Carbon dioxide-water-rock dynamic coupling simulation device and simulation method in geological storage process

Abstract

The invention relates to a carbon dioxide-water-rock dynamic coupling simulation device and method in a geological storage process. The device disclosed by the invention has high-precision temperature and pressure control capability, can accurately simulate various complex geological and engineering environmental conditions, provides a high-precision data basis for research on dynamic migration and transformation of carbon dioxide, and is beneficial to deeply revealing internal laws and mechanisms of the carbon dioxide. According to the device, a mixed solution of liquid carbon dioxide and formation water is adopted and injected from the cross section of the rock core, differential reaction generated in the rock under the condition of continuous carbon dioxide filling can be revealed, and powerful data support is provided for deeply knowing the dynamic behavior of carbon dioxide and interaction between the carbon dioxide and surrounding media.

Description

Technical Field

[0001] The present invention relates to the technical field of geological storage of carbon dioxide, and in particular to a device and method for simulating the dynamic coupling of carbon dioxide, water and rock in a geological storage process. Background Art

[0002] During the implementation of the CO2 geological storage project, CO2 is continuously injected into the geological structure below the surface or the seabed to achieve permanent storage. There are two very important factors for CO2 geological storage: the effectiveness of storage and the safety of storage. The CO2-water-rock interaction mechanism is an important research content for the effectiveness and safety of storage. Specifically, the CO2-water-rock interaction is the chemical field that converts gaseous CO2 into carbonate precipitation, which is the most important mechanism for determining the long-term storage of CO2. The CO2-water-rock interaction will change the mineral composition and physical properties of the reservoir rock, thereby changing the porosity and permeability of the reservoir, and ultimately affecting the CO2 storage effect. At the same time, the CO2-water-rock reaction study can reveal the laws of mineral dissolution and the generation of new minerals in formation water, determine the reaction rate, and establish a reaction kinetic model, providing a theoretical basis for studying the storage of CO2 from the site scale and providing support for the study of storage efficiency. In addition, CO2 often invades the cap rock through different mechanisms, which will change the physical and chemical properties of the cap rock, reduce the rock strength of the reservoir cap rock, and thus promote the leakage of CO2. In summary, simulating the carbon dioxide filling process in rocks under formation temperature and pressure conditions can effectively carry out research on the mechanism of carbon dioxide-water-rock interaction and reveal the dynamic migration and transformation laws of carbon dioxide.

[0003] At present, in the field of carbon dioxide geological storage, reactors are mostly used to study the mechanism of carbon dioxide-water-rock interaction. The basic principle is: put rock powder or block core into a reactor containing formation water solution, and measure the changes of rock powder or block core and formation water by continuously filling with carbon dioxide under certain temperature and pressure conditions. This experimental method is better suitable for debris and powdered rock samples. For block rocks, chemical reactions only occur on the surface of the rock, and cannot reveal the differential reactions produced inside the rock under the condition of continuous carbon dioxide filling. In addition, the existing experimental equipment has deficiencies in temperature and pressure control accuracy, as well as the material and functional integrity of the reaction vessel, and cannot meet the needs of high-precision and wide-range experiments. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a carbon dioxide-water-rock dynamic coupling simulation device for geological storage, including a core holder for placing a core sample to be tested;

[0005] Also included is a first pressure-generating injection system for simulating a carbon dioxide injection process in a high-pressure environment in a deep formation and injecting liquid carbon dioxide into a core holder;

[0006] A second pressure injection system for synchronously simulating the formation water injection process in a high-pressure environment of a deep formation and injecting water into the core holder;

[0007] The gas-liquid separator is used to receive the gas-liquid mixture from the core holder during the experiment, separate the gas phase and the liquid phase products, and measure the separated gas and liquid.

[0008] On the basis of the above scheme, the device also includes a back pressure control system arranged between the core holder and the gas-liquid separator for controlling the back pressure of the simulation device to simulate different pressure boundary conditions.

[0009] Based on the above scheme, a fluid preheater is arranged between the first pressure-building injection system, the second pressure-building injection system and the core holder for mixing and dissolving liquid carbon dioxide and water while controlling the temperature of the mixed fluid of liquid carbon dioxide and water entering the core holder.

[0010] Based on the above solution, the device also includes a carbon dioxide liquefaction unit for providing liquid carbon dioxide to the first pressure-generating injection system.

[0011] On the basis of the above solution, a condenser for cooling the fluid flowing out of the core holder is arranged between the core holder and the back pressure control system.

[0012] Based on the above solution, the core holder is provided with a heating system for controlling the temperature inside the core holder.

[0013] On the basis of the above solution, the core holder is provided with a confining pressure tracking pump for real-time tracking and maintaining the stability of the confining pressure in the core holder to effectively simulate the actual underground pressure environment.

[0014] On the basis of the above scheme, a sampler for obtaining liquid samples in real time is provided at the liquid outlet of the gas-liquid separator, and the gas phase separated by the gas-liquid separator is measured and analyzed by an automatic gas meter.

[0015] The present application also provides a method for simulating the dynamic coupling of carbon dioxide, water and rock in a geological storage process, comprising the following steps:

[0016] S1 places the core sample to be tested in the core holder; according to the experimental requirements, the core holder is heated to the set temperature through the heating system; the confining pressure tracking pump in the core holder works synchronously to maintain the confining pressure stable at the set value;

[0017] The S2 carbon dioxide liquefaction unit provides liquid carbon dioxide according to the experimental needs, and uses the first pressure injection system to inject the liquid carbon dioxide into the fluid preheater at a predetermined flow rate and pressure; at the same time, uses the second pressure injection system to inject simulated formation water into the fluid preheater at a predetermined flow rate and pressure; in the fluid preheater, the carbon dioxide and formation water are dissolved and mixed, and the temperature is controlled to rise to the set temperature;

[0018] S3 uses the pressure provided by the first pressure injection system and the second pressure injection system to inject the mixed liquid of carbon dioxide and water in the fluid preheater into the core holder. During the injection, the liquid is injected into the core sample from the cross section of the core sample.

[0019] S4 is controlled by the back pressure control system. The mixed liquid injected into the core holder passes through the core sample and then enters the condenser. After that, the generated gas-liquid mixture enters the gas-liquid separator for separation. The separated liquid phase is sampled by the sampler, and the separated gas phase is measured and analyzed by the automatic gas meter.

[0020] Beneficial effects of the present invention:

[0021] The device of the present invention has high-precision temperature and pressure control capabilities, can accurately simulate a variety of complex geological and engineering environmental conditions, provide a highly accurate data basis for the dynamic migration and transformation of carbon dioxide, and help to deeply reveal its internal laws and mechanisms.

[0022] The device of the present invention integrates the carbon dioxide liquefaction unit, gas-liquid separator, sampler and liquid permeability measurement functions, making the device fully functional, capable of real-time monitoring and analysis of various parameters of carbon dioxide during migration and conversion, and comprehensive acquisition of key information in the experimental process, greatly improving the efficiency and depth of experimental research, and providing a powerful tool support for research and application in carbon dioxide related fields. In particular, the back pressure controlled by the back pressure control system in the device simulates different pressure boundary conditions, and works in conjunction with the pressure generation, injection system and confining pressure tracking pump to construct a more realistic and complex pressure environment, which is helpful for in-depth research on the migration and conversion laws of carbon dioxide under different pressure conditions, and further reflects the integrity characteristics of the device of the present invention.

[0023] The device of the present invention uses a mixed solution of liquid carbon dioxide and formation water, which is injected from the cross section of the core, and can reveal the differential reactions produced inside the rock under the conditions of continuous carbon dioxide injection, providing strong data support for in-depth understanding of the dynamic behavior of carbon dioxide and its interaction with the surrounding medium.

[0024] The device of the present invention has the function of continuous injection of multiple fluids and gases under the simulated formation temperature and pressure environment, realizes the steady-state injection of carbon dioxide and formation water in the columnar core, and can realize real-time fluid sampling to deeply understand the dynamic behavior of carbon dioxide and its interaction with the surrounding medium, including the reaction characteristics of different core positions (front end, middle end, and rear end), the changes in the ion content and type of the fluid, etc., to study the dynamic migration and transformation laws of carbon dioxide.

[0025] The device of the present invention uses liquid carbon dioxide during simulation, which is more in line with the actual situation of carbon dioxide geological storage projects. Under high pressure, gaseous carbon dioxide is very easy to change its phase, and there is a large error in the measurement of the amount of gas injected. Therefore, the device of the present invention uses a carbon dioxide liquefaction unit to provide the liquid carbon dioxide required for simulation, and injects the liquid carbon dioxide into the fluid preheater at a predetermined flow rate through a pressure injection system, which can accurately control the amount of carbon dioxide injected, ensure the accuracy of the experimental results, and reduce errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0027] Figure 2 This is an electron microscope image of a core thin section at the rear end of the core before carbon dioxide and formation water pass through the core sample;

[0028] Figure 3 This is an electron microscope image of a core thin section at the rear end of the core after carbon dioxide and formation water pass through the core sample;

[0029] Figure 4 This is an electron microscope image of a core thin section at the front end of the core after carbon dioxide and formation water pass through the core sample;

[0030] Figure 5 This is an electron microscope image of a thin slice of the core at the middle of the core after carbon dioxide and formation water have passed through the core sample;

[0031] Figure 6 for Figure 5 Energy spectrum of the mineral marked with a dot in the middle. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0033] Example 1

[0034] like Figure 1As shown, the present invention provides a device for simulating the dynamic coupling of carbon dioxide, water and rock in the process of geological storage, the device comprising a core holder 1 for placing a core sample to be tested; the core holder 1 can be made of a general Hastelloy HC276 material, can accommodate core samples of a certain size range (sample size is φ25×(25-100) mm), has a temperature resistance of 180°C, acid and alkali corrosion resistance, and a pressure resistance of 50 MPa, so that the core sample remains stable under high temperature, high pressure and acid and alkali environment, provides reliable experimental conditions for the study of the interaction between carbon dioxide and the core sample, and ensures the reliability and repeatability of the experimental results.

[0035] It also includes a first pressure injection system 2 for simulating the carbon dioxide injection process under high pressure environment in deep formations and injecting liquid carbon dioxide into the core holder 1;

[0036] The second pressure-generating injection system 3 is used for synchronously simulating the formation water injection process under the high-pressure environment of the deep formation and injecting water into the core holder 1; the water in the present invention refers to simulated formation water.

[0037] The gas-liquid separator 4 is used for receiving the gas-liquid mixture from the core holder 1 during the experiment, and separating the gas phase and liquid phase products to measure the separated gas and liquid respectively.

[0038] The core holder 1 is provided with a heating system 9 for controlling the temperature inside the core holder 1. Specifically, the heating system 9 has a temperature rise range from room temperature to 200°C, a temperature control accuracy of up to 0.1°C, and a heating rate of up to 1.5°C / min. It can accurately and quickly heat the experimental system to the required temperature to meet the temperature requirements of different experiments. At the same time, the core holder 1 can be equipped with two thermocouples with a range of 0-300°C and a test accuracy of 0.1°C, which can accurately monitor the internal temperature of the holder in real time, ensure the precise control and monitoring of the experimental temperature, and provide reliable temperature data support for the experiment.

[0039] The first pressure-building injection system 2 and the second pressure-building injection system 3 can use a double-cylinder injection pump, and the injection pressure can reach 70 MPa.

[0040] Among them, the first pressure injection system 2 can provide a sufficiently high pressure to simulate the injection process of carbon dioxide in a high-pressure environment such as deep formations. The second pressure injection system 3 can inject formation water in the piston container 3-1; the controllable injection flow rate range is 0.0001ml / min-30ml / min, and the accuracy error is less than 1%. The injection rate of carbon dioxide and formation water can be accurately controlled to meet various experimental scenarios from extremely low flow rates to higher flow rates, so as to study the migration and reaction characteristics of carbon dioxide at different flow rates.

[0041] The core holder 1 can also be equipped with a confining pressure tracking pump 10, which has an operating pressure of up to 70 MPa and a constant pressure accuracy of 0.1 MPa. It can track and maintain the stability of the confining pressure in real time, ensure the consistency and stability of the pressure environment during the experiment, and effectively simulate the actual underground pressure environment.

[0042] As a specific implementation scheme, the gas-liquid separator 4 can be made of universal Hastelloy HC276 material with a volume of 200 ml, which can effectively separate the carbon dioxide gas-liquid mixture generated during the experiment, facilitate the analysis and study of the gas and liquid products respectively, accurately obtain the phase change information of carbon dioxide during the migration and conversion process, and provide strong support for the analysis of experimental results.

[0043] As a specific implementation scheme, the simulation device also includes a back pressure control system 5 arranged between the core holder 1 and the gas-liquid separator 4 for controlling the back pressure of the simulation device to simulate different pressure boundary conditions. Specifically, the maximum working pressure of the back pressure control system 5 is 70MPa, and the control accuracy is 0.1MPa. It can accurately control the back pressure of the experimental system, simulate different pressure boundary conditions, and work together with the pressure generation, injection system and confining pressure tracking pump to build a more realistic and complex pressure environment, which is helpful for in-depth research on the migration and transformation of carbon dioxide under different pressure conditions. Specifically, the function of the pressure generation and injection system is to accurately inject various fluids into the core sample and apply fluid injection pressure at the entrance of the core holder 1. The confining pressure tracking pump 10 is responsible for applying confining pressure to the core holder 1. It has two functions: one is to provide a constant confining pressure for the core sample to simulate the stress state of the formation; the other is to achieve tracking pressure change and keep the confining pressure greater than the fluid injection pressure. Both functions ensure that the confining pressure of the core holder is greater than the fluid injection pressure, prevent the injected fluid from migrating from the gap between the core sample and the holder, and ensure that the injected fluid passes through the sample only from the cross section of the core. The back pressure control system 5 has a unique mechanism that only allows fluids with pressures higher than the set value to flow out, thereby effectively establishing formation fluid pressure. These three systems do not operate independently, but work closely together and cooperate with each other, which can highly restore the original environmental conditions of the core in the formation, significantly improve the accuracy and reliability of the experiment, and accurately simulate the dynamic reaction process between carbon dioxide and various media such as formation water and rock after carbon dioxide is injected during the geological storage of carbon dioxide.

[0044] You can use the confining pressure tracking pump and back pressure (back pressure) control system produced by Jiangsu Tuochuang Scientific Research Instrument Co., Ltd. The confining pressure tracking pump model: TC-100; specifications: single pump type, working pressure: 70MPa, single cylinder volume: 100ml, flow range: 0.001~40ml / min. The back pressure (back pressure) control system model: BY-70, interface φ3, maximum working pressure 70MPa, wetted material 316L, pressure control accuracy 0.1MPa.

[0045] As a specific implementation scheme, a fluid preheater 6 is provided between the first pressure-building injection system 2 and the second pressure-building injection system 3 and the core holder 1 for mixing and dissolving liquid carbon dioxide and water and controlling the temperature of the mixed fluid of liquid carbon dioxide and water entering the core holder 1. Specifically, the fluid preheater 6 is made of Hastelloy HC276, has a preheating electric heating device, and is equipped with a temperature-controlling thermocouple, with a temperature control accuracy of 0.5°C, a heating rate of up to 1.5°C / min, and a heating temperature range of room temperature to 180°C, which can further ensure the uniformity and stability of the temperature of the mixed liquid of liquid carbon dioxide and formation water in the fluid preheater 6, reduce the influence of temperature gradient on the experimental results, and make the reaction process of carbon dioxide closer to the actual situation.

[0046] As a specific embodiment, the simulation device further includes a carbon dioxide liquefaction unit 7 for providing liquid carbon dioxide to the first pressure injection system 2. Specifically, the carbon dioxide liquefaction unit 7 can realize the continuous preparation of carbon dioxide liquid, provide a stable source of liquid carbon dioxide for the experiment, facilitate the study of carbon dioxide conversion, migration and reaction characteristics, and broaden the scope of experimental research.

[0047] After the gas-liquid separator 4 separates the gas phase and the liquid phase products, the gas can be measured and analyzed by the automatic gas meter 12; the liquid can be sampled by the sampler 11 and weighed by the electronic balance 13. The sampler 11 can realize the sampling and measurement of the fluid at any time, and can obtain fluid samples in time at different stages during the experiment, which is convenient for real-time monitoring and analysis of the concentration and composition of carbon dioxide and other related substances, which helps to deeply understand the dynamic migration and transformation process of carbon dioxide, and timely grasp the experimental progress and result change trend.

[0048] Specifically, the automatic gas meter 12 can adopt an automated exhaust and gas collection method to measure the gas volume according to the movement stroke caused by the pressure change during the intake process. It can continuously and uninterruptedly measure the gas volume at the holder outlet and transmit it to the computer software for recording and storage through the communication port; the measuring range is 0-2L / min, the accuracy is 0.1%, the working pressure is 0~1KPa, and the control system: PLC control automatic reversing.

[0049] As a specific implementation scheme, a condenser 8 for cooling the fluid flowing out of the core holder 1 is arranged between the core holder 1 and the back pressure control system 5. The condenser 8 can be made of general Hastelloy HC276.

[0050] Example 2

[0051] Based on the simulation device in the embodiment, the present application provides a method for dynamic coupling simulation of carbon dioxide-water-rock in geological storage process, the method comprising the following steps:

[0052] S1 places the core sample to be tested in the core holder 1 to ensure good sealing; according to the experimental requirements, the core holder 1 is heated to the set temperature through the heating system 9. During the heating process, the temperature is monitored in real time by the thermocouple and accurately controlled by the temperature control system to ensure that the temperature reaches the accuracy range required by the experiment. The confining pressure tracking pump 10 in the core holder 1 works synchronously to maintain the confining pressure stable at the set value. The thermocouple and temperature control system are no longer shown in the figure.

[0053] The S2 carbon dioxide liquefaction unit 7 provides liquid carbon dioxide according to experimental needs, and uses the first pressure-generating injection system 2 to inject the liquid carbon dioxide into the fluid preheater 6 at a predetermined flow rate and pressure; at the same time, the second pressure-generating injection system 3 is used to inject the simulated formation water in the piston container 3-1 into the fluid preheater 6 at a predetermined flow rate and pressure; the carbon dioxide and formation water are dissolved and mixed in the fluid preheater 6, and the temperature is controlled to rise to the set temperature.

[0054] S3 uses the pressure provided by the first pressure injection system 2 and the second pressure injection system 3 to inject the mixed liquid of carbon dioxide and water in the fluid preheater 6 into the core holder 1. During the injection, the liquid is injected into the core sample from the cross section of the core sample, so that the mixed solution of carbon dioxide and formation water further interacts with the core sample;

[0055] S4 is controlled by the back pressure control system 5. The mixed liquid injected into the core clamp 1 enters the condenser 8 after passing through the core sample. The generated gas-liquid mixture enters the gas-liquid separator 4 through the pipeline for separation. The separated liquid phase is sampled by the sampler 11, and the separated gas phase is measured by the automatic gas meter 12 for analysis.

[0056] The core holder 1 has a liquid permeability measurement function. Through the liquid permeability measurement function of the core holder 1, the permeability change of the liquid in the core can be measured, so as to indirectly obtain the migration of carbon dioxide in the core and the pore structure information. Combined with other measurement data, the dynamic migration and transformation process of carbon dioxide under different conditions is comprehensively and deeply studied, providing accurate and reliable experimental data and theoretical support for scientific research and engineering applications in related fields.

[0057] Example 3

[0058] Based on the simulation device in Example 1 and the simulation method in Example 2, this application provides a case of dynamic coupling simulation of carbon dioxide-water-rock in the geological storage process, specifically studying the characteristics of the interaction between carbon dioxide-formation water-rock after carbon dioxide injection, and the method is as follows:

[0059] S1 places the core sample to be tested (sandstone core sample with a diameter of 2.5 cm and a length of 5 cm) in the core holder 1; according to the experimental requirements, the core holder 1 is heated to a set temperature of 53°C through the heating system 9; the confining pressure tracking pump 10 in the core holder 1 works synchronously to maintain the confining pressure stable at 15 MPa;

[0060] The S2 carbon dioxide liquefaction unit 7 provides liquid carbon dioxide according to the experimental needs, and uses the first pressure injection system (2) to inject the liquid carbon dioxide into the fluid preheater 6 at a flow rate of 5 ml / min; at the same time, uses the second pressure injection system (3) to inject simulated formation water into the fluid preheater 6 at a flow rate of 5 ml / min; the carbon dioxide and formation water are dissolved and mixed in the fluid preheater 6, and the temperature is controlled to rise to 53°C;

[0061] S3 uses the pressure provided by the first pressure injection system 2 and the second pressure injection system 3 to inject the mixed liquid of carbon dioxide and water in the fluid preheater 6 into the core holder 1. During the injection, the liquid is injected into the core sample from the cross section of the core sample;

[0062] S4 is controlled by the back pressure control system 5, and the outlet pressure is set to 10Mpa. The mixed liquid injected into the core clamp 1 enters the condenser 8 after passing through the core sample; then, the generated gas-liquid mixture enters the gas-liquid separator 4 for separation, the separated liquid phase is sampled by the sampler 11, and the separated gas phase is measured and analyzed by the automatic gas meter 12.

[0063] When CO2 passes through the core sample, it is identified by core thin sections ( Figure 2-Figure 5 ), it can be found that the carbon dioxide-water-rock interaction changes the mineral composition and physical properties of the rock. Obvious dissolution pores can be seen at the rear end of the core ( Figure 3 ), the formation of new minerals was found at the front end of the core ( Figure 4 ); In the middle of the core, through the analysis of rock mineral composition, it was found that the initial minerals were feldspar, and the newly generated minerals containing iron, magnesium and calcium ( Figure 5 and Figure 6). The above results confirm that there are obvious changes in the mineral content in the formation water, characterizing the dynamic coupling reaction process between carbon dioxide, formation water and core. Based on the above experiments, the reaction rate of mineral dissolution or production can be further determined, providing data support for the establishment of reaction kinetic models and providing a scientific basis for revealing the dynamic coupling mechanism of carbon dioxide-water-rock.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for simulating the dynamic coupling of carbon dioxide, water and rock in the process of geological storage, characterized in that: It comprises a core holder (1) for placing a core sample to be tested; It also includes a first pressure injection system (2) for simulating a carbon dioxide injection process in a high-pressure environment in a deep formation and injecting liquid carbon dioxide into the core holder (1); A second pressure-generating injection system (3) for synchronously simulating a formation water injection process under a high-pressure environment in a deep formation and injecting water into the core holder (1); A gas-liquid separator (4) is used to receive a gas-liquid mixture from a core holder (1) during an experiment, separate gas phase and liquid phase products, and measure the separated gas and liquid.

2. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 1, characterized in that: It also includes a back pressure control system (5) disposed between the core holder (1) and the gas-liquid separator (4) and used for controlling the back pressure of the simulation device to simulate different pressure boundary conditions.

3. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 1, characterized in that: A fluid preheater (6) is provided between the first pressure-building injection system (2), the second pressure-building injection system (3) and the core holder (1) for mixing and dissolving liquid carbon dioxide and water and controlling the temperature of the mixed fluid of liquid carbon dioxide and water entering the core holder (1).

4. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 1, characterized in that: It also includes a carbon dioxide liquefaction unit (7) for providing liquid carbon dioxide to the first pressure-generating injection system (2).

5. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 2, characterized in that: A condenser (8) for cooling the fluid flowing out of the core holder (1) is arranged between the core holder (1) and the back pressure control system (5).

6. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 1, characterized in that: The core holder (1) is provided with a heating system (9) for controlling the temperature inside the core holder (1).

7. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 1, characterized in that: The core holder (1) is provided with a confining pressure tracking pump (10) for real-time tracking and maintaining the stability of the confining pressure in the core holder (1) so as to effectively simulate the actual underground pressure environment.

8. The device for simulating the dynamic coupling of carbon dioxide, water and rock in the geological storage process according to claim 1, characterized in that: The liquid outlet end of the gas-liquid separator (4) is provided with a sampler (11) for obtaining liquid samples in real time, and the gas phase separated by the gas-liquid separator (4) is measured and analyzed by an automatic gas meter (12).

9. A method for simulating the dynamic coupling of carbon dioxide, water and rock in geological storage, characterized in that: Use the device according to any one of claims 1 to 8.

10. The method for dynamic coupling simulation of carbon dioxide-water-rock in geological storage process according to claim 9, characterized in that: The steps include: S1 places the core sample to be tested in the core holder (1); according to the experimental requirements, the core holder (1) is heated to a set temperature through the heating system (9); the confining pressure tracking pump (10) in the core holder (1) works synchronously to maintain the confining pressure stable at the set value; The S2 carbon dioxide liquefaction unit (7) provides liquid carbon dioxide according to experimental needs, and uses the first pressure injection system (2) to inject the liquid carbon dioxide into the fluid preheater (6) at a predetermined flow rate and pressure; at the same time, uses the second pressure injection system (3) to inject simulated formation water into the fluid preheater (6) at a predetermined flow rate and pressure; in the fluid preheater (6), the carbon dioxide and formation water are dissolved and mixed, and the temperature is controlled to rise to a set temperature; S3 uses the pressure provided by the first pressure injection system (2) and the second pressure injection system (3) to inject the mixed liquid of carbon dioxide and water in the fluid preheater (6) into the core holder (1). During the injection, the liquid is injected into the core sample from the cross section of the core sample; S4 is controlled by a back pressure control system (5), and the mixed liquid injected into the core holder (1) passes through the core sample and enters the condenser (8); thereafter, the generated gas-liquid mixture enters the gas-liquid separator (4) for separation, the separated liquid phase is sampled by a sampler (11), and the separated gas phase is measured and analyzed by an automatic gas meter (12).

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