Carbon dioxide deep-buried stratum sealing test device

Abstract

The utility model relates to the technical field of carbon dioxide deep-buried stratum sealing and storage, and discloses a carbon dioxide deep-buried stratum sealing and storage test device, which comprises a reaction kettle body, a carbon dioxide storage tank and a carbon dioxide storage tank, the gas supply system comprises a CO2 gas cylinder and a compression part, and CO2 gas in the CO2 gas cylinder is conveyed into the soil body sample in the reaction kettle body through the compression part; the temperature control system comprises a water bath box and a temperature control piece, and the reaction kettle body is fixedly connected in the water bath box, is communicated with the water bath box through the temperature control piece and is used for controlling the temperature in the water bath box; and the data acquisition system is connected with the compression piece and the soil body sample and is used for acquiring pressure data of gas in the compression piece and temperature data in the soil body sample. According to the utility model, not only can the purpose of sealing and storing greenhouse gas be achieved, but also the exploited waste energy reservoir can be effectively utilized, and great practical significance is provided for the protection of the global ecological environment.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide deep burial formation storage technology, and in particular to a carbon dioxide deep burial formation storage test device. Background Technology

[0002] Carbon dioxide sequestration technology has rapidly become a research focus as an effective means of reducing greenhouse gas emissions.

[0003] Currently, the main methods of carbon dioxide sequestration include ecological sequestration, marine sequestration, and mineral sequestration. However, these methods are subject to limitations due to geographical and ecological conditions, are prone to leakage that could adversely affect the ecosystem, have high costs, and limited sequestration potential, which contradicts the concept of green environmental protection.

[0004] Therefore, there is an urgent need for a carbon dioxide deep-buried stratum storage test device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a test device for deep underground carbon dioxide storage to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a carbon dioxide deep-buried stratum storage test device, comprising:

[0007] The reaction vessel body contains soil samples;

[0008] The gas supply system includes a CO2 cylinder and a compressor, wherein the CO2 gas in the CO2 cylinder is delivered to the soil sample inside the reactor body through the compressor;

[0009] A temperature control system includes a water bath and a temperature control component. The reactor body is fixedly connected inside the water bath and communicates with the water bath through the temperature control component to control the temperature inside the water bath.

[0010] A data acquisition system, connected to the compressor and the soil sample, is used to collect pressure data of the gas inside the compressor and temperature data of the soil sample.

[0011] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein the compression component includes a piston tank and a gas storage tank, the CO2 gas cylinder is connected to the piston tank, a servo pump is connected to the piston tank, the CO2 gas delivered to the piston tank is compressed by the servo pump, and the compressed CO2 gas is injected into the gas storage tank, and the gas storage tank is connected to the soil sample through a pipeline.

[0012] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein the temperature control component includes a water bath tank, the water bath tank is connected to the water bath box, and a water bath liquid circulates between the water bath tank and the water bath box.

[0013] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein the data acquisition system includes a pressure sensor, a data acquisition unit, a computer, and several temperature sensors;

[0014] The pressure sensor is connected to the pipeline and is used to detect the pressure inside the pipeline;

[0015] The top of the reactor body is provided with several temperature sensor interfaces along the circumference, and the detection ends of the several temperature sensors are respectively inserted into the soil sample through the several temperature sensor interfaces.

[0016] The pressure sensor and several of the temperature sensors are respectively connected to the computer via the data acquisition unit.

[0017] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein a top cover is provided at the top of the reaction vessel body, the temperature sensor interface is located on the top cover, and the top cover is detachably connected to the reaction vessel body by a number of airtight screws.

[0018] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein a sealing rubber ring is provided between the top cover and the reaction vessel body, and the sealing rubber ring is fixedly connected to the top cover.

[0019] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein an injection pipe is provided in the middle of the top cover, the bottom end of the injection pipe extends into the soil sample, and the top end of the injection pipe is connected to the pipe.

[0020] According to the present invention, a carbon dioxide deep burial formation sealing test device is provided, wherein the water bath solution is an aqueous solution of ethylene glycol.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] This invention provides a carbon dioxide deep-buried stratum sequestration test device. The reactor cavity uses a static pressure method to compress soil samples. After compression, an internal cavity is formed. Carbon dioxide gas from a CO2 cylinder is transported to a compressor, compressed, and then transported to the soil sample 16 within the reactor. Simultaneously, a temperature control device connects to a water bath to control the temperature within the water bath. During the test, a data acquisition system collects the gas pressure and the temperature within the soil sample. This application simulates the reuse of energy soil extraction wells and their auxiliary equipment, significantly reducing the cost of carbon dioxide sequestration. It sequesters carbon dioxide in waste energy soil by generating hydrates. Compared to gaseous sequestration, solid-state dihydrated carbon dioxide is more stable, effectively reducing the risk of leakage. The detection method for carbon dioxide sequestration effectiveness is simple; only the change in phase equilibrium temperature and pressure is needed to indicate no leakage. Using phase equilibrium pressure to achieve solid hydrate sequestration of carbon dioxide is simpler and more efficient than existing ultra-high pressure carbon sequestration technologies. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the reactor body structure of this utility model;

[0026] Figure 3 This is a temperature-pressure data graph for this utility model;

[0027] The components include: 1. Reactor body; 2. CO2 cylinder; 3. Water bath; 4. Piston tank; 5. Gas storage tank; 6. Servo pump; 7. Water bath; 8. Pressure sensor; 9. Data acquisition unit; 10. Computer; 11. Temperature sensor; 12. Top cover; 13. Airtight screw; 14. Sealing rubber ring; 15. Gas injection pipe; and 16. Soil sample. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Carbon dioxide deep-buried formation sequestration technology, as a core component of this technology, has significant engineering implications and broad application prospects. Furthermore, the selection of the sequestration formation is crucial. An ideal sequestration formation should possess good stability, sealing properties, and suitable storage conditions. Many energy reservoirs are abandoned after extraction; these abandoned reservoirs often possess good sealing properties and natural gas storage conditions. Rational utilization of these abandoned reservoirs can not only achieve carbon dioxide sequestration but also reduce negative environmental impacts and improve resource utilization efficiency.

[0031] Carbon dioxide hydrate is a solid crystalline compound formed by the combination of carbon dioxide gas and water under low temperature and high pressure conditions. During the sequestration process, when carbon dioxide gas is injected into the sequestrated soil layer, if the temperature and pressure conditions are suitable, the carbon dioxide gas will combine with water in the reservoir to form carbon dioxide hydrate, achieving an effective sequestration effect. These hydrates exhibit good stability at deep underground depths, eliminating concerns about leakage and dissipation. Based on the above-mentioned information, this application provides the following solution:

[0032] Reference Figures 1-3 This utility model provides a test device for deep underground carbon dioxide storage, comprising:

[0033] The reaction vessel body 1 contains a soil sample 16.

[0034] The gas supply system includes a CO2 cylinder 2 and a compressor. The CO2 gas in the CO2 cylinder 2 is delivered to the soil sample 16 inside the reactor body 1 through the compressor.

[0035] The temperature control system includes a water bath 3 and a temperature control component. The reactor body 1 is fixedly connected inside the water bath 3 and is connected to the water bath 3 through the temperature control component to control the temperature inside the water bath 3.

[0036] The data acquisition system is connected to the compressor and the soil sample 16 to collect the pressure data of the gas inside the compressor and the temperature data inside the soil sample 16.

[0037] In one embodiment of this utility model, the soil sample 16 is pressed by static pressure in the inner cavity of the reactor body 1. After pressing, there is an inner cavity. Carbon dioxide gas from CO2 cylinder 2 is transported to the compressor and compressed by the compressor before being transported to the soil sample 16 in the reactor body 1. At the same time, it is connected to the water bath 3 through the temperature control component to control the temperature in the water bath 3. During the test, the gas pressure and the temperature in the soil sample 16 are collected by the set data acquisition system.

[0038] Specifically, soil sample 16 contains water, which is used to combine with carbon dioxide to form carbon dioxide hydrate.

[0039] As an optional implementation, the compression component includes a piston tank 4 and a gas storage tank 5. The CO2 cylinder 2 is connected to the piston tank 4. A servo pump 6 is connected to the piston tank 4. The CO2 gas delivered to the piston tank 4 is compressed by the servo pump 6, and the compressed CO2 gas is injected into the gas storage tank 5. The gas storage tank 5 is connected to the soil sample 16 through a pipeline.

[0040] In one embodiment of this utility model, carbon dioxide is injected into the piston tank 4 from the CO2 cylinder 2, and the gas is slowly compressed and injected into the gas storage tank 5 to the target pressure value using the servo pump 6. Then, the gas storage tank 5 is connected to the reaction vessel 1 so that the gas in the cavity of the reaction vessel 1 reaches a suitable pressure range. Horizontal valves are installed between each gas delivery pipeline to control the connection.

[0041] As an optional implementation, the temperature control device includes a water bath 7, which is connected to a water bath tank 3, and a water bath liquid circulates between the water bath 7 and the water bath tank 3.

[0042] In one embodiment of this utility model, the water bath 7 controls the temperature of the water bath liquid and injects it into the drain pipe of the water bath tank 3 through a circulation pump to achieve the purpose of temperature control.

[0043] As an optional implementation, the data acquisition system includes a pressure sensor 8, a data acquisition unit 9, a computer 10, and several temperature sensors 11;

[0044] Pressure sensor 8 is connected to the pipeline and is used to detect the pressure inside the pipeline;

[0045] Several temperature sensor interfaces are provided around the top of the reactor body 1. The detection ends of several temperature sensors 11 are respectively inserted into the soil sample 16 through several temperature sensor interfaces.

[0046] Pressure sensor 8 and several temperature sensors 11 are connected to computer 10 via data acquisition unit 9.

[0047] In one embodiment of this utility model, the pressure sensor 8 is used to detect the pressure inside the pipeline, and several temperature sensors 11 are inserted into the soil sample 16 to detect the temperature. The detected data is transmitted to the data acquisition unit 9 and then to the computer 10. The aforementioned sensors and data acquisition technologies are existing technologies and will not be described in detail here.

[0048] As an optional implementation, a top cover 12 is provided at the top of the reactor body 1, and the temperature sensor interface is located on the top cover 12. The top cover 12 is detachably connected to the reactor body 1 by several airtight screws 13.

[0049] In one embodiment of this utility model, the top cover 12 is detachably connected to the reactor body 1 by a number of airtight screws 13, which facilitates installation and disassembly while ensuring sealing.

[0050] As an optional implementation, a sealing rubber ring 14 is provided between the top cover 12 and the reactor body 1, and the sealing rubber ring 14 is fixedly connected to the top cover 12.

[0051] In one embodiment of this utility model, the airtightness of the reactor body 1 is ensured by the sealing rubber ring 14.

[0052] Specifically, a groove is provided between the reactor body 1 and the top cover 12, and a sealing rubber ring 14 is embedded in the groove to further improve the airtightness of the reactor body 1.

[0053] As an optional implementation, an air injection pipe 15 is provided in the middle of the top cover 12, the bottom end of the air injection pipe 15 extends into the soil sample 16, and the top end of the air injection pipe 15 is connected to the pipe.

[0054] In one embodiment of this utility model, the gas injection pipe 15 is located in the middle of a plurality of temperature sensors 11.

[0055] As an optional implementation method, the water bath solution is an aqueous solution of ethylene glycol.

[0056] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A device for testing carbon dioxide sequestration in a deep formation, characterized by, The utility model relates to a kind of soil CO2 injection system, including: Reaction kettle body (1), inside is provided with soil sample (16); Gas supply system, including CO2 gas cylinder (2) and compression part, CO2 gas in the CO2 gas cylinder (2) is sent to the soil sample (16) in the reaction kettle body (1) by the compression part; Temperature control system, including water bath box (3) and temperature control part, the reaction kettle body (1) is fixedly connected in the water bath box (3), is communicated with the water bath box (3) by the temperature control part, for controlling the temperature in the water bath box (3); Data acquisition system is connected with the compression part, the soil sample (16), for acquiring the pressure data of gas in the compression part and the temperature data in the soil sample (16).

2. The apparatus for testing the carbon dioxide deep formation storage according to claim 1, wherein: The compression part includes piston tank body (4) and gas storage tank body (5), the CO2 gas cylinder (2) is communicated with the piston tank body (4), the piston tank body (4) is connected with servo pump (6), the CO2 gas sent to the piston tank body (4) is compressed by the servo pump (6), and the compressed CO2 gas is injected into the gas storage tank body (5), the gas storage tank body (5) is communicated with the soil sample (16) by pipeline.

3. The apparatus for testing the carbon dioxide deep formation storage according to claim 1, wherein: The temperature control part includes water bath tank (7), the water bath tank (7) is communicated with the water bath box (3), and water bath liquid is circulated between the water bath tank (7) and the water bath box (3).

4. The apparatus for testing the carbon dioxide deep formation storage according to claim 2, wherein: The data acquisition system includes pressure sensor (8), data collector (9), computer (10) and several temperature sensors (11); The pressure sensor (8) is connected with the pipeline, for detecting the pressure in the pipeline; The top end of the reaction kettle body (1) is provided with several temperature sensor interfaces along the circumference, and the detection ends of several temperature sensors (11) respectively extend into the soil sample (16) through several temperature sensor interfaces; The pressure sensor (8), several temperature sensors (11) are connected with the computer (10) respectively through the data collector (9).

5. A device for testing the sealing of carbon dioxide in deep geological formations according to claim 4, characterized in that: The top end of the reaction kettle body (1) is provided with top cover (12), the temperature sensor interface is located on the top cover (12), and the top cover (12) is detachably connected with the reaction kettle body (1) by several airtight screws (13).

6. A device for testing the sealing of carbon dioxide in deep geological formations according to claim 5, characterized in that: Sealing rubber ring (14) is arranged between the top cover (12) and the reaction kettle body (1), and the sealing rubber ring (14) is fixedly connected on the top cover (12).

7. The apparatus for testing the carbon dioxide deep formation storage according to claim 5, wherein: Gas injection pipeline (15) is arranged in the middle of the top cover (12), the bottom end of the gas injection pipeline (15) extends into the soil sample (16), and the top end of the gas injection pipeline (15) is communicated with the pipeline.

8. The apparatus for testing the carbon dioxide deep formation storage according to claim 3, wherein: The water bath liquid is ethylene glycol aqueous solution.

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