Gas-liquid migration experimental device of gas storage

Abstract

The utility model discloses a gas-liquid migration experimental device of a gas storage, relates to the technical field of gas storage simulation devices, and aims to provide an experimental device capable of simulating the influence of the gas production efficiency of the gas storage on gas well water invasion. The device comprises a sand-filled gas storage, a gas injection and recovery device, a liquid injection device and a detection device. The detection device can detect the change condition of a gas-liquid interface in the sand-filled gas storage in various operation processes of liquid injection, gas injection and gas production. Therefore, by simulating the gas-liquid migration process under different gas production efficiencies and detecting the gas-liquid interface change, equipment is provided for researching the influence of the gas production efficiency on gas well water invasion.

Description

Technical Field

[0001] This application relates to the field of gas storage simulation device technology, and in particular to a gas-liquid transport experimental device for a gas storage facility. Background Technology

[0002] Gas storage facilities are "containers" for storing natural gas. During peak gas demand periods, gas is extracted from these facilities to supplement pipeline supply, ensuring energy availability. During off-peak periods, excess natural gas is stored in the facilities. During gas extraction and injection, the total gas volume in the storage facility changes, causing variations in the gas-water interface. The position of this interface affects extraction efficiency. When the interface is close to the extraction point, well water intrusion occurs. Well water intrusion refers to the phenomenon where water enters the well during extraction, resulting in water content in the extracted gas.

[0003] In existing technologies, simulation devices can simulate the gas injection and gas extraction processes of gas storage facilities.

[0004] There is a lack of simulation equipment in the current technology to study the impact of gas production efficiency on water intrusion in gas wells. Utility Model Content

[0005] The purpose of this application is to provide an experimental device for gas-liquid migration in a gas storage facility, which aims to provide an experimental device that can simulate the effect of gas storage facility production efficiency on water intrusion in gas wells.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a gas-liquid transport experimental device for a gas storage facility, comprising a sand-filled gas storage facility, a gas injection and sampling device, a liquid injection device, and a detection device. The gas injection and sampling device is connected to the sand-filled gas storage facility and is used to inject gas into the facility at various speeds and to collect gas from the facility at various speeds. The liquid injection device is also connected to the sand-filled gas storage facility and is used to inject liquid into the facility. The detection device is used to detect changes in the gas-liquid interface within the sand-filled gas storage facility after the liquid injection device injects liquid into the facility, during gas injection at various speeds by the gas injection and sampling device, and during gas collection at various speeds.

[0008] Gas injection and production devices can harvest gas from sand-filled gas storage tanks at various rates, thus simulating different gas production efficiencies in actual gas storage tanks. Liquid injection devices can inject liquid into sand-filled gas storage tanks; combining the injection and gas harvesting operations of the gas injection and production devices allows for the simulation of actual gas-liquid migration within the storage tank. Monitoring devices can detect changes in the gas-liquid interface within the sand-filled gas storage tank during various operations including liquid injection, gas injection, and gas production. Therefore, by simulating the gas-liquid migration process under different production efficiencies and detecting changes in the gas-liquid interface, equipment is provided for studying the impact of production efficiency on water intrusion in gas wells.

[0009] In some embodiments, the detection device includes a camera. The sand-filled gas storage tank includes a shell and sand filling the shell. The shell has at least one viewing window. The camera is opposite to the viewing window.

[0010] In some embodiments, the detection device further includes a supplementary light, which is opposite to the visualization window, and the area illuminated by the supplementary light on the visualization window overlaps with the area captured by the camera on the visualization window.

[0011] In some embodiments, a dyeing agent is provided in the sand-filled gas storage tank. The dyeing agent is filled in the sand in the sand-filled gas storage tank, and after the liquid injection device injects liquid into the sand-filled gas storage tank, the dyeing agent can separate from the sand and mix with the liquid.

[0012] In some embodiments, a gas injection and extraction cylinder is embedded in the sand-filled gas storage tank, and at least one gas injection and extraction hole is provided on the side wall of the gas injection and extraction cylinder. The gas injection and extraction device is connected to the gas injection and extraction cylinder.

[0013] In some embodiments, there are multiple injection and production gas cylinders, and the gas injection and production device may be selectively connected to one of the multiple injection and production gas cylinders.

[0014] In some embodiments, the gas injection and extraction device includes an injection device and a extraction device. The injection device is used to inject gas into the sand-filled gas storage tank at various speeds. The extraction device is used to extract gas from the sand-filled gas storage tank at various speeds.

[0015] In some embodiments, the gas injection and gas extraction device further includes a connecting device having a first port, a second port, and a third port that are interconnected. The gas injection device is connected to the first port, the second port is connected to a sand-filled gas storage tank, and the gas extraction device is connected to the third port.

[0016] In some embodiments, the gas injection and gas extraction device further includes a control valve assembly. The control valve assembly is used to prevent gas output from the gas injection device from entering the gas extraction device when the gas injection device injects gas into the sand-filled gas storage tank, and to prevent extracted gas from entering the gas injection device when the gas extraction device extracts gas from the sand-filled gas storage tank.

[0017] In some embodiments, the control valve assembly includes a one-way valve. The one-way valve is disposed between the gas injection device and the first port, and the one-way valve allows gas output from the gas injection device to enter the first port while preventing gas from the first port from entering the gas injection device.

[0018] In some embodiments, the gas extraction device includes a gas-liquid separator, a liquid collection device, and a gas collection device. The gas-liquid separator is connected to a sand-filled gas storage tank and includes a liquid outlet and a gas outlet. The liquid collection device is connected to the liquid outlet. The gas collection device is connected to the gas outlet.

[0019] In some embodiments, the gas collection device includes a sealed liquid storage tank and a gas volume measuring device. The sealed liquid storage tank is connected to the exhaust port of the gas-liquid separation device and has a drain port. The gas volume measuring device is connected to the drain port of the sealed liquid storage tank. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the gas-liquid transport experimental device of the gas storage tank in some embodiments of this application;

[0022] Figure 2 A gas-liquid interface diagram detected by the detection device provided in this application when the gas injection and gas sampling rate is appropriate;

[0023] Figure 3 A gas-liquid interface diagram detected by the detection device provided in this application when the gas injection and gas sampling rate is too fast;

[0024] Figure 4 for Figure 1 The structural diagram of the shell provided in the document;

[0025] Figure 5 for Figure 1 The top view of the casing provided in the diagram;

[0026] Figure 6 for Figure 4 The structural diagram of the base plate provided in the document.

[0027] Figure label:

[0028] 100-Gas-Liquid Transport Experimental Apparatus for Gas Storage;

[0029] 1-Sand-filled gas storage tank; 11-Shell; 111-Bottom plate; 112-Side plate; 113-Top plate; 114-Groove; 12-Visual window; 13-Injection and production gas cylinder; 131-Injection and production gas port; 14-Pressure detection device;

[0030] 2-Gas injection and sampling device;

[0031] 21-Gas injection device; 211-Gas cylinder; 212-Gas flow device; 213-Gas cylinder control valve; 214-Pressure gauge;

[0032] 22-Gas sampling device; 221-Gas-liquid separation device; 222-Liquid collection device; 223-Gas collection device; 224-Sealed storage tank; 225-Gas volume measuring device; 23-Connecting device; 24-Control valve assembly; 241-First valve; 242-Second valve; 243-Third valve; 244-Check valve;

[0033] 3-Liquid injection device;

[0034] 4-Detection device; 41-Camera; 42-Fill light. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0039] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0040] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0041] like Figure 1 As shown, this application provides a gas-liquid transport experimental device 100 for a gas storage tank. To facilitate the description of the embodiments below, before introducing the embodiments of this application, some technical terms that will be mentioned in the embodiments of this application will be introduced first, specifically:

[0042] Gas storage: This refers to containers for storing natural gas. The term "underground gas storage" (UGS) generally refers to underground gas storage facilities. Underground gas storage facilities are artificial gas fields or reservoirs formed by re-injecting commercial natural gas transported through long-distance pipelines into underground spaces. They are typically built near cities where downstream natural gas users are located. Gas storage facilities operate on an annual cycle, with "gas extraction in winter and spring, and gas injection in summer and autumn" being the standard operating procedure for gas storage facilities in my country.

[0043] Gas well water intrusion: During the gas extraction process in a gas storage facility, when the extraction speed is too fast, a negative pressure environment will be formed near the extraction point. Water in the gas storage facility will be rapidly moved towards the extraction point under the influence of the negative pressure, thus intruding into the gas well. This phenomenon, which results in a large amount of water being extracted during the gas extraction process, is called gas well water intrusion.

[0044] See also Figure 1 This application provides a gas-liquid transport experimental device 100 for a gas storage facility, including a sand-filled gas storage facility 1, a gas injection and sampling device 2, a liquid injection device 3, and a detection device 4.

[0045] Among them, the gas injection and gas collection device 2 is connected to the sand-filled gas storage tank 1, and is used to inject gas into the sand-filled gas storage tank 1 at various different speeds, and to collect gas in the sand-filled gas storage tank 1 at various different speeds.

[0046] In actual gas storage facility operation, the rates of gas extraction and injection are not fixed but are adjusted according to various factors such as peak and off-peak gas consumption. The gas injection and extraction device 2 can inject and extract gas at multiple different rates, realistically simulating the operating status of the gas storage facility at different times, making the experimental results more valuable for reference.

[0047] For example, gases include, but are not limited to: elemental gases (nitrogen, hydrogen, oxygen), compound gases (methane, carbon monoxide, ethylene), and inert gases (helium, neon, argon, krypton).

[0048] The liquid injection device 3 is connected to the sand-filled gas storage tank 1 and is used to inject liquid into the sand-filled gas storage tank 1.

[0049] For example, liquids include, but are not limited to: water, brine, crude oil solutions, and organic solvents. The following will use water as an example for further explanation.

[0050] It should be noted that the gas injected into the sand-filled gas storage tank 1 and the liquid injected into the sand-filled gas storage tank 1 are not likely to undergo chemical reactions or will not undergo chemical reactions. At the same time, the gas injected into the sand-filled gas storage tank 1 and the liquid injected into the sand-filled gas storage tank 1 are not likely to be miscible or will not be miscible.

[0051] The detection device 4 is used to detect the changes in the gas-liquid interface in the sand-filled gas storage tank 1 when the injection device 3 injects liquid into the sand-filled gas storage tank 1, the gas injection and gas collection device 2 injects gas into the sand-filled gas storage tank 1 at various different speeds, and the gas in the sand-filled gas storage tank 1 is collected at various different speeds.

[0052] When using the gas-liquid transport experimental apparatus, liquid can first be injected into the sand-filled gas storage tank 1 through the liquid injection device 3 to simulate water or other solutions in the gas storage tank. Then, gas is injected into or extracted from the sand-filled gas storage tank 1 through the gas injection and extraction device 2 to simulate injecting or extracting natural gas into the gas storage tank. During this process, the changes in the gas-liquid interface within the sand-filled gas storage tank 1 are detected and recorded by the detection device 4. By analyzing the changes in the gas-liquid interface within the gas storage tank, the optimal gas injection rate and gas extraction rate can be determined.

[0053] Thus, by simulating the gas-liquid migration process under different gas production or injection efficiencies and detecting changes in the gas-liquid interface, equipment is provided for studying the impact of gas production efficiency on water intrusion in gas wells.

[0054] like Figure 2 and Figure 3 As shown, Figure 2The image shows the gas-liquid interface when the gas injection and gas collection rate is appropriate. Figure 3 The image shows the gas-liquid interface when the gas injection and sampling rate is too high. It should be noted that... Figure 2 what Figure 3 The left side of the middle section shows the gas injection and gas collection device, while the right side shows the liquid injection device.

[0055] The embodiments of this application will be described in detail below with reference to the accompanying drawings, and the application scenarios of the embodiments of this application will be introduced first before the detailed description of the embodiments of this application.

[0056] The gas-liquid migration experimental device 100 provided in this application is used to simulate the effect of gas production efficiency on water intrusion in gas wells during the process of injecting gas into the gas storage.

[0057] The gas-liquid transport experimental device 100 for gas storage provided in this application can be applied to: the design of gas storage facilities, the construction of gas storage facilities, the use of gas storage facilities, research institutions, universities, and related talent training and technical training.

[0058] See also Figure 1 In some embodiments, the detection device 4 includes a camera 41. The sand-filled gas storage tank 1 includes a shell 11 and sand filling the shell 11. The shell 11 is provided with at least one viewing window 12. The camera 41 is opposite to the viewing window 12.

[0059] Researchers or users can directly observe the changes in the gas-liquid interface inside the sand-filled gas storage tank 1 through the visualization window 12.

[0060] By filling the sand-filled gas storage tank 1 with sand, the interaction between the sand and the gas and liquid can be clearly observed, such as the flow path of gas in the pores of the sand and the infiltration of liquid in the sand. This helps to deepen the understanding of the transport mechanism of gas and liquid in porous media.

[0061] For example, the sand-filled gas storage tank 1 can also be filled with other granular porous media, such as gravel or ceramic particles.

[0062] Camera 41 can directly capture the changes in the gas-liquid interface inside the sand-filled gas storage tank 1 through the visualization window 12. Researchers can intuitively observe the shape, position, and dynamic changes of the gas-liquid interface over time, providing visual data for analyzing the gas-liquid transport patterns.

[0063] For example, multiple visualization windows 12 can be set. The number of visualization windows 12 includes, but is not limited to: 1, 2, 3, 4, 5, 6, 7, 8 or more.

[0064] Camera 41 is opposite to visualization window 12. It should be noted that the portion of the image captured by camera 41 can be larger or smaller than visualization window 12.

[0065] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the housing 11 includes a bottom plate 111, four side plates 112, and a removable top plate 113. The four side plates 112 are sealed together, the bottom plate 111 is sealed together with all four side plates 112, and the top plate 113 is removably connected to the four side plates 112.

[0066] For example, the top plate 113 is connected to the four side plates 112 by bolts.

[0067] For example, the visualization window 12 is disposed on two opposite side panels 112 of the four side panels 112.

[0068] For example, both the bottom plate 111 and the top plate 113 are provided with grooves 114, and the side plate 112 is located in the grooves 114 of the bottom plate 111 and the top plate 113. In this way, the sealing performance of the sand-filled gas storage tank 1 can be increased.

[0069] For example, the sand-filled gas storage tank 1 also includes a sealing element, which is disposed in the groove 114. The side plate 112 is connected to the bottom plate 111 through the sealing element, and the side plate 112 is connected to the top plate 113 through the sealing element.

[0070] See also Figure 1 In some embodiments, the sand-filled gas storage tank 1 includes a pressure detection device 14, which is connected to the housing 11 and is used to detect the gas pressure inside the housing 11.

[0071] In some embodiments, see continue to see Figure 1 The detection device 4 also includes a supplementary light, which is opposite to the visualization window 12, and the area illuminated by the supplementary light on the visualization window 12 overlaps with the area captured by the camera 41 on the visualization window 12.

[0072] Because the environment inside the sand-filled gas storage tank 1 is dim, it is not convenient to observe changes in the gas-liquid interface. The supplementary light can provide stable and sufficient light to ensure that the area captured by the camera 41 has sufficient brightness, so that the camera 41 can clearly capture the gas-liquid movement inside the sand-filled gas storage tank 1, and reduce the impact of insufficient light on the observation of experimental phenomena and the recording of data caused by blurry or dark images.

[0073] For example, the area illuminated by the fill light on the visualization window 12 completely overlaps with the area captured by the camera 41 on the visualization window 12.

[0074] For example, the area illuminated by the fill light on the visualization window 12 falls within the shooting area of ​​the camera 41 on the visualization window 12.

[0075] For example, the shooting area of ​​camera 41 in visualization window 12 falls within the illumination area of ​​the fill light on visualization window 12.

[0076] In some embodiments, see continue to see Figure 1 The sand-filled gas storage tank 1 is equipped with a dyeing agent. The dyeing agent is filled into the sand in the sand-filled gas storage tank 1. After the liquid injection device 3 injects liquid into the sand-filled gas storage tank 1, the dyeing agent can separate from the sand and mix into the liquid.

[0077] In some embodiments, a dye is provided in the water injected into the sand-filled gas storage tank 1.

[0078] The dye gives the water color, creating a striking contrast with the surrounding environment in the gas storage facility and making the gas-liquid interface clearly visible.

[0079] In some embodiments, see continue to see Figure 1 and Figure 2 The sand-filled gas storage tank 1 is equipped with an injection and extraction gas cylinder 13. The side wall of the injection and extraction gas cylinder 13 is provided with at least one injection and extraction gas hole 131. The gas injection and extraction device 2 is connected to the injection and extraction gas cylinder 13.

[0080] The injection and production gas cylinder 13 serves as an injection channel, enabling precise injection of gas into a designated location within the sand-filled gas storage tank 1 through the injection and production gas port 131.

[0081] This allows researchers to control and regulate the gas injection and extraction process using the gas injection and extraction device 2. Parameters such as injection pressure and extraction rate can be flexibly changed according to experimental needs to study the gas-liquid migration patterns and changes in the mechanical properties of the sand-filled gas storage tank 1 under different parameter conditions.

[0082] Actual gas storage facilities use injection and production wells to inject and extract gas. In the sand-filled gas storage facility 1, injection and production gas cylinders 13 and injection and production gas holes 131 are installed to more closely resemble the structure and operating conditions of a real gas storage facility. This allows for more accurate simulation of various physical phenomena and processes during the injection and production process of a gas storage facility under laboratory conditions.

[0083] For example, the number of injection and extraction holes 131 provided on the side wall of the injection and extraction cylinder 13 includes, but is not limited to: 1, 2, 3, 4, 5, 6, 7, 8 or more.

[0084] In some embodiments, see continue to see Figure 1 There are multiple injection and extraction gas cylinders 13, and the gas injection and extraction device 2 can be selectively connected to one of the multiple injection and extraction gas cylinders 13.

[0085] By placing multiple injection and extraction gas cylinders 13 at different locations, injection and extraction conditions at different locations within the gas storage facility can be simulated. Researchers can change the injection or extraction location by connecting different injection and extraction gas cylinders 13 according to experimental needs, thereby simulating various injection and extraction conditions, such as injecting gas from the edge of the gas storage facility or extracting gas from the center. This allows for a more comprehensive study of the transport patterns and storage characteristics of gas at different locations and under different conditions within the sand-filled gas storage facility 1.

[0086] Actual gas storage geological conditions are often heterogeneous, and multiple injection and production gas cylinders 13 can better simulate this heterogeneity.

[0087] There are mutual influences among the multiple injection and production gas cylinders 13. Researchers can conduct injection and production experiments by alternating different injection and production gas cylinders 13 to analyze the gas interference effect, pressure transmission law, and comprehensive impact on the surrounding sand and liquid at different injection and production locations.

[0088] For example, the number of injection and extraction gas cylinders 13 includes, but is not limited to, 1, 2, 3, 4, 5, 6, 7, 8 or more.

[0089] For example, multiple gas injection and production cylinders 13 can be arranged in a rectangular array, or randomly, or proportionally set according to the location of the actual gas storage corresponding to the gas production well.

[0090] In some embodiments, see continue to see Figure 1 The gas injection and extraction device 2 includes an injection device 21 and an extraction device 22. The injection device 21 is used to inject gas into the sand-filled gas storage tank 1 at various speeds. The extraction device 22 is used to extract gas from the sand-filled gas storage tank 1 at various speeds.

[0091] By injecting and extracting gas at various speeds, the gas injection and extraction process of an actual gas storage facility can be simulated more accurately under different production stages, seasons, and market demands.

[0092] For example, the gas injection device 21 includes a gas cylinder 211 and a gas flow meter. The gas cylinder 211 and the gas flow valve are connected in series and connected to the sand-filled gas storage tank 1. The gas cylinder 211 is used to provide the gas source, and the gas flow meter is used to record the gas emission rate.

[0093] In some embodiments, the gas injection device 21 includes a gas cylinder control valve 213 and a pressure gauge 214. The gas cylinder control valve 213 is connected to the gas cylinder 211 and is used to control the discharge rate of gas in the gas cylinder 211. The pressure gauge 214 is used to detect the gas pressure value in the gas cylinder 211.

[0094] In some embodiments, see continue to see Figure 1The gas injection and gas collection device 2 also includes a control valve assembly 24. The control valve assembly 24 is used to prevent the gas output by the gas injection device 21 from entering the gas collection device 22 when the gas injection device 21 injects gas into the sand-filled gas storage tank 1, and to prevent the collected gas from entering the gas injection device 21 when the gas collection device 22 collects gas from the sand-filled gas storage tank 1.

[0095] The control valve assembly 24 can isolate the injection and extraction circuits, preventing gas from flowing between the two circuits unnecessarily, thereby helping to maintain the pressure balance between the injection and extraction sides.

[0096] During gas injection, the control valve assembly 24 prevents the gas output from the gas injection device 21 from entering the gas collection device 22, so that the gas injection process proceeds in a predetermined direction and path, maintaining the stability of the gas injection pressure and flow rate, and enabling the gas to be injected into the sand-filled gas storage tank 1.

[0097] During gas extraction, the control valve assembly 24 prevents the extracted gas from entering the gas injection device 21, ensuring that the gas extraction process is not disturbed, stably extracting gas from the gas storage tank, and maintaining the normal operation of the gas extraction system.

[0098] Meanwhile, the control valve assembly 24 can also control the gas injection efficiency and gas extraction efficiency.

[0099] For example, see [link to previous article] Figure 1 The control valve assembly 24 includes a first valve 241, which is located between the gas cylinder 211 and the gas flow meter. The first valve 241 is used to control the rate of gas emission, i.e., to control the injection rate into the sand-filled gas storage tank 1. This simulates the injection of natural gas into the storage tank.

[0100] In some embodiments, the gas injection and gas extraction device 2 further includes a connecting device 23, which has a first port, a second port, and a third port that are interconnected. The gas injection device 21 is connected to the first port, the second port is connected to the sand-filled gas storage tank 1, and the gas extraction device 22 is connected to the third port.

[0101] The gas injection device 21, the sand-filled gas storage tank 1, and the gas extraction device 22 are connected together through its three interconnected ports, providing an integrated channel for gas injection and extraction. This makes the entire gas injection and extraction system a whole, allowing the gas to flow in a predetermined direction, from the gas injection device 21 to the sand-filled gas storage tank 1 and from the sand-filled gas storage tank 1 to the gas extraction device 22. This avoids backflow and chaotic flow of gas, ensuring the normal operation of the gas injection and extraction process.

[0102] In some embodiments, see continue to see Figure 1The control valve assembly 24 also includes a one-way valve 244. The one-way valve 244 is located between the gas injection device 21 and the first port. The one-way valve 244 allows gas output from the gas injection device 21 to enter the first port and prevents gas from the first port from entering the gas injection device 21.

[0103] During the gas injection process, the one-way valve 244 ensures that the gas output from the gas injection device 21 can only enter the first port in a predetermined direction and then flow to the sand-filled gas storage tank 1, without the gas flowing back into the gas injection device 21 from the first port.

[0104] When the gas injection device 21 stops working or the system malfunctions, the one-way valve 244 can prevent the gas in the first port and subsequent pipeline from flowing back to the gas injection device 21 due to pressure changes, thereby avoiding the impact of reverse pressure on the gas injection device 21.

[0105] In some embodiments, see continue to see Figure 1 The gas extraction device 22 includes a gas-liquid separator 221, a liquid collection device 222, and a gas collection device 223. The gas-liquid separator 221 is connected to the sand-filled gas storage tank 1 and includes a liquid outlet and a gas outlet. The liquid collection device 222 is connected to the liquid outlet. The gas collection device 223 is connected to the gas outlet.

[0106] The gas-liquid separation device 221 can effectively separate the gas-liquid mixture extracted from the sand-filled gas storage tank 1, thereby removing liquid impurities from the gas and improving the purity and quality of the extracted gas.

[0107] Collecting liquids and gases separately allows for independent monitoring and management of the gas and liquid components during the gas extraction process. This enables more accurate understanding of parameters such as gas and liquid flow rates and composition. Furthermore, it allows for simulation of the gas-water ratio collected during water intrusion in gas wells, thereby quantifying the extent of water intrusion.

[0108] In some embodiments, see continue to see Figure 1 The gas collection device 223 includes a sealed liquid storage tank 224 and a gas volume measuring device 225. The sealed liquid storage tank 224 is connected to the exhaust port of the gas-liquid separation device 221, and the sealed liquid storage tank 224 has a drain port. The gas volume measuring device 225 is connected to the drain port of the sealed liquid storage tank 224.

[0109] When the gas separated by the gas-liquid separator 221 enters the sealed liquid storage tank 224 through the exhaust port, the gas occupies the space inside the sealed liquid storage tank 224, squeezing the liquid inside the sealed liquid storage tank 224 out through the drain port. The liquid flows through the drain port to the gas volume measuring device 225. The amount of gas extracted is reflected by the amount of liquid in the gas volume measuring device 225.

[0110] In some embodiments, see continue to see Figure 1 The control valve assembly 24 also includes a second valve 242, which is connected between the gas sampling device 22 and the connecting device 23.

[0111] In some embodiments, see continue to see Figure 1 The control valve assembly 24 also includes a third valve 243, which is connected between the liquid injection device 3 and the sand-filled gas storage tank 1. The third valve 243 is used to control the rate at which liquid is injected into the sand-filled gas storage tank 1.

[0112] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An experimental apparatus for gas-liquid transport in a gas storage tank, characterized in that, include: Sand-filled gas storage facility; The gas injection and collection device is connected to the sand-filled gas storage tank and is used to inject gas into the sand-filled gas storage tank at various different speeds and collect gas from the sand-filled gas storage tank at various different speeds. The liquid injection device is connected to the sand-filled gas storage tank and is used to inject liquid into the sand-filled gas storage tank. The detection device is used to detect the changes in the gas-liquid interface in the sand-filled gas storage tank after the liquid injection device injects liquid into the sand-filled gas storage tank, when the gas injection and gas collection device injects gas into the sand-filled gas storage tank at various different speeds, and when the gas in the sand-filled gas storage tank is collected at various different speeds.

2. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 1, characterized in that, The detection device includes a camera; The sand-filled gas storage tank includes a shell and sand filling the shell; the shell is provided with at least one visualization window; the camera is opposite to the visualization window.

3. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 2, characterized in that, The detection device also includes a supplementary light, which is opposite to the visualization window, and the illumination area of ​​the supplementary light on the visualization window overlaps with the shooting area of ​​the camera on the visualization window.

4. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 2, characterized in that, The sand-filled gas storage tank is equipped with a dyeing agent, which is filled into the sand in the sand-filled gas storage tank. After the liquid injection device injects liquid into the sand-filled gas storage tank, the dyeing agent can separate from the sand and mix into the liquid.

5. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 1, characterized in that, The sand-filled gas storage tank is equipped with an injection and production gas cylinder. The side wall of the injection and production gas cylinder is provided with at least one injection and production gas hole. The gas injection and production device is connected to the injection and production gas cylinder.

6. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 5, characterized in that, The number of gas injection and extraction cylinders is multiple, and the gas injection and extraction device can be selectively connected to one of the multiple gas injection and extraction cylinders.

7. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 1, characterized in that, The gas injection and gas collection device includes: The gas injection device is used to inject gas into the sand-filled gas storage tank at various different speeds. Gas extraction device, used to extract gas from the sand-filled gas storage tank at various speeds.

8. The gas-liquid transport experimental apparatus according to claim 7, characterized in that, The gas injection and gas collection device also includes: The communication device has a first port, a second port, and a third port that are interconnected. The gas injection device is connected to the first port, the second port is connected to the sand-filled gas storage tank, and the gas extraction device is connected to the third port.

9. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 8, characterized in that, The gas injection and gas collection device also includes: A control valve assembly is used to prevent gas output from the gas injection device from entering the gas extraction device when the gas injection device injects gas into the sand-filled gas storage tank, and to prevent the extracted gas from entering the gas injection device when the gas extraction device extracts gas from the sand-filled gas storage tank.

10. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 9, characterized in that, The control valve assembly includes a check valve; The one-way valve is located between the gas injection device and the first port. The one-way valve allows the gas output from the gas injection device to enter the first port and prevents the gas from the first port from entering the gas injection device.

11. The gas-liquid transport experimental apparatus for a gas storage tank according to any one of claims 7-10, characterized in that, The gas extraction device includes: A gas-liquid separation device is connected to the sand-filled gas storage tank, and the gas-liquid separation device includes a liquid outlet and an exhaust outlet; A liquid collection device is connected to the drain port; A gas collection device is connected to the exhaust port.

12. The gas-liquid transport experimental apparatus for a gas storage tank according to claim 11, characterized in that, The gas collection device includes: A sealed liquid storage tank is connected to the exhaust port of the gas-liquid separation device, and the sealed liquid storage tank has a drain port; A gas volume measuring device is connected to the drain port of the sealed liquid storage tank.

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