A supercritical CO2 storage and damage monitoring test device

Abstract

The present invention relates to the technical field of supercritical CO2 storage experimental devices, and in particular to a supercritical CO2 storage and damage monitoring experimental device. It comprises a workbench, the workbench is fixedly connected to a support table through a fixed seat, the symmetrical sliding frame is commonly fixedly connected to a heating shell, the inner wall of the heating shell is fixedly connected to a connecting shell, the connecting shell is sealed and slidably connected to an extrusion piece with an ultrasonic transmitter embedded in the middle, the support table is embedded with an ultrasonic receiver, and the inner wall of the connecting shell is fixedly connected to two confining pressure diaphragms that cooperate with the inner wall of the connecting shell to form a confining pressure cavity. The present invention applies different axial pressures and confining pressures to the stone column, uses an experimental terminal to experiment on the degree of damage of the stone column, monitors the evolution of sample damage under different supercritical CO2 storage conditions in real time from multiple angles, and obtains the best sealing effect while ensuring the safety of the sealing.

Description

Technical Field

[0001] The invention relates to the technical field of supercritical CO2 storage experimental devices, and in particular to a supercritical CO2 storage and damage monitoring experimental device. Background Art

[0002] CO2 can absorb and re-radiate long-wave infrared radiation emitted from the earth's surface, thus affecting the earth's energy balance and raising the global average temperature. It is now generally believed that in addition to developing clean energy, there is another technology that is to store CO2 in structurally intact underground reservoirs. CO2 storage technology refers to injecting captured CO2 into deep underground geological structures in a supercritical state for long-term storage to cope with the "greenhouse effect."

[0003] In current research, there is very little research on the damaging effects of supercritical CO2 storage on reservoirs. Therefore, there is insufficient understanding of the damage caused by supercritical CO2 storage to reservoirs. It is impossible to measure the exact storage parameters for different reservoir structures to evaluate the degree of damage caused by supercritical CO2 to different reservoirs, and it is impossible to provide effective data support for the on-site implementation of CO2 storage. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a supercritical CO2 storage and damage monitoring test device.

[0005] The technical solution adopted by the present invention is:

[0006] A supercritical CO2 storage and damage monitoring test device comprises a workbench, wherein the workbench is fixedly connected to a support platform through a fixed seat, the workbench is fixedly connected to a fixed plate through symmetrical support columns, the support columns are slidably connected to a sliding frame, the fixed plate is fixedly connected to a symmetrical first push rod whose telescopic end is fixed to an adjacent sliding frame, the symmetrical sliding frames are commonly fixedly connected to a heating jacket, the inner wall of the heating jacket is fixedly connected to a connecting shell, the heating jacket and the connecting shell are both sealed and matched with the support platform, the connecting shell is sealed and slidably connected to an extrusion piece with an ultrasonic transmitter embedded in the middle, the fixed plate is embedded with a second push rod whose telescopic end is fixed to the extrusion piece, the support platform is embedded with an ultrasonic receiver, the connecting shell and the support platform are respectively embedded with a liquid injection pipeline and a liquid outlet pipeline, the inner wall of the connecting shell is fixedly connected to two confining pressure diaphragms that cooperate with the inner wall of the connecting shell to form a confining pressure cavity, the heating jacket and the connecting shell are commonly embedded with symmetrical connecting pipes, and the connecting shell is provided with an auxiliary detection mechanism, which detects the test piece using sound waves.

[0007] It is further explained that the portion of the extrusion member located within the connecting shell is provided with evenly distributed through holes to facilitate the flow of supercritical CO2 along the test piece.

[0008] It is further explained that the support platform is provided with a surrounding boss for increasing the contact area between the support platform and the connecting shell and the heating jacket shell.

[0009] It is further explained that the confining pressure diaphragm is configured as a metal diaphragm.

[0010] Further description, the auxiliary detection mechanism includes a connecting ring, which is arranged in the connecting shell, and the symmetrical confining pressure diaphragms are in contact and cooperate with the connecting ring. The connecting shell and the heating sleeve shell are jointly embedded with circumferentially evenly spaced sound wave conduction rods, and the near ends of the circumferentially evenly spaced sound wave conduction rods are fixedly connected to the connecting ring.

[0011] Further description, it also includes a loading calibration mechanism, which is arranged on the upper side of the workbench, and is used to drive the test piece to automatically move to the upper side of the support platform. The loading calibration mechanism includes a symmetrical fixed frame, and the symmetrical fixed frames are all fixedly connected to the workbench, and the symmetrical fixed frames are respectively located on both sides of the support platform. The fixed frames are slidably connected to sliding plates, and the side of the sliding plate away from the workbench is fixedly connected with symmetrical guide rails, and the symmetrical guide rails located on the front side are installed with electric wheels, and arc plates are fixedly connected between the symmetrical electric wheels through the mounting frame, and the symmetrical fixed frames are all fixedly connected with first telescopic rods, and the telescopic ends of the first telescopic rods are fixedly connected to the adjacent sliding plates.

[0012] It is further explained that a rack is arranged on the upper side of the guide rail, and the racks on the front and rear adjacent guide rails cooperate with each other to form a complete rack.

[0013] It is further explained that a gear ring is provided in the middle of the electric wheel, and the gear ring on the electric wheel is meshed with the rack on the adjacent guide rail to improve the movement accuracy of the electric wheel.

[0014] Further description: The radius of the inner side surface of the arc plate is the same as the radius of the specimen, the specimen is in fit with the inner side surface of the arc plate, the center point of the arc plate is located on the central axis of the specimen, the symmetrical sliding plates are both provided with arc-shaped grooves that contact and cooperate with the support platform, and the upper side surface of the sliding plate is flush with the upper side surface of the support platform.

[0015] Further description, the anti-collapse assembly includes a telescopic ring, an annular groove is provided on the upper side of the support platform, the telescopic ring is slidably connected to the annular groove of the support platform, a symmetrical second telescopic rod is fixedly connected to the annular groove of the support platform, and the telescopic ends of the symmetrical second telescopic rods are both fixedly connected to the telescopic ring.

[0016] The beneficial technical effects of the present invention are:

[0017] The present invention simulates the reservoir environment by applying different axial pressures and confining pressures to the stone column and controlling the temperature in the connecting shell, experiments are conducted on the damage degree of the stone column by using the experimental terminal, and the evolution process of the supercritical CO2 damaged sample under different sealing conditions is monitored in real time from multiple angles. More experimental parameters are obtained by controlling the sealing time of the supercritical CO2 in the pressure chamber and changing the annular pressure and axial pressure on the rock column, so as to obtain the best sealing effect under the premise of ensuring the sealing safety; the telescopic ring is used in conjunction with the connecting shell to prevent the stone column from being broken and collapsed after the experiment is completed, which makes it difficult to clean up later and increases the labor intensity of the experimenters; the reciprocating movement of the arc plate can not only push the stone column after the experiment to the rear side, but also push the stone column to be tested to the top of the support platform, so that the central axis of the stone column to be tested coincides with the central axis of the support platform, and the experimenters no longer need to calibrate the position of the stone column, thereby reducing the labor intensity of the experimenters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the fixing seat and the heating sleeve and other parts of the present invention;

[0020] Figure 3 It is a cross-sectional view of the heating sleeve shell and the connecting shell and other parts of the present invention;

[0021] Figure 4 It is a cross-sectional view of the confining pressure diaphragm and the connecting ring and other parts of the present invention;

[0022] Figure 5 It is a side view of the sliding plate, guide rail and other parts of the present invention;

[0023] Figure 6 It is a side view of the fixing frame, sliding plate and other parts of the present invention;

[0024] Figure 7 Parts such as the electric wheel and the arc plate of the present invention;

[0025] Figure 8 is a cross-sectional view of a fixing frame and a sliding plate of the present invention;

[0026] Fig. 9 It is a bottom view of the fixing frame and the sliding plate of the present invention.

[0027] In the figure: 1: workbench, 2: fixed seat, 3: support table, 4: support column, 5: fixed plate, 6: sliding frame, 7: first push rod, 8: heating sleeve shell, 9: connecting shell, 10: extrusion piece, 11: ultrasonic transmitter, 12: second push rod, 13: ultrasonic receiver, 14: injection pipeline, 15: liquid outlet pipeline, 16: confining pressure diaphragm, 17: connecting pipe, 18: connecting ring, 19: sound wave conduction rod, 20: fixed frame, 21: sliding plate, 22: guide rail, 23: electric wheel, 24: arc plate, 25: first telescopic rod, 26: telescopic ring, 27: second telescopic rod. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0029] Example 1

[0030] A supercritical CO2 storage and damage monitoring test device, such as Figure 1-Figure 3As shown, it includes a workbench 1, a fixed seat 2 is fixedly connected to the upper side of the workbench 1, a support table 3 is fixedly connected to the upper end of the fixed seat 2, the workbench 1 is fixedly connected to four symmetrical support columns 4, the four support columns 4 are commonly fixedly connected to a fixed plate 5, the fixed plate 5 is located above the workbench 1, and a sliding frame 6 is commonly slidably connected between the front and rear adjacent support columns 4, the fixed plate 5 is fixedly connected to four symmetrical first push rods 7, the telescopic ends of the first push rods 7 are fixedly connected to the adjacent sliding frames 6, the telescopic ends of the first push rods 7 are used to drive the adjacent sliding frames 6 to slide along the adjacent support columns 4, the two sliding frames 6 are commonly fixedly connected to a heating shell 8 electrically connected to the experimental terminal, the heating shell 8 is an existing device, and its internal heating structure is not shown in the attached drawings, the heating shell 8 The inner wall is fixedly connected with a connecting shell 9, the lower sides of the heating shell 8 and the connecting shell 9 are sealed with the support platform 3, the connecting shell 9 and the support platform 3 cooperate to form a sealed pressure chamber, the heating shell 8 is used to ensure the temperature inside the pressure chamber, so that CO2 is kept in a supercritical state, the connecting shell 9 is sealed and slidably connected with an extrusion piece 10, the extrusion piece 10 is located at the upper part of the connecting shell 9, the middle part of the extrusion piece 10 is embedded with an ultrasonic transmitter 11, the fixing plate 5 is embedded with a second push rod 12, the extrusion piece 10 is fixedly connected to the telescopic end of the second push rod 12, the support platform 3 is embedded with an ultrasonic receiver 13, the ultrasonic transmitter 11 and the ultrasonic receiver 13 are electrically connected to the experimental terminal, and the ultrasonic transmitter 11 and the ultrasonic receiver 13 cooperate with each other to test the stone column. The damage state is monitored, the connecting shell 9 and the support platform 3 are respectively embedded with a liquid injection pipeline 14 and a liquid outlet pipeline 15, the liquid injection pipeline 14 is used to stably inject liquid CO2 into the pressure chamber, and the liquid outlet pipeline 15 is used to discharge the residual gas in the pressure chamber. The inner wall of the connecting shell 9 is fixedly connected with two symmetrical confining pressure diaphragms 16, and the confining pressure diaphragms 16 cooperate with the inner wall of the connecting shell 9 to form a confining pressure cavity. The heating shell 8 and the connecting shell 9 are jointly embedded with two symmetrical connecting pipes 17, and the two connecting pipes 17 both penetrate the connecting shell 9. By injecting hydraulic oil into the confining pressure cavity, the confining pressure diaphragm 16 applies annular pressure to the stone column, and the extrusion piece 10 and the two confining pressure diaphragms 16 simultaneously apply pressure to the stone column to simulate the reservoir environment. The connecting pipe 17 and the first push rod 7 and the second push rod 12 are both connected to the hydraulic system, and the hydraulic system is electrically connected to the experimental terminal. The connecting shell 9 is provided with an auxiliary detection mechanism, which uses sound waves to detect the test piece. The part of the extrusion piece 10 located in the connecting shell 9 is provided with evenly distributed through holes, which is convenient for supercritical CO2 to flow along the test piece. The liquid CO2 is converted into a supercritical state in the pressure chamber. The supercritical CO2 flows downward through the through holes of the extrusion piece 10 and penetrates into the stone column. The support platform 3 is provided with a surrounding boss to increase the contact area between the support platform 3 and the connecting shell 9 and the heating shell 8, and improve the sealing between the heating shell 8 and the connecting shell 9 and the support platform 3. The confining pressure diaphragm 16 is set as a metal diaphragm to increase the service life of the confining pressure diaphragm 16.

[0031] like Figure 3 and Figure 4 As shown, the auxiliary detection mechanism includes a connecting ring 18, which is arranged in the connecting shell 9. The two confining pressure diaphragms 16 are in contact with the connecting ring 18. The connecting ring 18 is set to a soft material. The connecting shell 9 and the heating sleeve are embedded with four sound wave conduction rods 19 with circumferential equal spacing. The four sound wave conduction rods 19 are all connected to the acoustic emission collector, and the experimental terminal of the acoustic emission collector is electrically connected. The near ends of the four sound wave conduction rods 19 are fixedly connected to the connecting ring 18, and the four sound wave conduction rods 19 are used to monitor the damage status inside the stone column.

[0032] When the device is used for experiment, in the initial state, the lower sides of the heating sleeve 8 and the connecting shell 9 are not in contact with the support platform 3. Then the experimenter places the test piece (stone column) on the upper side of the support platform 3. The test piece is a stone column with a diameter of 50 mm and a height of 100 mm. At the same time, the experimenter adjusts the position of the stone column so that the central axis of the stone column coincides with the central axis of the support platform 3. Then the experimenter activates the start button of the experimental terminal, and the experimental terminal starts the hydraulic system to inject hydraulic oil into the second push rod 12 and the four first push rods 7. The telescopic ends of the four first push rods 7 and the second push rods 12 move downward synchronously. The telescopic ends of the four first push rods 7 drive the two sliding frames 6 to drive the heating sleeve 8 and the extrusion piece 10 to move synchronously until the lower sides of the heating sleeve 8 and the connecting shell 9 are squeezed on the support platform 3. At this time, under the extrusion force of the telescopic ends of the four first push rods 7, The heating sleeve 8 and the connecting shell 9 are in a sealed state with the support platform 3. In the above process, the extrusion piece 10 and the heating sleeve 8 move downward synchronously. Then the hydraulic system controls the hydraulic oil pressure in the four first push rods 7 to remain unchanged, and continues to inject hydraulic oil into the two connecting pipes 17 and the second push rod 12. The telescopic end of the second push rod 12 drives the extrusion piece 10 to move downward, and the extrusion piece 10 is squeezed downward on the upper side of the rock column. At the same time, the hydraulic oil flows into the two confining pressure cavities (between the confining pressure diaphragm 16 and the connecting shell 9) through the two connecting pipes 17. The extrusion piece 10 is squeezed downward and cooperates with the support platform 3 to apply axial pressure to the rock column. The two confining pressure diaphragms 16 squeeze the outside of the rock column to apply annular pressure. At the same time, the experimental terminal starts the heating sleeve 8, and the heating sleeve 8 heats the rock column inside it and keeps the temperature unchanged. At this time, the four sound wave conduction rods 19 are tightly fitted with the rock column.

[0033] After applying annular pressure and axial pressure to the rock column, the experimental terminal controls the pressure of the hydraulic oil injected into the confining pressure cavity and the second push rod 12, thereby controlling the annular pressure and axial pressure on the rock column, and then stably injects liquid CO2 into the injection pipeline 14. After opening the valve on the injection pipeline 14, the liquid CO2 enters the pressure chamber between the support platform 3 and the connecting shell 9. Under the action of the heating sleeve 8, the temperature in the pressure chamber is controlled, so that the liquid CO2 is converted into supercritical CO2 and sealed. By controlling the pressure of the liquid CO2 injected into the pressure chamber, the CO2 in the pressure chamber is maintained in a supercritical state. At this time, the four sound wave conduction rods 19 transmit the detection signal to the acoustic emission collector. The detection signal is analyzed by the acoustic emission collector to obtain the experimental parameters. The collector transmits the experimental parameters to the experimental terminal, thereby monitoring the internal damage state of the rock column and reflecting the evolution process of the internal cracks. At the same time, the ultrasonic transmitter 11 transmits a sound wave signal, which is received by the ultrasonic receiver 13 after passing through the rock column. The signal received by the ultrasonic receiver 13 is transmitted to the experimental terminal, and the corresponding parameters are calculated and obtained through the experimental terminal. Then, the damage caused to the rock column by supercritical CO2 at different sealing times is analyzed and monitored, and the experimental parameters obtained from the monitoring are recorded. After the sealing experiment is completed, the valve of the injection pipeline 14 is closed and the valve of the liquid outlet pipeline 15 is opened to discharge the CO2 in the pressure chamber. Then the ultrasonic transmitter 11 and the ultrasonic receiver 13 are stopped at the experimental terminal, and the experimental terminal stops working with the acoustic emission collector.

[0034] The experimental terminal will monitor and save the test parameters, and then control the hydraulic system to reduce the pressure of the hydraulic oil in the two confining pressure chambers to reset the confining pressure diaphragm 16, and then control the telescopic end of the second push rod 12 to move upward and reset, and the extrusion piece 10 loses contact with the upper side of the rock column. Then the hydraulic system controls the telescopic ends of the four first push rods 7 to move upward at the same time. Driven by the two sliding frames 6, the heating sleeve 8 and the connecting shell 9 move upward and reset synchronously. The experimental terminal shuts down the hydraulic system, and the experimenter replaces the new rock column to be tested, and then repeats the above operation to continue the experiment on the rock column. During the experiment, by controlling the sealing time of supercritical CO2 in the pressure chamber and changing the annular pressure and axial pressure on the rock column at the same time, more experimental parameters are obtained, and the best sealing effect is obtained under the premise of ensuring the sealing safety.

[0035] Example 2

[0036] On the basis of Example 1, Figure 5-Figure 9As shown, it also includes a loading calibration mechanism, which is arranged on the upper side of the workbench 1. The loading calibration mechanism is used to drive the test piece to automatically move to the upper side of the support platform 3. The loading calibration mechanism includes two symmetrical fixed frames 20, and the two fixed frames 20 are both fixedly connected to the workbench 1. The two fixed frames 20 are respectively located on the front and rear sides of the support platform 3. The fixed frames 20 are slidably connected to a sliding plate 21. The two sliding plates 21 have the same height. The upper side of the sliding plate 21 is fixedly connected with two symmetrical guide rails 22. The two guide rails 22 located on the front side are installed with electric wheels 23 electrically connected to the experimental terminal. The electric wheel 23 is an existing electric device, and its specific structure is not shown in the accompanying drawings. An arc plate 24 is fixedly connected between the two electric wheels 23 through a mounting frame. The arc plate 24 slides along the upper side of the front sliding plate 21. The two fixed frames 20 are both fixedly connected with an electric wheel 23 electrically connected to the experimental terminal. A first telescopic rod 25 is connected, and the telescopic end of the first telescopic rod 25 is fixedly connected to the adjacent sliding plate 21. The telescopic end of the first telescopic rod 25 is used to drive the adjacent sliding plate 21 to slide along the adjacent fixed frame 20. A rack is provided on the upper side of the guide rail 22. The racks on the front and rear adjacent guide rails 22 cooperate with each other to form a complete rack. A gear ring is provided in the middle of the electric wheel 23. The gear ring on the electric wheel 23 meshes with the rack on the adjacent guide rail 22 to improve the movement accuracy of the electric wheel 23. The radius of the inner side of the arc plate 24 is the same as the radius of the specimen. The specimen fits the inner side of the arc plate 24. The center point of the arc plate 24 is located on the central axis of the specimen, which is used to improve the placement accuracy of the specimen (stone column). The symmetrical sliding plates 21 are all provided with arc grooves that contact and cooperate with the support platform 3, and the upper side of the sliding plate 21 is flush with the upper side of the support platform 3.

[0037] like Figure 3 As shown, the anti-collapse assembly includes a telescopic ring 26, an annular groove is provided on the upper side of the support platform 3, the telescopic ring 26 is slidably connected to the annular groove of the support platform 3, two symmetrical second telescopic rods 27 are fixedly connected to the annular groove of the support platform 3, the telescopic ends of the two second telescopic rods 27 are fixedly connected to the telescopic ring 26, the two second telescopic rods 27 are connected to the hydraulic system, the telescopic ring 26 moves upward synchronously with the connecting shell 9, and is used to prevent the stone column from breaking after the experiment is completed, and to avoid the stone column from collapsing when the connecting shell 9 moves upward and resets.

[0038] When the rock column needs to be replaced, the rock column after the inspection needs to be removed from the support platform 3. During the process of the heating sleeve shell 8 and the connecting shell 9 moving upward and resetting, the experimental terminal starts the two first telescopic rods 25, and the two first telescopic rods 25 respectively drive the adjacent sliding plates 21 to move, and the sliding plates 21 on the front and rear sides slide along the adjacent fixing frames 20 respectively until the opposite sides of the two sliding plates 21 are squeezed and contacted, and the front and rear adjacent guide rails 22 are butt-jointed with each other. During the above process, the heating sleeve shell 8 and the connecting shell 9 move upward and separate from the support platform 3, and at the same time, the hydraulic system injects hydraulic oil into the two second telescopic rods 27, and the telescopic ends of the two second telescopic rods 27 drive the telescopic ring 26 to move upward, and the telescopic ring 26 moves upward. The speed is the same as the speed at which the connecting shell 9 moves upward. After the telescopic end of the second telescopic rod 27 is extended to the maximum extent, the connecting shell 9 is separated from the telescopic ring 26. Before the two sliding plates 21 contact, when the connecting shell 9 moves upward, the telescopic ring 26 contacts the lower side of the connecting shell 9, preventing the stone column from breaking and collapsing after the experiment is completed, making it difficult to clean up later and increasing the labor intensity of the experimenters. After the connecting shell 9 is separated from the telescopic ring 26, the opposite sides of the two sliding plates 21 are squeezed and contacted, and the arc-shaped grooves of the two sliding plates 21 fit on the front and rear sides of the support platform 3. Then the hydraulic system controls the two second telescopic rods 27 to drive the telescopic ring 26 to reset, and the upper side surfaces of the two sliding plates 21 are flush with the upper side surfaces of the support platform 3.

[0039] After the heating sleeve shell 8 and the connecting shell 9 are reset, the experimenter then starts the two electric wheels 23 through the experimental terminal, and the two electric wheels 23 on the front side drive the arc plate 24 to move backward, and the arc plate 24 pushes the stone column to move backward after the experiment is completed. At this time, the two electric wheels 23 move to the two guide rails 22 on the rear side at the same time, so that the arc plate 24 pushes the stone column to be tested to the sliding plate 21 on the rear side for storage. Then the experimental terminal controls the two electric wheels 23 to roll and reset to the front side, and then the stone column to be tested is placed on the rear side of the arc plate 24, and the outer side of the stone column is fitted with the rear side of the arc plate 24, and then the above operation is repeated to make the arc plate 24 push the stone column to be tested to move backward until the arc plate 24 The center of the circle is located on the central axis of the support platform 3. The experimental terminal controls the electric wheel 23 to reset. At this time, the central axis of the stone column to be tested coincides with the central axis of the support platform 3. The experimental terminal controls the telescopic ends of the two first telescopic rods 25 to reset and close, and the two sliding plates 21 move away from each other and reset. Both sliding plates 21 lose contact with the support platform 3, and then the supercritical CO2 storage and damage experiments on the stone column are continued. The reciprocating movement of the arc plate 24 can not only push the stone column after the experiment to the rear side, but also push the stone column to be tested to the top of the support platform 3, so that the central axis of the stone column to be tested coincides with the central axis of the support platform 3. The experimenters no longer need to calibrate the position of the stone column, which reduces the labor intensity of the experimenters.

[0040] It should be understood that the above description is only for exemplary purposes and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A supercritical CO2 storage and damage monitoring test device, characterized by: The slidable platform is connected to the support frame via a fixed seat, the slidable platform is connected to the fixed plate via a symmetrical support column, the support column is slidably connected to a sliding frame, the fixed plate is fixedly provided with a symmetrical first push rod whose telescopic end is fixed to an adjacent sliding frame, the symmetrical sliding frames are commonly fixedly provided with a heating jacket shell, the inner wall of the heating jacket shell is fixedly provided with a connecting shell, the heating jacket shell and the connecting shell are both sealed with the support frame, the connecting shell is sealed and slidably connected with an extrusion member with an ultrasonic transmitter embedded in the middle, the fixed plate is embedded with a second push rod whose telescopic end is fixed to the extrusion member, the support frame is embedded with an ultrasonic receiver, the connecting shell and the support frame are respectively embedded with an injection pipeline and a liquid outlet pipeline, the inner wall of the connecting shell is fixedly provided with two confining pressure diaphragms which cooperate with the inner wall of the connecting shell to form a confining pressure cavity, the heating jacket shell and the connecting shell are commonly embedded with symmetrical connecting pipes, and the connecting shell is provided with an auxiliary detection mechanism, which detects the test piece using sound waves.

2. The supercritical CO2 storage and damage monitoring test device according to claim 1 is characterized in that: The portion of the extrusion piece located within the connecting shell is provided with evenly distributed through holes to facilitate the flow of supercritical CO2 along the test piece.

3. The supercritical CO2 storage and damage monitoring test device according to claim 2 is characterized in that: The support platform is provided with a surrounding boss for increasing the contact area between the support platform and the connecting shell and the heating jacket shell.

4. The supercritical CO2 storage and damage monitoring test device according to claim 1 is characterized in that: The confining pressure diaphragm is configured as a metal diaphragm.

5. The supercritical CO2 storage and damage monitoring test device according to claim 3 is characterized by: The auxiliary detection mechanism includes a connecting ring, which is arranged in the connecting shell. The symmetrical confining pressure diaphragms are in contact with the connecting ring. The connecting shell and the heating sleeve shell are jointly embedded with sound wave conduction rods with circumferentially equal spacing. The near ends of the sound wave conduction rods with circumferentially equal spacing are fixedly connected to the connecting ring.

6. The supercritical CO2 storage and damage monitoring test device according to claim 1 is characterized by: The loading and calibration mechanism is also included, which is arranged on the upper side of the workbench, and is used to drive the test piece to automatically move to the upper side of the support platform. The loading and calibration mechanism includes a symmetrical fixing frame, and the symmetrical fixing frames are all fixedly connected to the workbench, and the symmetrical fixing frames are respectively located on both sides of the support platform. The fixing frames are slidably connected to sliding plates, and the side of the sliding plate away from the workbench is fixedly connected with symmetrical guide rails, and the symmetrical guide rails located on the front side are installed with electric wheels, and arc plates are fixedly connected between the symmetrical electric wheels through the mounting frame, and the symmetrical fixing frames are all fixedly connected with first telescopic rods, and the telescopic ends of the first telescopic rods are fixedly connected to the adjacent sliding plates.

7. The supercritical CO2 storage and damage monitoring test device according to claim 6 is characterized by: A rack is arranged on the upper side of the guide rail, and the racks on the front and rear adjacent guide rails cooperate with each other to form a complete rack.

8. The supercritical CO2 storage and damage monitoring test device according to claim 7 is characterized by: A gear ring is arranged in the middle of the electric wheel, and the gear ring on the electric wheel is meshed with the rack on the adjacent guide rail to improve the movement accuracy of the electric wheel.

9. The supercritical CO2 storage and damage monitoring test device according to claim 6 is characterized by: The radius of the inner side surface of the arc plate is the same as the radius of the specimen, the specimen is fitted with the inner side surface of the arc plate, the center point of the arc plate is located on the central axis of the specimen, the symmetrical sliding plates are both provided with arc-shaped grooves that contact and cooperate with the support platform, and the upper side of the sliding plate is flush with the upper side of the support platform.

10. The supercritical CO2 storage and damage monitoring test device according to claim 9 is characterized in that: It also includes an anti-collapse component, which includes a telescopic ring. An annular groove is provided on the upper side of the support platform. The telescopic ring is slidably connected to the annular groove of the support platform. A symmetrical second telescopic rod is fixedly connected to the annular groove of the support platform. The telescopic ends of the symmetrical second telescopic rods are both fixedly connected to the telescopic ring.

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