Production well control method, system and equipment based on double load values and medium

Abstract

The invention relates to the field of offshore oil and gas collection, and provides a production well control method, system and equipment based on double load values and a medium. The production well control method comprises the steps that initial production data of a production well is obtained, the drainage height is calculated through the initial production data, a production plunger falls down from the initial position, and in-well environment data is collected; the height of the gas column is calculated, a well temperature correction value is calculated, the height of the gas column is corrected through the well temperature correction value, and the height of the target gas column is obtained; acquiring acceleration in the liquid, judging the liquid state according to the acceleration in the liquid, and calculating the liquid depth; distance judgment parameters are calculated through the liquid depth and the drainage height, and expansion of the production plunger is controlled; collecting well shut-in production data, calculating a first load value, executing a well opening command according to the first load value, returning the production plunger to the initial position, collecting well opening production data, calculating a second load value, and executing a well shut-in command according to the second load value. The method effectively improves the yield of the production well.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore oil and gas production, and particularly to a production well control method, system, equipment and medium based on dual load values. Background Art

[0002] The intermittent production well technology is one of the common means to increase production in the process of offshore oil and gas exploitation. In the drainage gas production process based on intermittent production wells, there are usually four steps, namely the flowing production stage, the plunger downward stage, the shut-in well pressure build-up stage, and the plunger upward stage. The change of the wellhead state in the above four steps is completed by the on-off state change of the manual needle valve or electric needle valve at the wellhead. The switching cycle of the surface needle valve determines the working time of each step of the overall drainage gas production process. The opening time of the well determines the flowing production and the plunger upward stage, and the shut-in time determines the plunger downward and the shut-in well pressure build-up stage. The interaction and influence of the switching well time and duration together determine the final production of the oil and gas well. Therefore, according to the change of different physical quantities in the well, completing the adaptive adjustment of the switching well time and duration is the key factor to maximize the production of the oil and gas well.

[0003] Among them, the shut-in well timing and the shut-in well duration are usually selected as fixed values according to the historical production curve of the oil and gas well. As the production time continues, the pressure of the oil and gas well decreases. For low-pressure production wells, the fixed switching well time cannot adapt to the changing production state of the gas well. In addition, during the exploitation process in the offshore environment, seawater and salts may also enter the formation. Moreover, as the exploitation time extends, the water content in the formation will also continuously increase, which will cause changes in the liquid state, thus affecting the control process of the production plunger. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. For this purpose, the present invention provides a production well control method, system, equipment and medium based on dual load values to realize the automatic control of the switching well timing of the production well and the expansion of the production plunger.

[0005] The present invention provides a production well control method based on dual load values, including: S1: Determine a production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, let the production plunger fall into the production well from the initial position, and collect the well environment data; S2: Calculate the target gas column height according to the well environment data; S3: Obtain the acceleration in the liquid, judge the liquid state according to the acceleration in the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; S4: Calculate the distance judgment parameter based on the liquid depth and the drainage height, and control the expansion of the production plunger based on the distance judgment parameter and the target gas column height; S5: Collect the shut-in production data, calculate the first load value based on the shut-in production data, execute the well-opening command according to the first load value, and make the production plunger return to the initial position. Collect the well-opening production data, calculate the second load value based on the well-opening production data, and execute the well-shut-in command according to the second load value. Control the production of the production well through the well-opening command and the well-shut-in command.

[0006] For the production well control method based on double load values provided by the present invention, step S1 specifically includes: S11: Determine the production well, make the production plunger execute the production cycle, and obtain the initial production data including the original casing pressure, the original tubing pressure, and the well liquid density; S12: Calculate the drainage height based on the original casing pressure, the original tubing pressure, and the well liquid density, set the production plunger at the initial position and open the production valve, make the production plunger fall into the production well from the initial position, and collect the well environment data until the production plunger falls into the well liquid.

[0007] For the production well control method based on double load values provided by the present invention, step S2 specifically includes: S21: Calculate the gas column height based on the original tubing pressure and the environmental temperature in the well environment data, and calculate the well temperature correction value based on the water vapor pressure in the well environment data; S22: Substitute the well temperature correction value into the gas column height to obtain the target gas column height.

[0008] For the production well control method based on double load values provided by the present invention, step S3 specifically includes: S31: After the production plunger falls into the well liquid, obtain the acceleration change rate of the acceleration in the liquid through the acceleration sensor, and judge the liquid state based on the acceleration change rate; S32: When the liquid state is homogeneous liquid, obtain the pressure change rate with respect to the liquid depth, and calculate the liquid depth through the pressure change rate and the liquid surface pressure in the well environment data; When the liquid state is stratified liquid, determine the thickness of the first liquid layer based on the acceleration change rate, and determine the pressure of the first liquid layer through the thickness of the first liquid layer; Obtain the pressure change rate with respect to the liquid depth, and calculate the liquid depth through the pressure change rate, the thickness of the first liquid layer, and the pressure of the first liquid layer.

[0009] According to the production well control method based on dual load values provided by the present invention, in step S4, calculate the ratio of the liquid depth to the drainage height to obtain the distance judgment parameter, determine the distance judgment parameter threshold according to the target gas column height, and when the distance judgment parameter is greater than the distance judgment parameter threshold, the production plunger expands.

[0010] According to the production well control method based on dual load values provided by the present invention, in step S5, after obtaining the first load value, obtain the first load value threshold, and execute the well-opening command when the first load value reaches the first load value threshold, and make the production plunger return to the initial position; after obtaining the second load value, obtain the second load value threshold, and execute the well-closing command when the second load value reaches the second load value threshold.

[0011] According to the production well control method based on dual load values provided by the present invention, in step S5, the value range of the first load value threshold is 40% - 50%, and the specific value of the first load value threshold is determined according to the shut-in casing pressure. The value range of the second load value threshold is 90% - 100%, and the specific value of the second load value threshold is determined according to the rising speed of the shut-in casing pressure.

[0012] The present invention also provides a production well control system based on dual load values, including: Drainage height module: used to determine the production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, make the production plunger fall into the production well from the initial position, and collect the well environment data; Target gas column height module: calculate the target gas column height according to the well environment data; Liquid depth module: used to obtain the acceleration in the liquid, judge the liquid state according to the acceleration in the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; Distance judgment parameter module: used to calculate the distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; Production well production module: used to collect the shut-in production data, calculate the first load value through the shut-in production data, execute the well-opening command according to the first load value, and make the production plunger return to the initial position, collect the well-opening production data, calculate the second load value through the well-opening production data, and execute the well-closing command according to the second load value, and control the production of the production well through the well-opening command and the well-closing command.

[0013] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of any one of the above-mentioned production well control methods based on dual load values are implemented.

[0014] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above-mentioned production well control methods based on dual load values are implemented.

[0015] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: The production well control method, system, device, and medium based on dual load values provided by the present invention calculate a first load value and a second load value respectively through shut-in production data and flowing production data, so as to automatically control the execution of the flowing well command and the shut-in well command, making the flowing well timing and shut-in well timing of the production well more in line with the production reality, and the load value threshold can be flexibly adjusted according to the change of the casing pressure, effectively improving the productivity of low-pressure production wells. In addition, the liquid depth can be determined according to different liquid states and the production plunger expansion can be controlled, so as to overcome the change of liquid state caused by the infiltration of seawater, salt, water injection, etc.

[0016] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic flow chart of the production well control method based on dual load values provided by the present invention.

[0019] Figure 2 It is a schematic structural diagram of the production well control system based on dual load values provided by the present invention.

[0020] Figure 3 It is a schematic structural diagram of the production well control device based on dual load values provided by the present invention.

[0021] Reference Signs: 100, Drainage height module; 200, Target gas column height module; 300, Liquid depth module; 400, Distance judgment parameter module; 500, Production well production module; 810, Processor; 820, Communication interface; 830, Memory; 840, Communication bus. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0025] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0026] The following is combined with Figures 1 to 3 to describe the detailed implementation manners of the present invention: Figure 1It is a schematic flow chart of the production well control method based on double load values provided by the present invention. First, initial production data is obtained, the drainage height is calculated, the production plunger is made to fall from the initial position, the well environment data is collected, and then the target gas column height is calculated according to the well environment data; Subsequently, the acceleration in the liquid is obtained and the liquid state is judged, so as to calculate the pressure change rate and obtain the liquid depth; Then, the distance judgment parameter is calculated through the liquid depth and the drainage height, and the expansion of the production plunger is controlled through the distance judgment parameter; Finally, the first load value is calculated and the well opening command is executed according to the first load value, the second load value is calculated and the well closing command is executed according to the second load value.

[0027] For the above steps, the specific implementation in this embodiment is as follows: S1: Determine the production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, make the production plunger fall into the production well from the initial position, and collect the well environment data; Furthermore, the purpose of this stage is to obtain the initial production data of the production well, thereby calculating the drainage height, and making the production plunger fall into the production well from the initial position to collect the well environment data. Specifically, step S1 specifically includes: S11: Determine the production well, make the production plunger execute a production cycle, and obtain the initial production data including the original casing pressure, the original tubing pressure, and the well liquid density; S12: Calculate the drainage height through the original casing pressure, the original tubing pressure, and the well liquid density, set the production plunger at the initial position and open the production valve, make the production plunger fall into the production well from the initial position, and collect the well environment data until the production plunger falls into the well liquid.

[0028] For the above steps, the specific implementation in this embodiment is as follows: First, determine the production well. In this embodiment, the production well is an offshore low-pressure gas production well located offshore with a low formation pressure, and production facilities such as a production plunger and an electric needle valve are installed on the production well. Subsequently, make the production plunger execute a production cycle, that is, complete a cycle of falling from the initial position and then rising back to the initial position, and the initial production data including the original casing pressure, the original tubing pressure, and the well liquid density before the plunger falls can be obtained through the sensors on the production plunger and in the production well.

[0029] Then, the original casing pressure can be used 、the original tubing pressure and the well liquid density to calculate the drainage height : Among them, g is the acceleration due to gravity. To avoid excessive liquid drainage resulting in the ultimate failure of liquid lifting, the drainage height is controlled to be no greater than 300 meters. If the calculated drainage height is greater than 300 meters, it is uniformly taken as 300 meters. To avoid too little liquid drainage resulting in the production plunger rising to the initial position too fast and causing damage, when the calculated drainage height is less than 150 meters, it is uniformly taken as 150 meters.

[0030] Subsequently, the production plunger is set at the initial position and the production valve in the electric needle valve is opened, and other valves are closed, so that the production plunger falls freely into the production well from the initial position, and the environmental data in the well is collected by the built-in sensor during this process until it falls into the well liquid. Since the acceleration of the production plunger changes violently at the moment it falls into the well liquid, the moment when the production plunger has fallen into the well liquid can be determined by the sudden change of the acceleration change rate.

[0031] S2: Calculate the target gas column height according to the well environmental data; Furthermore, the purpose of this stage is to calculate the gas column height according to the well environmental data, so as to calculate the well temperature correction value and correct the gas column height to obtain the target gas column height. Specifically, step S2 specifically includes: S21: Calculate the gas column height through the original pressure of the tubing and the environmental temperature in the well environmental data, and calculate the well temperature correction value through the water vapor pressure in the well environmental data; S22: Substitute the well temperature correction value into the gas column height to obtain the target gas column height.

[0032] For the above steps, the specific implementation method in this embodiment is as follows: First, calculate the gas column height through the original pressure of the tubing and the environmental temperature T in the well environmental data : Among them, R is the gas constant, taken as 8.314 J / (mol·K) and K is the unit of thermodynamic temperature, M is the molar mass of air, taken as 0.02896 kg / mol, and P1 is the liquid surface pressure at the moment when the production plunger falls into the well liquid, and this value is measured by the sensor built in the production plunger.

[0033] Then calculate the well temperature correction value through the water vapor pressure e in the well environmental data : Finally, substitute the well temperature correction value into the gas column height, and the target gas column height can be obtained : S3: Obtain the acceleration inside the liquid, determine the liquid state based on the acceleration inside the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth based on the pressure change rate. Further, the purpose of this stage is to determine the liquid state based on the acceleration inside the liquid, thereby calculating the pressure change rate and obtaining the liquid depth. Specifically, step S3 specifically includes: S31: After the production plunger falls into the well liquid, obtain the acceleration change rate of the acceleration inside the liquid through an acceleration sensor, and determine the liquid state based on the acceleration change rate. S32: When the liquid state is a homogeneous liquid, obtain the pressure change rate of the pressure with respect to the liquid depth, and calculate the liquid depth through the pressure change rate and the liquid surface pressure in the well environment data. When the liquid state is a stratified liquid, determine the thickness of the first liquid layer based on the acceleration change rate, and determine the pressure of the first liquid layer through the thickness of the first liquid layer. Obtain the pressure change rate of the pressure with respect to the liquid depth, and calculate the liquid depth through the pressure change rate, the thickness of the first liquid layer, and the pressure of the first liquid layer.

[0034] For the above steps, the specific implementation in this embodiment is as follows: First, after the production plunger falls into the well liquid, first obtain the acceleration change rate of the acceleration inside the liquid of the production plunger in the liquid through an acceleration sensor, and determine the liquid state based on the acceleration change rate. Specifically, if after the production plunger falls into the well liquid, if the liquid state is a homogeneous liquid, before the production plunger expands, the absolute value of the acceleration will decrease relatively smoothly, so the acceleration change rate will not mutate, and at this time, the liquid state can be determined to be a homogeneous liquid.

[0035] In addition, since the offshore production well is located in a marine environment, seawater, salt, etc. may enter the formation during production, drilling, etc. For low-pressure gas production wells with low production pressure, there will also be more water in the formation, so this may cause the liquid in the production well to be stratified. If the liquid state is a stratified liquid, before the production plunger expands, during the process of passing through the liquid surface junction of the stratified liquid, due to the change in the density of the liquid, the absolute value of its acceleration will mutate, so the acceleration change rate will also mutate, and at this time, the liquid state can be determined to be a stratified liquid.

[0036] When the liquid is a homogeneous liquid, the pressure change rate k of the pressure with respect to the liquid depth in the homogeneous liquid can be estimated according to the density of the well liquid, and then the pressure in the liquid obtained by the sensor when the production plunger is in the liquid can be used to obtain the liquid surface pressure h according to the difference between the pressure in the water and the liquid surface pressure and the liquid surface pressure: When the liquid state is a stratified liquid, usually the upper liquid is a light liquid such as alkanes and the amount is small. The main component of the well liquid is the heavier lower liquid. Therefore, the density of the well liquid can be directly taken as the density of the lower liquid. At this time, the thickness of the upper liquid is taken as the thickness of the first liquid layer. For the thickness of the first liquid layer, due to its low thickness, the following method can be used to estimate the thickness of the first liquid layer: The acceleration change rate before the sudden change of the acceleration change rate is taken as the acceleration change rate in the upper liquid, and the time from when the production plunger enters the well liquid to before the sudden change of the acceleration change rate is taken as the passing time of the upper liquid. Integrating the acceleration change rate over the passing time of the upper liquid can obtain the average acceleration in the upper liquid. Then, integrating the average acceleration over the passing time of the upper liquid can obtain the average velocity in the upper liquid. Finally, multiplying the passing time of the upper liquid by the average velocity can obtain the thickness of the first liquid layer 。

[0037] Subsequently, according to the thickness of the first liquid layer, the liquid surface pressure at the moment when the production plunger falls into the well liquid, and the density of the first liquid layer estimated according to experience, the pressure of the first liquid layer at the liquid surface junction of the stratified liquid is obtained 。Then, estimate the pressure change rate k of the pressure with the liquid depth in the lower liquid according to the density of the well liquid. Furthermore, according to the pressure in the liquid obtained by the production plunger passing through the sensor in the lower liquid ,calculate the liquid depth h through the pressure change rate, the thickness of the first liquid layer, and the pressure of the first liquid layer: S4: Calculate the distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; Furthermore, the purpose of this stage is to calculate the distance judgment parameter and control the expansion of the production plunger through the distance judgment parameter. Specifically, in step S4, calculate the ratio of the liquid depth to the drainage height to obtain the distance judgment parameter. Determine the distance judgment parameter threshold according to the target gas column height. When the distance judgment parameter is greater than the distance judgment parameter threshold, the production plunger expands.

[0038] For the above steps, the specific implementation method in this embodiment is as follows: After the production plunger enters the well liquid for a certain distance, it needs to hover in the well liquid. This requires the production plunger to expand to increase its own buoyancy so that it can decelerate and float in the well liquid. Therefore, when the production plunger approaches the hovering depth determined according to experience, the production plunger needs to be expanded. In order to control the expansion timing of the production plunger, calculate the ratio of the liquid depth to the drainage height to obtain the distance judgment parameter : Subsequently, a distance judgment parameter threshold is determined according to the target gas column height. In this embodiment, the distance judgment parameter threshold can take a value between 70% and 90%, and the specific value is determined according to the target gas column height. The higher the value of the target gas column height, the longer the falling distance of the production plunger, the earlier deceleration needs to start, and the smaller the value of the distance judgment parameter threshold. When the distance judgment parameter is greater than the distance judgment parameter threshold, the production plunger expands and starts to decelerate.

[0039] S5: Collect shut-in production data, calculate a first load value based on the shut-in production data, execute an open well command according to the first load value, and return the production plunger to the initial position. Collect open well production data, calculate a second load value based on the open well production data, and execute a shut-in command according to the second load value, and control the production of the production well through the open well command and the shut-in command.

[0040] Furthermore, the purpose of this stage is to calculate the first load value so as to execute the open well command, calculate the second load value so as to execute the shut-in command, and control the production of the production well. Specifically, in step S5, after obtaining the first load value, a first load value threshold is obtained. When the first load value reaches the first load value threshold, the open well command is executed, and the production plunger is returned to the initial position; after obtaining the second load value, a second load value threshold is obtained. When the second load value reaches the second load value threshold, the shut-in command is executed.

[0041] In step S5, the value range of the first load value threshold is 40% - 50%, and the specific value of the first load value threshold is determined according to the shut-in casing pressure. The value range of the second load value threshold is 90% - 100%, and the specific value of the second load value threshold is determined according to the rising speed of the shut-in casing pressure.

[0042] For the above steps, the specific implementation in this embodiment is as follows: After the production plunger expands, decelerates, and finally floats in the well fluid, collect the oil and gas pressure in the production well and the production plunger through sensors, including the shut-in state , the shut-in casing pressure in the shut-in state and the pipeline pressure in the shut-in state of the shut-in production data, so as to calculate the first load value : After obtaining the first load value, obtain the first load value threshold. The value range of the first load value threshold is between 40% and 50%, and the specific value of the first load threshold is determined according to the shut-in casing pressure. The higher the shut-in casing pressure, the higher the value of the first load threshold. When the first load value reaches the first load value threshold, the well-opening command can be executed. After the well is opened, the production plunger will return to the initial position with the rising oil and gas. At this time, the sensors in the production well and the production plunger continue to collect the oil and gas pressure in the well-opening state , the well-opening casing pressure in the well-opening state and the pipeline pressure in the well-opening state of the well-opening production data, so as to calculate the second load value : After obtaining the second load value, obtain the second load value threshold. The value range of the second load value threshold is between 90% and 100%, and the specific value of the second load value threshold is determined according to the rising speed of the shut-in casing pressure during the previous well shut-in. In this embodiment, since the production well is an offshore low-pressure gas production well with a low formation pressure, the shut-in casing pressure will continue to rise during well shut-in. The faster the rising speed of the shut-in casing pressure, the higher the value of the second load threshold. When the second load value reaches the second load value threshold, execute the well-shut-in command, and the production plunger obtains the initial production data again to calculate the drainage height and then falls. In this way, the well-opening command and the well-shut-in command are repeatedly executed to control the production of the production well.

[0043] The present invention takes into account the influence of special environments such as the ocean on the production well through the liquid state, calculates the liquid depth more accurately, and controls the production of the production well through the first load value and the second load value, effectively improving the production control efficiency of the offshore production well, thereby increasing its production rate.

[0044] Next, the production well control device based on dual load values provided by the present invention will be described. The production well control device based on dual load values described below can be mutually corresponding and referred to the production well control method based on dual load values described above.

[0045] Figure 2 is a structural schematic diagram of a production well control system based on dual load values, as Figure 2 shown, for executing the production well control method based on dual load values as described above, including: Drainage height module 100: used to determine the production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, make the production plunger fall into the production well from the initial position, and collect the well environment data; Target gas column height module 200: calculate the target gas column height according to the well environment data; Liquid depth module 300: It is used to obtain the acceleration inside the liquid, judge the liquid state according to the acceleration inside the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; Distance judgment parameter module 400: It is used to calculate the distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; Production well production module 500: It is used to collect shut-in production data, calculate the first load value through the shut-in production data, execute the open-well command according to the first load value, and make the production plunger return to the initial position, collect open-well production data, calculate the second load value through the open-well production data, and execute the shut-in command according to the second load value, and control the production of the production well through the open-well command and the shut-in command.

[0046] On the other hand, Figure 3 An entity structure diagram of an electronic device is exemplified, as Figure 3 shown. The electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 complete mutual communication through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute a production well control method based on dual load values. The method includes: S1: Determine the production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, make the production plunger fall into the production well from the initial position, and collect the well environment data; S2: Calculate the target gas column height according to the well environment data; S3: Obtain the acceleration inside the liquid, judge the liquid state according to the acceleration inside the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; S4: Calculate the distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; S5: Collect shut-in production data, calculate the first load value through the shut-in production data, execute the open-well command according to the first load value, and make the production plunger return to the initial position, collect open-well production data, calculate the second load value through the open-well production data, and execute the shut-in command according to the second load value, and control the production of the production well through the open-well command and the shut-in command.

[0047] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0048] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the production well control method based on dual load values provided by the above-mentioned various methods. The method includes: S1: Determine the production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, make the production plunger fall into the production well from the initial position, and collect the well environment data; S2: Calculate the target gas column height according to the well environment data; S3: Obtain the acceleration in the liquid, judge the liquid state according to the acceleration in the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; S4: Calculate the distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; S5: Collect the production data during well shut-in, calculate the first load value through the production data during well shut-in, execute the well-opening command according to the first load value, and make the production plunger return to the initial position. Collect the production data during well opening, calculate the second load value through the production data during well opening, and execute the well-shut-in command according to the second load value. Control the production of the production well through the well-opening command and the well-shut-in command.

[0049] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.

[0050] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A production well control method based on dual load values, characterized in that, Including: S1: Determine a production well, obtain initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at an initial position, let the production plunger fall into the production well from the initial position, and collect well environment data; S2: Calculate the target gas column height according to the well environment data; S3: Obtain the acceleration in the liquid, judge the liquid state according to the acceleration in the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; S4: Calculate a distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; S5: Collect shut-in production data, calculate a first load value through the shut-in production data, execute an open well command according to the first load value, and make the production plunger return to the initial position, collect open well production data, calculate a second load value through the open well production data, and execute a shut-in well command according to the second load value, and control the production of the production well through the open well command and the shut-in well command.

2. The production well control method based on dual load values according to claim 1, wherein Step S1 specifically includes: S11: Determine a production well, let the production plunger execute a production cycle, and obtain initial production data including the original casing pressure, the original tubing pressure, and the well fluid density; S12: Calculate the drainage height through the original casing pressure, the original tubing pressure, and the well fluid density, set the production plunger at the initial position and open the production valve, let the production plunger fall into the production well from the initial position, and collect the well environment data until the production plunger falls into the well fluid.

3. The production well control method based on dual load values according to claim 1, characterized in that Step S2 specifically includes: S21: Calculate the gas column height through the original tubing pressure and the environmental temperature in the well environment data, and calculate a well temperature correction value through the water vapor pressure in the well environment data; S22: Substitute the well temperature correction value into the gas column height to obtain the target gas column height.

4. The production well control method based on dual load values according to claim 1, characterized in that, Step S3 specifically includes: S31: After the production plunger falls into the well fluid, obtain the acceleration change rate of the acceleration in the liquid through an acceleration sensor, and judge the liquid state according to the acceleration change rate; S32: When the liquid state is a uniform liquid, obtain the pressure change rate of the pressure with respect to the liquid depth, and calculate the liquid depth through the pressure change rate and the liquid surface pressure in the well environment data; When the liquid state is a stratified liquid, determine the thickness of the first liquid layer according to the acceleration change rate, and determine the pressure of the first liquid layer through the thickness of the first liquid layer; Obtain the pressure change rate of the pressure with respect to the liquid depth, and calculate the liquid depth through the pressure change rate, the thickness of the first liquid layer, and the pressure of the first liquid layer.

5. The production well control method based on dual load values according to claim 1, characterized in that, In step S4, calculate the ratio of the liquid depth to the drainage height to obtain the distance judgment parameter, determine the distance judgment parameter threshold according to the target gas column height, and when the distance judgment parameter is greater than the distance judgment parameter threshold, the production plunger expands.

6. The production well control method based on dual load values according to claim 1, wherein In step S5, after obtaining the first load value, obtain the first load value threshold. When the first load value reaches the first load value threshold, execute the well-opening command and return the production plunger to the initial position; after obtaining the second load value, obtain the second load value threshold. When the second load value reaches the second load value threshold, execute the well-closing command.

7. The production well control method based on dual load values according to claim 6, wherein In step S5, the value range of the first load value threshold is 40% - 50%, and the specific value of the first load value threshold is determined according to the shut-in casing pressure. The value range of the second load value threshold is 90% - 100%, and the specific value of the second load value threshold is determined according to the rising speed of the shut-in casing pressure.

8. A production well control system based on dual load values, which is used to execute the production well control method based on dual load values according to any one of claims 1 to 7, characterized in that Including: Drainage height module: used to determine the production well, obtain the initial production data of the production well, calculate the drainage height through the initial production data, set the production plunger at the initial position, let the production plunger fall into the production well from the initial position, and collect the well environment data; Target gas column height module: calculate the target gas column height according to the well environment data; Liquid depth module: used to obtain the acceleration in the liquid, judge the liquid state according to the acceleration in the liquid, calculate the pressure change rate through the liquid state, and calculate the liquid depth according to the pressure change rate; Distance judgment parameter module: used to calculate the distance judgment parameter through the liquid depth and the drainage height, and control the expansion of the production plunger through the distance judgment parameter and the target gas column height; Production well production module: used to collect the shut-in production data, calculate the first load value through the shut-in production data, execute the well-opening command according to the first load value, and return the production plunger to the initial position, collect the well-opening production data, calculate the second load value through the well-opening production data, and execute the well-closing command according to the second load value, and control the production of the production well through the well-opening command and the well-closing command.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the production well control method based on dual load values according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the production well control method based on dual load values according to any one of claims 1 to 7.

Images