Shale gas well pressurization gas lift feed gas automatic distribution device

Abstract

The utility model relates to a shale gas well pressurization gas lift feed gas automatic distribution device which comprises a gathering pipe used for receiving gas from a compressor and supplying gas to branches; the pneumatic regulating valve 1 is used for being linked with a manifold pressure set value to ensure that the manifold pressure is stabilized at the set value, so that the gas lift gas source pressure is optimized; the pneumatic regulating valve 2 is used for being linked with a flow set value, ensuring that the gas injection amount of each gas well is stabilized at a target value and realizing accurate regulation of the flow; the flow meter is used for monitoring and metering the flow of the medium passing through each gas lift branch in real time and ensuring accurate metering in the gas lift process; the temperature and pressure measuring ring is used for monitoring the temperature and the pressure of the medium; and a plurality of gas lift branches, each branch being equipped with a regulating and metering device to provide a gas lift amount to a designated gas well.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas (shale gas) production and transportation devices, and specifically relates to an automatic distribution device for pressurized gas lift raw gas in a shale gas well. Background Art

[0002] Currently, the use of gas lift to dewater gas wells, increasing gas transmission pressure and thereby reducing production pressure, is an effective process that benefits gas well production and increases output. Dewatering gas recovery technology is a key measure to unlock the production potential of water-bearing gas reservoirs or pressure-induced gas wells, thereby improving gas reservoir recovery. Since the 1950s, when the United States first used pumpjacks to dewater small and medium-volume gas wells, a number of mature single-well dewatering gas recovery technologies have been developed abroad, including tubing optimization, mechanical pumping, bubble drainage, gas lift, plunger lift, electric submersible pumps, jet pumps, gas jet pumps, and progressive cavity pumps. In recent years, developments in these relatively mature technologies have primarily focused on the development of supporting new equipment. New dewatering gas recovery technologies are also being researched and applied abroad, including concentric capillary technology, continuous natural gas circulation, downhole gas-liquid separation and reinjection within the same well, downhole dewatering gas recovery processes, and dewatering gas recovery with compressors.

[0003] my country's drainage gas recovery technology, exemplified by the Sichuan Basin and Southwest Oil and Gas Field Branch, has developed a comprehensive suite of six drainage gas recovery technologies: bubble drainage, gas lift, mechanical pumping, optimized tubing, electric submersible pumps, and jet pumps. Based on these technologies, a combined drainage gas recovery process of gas lift / bubble drainage and mechanical pumping / jet has been developed and applied. The principle of gas lift drainage gas recovery is to use high-pressure gas injected from the casing to gradually activate several gas lift valves installed on the tubing string, gradually lowering the liquid level in the tubing string and restoring production in water-flooded gas wells. Gas lift drainage gas recovery utilizes the energy of high-pressure natural gas (either from a high-pressure gas well or compressed natural gas) to inject high-pressure natural gas into the wellbore of a water-producing gas well. Using downhole gas lift valves, the system removes accumulated liquid and restores production. Based on the principles of the drainage devices, these methods can be categorized as gas lift valve drainage gas recovery and plunger clearance drainage gas recovery. Gas lift valve drainage gas recovery is a commonly used drainage gas recovery method in gas fields, while plunger clearance drainage gas recovery is still in the experimental stage in Chinese gas fields.

[0004] Judging from the current shale gas extraction situation in Sichuan, the self-flowing capacity of most shale gas wells will decline rapidly after 3 to 5 years of continuous production. However, the shale gas reserves in the formation are still large and have great extraction value. It is currently important to extend the production life of the gas wells and increase the output of shale gas wells by taking various technological measures. Currently, gas lift drainage and pressurized transportation are the most important shale gas extraction technological measures in Sichuan.

[0005] A significant problem with current gas lift and pressurization systems is the inconvenience of automatically adjusting the lift and pressurization gas volumes as needed, as well as the difficulty in automatically adjusting the demand for each gas well. In shale gas pressurization and gas lift production sites, as the gas lift process progresses, the gas well liquid level continuously decreases, and the gas production gradually increases. The existing gas lift and pressurization systems have certain limitations and irrationalities in their adjustment capabilities.

[0006] The current gas lift system uses a topology where the cylinder discharge port of the compressor is directly connected to the gas well casing. This requires that the entire gas source be injected into the gas well. Fixed throttle valves are used at the site to control and regulate gas demand.

[0007] Disadvantages of existing technology:

[0008] 1. The bypass piping system is missing

[0009] The current gas lift system adopts a topological structure in which the discharge port of the compressor gas lift system cylinder is directly connected to the gas well casing, which means that the gas source for gas lift must be fully injected into the gas well.

[0010] This process structure suffers from two technical deficiencies. First, it is difficult to dynamically match casing pressure fluctuations with the optimal gas injection rate during the different stages of the gas lift process (including production resumption, auxiliary liquid drainage, and steady-state maintenance). Second, the operating mode relies on manual adjustment of the compressor inlet pressure and discharge pressure reflux ratio, resulting in significant inefficient power loss and making it difficult to achieve optimal gas volume configuration under all operating conditions.

[0011] 2. Imperfect thermodynamic monitoring system

[0012] A drilling platform typically houses 3-6 shale gas wells, each with distinct production conditions and varying oil and casing pressures. Currently, the integrated units used for gas lift and pressurization in most shale gas wells are designed for a single drilling platform and cannot accommodate wells with varying operating conditions. Increasing the gas source pressure to meet the injection needs of the highest casing pressure wells can significantly exacerbate the throttling and temperature drop effects in low casing pressure wells. This can lead to pipeline blockages such as hydrates or ice formation when the temperature drops below a certain value, resulting in interruptions in gas lift and production, or even well failure. While external electric heating can be used as an auxiliary, the risk of gas lift interruption cannot be eliminated.

[0013] 3. Lack of automatic control function

[0014] The existing gas distribution system has obvious defects in the control of key parameters such as gas source pressure stability and gas injection volume accuracy, which makes it impossible to optimize the gas well production system and difficult to achieve the goal of high gas production of gas wells.

[0015] 4. No remote monitoring function

[0016] The existing gas distribution system lacks data acquisition, transmission and remote control functions, resulting in timely response to gas lift parameter adjustments and delayed process system optimization, making it difficult to ensure that the gas well is in the optimal operating state. Utility Model Content

[0017] This utility model aims to solve the above problems of the prior art. It proposes an automatic distribution device for pressurized gas lift feed gas in shale gas wells. The technical solution of this utility model is as follows:

[0018] A shale gas well pressurized gas lift feed gas automatic distribution device comprises: a manifold for receiving gas from a compressor and supplying gas to each branch; a pneumatic regulating valve-A for linking with the manifold pressure setting value to ensure that the manifold pressure is stable at the set value, thereby optimizing the gas lift gas source pressure; a pneumatic regulating valve-B for linking with the flow setting value to ensure that the gas injection volume of each gas well is stable at a target value, thereby achieving precise flow regulation; a flow meter for real-time monitoring and metering of the medium flow through each gas lift branch to ensure accurate metering during the gas lift process; a temperature and pressure measuring ring for monitoring the temperature and pressure of the medium; and multiple gas lift branches, each branch being equipped with regulating and metering equipment to provide the gas lift volume to a designated gas well.

[0019] Furthermore, it also includes an integrated pressure-regulating bypass pipeline, which is used to input redundant gas into the downstream pipeline network when the gas volume pressurized by the gas lift system cylinder is greater than the total demand of each gas well, thereby realizing flexible distribution of gas source between gas lift demand and pipeline transportation.

[0020] Furthermore, it also includes an intelligent remote control management system, which realizes remote data collection, monitoring and control through the SCADA system to ensure timely adjustment of gas lift boost gas volume and the optimal state of gas well operation.

[0021] Furthermore, a check valve is included, which is placed downstream of each gas lift branch to prevent the reverse flow of the downstream medium, ensure the positive flow of the gas lift process, and thus avoid the decrease in gas lift efficiency due to backflow.

[0022] Furthermore, it also includes a temperature sensing network and early warning mechanism to monitor the gas source temperature. When the temperature is lower than 50°C, the protection program is automatically triggered to prevent hydrate formation.

[0023] Furthermore, it also includes a pneumatic shut-off valve. When the pressure downstream of the manifold reaches a preset threshold, the pneumatic shut-off valve automatically closes to protect the downstream pipeline. The preset threshold can be remotely modified to adapt to different gas well operating conditions.

[0024] Furthermore, the adjustment of the manifold pressure setting value includes a calculation module that matches the gas well demand, and the module automatically calculates and adjusts the setting value according to the actual gas injection demand of the gas well and the performance of the compressor.

[0025] Furthermore, the temperature-pressure coupling monitoring system of the shale gas well pressurized gas lift feed gas automatic distribution device includes a temperature compensation mechanism. When it is detected that the gas source temperature is lower than the set critical value, the heating device is automatically started to ensure that hydrates will not be generated during the gas lift process.

[0026] Furthermore, the pneumatic control valve-A and the pneumatic control valve-B can be finely controlled by a PID controller, which dynamically adjusts the output according to the real-time deviation signal to quickly and accurately adjust the manifold pressure and flow to the set value.

[0027] Furthermore, it also includes a venting system. When the system pressure exceeds the normal range, the venting system can automatically open for safe venting to ensure the safe operation of the entire gas lift system. At the same time, it also meets environmental protection requirements and avoids environmental pollution caused by gas leakage.

[0028] The innovations of this utility model are mainly reflected in the following aspects:

[0029] 1. Integrated pressure-regulating bypass piping and dynamic pressure-gas volume balance mechanism: Traditional gas lift systems lack flexible means to adjust the gas injection volume to the gas well demand. This utility model introduces an integrated pressure-regulating bypass piping to achieve automatic diversion when the gas volume exceeds the gas well demand. This not only eliminates the risk of overpressure, but also develops the dual functions of "gas lift and pressurization" of the gas lift system cylinder. This is an innovative improvement to existing technologies. Because traditional compressor gas lift systems generally do not consider the issues of excess gas volume and reuse, this design can better match the gas well demand at different stages, improving the overall efficiency and functionality of the system.

[0030] 2. Coupled Temperature and Pressure Monitoring System: By integrating a gas lift source temperature sensing network and an early warning mechanism, this utility model monitors the temperature of the pipeline medium in real time. When the temperature drops to a critical level that could lead to hydrate formation or ice blockage, a protective program is automatically activated. This represents a significant improvement over conventional processes, as previous systems typically lack such real-time temperature monitoring and automatic protection mechanisms. The key to this innovation lies in its integration of thermodynamic principles and automated control technology, effectively preventing pipeline blockages without interrupting gas lift, a feat difficult to achieve using conventional technologies.

[0031] 3. Establishment of an adaptive control system: This includes an automatic pressure adjustment mechanism and an automatic flow adjustment mechanism, which enables the utility model to dynamically adjust the gas source pressure and gas injection volume according to the actual needs of the gas well, ensuring that the compressor operates in the most efficient state. This adaptive capability breaks the limitations of traditional fixed throttling stop valve control, improves the intelligence level of the system, reduces manual intervention, and reduces energy consumption. The difficulty of this innovation lies in the need to comprehensively consider the different production stages and complex working conditions of the gas well, as well as the performance parameters of the compressor, to implement a precise and stable control algorithm. This is not obvious and cannot be easily achieved with conventional technology.

[0032] 4. Intelligent Remote Control Management System: Through the SCADA data acquisition and monitoring system, this utility model can remotely monitor and adjust gas lift boost volume, as well as monitor actual gas well production in real time, enabling timely adjustments to process regulations to ensure optimal well operation. This remote monitoring and adaptive adjustment capability transcends the limitations of typical on-site operations and is not common in conventional technologies. In particular, the integrated intelligent management of multiple parameters such as pressure, temperature, and flow requires highly integrated control technology and network communication support, demonstrating the advanced and innovative nature of this utility model in system management and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a shale gas well pressurized gas lift raw gas automatic distribution device according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and in detail describe the technical solutions in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention.

[0035] The technical solution of the utility model to solve the above technical problems is:

[0036] The utility model relates to an automatic distribution device for pressurized gas lift raw gas in a shale gas well, which realizes the functions of local or remote automatic control and regulation during simultaneous gas lift gas production and pressurized transportation of the gas well.

[0037] The shale gas well pressurized gas lift feed gas automatic distribution device of the utility model has the following functions:

[0038] (1) With pressure-volume self-adaptation function

[0039] ① Integrate a pressure-regulating bypass line to establish a dynamic pressure and gas volume balance mechanism. When the gas volume of the gas lift system cylinder pressurization exceeds the total gas lift demand, the redundant gas volume is input into the downstream pipeline network to eliminate the risk of overpressure, achieve flexible allocation of gas lift gas source between gas lift demand and pipeline network delivery, and develop the dual functions of "gas lift-pressurization" of the gas lift system cylinder;

[0040] ② Build a load balancing control system to fully utilize the rod load of each cylinder bank, release the efficiency of the gas lift system cylinders, share the load of the booster series cylinders, increase the maximum processing capacity of the compressor, and achieve the goals of energy saving and consumption reduction of the compressor and reducing the risk of over-rod loading.

[0041] (2) Establish a temperature-pressure coupling monitoring system

[0042] A gas lift source temperature sensing network and early warning mechanism are deployed to continuously monitor the temperature of the pipeline medium. When the throttling temperature drops below the critical value, a protection program is automatically triggered to prevent hydrate formation and ice blockage.

[0043] (3) Establish an adaptive control system

[0044] ① Establish an automatic pressure regulation mechanism to achieve the minimum gas source pressure control under the gas lift conditions and reduce the energy consumption of the compressor;

[0045] ② Establish an automatic flow adjustment mechanism to realize the automatic flow adjustment function with the gas injection volume as the target value, and ensure the stability of the gas injection volume of each well.

[0046] (4) Establish an intelligent remote control management system

[0047] Through the configuration, monitoring and control of communication and SCADA data acquisition and monitoring systems, the operating status of the shale gas well pressurized gas lift automatic distribution device is clarified, the gas lift pressurization gas volume is adjusted in a timely manner, the configuration realizes the actual production monitoring of the gas well, the process effect is understood, and the process system is adjusted in time to ensure that the gas well is in the optimal operating state.

[0048] This system effectively solves the problems of energy loss, extensive optimization of gas lift system, and control lag in existing gas lift systems by constructing a four-in-one technical system of pressure control, thermodynamic protection, automatic adjustment, and remote monitoring, thereby realizing precise and intelligent management of gas lift technology.

[0049] 1. Manual ball valve: cuts off or connects the connection with the external system, used for the work or shielding work of each branch and maintenance work.

[0050] 2 Safety valve: It works when the pressure of the external transmission pipeline reaches the set value to protect the safety of the pipeline network.

[0051] 3. Pneumatic shut-off valve: When the pressure of the external transmission pipeline reaches the set value, it will be shut off to protect the safety of the pipeline network.

[0052] 4 Pneumatic control valve-A: Linked with the manifold pressure setting value to ensure that the manifold pressure is stable at the set value.

[0053] 5 Pneumatic control valve-B: linked with the flow setting value to ensure that the flow is stable at the set value.

[0054] 6. Flow meter: measures the medium passing through this branch.

[0055] 7 Temperature and pressure measuring ring: monitor the temperature and pressure of the medium entering the manifold.

[0056] 8. Pressure measuring ring: monitors the pressure of each branch.

[0057] 9. Check valve: prevents the downstream medium from flowing backward.

[0058] 10. Venting system: A venting system that safely vents media into the station.

[0059] 11 External transmission pipeline network: The gas volume from the manifold that is greater than the total volume of the gas injection branch goes to the external transmission pipeline network.

[0060] 12 Gas lift branch 1: The set gas lift volume enters the designated gas well 1 that requires gas lift after adjustment and metering.

[0061] 13 Gas lift branch 2: The set gas lift volume enters the designated gas well 2 that requires gas lift after adjustment and metering.

[0062] 14 Gas lift branch 3: The set gas lift volume enters the designated gas well 3 that requires gas lift after adjustment and metering.

[0063] 15 Gas lift branch 4: The set gas lift gas volume enters the designated gas well 4 that requires gas lift after adjustment and metering.

[0064] 16 Gas lift branch 5: The set gas lift volume enters the designated gas well 5 that requires gas lift after adjustment and metering.

[0065] 17 Gas lift branch 6: The set gas lift gas volume enters the designated gas well 6 that requires gas lift after adjustment and metering.

[0066] 18. Manifold: receives gas from the compressor and supplies gas to each branch;

[0067] Overall Concept

[0068] (1) The gas lift volume is based on the optimal gas injection volume of the gas well, and the excess gas volume enters the outbound process in the form of incremental gas volume.

[0069] (2) When the high-pressure system of the integrated compressor is switched to the gas lift function, the final exhaust pressure is the lowest while meeting the gas lift volume.

[0070] (3) The gas source temperature of the gas lift is guaranteed to be above 50°C to ensure that the gas does not form hydrates after depressurization.

[0071] (4) The operating data of this skid can be monitored and rewritten on the SCADA data acquisition and monitoring system.

[0072] Control Logic

[0073] (1) Logic of the pneumatic shutoff valve: To ensure the safety of the low-pressure end of the pressure change node, the valve is shut off when the downstream pressure reaches a certain value (8.0M). In this case, the manifold pressure will rise, which may cause the compressor to shut down.

[0074] (2) Determine the manifold pressure (and gas lift pressure). Compare the pressures of all operating gas lift pipelines, select the maximum value, and add a value (which can be rewritten) to the manifold pressure (this pressure is to ensure that the optimal gas lift volume is met under the pressure difference before and after the regulating valve, and also to ensure that the final stage discharge pressure of the compressor high-pressure gas lift process is the lowest). This value is controlled by the associated regulation, and an alarm is triggered when it reaches 13.5MPa.

[0075] (3) Determination of gas lift volume: Set the gas lift volume and pneumatic adjustment: stop, run (manual (manual setting of opening), automatic (associated gas lift volume)).

[0076] In order to illustrate the present invention in more detail, the following specific embodiments are provided:

[0077] Example 1: Implementation of an integrated pressure-regulating bypass pipeline and automatic pressure regulation mechanism for a shale gas well boosting and gas lift feed gas automatic distribution device

[0078] This embodiment relates to an automatic distribution device for shale gas well pressurized gas lift feed gas. Specifically, it is about how to optimize the operating efficiency of the compressor gas lift system by integrating a pressure-regulating bypass pipeline and an automatic pressure adjustment mechanism, prevent overpressure, and achieve flexible distribution of gas sources between gas lift demand and pipeline transportation.

[0079] Step 1: Before evenly distributing the high-pressure natural gas from the compressor to each gas lift branch through the manifold 18, first install an integrated pressure-regulating bypass line. This bypass line is installed between the manifold and the pneumatic shutoff valve 3. This ensures that when the volume of gas pressurized by the gas lift cylinders exceeds the total demand of each gas well, the excess gas is automatically directed to the downstream pipeline network, rather than being wasted through throttling or venting, thereby achieving efficient utilization of the gas source.

[0080] Step 2: Install pneumatic control valve B 5 on manifold 18. This valve is connected to the manifold pressure setpoint and is used to maintain manifold pressure within a stable range. When manifold pressure exceeds the set threshold, pneumatic control valve A automatically opens a bypass line, transferring excess gas to the downstream pipeline. Otherwise, it closes, ensuring that manifold pressure remains within a safe and effective range, meeting the gas lift requirements of the well while preventing compressor shutdown due to overpressure.

[0081] Step 3: Establish a load-balancing control system. This system automatically distributes the gas source by monitoring the rod load of each cylinder bank in real time. This allows the gas lift system cylinders to unleash greater efficiency during gas lift production, while also sharing the load of the booster series cylinders and improving the overall processing capacity of the compressor. The system automatically adjusts the gas source pressure by adjusting the opening of the pneumatic control valve-A to achieve the lowest discharge pressure of the compressor while meeting the gas lift volume requirements, thereby reducing energy consumption.

[0082] Example 2: Application of a temperature-pressure coupling monitoring system for a shale gas well pressurization and gas lift feed gas automatic distribution device

[0083] This embodiment focuses on how to avoid hydrate or ice blockage caused by temperature drop by establishing a complete temperature-pressure coupling monitoring system, thereby ensuring the safety and continuity of the gas lift process.

[0084] Step 1: Install temperature and pressure measuring rings 7 in each gas lift branch to monitor the temperature and pressure of the medium entering the manifold in real time. Set the lower limit of the gas source temperature to 50°C. If the gas source temperature drops to or below this temperature, the protection program is immediately triggered, and heating or other measures are taken to increase the gas source temperature to prevent hydrate formation in the pipeline.

[0085] Step 2: Establish a temperature-pressure coupled monitoring feedback loop based on the linkage between pneumatic control valve B 5 and the flow setpoint. When the temperature sensor detects that the air source temperature is too low, the system automatically adjusts the opening of pneumatic control valve B, reducing the amount of cooling air injected and simultaneously triggering heating equipment (such as electric heating) to maintain the air source temperature above the safety threshold.

[0086] Step 3: Remotely monitor the temperature and pressure of the gas source through the SCADA system. Once an abnormality occurs, an alarm is immediately issued and remote control measures are taken to ensure the continuity and safety of the gas lift process and avoid the risk of gas well shutdown or dead well due to temperature and pressure abnormalities.

[0087] Example 3: Establishment of an intelligent remote control management system for the automatic distribution device of feed gas for shale gas well pressurization and gas lift

[0088] This embodiment aims to achieve timely remote adjustment of gas lift boosting gas volume and monitoring of actual gas well production by establishing an intelligent remote control management system, thereby ensuring that the gas well is always in the optimal operating state.

[0089] Step 1: Install a data acquisition and transmission module on the automatic distribution equipment. This module is connected to the SCADA data acquisition and monitoring system to collect and transmit real-time operating data of the gas lift boosting system, including information such as the pressure, temperature, flow rate of the gas source, and the production and status of the gas well.

[0090] Step 2: In the remote control center, the data of the automatic distribution equipment is monitored in real time through the configuration interface of the SCADA system. According to the actual production situation of the gas well, the gas source pressure, flow rate and other parameters are adjusted to achieve timely remote adjustment of the gas lift boosting gas volume.

[0091] Step 3: Establish a mechanism to monitor gas well production in real time through the SCADA system. If a production drop or other abnormality is detected, the cause is immediately analyzed and the gas lift and pressurization process is adjusted to ensure high gas production and optimal operation. Furthermore, the system can adaptively adjust control strategies based on the different production stages and complex operating conditions of the gas well, reducing manual intervention and improving overall operational efficiency and safety.

[0092] Preferably, a method for automatically distributing feed gas for pressurized gas lift in a shale gas well is also included, specifically comprising the following steps:

[0093] 1. Dynamically adjust the opening of the pneumatic control valve to control manifold pressure and flow: Through the integrated control system, the pressure and flow in the manifold are monitored in real time. The opening of the pneumatic control valve -A4 is dynamically adjusted according to the manifold pressure set point to ensure that the manifold pressure remains stable within the set range. At the same time, the opening of the pneumatic control valve -B5 is adjusted according to the flow set point and the actual needs of each gas well to control the flow through each gas lift branch and achieve precise gas distribution.

[0094] 2. Determine control targets by comparing operating gas lift branch pressures: The system is equipped with pressure gauges 8 to continuously monitor the pressure of each gas lift branch. The control system compares these pressure data in real time and selects the gas lift branch with the highest current pressure as the control target, ensuring that the gas source can prioritize the gas lift needs of high-demand wells. Simultaneously, it adjusts the manifold pressure to achieve the optimal gas distribution plan.

[0095] 3. Monitor and ensure the gas source temperature is above the threshold: The gas source temperature is monitored in real time by the temperature and pressure measuring ring 7. When the gas source temperature drops below 50°C, heating measures are automatically initiated to prevent the formation of hydrates or ice blockage, ensuring the continuity and safety of the gas lift process.

[0096] 4. Remotely monitor and adjust gas lift boost volume through a data acquisition and monitoring system: Utilizing a SCADA data acquisition and monitoring system, the operating status of the automatic distribution skid is remotely monitored, including key parameters such as pressure, flow, and temperature. If any parameter deviates from the set optimal range, the system promptly issues an alarm and remotely adjusts the opening of the pneumatic control valve, or optimizes the gas distribution plan through software algorithms, ensuring precise control of gas lift boost volume and optimal gas well operation. The systems, devices, modules, or units described in the above embodiments can be implemented as computer chips or physical devices, or as products with specific functions.

[0097] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, commodity, or apparatus that includes the element.

[0098] The above embodiments should be understood as merely illustrating the present invention and not as limiting the scope of protection of the present invention. After reading the contents of the present invention, technicians may make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. An automatic distribution device for pressurized gas lift feed gas in shale gas wells, characterized in that: include: The manifold receives gas from the compressor and supplies it to each branch. The pneumatic control valve A is linked to the manifold pressure setting to ensure that the manifold pressure remains stable at the set value, thereby optimizing the gas source pressure for gas lift. The pneumatic control valve B is linked to the flow setting to ensure that the gas injection volume of each gas well remains stable at the target value, achieving precise flow regulation. The flow meter monitors and measures the medium flow through each gas lift branch in real time, ensuring accurate measurement during the gas lift process. A temperature and pressure measuring ring, used to monitor the temperature and pressure of the medium; Multiple gas lift branches, each equipped with regulating and metering equipment to provide gas lift volume to a designated gas well.

2. The automatic distribution device for pressurized gas lift feed gas in shale gas wells according to claim 1, characterized in that: It also includes an integrated pressure-regulating bypass pipeline, which is used to input redundant gas into the downstream pipeline network when the gas volume pressurized by the gas lift system cylinder is greater than the total demand of each gas well, thereby realizing flexible distribution of gas source between gas lift demand and pipeline transportation.

3. The automatic distribution device for shale gas well pressurized gas lift feed gas according to claim 1, characterized in that: It also includes an intelligent remote control management system, which realizes remote data collection, monitoring and control through the SCADA system to ensure timely adjustment of gas lift boosting gas volume and optimal operation of gas wells.

4. The automatic distribution device for shale gas well pressurized gas lift feed gas according to claim 1, characterized in that: It also includes a check valve, which is placed downstream of each gas lift branch to prevent the reverse flow of the downstream medium and ensure the positive flow of the gas lift process.

5. The automatic distribution device for shale gas well pressurization and gas lift feed gas according to claim 1, characterized in that: It also includes a temperature sensing network and early warning mechanism to monitor the gas source temperature. When the temperature is below 50°C, the protection program is automatically triggered to prevent hydrate formation.

6. The automatic distribution device for shale gas well pressurization and gas lift feed gas according to claim 1, characterized in that: It also includes a pneumatic shut-off valve. When the pressure downstream of the manifold reaches a preset threshold, the pneumatic shut-off valve automatically closes to protect the downstream pipeline. The preset threshold can be remotely modified to adapt to different gas well operating conditions.

7. The automatic distribution device for shale gas well pressurization and gas lift feed gas according to claim 1, characterized in that: The adjustment of the manifold pressure setting value includes a calculation module that matches the gas well demand, and the module automatically calculates and adjusts the setting value according to the actual gas injection demand of the gas well and the performance of the compressor.

8. The automatic distribution device for shale gas well pressurization and gas lift feed gas according to claim 1, characterized in that: The temperature-pressure coupling monitoring system of the shale gas well pressurization gas lift feed gas automatic distribution device includes a temperature compensation mechanism. When it is detected that the gas source temperature is lower than the set critical value, the heating device is automatically started to ensure that hydrates will not be generated during the gas lift process.

9. The automatic distribution device for shale gas well pressurization and gas lift feed gas according to claim 1, characterized in that: The pneumatic control valve-A and the pneumatic control valve-B can be finely controlled by a PID controller, which dynamically adjusts the output according to the real-time deviation signal to quickly and accurately adjust the manifold pressure and flow to the set value.

10. The automatic distribution device for shale gas well pressurization and gas lift feed gas according to claim 1, characterized in that: It also includes a venting system, which can automatically open for safe venting when the system pressure exceeds the normal range.

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