An intelligent interval opening control method, system and device of an oil extraction system and a storage medium

Abstract

The application discloses an intelligent intermittent control method, system and device of an oil production system and a storage medium, and comprises the following processes: S1, acquiring continuous production work diagram data of a current oil well; S2, judging whether the oil well reaches a steady state production through the continuous production work diagram data; S3, if the oil well reaches the steady state, calculating the pump efficiency of the oil well in the steady state, and issuing a pumping unit shutdown instruction when the calculated pump efficiency is less than or equal to a set minimum pump efficiency; and S4, calculating the change amount of the static load value when the liquid level height changes after the pumping unit is shutdown, and issuing a pumping unit startup instruction when the change amount of the static load value is greater than or equal to a set load change value. The method realizes real-time intelligent intermittent control according to the actual state of the oil well, and does not need additional manpower and material resources.

Description

Technical Field

[0001] This invention belongs to the field of oil well intermittent operation and relates to an intelligent intermittent operation control method, system, equipment and storage medium for oil production systems. Background Technology

[0002] Currently, Changqing Oilfield has achieved significant success in intermittent well operation, which has gradually become the norm. Intermittent well operation involves starting and stopping wells to achieve intermittent oil extraction. During the shutdown phase, the wells are allowed to recover to their optimal production state under natural conditions before production is restarted, achieving the goals of cost reduction, efficiency improvement, and energy conservation. However, current intermittent operation control methods always have some deviations in the selection and calculation of start-up and shutdown times, failing to achieve the true intermittent operation effect.

[0003] Scheduled start-up is currently the main method of intermittent well operation. The start and stop times for this method are mainly calculated based on manual experience or parameters such as well production. This method is labor-intensive, requires a lot of manual intervention, has low production efficiency, and the historical data used for calculation cannot provide real-time information on the well's status. Therefore, the intermittent operation effect is not obvious, and it cannot achieve true intelligent control.

[0004] Intermittent operation based on dynamic liquid level involves collecting dynamic liquid level values ​​and analyzing their recovery patterns. Production resumes when the dynamic liquid level is high and the machine stops to recover when the level drops. While this method possesses a degree of intelligence, it first requires investment in equipment for liquid level data acquisition. Secondly, the large intervals between dynamic liquid level data collections result in low real-time performance, hindering rapid production analysis and control. Although dynamic liquid level values ​​can be calculated based on data such as dynamometer cards, the dynamometer card displacement data is zero during shutdown periods, making dynamic liquid level calculation impossible during these times. Furthermore, the calculated dynamic liquid level has significant errors, resulting in less than ideal intermittent operation performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent intermittent control method, system, equipment and storage medium for oil production systems, so as to realize intermittent real-time intelligent control according to the actual state of the oil well, without the need for additional manpower and material resources.

[0006] To achieve the above objectives, the present invention employs the following technical solution: A method for intelligent intermittent control of an oil production system includes the following processes: S1, obtain the current oil well's continuous production dynamometer card data; S2, uses continuous production dynamometer data to determine whether an oil well has reached steady-state production; S3, if the oil well reaches a steady state, calculate the pump efficiency of the oil well under steady state. When the calculated pump efficiency is less than or equal to the set minimum pump efficiency, issue a pumping unit shutdown command. S4: After the pumping unit stops, calculate the change in static load value when the liquid level changes. When the change in static load value is greater than or equal to the set load change value, issue a pumping unit start command.

[0007] Preferably, in S2, the process of determining whether steady-state production has been achieved is as follows: obtain the number of dynamometer cards that have been continuously produced for more than a first set time, calculate the output and dynamometer card area corresponding to each dynamometer card, and calculate the average output and average dynamometer card area. When the changes in output and dynamometer card area are both less than or equal to the set fluctuation range value, the oil well reaches steady state.

[0008] Furthermore, the fluctuation range is set at 10%.

[0009] Furthermore, if the change in either production or working area exceeds the set fluctuation range, wait for the well to continue production for a second set time, and then make another judgment. After repeating the judgment for m rounds, if the condition is still not met, the well cannot reach a steady state.

[0010] Preferably, in S3, the minimum pump efficiency is set to 15%.

[0011] Preferably, in S4, the calculation process for the change in static load value is as follows: the fluid level height when the oil well is shut down is H0, the fluid level height after recovery is Hk, and the change in fluid level height is Δh = H0 - Hk; the change in static load value is... In the formula ρ is the liquid density; G is the gravitational constant; S is the annular area between the tubing and the sucker rod.

[0012] Furthermore, the load change value is calculated based on the set liquid level recovery height.

[0013] An intelligent intermittent control system for an oil production system includes: The dynamometer card data acquisition module is used to acquire the continuous production dynamometer card data of the current oil well; The steady-state judgment module is used to determine whether an oil well has reached steady-state production based on continuous production dynamometer data. The shutdown judgment module is used to calculate the pump efficiency of the oil well under steady state if the oil well reaches steady state, and to issue a pumping unit shutdown command when the calculated pump efficiency is less than or equal to the set minimum pump efficiency. The start-up judgment module is used to calculate the change in static load value when the liquid level changes after the pumping unit stops. The pumping unit start-up command is issued when the change in static load value is greater than or equal to the set load change value.

[0014] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the intelligent intermittent control method for the oil production system.

[0015] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the intelligent intermittent control method for the oil production system.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The intelligent intermittent control method for oil production systems described in this invention determines the shutdown time by collecting dynamometer cards to calculate pump efficiency during the start-up production period, and determines the start-up time by collecting load values ​​during the shutdown period. This achieves real-time intelligent intermittent control based on the actual state of the oil well, without requiring additional manpower or material resources. It effectively solves the current bottlenecks and problems encountered in intermittent control, achieving the goal of energy saving and efficiency improvement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the intelligent intermittent control method for oil production systems according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the oil well steady-state judgment process according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the calculation process for static load changes caused by oil well fluid level recovery according to an embodiment of the present invention. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terms “installation,” “connection,” and “linkage” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection, an electrical connection, or a connection that allows communication; a direct connection or an indirect connection via an intermediate medium; or a connection within two elements or an interaction between two elements. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] The intelligent intermittent control method for oil production systems described in this embodiment aims to solve the problem that existing intermittent control technologies cannot well match the production conditions of oil wells, resulting in unsatisfactory intermittent effects. The method includes the following steps: S1: Obtain the current oil well's continuous production dynamometer data.

[0024] S2 determines whether an oil well has reached steady-state production by using continuous production dynamometer data.

[0025] S3. If the oil well reaches a steady state, calculate the pump efficiency of the oil well under steady state. When the calculated pump efficiency is less than or equal to the set minimum pump efficiency, issue a pumping unit shutdown command.

[0026] S4: After the pumping unit stops, calculate the change in static load value when the liquid level changes. When the change in static load value is greater than or equal to the set load change value, issue a pumping unit start command.

[0027] like Figure 1 The diagram illustrates the specific process of the intelligent intermittent control method for oil production systems, which uses real-time calculation of well pump efficiency and upper stroke static load for start-stop control, as described in this embodiment. The method includes the following steps: Step 1: Obtain the current oil well's continuous production dynamometer data.

[0028] In this step, the dynamometer card (DDC) refers to the load-displacement relationship curve during pumping unit production. It reflects the operating status of the sucker rod and the surface power system. The DDC is the "health check report" of oil well production, reflecting the well's fullness, equipment operating status, and production efficiency. Continuous DDC provides a basis for production stability over time. Real-time data on load and displacement during pumping unit production are obtained through DDC measuring instruments to generate a DDC reflecting the production process.

[0029] Step 2: As Figure 2 As shown, it is determined whether the oil well has reached steady-state production. If it cannot reach steady-state, intermittent production will not be carried out.

[0030] Method for determining steady-state production: Obtain the number n of dynamometer cards for continuous production of 1 hour or more, and calculate the output Q corresponding to each dynamometer card. i Area S of the work diagram i Let i = 0, 1, ..., n, and calculate its average output Q. avg With average work area S avg .

[0031] when and (in the formula) When the set fluctuation range value (usually 10%) is met simultaneously, the oil well reaches a steady state. Otherwise, the well continues production for a time T (usually 2 hours), and the condition is checked again, for m rounds (m usually 3 times). If the condition is still not met, the oil well cannot reach a steady state.

[0032] In this step, steady-state production refers to stable well output and equipment operating status, with fluctuations within acceptable limits. Fluctuation amplitude refers to the percentage change in dynamometer card area and output, calculated by determining the output Q corresponding to continuous dynamometer cards. i Area S of the work diagram i and their average output Q avg With average work area S avgThe fluctuation range is determined to be less than 10%. Steady-state production indicates that the pumping unit is operating smoothly and producing a stable amount of fluid, making it suitable for intermittent operation. Fluctuations exceeding the threshold indicate unstable production, and intermittent operation may affect the normal operation of equipment and wells.

[0033] Step 3: If a steady state can be reached, calculate the pump efficiency of the oil well under steady-state conditions. .

[0034] In this step, pump efficiency refers to the efficiency with which the pumping unit pumps fluid from the bottom of the well to the surface, usually expressed as a percentage. Pump efficiency is calculated from dynamometer card data and is a crucial indicator for evaluating the well's production status and the pumping unit's operating efficiency. High pump efficiency indicates high fluid fill and good production status; low pump efficiency indicates insufficient fluid supply or pump failure. A decrease in pump efficiency to a certain threshold indicates the need to shut down the unit and wait for the fluid level to recover.

[0035] Step 4: When the pump efficiency is high Time (in the formula) (This is the set minimum pump efficiency). At this point, the oil well fill level drops to the set shutdown value. The brake is then controlled to stop the pumping unit at the upper stroke stage of the oil well, i.e., the pumping unit stops, and the oil well fluid level is allowed to recover.

[0036] In this step, the filling degree is the proportion of oil well fluid to the total volume of the pump chamber, which affects pump efficiency. A minimum pump efficiency threshold is typically set based on experience; below this value indicates insufficient liquid level. When pump efficiency drops below the set minimum, the system controls the pumping unit to stop operating and monitors liquid level recovery. Pump efficiency is closely related to pump fill rate; shutdown avoids dry pumping losses, improves production efficiency, and extends equipment life.

[0037] Step 5: When the pump efficiency... At that time, analysis and judgment Whether the setting is reasonable is generally determined by 15%. If the setting is too small, reset it and proceed to step four to recalculate.

[0038] In this step, pump efficiency is repeatedly calculated and analyzed to ensure that the set value can both avoid premature shutdowns that waste resources and prevent late shutdowns that could damage the equipment. Setting the minimum pump efficiency too high will lead to frequent shutdowns and affect production continuity; setting the minimum pump efficiency too low may increase equipment load and energy consumption.

[0039] Step 6: When the pump efficiency... At that time, and If configured properly, the oil well will be in good production condition and will not require interruption.

[0040] In this step, when production is going well, the well's pump efficiency is high and stable, indicating sufficient fluid supply and no need for interruption of production. The production status is analyzed based on pump efficiency and the set minimum pump efficiency to determine whether to continue production. Intermittent operation is unnecessary when pump efficiency is high; maintaining normal production maximizes fluid production efficiency.

[0041] Step 7: As Figure 3 As shown, after the oil well is shut down, the fluid level gradually recovers, and its static load value decreases as the fluid level recovers. .

[0042] Calculation of oil well shutdown load change: The fluid level height H0 at the time of shutdown of a specific oil well is Hk after recovery. Therefore, the change in fluid level height is Δh = H0 - Hk. The change reflected in the load (the change in static load value) is

[0043] In the formula : Liquid density; G: Gravitational constant; S: Annular area between tubing and sucker rod.

[0044] In this step, the fluid level change refers to the gradual recovery of the well fluid level after shutdown. The static load value change is the change in fluid level reflected on the load curve. The fluid level is measured by a fluid level monitoring device. Fluid level recovery reduces the static load value. By monitoring the static load change, it is determined whether the fluid level has reached the start-up standard.

[0045] Step 8: When Time (in the formula) (The set static load change value can be calculated based on the set liquid level recovery height). At this time, the oil well liquid level reaches the set start-up value, and the pumping unit is controlled to start production, entering the first step.

[0046] In this step, the start-up value is defined as the load change or liquid level height at which the liquid level recovers to meet production requirements. When the static load value reaches the set static load change value, the pumping unit is controlled to resume production. Reaching the start-up value indicates that the oil well has sufficient liquid storage, resulting in higher production efficiency and pump efficiency upon start-up.

[0047] Step 9: When If the well remains shut down, further analysis and judgment will be conducted. Whether the setting is reasonable is generally calculated based on a liquid level recovery height of 20m. If the setting is too large, reset it and proceed to step eight to recalculate.

[0048] In this step, the liquid level recovery height is the distance the liquid level recovers from its initial height after shutdown to the specified height. Determine if the set static load change value is appropriate. A set static load change value that is too large may waste time, while a set static load change value that is too small may result in insufficient pump efficiency upon startup. Properly adjusting the set static load change value is key to optimizing intermittent operation. If the set liquid level recovery height or static load change value is unreasonable, it needs to be reset and its effect verified.

[0049] In the above process, the following situations do not involve intermittent operations: Obtain the current continuous production dynamometer card data of the oil well and determine whether it has reached a steady state. If the change in oil well fluid volume and the change in dynamometer card area are greater than 10%, and a steady state has not been reached, then intermittent production will not be carried out.

[0050] Calculate the steady-state efficiency of oil well pumps ,when When, then judge Whether the setting is reasonable is generally determined by 15%. If the setting is too small, reset it. At that time, and If configured properly, the oil well will be in good production condition and will not require interruption.

[0051] After the oil well is shut down, the fluid level gradually recovers. By collecting the static load in real time, the change in static load value as the fluid level recovers is calculated. ,when If (F0 is generally calculated based on a liquid level recovery height of 20m), then the well remains shut down.

[0052] The following is an introduction to the actual implementation process of the above-mentioned intelligent intermittent control method for oil production systems, using the actual working process of an oil well as an example: (1) Taking the working parameters of a certain oil well as an example: the inner diameter of the tubing of the oil well is 62mm, the diameter of the sucker rod is 22mm, the density of crude oil is 0.8g / cm3, the dynamometer card acquisition interval is 10min, and the number of dynamometer cards for continuous production for 1 hour is 6. Its production, pump efficiency and dynamometer card area data are shown in the table below:

[0053] (2) Determine whether the oil well has reached a steady state and the fluctuation range. Take 10%:

[0054] (3) Satisfy and Therefore, the oil well has reached a steady state, and the current pump efficiency is... =10%.

[0055] (4) Set the minimum pump efficiency At this time, it is satisfied Control the brakes to stop the pumping unit in the upper stroke phase, and record the static load at the moment of stopping. =47.74kN.

[0056] (5) Set the load variation value (according to Calculations show that a 1 kN change in static load corresponds to a liquid level change of approximately 50 m. Therefore, a 20 m recovery of the liquid level corresponds to a static load change of 0.4 kN. Static load values ​​are collected in real-time after shutdown. As the page recovers, its static load value gradually decreases; the static load change is calculated. .

[0057] (6) The minimum static load variation of the well is 47.25 kN, and the static load when it tends to stabilize is 47.3 kN, which satisfies the condition. Therefore, when the static load of the oil well drops to 47.3kN, the pumping unit is controlled to start production.

[0058] The following are embodiments of the apparatus of the present invention, which can be used to execute embodiments of the method of the present invention. For details not omitted in the apparatus embodiments, please refer to the embodiments of the method of the present invention.

[0059] In another embodiment of the present invention, an intelligent intermittent control system for an oil production system is provided. This intelligent intermittent control system can be used to implement the above-mentioned intelligent intermittent control method for an oil production system. Specifically, the intelligent intermittent control system for an oil production system includes a dynamometer card data acquisition module, a steady-state judgment module, a shutdown judgment module, and a startup judgment module.

[0060] The dynamometer data acquisition module is used to acquire the continuous production dynamometer data of the current oil well.

[0061] The steady-state judgment module is used to determine whether an oil well has reached steady-state production based on continuous production dynamometer data.

[0062] The shutdown judgment module is used to calculate the pump efficiency of the oil well under steady state if the oil well reaches steady state. When the calculated pump efficiency is less than or equal to the set minimum pump efficiency, a shutdown command for the pumping unit is issued.

[0063] The start-up judgment module is used to calculate the change in static load value when the liquid level changes after the pumping unit stops. It issues a pumping unit start-up command when the change in static load value is greater than or equal to the set load change value.

[0064] In another embodiment of the present invention, a terminal device is provided, comprising a processor and a memory. The memory stores a computer program, the computer program including program instructions, and the processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), or field-programmable gate arrays (FPGAs). Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., are the computing and control core of the terminal. They are suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions to realize the corresponding method flow or corresponding function. The processor described in this embodiment of the invention can be used for the operation of the intelligent intermittent control method of the oil production system, including: S1, acquiring the current continuous production dynamometer data of the oil well; S2, determining whether the oil well has reached steady-state production based on the continuous production dynamometer data; S3, if the oil well has reached steady state, calculating the pump efficiency of the oil well under steady state, and issuing a pumping unit shutdown command when the calculated pump efficiency is less than or equal to the set minimum pump efficiency; S4, after the pumping unit is shut down, calculating the change in static load value when the liquid level changes, and issuing a pumping unit start command when the change in static load value is greater than or equal to the set load change value.

[0065] In another embodiment, the present invention also provides a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understood that the computer-readable storage medium here may include both the built-in storage medium in the terminal device and extended storage media supported by the terminal device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor, which may be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here may be high-speed RAM or non-volatile memory, such as at least one disk storage device.

[0066] One or more instructions stored in a computer-readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the intelligent intermittent control method for the oil production system in the above embodiments; one or more instructions in the computer-readable storage medium are loaded and executed by the processor in the following steps: S1, obtain the current continuous production dynamometer data of the oil well; S2, determine whether the oil well has reached steady-state production based on the continuous production dynamometer data; S3, if the oil well has reached steady state, calculate the pump efficiency of the oil well under steady state, and issue a pumping unit shutdown command when the calculated pump efficiency is less than or equal to the set minimum pump efficiency; S4, after the pumping unit is shut down, calculate the change in static load value when the liquid level changes, and issue a pumping unit start command when the change in static load value is greater than or equal to the set load change value.

[0067] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0071] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0072] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0074] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0075] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

[0076] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A method for intelligent intermittent control of an oil production system, characterized in that, Includes the following processes: S1, obtain the current oil well's continuous production dynamometer card data; S2, uses continuous production dynamometer data to determine whether an oil well has reached steady-state production; S3, if the oil well reaches a steady state, calculate the pump efficiency of the oil well under steady state. When the calculated pump efficiency is less than or equal to the set minimum pump efficiency, issue a pumping unit shutdown command. S4: After the pumping unit stops, calculate the change in static load value when the liquid level changes. When the change in static load value is greater than or equal to the set load change value, issue a pumping unit start command.

2. The intelligent intermittent control method for oil production systems according to claim 1, characterized in that, In S2, the process of determining whether steady-state production has been achieved is as follows: obtain the number of dynamometer cards that have been in continuous production for more than a first set time, calculate the output and dynamometer card area corresponding to each dynamometer card, and calculate the average output and average dynamometer card area. When the changes in output and dynamometer card area are both less than or equal to the set fluctuation range value, the oil well reaches steady state.

3. The intelligent intermittent control method for oil production systems according to claim 2, characterized in that, Set the fluctuation range value to 10%.

4. The intelligent intermittent control method for oil production systems according to claim 2, characterized in that, If the change in either production or working area exceeds the set fluctuation range, wait for the well to continue production for a second set time, and then make another judgment. Repeat this judgment for m rounds. If the condition is still not met, the well cannot reach a steady state.

5. The intelligent intermittent control method for oil production systems according to claim 1, characterized in that, In S3, the minimum pump efficiency is set to 15%.

6. The intelligent intermittent control method for oil production systems according to claim 1, characterized in that, In S4, the calculation process for the change in static load value is as follows: the fluid level height when the well is shut down is H0, the fluid level height after recovery is Hk, and the change in fluid level height is Δh = H0 - Hk; the change in static load value is... In the formula ρ is the liquid density; G is the gravitational constant; S is the annular area between the tubing and the sucker rod.

7. The intelligent intermittent control method for oil production systems according to claim 6, characterized in that, The set load change value is calculated based on the set liquid level recovery height.

8. An intelligent intermittent control system for an oil production system, characterized in that, include: The dynamometer card data acquisition module is used to acquire the continuous production dynamometer card data of the current oil well; The steady-state judgment module is used to determine whether an oil well has reached steady-state production based on continuous production dynamometer data. The shutdown judgment module is used to calculate the pump efficiency of the oil well under steady state if the oil well reaches steady state, and to issue a pumping unit shutdown command when the calculated pump efficiency is less than or equal to the set minimum pump efficiency. The start-up judgment module is used to calculate the change in static load value when the liquid level changes after the pumping unit stops. The pumping unit start-up command is issued when the change in static load value is greater than or equal to the set load change value.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the intelligent intermittent control method for the oil production system as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the intelligent intermittent control method for the oil production system as described in any one of claims 1 to 7.

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