Gas volume condition self-adaptive dew point regulation system, method, device and storage medium

Abstract

The present application belongs to the field of natural gas underground storage ground engineering, and particularly relates to a gas quantity working condition self-adaptive dew point regulation system, method, device and storage medium, aiming to solve the problem that the prior art lacks a comprehensive and specific gas quantity working condition self-adaptive dew point regulation method. The present application comprises: parallel J-T valve groups; parameter acquisition sensors are arranged on both sides of the J-T valve; the parameter acquisition sensors are used to acquire dew point factor parameters on both sides of the J-T valve; an AD module of a field RTU is used to receive dew point factor parameters transmitted by a communication system, and convert the dew point factor parameters into digital signals, which are then transmitted to a dew point regulation platform in a control room of the gas storage through the field RTU; and the dew point regulation platform in the control room of the gas storage is used to regulate the J-T valve according to the dew point factor parameters. The present application creates a gas quantity working condition self-adaptive dew point regulation method, and provides a new mode for smooth operation of gas quantity working conditions in all scenes of the gas storage.

Description

Technical Field

[0001] This invention belongs to the field of surface engineering for underground natural gas storage facilities, and specifically relates to an adaptive dew point control system, method, equipment, and storage medium for gas volume and operating conditions. Background Technology

[0002] As the most important and effective peak-shaving and supply guarantee resource, gas storage facilities traditionally operate by injecting gas in summer and autumn and producing gas in winter and spring. Without affecting the normal operation of the gas storage facility and the total injection volume, utilizing one well for gas-driven oil recovery and another for liquid production can not only improve condensate oil recovery but also positively promote the acceleration of the gas storage facility's capacity and production. This represents a new direction for the coordinated development of gas storage facilities and oil and gas development, and a new path for improving the quality and efficiency of old oilfields. Traditional gas storage facility surface treatment systems during the production period are configured according to the overall gas-liquid volume during the production period, including gas-liquid separation facilities, natural gas dew point control facilities, and natural gas metering and pressure regulating facilities. The dew point control device, in particular, mainly uses JT valves for cooling and dew point control. Its principle is that the well fluid undergoes multi-stage throttling and gradual cooling to meet the requirements for natural gas treatment. In addition, other auxiliary cooling devices are also provided. However, JT valves adapted to large-volume operating conditions have difficulty guaranteeing the natural gas dew point control requirements under small-volume operating conditions in single-well gas production. In order to ensure the gas production and oil production processing needs under small-volume operating conditions during the gas injection period, it is necessary to upgrade the surface gas production processing cooling process to meet both the dew point control requirements of large-volume operating conditions using large-diameter JT valves during the gas production period and the dew point control requirements of small-volume operating conditions using small-diameter JT valves during the injection and production synergy period. At the same time, the differences in gas media also need to be considered.

[0003] However, existing technologies lack research methods for adaptive dew point regulation that take into account comprehensive and specific gas volume conditions. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, namely the lack of a comprehensive and specific research method for adaptive dew point control based on gas volume operating conditions, this invention provides a gas volume operating condition adaptive dew point control system, the system comprising:

[0005] A parallel JT valve assembly; the JT valve assembly includes JT valves; parameter acquisition sensors are installed on both sides of the JT valves;

[0006] A parameter acquisition sensor is used to acquire dew point factor parameters on both sides of the JT valve;

[0007] The AD module of the field RTU is used to receive dew point factor parameters transmitted by the communication system, convert the dew point factor parameters into digital signals, and then transmit them to the dew point control platform in the central control room of the gas storage facility via the field RTU.

[0008] The dew point control platform in the central control room of the gas storage facility is used to control the JT valve according to the dew point factor parameters.

[0009] In a preferred embodiment, the parameter acquisition sensor is a wireless sensor, which includes a CH4 mole fraction sensor, a temperature sensor, and a pressure sensor.

[0010] In a preferred embodiment, the dew point factor parameters are based on dew point factor collection, and the dew point factors are obtained by analyzing historical data of all factors that affect the dew point using data analysis methods; the dew point factors include: medium stream temperature before JT valve throttling, medium stream temperature after JT valve throttling, medium stream pressure before JT valve throttling, and CH4 mole fraction in the medium.

[0011] In a second aspect, the present invention proposes an adaptive dew point control method for gas volume operating conditions, based on the operation of the aforementioned adaptive dew point control system for gas volume operating conditions. The control method includes: calculating the pressure difference of the JT valve based on the dew point factor parameters, calculating the valve opening angle of the JT valve based on the pressure difference of the JT valve, and controlling the JT valve based on the valve opening angle.

[0012] In a preferred embodiment, the method for calculating the differential pressure of the JT valve based on the dew point factor parameters is as follows: based on the dew point factor parameters, the pressure of the medium stream after throttling is calculated according to the temperature-pressure balance formula; the difference between the pressure of the medium stream after throttling of the JT valve and the pressure of the medium stream before throttling of the JT valve is the differential pressure of the JT valve.

[0013] The temperature and pressure balance formula is as follows:

[0014]

[0015] Where T1 is the temperature of the medium stream before throttling by the JT valve, T2 is the temperature of the medium stream after throttling by the JT valve, P1 is the pressure of the medium stream before throttling by the -T valve, α is the correction coefficient for the throttling process of the JT valve, β is the isentropic exponent for the throttling process of the JT valve, and P2 is the pressure of the medium stream after throttling by the -T valve.

[0016] In a preferred embodiment, the method for calculating the valve opening angle of the JT valve based on the pressure difference of the JT valve is as follows:

[0017] θ = KΔP;

[0018] Where θ is the valve opening angle of the JT valve, ΔP is the pressure difference of the JT valve, and K is the correction coefficient.

[0019] A third aspect of the present invention provides an electronic device comprising:

[0020] At least one processor; and

[0021] A memory communicatively connected to at least one of the processors; wherein,

[0022] The memory stores instructions that can be executed by the processor to implement the above-described gas volume adaptive dew point control method.

[0023] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for execution by the computer to implement the above-described gas volume adaptive dew point control method.

[0024] The beneficial effects of this invention are:

[0025] (1) This invention ensures the gas and oil production processing needs of small gas volume conditions during the gas injection period, meets the requirements for dew point control of large gas volume conditions using large-diameter JT valves during the gas production period, meets the requirements for dew point control of small gas volume conditions using small-diameter JT valves during the injection and production coordination period, and also needs to consider the differences in gas medium.

[0026] (2) This invention is guided by the dew point control in the production and operation process of gas wells. Through the analysis, acquisition, processing and transmission of information on factors affecting the dew point, and with the help of the parallel JT valve group design, it creates an adaptive dew point control method for gas volume conditions. This provides a new mode for the stable operation of gas volume conditions in all scenarios of gas storage, and further improves the digitalization and intelligence level of oil fields.

[0027] (3) This invention, without affecting the normal operation of the gas storage facility and the total gas injection volume, utilizes one well for gas injection and another for liquid production, which not only improves the recovery rate of condensate oil but also actively promotes the acceleration of the gas storage facility to reach its capacity and production level. This invention analyzes the factors affecting dew point, sets up corresponding sensors to acquire parameter information, performs signal conversion using formulas, and automatically adjusts the opening of the JT valve through data transmission to achieve pressure and temperature reduction regulation. Based on the parameter feedback, the adjustment signal is optimized and tuned to achieve dew point control. The parallel JT valve group design solves the problem of dew point control under different gas volume conditions in the injection-production coordinated mode. Attached Figure Description

[0028] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of an adaptive dew point control system for gas volume operating conditions according to an embodiment of the present invention;

[0030] Figure 2 This is a flowchart illustrating an adaptive dew point control method for gas volume operating conditions according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of a computer system used to implement the methods, systems, and devices of this application. Detailed Implementation

[0032] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] This invention provides an adaptive dew point control system for gas volume operating conditions, characterized in that the system comprises:

[0035] A parallel JT valve assembly; the JT valve assembly includes JT valves; parameter acquisition sensors are installed on both sides of the JT valves;

[0036] A parameter acquisition sensor is used to acquire dew point factor parameters on both sides of the JT valve;

[0037] The field RTU is used to receive dew point factor parameters transmitted by the communication system, convert the dew point factor parameters into digital signals, and then transmit them to the dew point control platform in the central control room of the gas storage facility.

[0038] The dew point control platform in the central control room of the gas storage facility is used to control the JT valve according to the dew point factor parameters.

[0039] To more clearly explain the gas volume adaptive dew point control system of the present invention, the following will be combined with... Figure 1 The following is a detailed description of each part in the embodiments of the present invention:

[0040] A parallel JT valve assembly; the JT valve assembly includes JT valves; parameter acquisition sensors are installed on both sides of the JT valves;

[0041] Specifically, in the JT valve refrigeration process, a large-diameter JT valve (DN200) and a small-diameter JT valve (DN80) are connected in parallel. The large-diameter JT valve ensures that the dew point meets the control requirements during the gas production period, while the small-diameter JT valve ensures that the dew point control requirements for small gas volume conditions are met during the single-well gas production period. The specific JT valve route is selected according to the actual production situation on site and can be controlled remotely or manually.

[0042] Based on the well production and operation data and conditions during the gas production period of the gas storage facility, dew point changes in well A were selected to investigate gas production conditions. Process design software was used to simulate the gas production conditions of well A, with a daily gas production rate of 10–40 × 10⁻⁶. 4 m 3 At that time, the dew point temperature fluctuated between 5 and -3℃; the daily gas extraction volume gradually increased to 59×10 4 m 3 At that time, the dew point temperature dropped to -5℃. Based on the production situation analysis, it is estimated that the daily gas extraction volume was 50 × 10⁻⁶. 4 m 3 At the following time, the large-diameter JT valve (DN200) dew point control cannot operate normally. To meet the single-well gas production needs during the injection period of Well A, cooling via a small-diameter JT valve (DN80) is required. Therefore, the gas production rate is 50 × 10⁻⁶. 4 m 3 This is a gas volume inflection point, for example, used as the gas volume basis for JT valve routing selection. On a certain day, the measured gas volume was 45 × 10⁻⁶. 4 m 3 For this operating condition, a small-diameter JT valve (DN80) should be selected.

[0043] Specifically, a CH4 mole fraction sensor, a medium temperature sensor, and a medium pressure sensor are installed before the JT valve, and a medium temperature sensor and a medium pressure sensor are installed after the JT valve.

[0044] Sensors are also divided into wired and wireless types. This embodiment uses low-power wireless sensors for automatic measurement and remote transmission, and the acquisition cycle and frequency can be determined according to production needs.

[0045] A parameter acquisition sensor is used to acquire dew point factor parameters on both sides of the JT valve. The parameter acquisition sensor is a wireless sensor and includes a CH4 mole fraction sensor, a temperature sensor, and a pressure sensor.

[0046] The AD module of the field RTU is used to receive dew point factor parameters transmitted by the communication system, convert the dew point factor parameters into digital signals, and then transmit them to the dew point control platform in the central control room of the gas storage facility via the field RTU.

[0047] Specifically, the AD module (analog-to-digital converter) converts the acquired medium flow temperature before throttling, medium flow temperature after throttling, medium flow pressure before throttling, medium flow pressure after throttling, and medium relative density into digital signals, i.e., digital results, which can then be processed and transmitted.

[0048] In this step, the voltage signal information generated by the sensor is transmitted to the AD module, mainly relying on the oilfield's communication system. Wireless methods such as GPRS, TD-LTE, and Zigbee can be used, or fiber optic cables can be employed. In this embodiment, an RTU is installed in the gas storage ground system. The RTU has communication capabilities and integrates an AD module. The AD module converts the received voltage signals from the wireless medium temperature sensor, wireless medium pressure sensor, and wireless medium density sensor located before and after the JT valve into digital signals via a PCL program. The voltage signals and digital signals are mapped to each other.

[0049] The RTU establishes communication with the central control room platform and can transmit data via GPRS, TD-LTE, or fiber optics.

[0050] In this embodiment, the dew point factor parameters are based on dew point factor collection, and the dew point factors are obtained by analyzing historical data of all factors that affect the dew point using data analysis methods; the dew point factors include: medium stream temperature before JT valve throttling, medium stream temperature after JT valve throttling, medium stream pressure before JT valve throttling, and CH4 mole fraction in the medium.

[0051] The dew point control platform in the central control room of the gas storage facility is used to control the JT valve according to the dew point factor parameters.

[0052] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the system described above can be found in the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0053] It should be noted that the gas volume adaptive dew point control system provided in the above embodiments is only an example of the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiments can be merged into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the various modules or steps and are not considered as an improper limitation of the present invention.

[0054] The second embodiment of the present invention provides an adaptive dew point control method for gas volume operating conditions, which operates based on the above-mentioned adaptive dew point control system for gas volume operating conditions. The control method includes: calculating the pressure difference of the JT valve based on the dew point factor parameters, calculating the valve opening angle of the JT valve based on the pressure difference of the JT valve, and controlling the JT valve based on the valve opening angle.

[0055] The method for calculating the differential pressure of the JT valve based on the aforementioned dew point factor parameters is as follows:

[0056] Based on the dew point factor parameters, the pressure of the medium stream after throttling is calculated according to the temperature and pressure balance formula; the difference between the pressure of the medium stream after throttling by the JT valve and the pressure of the medium stream before throttling by the JT valve is the pressure difference of the JT valve;

[0057] The temperature and pressure balance formula is as follows:

[0058] Where T1 is the temperature of the medium stream before throttling by the JT valve, T2 is the temperature of the medium stream after throttling by the JT valve, P1 is the pressure of the medium stream before throttling by the -T valve, α is the correction coefficient for the throttling process of the JT valve, β is the isentropic exponent for the throttling process of the JT valve, and P2 is the pressure of the medium stream after throttling by the -T valve.

[0059] The method for calculating the valve opening angle of the JT valve based on the pressure difference of the JT valve is as follows: θ = KΔP;

[0060] Where θ is the valve opening angle of the JT valve, ΔP is the pressure difference of the JT valve, and K is the correction coefficient.

[0061] In this embodiment, K is obtained by consulting a chart based on the mole fraction of methane.

[0062] This invention also provides an example of a complete gas volume adaptive dew point control method, such as... Figure 2 As shown, the specific steps are as follows:

[0063] Step 101: Set up parallel JT valve groups

[0064] Specifically, in the JT valve refrigeration process, a large-diameter JT valve (DN200) and a small-diameter JT valve (DN80) are connected in parallel. The large-diameter JT valve ensures that the dew point meets the control requirements during the gas production period, while the small-diameter JT valve ensures that the dew point control requirements for small gas volume conditions are met during the single-well gas production period. The specific JT valve route is selected according to the actual production situation on site and can be controlled remotely or manually.

[0065] Based on the well production and operation data and conditions during the gas production period of the gas storage facility, dew point changes in well A were selected to investigate gas production conditions. Process design software was used to simulate the gas production conditions of well A, with a daily gas production rate of 10–40 × 10⁻⁶. 4 m 3 At that time, the dew point temperature fluctuated between 5 and -3℃; the daily gas extraction volume gradually increased to 59×10 4 m 3 At that time, the dew point temperature dropped to -5℃. Based on the production situation analysis, it is estimated that the daily gas extraction volume was 50 × 10⁻⁶. 4 m 3 At the following time, the large-diameter JT valve (DN200) dew point control cannot operate normally. To meet the single-well gas production needs during the injection period of Well A, cooling via a small-diameter JT valve (DN80) is required. Therefore, the gas production rate is 50 × 10⁻⁶. 4 m 3 This is the gas volume inflection point, which serves as the gas volume basis for JT valve routing selection.

[0066] The daily gas sampling volume was measured to be 45 × 10⁻⁶. 4 m 3 For this operating condition, a small-diameter JT valve (DN80) should be selected.

[0067] Step 102: Analyze factors affecting dew point

[0068] Specifically, the analysis suggests that the main factors affecting dew point changes are medium temperature, medium pressure, and the molar fraction of CH4 in the medium.

[0069] Step 103: Set up the sensor

[0070] Specifically, a CH4 mole fraction sensor, a medium temperature sensor, and a medium pressure sensor are installed before the JT valve, and a medium temperature sensor and a medium pressure sensor are installed after the JT valve.

[0071] Sensors are also divided into wired and wireless types. This embodiment uses low-power wireless sensors for automatic measurement and remote transmission, and the acquisition cycle and frequency can be determined according to production needs.

[0072] Step 104: Obtain parameter information

[0073] The temperature of the medium stream before throttling, the temperature of the medium stream after throttling, the pressure of the medium stream before throttling, the pressure of the medium stream after throttling, and the mole fraction of CH4 in the medium were obtained. The specific parameter information is shown in Table 1.

[0074] Table 1

[0075] The temperature of the medium stream after throttling is the dew point. In this patent, the dew point refers to the temperature at which natural gas condenses into liquid natural gas.

[0076] Step 105: Data is transmitted to the central control room for information processing.

[0077] Step 201: The AD module converts the parameter information acquired by the sensor and outputs it as a digital signal;

[0078] Specifically, the AD module (analog-to-digital converter) converts the acquired medium flow temperature before throttling, medium flow temperature after throttling, medium flow pressure before throttling, medium flow pressure after throttling, and medium relative density into digital signals, i.e., digital results, which can then be processed and transmitted.

[0079] In this step, the voltage signal information generated by the sensor is transmitted to the AD module, mainly relying on the oilfield's communication system. Wireless methods such as GPRS, TD-LTE, and Zigbee can be used, or fiber optic cables can be employed. In this embodiment, an RTU is installed in the gas storage ground system. The RTU has communication capabilities and integrates an AD module. The AD module converts the received voltage signals from the wireless medium temperature sensor, wireless medium pressure sensor, and wireless medium density sensor located before and after the JT valve into digital signals via a PCL program. The voltage signals and digital signals are mapped to each other.

[0080] The RTU establishes communication with the central control room platform and can transmit data via GPRS, TD-LTE, or fiber optics.

[0081] Step 202: The central control room platform inputs the received digital signal into the PID controller for calculation and outputs an adjustment signal;

[0082] Specifically, the central control room platform has a parameter setting function, which can set the optimal temperature after the JT valve throttling. Combined with the actual production situation on site, the minimum dew point temperature T2 = -5℃ can be input into the dew point control platform in the central control room.

[0083] Based on the parameter information in Table 1 and combined with the field production experience database, we can obtain β = 2.30 and K = 1.35. Substituting the above parameters (T1, T2, P1, α, β) into Equation 1, we can calculate the ideal pressure P2 = 0.162 MPa after the JT valve.

[0084] Based on the minimum pressure drop of ΔP = 3.108 MPa, and combined with the field production experience database, we can obtain K = 21° / MPa. Substituting the above parameters (ΔP, K) into formula 2, we can calculate the valve opening angle θ = 65° of the JT valve.

[0085] The PID controller processes the valve opening angle information of the JT valve, outputs an adjustment signal, and transmits it to the DA module in the field RTU.

[0086] Step 203: Compare the target value to perform signal tuning;

[0087] Specifically, the adjustment signal is compared with the target signal, and optimized tuning (positive tuning, negative tuning) is performed so that the system can automatically adjust the pressure drop adjustment signal required to adapt to the expected target dew point, and transmit it to the DA module in the field RTU.

[0088] The frequency adjustment in this step is positively correlated with the feedback frequency in step 106.

[0089] Step 204: The DA module converts the adjustment signal and outputs it as a control signal;

[0090] Specifically, the digital signal is converted into an analog signal through the DA module (digital-to-analog converter), that is, the adjustment signal (digital signal) issued by the PID controller in step 202 is converted into a control signal (analog signal), which is then applied to the subsequent JT valve.

[0091] In this step, the digital control signal information generated by the PID controller is transmitted to the AD module. Data transmission is conducted via GPRS, TD-LTE, and fiber optics, relying on the oilfield's communication system. In this embodiment, the gas storage ground system RTU also integrates an DA module. The DA module can convert the received digital control signal into an analog signal through a PCL program, and the analog signal and digital signal have a mapping relationship.

[0092] Steps 101, 102, 103, and 104 are the basic steps of this invention. Step 106: The JT valve automatically adjusts its opening to achieve dew point control.

[0093] Specifically, based on the analog control signal, the JT valve automatically adjusts its opening to achieve the effect of reducing pressure and temperature;

[0094] The JT valve consists of a controller and an actuator. The driving method can be either pneumatic or electric. In this embodiment, the valve is driven by an electric actuator. The JT valve has a built-in communication module that can receive valve opening adjustment information. The valve opening adjustment information is transmitted to the controller, which recognizes the opening adjustment information and adjusts the opening of the actuator according to the information.

[0095] After JT, a medium temperature sensor is set to synchronously acquire the medium temperature after JT and feed it back to step 105. This process is repeated to regulate the medium temperature after JT, i.e., dew point regulation.

[0096] In actual field operation, to avoid frequent valve adjustments, a temperature threshold can be set after the JT valve is throttled. When the difference between the temperature after the JT valve is adjusted and the optimal temperature is less than the threshold, the JT valve will not be adjusted; the JT valve will only be adjusted when the difference between the temperature after the JT valve is adjusted and the optimal temperature is greater than the threshold.

[0097] After the automatic adjustment based on the gas volume condition is completed, restart step "105" according to the temperature threshold requirement after the JT valve is throttled, until the temperature after the JT valve is adjusted is less than the threshold.

[0098] In this invention, the above-described steps work together to automatically adjust the valve opening according to the temperature of the medium downstream of the JT valve, so that the gas storage tank maintains a relatively stable state during production and operation, and greatly avoids the impact of dew point fluctuations on production efficiency.

[0099] Although the steps in the above embodiments are described in the above order, those skilled in the art will understand that in order to achieve the effect of this embodiment, different steps do not need to be executed in such an order. They can be executed simultaneously (in parallel) or in a reverse order. These simple variations are all within the protection scope of this invention.

[0100] An electronic device according to a third embodiment of the present invention includes:

[0101] At least one processor; and

[0102] A memory communicatively connected to at least one of the processors; wherein,

[0103] The memory stores instructions that can be executed by the processor to implement the above-described gas volume adaptive dew point control method.

[0104] A computer-readable storage medium according to a fourth embodiment of the present invention stores computer instructions, which are executed by the computer to implement the above-described gas volume adaptive dew point control method.

[0105] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the electronic devices and computer storage media described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0106] Those skilled in the art will recognize that the modules and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. The programs corresponding to the software modules and method steps can be placed in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. To clearly illustrate the interchangeability of electronic hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the invention.

[0107] The following is for reference. Figure 3 It shows a schematic diagram of the structure of a computer system for implementing the methods, systems, and devices of this application. Figure 3 The server shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0108] like Figure 3 As shown, the computer system includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes based on programs stored in Read Only Memory (ROM) 602 or programs loaded from storage section 608 into Random Access Memory (RAM) 603. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An Input / Output (I / O) interface 605 is also connected to the bus 604.

[0109] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0110] Specifically, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs the functions defined in the methods of this application. It should be noted that the computer-readable medium described above in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on a computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0111] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0112] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0113] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0114] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0115] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A gas volume adaptive dew point control system, characterized in that, The system includes: A parallel JT valve assembly; the JT valve assembly includes JT valves; parameter acquisition sensors are installed on both sides of the JT valves; A parameter acquisition sensor is used to acquire dew point factor parameters on both sides of the JT valve; The AD module of the field RTU is used to receive dew point factor parameters transmitted by the communication system, convert the dew point factor parameters into digital signals, and then transmit them to the dew point control platform in the central control room of the gas storage through the field RTU. The dew point control platform in the central control room of the gas storage facility is used to control the JT valve according to the dew point factor parameters; wherein, the dew point control platform in the central control room of the gas storage facility is specifically configured as follows: The pressure difference of the JT valve is calculated based on the dew point factor parameters, the valve opening angle of the JT valve is calculated based on the pressure difference of the JT valve, and the JT valve is adjusted based on the valve opening angle.

2. The gas volume adaptive dew point control system according to claim 1, characterized in that, The parameter acquisition sensor is a wireless sensor, which includes: a CH4 mole fraction sensor, a temperature sensor, and a pressure sensor.

3. The gas volume adaptive dew point control system according to claim 2, characterized in that, The dew point factor parameters are based on dew point factor collection, and the dew point factors are obtained by data analysis based on historical data of all factors that affect the dew point. The dew point factors include: medium stream temperature before JT valve throttling, medium stream temperature after JT valve throttling, medium stream pressure before JT valve throttling, and CH4 mole fraction in the medium.

4. A gas volume adaptive dew point control method, based on the gas volume adaptive dew point control system according to any one of claims 1-3, characterized in that, The control method includes: Collect dew point factor parameters on both sides of the JT valve; The dew point factor parameters are received, converted into digital signals, and then transmitted to the dew point control platform in the central control room of the gas storage facility. The pressure difference of the JT valve is calculated based on the dew point factor parameters, the valve opening angle of the JT valve is calculated based on the pressure difference of the JT valve, and the JT valve is adjusted based on the valve opening angle.

5. The gas volume adaptive dew point control method according to claim 4, characterized in that, The method for calculating the differential pressure of the JT valve based on the aforementioned dew point factor parameters is as follows: Based on the dew point factor parameters, the pressure of the medium stream after throttling is calculated according to the temperature and pressure balance formula; the difference between the pressure of the medium stream after throttling by the JT valve and the pressure of the medium stream before throttling by the JT valve is the pressure difference of the JT valve; The temperature and pressure balance formula is as follows: = ； in, The temperature of the medium stream before throttling by the JT valve. The temperature of the medium stream after throttling by the JT valve. The pressure of the medium flow stream before the JT valve throttling. This is a correction factor for the throttling process of the JT valve. The isentropic index of the throttling process of the JT valve; The pressure of the medium flow after throttling by the JT valve.

6. The gas volume adaptive dew point control method according to claim 5, characterized in that, The method for calculating the valve opening angle of the JT valve based on the pressure difference of the JT valve is as follows: ； in, This refers to the valve opening angle of the JT valve. The pressure difference of the JT valve. This is a correction factor.

7. A gas volume adaptive dew point control device, characterized in that, include: At least one processor; And a memory communicatively connected to at least one of the processors; wherein the memory stores instructions executable by the processor to implement the gas volume adaptive dew point control method according to any one of claims 4-6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are executed by the computer to implement the gas volume adaptive dew point control method according to any one of claims 4-6.

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