A reactor device and system for core research of underground salt cavern gas storage

Abstract

The present invention relates to a reactor device and system for core research of underground salt cavern gas storage, belonging to the field of underground salt cavern gas storage technology; used to solve the problem of lack of a special reactor device for core research of surrounding rock of underground salt cavern supercritical carbon dioxide gas storage in the prior art. It includes: a reactor body, a reactor cover and an air inlet pipe, the reactor body includes an inner layer and an outer layer, the inner layer forms a reaction chamber with an opening at one end, the outer layer wraps the inner layer, a temperature control chamber is formed between the inner layer and the outer layer, the inner layer is made of heat conductive material, a water inlet and a water outlet are arranged on the temperature control chamber, and a constant temperature liquid is introduced into the reaction chamber through the water inlet; the reactor cover is used to cover the opening of the reaction chamber, and the reactor cover is provided with an air inlet valve, an air outlet valve and a pressure gauge; the air inlet pipe is spirally arranged inside the temperature control chamber and wrapped around the outside of the reaction chamber. Since the reaction chamber and the temperature control chamber are arranged on the reactor body, the carbon dioxide reaches a predetermined temperature before entering the reaction chamber, and the test results are more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of underground salt cavern gas storage, and in particular relates to a reactor device and a system for core research of underground salt cavern gas storage. Background Art

[0002] Under the severe challenge of global climate change, reducing greenhouse gas emissions and achieving carbon reduction have become the common goals of the international community. As an efficient and safe way to store carbon dioxide, underground salt cavern gas storage plays a vital role in achieving the "dual carbon" goals. The core of this gas storage is its sealing and safety, which is directly related to the long-term and stable storage of carbon dioxide and the ability to prevent it from leaking into surface or groundwater bodies.

[0003] In underground salt cavern gas storage at a certain depth, carbon dioxide is usually stored in a supercritical state; supercritical carbon dioxide, as a special fluid state, has low density, low viscosity, higher compressibility and expansion, and almost zero surface tension properties. Therefore, the study of the sealing and safety of underground salt cavern gas storage must first have an in-depth understanding of the physical and chemical properties, pore structure and fracture system characteristics of salt rock. These characteristics determine the main channels for the migration and diffusion of supercritical carbon dioxide underground. At the same time, it is also necessary to evaluate the mechanical stability and permeability of salt rock to determine the maximum storage pressure it can withstand and the migration speed of supercritical carbon dioxide. This requires not only scientific research methods, but also advanced experimental equipment to simulate the underground environment in order to accurately evaluate the sealing and safety of the gas storage.

[0004] Therefore, before the test is carried out, the core needs to be processed by a special reactor device used for the study of the surrounding rock core of underground salt cavern gas storage. Due to the special existence form of supercritical carbon dioxide, there is currently no ready-made reactor available for direct selection, and a special reactor needs to be designed to meet the test requirements. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a reactor device and system for core research of underground salt cavern gas storage, which is used to solve the problem that the prior art lacks a special reactor device for core research of surrounding rocks of underground salt cavern supercritical carbon dioxide gas storage.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a reactor device for core research of underground salt cavern gas storage, comprising:

[0007] Kettle body,

[0008] The kettle body includes an inner layer and an outer layer, the inner layer forms a reaction chamber with an opening at one end, the outer layer wraps the inner layer, a temperature control chamber is formed between the inner layer and the outer layer, the inner layer is made of heat-conducting material, a water inlet and a water outlet are arranged on the temperature control chamber, and a constant temperature liquid is introduced into the temperature control chamber through the water inlet; the reaction chamber is connected to an air inlet valve.

[0009] cauldron cover,

[0010] The kettle cover is used to cover the opening of the reaction chamber, and the kettle cover is provided with an air outlet valve, a pressure gauge and a pressure relief valve;

[0011] Intake pipe,

[0012] The air inlet pipe is spirally arranged inside the temperature control chamber and wound around the outside of the reaction chamber. The air inlet pipe includes an air inlet and an air outlet. Carbon dioxide is input into the air inlet pipe through the air inlet. The air outlet is connected to the air inlet valve, and carbon dioxide at a constant temperature is introduced into the reaction chamber through the air outlet.

[0013] Optionally, the reactor device for core research of underground salt cavern gas storage further comprises a vertical pressurizing mechanism, wherein the vertical pressurizing mechanism comprises a telescopic rod, an upper pressurizing plate, a lower pressurizing plate and an elastic column.

[0014] The telescopic rod is fixedly installed at the bottom of the reaction chamber, the lower pressure plate is fixedly installed at the telescopic end of the telescopic rod, the elastic column is fixedly connected to the kettle cover, the upper pressure plate is fixedly connected to the elastic column, the upper pressure plate and the lower pressure plate are arranged opposite to each other, and the space between the upper pressure plate and the lower pressure plate is used to place the core sample.

[0015] Optionally, a plurality of ventilation holes are provided on the upper pressure plate and the lower pressure plate.

[0016] Optionally, the reactor device used for core research of underground salt cavern gas storage also includes a lateral pressurization mechanism, which includes a lateral pressurization block and a drive assembly, the drive assembly is fixedly mounted on the inner layer, the pressurization block is fixedly mounted on the movable end of the drive assembly, four groups of the pressurization blocks are arranged in a ring, and the drive assembly drives the pressurization blocks to move.

[0017] Optionally, the driving assembly includes a cylinder body and a push rod, four groups of the cylinder bodies are installed in a ring-shaped arrangement on the inner layer, the push rod is slidably arranged inside the cylinder body through a piston, the end of the push rod is fixedly connected to the pressure block, and an active cavity is formed between the cylinder body and the piston, and the active cavities in the four groups of cylinder bodies are connected through air pressure pipes, and constant pressure gas is connected through the air pressure pipes.

[0018] Optionally, a plurality of ventilation holes are provided on the pressure block.

[0019] Optionally, displacement sensors are installed on the upper pressure plate, the lower pressure plate and the pressure block, and the displacements of the upper pressure plate, the lower pressure plate and the pressure block are detected by the displacement sensors.

[0020] The present invention provides a system for studying the core of an underground salt cavern gas storage, further comprising:

[0021] A temperature control system, the temperature control system is used to control the temperature in the reactor;

[0022] An aeration system, the aeration system being used to introduce carbon dioxide into the reactor;

[0023] A detection system is used to detect the core sample taken out from the reactor. The detection system includes industrial CT scanning equipment, nuclear magnetic resonance equipment, scanning electron microscope instrument and XRD test. The core sample taken out from the reactor is detected by industrial CT scanning equipment, nuclear magnetic resonance equipment, scanning electron microscope instrument and XRD test.

[0024] Optionally, the temperature control system includes a temperature sensor, a water tank, a heater, and a circulating water pump. The water tank is connected to the water inlet and the water outlet through a circulating water pipe to form a circulating water circuit. The water pump is arranged on the circulating water pipe. The heater is fixedly installed inside the water tank. The liquid inside the water tank is heated by the heater. The temperature sensor is arranged inside the water tank.

[0025] Optionally, the inflation system includes a carbon dioxide gas tank and a pressure pump, the carbon dioxide gas tank is connected to the pressure pump, and the pressure pump is connected to the air inlet.

[0026] As described above, the reactor device and system for core research of underground salt cavern gas storage of the present invention have at least the following beneficial effects:

[0027] 1. Since the kettle is provided with a reaction chamber and a temperature control chamber, and the air inlet pipe is spirally wound inside the temperature control chamber, when carbon dioxide gas is injected into the kettle, the carbon dioxide gas first passes through the air inlet pipe. However, a circulating constant temperature liquid is provided in the temperature control chamber, which can preheat the carbon dioxide in advance so that the carbon dioxide reaches a predetermined temperature before entering the reaction chamber. At the same time, the circulating constant temperature liquid can synchronously heat the gas in the reaction chamber inside the kettle. The temperature of carbon dioxide is stable after entering the reactor, and the test results are more accurate.

[0028] 2. Since a vertical pressurizing mechanism is provided, the core sample is longitudinally pressurized during the carbon dioxide infiltration process, simulating the carbon dioxide infiltration process under the condition of core pressure, which is closer to the environment in which the core exists. This is conducive to improving the test results. At the same time, since a telescopic rod is provided in the vertical pressurizing mechanism, when installing the core sample, the telescopic rod can be extended first to lift the upper pressure plate to the opening of the kettle body, which is convenient for the installation of the core sample.

[0029] 3. Due to the lateral pressure mechanism, the four side walls of the core sample can be pressurized synchronously, and the six sides of the core are all under pressure, which can well simulate the actual situation of the core in the rock formation, and is more conducive to improving the test effect. At the same time, since constant pressure gas is introduced into the active cavity, it can ensure that the core sample is under constant pressure. When the core sample expands or creeps, the pressure will not change. The displacement sensor can also detect the deformation of the core sample in real time.

[0030] 4. By connecting the four groups of active cavities in the cylinder, when constant pressure high-pressure gas is introduced into them, the piston rods of the four groups are compressed synchronously so that the core sample is evenly pressurized on all sides. At the same time, since the pressure block, the upper platen and the lower platen are provided with a number of vents, carbon dioxide can enter the core sample through the vents. Under pressure, the core sample can also be infiltrated by carbon dioxide on all sides. And it enters synchronously from the surroundings, which is similar to the situation where the core sample is infiltrated by carbon dioxide in the rock formation, and the simulation result is more accurate.

[0031] 5. The vertical pressurizing mechanism and the lateral pressurizing mechanism can be used to test the mechanical properties of the core sample under supercritical carbon dioxide, including testing the compression deformation and testing the compression failure curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional structural schematic diagram of the internal structure of a reactor device for studying the surrounding rock core of an underground salt cavern gas storage reservoir according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the three-dimensional structure of the core sample installation position of the reactor device for the surrounding rock core research of the underground salt cavern gas storage in an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the three-dimensional structure of the intake pipe in a winding state according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the appearance structure of a reactor device and system for studying the surrounding rock core of an underground salt cavern gas storage in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not need to be adopted to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, software or methods are not specifically described.

[0037] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. In addition, it should be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale.

[0038] See also Figure 1-Figure 4The present invention provides an embodiment of a reactor device and system for core research of underground salt cavern gas storage, comprising: a reactor body 101, a reactor cover 102 and an air inlet pipe 106, wherein the reactor body 101 comprises an inner layer 1011 and an outer layer 1012, wherein the inner layer 1011 forms a reaction chamber 120 with one end open, wherein the outer layer 1012 wraps the inner layer 1011, and a temperature control chamber 110 is formed between the inner layer 1011 and the outer layer 1012, wherein the inner layer 1011 is made of a heat-conducting material, and a metal material such as stainless steel can be used. The temperature control chamber 110 is provided with a water inlet 1013 and a water outlet 1014, and a constant temperature liquid is introduced into the temperature control chamber 110 through the water inlet 1013; the liquid can be water or oil. The temperature control chamber 110 is selected according to the actual situation. The reaction chamber 120 is connected with an air inlet valve 104. The kettle cover 102 is used to cover the opening of the reaction chamber 120. The kettle cover 102 is provided with an air outlet valve 105. The kettle cover 102 is provided with a pressure gauge 103 and a pressure relief valve. The pressure gauge 103 detects the gas pressure in the reaction kettle, and an explosion-proof disk may also be provided. The air outlet valve 105 may be a minimum pressure valve, which is conducive to maintaining the gas pressure in the reaction chamber 120. The air inlet pipe 106 is spirally arranged inside the temperature control chamber 110 and wound around the outside of the reaction chamber 120. The air inlet pipe 106 includes an air inlet 1061 and an air outlet 1062. The air outlet 1062 is connected with the air inlet valve 104, and carbon dioxide is input into the reaction chamber 120 through the air inlet 1061. The air inlet valve 104 is a minimum pressure valve. The minimum pressure valve can be set to output gas pressure of 7.39 MPa to ensure that the gas pressure output to the reaction chamber 120 is not lower than the set value (7.39 MPa). At the same time, the pressure relief pressure of the pressure relief valve is also set to 7.39 MPa. When the gas pressure is higher than 7.39 MPa, the pressure will be released, thereby ensuring that the pressure in the entire reaction chamber 120 remains constant at 7.39 MPa.

[0039] Carbon dioxide needs to be in a supercritical state at a specific temperature and pressure. To study the changes in the characteristics of the core sample 10 under supercritical carbon dioxide infiltration, it is necessary to keep carbon dioxide in this state for a long time. For example, at 31.1°C and 7.39MPa, carbon dioxide will be in a special fluid state between gas and liquid, that is, a supercritical state. Therefore, in this application, since the kettle 101 is provided with a reaction chamber 120 and a temperature control chamber 110, the air inlet pipe 106 is spirally wound inside the temperature control chamber 110. When high-pressure (about 7.39MPa) carbon dioxide gas is injected into the kettle 101, the carbon dioxide gas first passes through the air inlet pipe 106. However, a circulating constant temperature liquid is provided in the temperature control chamber 110, and the temperature can be set at 31.1°C. The carbon dioxide is preheated in advance so that the carbon dioxide reaches a predetermined temperature before entering the reaction chamber 120, and enters the reactor after becoming supercritical in advance. At the same time, the circulating constant temperature liquid can synchronously heat the gas in the reaction chamber 120 inside the kettle 101. After the carbon dioxide enters the reactor, the temperature can be kept constant, so that the carbon dioxide is in a supercritical state for a long time, and the test results are more accurate.

[0040] In this embodiment, please refer to Figure 1-Figure 4 The reactor device for the core research of underground salt cavern gas storage also includes a vertical pressurizing mechanism, which includes a telescopic rod 401, an upper press plate 403, a lower press plate 402 and an elastic column 404.

[0041] The telescopic rod 401 is fixedly installed at the bottom of the reaction chamber 120, and the lower pressure plate 402 is fixedly installed at the telescopic end of the telescopic rod 401. The telescopic rod 401 can be a cylinder, an electric push rod or a jack. The elastic column 404 is fixedly connected to the kettle cover 102, and the upper pressure plate 403 is fixedly connected to the elastic column 404. The upper pressure plate 403 and the lower pressure plate 402 are arranged opposite to each other, and the upper pressure plate 403 and the lower pressure plate 402 are used to place the core sample. Since a vertical pressurizing mechanism is provided, during the process of carbon dioxide infiltration, the core sample is longitudinally pressurized at the same time to simulate the carbon dioxide infiltration process under the condition of core pressure, which is closer to the environment where the core exists. It is conducive to improving the test results. At the same time, since the telescopic rod 401 is provided in the vertical pressurizing mechanism, when installing the core sample, the telescopic rod 401 can be extended first, and the lower pressure plate 402 can be lifted to the opening of the kettle body 101, which is convenient for the installation of the core sample 10

[0042] In this embodiment, please refer to Figure 1-Figure 4 A plurality of ventilation holes are provided on the upper pressure plate 403 and the lower pressure plate 402 .

[0043] In this embodiment, please refer to Figure 1-Figure 4The reactor device used for the core research of underground salt cavern gas storage also includes a lateral pressure mechanism, which includes a lateral pressure block 503 and a driving assembly. The driving assembly is fixedly mounted on the inner layer 1011, and the pressure block 503 is fixedly mounted on the active end of the driving assembly. Four groups of pressure blocks 503 are arranged in a ring, and the driving assembly drives the pressure blocks 503 to move. Due to the provision of a lateral pressure mechanism, the four side walls of the core sample 10 can be pressurized synchronously, and the six faces of the core are all subjected to pressure, which can well simulate the actual situation of the core existing in the rock formation, and is more conducive to improving the test accuracy. At the same time, since constant pressure gas is introduced into the active chamber, it can ensure that the core sample 10 is subjected to constant pressure. When the core sample 10 expands, creeps, etc., the pressure will not change.

[0044] In this embodiment, please refer to Figure 1-Figure 4 The driving assembly includes a cylinder body 501 and a push rod 502. Four groups of the cylinder bodies 501 are arranged in a ring on the inner layer 1011. The push rod 502 is set inside the cylinder body 501 through a piston sliding. The end of the push rod 502 is fixedly connected to the pressure block 503. An active cavity is formed between the cylinder body 501 and the piston. The active cavities in the four groups of cylinder bodies 501 are connected through a pneumatic pipeline, and a constant-pressure gas is connected through the pneumatic pipeline. The constant-pressure gas can be provided by an air compressor, or by a constant-pressure gas tank or other gas transmission equipment.

[0045] By connecting the movable chambers in the four groups of cylinder bodies 501, when high-pressure constant-pressure gas is introduced therein, the piston rods of the four groups are compressed synchronously so that the core sample 10 is evenly pressurized on all sides. At the same time, since a number of vents are provided on the pressure block 503, the upper pressure plate 403 and the lower pressure plate 402, carbon dioxide can enter the core sample 10 through the vents. Under pressure, the core sample 10 can also be infiltrated by carbon dioxide on all sides. And it enters synchronously from the surroundings, which is similar to the situation where the core sample 10 is infiltrated by carbon dioxide in the rock formation. The simulation results are more accurate, and when the core sample 10 undergoes creep, expansion, etc., it will not cause changes in the pressure of the surrounding pressure blocks 503, thereby ensuring that the pressure around the core sample 10 will not change due to the squeezing of the core sample 10 during creep and expansion.

[0046] In this embodiment, please refer to Figure 1-Figure 4 The pressure block 503 is provided with a plurality of ventilation holes, which are interconnected.

[0047] In this embodiment, please refer to Figure 1-Figure 4The upper platen 403, the lower platen 402 and the pressure block 503 are all equipped with displacement sensors, and the displacements of the upper platen 403, the lower platen 402 and the pressure block 503 are detected by the displacement sensors. Through the vertical pressure mechanism and the lateral pressure mechanism, the pressure mechanical properties of the core sample 10 under supercritical carbon dioxide can be tested, including compression deformation and compression failure curve. At the same time, the displacement sensor on the pressure block 503 can also detect the deformation of the core sample 10 in real time due to expansion and creep.

[0048] The present invention provides a system for studying the core of an underground salt cavern gas storage reservoir, comprising:

[0049] A temperature control system, the temperature control system is used to control the temperature in the reactor;

[0050] An aeration system, the aeration system being used to introduce carbon dioxide into the reactor;

[0051] The detection system is used to detect the core sample 10 taken out from the reactor. The detection system includes industrial CT scanning equipment, nuclear magnetic resonance equipment, scanning electron microscope instrument and XRD test. The core sample 10 taken out from the reactor is detected by industrial CT scanning equipment, nuclear magnetic resonance equipment, scanning electron microscope instrument and XRD test, so as to conduct comprehensive testing and analysis on the core sample 10.

[0052] In this embodiment, please refer to Figure 1-Figure 4 The temperature control system includes a temperature sensor, a water tank, a heater and a circulating water pump. The water tank is connected to the water inlet 1013 and the water outlet 1014 through a circulating water pipe to form a circulating water circuit. The water pump is arranged on the circulating water pipe. The heater is fixedly installed inside the water tank. The liquid inside the water tank is heated by the heater. The temperature control box and the water tank are both provided with the temperature sensor.

[0053] By setting up circulating constant temperature water, the temperature in the temperature control box is kept constant to avoid local temperature differences caused by local uneven heat dissipation, which may affect the test results.

[0054] In this embodiment, please refer to Figure 1-Figure 4, the inflation system includes a carbon dioxide gas tank 2 and a pressure pump 3, the carbon dioxide gas tank 2 is connected to the pressure pump 3, and the pressure pump 3 is connected to the air inlet 1061. The pressure pump 3 can be a plunger pump. The carbon dioxide gas tank 2 provides carbon dioxide gas with a stable concentration and pressure, and the pressure of the carbon dioxide gas is adjusted by the pressure pump 3. A pressure-stabilizing gas tank can also be set between the pressure pump 3 and the reactor. The pressure-stabilizing gas tank is a tank body for storing high-pressure gas. The pressure-stabilizing gas tank is injected with high-pressure gas through the pressure pump 3. During the test, the pressure pump 3 is turned off, and only the pressure-stabilizing gas tank and the air inlet valve 104 are connected. The pressure-stabilizing gas tank plays a role in stabilizing the air pressure in the reaction chamber 120 during the test. When the pressure in the reaction chamber 120 decreases, the pressure-stabilizing gas tank automatically inputs high-pressure gas in time to stabilize the pressure.

[0055] In this embodiment, a water mist nozzle is also provided on the inner layer 1011 in the reaction chamber 120, and the water mist nozzle can spray water mist into the reaction chamber 120, so as to adjust the humidity in the reaction chamber 120, so as to study the changes of the core under supercritical carbon dioxide gas infiltration under different humidity conditions. After part of the carbon dioxide is dissolved in the water mist, the acidic gas mist is formed to corrode the core, which will accelerate the change of the core. Before the water mist is sprayed, the water in the tube is preheated to make its temperature consistent with the temperature in the reaction chamber 120. A humidity sensor is set in the reaction chamber to monitor the humidity change therein.

[0056] In summary, the present invention spirally wraps the air inlet pipe 106 around the temperature control chamber 110. When carbon dioxide gas is injected into the kettle 101, the carbon dioxide gas first passes through the air inlet pipe 106. However, a circulating constant temperature liquid is provided in the temperature control chamber 110, and the carbon dioxide can be preheated in advance, so that the carbon dioxide reaches a predetermined temperature before entering the reaction chamber 120. At the same time, the circulating constant temperature liquid can synchronously heat the gas in the reaction chamber 120 inside the kettle 101. The temperature of carbon dioxide is stable after entering the reactor, and the test results are more accurate. At the same time, the pressure mechanical properties of the core sample 10 under supercritical carbon dioxide can be tested through the vertical pressurization mechanism and the lateral pressurization mechanism. Therefore, the present invention effectively overcomes the various shortcomings in the prior art.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A reactor device for core research of underground salt cavern gas storage, characterized in that: include: Kettle body, The kettle body comprises an inner layer and an outer layer, the inner layer forms a reaction chamber with one end open, the outer layer wraps the inner layer, a temperature control chamber is formed between the inner layer and the outer layer, the inner layer is made of a heat conductive material, a water inlet and a water outlet are arranged on the temperature control chamber, and a constant temperature liquid is introduced into the temperature control chamber through the water inlet; cauldron cover, The kettle cover is used to cover the opening of the reaction chamber, an air outlet valve is provided on the kettle cover, and a pressure gauge is provided on the kettle cover; Intake pipe, The air inlet pipe is spirally arranged inside the temperature control chamber and wound around the outside of the reaction chamber. The air inlet pipe includes an air inlet and an air outlet. The air outlet is connected to the reaction chamber through a pipeline. An air inlet valve is also arranged on one end of the pipeline close to the reaction chamber. Carbon dioxide is input into the reaction chamber through the air inlet. It also includes a vertical pressurizing mechanism, which includes a telescopic rod, an upper pressurizing plate, a lower pressurizing plate and an elastic column. The telescopic rod is fixedly installed at the bottom of the reaction chamber, the lower pressure plate is fixedly installed at the telescopic end of the telescopic rod, the elastic column is fixedly connected to the kettle cover, the upper pressure plate is fixedly connected to the elastic column, the upper pressure plate and the lower pressure plate are arranged opposite to each other, and the core sample is placed between the upper pressure plate and the lower pressure plate; a plurality of vent holes are opened on the upper pressure plate and the lower pressure plate; It also includes a lateral pressure mechanism, which includes lateral pressure blocks and a driving assembly, wherein four groups of pressure blocks are arranged in a circular array, and the driving assembly drives the pressure blocks to move; The driving assembly includes a cylinder body and a push rod. Four groups of cylinder bodies are installed in a ring-shaped arrangement on the inner layer. The push rod is slidably arranged inside the cylinder body through a piston. The end of the push rod is fixedly connected to the pressure block. An active cavity is formed between the cylinder body and the piston. The active cavities in the four groups of cylinder bodies are connected through air pressure pipes, and constant pressure gas is connected through the air pressure pipes. A number of ventilation holes are opened on the pressure block.

2. The reactor device for core research of underground salt cavern gas storage according to claim 1 is characterized in that: Displacement sensors are installed on the upper pressure plate, the lower pressure plate and the pressure block, and the displacements of the upper pressure plate, the lower pressure plate and the pressure block are detected by the displacement sensors.

3. A system for core research of underground salt cavern gas storage, characterized in that: A reactor device for studying cores of underground salt cavern gas storages comprising any one of claims 1-2, and also comprising a detection system, wherein the detection system is used to detect core samples taken out of the reactor.

4. The system for core research of underground salt cavern gas storage according to claim 3, characterized in that: It also includes a temperature sensor, a water tank, a heater and a circulating water pump. The water tank is connected with the water inlet and the water outlet through a circulating water pipe to form a circulating water circuit. The circulating water pump is arranged on the circulating water pipe. The heater is fixedly installed inside the water tank. The liquid inside the water tank is heated by the heater. The temperature sensor is arranged inside the water tank.

5. The system for core research of underground salt cavern gas storage according to claim 3, characterized in that: It also includes a carbon dioxide gas tank and a plunger pump, the carbon dioxide gas tank is connected to the plunger pump, and the plunger pump is connected to the air inlet.

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