Visual high-temperature and high-pressure carbon dioxide water-rock reaction device and method

Abstract

The invention belongs to the technical field of oil exploitation, and discloses a visual high-temperature and high-pressure carbon dioxide water-rock reaction device and method.The device comprises a filling assembly, an observation window, a density instrument, a microscope and a computer. By using the filling assembly, the constant-temperature heating layer and the reaction chamber, the reaction environments in different pressure states can be effectively simulated in the reaction chamber through the filling assembly, the reaction environments of the reaction chamber at different temperatures can be simulated through the constant-temperature heating layer, and equipment support is provided for the environment of high-temperature and high-pressure carbon dioxide water-rock reaction; the method provided by the invention can effectively simulate the reaction of carbon dioxide with reservoir rock and minerals at high temperature and high pressure, and observe the microstructure and mass change of the rock surface in the reaction process of carbon dioxide with rock and water at different temperatures and pressures; and data support is provided for the interaction rule of CO2-formation water-rock minerals under the formation condition in the actual production process.

Description

Technical Field

[0001] The invention belongs to the technical field of oil extraction, and in particular relates to a visualized high-temperature and high-pressure carbon dioxide water-rock reaction device and method. Background Art

[0002] At present, with the growth of demand for oil and gas resources and the continuous deepening of exploration and development, unconventional oil and gas such as tight oil and shale oil have become an important part of increasing oil and gas reserves and production. The practice of unconventional oil and gas reservoir development has proved that CO2 injection development is a key technology for the effective development of unconventional reservoirs. It can not only achieve efficient development of such oil reservoirs but also bury CO2 geologically, achieving a win-win effect of improving oil recovery and reducing CO2 emissions. However, a large number of studies have shown that CO2 gas is extremely active. After being injected into the reservoir, it is very easy to undergo a series of complex physical and chemical reactions with reservoir fluids and minerals, affecting the reservoir properties. Therefore, clarifying the interaction law of CO2-formation water-rock minerals under formation conditions is of great significance for CO2-EOR in tight reservoirs and the storage of CO2 in tight reservoirs.

[0003] However, the current CO2 water-rock reaction experiment is mainly carried out in a high-temperature and high-pressure reactor. Samples can only be taken out after the reaction under one temperature and pressure to test the relationship before and after the reaction. It is not possible to test the regularity of the reaction of the same sample under different high-temperature and high-pressure conditions. It is also impossible to monitor the dynamic dissolution process of the rock surface in real time during the reaction, and it is impossible to accurately monitor the dynamic changes of the reservoir rock and water during the entire reaction process. Therefore, it is urgent to establish a visual high-temperature and high-pressure carbon dioxide water-rock reaction device and method. Summary of the invention

[0004] In order to solve at least one problem in the background technology, the present invention proposes a visualized high-temperature and high-pressure carbon dioxide water-rock reaction device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device, comprising:

[0007] A filling assembly, provided with an injection pump, for injecting a reaction medium into the reaction chamber, wherein the reaction medium includes carbon dioxide and simulated formation water;

[0008] The reaction chamber is provided with a stirrer and a clamper, wherein the stirrer is located inside the reaction chamber and is used to stir the reaction medium, and the clamper extends from the outside to the inside of the reaction chamber and is used to clamp the reaction rock sample and adjust the horizontal height of the clamped rock sample in the reaction chamber;

[0009] An observation window is provided on a surface of the reaction chamber;

[0010] Density meter, used to detect the density value of the reaction medium;

[0011] A microscope, used to observe the morphology of the reaction rock sample through the observation window;

[0012] The computer is connected to the microscope and is used to obtain the morphology of the reaction rock sample observed by the microscope.

[0013] Preferably, the filling assembly further comprises a water storage kettle and a gas storage kettle;

[0014] The injection pump is connected to a first valve, and the first valve is connected to one end of the water storage kettle and one end of the gas storage kettle respectively;

[0015] The other end of the water storage kettle is connected to the reaction chamber through a pipeline;

[0016] The other end of the gas storage kettle is connected to the reaction chamber through a pipeline.

[0017] Preferably, a second valve is installed on the pipeline between the water storage kettle and the reaction chamber;

[0018] A third valve is installed on the pipeline between the gas storage kettle and the reaction chamber.

[0019] Preferably, a constant temperature heating layer is provided on the surface of the reaction chamber, and an observation port for an observation window is provided on the surface of the constant temperature heating layer.

[0020] Preferably, a pressure relief pipe is also installed on the reaction chamber, and a fourth valve is installed on the pressure relief pipe.

[0021] Preferably, the density meter comprises a monitoring probe and a body, the monitoring probe is located inside the reaction chamber, the body is located outside the reaction chamber, and the monitoring probe and the body are connected via a wire.

[0022] Preferably, the upper end of the clamp is located outside the reaction chamber, and the lower end extends to the inside of the reaction chamber, and the clamp is used to slide or rotate relative to the reaction chamber to control the horizontal height and orientation in the reaction chamber.

[0023] A visualized high-temperature and high-pressure carbon dioxide water-rock reaction method, used for the above-mentioned visualized high-temperature and high-pressure carbon dioxide water-rock reaction device, comprises the following steps:

[0024] The mass of the reaction rock sample is measured and then placed into the reaction chamber through the holder;

[0025] The reaction chamber is filled with several reaction media in sequence through the filling assembly, and the first condition is met;

[0026] The reaction medium is stirred by a stirrer.

[0027] The reaction rock sample is fully contacted with the reaction medium through the clamp, and the current water level of the reaction chamber is recorded, and the second condition is met;

[0028] Test the mass change of the reaction rock sample and the change of the water level height of the reaction chamber at different temperatures, or test the mass change of the reaction rock sample and the change of the water level height of the reaction chamber at different pressures, or test the surface morphology change of the reaction rock sample at different pressures.

[0029] Preferably, at different temperatures, the first condition is that the pressure of the reaction chamber is 30-70 MPa;

[0030] Under different pressures, the first condition is to set the surface temperature of the reaction chamber to 70 to 150 degrees Celsius.

[0031] Preferably, the second condition is that the clamping rod of the clamp cannot be immersed in water, and the microscope observes the reaction rock sample at all angles.

[0032] Beneficial effects of the present invention:

[0033] 1. The present invention uses a filling component, a constant temperature heating layer and a reaction chamber. The filling component can effectively simulate the reaction environment under different pressure states in the reaction chamber, and the constant temperature heating layer can simulate the reaction environment of the reaction chamber at different temperatures, thereby providing equipment support for the environment of high temperature and high pressure carbon dioxide water-rock reaction;

[0034] 2. The method of the present invention adopts a visualized high-temperature and high-pressure carbon dioxide water-rock reaction device, which can effectively simulate the reaction of carbon dioxide with reservoir rocks and minerals under high temperature and high pressure, and observe the microscopic morphology and mass changes of the rock surface during the reaction of carbon dioxide with rocks and water at different temperatures and pressures, which provides data support for the interaction law of CO2-formation water-rock minerals under formation conditions in the actual production process, and is conducive to monitoring the dynamic changes of reservoir rocks and water after the interaction during the entire reaction process.

[0035] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic structural diagram of a visualized high-temperature and high-pressure carbon dioxide water-rock reaction device of the present invention is shown;

[0038] Figure 2 A schematic diagram of the connection structure between the high-strength, high-temperature-resistant and corrosion-resistant glass and the reaction chamber of the present invention is shown;

[0039] Figure 3 A flow chart showing a visualized high-temperature and high-pressure carbon dioxide water-rock reaction method of the present invention is shown;

[0040] Figure 4 The surface microscopic morphology of the reaction rock sample before reaction in Experiment 3 is shown;

[0041] Figure 5 The surface microscopic morphology of the reaction rock sample in Experiment 3 at 10 MPa is shown;

[0042] Figure 6 The surface microscopic morphology of the reaction rock sample in Experiment 3 at 20 MPa is shown;

[0043] Figure 7 The surface microscopic morphology of the reaction rock sample in Experiment 3 at 30MPa is shown;

[0044] Figure 8 The surface microscopic morphology of the reaction rock sample in Experiment 3 at 40MPa is shown;

[0045] Fig. 9 The surface microstructure of the reaction rock sample in Experiment 3 at 50 MPa is shown.

[0046] In the figure: 1. injection pump; 2. first valve; 3. water storage kettle; 4. gas storage kettle; 5. second valve; 6. reaction chamber; 7. constant temperature heating layer; 8. agitator; 9. clamp; 10. observation window; 11. density meter; 12. microscope; 13. computer; 14. pressure relief pipe; 15. third valve; 16. fourth valve; 17. steel plate; 18. sealing ring; 19. bolt. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0048] A visual high-temperature and high-pressure carbon dioxide water-rock reaction device, such as Figure 1 As shown, it includes a filling component, a reaction chamber 6, an observation window 10, a density meter 11, a microscope 12 and a computer 13.

[0049] The filling assembly includes an injection pump 1, a water storage kettle 3 and a gas storage kettle 4. The injection pump 1 is connected to a first valve 2, which is respectively connected to one end of the water storage kettle 3 and one end of the gas storage kettle 4. The other end of the water storage kettle 3 is connected to the reaction chamber 6 through a pipeline, and the other end of the gas storage kettle 4 is connected to the reaction chamber 6 through a pipeline. In addition, a second valve 5 is installed on the pipeline between the water storage kettle 3 and the reaction chamber 6, and a third valve 15 is installed on the pipeline between the gas storage kettle 4 and the reaction chamber 6.

[0050] It should be noted that the injection well is used to inject the reaction medium into the reaction chamber 6, and the reaction medium includes carbon dioxide and simulated formation water. In addition, the first valve 2 in the injection assembly adopts a six-way valve, and the second valve 5 and the third valve 15 both adopt horizontal valves. During the injection process, the first valve 2 and the second valve 5 can be opened to inject simulated formation water into the reaction chamber 6, and the first valve 2 and the third valve 15 can also be opened to inject carbon dioxide into the reaction chamber 6.

[0051] The reaction chamber 6 is provided with an agitator 8 and a clamp 9, wherein the agitator 8 is located inside the reaction chamber 6 and is used to stir the reaction medium, and the clamp 9 extends from the outside to the inside of the reaction chamber 6 and is used to clamp the reaction rock sample and adjust the horizontal height of the clamped rock sample in the reaction chamber 6. Specifically, in the above structure, the upper end of the clamp 9 is located outside the reaction chamber 6, and the lower end extends into the reaction chamber 6, and the clamp 9 can slide relative to the reaction chamber 6 or rotate 360° to control the horizontal height and orientation of the reaction chamber 6.

[0052] The observation window 10 is provided on a surface of the reaction chamber 6 and is made of high-strength, high-temperature and corrosion-resistant glass. The glass can withstand a maximum pressure of 70 MPa and a maximum temperature of 150°C. At the same time, the interior of the reaction chamber 6 is coated with a high-temperature and corrosion-resistant layer to prevent corrosion. The interior dimensions of the reaction chamber 6 of the present invention are: 100×100×150 (mm), and the exterior dimensions are: 110×110×150 (mm). In addition, if Figure 2 As shown, the observation window 10 is embedded in the square steel plate 17 through a fluorine-containing rubber sealing ring 18 and fixed to the main frame of the reaction chamber 6 through bolts 19.

[0053] The density meter 11 is used to detect the density value of the reaction medium, and includes a monitoring probe and a body, wherein the monitoring probe is located inside the reaction chamber 6, and the body is located outside the reaction chamber 6, and the monitoring probe and the body are connected by a wire. During the density measurement process, the monitoring probe can detect the density information of the reaction medium, and then transmit it to the body through the wire.

[0054] The microscope 12 generally has a maximum observation magnification of 2000, and is used to observe the morphology of the reaction rock sample through the observation window 10 (mainly to observe microscopic morphological changes).

[0055] The computer 13 is connected to the microscope 12 to obtain the morphological information of the reaction rock sample obtained by the microscope 12 and obtain the before and after comparison pictures. For example, a camera can be installed at the eyepiece position of the microscope 12, and then the computer 13 obtains the pictures taken by the camera.

[0056] Furthermore, a constant temperature heating layer 7 is provided on the surface of the reaction chamber 6, and an observation port for an observation window 10 is provided on the surface of the constant temperature heating layer 7. The constant temperature heating layer 7 can adjust the temperature of the surface of the reaction chamber 6, thereby providing different reaction temperatures for the reaction medium and the reaction rock sample, or keeping the reaction temperature constant.

[0057] Furthermore, a pressure relief pipe 14 is installed on the reaction chamber 6, and a fourth valve 16 is installed on the pressure relief pipe 14. The pressure relief pipe 14 can discharge the simulated formation water and carbon dioxide in the reaction chamber 6, wherein the fourth valve 16 can also be a horizontal valve.

[0058] A visualized high-temperature and high-pressure carbon dioxide water-rock reaction method is used for the above-mentioned visualized high-temperature and high-pressure carbon dioxide water-rock reaction device, wherein the water used in the experiment is simulated formation water, the salinity is 21355 mg / L CaCl2 water type, and the reaction rock sample used in the experiment is the core of the oil reservoir, such as Figure 3 As shown, the following steps are included:

[0059] S1: Measure the mass of the reaction rock sample, and then place it into the reaction chamber 6 through the holder 9; specifically, use an electronic balance to measure the mass of the reaction rock sample before the reaction, and then place the reaction rock sample on the rock sample holder 9 and place it in the reaction chamber 6.

[0060] S2: Several reaction media are sequentially injected into the reaction chamber 6 through the injection assembly, and the first condition is met; specifically, simulated formation water is placed in the water storage kettle 3, carbon dioxide is placed in the gas storage kettle 4, the first valve 2 is opened to connect the water storage kettle 3 and the injection pump 1, and then the second valve 5 between the water storage kettle 3 and the reaction chamber 6 is opened, and then the injection pump 1 is started to inject the simulated formation water in the water storage kettle 3 into the reaction chamber 6 at a rate of 5 mL / min, and the injection volume is about 2 / 3 of the internal volume of the reaction chamber 6, and then the second valve 5 between the reaction chamber 6 and the water storage kettle 3 is closed, the first valve 2 connected between the water storage kettle 3 and the injection pump 1 is closed, the third valve 15 between the gas storage kettle 4 and the reaction chamber 6 is opened, and the first valve 2 connected between the gas storage kettle 4 and the injection pump 1 is opened, so as to inject carbon dioxide into the reaction chamber 6, and the gas injection is stopped when the pressure in the reaction chamber 6 is 30-40 MPa, the injection pump 1 is closed, and the first valve 2 and the third valve 15 are closed.

[0061] S3: stirring the reaction medium by the stirrer 8; specifically, turning on the stirrer 8, adjusting the rotation speed to 2000 r / min, continuing the stirring time for 30 min / , and finally waiting for the pressure of the reaction chamber 6 to stabilize.

[0062] The reaction rock sample is fully contacted with the reaction medium through the clamp 9, the current water level of the reaction chamber 6 is recorded, and the second condition is met; specifically, the rock sample clamp 9 lifter is adjusted to place the reaction rock sample in the middle of the reaction chamber 6, ensuring that the clamping rod of the clamp 9 cannot be immersed in water, and ensuring that the microscope 12 lens can observe the reaction rock sample at all angles.

[0063] S4: Test the mass change of the reaction rock sample at different temperatures and the water level change of the reaction chamber 6, or test the mass change of the reaction rock sample at different pressures and the water level change of the reaction chamber 6, or test the surface morphology change of the reaction rock sample at different pressures. Specifically, record the initial water level H1 in the reaction chamber 6 at this time, use an industrial microscope to observe the surface morphology change of the rock sample at intervals of 1h, record the water level H2, H3, H4... in the reaction chamber 6 at different times, the reaction water density ρ2, ρ3, ρ4... The dissolved mass M=ρliquid g(H1-HN)*100 at different times. After the experiment is completed, open the pressure relief pipe 14 to relieve the pressure of the reaction chamber 6 step by step.

[0064] Furthermore, through the steps S1 to S4, it can be known that at different temperatures, the first condition is that the pressure of the reaction chamber 6 is 30 to 70 MPa; under different pressures, the first condition is generally to set the surface temperature of the reaction chamber 6 to be constant at 70 to 150 degrees Celsius.

[0065] Furthermore, it can be known from steps S1 to S4 that the second condition is that the clamping rod of the clamp 9 cannot be immersed in water, and the microscope 12 observes the reaction rock sample at all angles.

[0066] The following experiments are conducted on different temperatures and pressures in combination with steps S1 to S4, as follows:

[0067] Experiment 1: Test of the interaction between carbon dioxide, reactive rock samples and simulated formation water at different temperatures

[0068] The mass M1 of the reaction rock sample before the reaction is measured by an electronic balance, the reaction rock sample is placed on the rock sample holder 9 and placed in the reaction chamber 6, the simulated formation water is placed in the water storage kettle 3, the carbon dioxide is placed in the gas storage kettle 4, the valve connecting the water storage kettle 3 and the injection pump 1 on the six-way valve is opened, the horizontal valve between the water storage kettle 3 and the reaction chamber 6 is opened, and the injection pump 1 is started to inject the simulated formation water in the water storage kettle 3 into the reaction chamber 6 at a speed of 5 mL / min. The injection volume is about 2 / 3 of the internal volume of the reaction chamber 6, and then the horizontal valve between the reaction chamber 6 and the water storage kettle 3 is closed, the six-way valve connecting the water storage kettle 3 and the injection pump 1 is closed, the horizontal valve between the gas storage kettle 4 and the reaction chamber 6 is opened, the six-way valve connecting the gas storage kettle 4 and the injection pump 1 is opened, and carbon dioxide is injected into the reaction chamber 6. When the pressure in the reaction chamber 6 is 30 MPa, the gas injection is stopped, the injection pump 1 is closed, the valve on the six-way valve is closed, and the horizontal valve between the gas storage kettle 4 and the reaction chamber 6 is closed. Turn on the stirrer 8, adjust the speed to 2000r / min, and continue stirring for 30min. After the pressure in the reaction chamber 6 is stable, adjust the rock sample holder 9 lifter to place the rock sample to be reacted in the middle of the reaction chamber 6, ensure that the clamping rod of the holder 9 cannot be immersed in water, ensure that the lens of the microscope 12 can observe the reaction rock sample at all angles, record the initial water level height H1 in the reaction chamber 6 at this time, set the constant temperature system temperature to 50, 60, 70, 80, and 90°C respectively, record the water level height of the reaction chamber 6 after the reaction is complete, the water sample density, and calculate the mass of the reaction rock sample after the reaction at different temperatures. The results are shown in Table 1.

[0069] Table 1: Mass changes of reaction rock samples after carbon dioxide reacts with reaction rock samples and simulated formation water at different temperatures

[0070]

[0071]

[0072] Experiment 2: Test of the interaction between carbon dioxide, rocks and formation water under different pressures

[0073] The constant temperature heating system was adjusted to set the experimental temperature to 70°C, and the mass M1 of the reaction rock sample before the reaction was measured by an electronic balance. The reaction rock sample was placed on the rock sample holder 9 and placed in the reaction chamber 6. The simulated formation water was placed in the water storage kettle 3, and the carbon dioxide was placed in the gas storage kettle 4. Then, the carbon dioxide and simulated formation water were injected into the reaction chamber 6 in the same manner as in Experiment 1. When the pressure was controlled, the pressure in the reaction chamber 6 was controlled to be 10MPa, 20MPa, 30MPa, 40MPa, and 50MPa by gas injection. Then, the injection pump 1 was turned off, the six-way valve was turned off, and the third valve 15 was turned off. After the reaction was complete, the water level height of the reaction chamber 6 and the water sample density were recorded, and the mass of the reaction rock sample after the reaction under different pressures was calculated. The results are shown in Table 2.

[0074] Table 2: Mass changes of rock samples after carbon dioxide reacts with reaction and simulated formation water at different pressures

[0075]

[0076] Experiment 3: Microscopic morphology test of the interaction between carbon dioxide, rocks and formation water under different pressures

[0077] The steps of Experiment 2 are adopted, except that the water level in the reaction chamber 6, the water sample density, and the mass of the reaction rock sample do not need to be recorded after the reaction is complete. Instead, the microscopic morphology of the surface of the reaction rock sample is observed using a microscope 12 after the reaction is complete. The changes in the 10MPa to 50MPa range are shown in FIG. Figures 4 to 9 As shown in the figure, the degree of mineral surface dissolution gradually increases with the increase of reaction pressure.

[0078] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device, characterized in that: include: A filling assembly is provided with an injection pump (1) for injecting a reaction medium into a reaction chamber (6), wherein the reaction medium includes carbon dioxide and simulated formation water; The reaction chamber (6) is provided with a stirrer (8) and a clamp (9); the stirrer (8) is located inside the reaction chamber (6) and is used to stir the reaction medium; the clamp (9) extends from the outside to the inside of the reaction chamber (6) and is used to clamp the reaction rock sample and adjust the horizontal height of the clamped rock sample in the reaction chamber (6); An observation window (10) is provided on a surface of the reaction chamber (6); A density meter (11), used to detect the density value of the reaction medium; A microscope (12) for observing the morphology of the reaction rock sample through the observation window (10); The computer (13) is connected to the microscope (12) and is used to obtain the morphology of the reaction rock sample observed by the microscope (12).

2. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device according to claim 1, characterized in that: The filling assembly also includes a water storage kettle (3) and a gas storage kettle (4); The injection pump (1) is connected to a first valve (2), and the first valve (2) is respectively connected to one end of the water storage kettle (3) and one end of the gas storage kettle (4); The other end of the water storage kettle (3) is connected to the reaction chamber (6) via a pipeline; The other end of the gas storage kettle (4) is connected to the reaction chamber (6) via a pipeline.

3. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device according to claim 2, characterized in that: A second valve (5) is installed on the pipeline between the water storage kettle (3) and the reaction chamber (6); A third valve (15) is installed on the pipeline between the gas storage kettle (4) and the reaction chamber (6).

4. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device according to claim 1, characterized in that: The surface of the reaction chamber (6) is provided with a constant temperature heating layer (7), and the surface of the constant temperature heating layer (7) is provided with an observation port for an observation window (10).

5. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device according to claim 1, characterized in that: A pressure relief pipe (14) is also installed on the reaction chamber (6), and a fourth valve (16) is installed on the pressure relief pipe (14).

6. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device according to claim 1, characterized in that: The density meter (11) comprises a monitoring probe and a body, wherein the monitoring probe is located inside the reaction chamber (6), and the body is located outside the reaction chamber (6), and the monitoring probe and the body are connected via a wire.

7. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction device according to any one of claims 1 to 6, characterized in that: The upper end of the clamp (9) is located outside the reaction chamber (6), and the lower end extends into the interior of the reaction chamber (6), and the clamp (9) is used to slide or rotate relative to the reaction chamber (6) to control the horizontal height and direction of the reaction chamber (6).

8. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction method, used in a visualized high-temperature and high-pressure carbon dioxide water-rock reaction device as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: The mass of the reaction rock sample is measured and then placed into the reaction chamber (6) through the holder (9); A plurality of reaction media are sequentially added into the reaction chamber (6) through the filling assembly, and the first condition is satisfied; The reaction medium is stirred by means of a stirrer (8), The reaction rock sample is brought into full contact with the reaction medium through the clamp (9), and the current water level of the reaction chamber (6) is recorded, and the second condition is satisfied; Test the mass change of the reaction rock sample at different temperatures and the water level change of the reaction chamber (6), or test the mass change of the reaction rock sample at different pressures and the water level change of the reaction chamber (6), or test the surface morphology change of the reaction rock sample at different pressures.

9. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction method according to claim 8, characterized in that: At different temperatures, the first condition is that the pressure of the reaction chamber (6) is 30 to 70 MPa; Under different pressures, the first condition is to set the surface temperature of the reaction chamber (6) to 70 to 150 degrees Celsius.

10. A visualized high-temperature and high-pressure carbon dioxide water-rock reaction method according to claim 8 or 9, characterized in that: The second condition is that the clamping rod of the clamp (9) cannot be immersed in water, and the microscope (12) observes the reaction rock sample at all angles.

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