An experimental device for THMC coupling relationship in saline aquifer CO2 sequestration

Abstract

The invention discloses a THMC coupling relationship test device for CO2 storage in saline water layer, comprising a weighing sensor, a frame and a test workpiece, wherein the weighing sensor is used for placing and weighing a reservoir model; the frame is sleeved outside the reservoir model, the frame comprises a loading steel plate and a plate structure respectively fitted to the reservoir model, a thrust assembly is connected to the side of the loading steel plate away from the reservoir model, so that the loading steel plate is in a force-holding state; the test workpiece comprises an osmotic pressure micro-element, a pH value probe and an infrared thermal imager, the osmotic pressure micro-element and the pH value probe are both located inside the reservoir model, the infrared thermal imager is located outside the frame and is arranged corresponding to the plate structure, the evolution process of osmotic pressure, chemical field, reservoir strength and temperature in the reservoir model after CO2 is introduced is measured by the osmotic pressure micro-element, the pH value probe, the weighing sensor and the infrared thermal imager, and the physical similarity simulation experiment principle can avoid the problem of high cost of reservoir thermal-fluid-chemical coupling relationship test.

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide geological storage, and in particular to a THMC coupling relationship test device for CO2 storage in saline water layers. Background Art

[0002] The thermal-fluid-mechanical-chemical coupling effect is a common understanding in the theory of CO2 geological storage. In the CO2 injection and storage project in saline aquifers, the formation temperature, pressure, well fluid pH and rock strength are usually analyzed and studied during the CO2 injection process. Based on this, a thermal-fluid-mechanical-chemical coupling relationship model that can accurately describe the CO2 injection and storage in saline aquifers is obtained, which has important engineering guidance value for scientifically guiding the CO2 injection operation in saline aquifers and the evaluation of CO2 storage potential.

[0003] However, the existing reservoir thermal-fluid-mechanical-chemical coupling relationship testing technology usually requires the construction of observation wells, which are mainly used to test indicators such as pressure, temperature, pore water pH around the injection well, and then analyze the thermal-fluid-mechanical-chemical coupling relationship in the CO2 injection well storage in the saline layer. However, such technology is extremely expensive, with the construction cost of the observation well alone reaching tens of millions of yuan. In addition, the GCTS test system can also be used for testing, but the market value of related instruments and equipment is tens of millions of yuan, and the testing cost is relatively high.

[0004] Therefore, how to avoid the problem of high cost of reservoir thermal-fluid-mechanical-chemical coupling relationship testing is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The present invention aims to provide a THMC coupling relationship test device for saline CO2 storage, which can avoid the problem of high cost of reservoir thermal-fluid-mechanical-chemical coupling relationship testing.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A THMC coupling relationship test device for saline CO2 storage is used to observe the reservoir model after liquid CO2 is introduced. The THMC coupling relationship test device includes:

[0008] A load cell, used to place and weigh the reservoir model;

[0009] The frame is sleeved outside the reservoir model, and the frame includes a loading steel plate and a plate structure respectively attached to the reservoir model, and a thrust assembly is connected to the side of the loading steel plate away from the reservoir model to keep the loading steel plate in a force-holding state;

[0010] The test workpiece includes an osmotic pressure micro-element, a pH probe, and an infrared thermal imager. The osmotic pressure micro-element and the pH probe are both located inside the reservoir model for obtaining the osmotic pressure and pH value of the reservoir model in real time. The infrared thermal imager is located outside the frame and is arranged corresponding to the plate structure to obtain the surface temperature of the reservoir model in real time.

[0011] Preferably, the test equipment further includes a central control system, a data acquisition box, and a data acquisition station. The osmotic pressure micro-element and the pH probe are both connected to the data acquisition box, the weighing sensor is connected to the data acquisition station, and the central control system is connected to the data acquisition box, the data acquisition station, and the infrared thermal imager to obtain the information to be measured at each position of the reservoir model in real time.

[0012] Preferably, there are multiple osmotic pressure micro-elements, pH probes, and weighing sensors. The multiple osmotic pressure micro-elements, pH probes, and weighing sensors are all evenly arranged in the horizontal direction, and the adjacent osmotic pressure micro-elements and pH probes are spaced vertically.

[0013] Preferably, the osmotic pressure micro-element and the pH probe are connected to the data acquisition box through cables.

[0014] Preferably, a moving plate is provided between the frame and the loading steel plate. The thrust assembly includes a hydraulic jack arranged on the moving plate, and the hydraulic jack is connected to a hydraulic pump through an oil pressure pipe so that the hydraulic jack can expand and contract along its own axis for pressing the loading steel plate.

[0015] Preferably, the thrust assembly further includes a push rod assembly. The push rod assembly includes a spring, a guide rod, an inner sleeve, and an outer sleeve. The outer sleeve is sleeved outside the inner sleeve and fixed to the moving plate. The guide rod passes through the frame, the inner sleeve, and the loading steel plate respectively. The spring is sleeved outside the thrust rod and is located between the frame and the inner sleeve to enable the moving plate to move along the axial direction of the guide rod.

[0016] Preferably, both the outer sleeve and the inner sleeve are provided with bent portions for preventing the outer sleeve and the inner sleeve from detaching from the moving plate.

[0017] Preferably, the guide rod is detachably connected to the loading steel plate through a fixing member, and the fixing member is specifically a nut.

[0018] Preferably, the bottom of the frame is provided with pulleys which can drive the frame to move, and the bottom of the infrared thermal imager is provided with a bracket which can expand and contract to adjust the height of the infrared thermal imager.

[0019] Preferably, the plate structure is a transparent acrylic plate.

[0020] Compared with the above-mentioned background technology, the THMC coupling relationship test equipment for saline CO2 storage provided by the present invention is used to observe the reservoir model after liquid CO2 is introduced. The THMC coupling relationship test equipment includes a weighing sensor, a frame and a test workpiece. The weighing sensor is used to place and weigh the reservoir model; the frame is sleeved on the outside of the reservoir model, and the frame includes a loading steel plate and a plate structure respectively attached to the reservoir model. The side of the loading steel plate away from the reservoir model is connected with a thrust assembly to keep the loading steel plate in a force-holding state; the test workpiece includes an osmotic pressure microelement, a pH probe and an infrared thermal imager. The osmotic pressure microelement and the pH probe are both located inside the reservoir model and are used to obtain the osmotic pressure and pH of the reservoir model in real time. The infrared thermal imager is located outside the frame and is arranged corresponding to the plate structure to obtain the surface temperature of the reservoir model in real time.

[0021] Specifically, in the process of making a reservoir model on the weighing sensor, the osmotic pressure micro-element and the pH probe are pre-buried. After the reservoir model is made, the frame is put on the outside of the reservoir model so that the loading steel plate and the plate structure are respectively fitted to the reservoir model. The thrust assembly makes the loading steel plate in a holding state. At the same time, an infrared thermal imager for obtaining the surface temperature of the reservoir model in real time is provided on the outside of the frame. The osmotic pressure micro-element, pH probe, weighing sensor and infrared thermal imager are used to measure the evolution process of osmotic pressure, chemical field, reservoir strength and temperature in the reservoir model after the introduction of liquid CO2. With this arrangement, a thermal-fluid-mechanical-chemical coupling relationship test equipment for CO2 storage in saline water layers is proposed through the principle of physical similarity simulation experiment, which can avoid the problem of high cost of reservoir thermal-fluid-mechanical-chemical coupling relationship testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a test device provided by an embodiment of the present invention;

[0024] Figure 2 A structural side view of a frame provided by an embodiment of the present invention;

[0025] Figure 3 A structural side view of an infrared thermal imager provided by an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of a thrust assembly provided in an embodiment of the present invention.

[0027] Wherein:

[0028] 1 - Reservoir model;

[0029] 100 - Load cell;

[0030] 200 - Frame, 210 - Loading steel plate, 220 - Plate structure, 230 - Pulley;

[0031] 310 - Moving plate, 320 - Hydraulic jack, 321 - Oil pressure pipe, 322 - Hydraulic pump, 331 - Spring, 332 - Guide rod, 333 - Inner sleeve, 334 - Outer sleeve, 335 - Bent part, 336 - Fixing part;

[0032] 410 - Osmotic pressure micro - element, 420 - pH value probe, 430 - Infrared thermal imager, 431 - Bracket, 440 - Cable;

[0033] 500 - Central control system;

[0034] 600 - Data acquisition box;

[0035] 700 - Data acquisition station. Detailed implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0037] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right" etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0039] The purpose of the present invention is to provide a THMC coupling relationship test device for CO2 sequestration in saline aquifers, which can avoid the problem of high cost in testing the reservoir thermal - fluid - mechanical - chemical coupling relationship.

[0040] To achieve the above - mentioned purpose, the present invention provides the following technical solutions:

[0041] Please refer to Figure 1 , the present embodiment provides a THMC coupling relationship test device for CO2 sequestration in saline aquifers, which is used to observe the reservoir model 1 after injecting liquid CO2. The THMC coupling relationship test device includes a weighing sensor 100, a frame 200 and a test workpiece.

[0042] The weighing sensor 100 is used to place and weigh the reservoir model 1.

[0043] It can be understood that the weighing sensor 100 is located at the bottom of the reservoir model 1 and can support and weigh the reservoir model 1, which is used to weigh the weights at each point position at the bottom during the CO2 injection process in the entire reservoir model 1, so as to evaluate the distribution change of the solid stress field in CO2 sequestration in saline aquifers.

[0044] The frame 200 is sleeved outside the reservoir model 1. The frame 200 includes a loading steel plate 210 and a plate structure 220 that are respectively attached to the reservoir model 1. A thrust assembly is connected to the side of the loading steel plate 210 facing away from the reservoir model 1 to keep the loading steel plate 210 in a bearing state.

[0045] In this embodiment, the frame 200 is sleeved outside the reservoir model 1. The loading steel plate 210 is preferably located at the top, left and right sides of the reservoir model 1. The loading steel plate 210 can move relative to the reservoir model 1 to perform up-down and left-right constraints on the reservoir model 1. The plate structure 220 is located in front of and behind the reservoir model 1 and is closely attached to the reservoir model 1 to perform front-back constraints on the reservoir model 1.

[0046] The test workpiece includes an osmotic pressure micro-element 410, a pH probe 420 and an infrared thermal imager 430. Both the osmotic pressure micro-element 410 and the pH probe 420 are located inside the reservoir model 1 and are used to obtain the osmotic pressure and pH value of the reservoir model 1 in real time. The infrared thermal imager 430 is located outside the frame 200 and is arranged corresponding to the plate structure 220 to obtain the surface temperature of the reservoir model 1 in real time.

[0047] Specifically, during the process of fabricating the reservoir model 1 on the load cell 100, the osmotic pressure micro-element 410 and the pH probe 420 are pre-embedded. After the reservoir model 1 is fabricated, the frame 200 is sleeved outside the reservoir model 1, such that the loading steel plate 210 and the plate structure 220 are respectively attached to the reservoir model 1. The thrust assembly enables the loading steel plate 210 to be in a bearing state. Meanwhile, an infrared thermal imager 430 for real-time acquisition of the surface temperature of the reservoir model 1 is provided outside the frame 200. The evolution processes of the osmotic pressure, chemical field, reservoir strength, and temperature in the reservoir model 1 after injecting liquid CO2 are measured by the osmotic pressure micro-element 410, the pH probe 420, the load cell 100, and the infrared thermal imager 430. With such a setting, a test device for the thermal-fluid-mechanical-chemical coupling relationship for CO2 sequestration in saline aquifers is proposed through the principle of physical similarity simulation experiments, which can avoid the problem of high test costs for the reservoir thermal-fluid-mechanical-chemical coupling relationship.

[0048] Preferably, the test device further includes a central control system 500, a data acquisition box 600, and a data acquisition station 700. The osmotic pressure micro-element 410 and the pH probe 420 are both connected to the data acquisition box 600, the load cell 100 is connected to the data acquisition station 700, and the central control system 500 is connected to the data acquisition box 600, the data acquisition station 700, and the infrared thermal imager 430 to acquire the information to be measured at each position of the reservoir model 1 in real time.

[0049] It can be understood that the osmotic pressure micro-element 410 and the pH probe 420 are used to acquire the osmotic pressure and solution pH value at each point position in the reservoir model 1 during the CO2 injection process, and transmit the corresponding data to the connected data acquisition box 600 in real time. The load cell 100 can transmit the corresponding data to the connected data acquisition station 700 in real time. The central control system 500 collects, analyzes, and calculates the real-time data of the data acquisition box 600, the data acquisition station 700, and the infrared thermal imager 430 to obtain the thermal-fluid-mechanical-chemical coupling relationship during the entire CO2 injection process.

[0050] It should be noted that the data acquisition box 600, the data acquisition station 700, and the infrared thermal imager 430 can be transmitted either through connection lines or through signals, as long as the above purposes can be achieved.

[0051] Preferably, there are multiple osmotic pressure micro-elements 410, pH probes 420, and load cells 100. The multiple osmotic pressure micro-elements 410, pH probes 420, and load cells 100 are all uniformly arranged in the horizontal direction, and the adjacent osmotic pressure micro-elements 410 and pH probes 420 are spaced vertically.

[0052] In this embodiment, there are multiple osmotic pressure microelements 410, pH probes 420 and weighing sensors 100, wherein the weighing sensors 100 are located at the bottom of the reservoir model 1 and are evenly arranged in the horizontal direction to meet the weighing of the weight of each point at the bottom of the entire reservoir model 1 during the CO2 injection process. The pH probes 420 and the weighing sensors 100 are staggered up and down, and the pH probes 420 and the weighing sensors 100 are both multi-layered, and the pH probes 420 or weighing sensors 100 on the same layer are preferably evenly arranged in the horizontal direction.

[0053] It should be noted that the specific positions and quantities of the osmotic pressure micro-element 410, the pH probe 420 and the weighing sensor 100 can also be adjusted according to actual conditions, and are not specifically limited here, as long as the above-mentioned purpose can be achieved.

[0054] Preferably, the osmotic pressure micro-element 410 and the pH probe 420 are connected to the data acquisition box 600 via a cable 440 .

[0055] Among them, the osmotic pressure micro-element 410 and the pH probe 420 are preferably connected to the data acquisition box 600 via a cable 440. The cable 440 is used for data transmission. The osmotic pressure micro-element 410 or pH probe 420 at the same height share the same cable 440 to achieve the above purpose.

[0056] Preferably, a movable plate 310 is provided between the frame 200 and the loading steel plate 210, and the thrust assembly includes a hydraulic jack 320 arranged on the movable plate 310, and the hydraulic jack 320 is connected to the hydraulic pump 322 through an oil pressure pipe 321, so that the hydraulic jack 320 can be extended and retracted along its own axis to compress the loading steel plate 210.

[0057] In this embodiment, the loading steel plate 210 is connected to the frame 200 through a thrust assembly. Preferably, a movable plate 310 for fixing the thrust assembly is provided between the frame 200 and the loading steel plate 210. The thrust assembly includes a hydraulic jack 320 arranged on the movable plate 310. The hydraulic pump 322 enables the hydraulic jack 320 to extend and retract along its own axis through an oil pressure pipe 321 to move closer to or away from the loading steel plate 210, so that the loading steel plate 210 is always in a force-holding state.

[0058] Among them, each loading steel plate 210 is correspondingly provided with three hydraulic jacks 320, and the three hydraulic jacks 320 are symmetrically distributed on the side of the loading steel plate 210 away from the reservoir model 1, the three hydraulic jacks 320 are fixed to the movable plate 310, and the extension part of the hydraulic jack 320 is located between the movable plate 310 and the loading steel plate 210, and the three hydraulic jacks 320 are connected to the hydraulic pump 322 through the oil pressure pipe 321 of the common part, so that the three hydraulic jacks 320 are in the same state, which is convenient for the same pressure size.

[0059] In addition, according to actual needs, the hydraulic jacks 320 on both sides of the reservoir model 1 can share the same hydraulic pump 322, saving the occupied space of the entire device. The quantitative relationship between the hydraulic jacks 320 and the loading steel plates 210 can also be adjusted according to the actual situation, as long as the above purposes can be achieved.

[0060] Please refer to Figure 2 and Figure 4 , preferably, the thrust assembly further includes a push rod assembly. The push rod assembly includes a spring 331, a guide rod 332, an inner sleeve 333, and an outer sleeve 334. The outer sleeve 334 is sleeved outside the inner sleeve 333 and fixed to the moving plate 310. The guide rod 332 passes through the frame 200, the inner sleeve 333, and the loading steel plate 210 respectively. The spring 331 is sleeved on the outer periphery of the thrust rod and located between the frame 200 and the inner sleeve 333, so that the moving plate 310 moves along the axial direction of the guide rod 332.

[0061] It can be understood that the thrust assembly further includes a push rod assembly provided with a spring 331, a guide rod 332, an inner sleeve 333, and an outer sleeve 334. Through the inner sleeve 333 and the outer sleeve 334, the moving plate 310 can move along the axial direction of the guide rod 332 under the action of the spring 331 located between the frame 200 and the inner sleeve 333. Among them, the spring 331 is sleeved on the outer periphery of the thrust rod and is always in a compressed state, so that the moving plate 310 drives the hydraulic jack 320 to keep in contact with the loading steel plate 210.

[0062] Among them, four push rod assemblies are correspondingly arranged for each loading steel plate 210. The axes of the four push rod assemblies are all parallel to each other. The push rod assemblies and the hydraulic jacks 320 on both sides of the reservoir model 1 are preferably in corresponding positions.

[0063] Preferably, both the outer sleeve 334 and the inner sleeve 333 are provided with a bending portion 335, and the bending portion 335 is used to prevent the outer sleeve 334 and the inner sleeve 333 from detaching from the moving plate 310.

[0064] In this embodiment, both the outer sleeve 334 and the inner sleeve 333 are provided with a bending portion 335. The diameter of the bending portion 335 of the inner sleeve 333 is larger than the inner diameter of the outer sleeve 334, which is used to prevent the inner sleeve 333 from detaching from the outer sleeve 334. The diameter of the bending portion 335 of the outer sleeve 334 is larger than the diameter of the through hole of the moving plate 310 for installing the outer sleeve 334, which is used to prevent the outer sleeve 334 from detaching from the moving plate 310, and thus can prevent the inner sleeve 333 from detaching from the moving plate 310.

[0065] It should be noted that the diameter of the spring 331 is preferably smaller than the diameter of the bent portion 335 of the inner sleeve 333, which is used to ensure the contact between the spring 331 and the inner sleeve 333, so that the inner sleeve 333 can drive the outer sleeve 334 and the moving plate 310 to move in a fixed direction.

[0066] Preferably, the guide rod 332 is detachably connected to the loading steel plate 210 through the fixing member 336, and the fixing member 336 is specifically a nut.

[0067] It can be understood that the guide rod 332 is detachably connected to the loading steel plate 210, and the end of the guide rod 332 is connected to the loading steel plate 210 through the fixing member 336.

[0068] Among them, the end of the guide rod 332 is preferably a threaded structure, the fixing member 336 is preferably a nut, and the type of the fixing member 336 can be adjusted according to the actual situation as long as the fixing of the guide rod 332 can be achieved.

[0069] Please refer to Figure 3 , preferably, pulleys 230 are provided at the bottom of the frame 200, and the pulleys 230 can drive the frame 200 to move. A bracket 431 is provided at the bottom of the infrared thermal imager 430, and the bracket 431 can be telescoped to adjust the height of the infrared thermal imager 430.

[0070] It should be noted that pulleys 230 for moving the frame 200 are also provided at the bottom of the frame 200. The frame 200 can be moved and supported through the pulleys 230, and the pulleys 230 are preferably located around the outside of the frame 200.

[0071] In addition, a telescopic bracket 431 is also provided at the bottom of the infrared thermal imager 430, and the height of the infrared thermal imager 430 can be adjusted by adjusting the bracket 431.

[0072] Preferably, the plate structure 220 is a transparent acrylic plate.

[0073] In this embodiment, in order to facilitate the observation of the reservoir model 1 after injecting liquid CO2, the plate structure 220 is a transparent acrylic plate, and the specific type of the plate structure 220 can be selected according to the actual situation as long as the above purpose can be achieved.

[0074] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0075] The above has introduced the embodiments provided by the present invention in detail. Specific examples are used herein to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A THMC coupling relationship test device for CO2 storage in saline water layers, used to observe a reservoir model (1) after liquid CO2 is introduced, characterized in that: The THMC coupling relationship test equipment includes: A weighing sensor (100) for placing and weighing the reservoir model (1); A frame (200) is sleeved on the outside of the reservoir model (1), the frame (200) comprising a loading steel plate (210) and a plate structure (220) respectively attached to the reservoir model (1), a side of the loading steel plate (210) facing away from the reservoir model (1) being connected to a thrust assembly so that the loading steel plate (210) is in a force-holding state; A test workpiece, comprising an osmotic pressure micro-element (410), a pH value probe (420) and an infrared thermal imager (430), wherein the osmotic pressure micro-element (410) and the pH value probe (420) are both located inside the reservoir model (1) and are used to obtain the osmotic pressure and pH value of the reservoir model (1) in real time, and the infrared thermal imager (430) is located outside the frame (200) and is arranged corresponding to the plate structure (220) to obtain the surface temperature of the reservoir model (1) in real time; The loading steel plates (210) are located at the top and left and right sides of the reservoir model (1); It also includes a central control system (500), a data acquisition box (600) and a data acquisition station (700), the osmotic pressure micro-element (410) and the pH value probe (420) are both connected to the data acquisition box (600), the weighing sensor (100) is connected to the data acquisition station (700), and the central control system (500) is connected to the data acquisition box (600), the data acquisition station (700) and the infrared thermal imager (430) to obtain the information to be measured at each position of the reservoir model (1) in real time; The osmotic pressure micro-component (410), the pH value probe (420) and the weighing sensor (100) are all in plurality, and the plurality of osmotic pressure micro-components (410), the pH value probe (420) and the weighing sensor (100) are uniformly arranged in a horizontal direction, and adjacent osmotic pressure micro-components (410) and pH value probes (420) are spaced apart in the upper and lower directions; A movable plate (310) is provided between the frame (200) and the loading steel plate (210), and the thrust assembly comprises a hydraulic jack (320) provided on the movable plate (310), and the hydraulic jack (320) is connected to a hydraulic pump (322) via an oil pressure pipe (321), so that the hydraulic jack (320) can be extended and retracted along its own axis, and is used to press the loading steel plate (210); The thrust assembly also includes a push rod assembly, which includes a spring (331), a guide rod (332), an inner sleeve (333) and an outer sleeve (334), wherein the outer sleeve (334) is sleeved on the outside of the inner sleeve (333) and fixed to the movable plate (310), the guide rod (332) is respectively penetrated through the frame (200), the inner sleeve (333) and the loading steel plate (210), the spring (331) is sleeved on the outer periphery of the thrust rod and is located between the frame (200) and the inner sleeve (333), so that the movable plate (310) moves axially along the guide rod (332); The spring (331) is always in a compressed state, so that the movable plate (310) drives the hydraulic jack (320) to remain in contact with the loading steel plate (210); The outer sleeve (334) and the inner sleeve (333) are both provided with a bending portion (335), and the bending portion (335) is used to prevent the outer sleeve (334) and the inner sleeve (333) from detaching from the moving plate (310); The diameter of the bent portion (335) of the inner sleeve (333) is larger than the inner diameter of the outer sleeve (334), so as to prevent the inner sleeve (333) from being separated from the outer sleeve (334); the diameter of the bent portion (335) of the outer sleeve (334) is larger than the diameter of the through hole of the movable plate (310) for mounting the outer sleeve (334), so as to prevent the outer sleeve (334) from being separated from the movable plate (310); The guide rod (332) is detachably connected to the loading steel plate (210) via a fixing member (336), and the fixing member (336) is specifically a nut.

2. The THMC coupling relationship test equipment for saline CO2 storage according to claim 1, characterized in that: The osmotic pressure micro-element (410) and the pH probe (420) are connected to the data acquisition box (600) via a cable (440).

3. The THMC coupling relationship test equipment for saline CO2 storage according to claim 1, characterized in that: A pulley (230) is provided at the bottom of the frame (200), and the pulley (230) can drive the frame (200) to move. A bracket (431) is provided at the bottom of the infrared thermal imager (430), and the bracket (431) can be extended to adjust the height of the infrared thermal imager (430).

4. The THMC coupling relationship test equipment for saline CO2 storage according to any one of claims 1 to 3, characterized in that: The plate structure (220) is a transparent acrylic plate.

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