A gas well plunger gas lift control system

Abstract

The present invention discloses a gas well plunger gas lift control system, which belongs to the field of oil and gas field development and gas well drainage and gas production. The control system includes eight modules: system access and conversion, production data preprocessing, wellbore liquid accumulation status analysis, comprehensive analysis of gas well production status, production system fine-tuning, gas well production history fine-tuning, exception processing and optimization system execution. The gas well production history fine-tuning analysis module includes three sub-modules: production history fitting, production prediction and optimal production system analysis. A plunger gas lift control system is developed based on parameter fitting analysis of gas well oil-casing pressure, cumulative gas production, oil casing size and other parameters during plunger liquid lift cycle operation, real-time wellbore liquid accumulation changes, reservoir two-phase seepage and gas production, and liquid production energy supply status. Combined with the gas well oil-casing pressure difference, plunger operation load coefficient, and safe well shut-in casing pressure, the plunger gas lift control system is aimed at stable gas well production, optimal gas production, and optimal liquid production, thereby realizing intelligent optimization parameter adjustment and efficient and fine operation of plunger gas lift drainage and gas production technology.

Description

Technical Field

[0001] The invention belongs to the field of oil and gas field development and gas well drainage and gas production, and particularly relates to a gas well plunger gas lift control system. Background Art

[0002] Plunger gas lift is a highly efficient drainage and gas production method. A plunger device is installed on the gas well. The plunger forms a mechanical isolation interface between the lifted gas and liquid in the wellbore, and liquid is discharged under the push of the gas well energy. It can effectively reduce and prevent slippage loss between the lifted gas and liquid, and achieve the purpose of efficient drainage. Plunger gas lift technology has the characteristics of high drainage efficiency, wide application range, low cost, and green environmental protection. It is widely used in low-pressure, low-yield, and small-water-volume gas wells. It is the most economical and effective drainage and gas production technology for tight gas reservoirs.

[0003] Plunger lift is an intermittent well opening and closing process divided into three stages. The first stage is the shut-in process. After the gas well is shut in, the plunger falls to the bottomhole stopper under the action of gravity. The well continues to be shut in, and the gas well energy is restored until the wellbore liquid is lifted. The second stage is the plunger lift rise phase. When the gas well energy reaches the liquid lifting condition, the well is opened. The plunger is pushed by the gas well energy to discharge the accumulated liquid in the wellbore. The third stage is the well opening and flow phase. After the plunger discharges the accumulated liquid in the wellbore, in order to pursue higher gas production, it will not directly enter the shut-in phase. The gas well will continue to produce until liquid accumulation begins, and then it will be shut in. The plunger lift process is controlled and managed by the plunger controller. The controller executes the written control method. After manually setting parameters at runtime, the controller executes the well opening and closing according to the set results. Commonly used control methods include timed well switching and pressure control mode. The timed well switching sets a shut-in time and a well opening time. The shut-in time includes the plunger falling and the gas well energy recovery process, and the well opening time includes the plunger lifting liquid rising and the continuous gas production process. The principle of this method is simple and easy to operate. It is the main control method for the application of plunger gas lift technology in gas fields; the pressure control mode sets the gas well opening pressure. When the shut-in pressure returns to the set value, the gas well is opened. When production reaches the point where liquid accumulates in the gas well, the oil-casing pressure difference increases or the casing pressure rises, the well is shut-in by the set pressure difference or casing pressure increase value. The well is switched on and off by the change in pressure. This method is one of the important methods for controlling plunger gas lift technology.

[0004] The current method of timing well opening and closing and pressure control is simple, but requires manual analysis and optimization of parameters based on changes in gas well production energy during operation. If optimization is not timely or the analysis is inaccurate, wellbore fluid accumulation will be difficult to drain, and the plunger gas lift technology will fail. Currently, plunger gas lift operations rely on manual analysis, control, optimization, and parameter adjustment. When the number of wells is small and the operator is experienced, stable gas well production can be ensured. Based on field application analysis, with extensive operator experience and remote control capabilities, an average of approximately 30 plunger gas lift wells can be guaranteed to operate normally. However, as the number of wells increases, parameter adjustment becomes more difficult.

[0005] Tight gas reservoirs and shale gas wells are generally characterized by low pressure, low production, and small water volume. These production characteristics are suitable for the application of plunger gas lift drainage and gas production technology. In 2013, the technology research and development and application achieved remarkable results. As of now, the technology has been applied to more than 4,000 gas field wells. As the number of applied wells increases, the optimization and parameter adjustment of the plunger gas lift operation system becomes more difficult. The number of controlled wells exceeds the workload of manual analysis and parameter adjustment management, and the operation system cannot be optimized in a timely and accurate manner. In addition, the job mobility of technical personnel makes it impossible to solidify technical management experience, affecting the accuracy and speed of parameter adjustment analysis. Summary of the Invention

[0006] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a gas well plunger gas lift control system, which has solved the problems of large workload and low efficiency of manual control and parameter adjustment in the application of gas well plunger gas lift drainage and gas production technology in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention discloses a gas well plunger gas lift control system, comprising: a system access and conversion module, a production data processing module, a wellbore liquid accumulation status analysis module, a gas well production status comprehensive analysis module, a production system fine-tuning module, a gas well production history detailed analysis module, an abnormality processing module, and an optimized system execution module;

[0009] The system access and conversion module transmits the data imported from the external database to the production data processing module. The production data processing module transmits the extracted and sorted data to the wellbore liquid accumulation status analysis module. The wellbore liquid accumulation status analysis module transmits the analyzed wellbore liquid accumulation data and plunger status to the gas well production status comprehensive analysis module. The gas well production status comprehensive analysis module transmits the data to the production system fine-tuning module, the gas well production history fine-analysis module and the exception handling module according to the gas well production status. The production system fine-tuning module transmits the determined operating system to the optimization system execution module for execution. The gas well production history fine-analysis module transmits the selected optimal operating plan to the optimization system execution module for execution. The exception handling module re-enters the system after manual plan adjustment.

[0010] Preferably, the gas well production history detailed analysis module includes: a production history matching submodule, a production prediction submodule and an optimal production system submodule; the production history matching submodule, the production prediction submodule and the optimal production system submodule are connected in sequence to perform a detailed analysis of the gas well, and the optimal production system submodule transmits the screened optimal operation plan to the optimization system execution module for execution.

[0011] Preferably, the production history fitting submodule is used to fit the plunger gas lift wellbore liquid accumulation and plunger operation status; the production prediction submodule is used to analyze the gas supply capacity and liquid supply capacity of the formation, evaluate the formation energy, and analyze the current two-phase flow state and drainage capacity of the wellbore; the optimal production system submodule is used to generate different plunger gas lift schemes based on the analysis results of the production history fitting submodule and the production prediction submodule, and use three indicators such as the shut-in oil-casing pressure difference, load coefficient and safe shut-in casing pressure to analyze the wellbore liquid accumulation, oil-casing pressure change relationship, gas production and water production corresponding to different schemes, and finally screen out the optimal operation scheme.

[0012] Preferably, the data accessed by the system access and conversion module include parameters such as original formation pressure, formation temperature, casing inner diameter, tubing inner diameter, cumulative gas production, gas production index, production oil and casing pressure, and fluid PTV.

[0013] Preferably, the production data processing module is used to convert the production data into a plunger gas lift analysis format.

[0014] Preferably, the wellbore fluid accumulation status analysis module is used to analyze the wellbore fluid accumulation status, wellbore fluid accumulation volume, wellbore periodic discharge volume, annular space fluid accumulation height and oil pipe fluid accumulation height and transmit them to the gas well production status comprehensive analysis module.

[0015] Preferably, the gas well production status comprehensive analysis module evaluates the gas well production status according to the gas well bore periodic liquid accumulation volume, pressure recovery capacity and effective cycle number, and divides the gas well production status into three categories: good, poor and abnormal.

[0016] Preferably, for a good operating state, the operating state is maintained or fine-tuned, and the production system fine-tuning module is entered; for a poor operating state, a fine optimization analysis is performed, and the gas well production history fine analysis module is entered; for an abnormal condition, the abnormality handling module is entered.

[0017] Preferably, the production system fine-tuning module is used to maintain the current plunger gas lift production system, or fine-tune the well opening and closing time according to the liquid accumulation in the gas well, and push the determined operation system to the optimization system execution module for execution.

[0018] Preferably, the optimization system execution module is used to execute the optimization system, complete the plunger gas lift intelligent optimization cycle, and then regularly perform intelligent optimization cycle analysis on the gas well every 2-10 days.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention discloses a gas well plunger lift control system. This system utilizes a system access and conversion module, a production data preprocessing module, a wellbore liquid loading status analysis module, a comprehensive gas well production status analysis module, a production system fine-tuning module, a gas well production history detailed analysis module, an exception handling module, and an optimized system execution module to establish a reservoir geological model and a wellbore liquid loading identification model. Combined with plunger lift cycle production data, this system calculates gas well gas production, liquid production, and liquid loading conditions. This system accurately formulates a plunger lift operating system and automatically optimizes the operating system based on changes in gas well production capacity and liquid loading conditions, ensuring real-time effectiveness. The system uses a computer to replace manual analysis of gas well and plunger operating conditions, effectively reducing the workload of plunger lift well control and management, saving both manpower and material resources, while also eliminating technical management issues caused by technician job transfers. Furthermore, this intelligent control system analyzes gas well reservoir energy and wellbore liquid loading conditions, formulating a more scientific and accurate plunger operating system that ensures stable gas well production. This system is of great significance for the application of plunger lift technology in tight gas reservoirs and shale gas. It is beneficial to stabilize gas well production, achieve optimal gas production and optimal liquid production, and ultimately realize intelligent optimization and parameter adjustment and efficient and refined operation of plunger gas lift drainage and gas production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a functional flow chart of the plunger gas lift intelligent control system of the present invention;

[0022] Figure 2 This is a functional schematic diagram of the plunger gas lift fine analysis module of the present invention;

[0023] Figure 3 This is a graph of wellhead production data for the plunger gas lift multi-cycle mechanism test of the present invention;

[0024] Figure 4 It is a single-cycle data feature graph extracted from the simulation results of the present invention;

[0025] Figure 5 is the position change curve of the plunger during the upward movement of the present invention;

[0026] Figure 6 The speed change curve of the plunger during the upward movement of the present invention;

[0027] Figure 7 is the acceleration change curve of the plunger during the upward movement of the present invention;

[0028] Figure 8 The position change curve of the plunger during the downward movement of the present invention;

[0029] Figure 9 The speed change curve of the plunger during the downward movement of the present invention;

[0030] Figure 10is the acceleration change curve of the plunger during the downward movement of the present invention;

[0031] Figure 11 A diagram showing the change in height of the liquid column above the plunger of the present invention;

[0032] Figure 12 This is a diagram showing the height change of the liquid column below the plunger of the present invention;

[0033] Figure 13 This is a graph showing the height variation of the annular liquid column of the present invention;

[0034] Figure 14 This is a two-phase production change diagram at the wellhead of the present invention;

[0035] Figure 15 This is a diagram of the two-phase inflow changes in the formation of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions 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 embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] The present invention is described in further detail below with reference to the accompanying drawings:

[0039] Reference Figure 1 、 Figure 2 The present invention is further described:

[0040] In order to solve the problems of high labor intensity, poor accuracy and slow speed of manual optimization and adjustment of plunger gas lift, the present invention provides a Figure 1 and Figure 2The plunger gas lift control system shown in the figure includes eight main modules, namely, a system access and conversion module, a production data preprocessing module, a wellbore liquid loading status analysis module, a gas well production status comprehensive analysis module, a production system fine-tuning module, a gas well production history detailed analysis module, an exception handling module, and an optimized system execution module. Among them, the gas well production history detailed analysis module includes three submodules, namely, a production history fitting submodule, a production prediction submodule, and an optimal production system submodule.

[0041] When the present invention is running, the system access and conversion module first imports the data required for intelligent optimization. The access data includes parameters such as original formation pressure, formation temperature, casing inner diameter, tubing inner diameter, cumulative gas production, gas production index, production oil casing pressure, fluid PTV, etc., confirms the data accuracy and unit magnitude relationship, and then transmits the data to the production data preprocessing module.

[0042] The production data processing module then converts the production data into the format required for plunger gas lift analysis, such as converting the continuous minute production data of the plunger gas lift process into the data of the plunger gas lift cycle operation. At the same time, it processes missing and abnormal data, extracts production characteristics such as the opening and closing time of each cycle, the opening well oil and casing pressure, and the closing well oil and casing pressure, and transmits the extracted and organized data to the wellbore periodic liquid accumulation status analysis module.

[0043] The wellbore periodic liquid accumulation status analysis module organizes data based on the production data processing module. Combined with the cyclic operation status of the plunger gas lift, it uses the Pareto optimal solution set and Bayesian structure to fit the production history of the model. The algorithm analyzes the wellbore liquid accumulation status, wellbore liquid accumulation volume, wellbore periodic discharge volume, annular liquid accumulation height, and tubing liquid accumulation height. The analyzed wellbore liquid accumulation data and plunger status are transmitted to the comprehensive analysis module of gas well production status.

[0044] The comprehensive analysis module of gas well production status will evaluate the production status of gas wells based on the periodic liquid accumulation volume of gas wellbore, pressure recovery capacity and effective cycle number, and divide them into three categories: good, poor and abnormal. Then, the production system optimization method will be selected according to the production status classification. For good status, the operation status will be maintained or fine-tuned, and the module will enter the production system fine-tuning module. For poor operation status, a detailed optimization analysis will be performed, and the module will enter the gas well production history detailed analysis module. For abnormal conditions, the module will enter the abnormality handling module.

[0045] For gas wells that enter the production system fine-tuning module, since the gas wells are in good production condition, the current plunger gas lift production system is maintained, or the well opening and closing time is fine-tuned according to the liquid accumulation in the gas wells. The determined operating system is pushed to the optimization system execution module. The optimization system execution module executes the optimization system and completes the plunger gas lift intelligent optimization cycle. After that, the gas wells are regularly analyzed for intelligent optimization cycles every 2-10 days.

[0046] For gas wells that enter the gas well production history fine analysis module, the gas well system operation is not appropriate. According to the data sorting module, the production data processing module organizes the data and performs fine analysis on the gas wells in the production history fitting submodule, production prediction submodule and optimal production system submodule respectively.

[0047] The production history matching submodule fits the plunger gas lift wellbore liquid accumulation and plunger operation status.

[0048] The production prediction submodule analyzes the gas and liquid supply capabilities of the formation, evaluates the formation energy, and analyzes the current two-phase flow state and drainage capacity of the wellbore.

[0049] The optimal production system submodule generates different plunger gas lift schemes based on the analysis results of the production history fitting submodule and the production prediction submodule. It uses three indicators, including the shut-in oil-casing pressure difference, load coefficient, and safe shut-in casing pressure, to analyze the wellbore liquid accumulation, oil-casing pressure change relationship, gas production, and water production corresponding to different schemes. Finally, the optimal operation scheme is screened out and pushed to the optimization system execution module for execution, completing the intelligent optimization analysis cycle of the gas well plunger gas lift system. After that, the gas well is regularly optimized again every 2-10 days.

[0050] For gas wells entering the abnormal processing module, due to abnormal oil and casing pressure data of the gas well, device failure or missing important analysis data, the system algorithm cannot complete the work of fitting the production history of the gas production well and optimizing the plunger gas lift plan. The abnormal characteristics of the production well will be analyzed, and the cause of the failure will be analyzed manually for plan adjustment and troubleshooting. After the problem is confirmed to be solved, it will enter the intelligent optimization cycle system.

[0051] The operation process is:

[0052] Step 1: Collect the recent oil pressure, casing pressure and well opening and closing status data of the target gas well;

[0053] Step 2: Import the original formation parameters, fluid PTV parameters, wellbore structure and other parameters of the target gas well;

[0054] Step 3: Using a multi-objective optimization algorithm (NSGA III algorithm), with oil pressure and casing pressure as evaluation objects, automatically search for the optimal values ​​of the design parameters based on the production history;

[0055] Step 4: After obtaining the optimal parameter group for production history fitting, calculate the oil pressure, casing pressure, and wellbore liquid loading status of each scheme in the future period based on the n groups of different predicted plunger gas lift schemes automatically generated.

[0056] Step 5: Analyze and statistically analyze the safety, gas and liquid production performance of each prediction scheme. Combined with the screening criteria of the optimal production system, the prediction scheme suitable for the target well is automatically selected, including the optimal spacing scheme for three different production objectives: long-term safe and stable production, optimal liquid drainage, and optimal gas production.

[0057] Step 6: Use the default production mode (i.e., long-term safe and stable production) or the user-selected production mode to determine the only production plan, which is transmitted to the control module through the network to adjust the wellhead production system;

[0058] Step 7: Wait 2-15 days and repeat steps 1 to 6.

[0059] Example 1:

[0060] Reference Figures 3 to 15 The embodiments of the present invention are further described:

[0061] Based on the gas well production data and wellbore structure data, the plunger gas lift control system parameters are shown in Table 1.

[0062] Table 1 Parameters for multi-cycle simulation of plunger gas lift

[0063]

[0064]

[0065] The plunger gas lift operation cycle of the example well is simulated based on the system access and conversion module, production data processing module, wellbore liquid loading status analysis module, and production history fine analysis module. The simulation results are shown in the figure. Figures 3 to 15 shown.

[0066] Figure 3 The results show that the constructed plunger gas lift multi-cycle simulation program can well characterize the production characteristics of plunger wells, and the relationship between the plunger gas lift oil and casing pressure curve and the open-tubing well system is consistent with the actual plunger gas lift operation curve.

[0067] Figures 4 to 15 The accuracy of the simulation is demonstrated from multiple dimensions, including plunger movement cycle, plunger movement data, wellbore liquid column height, and wellhead and formation two-phase production.

[0068] (1) Plunger movement cycle

[0069] Figure 4 The single-cycle plunger motion process and transition nodes can be identified from the casing pressure data, including:

[0070] 1) Well opening stage - gas column ascending: ① to ②;

[0071] 2) Well opening stage—liquid column upward: ② to ③;

[0072] 3) Well opening stage - continued flow: ③ to ④;

[0073] 4) Shut-in stage—gas column descends, liquid column descends, and the retainer stays: ④ to ⑤.

[0074] (2) Plunger movement data

[0075] During the well opening stage, the plunger is divided into two sub-processes: gas column upward and liquid column upward. The plunger motion curve analyzes the plunger position during the process. Figure 5 , speed as Figure 6 and acceleration as Figure 7 , the specific changes in these three aspects.

[0076] During the shut-in phase, the plunger is divided into two sub-processes: the gas column descending and the liquid column descending. The plunger position in the plunger downward movement is also analyzed. Figure 8 , speed as Figure 9 and acceleration as Figure 10 Changes in three aspects.

[0077] (three), Figure 11 、 Figure 12 、 Figure 13 The height change characteristics of the wellbore liquid column during the plunger lifting cycle are specifically divided into the height change of the liquid column above the plunger, the height change of the liquid column below the plunger, and the change law of the liquid column in the casing annulus.

[0078] (Four), Figure 14 、 Figure 15 This is the change pattern of two-phase production at the wellhead and two-phase inflow into the formation during the plunger lift cycle.

[0079] Figures 4 to 15 The simulation program tracking parameters displayed from four dimensions, including plunger movement cycle, plunger movement data, wellbore liquid column height, and wellhead and formation two-phase production, can accurately characterize the production characteristics of the plunger gas lift well, reflect the changing laws of wellbore and formation energy, clarify the plunger movement status at different stages, and quantitatively describe the detailed information of all dimensions of the formation and wellbore of the plunger gas lift well, verifying the accuracy and effectiveness of the established multi-cycle plunger gas lift model.

[0080] Example 2:

[0081] 50 plunger gas lift wells with different production conditions were selected, including different types of gas wells such as normal operation, liquid accumulation, and poor data, i.e. discontinuous data, and abnormal data points. The plunger gas lift control system was applied. The analysis results are shown in Table 2. The content in the table is taken from the analysis data on April 24, 2021. It can be seen that only one well failed in the intelligent control test, and the success rate is high. According to the production status of the gas well, the plunger gas lift operation system can be recommended based on stable production and optimal gas production to meet the intelligent control requirements of plunger gas lift in the gas field.

[0082] Table 2 Execution results of plunger gas lift intelligent control algorithm

[0083]

[0084]

[0085]

[0086]

[0087] The test results of 50 wells show that the system can adapt to the production analysis and drainage process optimization of most plunger gas wells from the production performance of each well. It objectively proves the accuracy, stability, universality and robustness of the plunger gas lift control system. The system is suitable for the large-scale application standards of plunger gas lift wells.

[0088] The system has been promoted and applied in 1,100 plunger gas lift wells with obvious application effects. The application of the technology will be further expanded in the next step. At the same time, with the development of domestic tight gas reservoirs and shale gas, the number of plunger gas lift technology wells will increase rapidly in the future. The control system can be promoted and applied, and its application prospects are broad.

[0089] In summary, the purpose of the present invention is to solve the problems of large workload and low efficiency in manual control parameter adjustment in the application of gas well plunger lift drainage gas production technology. A plunger lift control system is designed and developed to analyze the real-time changes in wellbore liquid accumulation, reservoir two-phase seepage and gas production, and liquid production energy supply during plunger lift cycle operation based on parameter fitting analysis such as gas well oil-casing pressure, cumulative gas production, and oil casing size. Combined with the gas well oil-casing pressure difference, plunger operation load coefficient, and safe well shut-in casing pressure, the plunger lift control system aims at stable production of gas wells, optimal gas production, and optimal liquid production, thereby realizing intelligent optimization parameter adjustment and efficient and refined operation of plunger lift drainage gas production technology. The system includes 8 modules: system access and conversion, production data preprocessing, wellbore liquid accumulation status analysis, comprehensive analysis of gas well production status, production system fine-tuning, gas well production history fine analysis, exception handling, and optimization system execution. Among them, the gas well production history fine analysis module includes 3 sub-modules: production history fitting, production prediction, and optimal production system analysis.

[0090] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A gas well plunger gas lift control system, characterized in that: include: System access and conversion module, production data processing module, wellbore liquid loading status analysis module, gas well production status comprehensive analysis module, production system fine-tuning module, gas well production history detailed analysis module, exception handling module and optimization system execution module; The gas well production history detailed analysis module includes: production history matching submodule, which is used to fit the plunger gas lift wellbore liquid accumulation and plunger operation status; The production prediction submodule is used to analyze the gas and liquid supply capabilities of the formation, assess formation energy, and analyze the current two-phase flow pattern and drainage capacity of the wellbore. The optimal production system submodule is used to generate different plunger gas lift schemes based on the analysis results of the production history fitting submodule and the production prediction submodule. Three indicators, including the shut-in oil-casing pressure difference, load factor, and safe shut-in casing pressure, are used to analyze the corresponding wellbore liquid accumulation, oil-casing pressure change relationship, gas production, and water production corresponding to different schemes, and ultimately select the optimal operation scheme. The system access and conversion module transmits the data imported from the external database to the production data processing module. The production data processing module transmits the extracted and sorted data to the wellbore liquid accumulation status analysis module. The wellbore liquid accumulation status analysis module transmits the analyzed wellbore liquid accumulation data and plunger status to the gas well production status comprehensive analysis module. The gas well production status comprehensive analysis module transmits the data to the production system fine-tuning module, the gas well production history fine-analysis module and the exception handling module according to the gas well production status. The production system fine-tuning module transmits the determined operating system to the optimization system execution module for execution. The gas well production history fine-analysis module transmits the selected optimal operating plan to the optimization system execution module for execution. The exception handling module re-enters the system after manual plan adjustment.

2. A gas well plunger gas lift control system according to claim 1, characterized in that: The production history matching submodule, production prediction submodule and optimal production system submodule are connected in sequence to perform detailed analysis on the gas wells. The optimal production system submodule transmits the selected optimal operation plan to the optimization system execution module for execution.

3. A gas well plunger gas lift control system according to claim 1, characterized in that: The system access and conversion module access data include original formation pressure, formation temperature, casing inner diameter, tubing inner diameter, cumulative gas production, gas production index, production oil casing pressure and fluid PTV parameters.

4. A gas well plunger gas lift control system according to claim 1, characterized in that: The production data processing module is used to convert the production data into a plunger gas lift analysis format.

5. A gas well plunger gas lift control system according to claim 1, characterized in that: The wellbore liquid accumulation state analysis module is used to analyze the wellbore liquid accumulation state, wellbore liquid accumulation volume, wellbore periodic discharge volume, annular space liquid accumulation height and oil pipe liquid accumulation height and transmit them to the gas well production state comprehensive analysis module.

6. A gas well plunger gas lift control system according to claim 1, characterized in that: The gas well production status comprehensive analysis module evaluates the gas well production status according to the gas well bore periodic liquid accumulation volume, pressure recovery capacity and effective cycle number, and divides the gas well production status into three categories: good, poor and abnormal.

7. A gas well plunger gas lift control system according to claim 6, characterized in that: For those in good operating condition, the system will maintain the operating condition or make fine adjustments by entering the production system fine-tuning module. For those in poor operating condition, the system will conduct fine optimization analysis by entering the gas well production history fine analysis module. For abnormal conditions, the system will enter the abnormality handling module.

8. A gas well plunger gas lift control system according to claim 1, characterized in that: The production system fine-tuning module is used to maintain the current plunger gas lift production system, or fine-tune the opening and closing time of the well according to the liquid accumulation in the gas well, and push the determined operation system to the optimization system execution module for execution.

9. A gas well plunger gas lift control system according to claim 1, characterized in that: The optimization system execution module is used to execute the optimization system and complete the plunger gas lift intelligent optimization cycle. Thereafter, the intelligent optimization cycle analysis of the gas well is regularly performed every 2-10 days.

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