A siphon-proof experimental device and system for salt cavern sediment gap energy storage simulation

Abstract

The application relates to the technical field of salt rock underground energy storage, and discloses an anti-siphon experimental device and system for simulating energy storage in a salt cavern sediment gap, wherein the anti-siphon experimental device comprises an anti-siphon pipe and an exhaust valve; the anti-siphon pipe is a tubular container with open two ends and is vertically arranged; a connecting port is arranged on the side of the anti-siphon pipe and is connected with the outlet of a brine discharge pipeline; the bottom opening of the anti-siphon pipe is connected with a brine collector through a pipeline; the exhaust valve is arranged at the top opening of the anti-siphon pipe and is used for introducing air to cut off the continuous liquid column in the brine discharge pipeline when brine discharge is stopped or the gas injection pressure is lower than the required value for maintaining flow, so that the siphon formation condition is destroyed; and the application can improve the comparability of experimental conditions and engineering practice and the data authenticity.

Description

Technical Field

[0001] This invention relates to the field of underground energy storage technology in salt rock, and in particular to an anti-siphon experimental device and system for simulating energy storage in the voids of salt cavern sediment. Background Technology

[0002] In physical simulation experiments of energy storage in salt cavern sediment pores, to simulate the actual engineering process of injecting gas to drive brine from deep salt caverns to surface treatment facilities, the brine collection container is typically placed at the same or lower level as the simulation chamber. Traditionally, a U-shaped brine discharge pipe is used to connect the pipeline, allowing the pipe to ascend and then descend into the brine container. However, this arrangement creates a continuous siphon effect under gravity after the experiment begins discharging brine, causing the brine to be "automatically drawn" out of the simulation chamber under near-zero pressure differential conditions, rather than being actually "forced out" by the experimental gas. The direct consequence is an abnormally low injection pressure, sometimes even showing zero for extended periods, completely failing to reflect the real high-pressure conditions of overcoming the enormous static pressure head of the brine in deep storage tanks. This distorts the experimental data and fails to provide effective guidance for optimizing the sediment pore gas storage process. Therefore, how to physically cut off the continuous liquid column required for the siphon has become a key technical challenge that urgently needs to be addressed in indoor physical simulation experiments. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-siphon experimental device and system for simulating energy storage in salt cavern sediment pores, aiming to solve or improve at least one of the above-mentioned technical problems and improve the comparability of experimental conditions with engineering practice and the authenticity of data.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides an anti-siphon experimental device for simulating energy storage in the void space of salt cavern sediment, including an anti-siphon pipe and an exhaust valve; The anti-siphon pipe is a tubular container with openings at both ends and is installed vertically. The side of the anti-siphon pipe has a connection port that is connected to the outlet of the brine discharge pipe. The bottom of the anti-siphon pipe is connected to the brine collector through a pipe. The exhaust valve is located at the top of the anti-siphon pipe and is used to introduce air to cut off the continuous liquid column in the brine discharge pipeline when the brine discharge stops or the air injection pressure is lower than the value required to maintain flow, thereby disrupting the siphon formation conditions.

[0005] Optionally, the exhaust valve is an automatic exhaust valve.

[0006] Optionally, the exhaust valve is a normally open micro-pressure valve.

[0007] Optionally, the inlet of the brine discharge pipe is located between the connection port and the top port of the anti-siphon pipe.

[0008] Optionally, the connection port and top port of the anti-siphon pipe are detachably connected to the brine discharge pipe and the brine collector, respectively.

[0009] This invention also provides a salt cavern sediment pore energy storage simulation system, comprising: Box; A gas injection system, located inside the housing, is used to provide a controllable gas source; A liquid phase injection system, installed inside the tank, is used for the supply and metering of brine; A physical simulation system is installed inside the box to contain sediment particles and saturated brine in order to simulate the gas storage environment in the pores of salt cavern sediment. A brine discharge pipeline is connected to the brine discharge outlet of the physical simulation system. Brine collector, used for collecting brine; An anti-siphon experimental device, wherein the side connection port of the anti-siphon tube is connected to the outlet of the brine discharge pipeline, and the bottom port of the anti-siphon tube is connected to the brine collector through a pipeline.

[0010] Optionally, the physical simulation system is a single injection and single discharge system, including a high-pressure chamber, which is equipped with a transparent observation window and a horizontal variable diameter pipe.

[0011] Optionally, the physical simulation system is a two-injection-one-outlet system, including a pair of low-pressure chambers connected by a connecting pipe and an array of pore pressure sensors embedded in the sediment within the low-pressure chambers.

[0012] Optionally, the gas injection system includes a high-pressure nitrogen cylinder, a gas pressure reducing valve, a high-precision gas mass flow controller, and a gas-liquid separator connected in sequence.

[0013] Optionally, the liquid injection system includes a high-precision metering plunger pump, a liquid flow meter, a PLC frequency converter, a water storage tank, a turbidity meter, and a gas flow meter.

[0014] This invention discloses the following technical effects: By setting a vertical anti-siphon pipe and configuring an exhaust valve at its top, air can be actively introduced to the highest point of the pipeline when brine discharge stops or the gas injection pressure is insufficient, thereby precisely disrupting the continuous liquid column condition necessary for the formation of a siphon. This device completely eliminates the siphon effect from a physical perspective, ensuring that a closed liquid column cannot form in the brine discharge pipe at any time. Simultaneously, the high-pressure driven brine discharge process is effectively isolated from the atmospheric pressure gravity collection process through the anti-siphon pipe, ensuring that the gas injection pressure measured in the experiment is entirely used to overcome the sediment resistance and drive the brine out, truly reflecting the pressure consumption of the downhole displacement process. Furthermore, the device has a simple structure and can be seamlessly integrated into various physical simulation systems as an independent module, providing stable, reliable, and realistic boundary conditions for salt cavern sediment void energy storage simulation experiments, and is a fundamental guarantee for obtaining effective experimental data. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the anti-siphon experimental device of the present invention; Figure 3 This is a schematic diagram of the structure of the salt cavern sediment pore energy storage simulation system of the present invention.

[0016] In the diagram: 1. Anti-siphon pipe; 2. Exhaust valve; 3. Connection port; 4. Brine discharge pipe; 5. Brine collector; 6. Housing; 7. High-pressure chamber; 8. Horizontal reducer; 9. Connecting pipe; 10. Low-pressure chamber; 11. High-pressure nitrogen cylinder; 12. Gas pressure reducing valve; 13. High-precision gas mass flow controller; 14. Gas-liquid separator; 15. High-precision metering plunger pump; 16. Liquid flow meter; 17. PLC frequency converter; 18. Water storage tank; 19. Turbidity meter; 20. Gas flow meter. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Reference Figures 1 to 3 This invention provides an anti-siphon experimental device for simulating energy storage in the void space of salt cavern sediment, including an anti-siphon pipe 1 and an exhaust valve 2. The anti-siphon pipe 1 is a tubular container with open ends and is set vertically. A connection port 3 is opened on the side of the anti-siphon pipe 1 and is connected to the outlet of the brine discharge pipeline 4. The bottom of the anti-siphon pipe 1 is connected to the brine collector 5 through a pipeline. The exhaust valve 2 is set at the top of the anti-siphon pipe 1 and is used to introduce air to cut off the continuous liquid column in the brine discharge pipeline 4 when the brine discharge stops or the air injection pressure is lower than the value required to maintain the flow, thereby destroying the siphon formation conditions.

[0020] By vertically arranging the anti-siphon pipe 1 and installing an exhaust valve 2 at the top, the natural effects of gravity and atmospheric pressure are cleverly utilized: when the gas injection drive weakens or stops, the brine in the riser section recedes under gravity, while the exhaust valve 2 introduces air, forming a cavitation at the highest point of the pipeline, completely cutting off the continuity of the liquid column. This physical structure does not rely on any complex electrical or mechanical actions, essentially eliminating the hydrodynamic conditions for siphon formation. This fundamentally solves the siphon interference problem that inevitably arises in indoor simulation experiments where an inverted U-shaped pipe is used due to space limitations, enabling the experimental gas injection pressure data to accurately reflect the high-pressure conditions of deep wells for the first time.

[0021] In this embodiment, the exhaust valve 2 is an automatic exhaust valve. The automatic exhaust valve opens or closes automatically based on changes in internal pipeline pressure and liquid level, requiring no manual intervention. During brine discharge, when the liquid level or pressure decreases, the automatic exhaust valve quickly opens to introduce air, promptly breaking the siphon; during normal air injection and brine discharge, the valve automatically closes to prevent gas leakage. This design improves the automation and repeatability of experimental operations, reduces human error, and is particularly suitable for complex simulation conditions requiring long-term continuous experiments or frequent start-stop cycles for brine discharge.

[0022] In this embodiment, the exhaust valve 2 is a normally open micro-pressure valve. Using a normally open micro-pressure valve means that the top of the anti-siphon tube is always open to the atmosphere. This design, while simple, is extremely reliable—it fundamentally eliminates any possible conditions for the formation of a closed liquid column because there is always a vent point open to the atmosphere at the highest point of the pipeline. Even at extremely low injection pressures, accidental siphon formation will not occur. This solution is extremely low-cost, has no risk of failure of any moving parts, and is particularly suitable for cost-sensitive teaching experiments or basic research platforms with extremely high reliability requirements.

[0023] In this embodiment, the inlet of the brine discharge pipe 4 is located between the connection port and the top opening of the anti-siphon pipe 1. This relative position ensures that the outlet of the brine discharge pipe 4 does not directly extend below the bottom liquid level of the anti-siphon pipe 1, thereby preventing the formation of a liquid seal due to pipe immersion during the brine discharge process. Specifically, when brine discharge stops, the liquid level in the anti-siphon pipe 1 naturally drops below the connection port 3. At this time, the space between the connection port 3 and the top opening becomes a gas phase channel. The air introduced by the exhaust valve 2 can enter the highest point of the rising section of the brine discharge pipe 4 without obstruction along this channel, effectively cutting off the liquid column. This positional design optimizes the gas-liquid separation path and enhances the response speed and reliability of the anti-siphon system.

[0024] In this embodiment, the connection port and top port of the anti-siphon pipe 1 are detachably connected to the brine discharge pipe 4 and the brine collector 5, respectively. Detachable connections, such as flanges, quick-connect fittings, or threaded connections, provide the experimental setup with high flexibility and maintainability. The detachable connection of the anti-siphon pipe 1 allows for seamless integration into any physical simulation system requiring brine discharge, whether it's a single-injection-one-drainage or two-injection-one-drainage system. Its versatility allows researchers to easily disassemble the anti-siphon pipe 1 for cleaning, replacement, or maintenance, preventing sediment particles from accumulating or clogging the pipe after long-term experiments. Furthermore, this modular design allows for the rapid replacement of anti-siphon pipes 1 with different volumes or interface sizes within the same simulation system to adapt to different brine discharge flow rates or different sediment particle sizes, significantly expanding the system's applicability.

[0025] The anti-siphon experimental device is a key component that ensures the physical similarity of the entire salt cavern sediment void energy storage simulation experiment. It solves a fundamental technical obstacle that has long plagued indoor physical simulation experiments, making it possible to accurately simulate deep high-pressure geological processes within a limited laboratory space. This provides a reliable research platform for the process development and optimization of sediment void gas storage technology.

[0026] The present invention also provides a salt cavern sediment void energy storage simulation system, comprising: a housing 6; a gas phase injection system disposed within the housing 6 for providing a controllable gas source; a liquid phase injection system disposed within the housing 6 for supplying and metering brine; a physical simulation system disposed within the housing 6 for containing sediment particles and saturated brine to simulate the gas storage environment in the salt cavern sediment voids; a brine discharge pipeline 4 connected to the brine discharge outlet of the physical simulation system; a brine collector 5 for collecting brine; and an anti-siphon experimental device, wherein the side connection port of the anti-siphon pipe 1 is connected to the outlet of the brine discharge pipeline 4, and the bottom port of the anti-siphon pipe 1 is connected to the brine collector 5 through a pipeline.

[0027] Integrating the anti-siphon device into a complete salt cavern sediment void energy storage simulation system forms a closed-loop process from gas source, liquid source, simulated chamber to brine collection. Due to the intervention of the anti-siphon device, the entire system can operate under realistic pressure-driven conditions: the pressure provided by the gas-phase injection system overcomes sediment resistance and brine discharge pipeline losses, pushing the brine into the anti-siphon pipe for final collection. Key parameters measured during the process, such as the pressure-flow relationship, gas breakthrough pressure, and brine discharge rate, accurately reflect the actual displacement characteristics of the deep salt cavern. This transforms the system from a mere flow demonstration device into a physical simulation platform with engineering similarity, capable of quantitatively studying the impact of different gas injection process parameters on brine discharge efficiency.

[0028] In this embodiment, the physical simulation system is a single-injection, single-outlet system, including a high-pressure chamber 7 equipped with a transparent observation window and a horizontal reducer 8. Furthermore, a back pressure valve is installed on the brine discharge pipeline 4 of the single-injection, single-outlet physical simulation system to control the system back pressure and brine discharge rate. The single-injection, single-outlet configuration, combined with the high-pressure chamber 7 and the transparent observation window, allows for direct observation of the breakthrough behavior of gas in porous sediment media, the gas-liquid interface migration patterns, and the dynamic processes of particle initiation and migration. The addition of the horizontal reducer 8 can simulate the localized surge in flow velocity caused by cross-sectional changes in actual wellbores or pipelines, thereby inducing particle migration and blockage. During the experiment, the anti-siphon device ensures that the pressure difference between the back pressure valve and the upstream pressure accurately reflects changes in pipe blockage or flow resistance, enabling researchers to accurately capture the characteristic increase in injection pressure when sand blockage occurs, providing crucial experimental evidence for sand control process design.

[0029] In this embodiment, the physical simulation system is a two-injection-one-outlet system, comprising a pair of low-pressure chambers 10 connected by a connecting pipe 9 and a pore pressure sensor array embedded within the sediment in the low-pressure chambers 10. The two-injection-one-outlet configuration focuses on simulating seepage processes under low-pressure, slow-speed, or complex boundary conditions. The pair of connected low-pressure chambers 10 can simulate an asymmetric displacement scenario where gas is injected from two different locations and discharged from a common brine outlet. The pore pressure sensor array embedded within the sediment can monitor the pore pressure distribution and dissipation process at different depths and spatial locations in real time. An anti-siphon device ensures stable system back pressure during brine discharge, avoiding false pressure drops caused by siphoning. This ensures that the data collected by the sensor array accurately reflects the propagation of the gas seepage front and the pressure transmission patterns in the porous media of the sediment, which is particularly important for studying the formation mechanism of dominant channels in heterogeneous sediment.

[0030] In this embodiment, the gas phase injection system includes a high-pressure nitrogen cylinder 11, a gas pressure reducing valve 12, a high-precision gas mass flow controller 13, and a gas-liquid separator 14 connected in sequence. This configuration provides the system with a precise, controllable, pure, and dry gas source. The high-pressure nitrogen cylinder 11 provides a stable gas source, the gas pressure reducing valve 12 regulates the initial pressure, and the high-precision gas mass flow controller 13 can precisely set a constant flow or constant pressure injection mode according to experimental requirements. The gas-liquid separator 14 is located before the high-precision gas mass flow controller 13, effectively removing any trace droplets that may be carried in the gas source, protecting the high-precision gas mass flow controller 13, and preventing liquid from interfering with the gas metering accuracy. With the anti-siphon device ensuring the accuracy of the system pressure difference, this gas phase injection system can accurately establish a quantitative relationship between the injection pressure and the brine discharge rate, providing reliable data for optimizing the injection process parameters.

[0031] In this embodiment, the liquid phase injection system includes a high-precision metering plunger pump 15, a liquid flow meter 16, a PLC frequency converter 17, a water storage tank 18, a turbidity meter 19, and a gas flow meter 20. This liquid phase injection system not only achieves precise injection and metering of brine but also provides process monitoring capabilities. The high-precision metering plunger pump 15, in conjunction with the liquid flow meter 16 and the PLC frequency converter 17, forms a closed-loop control system to achieve brine saturation and displacement at a constant flow rate or constant pressure. The turbidity meter 19 monitors the turbidity of the discharged brine online, indirectly reflecting whether fine sediment particles are carried during the discharge process, thereby assessing the degree of particle migration. The gas flow meter monitors the gas flow rate accompanying the liquid discharge in the brine discharge pipeline 4, and is a key parameter for analyzing the gas-liquid two-phase flow pattern and determining whether gas channeling occurs after gas breakthrough. After the anti-siphon device eliminates siphon interference, these monitoring data can be directly correlated with the actual displacement pressure difference, enabling researchers to quantitatively evaluate the changes in the relative permeability of the gas and liquid phases during the gas injection and brine discharge process.

[0032] Experimental procedure: I. Experimental System Preparation and Sample Loading Confirm that all valves (default closed) and instruments are correctly and securely connected. Pay particular attention to ensuring the anti-siphon buffer tank is fixed at the highest point of the experimental setup, its bottom outlet pipe is unobstructed and connected to the low-level brine collector 5, and the top vent valve 2 is normally open. Sludge sample filling and saturation: Open the top cover of the high-pressure chamber 7 and fill the prepared sludge particles (usually in ascending order of average particle size) into the high-pressure chamber 7 in layers until the filling height reaches 1 / 2 to 2 / 3 of the total height of the chamber. According to experimental requirements, connect a horizontal reducer 8 of appropriate specifications to the chamber outlet to simulate particle migration and clogging effects that may occur in the horizontal flow channel. After filling, sequentially open the first brine injection pipeline valve (HQ04), the first high-pressure chamber inlet valve (HQ03), the first brine discharge pipeline valves (QD07, QD08), and the first needle valve (ZF04). Start the high-precision plunger pump 15 to pump the prepared brine into the high-pressure chamber 7 at a low flow rate. Observe the outlet of the gas-liquid separator 14. When there is a continuous flow of brine without bubbles, it indicates that the high-pressure chamber 7, the vertical brine discharge pipe 4, and related pipelines are completely filled and saturated with brine. Close the plunger pump 15 and related valves.

[0033] II. Monitoring System Initialization Instrument parameter settings: Set the pressure setpoint of the first back pressure valve P5 to the target value (e.g., 10 MPa) to simulate the pressure of the overlying strata in the reservoir or the target gas injection pressure. Set the data acquisition frequency of the pressure sensors (P1, P3, P4), high-precision gas mass flow controller 13, clamp-type gas flow meter 20, and gas pressure reducing valve 12 to 1-2 times / second. Set the data acquisition frequency of the turbidity meter to 1 time / second to monitor changes in the turbidity of the discharged brine. Confirm that all monitoring instruments communicate normally with the data acquisition system.

[0034] III. Simulation Experiment Procedure for Gas Injection and Brine Discharge Gas injection start-up: Slowly open the main valve of the high-pressure nitrogen cylinder. Two injection modes can be selected for the experiment: Constant flow injection: Open valves QD01 and QD02, and set and maintain a constant gas injection flow rate through the gas mass flow controller QK1. Constant pressure injection: Open valves QD03 and QD04, and set and maintain a constant gas injection pressure through the gas pressure reducing valve 12. After being dehumidified by the gas-liquid separator 14, the gas enters the top of the high-pressure chamber through valve QD07.

[0035] Brine discharge process and anti-siphon function: As gas is injected, the pressure in the high-pressure chamber gradually increases. When the pressure inside the chamber exceeds the sum of the set value (10MPa) of the back pressure valve P5 and the resistance of the brine discharge pipeline, the back pressure valve P5 automatically opens, and brine discharge begins. Key steps: The displaced brine flows sequentially through the vertical brine discharge pipe and valve HQ03, and then enters the anti-siphon experimental device. The brine first enters the anti-siphon buffer tank, and then flows out from the bottom of the tank under its own gravity, passing through valve HQ05 and liquid flow meter 16, and finally enters the low-level brine collection tank.

[0036] Anti-siphon mechanism: During this process, the anti-siphon buffer tank, through its top-vented design, ensures that a closed liquid column cannot form at the top of the rising pipe connecting to the high-pressure chamber, fundamentally eliminating the siphon effect caused by the "inverted U-shaped pipe". Therefore, the chamber pressure (P1) monitored in the experiment truly reflects the gas pressure required to overcome the resistance of sediment and drive the brine flow, accurately simulating the high-pressure gas injection and brine discharge conditions in the deep salt chamber.

[0037] Process monitoring: During the experiment, data such as gas injection pressure / flow rate, chamber pressure, brine discharge pressure, exhaust gas flow rate, and brine turbidity were recorded in real time. Microscopic processes of gas breakthrough, channel formation, and particle transport within the chamber were observed and recorded using a high-speed camera.

[0038] IV. Experiment Conclusion and Data Collection Once the preset termination conditions for the experiment are met (such as gas injection volume, brine discharge volume, or experimental time), close the gas injection valve (QD01 / QD02 or QD03 / QD04) and the brine discharge valve (HQ05) sequentially. Slowly open the vent needle valve ZF04 to safely release the residual gas in the high-pressure chamber and pipeline. Open the drain valve (such as LQ01 or HQ01) to drain the residual brine in the high-pressure chamber.

[0039] Turn off all monitoring instruments. Export all pressure, flow, and turbidity data recorded by the data acquisition system for subsequent analysis. Stop and export the video data recorded by the high-speed camera. Open the top cover of the high-pressure chamber, clean or replace the sediment sample, and repeat the above steps to conduct comparative experiments under different conditions.

[0040] This implementation method, by integrating an anti-siphon device, ensures that the "one injection, one discharge" simulation experiment can be carried out under conditions that truly reflect the gas injection pressure of the project, providing a reliable and effective experimental means for studying the gas-liquid two-phase seepage law in the pores of sediment.

[0041] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0042] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An anti-siphon experimental device for simulating energy storage in salt cavern sediment pores, characterized in that, Includes an anti-siphon tube (1) and an exhaust valve (2); The anti-siphon pipe (1) is a tubular container with open ends and is set vertically. The anti-siphon pipe (1) has a connection port (3) on its side and is connected to the outlet of the brine discharge pipe (4). The bottom of the anti-siphon pipe (1) is connected to the brine collector (5) through a pipe. The exhaust valve (2) is located at the top of the anti-siphon pipe (1) and is used to introduce air to cut off the continuous liquid column in the brine discharge pipe (4) when the brine discharge stops or the air injection pressure is lower than the value required to maintain flow, thereby disrupting the siphon formation conditions.

2. The anti-siphon experimental device for simulating energy storage in salt cavern sediment pores according to claim 1, characterized in that, The exhaust valve (2) is an automatic exhaust valve.

3. The anti-siphon experimental device for simulating energy storage in salt cavern sediment pores according to claim 1, characterized in that, The exhaust valve (2) is a normally open micro-pressure valve.

4. The anti-siphon experimental device for simulating energy storage in salt cavern sediment pores according to claim 1, characterized in that, The inlet of the brine discharge pipe (4) is located between the connection port and the top port of the anti-siphon pipe (1).

5. The anti-siphon experimental device for simulating energy storage in salt cavern sediment pores according to claim 1, characterized in that, The connection port and top port of the anti-siphon pipe (1) are detachably connected to the brine discharge pipe (4) and the brine collector (5), respectively.

6. A salt cavern sediment pore energy storage simulation system, characterized in that, include: Box (6); A gas injection system is installed inside the housing (6) to provide a controllable gas source; A liquid phase injection system is installed inside the box (6) for the supply and metering of brine; A physical simulation system is set inside the box (6) to contain sediment particles and saturated brine in order to simulate the gas storage environment in the pores of salt cavern sediment. The brine discharge pipeline (4) is connected to the brine discharge outlet of the physical simulation system; Brine collector (5), used for collecting brine; According to any one of claims 1 to 5, the side connection port of the anti-siphon pipe (1) is connected to the outlet of the brine discharge pipe (4), and the bottom port of the anti-siphon pipe (1) is connected to the brine collector (5) through a pipe.

7. A salt cavern sediment void energy storage simulation system according to claim 6, characterized in that, The physical simulation system is a single injection and single discharge system, including a high-pressure chamber (7), which is equipped with a transparent observation window and a horizontal variable diameter pipe (8).

8. The salt cavern sediment void energy storage simulation system according to claim 6, characterized in that, The physical simulation system is a two-injection-one-outlet system, including a pair of low-pressure chambers (10) connected by a connecting pipe (9) and a pore pressure sensor array embedded in the sediment in the low-pressure chambers (10).

9. A salt cavern sediment void energy storage simulation system according to claim 6, characterized in that, The gas phase injection system includes a high-pressure nitrogen cylinder (11), a gas pressure reducing valve (12), a high-precision gas mass flow controller (13), and a gas-liquid separator (14) connected in sequence.

10. A salt cavern sediment pore energy storage simulation system according to claim 6, characterized in that, The liquid phase injection system includes a high-precision metering plunger pump (15), a liquid flow meter (16), a PLC frequency converter (17), a water storage tank (18), a turbidity meter (19), and a gas flow meter (20).

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