[0067] Since this production parameter control program employs all the technical solutions of all the aforementioned embodiments when executed by the processor, it has at least all the beneficial effects brought about by all the technical solutions of all the aforementioned embodiments, which will not be elaborated here.

[0068] Application Example 1:

[0069] Application Example 1 describes the application of the method of the present invention to a beam pumping unit with two wells, based on an automatic adjustment method for pumping unit stroke frequency that balances the production rate of the two wells and the pump efficiency. Figure 3 This is a schematic diagram illustrating the field application of this method. The method includes the following steps:

[0070] Step 1: Considering the mechanical structure of the pumping unit, a motor speed that is too low will prevent the pumping unit from starting normally. Therefore, the reasonable operating frequency of the pumping unit is set to 50-20Hz. The pumping unit operates at the power frequency (50Hz), and the production rate of the two oil wells is obtained. The comprehensive evaluation index A0 is calculated and stored in the system.

[0071]

[0072] In the formula, a and b are weighting coefficients, which are manually entered before the system runs.

[0073] Step 2: After running at frequencies of 40Hz, 30Hz, and 20Hz for 1 hour with a step size of 10Hz, obtain the oil well production at that time, calculate the comprehensive evaluation index Ai, and store the record.

[0074]

[0075] Step 3: Based on the comprehensive evaluation index recorded at different frequencies, select the maximum value A as the system target value.

[0076] Step 4: The system returns to the mains frequency (50Hz) and runs for a period of time (default setting is 30 minutes).

[0077] Step 5: Obtain the current production rate of the two wells and calculate the comprehensive evaluation index Ai;

[0078] Step 6: Compare the values ​​of Ai and A, and send an adjustment command to the control module based on the comparison result. To avoid frequent parameter adjustments of the pumping unit due to minor data differences, an allowable precision can be set (default is 0.03), as shown below:

[0079] (1) When Ai < 0.97A, the frequency converter reduces the frequency output;

[0080] (2) When Ai>1.03A, the frequency converter increases the frequency output;

[0081] (3) When 0.97A <= Ai <= 1.03A, the frequency of the inverter remains unchanged.

[0082] After step 6 outputs the new frequency command, it runs stably for 30 minutes, then returns to step 5 to continue execution.

[0083] For parameter tuning, the initial step size is set to 5Hz or 3Hz.

[0084] To avoid the impact of changes in objective conditions such as formation and reservoir on the parameter adjustment effect, it is possible to set the system to resume power frequency production after a certain period of operation (such as 10 days or 30 days), return to step 1, and recalculate the current system target value.

[0085] Application Example 2:

[0086] Application Example 2 describes the application of the intelligent parameter adjustment method of the present invention, which balances both production volume and pump efficiency, to a rope wheel type dual-well hydraulic pumping unit. Figure 4 This is a system architecture diagram showing the application of this method in the field.

[0087] The system includes: a production rate metering device 1, a rope-wheel type hydraulic pumping unit 3, and a surface hydraulic station and control system 4. The hydraulic station is placed at a suitable location at the well site and connected to the main unit via hydraulic pipelines. The core of the control system is a PLC, installed inside the hydraulic station housing. The PLC adjusts the flow rate and pressure output of the hydraulic system by controlling the speed of the motor within the hydraulic station, thereby regulating the stroke and frequency of the hydraulic main unit. Data acquired by the wellhead production rate metering device 1 is transmitted to the PLC, which calculates the current pump efficiency and comprehensive evaluation indicators.

[0088]

[0089] In the formula, q1 and q2 represent the current production rate of the oil well, Q1 and Q2 represent the production rate of the oil well at power frequency, w represents the current pumping efficiency, and a and b are weighting coefficients, which are manually input before the system is run. The specific steps for parameter adjustment include:

[0090] Step 1: Consult the hydraulic pumping unit manual to determine the reasonable operating frequency of the hydraulic pumping unit is 60-20Hz. Using a step size of 10Hz, calculate the target value of the comprehensive evaluation index using frequencies of 60, 50, 40, 30, and 20Hz.

[0091] Step 2: Run the system for 1 hour at each of the above frequencies, from highest to lowest, to obtain the production rate of the two wells at that time and calculate the comprehensive evaluation index Ai. Select the maximum value A as the target value for the current system.

[0092] Step 3: The system returns to the mains frequency (50Hz) and runs for a period of time (default setting is 30 minutes).

[0093] Step 4: Obtain the current production rate of the two wells and calculate the comprehensive evaluation index Ai;

[0094] Step 5: Compare the values ​​of Ai and A, and send an adjustment command to the control module based on the comparison result. To avoid frequent parameter adjustments of the pumping unit due to minor data differences, an allowable precision can be set (default is 0.05), as shown below:

[0095] When Ai < 0.95A, the frequency converter reduces the frequency output;

[0096] When Ai > 1.05A, the frequency converter increases the frequency output;

[0097] When 0.95A <= Ai <= 1.05A, the frequency of the inverter remains unchanged.

[0098] After step 5 outputs the new frequency command, it runs stably for 30 minutes, then returns to step 4 to continue execution.

[0099] For parameter tuning, the initial step size is set to 5Hz.

[0100] To avoid the impact of changes in objective conditions such as formation and reservoir on the parameter adjustment effect, it can be set that after a period of operation (such as 30 days), the system will be restored to 60Hz, return to step 1, and the target value of the dual-well oil production system will be recalculated.

[0101] This intelligent control method can significantly reduce the production cost of oil wells and improve the economic benefits of oilfield production. The field trial operation is stable and reliable.

[0102] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An intelligent control method for adjusting the production parameters of a dual-well pumping unit, characterized by the following steps: include: Step 1: Calculate the comprehensive evaluation index of the current dual-well pumping unit system under different operating parameters, in order to select the system target value; Step 2: Calculate the new comprehensive evaluation index of the dual-well pumping unit system after running for a set time under common operating parameters, and compare the new comprehensive evaluation index with the system target value; Step 3: Based on the above comparison results, send control commands to the dual-well pumping unit system control module to adjust the pumping unit operating parameters; The comprehensive evaluation indicators mentioned above are calculated based on the fluid production and pump efficiency of the two wells.

2. The intelligent control method for adjusting the production parameters of a dual-well pumping unit according to claim 1, characterized in that, Step 1 specifically involves: starting the pumping unit with common operating parameters, obtaining the current production volume of the two wells, calculating and recording the comprehensive evaluation index; adjusting the pumping unit operating parameters multiple times, obtaining the current production volume of the two wells after a set operating time, calculating and recording the comprehensive evaluation index; until the operating parameters are adjusted to the set minimum value, and selecting the maximum value among the recorded comprehensive evaluation indexes under different operating parameters as the system target value.

3. The intelligent control method for adjusting the production parameters of a dual-well pumping unit according to claim 1, characterized in that, The step of sending control commands to the dual-well pumping unit system control module based on the comparison results to adjust the pumping unit operating parameters is as follows: (1) If the new comprehensive evaluation index is greater than the system target value, then output the command to increase the speed of the pumping motor, and set the new comprehensive evaluation index as the new system target value. Then execute step 2 to recalculate the new comprehensive evaluation index of the dual-well pumping unit system after running for a set time under common operating parameters and compare it with the updated system target value. (2) If the new comprehensive evaluation index is less than the system target value, then output the command to reduce the speed of the pumping motor, execute step 2, recalculate the new comprehensive evaluation index of the dual-well pumping unit system after running for a set time under common operating parameters, and compare it with the system target value. (3) If the new comprehensive evaluation index equals the system target value, then the pumping motor speed remains unchanged, and repeat steps 2-3.

4. The intelligent control method for adjusting the production parameters of a single-unit dual-well pumping unit according to any one of claims 1-3, characterized in that, The comprehensive evaluation index A is calculated based on the following model: Where: q1 and q2 are the current production rates of the two oil wells, respectively; Q1 and Q2 are the production rates of the two oil wells under commonly used operating parameters, respectively; w is the current comprehensive pumping efficiency of the two oil wells; Q1' and Q2' are the theoretical production rates of the two oil wells under the current operating parameters; a and b are weighting coefficients.

5. An intelligent control system for adjusting the production parameters of a dual-well pumping unit, used to implement the method described in any one of claims 1-4, characterized in that, At least including: Production volume metering device: installed at the wellheads of the two oil wells to measure the production volume of the two oil wells; Calculation, control and storage module: connected to the liquid production metering device, used to receive the liquid production data transmitted by the liquid production metering device, calculate the current comprehensive evaluation index through the comprehensive evaluation index calculation model, and output control signals according to the current comprehensive evaluation index; Variable frequency speed control device: connected between the computing control and storage module and the dual-well pumping unit system, used to receive control signals from the computing control and storage module and adjust the operating parameters of the dual-well pumping unit system according to the control signals.

6. The intelligent control system for adjusting the production parameters of a dual-well pumping unit according to claim 5, characterized in that: It also includes a display / control module, which is connected to the computing control and storage module, and is used to display the operating status parameters of the dual-well pumping unit.

7. The intelligent control system for adjusting the production parameters of a dual-well pumping unit according to claim 5 or 6, characterized in that, The computing control and storage module is a device that has at least the functions of signal reception and transmission, data processing and storage, and controlling external devices or systems according to preset programs or logic.

8. A terminal device, characterized in that, The terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the intelligent control method as described in any one of claims 1-4.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the intelligent control method as described in any one of claims 1-4.

10. The application of the intelligent control method for adjusting the production parameters of a single-unit dual-well pumping unit as described in any one of claims 1-4, or the intelligent control system for adjusting the production parameters of a single-unit dual-well pumping unit as described in any one of claims 5-7, in a beam-type single-unit dual-well pumping unit and a single-unit dual-well hydraulic pumping unit.

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