A visual experimental device and method for revealing the geological storage mechanism of carbon dioxide in saline layers

Abstract

The present invention discloses a visual experimental device and method for revealing the geological storage mechanism of carbon dioxide in a saline layer, including: a high-pressure sealed chamber; a pressure stabilizing structure, the pressure stabilizing structure is arranged in the high-pressure sealed chamber; a closed reactor, the closed reactor is arranged in the high-pressure sealed chamber, and the output end of the pressure stabilizing structure is connected to the side end of the closed reactor; a carbon dioxide gas tank, the carbon dioxide gas tank is connected to the closed reactor through a high-pressure pipeline; an ultrasonic monitoring device, the ultrasonic monitoring device is arranged on the outer wall of the side end of the closed reactor; a light wave monitoring device, the light wave monitoring device is arranged on the inner wall of the closed reactor; a data processor, the data processor is used to monitor and record experimental data. The present invention uses the experimental device to visually observe the process of structural storage of carbon dioxide after it is injected into the saline layer, explicitly determine the form of carbon dioxide accumulation caused by the structural storage mechanism, and provide an experimental basis for the improvement of the geological storage mechanism of carbon dioxide.

Description

Technical Field

[0001] The present invention relates to the technical field of geological storage of carbon dioxide, and in particular to a visual experimental device and method for revealing the geological storage mechanism of carbon dioxide in saline layers. Background Art

[0002] Saline layers are widely distributed underground as permeable porous media. They are considered to be ideal reservoirs for geological storage of carbon dioxide due to their huge storage space. At present, the research on geological storage of carbon dioxide in saline layers is mainly based on theoretical analysis and numerical simulation. Therefore, the formed storage mechanism is mostly based on assumptions or hypotheses, lacking explicit and intuitive revelation of indoor experiments. Since there is no intuitive and visual experimental revelation of the storage mechanism, the geological storage mechanism of carbon dioxide in saline layers is not perfect. Therefore, it is urgent to reveal the new mechanism of carbon dioxide storage in saline layers through indoor experiments and verify the existing geological storage mechanism of carbon dioxide at the same time. It is worth noting that before conducting indoor experiments, it is necessary to first develop a visual experimental device and method to reveal the geological storage mechanism of carbon dioxide in saline layers to ensure the normal development of indoor experiments. Summary of the invention

[0003] The purpose of the present invention is to provide a visual experimental device and method for revealing the geological storage mechanism of carbon dioxide in saline layers. The experimental device can be used to visually observe the process of structural storage of carbon dioxide after it is injected into the saline layer, and the form of carbon dioxide accumulation caused by the structural storage mechanism can be explicitly determined, thereby providing an experimental basis for the improvement of the geological storage mechanism of carbon dioxide.

[0004] In order to achieve the purpose of the present invention, the present invention provides a visualization experimental device and method for revealing the geological storage mechanism of carbon dioxide in saline layers, including: a high-pressure closed chamber; a pressure stabilizing structure, the pressure stabilizing structure is arranged in the high-pressure closed chamber; a closed reactor, the closed reactor is arranged in the high-pressure closed chamber, and the output end of the pressure stabilizing structure is connected to the side end of the closed reactor; a carbon dioxide gas tank, the carbon dioxide gas tank is connected to the closed reactor through a high-pressure pipeline; a supercritical device, the supercritical device is arranged in the high-pressure pipeline; a pressure sensor, the pressure sensor is arranged on the inner wall of the closed reactor; an ultrasonic monitoring device, the ultrasonic monitoring device is arranged on the outer wall of the side end of the closed reactor; a light wave monitoring device, the light wave monitoring device is arranged on the inner wall of the closed reactor; a data processor, the data processor is used to monitor and record experimental data.

[0005] As a preferred technical solution of the present invention, a bottom rock is provided at the bottom end of the closed reactor, an annular sunken groove is provided in the middle of the inner wall of the closed reactor, a cap rock is fixedly connected to the annular sunken groove, a lower salt water layer is provided between the bottom rock and the cap rock, and an upper salt water layer is provided on the top of the cap rock.

[0006] As a preferred technical solution of the present invention, an air pump is provided at the output end of the carbon dioxide gas tank, and the air pump is used to control the opening and closing state of the high-pressure pipeline. The high-pressure pipeline penetrates the upper salt water layer and the cap rock and then extends into the lower salt water layer.

[0007] As a preferred technical solution of the present invention, the number of the pressure sensors is two, and the two pressure sensors are respectively arranged in the upper salt water layer and the lower salt water layer.

[0008] As a preferred technical solution of the present invention, the top of the bottom rock is configured as a pointed structure.

[0009] As a preferred technical solution of the present invention, the cap rock is configured as an inverted V-shaped structure.

[0010] As a preferred technical solution of the present invention, hydraulic devices are provided at both ends of the pressure stabilizing structure, a fixed thickened baffle is provided in the middle of the pressure stabilizing structure, the bottom end of the fixed thickened baffle is set as a lower brine area, and the top end of the fixed thickened baffle is set as an upper brine area; the lower brine area is connected to the lower brine layer through a connecting pipe, and the upper brine area is connected to the upper brine layer through a connecting pipe; second pressure sensors are provided at the top and bottom ends of the fixed thickened baffle.

[0011] As a preferred technical solution of the present invention, the ultrasonic monitoring device includes an ultrasonic transmitter and an ultrasonic receiver, and the ultrasonic transmitter and the ultrasonic receiver are arranged around the outer wall of the closed reactor, and the ultrasonic transmitter and the ultrasonic receiver are arranged in a semicircle respectively.

[0012] As a preferred technical solution of the present invention, the pressure sensor, the second pressure sensor, the light wave monitoring device, the ultrasonic transmitter and the ultrasonic receiver are all electrically connected to the data processor; the pressure sensor is used to monitor the pressure value of the salt water layer; the light wave monitoring device is used to monitor the size of the light waves in the salt water and distinguish the color; the ultrasonic transmitter and the ultrasonic receiver are used to monitor the liquid level changes of the salt water layer; the second pressure sensor is used to monitor the pressure value of the salt water area.

[0013] As a preferred technical solution of the present invention, the brine used in the lower brine layer, the upper brine layer, the lower brine area and the upper brine area is a mixed solution of brine: litmus solution in a ratio of 9:1. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the closed reactor of the present invention;

[0016] Figure 3 It is a schematic diagram of the pressure stabilizing structure of the present invention;

[0017] Figure 4 It is a schematic diagram of the installation of the ultrasonic monitoring device of the present invention.

[0018] 1 is a high-pressure-proof sealed chamber, 2 is a pressure-stabilizing structure, 3 is a sealed reactor, 4 is a carbon dioxide gas tank, 5 is a high-pressure pipeline, 6 is a supercritical device, 7 is a pressure sensor, 8 is an ultrasonic monitoring device, 9 is a light wave monitoring device, 10 is a data processor, 11 is a bottom rock, 12 is an annular sunken groove, 13 is a cap rock, 14 is a lower salt water layer, 15 is an upper salt water layer, 16 is an ultrasonic transmitter, 17 is an ultrasonic receiver, 18 is a hydraulic device, 19 is a fixed thickened partition, 20 is a lower salt water area, 21 is an upper salt water area, 22 is a second pressure sensor, 23 is an air pump, and 24 is a connecting pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 4 The embodiment of the present invention provides a visualization experimental device and method for revealing the geological storage mechanism of carbon dioxide in saline layers, including: a high-pressure closed chamber 1; a pressure stabilizing structure 2, the pressure stabilizing structure 2 is arranged in the high-pressure closed chamber 1; a closed reactor 3, the closed reactor 3 is arranged in the high-pressure closed chamber 1, and the output end of the pressure stabilizing structure 2 is connected to the side end of the closed reactor 3; a carbon dioxide gas cylinder 4, the carbon dioxide gas cylinder 4 is connected to the closed reactor 3 through a high-pressure pipeline 5; a supercritical device 6, the supercritical device 6 is arranged in the pipeline of the high-pressure pipeline 5; a pressure sensor 7, the pressure sensor 7 is arranged on the inner wall of the closed reactor 3; an ultrasonic monitoring device 8, the ultrasonic monitoring device 8 is arranged on the outer wall of the side end of the closed reactor 3; a light wave monitoring device 9, the light wave monitoring device 9 is arranged on the inner wall of the closed reactor 3; a data processor 10, the data processor 9 is used to monitor and record experimental data.

[0021] In one embodiment of the present invention, a bottom rock 11 is provided at the bottom end of the closed reactor 3, an annular sunken groove 12 is provided in the middle of the inner wall of the closed reactor 3, a cap rock 13 is fixedly connected to the annular sunken groove 12, a lower salt water layer 14 is provided between the bottom rock 11 and the cap rock 13, and an upper salt water layer 15 is provided at the top of the cap rock 13.

[0022] In one embodiment of the present invention, an air pump 23 is provided at the output end of the carbon dioxide gas tank 4, and the air pump 23 is used to control the opening and closing state of the high-pressure pipeline 5. The high-pressure pipeline 5 penetrates the upper salt water layer 15 and the cap rock 13 and then extends into the lower salt water layer 14.

[0023] In one embodiment of the present invention, the number of the pressure sensors 7 is two, and the two pressure sensors 7 are respectively disposed in the upper salt water layer 15 and the lower salt water layer 14 .

[0024] In one embodiment of the present invention, the top of the bottom rock 11 is configured as a pointed structure.

[0025] In one embodiment of the present invention, the cap rock 13 is configured as an inverted V-shaped structure.

[0026] In one embodiment of the present invention, hydraulic devices 18 are provided at both ends of the pressure stabilizing structure 2, a fixed thickened baffle 19 is provided in the middle of the pressure stabilizing structure 2, the bottom end of the fixed thickened baffle 19 is set as a lower brine area 20, and the top end of the fixed thickened baffle 19 is set as an upper brine area 21; the lower brine area 20 is connected to the lower brine layer 14 through a connecting pipe 24, and the upper brine area 21 is connected to the upper brine layer 15 through a connecting pipe 24; a second pressure sensor 22 is provided at the top and bottom of the fixed thickened baffle 19.

[0027] In one embodiment of the present invention, the ultrasonic monitoring device 8 includes an ultrasonic transmitter 16 and an ultrasonic receiver 17, and the ultrasonic transmitter 16 and the ultrasonic receiver 17 are arranged around the outer wall of the closed reactor 3, and the ultrasonic transmitter 16 and the ultrasonic receiver 17 are arranged in a semicircle respectively.

[0028] In one embodiment of the present invention, the pressure sensor 7, the second pressure sensor 22, the light wave monitoring device 9, the ultrasonic transmitter 16 and the ultrasonic receiver 17 are all electrically connected to the data processor 10; the pressure sensor 7 is used to monitor the pressure value of the salt water layer; the light wave monitoring device 9 is used to monitor the size of the light waves in the salt water and distinguish the color; the ultrasonic transmitter 16 and the ultrasonic receiver 17 are used to monitor the liquid level changes of the salt water layer; the second pressure sensor 22 is used to monitor the pressure value of the salt water area.

[0029] In one embodiment of the present invention, the brine used in the lower brine layer 14, the upper brine layer 15, the lower brine area 20 and the upper brine area 21 is a mixed solution of brine: litmus solution in a ratio of 9:1.

[0030] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A visual experimental device for revealing the geological storage mechanism of carbon dioxide in saline layers, characterized in that: include: A high-pressure-proof sealed chamber (1); a pressure stabilizing structure (2), wherein the pressure stabilizing structure (2) is arranged in the high-pressure-proof sealed chamber (1); a closed reactor (3), wherein the closed reactor (3) is arranged in the high-pressure-proof sealed chamber (1), and the output end of the pressure stabilizing structure (2) is connected to the side end of the closed reactor (3); a carbon dioxide gas cylinder (4), wherein the carbon dioxide gas cylinder (4) is connected to the closed reactor (3) through a high-pressure pipeline (5); a supercritical device (6), wherein the supercritical device (6) is arranged in the pipeline of the high-pressure pipeline (5); a pressure sensor (7), wherein the pressure sensor (7) is arranged on the inner wall of the closed reactor (3); an ultrasonic monitoring device (8), wherein the ultrasonic monitoring device (8) is arranged on the outer wall of the side end of the closed reactor (3); a light wave monitoring device (9), wherein the light wave monitoring device (9) is arranged on the inner wall of the closed reactor (3); and a data processor (10), wherein the data processor (10) is used to monitor and record experimental data; A bottom rock (11) is provided at the bottom end of the closed reactor (3); an annular sunken groove (12) is provided at the middle of the inner wall of the closed reactor (3); a cap rock (13) is fixedly connected to the annular sunken groove (12); a lower salt water layer (14) is provided between the bottom rock (11) and the cap rock (13); and an upper salt water layer (15) is provided at the top of the cap rock (13); The top of the bottom rock (11) is configured as a pointed structure; The cap rock (13) is configured as an inverted V-shaped structure; Hydraulic devices (18) are provided at both ends of the pressure stabilizing structure (2); a fixed thickened baffle (19) is provided in the middle of the pressure stabilizing structure (2); the bottom end of the fixed thickened baffle (19) is set as a lower salt water area (20), and the top end of the fixed thickened baffle (19) is set as an upper salt water area (21); the lower salt water area (20) is connected to the lower salt water layer (14) through a connecting pipe (24), and the upper salt water area (21) is connected to the upper salt water layer (15) through a connecting pipe (24); and second pressure sensors (22) are provided at the top and bottom ends of the fixed thickened baffle (19).

2. The visual experimental device for revealing the geological storage mechanism of carbon dioxide in saline aquifers according to claim 1, characterized in that: An air pump (23) is provided at the output end of the carbon dioxide gas tank (4), and the air pump (23) is used to control the opening and closing state of the high-pressure pipeline (5). The high-pressure pipeline (5) penetrates the upper salt water layer (15) and the cap rock (13) and then extends into the lower salt water layer (14).

3. The visual experimental device for revealing the geological storage mechanism of carbon dioxide in saline layers according to claim 1, characterized in that: The number of the pressure sensors (7) is two, and the two pressure sensors (7) are respectively arranged in the upper salt water layer (15) and the lower salt water layer (14).

4. The visual experimental device for revealing the geological storage mechanism of carbon dioxide in saline layers according to claim 1, characterized in that: The ultrasonic monitoring device (8) comprises an ultrasonic transmitter (16) and an ultrasonic receiver (17), wherein the ultrasonic transmitter (16) and the ultrasonic receiver (17) are arranged around the outer wall of the closed reactor (3), and the ultrasonic transmitter (16) and the ultrasonic receiver (17) are arranged in a semicircle respectively.

5. The visual experimental device for revealing the geological storage mechanism of carbon dioxide in saline layers according to claim 4, characterized in that: The pressure sensor (7), the second pressure sensor (22), the light wave monitoring device (9), the ultrasonic transmitter (16) and the ultrasonic receiver (17) are all electrically connected to the data processor (10); the pressure sensor (7) is used to monitor the pressure value of the salt water layer; the light wave monitoring device (9) is used to monitor the size of the light waves in the salt water and distinguish the color; the ultrasonic transmitter (16) and the ultrasonic receiver (17) are used to monitor the liquid level change of the salt water layer; the second pressure sensor (22) is used to monitor the pressure value of the salt water area.

6. The visual experimental device for revealing the geological storage mechanism of carbon dioxide in saline aquifers according to claim 1, characterized in that: The brine used in the lower brine layer (14), the upper brine layer (15), the lower brine area (20) and the upper brine area (21) is a mixed solution of brine:litmus solution in a ratio of 9:1.

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