Gas well cluster energy distribution structure, gas well cluster energy distribution system and method

Abstract

The present invention discloses an energy distribution structure for a gas well cluster, a gas well cluster energy distribution system and method, which relate to the technical field of gas reservoir development such as shale gas, tight gas and coalbed methane. It includes a wellhead part installed at the top of the gas well. The energy distribution part is connected between the tubing and the casing, and includes a first pipeline, a second pipeline and a quadrilateral annular pipeline. One group of opposite pipelines of the quadrilateral annular pipeline are respectively communicated with the first pipeline and the second pipeline, and the other group of opposite pipelines of the quadrilateral annular pipeline are respectively connected with a production gas discharge pipeline and a well cluster energy distribution pipeline; the four sides of the quadrilateral annular pipeline are provided with first control valves. A plurality of well cluster energy distribution pipelines are interconnected through well cluster energy interconnection pipelines. When it is determined that the gas well has a gas-liquid column or liquid accumulation at the bottom of the well, the high-energy gas of the high-energy well is input into the low-capacity well through the well cluster energy interconnection pipeline, and the energy distribution part controls different gas flow directions for the high-energy gas entering the low-capacity well.

Description

Technical Field

[0001] The present invention relates to the technical field of gas reservoir development such as shale gas, tight gas and coalbed methane, and more particularly to an energy distribution structure for a gas well cluster, an energy distribution system and method for a gas well cluster. Background Art

[0002] When the development of gas reservoirs such as shale gas, tight gas and coalbed methane enters the middle and late stages, the formation pressure will gradually decrease, which may lead to edge water breakthrough, bottom water rise and water breakthrough in gas wells. If the produced water cannot be discharged in time, it will accumulate at the bottom of the well, resulting in an increase in bottom hole back pressure and a decrease in gas production. In severe cases, the gas well may stop production due to waterlogging; long-term liquid retention may also seriously pollute and damage the reservoir, thereby affecting the gas well production and gas reservoir recovery rate.

[0003] At present, the methods for discharging bottom hole liquid include pump lifting, velocity string, foam drainage and plunger gas lift, etc.

[0004] As a special form of preferred pipe string, the velocity string does not require well killing and maintenance, and completely relies on the energy of the gas well itself to carry the liquid. The velocity string drainage gas production technology has the advantages of short construction period, quick increase in production effect, long production period and avoiding formation damage, etc., but the pipe string replacement is complex, the operation difficulty is high and the accessories are complex.

[0005] Plunger gas lift has the advantages of simple structure and low cost, and is suitable for low-production wells and high gas-liquid ratio wells. Plunger gas lift is a special intermittent gas lift process, and its principle is to use the produced fluid in the well to lift the plunger and the liquid above it to the wellhead together; the plunger plays an isolation role between the gas and the liquid to reduce gas slippage and liquid fallback. This technology can effectively utilize the formation energy and is especially suitable for wells with high gas-liquid ratio. In addition, plunger gas lift can also prevent wax deposition and hydrate formation, thereby avoiding wellbore blockage and helping to reduce greenhouse gas emissions. However, the surface device of plunger gas lift is relatively complex compared with other gas lift methods, the moving mechanism in the plunger is complex and has a certain degree of unreliability, and the operation and management have a certain degree of difficulty. Finally, plunger gas lift requires a relatively high casing pressure to ensure its normal operation, so it is required that the casing must be able to withstand high pressure, which also increases the requirements and costs for downhole equipment.

[0006] Foam drainage gas production has the characteristics of simple and easy operation, good economy and quick effect. Its main component is surfactant, which is divided into foam drainage agent and foam drainage rod according to its form, and has different usage scenarios. When using the foam drainage agent as the foaming agent, it can be injected through the tubing and annulus. Since the gas well can be continuously produced without shutting down during annulus injection, annulus injection is more widely used. When the gas well pressure is high and the energy is sufficient, the conventional annulus injection agent can easily discharge the wellbore liquid; however, when the formation pressure is too low, the foam drainage method of the conventional annulus injection agent can no longer discharge the liquid smoothly.

[0007] Therefore, drainage gas production technologies such as adjacent well gas lift, plunger lift, foam drainage, blowdown liquid drainage, and pump drainage all have their limited application boundary conditions. For the rapidly changing shale gas well conditions, the frequent switching of various technologies has led to high production costs and significant safety and environmental protection risks. Due to the unstable well conditions, higher technical safety requirements are imposed on surface fluid treatment and pipeline transportation systems, resulting in higher surface engineering costs.

[0008] Currently, drainage gas production process technologies represented by foam drainage, gas lift, rod pumping, optimized tubing string, electric submersible pump, and hydraulic jet pump have been formed. In the application of drainage gas production process technologies, the application has developed from a single process to combined processes such as gas lift + foam drainage, gas lift + plunger, rod pumping + jetting, gas lift + wellhead pressurization, and foam drainage + wellhead pressurization. Single-well drainage has developed into targeted overall gas reservoir treatment. The drainage gas production process design has developed from conventional optimization design to software package system decision-making, and economic evaluation has been included in the drainage gas production process decision-making, making the application of drainage gas production process technologies more scientific, reasonable, and economical.

[0009] However, the above collection methods still cannot achieve a comprehensive drainage gas production effect and are also involved in various cost issues. Therefore, how to provide a drainage gas production structure and method with better effects, lower costs, and more flexible control is an urgent problem for those skilled in the art. Summary of the Invention

[0010] In view of this, the present invention provides a gas well cluster energy distribution structure, a gas well cluster energy distribution system, and a method, aiming to solve the above technical problems.

[0011] To achieve the above objectives, the present invention adopts the following technical solutions:

[0012] A gas well cluster energy distribution structure includes a wellhead part installed at the top of the gas well. The wellhead part has two symmetrically arranged tubing strings and two casing strings. The two tubing strings are located above the two casing strings, and both tubing strings are connected to the tubing string in the gas well. Both casing strings are connected to the annulus formed between the inner wall of the gas well and the tubing string. It further includes: an energy distribution part;

[0013] The energy distribution part is connected between any group of the same-side tubing string and the casing string. The energy distribution part includes a first pipeline connected to the end of the tubing string, a second pipeline connected to the end of the casing string, and a quadrilateral annular pipeline connected between the first pipeline and the second pipeline. One group of opposite pipelines of the quadrilateral annular pipeline are respectively connected to the first pipeline and the second pipeline, and the other group of opposite pipelines of the quadrilateral annular pipeline are respectively connected with a production gas discharge pipeline and a well cluster energy distribution pipeline; first control valves are installed at the four corners of the quadrilateral annular pipeline.

[0014] Through the above technical solution, the present invention provides a valve body pipeline control structure capable of realizing the energy distribution of a gas well group. By controlling the opening and closing of the valve body, the forward gas input, reverse gas input, and positive and negative alternating oscillating input of the tubing-casing can be realized, which has a better energy distribution effect for the well group. Moreover, using this structure for well group energy distribution can greatly save costs.

[0015] Preferably, in the above energy distribution structure of a gas well group, intelligent flow regulating valves are installed on both the production gas discharge pipeline and the well group energy distribution pipeline. The intelligent flow regulating valve can control the flow rate.

[0016] Preferably, in the above energy distribution structure of a gas well group, intelligent flow meters and intelligent pressure gauges are installed on both the first pipeline and the second pipeline. The intelligent flow meter and intelligent pressure gauge can monitor the flow data of the incoming and outgoing gas and transmit the monitored data through the network.

[0017] Preferably, in the above energy distribution structure of a gas well group, downhole DAS / DTS distributed optical fibers are installed on the inner wall of the pipe string, the outer wall of the pipe string, and / or the inner wall of the gas well. The downhole DAS / DTS distributed optical fiber is used to monitor the single-phase natural gas, gas-water two-phase, and single-phase formation water flow information during the gas well production and drainage gas production processes, and data transmission is achieved through the optical fiber. It should be noted that the installation of DAS / DTS optical fibers needs to be completed at the initial stage of well construction, and avoidance of radiation optical fibers should be installed; the optical fibers on the inner wall and outer wall of the pipe string enter the well together with the coiled tubing.

[0018] Preferably, in the above energy distribution structure of a gas well group, a blowout connection pipeline is connected between the tubing and the casing on the side of the wellhead that is not connected to the energy distribution part, and a total blowout pipeline is connected to the blowout connection pipeline; second control valves are installed on both sides of the blowout connection pipeline with respect to the total blowout pipeline. The design of the blowout pipeline is to achieve the ignition negative pressure effect.

[0019] Preferably, in the above energy distribution structure of a gas well group, an intelligent control and real-time display system is further included. Through the intelligent control and real-time display system, the drainage gas production effect is evaluated in real time based on the data of the downhole pressure / flow collector and the data of the DAS / DTS distributed optical fiber.

[0020] The present invention also provides a gas well group energy distribution system, including a plurality of the above energy distribution structures of a gas well group; the plurality of well group energy distribution pipelines are interconnected through well group energy interconnection pipelines.

[0021] Through the above technical solution, the well group energy interconnection pipeline of the present invention parallels all production wells on the gas well platform, can freely match the combination of high-energy gas wells to assist low-energy gas wells, and saves production costs.

[0022] Preferably, in the above gas well group energy distribution system, the number of gas wells is more than three.

[0023] The present invention also provides a distribution method for a gas well group energy distribution system. When it is determined that the gas well has a gas-liquid column or liquid accumulation at the bottom of the well, the high-energy gas from the high-energy well is input into the low-capacity well through the well group energy interconnection pipeline, and the first control valve of the energy distribution unit controls different gas flow directions for the high-energy gas entering the low-capacity well.

[0024] Through the above technical solution, the present invention has three different forms of gas drainage and gas production methods, which can meet different usage requirements.

[0025] Preferably, in the distribution method of the above gas well group energy distribution system, by switching the opening and closing of the first control valve, the high-energy gas enters from the tubing and exits from the casing, or the high-energy gas enters from the casing and exits from the tubing, or the high-energy gas repeatedly alternates between the above two forms. Through the cooperation of the above three forms, different requirements can be met.

[0026] It can be seen from the above technical solutions that compared with the prior art, the present invention discloses a gas well group energy distribution structure, a gas well group energy distribution system and a method. Based on the intelligent identification of the liquid accumulation characteristics of gas wells by flow velocity and pressure, the energy of well groups such as shale gas and tight gas is distributed. The high-energy adjacent well gas is used to assist the low-energy gas wells to carry out gas drainage and gas production work, and other methods such as foam drainage are assisted to make the liquid-lifting load of single wells in the well group reach the optimal efficiency state. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0028] Figure 1 The drawings are schematic diagrams of the gas well group energy distribution structure provided by the present invention;

[0029] Figure 2 The drawings are combined schematic diagrams of the wellhead part and the energy distribution part provided by the present invention;

[0030] Figure 3The attached drawing is a schematic diagram of the energy distribution section provided by the present invention;

[0031] Figure 4 The attached drawing is a schematic diagram of the energy distribution system for a gas well cluster provided by the present invention.

[0032] Wherein:

[0033] 1 - Gas well;

[0034] 11 - Pipe string; 12 - Annulus;

[0035] 2 - Wellhead section;

[0036] 21 - Production tubing; 22 - Casing; 23 - Blowout connection pipeline; 24 - Total blowout pipeline; 25 - Second control valve;

[0037] 3 - Energy distribution section;

[0038] 31 - First pipeline; 32 - Second pipeline; 33 - Quadrilateral annular pipeline; 34 - Production gas discharge pipeline; 35 - Well cluster energy distribution pipeline; 36 - First control valve; 37 - Intelligent flow regulating valve; 38 - Intelligent flowmeter; 39 - Intelligent pressure gauge;

[0039] 4 - Downhole DAS / DTS distributed optical fiber;

[0040] 5 - Well cluster energy interconnection pipeline. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Refer to attached Figure 1 to attached Figure 4 As shown in the attached drawings, the embodiments of the present invention disclose an energy distribution system for a gas well cluster, including a plurality of energy distribution structures for gas well clusters; the energy distribution structure for a gas well cluster includes a wellhead section 2 installed on the top of the gas well 1. The wellhead section 2 has two symmetrically arranged production tubings 21 and two casings 22. The two production tubings 21 are located above the two casings 22, and both production tubings 21 are connected to the pipe string 11 in the gas well 1. Both casings 22 are connected to the annulus 12 formed between the inner wall of the gas well 1 and the pipe string 11. It is characterized in that it further includes: an energy distribution section 3;

[0043] The energy distribution unit 3 is connected between any group of the same-side tubing 21 and casing 22. The energy distribution unit 3 includes a first pipeline 31 connected to the end of the tubing 21, a second pipeline 32 connected to the end of the casing 22, and a quadrilateral annular pipeline 33 connected between the first pipeline 31 and the second pipeline 32. One group of opposite pipelines of the quadrilateral annular pipeline 33 are respectively communicated with the first pipeline 31 and the second pipeline 32, and the other group of opposite pipelines of the quadrilateral annular pipeline 33 are respectively connected with a production gas discharge pipeline 34 and a well group energy distribution pipeline 35; first control valves 36 are respectively installed at the four corners of the quadrilateral annular pipeline 33.

[0044] Multiple well group energy distribution pipelines 35 are interconnected through a well group energy intercommunication pipeline 5.

[0045] To further optimize the above technical solution, intelligent flow regulating valves 37 are installed on both the production gas discharge pipeline 34 and the well group energy distribution pipeline 35.

[0046] To further optimize the above technical solution, intelligent flow meters 38 and intelligent pressure gauges 39 are installed on both the first pipeline 31 and the second pipeline 32.

[0047] To further optimize the above technical solution, a co-well DAS / DTS distributed optical fiber 4 is installed on the inner wall of the pipe string 11, the outer wall of the pipe string 11, and / or the inner wall of the gas well 1.

[0048] To further optimize the above technical solution, a blowout connection pipeline 23 is connected between the tubing 21 and the casing 22 on the side of the wellhead part 2 where the energy distribution unit 3 is not connected. A total blowout pipeline 24 is communicated with the blowout connection pipeline 23; second control valves 25 are respectively installed on both sides of the blowout connection pipeline 23 where it is located on the total blowout pipeline 24.

[0049] To further optimize the above technical solution, an intelligent control and real-time display system is further included.

[0050] In this embodiment, the number of wells on the field platform is often 3 to 11 wells. The energy of high-energy gas wells can be intelligently distributed, the number of high-energy wells and low-energy wells can be intelligently selected. When multiple wells are working, the gas flows from high-energy wells to low-energy wells, reducing production costs and being able to greatly reduce costs such as blowout and gas lift vehicles.

[0051] The distribution method of the gas well well group energy distribution system provided in this embodiment: When it is determined that there is a gas-liquid column or liquid accumulation at the bottom of the gas well 1, the high-energy gas of the high-energy well is input into the low-capacity well through the well group energy intercommunication pipeline 5, and the first control valve 36 of the energy distribution unit 3 controls different gas flow directions for the high-energy gas entering the low-capacity well.

[0052] Specifically, by switching the opening and closing of the first control valve 36, high-energy gas is enabled to enter from the tubing 21 and discharge from the casing 22, or high-energy gas is enabled to enter from the casing 22 and discharge from the tubing 21, or high-energy gas is enabled to repeatedly alternate between the above two forms.

[0053] See Appendix Figure 2 and Appendix Figure 3 When high-energy gas enters from the tubing 21 and discharges from the casing 22: the first control valves 36 in the upper right corner and the lower left corner are opened, and the first control valves 36 in the upper left corner and the lower right corner are closed. After the high-energy gas enters the tubing 21 and then enters the pipe string 11, it discharges from the bottom end of the pipe string 11, ascends through the annulus 12, and finally discharges from the casing 22.

[0054] When high-energy gas enters from the casing 22 and discharges from the tubing 21: the first control valves 36 in the upper left corner and the lower right corner are opened, and the first control valves 36 in the upper right corner and the lower left corner are closed. After the high-energy gas enters the casing 22 and then enters the annulus 12 and descends, it ascends from the bottom end of the pipe string 11 and finally discharges from the tubing 21.

[0055] When the above two forms of alternating switching of high-energy gas are repeatedly achieved, that is, the oscillation mode.

[0056] The distribution method of the gas well cluster energy distribution system provided in this embodiment can be coordinated with the existing gas-lift methods. The technical level and adaptability of the existing single gas-lift process can be referred to Table 1:

[0057] Process Applicable Conditions Maximum Drainage Capacity / (m3·d-1) Maximum Applied Well Depth / m Maximum Well Deviation / (°) Applicable Process Parameters Foam Discharge Intermittent Flow, Weak Flow Wells, Small Water Volume 100 5500 Unrestricted Well Type The water production is less than 30 m³ / day, the water-gas ratio is less than 10 m³ / 10,000 m³, and the tubing-casing pressure difference is less than 6 MPa Gas Lift Water Flooding Recovery, Assisted Drainage and Strong Drainage of Gas Reservoir 800 6058 Unrestricted Well Type Can be divided into direct lift and reverse lift, and gas sources such as adjacent wells and compressors can be used Plunger Low Production, Low Pressure, Small Water Volume, Intermittent Flow Wells 25 4946 54.5 / 68.8 When the bottom-hole flowing pressure related to the wellbore structure is 7 - 13 MPa, the daily water production is < 20 m³, and the water-gas ratio is < 8 m³ / 10,000 m³ Electrical Submersible Pump Recovery and Strong Drainage of Low Pressure Water Flooded Wells 1000 4050 43 Daily Water Production Greater than 30 m3, Gas-Liquid Ratio Greater than 300 m3 / m3 Rod Pump Intermittent Flow Assisted Drainage or Continuous Drainage 60 2500 Usually Vertical Wells Daily Water Production Less than 30 m3 Jet Pump Recovery of Low Pressure Water Flooded Wells or Continuous Drainage 150 3000 Unrestricted Well Type Bottom Hole Flow Pressure Not Less than 6 MPa Screw Pump Recovery of Low Pressure Water Flooded Wells or Continuous Drainage 120 2000 Usually Vertical Wells Bottom Hole Flow Pressure Not Less than 6 MPa

[0058] This embodiment selects different gas-lift methods according to the following method:

[0059] First, judge the production capacity of the gas well, and the flowing well condition is the normal condition.

[0060] When the water-gas ratio < 10 m 3 / 10,000 m 3 , it is in the weak flowing state.

[0061] Further judge the well depth. If the well depth ≤ 3000 m, further judge whether it is a new well. If it is a new well, preferably lower the pipe string. If it is not a new well, further judge the condensate oil content. If the condensate oil content ≥ 30%, the plunger gas lift method is adopted; otherwise, the foam drainage method is adopted.

[0062] If the well depth > 3000 m, further judge the temperature and condensate oil content. When the temperature < 120 °C and the condensate oil content < 30%, the foam drainage method is adopted; otherwise, the wellhead boosting method is adopted.

[0063] In the above methods, they can all act together with the distribution method of the gas well cluster energy distribution system provided in this embodiment.

[0064] When the water-gas ratio ≥ 10 m 3 / 10,000 m 3 , it is in a water-flooded state.

[0065] Further judge the well depth. If the well depth ≤ 3000 m, further judge the gas-liquid ratio.

[0066] If the gas-liquid ratio ≥ 800, further judge the condensate oil content. If the condensate oil content < 30%, use the gas lift + foam drainage method. Otherwise, use the continuous gas lift method.

[0067] If the gas-liquid ratio < 800, further judge the liquid production. If the liquid production ≤ 30 m 3 , use the rod pumping + jetting method. If the liquid production > 30 m 3 , then use the continuous gas lift method.

[0068] If the well depth > 3000 m, use the continuous gas lift method.

[0069] In the above methods, except for the rod pumping + jetting method, they can all act together with the distribution method of the gas well cluster energy distribution system provided in this embodiment.

[0070] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, refer to the description in the method section.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas well group energy distribution system, characterized in that: The invention comprises a plurality of energy distribution structures for a gas well group; the energy distribution structure for a gas well group comprises a wellhead (2) installed at the top of a gas well (1); the wellhead (2) comprises two oil pipes (21) and two casings (22) which are symmetrically arranged; the two oil pipes (21) are located above the two casings (22); the two oil pipes (21) are both connected to a pipe string (11) in the gas well (1); the two casings (22) are both connected to an annulus (12) formed between the inner wall of the gas well (1) and the pipe string (11); the invention is characterized in that the invention further comprises: an energy distribution part (3); The energy distribution part (3) is connected between any group of the oil pipes (21) and the casing (22) on the same side, and comprises a first pipeline (31) connected to the end of the oil pipe (21), a second pipeline (32) connected to the end of the casing (22), and a quadrilateral annular pipeline (33) connected between the first pipeline (31) and the second pipeline (32), wherein one group of opposite pipelines of the quadrilateral annular pipeline (33) is respectively connected to the first pipeline (31) and the second pipeline (32), and another group of opposite pipelines of the quadrilateral annular pipeline (33) is respectively connected to a production gas discharge pipeline (34) and a well group energy distribution pipeline (35); first control valves (36) are respectively installed at the four corners of the quadrilateral annular pipeline (33); The plurality of well group energy distribution pipelines (35) are interconnected via a well group energy intercommunication pipeline (5); When it is determined that the gas well (1) is a gas-liquid column or there is liquid accumulation at the bottom of the well, the high-energy gas of the high-energy well is input into the low-energy well through the well group energy interconnection pipeline (5), and the first control valve (36) of the energy distribution unit (3) controls the different gas flow directions of the high-energy gas entering the low-energy well; By switching the first control valve (36) on and off, the high-energy gas can enter the oil pipe (21) and be discharged from the casing (22), or the high-energy gas can enter the casing (22) and be discharged from the oil pipe (21), or the high-energy gas can repeatedly perform the above two forms of alternating switching; When high-energy gas enters from the oil pipe (21) and is discharged from the casing (22): the first control valves (36) at the upper right corner and the lower left corner are opened, and the first control valves (36) at the upper left corner and the lower right corner are closed, and the high-energy gas enters the oil pipe (21) and then enters the pipe string (11), and then is discharged from the bottom end of the pipe string (11), moves upward from the annulus (12), and finally is discharged from the casing (22); When high-energy gas enters from the casing (22) and is discharged from the oil pipe (21): the first control valves (36) at the upper left corner and the lower right corner are opened, and the first control valves (36) at the upper right corner and the lower left corner are closed, and the high-energy gas enters the casing (22) and then enters the annulus (12) and moves downward, then moves upward from the bottom end of the pipe string (11), and finally is discharged from the oil pipe (21); When the high-energy gas repeatedly switches between the above two modes, that is, the oscillation mode; Choose different drainage and gas collection methods according to the following methods: First, determine the production capacity of the gas well, and the spontaneous flow is normal; When the water-gas ratio is less than 10m 3 / 10,000m 3 When , it is in weak spray state; Further determine the well depth. If the well depth is ≤3000m, further determine whether it is a new well. If it is a new well, run the pipe string. If it is not a new well, further determine the condensate content. If the condensate content is ≥30%, use the plunger gas lift method. Otherwise, use the foam drainage method. If the well depth is greater than 3000m, the temperature and condensate content are further determined. When the temperature is less than 120℃ and the condensate content is less than 30%, the foam drainage method is used. Otherwise, the wellhead pressurization method is used. In the above methods, all of them work together with the distribution method of the gas well group energy distribution system; When the water-gas ratio is ≥10m 3 / 10,000m 3 When , it is flooded; Further determine the well depth. If the well depth is ≤3000m, further determine the gas-liquid ratio; If the gas-liquid ratio is ≥800, the condensate content is further determined. If the condensate content is <30%, the gas lift + bubble drainage method is used. Otherwise, the continuous gas lift method is used. If the gas-liquid ratio is less than 800, further determine the liquid production. If the liquid production is ≤30m 3 When the liquid production is greater than 30m 3 When the pressure is too high, continuous gas lift is used; If the well depth is greater than 3000m, continuous gas lift is used; Among the above methods, except for the mechanical pumping + injection method, all of them work together with the distribution method of the gas well group energy distribution system.

2. A gas well group energy distribution system according to claim 1, characterized in that: Intelligent flow regulating valves (37) are installed on both the production gas discharge pipeline (34) and the well group energy distribution pipeline (35).

3. A gas well group energy distribution system according to claim 1, characterized in that: An intelligent flow meter (38) and an intelligent pressure meter (39) are installed on both the first pipeline (31) and the second pipeline (32).

4. A gas well group energy distribution system according to claim 1, characterized in that: The inner wall of the pipe column (11), the outer wall of the pipe column (11) and / or the inner wall of the gas well (1) are installed with a DAS / DTS distributed optical fiber (4) in the same well.

5. A gas well group energy distribution system according to claim 1, characterized in that: A blowout connecting pipeline (23) is connected between the oil pipe (21) and the casing (22) on the side of the wellhead (2) not connected to the energy distribution unit (3), and the blowout connecting pipeline (23) is connected to a total blowout pipeline (24); and second control valves (25) are respectively installed on both sides of the blowout connecting pipeline (23) located on the total blowout pipeline (24).

6. A gas well group energy distribution system according to claim 1, characterized in that: Also includes intelligent control and real-time display system.

7. A gas well group energy distribution system according to claim 1, characterized in that: The number of the gas wells (1) is more than three.

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