Real-time testing system and quantitative analysis method for basalt supercritical co2 mineralization reaction

Abstract

The application discloses a basalt supercritical CO2 mineralization reaction real-time testing system and a quantitative analysis method, and relates to the field of carbon sequestration technology. The system comprises a basalt microfluidic chip, a high-temperature and high-pressure reaction device, and an integrated temperature control system, a fluid pressure boosting system, a metering system and an image acquisition system. The basalt microfluidic chip adopts a multilayer composite sealing structure to simulate a reservoir fracture environment. The high-temperature and high-pressure reaction device regulates and controls the temperature and pressure conditions of a reduced reservoir through temperature and pressure coordination. The integrated temperature control system, the fluid pressure boosting system, the metering system and the image acquisition system realize real-time dynamic monitoring of the mineralization reaction of supercritical CO2 and basalt. Based on a deep learning algorithm and a seepage-reaction coupling model, the basalt microfluidic chip can automatically analyze the mineral precipitation morphology and the evolution law of the fracture structure and quantitatively characterize the dynamic correlation between the seepage characteristics and the reaction kinetics. The application significantly improves the experimental authenticity, observation resolution and analysis efficiency and provides reliable experimental support for the optimization of carbon sequestration technology.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of geological science and engineering technology, and particularly relates to a basalt reservoir supercritical CO2 mineralization reaction kinetics real-time testing system and quantitative analysis method. BACKGROUND

[0002] In the research of basalt CO2 geological storage, effective mineralization depends on three key processes: "CO2 carbonation", "mineral ionization" and "ion carbonization". However, the existing experimental technology relies on a non-transparent reaction kettle, and it is difficult to observe the dynamic changes of CO2 dissolution and diffusion, secondary mineral nucleation and growth, and fracture opening degree in situ by optical means. Although X-ray computed tomography (CT) or magnetic resonance imaging (MRI) technology can image specific stages of the above processes, it has low time resolution, high equipment cost, and poor compatibility with high temperature and high pressure acidic environment, which makes it impossible to capture the transient details of the mineralization reaction in real time, seriously hindering the in-depth analysis and quantitative research of the reaction kinetics mechanism.

[0003] In recent years, microfluidic technology has been gradually applied to CO2 storage research, but still has certain limitations, mainly including: the widely used polydimethylsiloxane (PDMS) chip has insufficient temperature resistance and easily softens and deforms at high temperatures; although quartz glass can withstand high pressure, its physical and chemical properties are significantly different from basalt, and it cannot truly simulate the mineralization reaction process of basalt-super critical CO2. Therefore, the materials and processes of the current microfluidic technology cannot balance the stability of extreme environment and the authenticity of reservoir conditions, resulting in a large deviation between experimental data and real scene.

[0004] In addition, the existing analysis method highly depends on manual image processing and parameter extraction, which is low in efficiency and poor in repeatability. For example, the identification of mineral precipitation area needs manual annotation, and the evolution rate of fracture opening needs to be measured frame by frame, which not only consumes time and effort, but also easily introduces subjective errors; at the same time, the correlation analysis of seepage data and structural evolution lacks efficient automatic tools, resulting in insufficient precision of the constructed seepage-reaction coupling model, which further limits the quantitative evaluation and process optimization of carbon storage efficiency.

[0005] The above technical bottlenecks have caused the research on supercritical CO2 mineralization reaction in basalt reservoirs to remain in the static or low-precision simulation stage for a long time, and there is an urgent need for a technical solution that can truly restore reservoir conditions, support high-resolution dynamic observation and intelligent analysis. SUMMARY

[0006] The purpose of the present application is to provide a basalt supercritical CO2 mineralization reaction real-time testing system and quantitative analysis method to solve the problems in the prior art.

[0007] To achieve the above purpose, the technical solution adopted by the present application is:

[0008] A real-time testing system for supercritical CO2 mineralization reaction in basalt includes:

[0009] A basalt microfluidic chip, which is used to simulate the seepage environment of basalt reservoirs and to support the supercritical CO2 mineralization reaction of basalt;

[0010] A reaction device is used to simulate in-situ temperature and pressure conditions of basalt reservoirs, and the basalt microfluidic chip is loaded in the reaction device;

[0011] A fluid pressurization system, comprising a gas pressurization system and a micro-liquid injection system, wherein the gas pressurization system is connected to the basalt microfluidic chip via an input pipeline, the gas pressurization system is used to pressurize CO2 gas to a supercritical state and deliver it to the basalt microfluidic chip, and the micro-liquid injection system is used to inject fluid;

[0012] The micro-liquid injection system is connected to the temperature control system, which is connected to the basalt microfluidic chip via an input pipeline. The temperature control system is used to preheat and regulate the temperature of the fluid.

[0013] A metering system, which connects the basalt microfluidic chip and the reaction device, is used to monitor the fluid flow rate, gas output, and temperature and pressure parameters in the reaction device in real time.

[0014] An image acquisition system, which is installed on the reaction device, is used for real-time observation and recording of the dynamic process of the mineralization reaction.

[0015] This testing system integrates a basalt microfluidic chip, a high-temperature and high-pressure reaction device, a temperature control system, a fluid pressurization system, a metering system, and an image acquisition system. It can realize real-time dynamic monitoring of the supercritical CO2 reaction with basalt mineralization. Based on deep learning algorithms and a seepage-reaction coupling model, it can automatically analyze the morphology of mineral precipitation and the evolution of fracture structure, and quantitatively characterize the influence of reaction kinetics on seepage characteristics.

[0016] The basalt microfluidic chip used in this testing system possesses excellent sealing and high-temperature, high-pressure resistance, enabling it to accurately reproduce the temperature and pressure conditions of basalt reservoirs. The high-temperature, high-pressure reaction device can realistically replicate the temperature and pressure conditions of basalt reservoirs. Through a high-precision temperature control system, fluid pressurization system, combined with a metering system and image acquisition system, it can acquire real-time images of the basalt-supercritical CO2 mineralization reaction, temperature and pressure conditions, and fluid parameters. This allows for high spatiotemporal resolution capture of the dynamic evolution of CO2 dissolution front expansion, secondary mineral nucleation and growth, and fracture opening.

[0017] Furthermore, the basalt microfluidic chip includes a sapphire glass substrate and a sapphire glass cover plate. An epoxy resin layer is disposed between the sapphire glass substrate and the sapphire glass cover plate. Basalt flakes are disposed within the epoxy resin layer. The basalt flakes have fissure channels. A metal tube connected to and communicating with the fissure channels is also disposed within the epoxy resin layer. An injection port and an injection outlet are provided on the sapphire glass substrate. One metal tube is connected to the injection port, and the other metal tube is connected to the injection outlet. The injection port is connected to the input pipeline, and the injection outlet is connected to the output pipeline.

[0018] Furthermore, the reaction device includes a heat-resistant clamp for holding and fixing the basalt microfluidic chip, and the heat-resistant clamp is provided with a heating and heat-insulating sleeve.

[0019] Furthermore, the gas boosting system includes a driving gas source and a medium gas source, which are respectively connected to a gas boosting pump. The gas boosting pump is connected to a gas storage tank, and the output end of the gas storage tank is equipped with a pressure regulating valve. The pressure regulating valve adjusts the gas output pressure and is connected to the input pipeline.

[0020] Furthermore, the micro-liquid injection system includes a storage tank and a micro-liquid injection pump connected to the storage tank, the output of which is connected to the temperature control system.

[0021] Furthermore, the temperature control system includes multiple intermediate temperature control containers, each intermediate temperature control container is connected to a temperature control instrument, and the output end of each intermediate temperature control container is equipped with an intermediate container high-pressure ball valve and connected to the input pipeline.

[0022] Furthermore, the metering system includes a high-precision balance and a micro gas flow meter. The fluid output from the basalt microfluidic chip is processed by gas-liquid separation, and the high-precision balance collects liquid flow data in real time. The micro gas flow meter measures the gas volume in real time.

[0023] Furthermore, the metering system also includes temperature and pressure sensors installed at the input and output ends of the basalt microfluidic chip. The reaction device is also connected to a ring pressure tracking pump, which is used to balance the internal and external pressures of the basalt microfluidic chip. The output pipeline of the basalt microfluidic chip is also connected to a back pressure pump, which is used to regulate the pressure of the output fluid.

[0024] Furthermore, the image acquisition system includes a microscope and a CCD camera mounted on the reaction device, and a computer connected to the microscope and the CCD camera.

[0025] A quantitative analysis method based on a real-time testing system for supercritical CO2 mineralization reaction in basalt, the quantitative analysis method comprising the following steps:

[0026] Prepare the basalt microfluidic chip;

[0027] The basalt microfluidic chip is installed in the reaction device;

[0028] Supercritical CO2 gas and fluid injection: Before injection, the internal and external pressures of the basalt microfluidic chip are adjusted to equilibrium; then, the CO2 gas pressure is adjusted to the experimental set value through the gas pressurization system and delivered to the basalt microfluidic chip; at the same time, the fluid is injected into the temperature control system and preheated to the target temperature using the micro-liquid injection system, and then the fluid is delivered to the basalt microfluidic chip;

[0029] The image acquisition system captures dynamic images of the basalt and supercritical CO2 mineralization reaction in real time, and the metering system simultaneously monitors the fluid data in the basalt microfluidic chip.

[0030] The dynamic image is segmented and tracked to extract dynamic parameters;

[0031] Establish a dynamic coupling model of seepage-reaction: By fusing the acquired fluid data, the cubic law is used to describe the fracture seepage of supercritical CO2 gas, and the fracture aperture is obtained through the dynamic parameters. Time variables and reaction kinetics correction terms are introduced to establish the dynamic coupling model of seepage-reaction.

[0032] Compared with existing technologies, the beneficial effects of this invention are: 1. This testing system integrates a basalt microfluidic chip, a high-temperature and high-pressure reaction device, a temperature control system, a fluid pressurization system, a metering system, and an image acquisition system. It can achieve real-time dynamic monitoring of the supercritical CO2 reaction with basalt mineralization, and based on deep learning algorithms and a seepage-reaction coupling model, it automatically analyzes the morphology of mineral precipitation and the evolution of fracture structures, quantitatively characterizing the influence of reaction kinetics on seepage characteristics; 2. The basalt microfluidic chip used in this testing system has excellent sealing and high-temperature and high-pressure resistance, and can realistically reproduce the temperature and pressure conditions of basalt reservoirs; 3. The high-temperature and high-pressure reaction device can realistically reproduce... The temperature and pressure conditions of basalt reservoirs are analyzed, and high-precision temperature control systems, fluid pressurization systems, combined with metering and image acquisition systems, are used to collect real-time images of basalt-supercritical CO2 mineralization reactions, temperature and pressure conditions, and fluid parameters. This allows for high spatiotemporal resolution capture of the dynamic evolution of CO2 dissolution front expansion, secondary mineral nucleation and growth, and fracture opening. 4. This quantitative analysis method, based on automated identification and tracking of secondary mineral nucleation, growth, and morphological changes, significantly improves the quantitative efficiency of mineral precipitation area and fracture opening evolution parameters. Simultaneously, by modifying the cubic law and synchronously integrating real-time fluid data and fracture opening evolution parameters, the influence mechanism of mineralization reactions on seepage characteristics can be quantitatively characterized. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall layout of a real-time testing system for supercritical CO2 mineralization reaction in basalt according to the present invention.

[0034] Figure 2 This is an exploded perspective view of the basalt microfluidic chip of the present invention.

[0035] Figure 3 This is a schematic diagram of the cross-sectional structure of the heat-resistant clamp of the present invention;

[0036] Figure 4 This is a schematic diagram showing the placement of the basalt microfluidic chip in the heat-resistant clamp of the present invention;

[0037] Figure 5 This is an architecture diagram of the image recognition-segmentation-tracking algorithm of the present invention;

[0038] In the diagram: 1. Basalt microfluidic chip; 101. Sapphire glass substrate; 102. Sapphire glass cover plate; 103. Epoxy resin layer; 104. Basalt sheet; 105. Fracture channel; 106. Metal tube; 107. Injection port; 108. Injection outlet; 2. Reaction device; 201. Columnar body; 202. Through hole; 203. Upper cover plate; 204. Lower cover plate; 205. Sapphire viewing window; 206. Inlet / outlet channel; 207. Pressure regulating channel; 3. Temperature control system; 301. Intermediate temperature control container; 302. High-pressure ball valve of intermediate container; 4. Fluid pressurization system; 401. Driving gas source; 402. Driving gas source mechanical valve; 403. Solenoid valve; 404. Driving gas pressure gauge; 405. Medium gas source; 406. Medium gas source mechanical valve 407. Gas source pressure gauge; 408. Gas booster pump; 409. Gas storage tank; 410. Gas storage tank pressure gauge; 411. Gas storage tank valve; 412. Pressure regulating valve; 413. Output gas pressure gauge; 414. Gas output valve; 415. Liquid storage tank; 416. Micro-liquid injection pump; 5. Metering system; 501. High-precision balance; 502. Micro-gas flow meter; 503. Injection port valve; 504. Injection port pressure sensor; 505. Injection outlet valve; 506. Injection outlet pressure sensor; 507. Ring pressure tracking pump; 508. Back pressure pump liquid storage tank; 509. Back pressure pump; 510. Back pressure pump pressure gauge; 511. Liquid outlet valve; 6. Image acquisition system; 601. Microscope; 602. CCD camera; 603. Computer. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, 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 invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1

[0041] like Figure 1 As shown, a real-time testing system for supercritical CO2 mineralization reaction in basalt includes:

[0042] Basalt microfluidic chip 1, the basalt microfluidic chip 1 is used to simulate the seepage environment of basalt reservoir and to carry the supercritical CO2 mineralization reaction of basalt;

[0043] Reaction device 2, which is used to simulate the in-situ temperature and pressure conditions of basalt reservoir, wherein the basalt microfluidic chip 1 is loaded in the reaction device 2;

[0044] The fluid pressurization system 4 includes a gas pressurization system and a micro-liquid injection system. The gas pressurization system is connected to the basalt microfluidic chip 1 through an input pipeline. The gas pressurization system is used to pressurize CO2 gas to a supercritical state and deliver it to the basalt microfluidic chip 1. The micro-liquid injection system is used to inject fluid.

[0045] The micro-liquid injection system is connected to the temperature control system 3, which is connected to the basalt microfluidic chip 1 through an input pipeline. The temperature control system 3 is used to preheat and regulate the temperature of the fluid.

[0046] Metering system 5, which is connected to the basalt microfluidic chip 1 and the reaction device 2, is used to monitor the fluid flow rate, gas output and temperature and pressure parameters in the reaction device in real time;

[0047] Image acquisition system 6, which is installed on the reaction device 2, is used for real-time observation and recording of the dynamic process of mineralization reaction.

[0048] This testing system integrates a basalt microfluidic chip 1, a high-temperature and high-pressure reaction device 2, a temperature control system 3, a fluid pressurization system 4, a metering system 5, and an image acquisition system 6. It can realize real-time dynamic monitoring of the supercritical CO2 reaction with basalt mineralization, and based on deep learning algorithms and seepage-reaction coupling models, it can automatically analyze the mineral precipitation morphology and fracture structure evolution law, and quantitatively characterize the influence of reaction kinetics on seepage characteristics.

[0049] The basalt microfluidic chip 1 used in this testing system has excellent sealing and high-temperature and high-pressure resistance, and can accurately reproduce the temperature and pressure conditions of basalt reservoirs. The high-temperature and high-pressure reaction device can accurately reproduce the temperature and pressure conditions of basalt reservoirs, and through a high-precision temperature control system, fluid pressurization system, combined with a metering system and an image acquisition system, it can acquire images of basalt-supercritical CO2 mineralization reaction, temperature and pressure conditions, and fluid parameters in real time. It can capture the dynamic evolution of CO2 dissolution front expansion, secondary mineral nucleation and growth, and fracture opening with high spatiotemporal resolution.

[0050] Furthermore, in combination Figure 2As shown, the basalt microfluidic chip 1 includes a sapphire glass substrate 101 and a sapphire glass cover plate 102. An epoxy resin layer 103 is provided between the sapphire glass substrate 101 and the sapphire glass cover plate 102. A basalt sheet 104 is provided within the epoxy resin layer 103. A single fissure channel 105 is provided on the basalt sheet 104. A metal tube 106 connected to and communicating with the fissure channel 105 is also provided within the epoxy resin layer 103. An injection port 107 and an injection outlet 108 are provided on the sapphire glass substrate 101. One metal tube 106 is connected to the injection port 107, and the other metal tube 106 is connected to the injection outlet 108. The injection port 107 is connected to the input pipeline, and the injection outlet 108 is connected to an outwardly extending output pipeline.

[0051] The basalt microfluidic chip 1, through a multi-layered composite encapsulation, encapsulates the basalt sheet within it, preserving the natural rock morphology, active mineral surfaces, and natural rough surfaces. This directly replicates the dissolution-precipitation reaction process of CO2 in the pores of real basalt, significantly improving the realism of the mineralization reaction simulation. Furthermore, combined with this testing system, it can support real-time observation and quantitative analysis of the dynamic process of CO2 dissolution-mineralization reaction under high temperature, high pressure, and acidic conditions, providing favorable conditions for revealing the kinetic mechanism of basalt-CO2 mineralization reaction.

[0052] The fissure channel 105 on the basalt sheet 104 is connected to the injection port 107 and the injection outlet 108 through a pair of metal tubes 106, allowing it to receive and discharge fluid. These components are all encapsulated in the chip, so that when using it, you only need to place the entire microfluidic chip in the designated position and fix it, and connect the input and output pipelines, which is relatively convenient to operate.

[0053] Specifically, the sapphire glass substrate 101 at the bottom, the sapphire glass cover plate 102 at the top, the basalt sheet 104, and the epoxy resin layer 103 are sealed together by multiple bolts in the axial direction. The sapphire glass substrate 101 has an injection port 107 and an injection outlet 108 pre-set along the diagonal direction, and bolt connection holes are symmetrically arranged. Similarly, the sapphire glass cover plate 102 at the top also has bolt connection holes symmetrically arranged along the diagonal direction to match the sapphire glass substrate. The basalt sheet 104 is cut and polished and then etched with a single fracture channel. Two Hastelloy metal tubes are pre-embedded in the epoxy resin layer 103, one end of which extends to the injection port / injection outlet of the bottom sapphire glass substrate, and the other end communicates with the fracture channel. The above-mentioned sealing method is used to meet the high temperature and high pressure sealing requirements of the supercritical CO2 mineralization reaction.

[0054] One method for preparing the basalt microfluidic chip is as follows:

[0055] First, a basalt core is selected, and a basalt sheet 104 is prepared. After chemical polishing to improve the light transmittance, a single fracture channel is processed on the sheet. Then, an epoxy resin layer 103 containing two pre-embedded Hastelloy metal tubes is cast using a silicone mold. Subsequently, a rectangular accommodating cavity matching the rock sheet is cut out in the middle of the epoxy resin layer 103, and bolt connection holes matching the bottom and top sapphire glass plates are drilled symmetrically along the diagonal. Finally, the epoxy resin layer 103 is bonded to the bottom sapphire glass substrate 101, and the single fracture channel is connected to the bottom sapphire glass substrate injection port 107 / injection outlet 108 through the Hastelloy metal tubes. The top sapphire glass cover plate is pressed and sealed onto the epoxy resin layer 103 using through bolts, thus completing the encapsulation of the high-pressure resistant basalt microfluidic chip.

[0056] Furthermore, the reaction device 2 includes a heat-resistant clamp for holding and fixing the basalt microfluidic chip 1. The heat-resistant clamp is provided with a heating and heat-insulating sleeve, which can heat and insulate the chip.

[0057] In some implementations, such as Figure 3 and Figure 4 As shown, the heat-resistant clamp includes a cylindrical body 201. The cylindrical body 201 has an axial through hole 202 and countersunk holes with a diameter larger than the through hole at the upper and lower ends. The upper countersunk hole forms a support platform for placing the basalt microfluidic chip 1. The upper and lower ends of the cylindrical body 201 are respectively provided with an upper cover plate 203 and a lower cover plate 204, which are fixed by bolts to form a closed structure. The lower end face of the upper cover plate 203 is provided with a downward annular pressure arm, which can press down the four corners of the basalt microfluidic chip 1 to fix it. The middle of the upper cover plate 203 is provided with a sapphire viewing window 205. A sapphire viewing window 205 is also provided at the countersunk hole below the through hole 202 and is pressed by the lower cover plate 204. With this arrangement, the basalt microfluidic chip 1 can be directly observed from the middle. The columnar body 201 can be provided with inlet and outlet channels 206, which connect to the injection port 107 and the injection outlet 108 to connect to the input and output pipelines. After the basalt microfluidic chip 1 is assembled, the through holes above and below it form a relatively sealed space. The columnar body 201 can be provided with a pressure regulating channel 207, which connects to this space. The pressure regulating channel 207 is connected to the annular pressure tracking pump 507 through a pipeline, which can regulate the annular pressure of the basalt microfluidic chip 1. The outer periphery of the columnar body 201 is wrapped with the heating and insulation sleeve.

[0058] Furthermore, the gas boosting system includes a driving gas source 401 and a medium gas source 405. The driving gas source 401 and the medium gas source 405 are respectively connected to a gas boosting pump 408. The gas boosting pump 408 is connected to a gas storage tank 409. The output end of the gas storage tank 409 is provided with a pressure regulating valve 412. The pressure regulating valve 412 adjusts the gas output pressure and is connected to the input pipeline.

[0059] The pipeline between the driving gas source 401 and the gas booster pump 408 is also equipped with a driving gas source mechanical valve 402, a solenoid valve 403 and a driving gas pressure gauge 404. The pipeline between the medium gas source 405 and the gas booster pump 408 is equipped with a medium gas source mechanical valve 406 and a medium gas source pressure gauge 407. Through the setting of these valves and pressure gauges, the required gas can be introduced as needed and the gas pressure can be monitored in real time.

[0060] The gas storage tank 409 is equipped with a gas storage tank pressure gauge 410, and a gas storage tank valve 411 is also provided between it and the pressure regulating valve; an output gas pressure gauge 413 and a gas output valve 414 are also provided between the pressure regulating valve 412 and the input pipeline, so as to control the gas output to the input pipeline.

[0061] CO2 is pressurized by the gas booster pump 408 and stored in the gas storage tank 409. The pressure regulating valve 412 regulates the output pressure, and the pressure gauge displays the pressure status of the gas source, the gas storage tank and the output gas in real time.

[0062] Furthermore, the micro-liquid injection system includes a storage tank 415 and a micro-liquid injection pump 416 connected to the storage tank 415, the output end of the micro-liquid injection pump 416 being connected to the temperature control system 3.

[0063] The micro-liquid injection system supports remote computer control, allows for real-time adjustment of operating parameters, and its liquid-contacting components are compatible with various fluids (including corrosive, high-temperature, and viscous media). It is also equipped with a variety of data interfaces for parameter monitoring.

[0064] Furthermore, the temperature control system 3 includes multiple intermediate temperature control containers 301, each intermediate temperature control container 301 is connected to a temperature control instrument, and the output end of each intermediate temperature control container 301 is provided with an intermediate container high-pressure ball valve 302 and connected to the input pipeline.

[0065] The intermediate temperature control container 301 can hold the delivered liquid. Heating devices (such as heating plates, hot air blowers, etc., or placed in a heating box) are provided around the intermediate temperature control container 301 to heat it. It is connected to the temperature control instrument and achieves rapid heating and high-precision temperature regulation through PID temperature control algorithm. The heating box control panel supports temperature setting, real-time display and remote terminal control.

[0066] Furthermore, the metering system 5 includes a high-precision balance 501 and a micro gas flow meter 502. The fluid output from the basalt microfluidic chip 1 is processed by gas-liquid separation and the high-precision balance 501 collects liquid flow data in real time, while the micro gas flow meter 502 measures the gas volume in real time.

[0067] Furthermore, the metering system 5 also includes temperature and pressure sensors disposed at the input and output ends of the basalt microfluidic chip 1. The temperature and pressure sensors can be integrated sensors or independent temperature and pressure sensors installed together, such as an injection port pressure sensor 504 connected to the input pipeline and an injection outlet pressure sensor 506 connected to the output pipeline, and are respectively equipped with an injection port valve 503 and an injection outlet valve 505; the temperature and pressure sensors monitor the temperature and pressure parameters of the input and output fluids in real time.

[0068] The reaction device 2 is also connected to a ring pressure tracking pump 507, which is used to balance the internal and external pressures of the basalt microfluidic chip 1. The output pipeline of the basalt microfluidic chip 1 is also connected to a back pressure pump 509, which is also connected to a back pressure pump storage tank 508 and a back pressure pump pressure gauge 510. The back pressure can be manually adjusted to adjust the output liquid pressure, realizing high-precision flow monitoring and dynamic pressure stability control during the experiment. The end of the output pipeline is also equipped with an outlet valve 511.

[0069] Furthermore, the image acquisition system 6 includes a microscope 601 and a CCD camera 602 mounted on the reaction device 2, and a computer 603 connected to the microscope 601 and the CCD camera 602.

[0070] The microscope 601 can provide high-magnification (150x) optical imaging and fluorescence observation functions. The CCD camera 602 captures 4K resolution images at a high frame rate (100fps) and stores them directly in the high-performance computer 603. Finally, image acquisition, processing, annotation and geometric parameter measurement are completed through professional image processing software. Example 2

[0071] A quantitative analysis method based on the real-time testing system for supercritical CO2 mineralization reaction of basalt in Example 1, the quantitative analysis method comprising the following steps:

[0072] Step 1: Prepare the basalt microfluidic chip 1.

[0073] Step 2: Install the basalt microfluidic chip 1 into the reaction device 2;

[0074] Specifically, the basalt microfluidic chip 1 is embedded in the main body of the reaction device, and an axial preload is applied to the injection port / injection port of the basalt microfluidic chip through a pressure-resistant clamp to achieve high-pressure sealing; then, the heating and insulation sleeve is fastened to the outer wall of the device with screws to form an integrated temperature control and pressure protection structure.

[0075] Step 3: Supercritical CO2 gas and fluid injection: Before injection, the internal and external pressures of the basalt microfluidic chip 1 are adjusted to equilibrium; then, the CO2 gas is pressurized to 50MPa through the gas pressurization system and stored in the gas storage tank 409, and the pressure is adjusted to the experimental set value (such as the critical state) by the pressure regulating valve 412 before being delivered to the basalt microfluidic chip 1; at the same time, the fluid (such as brine) is injected into the temperature control system 3 using the micro-liquid injection system and preheated to the target temperature, and then the fluid is delivered to the basalt microfluidic chip 1 to achieve high-pressure fluid injection.

[0076] Step 4: Real-time data acquisition. The image acquisition system 6 captures dynamic images of the basalt and supercritical CO2 mineralization reaction in real time. Simultaneously, the metering system monitors the fluid data in the basalt microfluidic chip. The fluid data includes changes in fluid temperature, pressure, and flow rate.

[0077] Step 5: Image segmentation and tracking algorithm development, performing image segmentation and tracking processing on the dynamic image to extract dynamic parameters;

[0078] Specifically, such as Figure 5 As shown, the specific process of developing an automated image processing algorithm based on a deep learning framework includes: first, performing mean denoising and contrast enhancement preprocessing on the acquired dynamic images of mineralization reactions to construct a training set containing 1000 labeled samples; then, training the model using a transfer learning strategy; next, using the trained model to identify and segment mineral precipitation areas, and combining a multi-target tracking algorithm to dynamically quantify the fracture aperture evolution rate and the spatial distribution law of secondary minerals, thereby realizing the automated identification and dynamic parameter extraction of the mineralization reaction process.

[0079] Step 6: Establish a dynamic coupling model of seepage-reaction: Integrate the acquired fluid data, use the cubic law to describe the fracture seepage of supercritical CO2 gas, and obtain the fracture aperture through the dynamic parameters. b ( t By introducing time variables and reaction kinetics correction terms, the seepage-reaction dynamic coupling model is established, as follows:

[0080] ,

[0081] Where Q(t) is the real-time volumetric flow rate, μ is the fluid dynamic viscosity, L is the crack length, A is the cross-sectional area (width × height) of the fluid flow direction in the chip, and ΔP(t) is the pressure difference between the chip inlet and outlet. The rate of change of opening can be calculated by time series image analysis, and β is the reaction kinetic correction coefficient, which can be determined by fitting the experimental data using the least squares method.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A real-time testing system for supercritical CO2 mineralization reaction of basalt, characterized in that, include: A basalt microfluidic chip, which is used to simulate the seepage environment of basalt reservoirs and to support the supercritical CO2 mineralization reaction of basalt; A reaction device is used to simulate in-situ temperature and pressure conditions of basalt reservoirs, and the basalt microfluidic chip is loaded in the reaction device; A fluid pressurization system, comprising a gas pressurization system and a micro-liquid injection system, wherein the gas pressurization system is connected to the basalt microfluidic chip via an input pipeline, the gas pressurization system is used to pressurize CO2 gas to a supercritical state and deliver it to the basalt microfluidic chip, and the micro-liquid injection system is used to inject fluid; The micro-liquid injection system is connected to the temperature control system, which is connected to the basalt microfluidic chip via an input pipeline. The temperature control system is used to preheat and regulate the temperature of the fluid. A metering system, which connects the basalt microfluidic chip and the reaction device, is used to monitor the fluid flow rate, gas output, and temperature and pressure parameters in the reaction device in real time. An image acquisition system, which is installed on the reaction device, is used for real-time observation and recording of the dynamic process of the mineralization reaction; The basalt microfluidic chip includes a sapphire glass substrate and a sapphire glass cover plate. An epoxy resin layer is disposed between the sapphire glass substrate and the sapphire glass cover plate. Basalt flakes are disposed within the epoxy resin layer. The basalt flakes have fissure channels. A metal tube connected to and communicating with the fissure channels is also disposed within the epoxy resin layer. An injection port and an injection outlet are provided on the sapphire glass substrate. One metal tube is connected to the injection port, and the other metal tube is connected to the injection outlet. The injection port is connected to the input pipeline, and the injection outlet is connected to the output pipeline.

2. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The reaction device includes a heat-resistant clamp for holding and fixing the basalt microfluidic chip, and the heat-resistant clamp is provided with a heating and heat-insulating sleeve.

3. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The gas boosting system includes a driving gas source and a medium gas source. The driving gas source and the medium gas source are respectively connected to a gas boosting pump. The gas boosting pump is connected to a gas storage tank. The output end of the gas storage tank is equipped with a pressure regulating valve. The pressure regulating valve adjusts the gas output pressure and is connected to the input pipeline.

4. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The micro-liquid injection system includes a storage tank and a micro-liquid injection pump connected to the storage tank, the output of which is connected to the temperature control system.

5. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The temperature control system includes multiple intermediate temperature control containers, each connected to a temperature control instrument. The output end of each intermediate temperature control container is equipped with an intermediate container high-pressure ball valve and connected to the input pipeline.

6. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The metering system includes a high-precision balance and a micro gas flow meter. The fluid output from the basalt microfluidic chip is processed by gas-liquid separation, and the high-precision balance collects liquid flow data in real time. The micro gas flow meter measures the gas volume in real time.

7. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The metering system also includes temperature and pressure sensors installed at the input and output ends of the basalt microfluidic chip. The reaction device is also connected to a ring pressure tracking pump, which is used to balance the internal and external pressures of the basalt microfluidic chip. The output pipeline of the basalt microfluidic chip is also connected to a back pressure pump, which is used to regulate the pressure of the output fluid.

8. The real-time testing system for supercritical CO2 mineralization reaction of basalt according to claim 1, characterized in that, The image acquisition system includes a microscope and a CCD camera mounted on the reaction device, and a computer connected to the microscope and the CCD camera.

9. A quantitative analysis method using the real-time testing system for supercritical CO2 mineralization reaction of basalt as described in claim 1, characterized in that, The quantitative analysis method includes the following steps: Prepare the basalt microfluidic chip; The basalt microfluidic chip is installed in the reaction device; Supercritical CO2 gas and fluid injection: Before injection, the internal and external pressures of the basalt microfluidic chip are adjusted to equilibrium; then, the CO2 gas pressure is adjusted to the experimental set value through the gas pressurization system and delivered to the basalt microfluidic chip; at the same time, the fluid is injected into the temperature control system and preheated to the target temperature using the micro-liquid injection system, and then the fluid is delivered to the basalt microfluidic chip; The image acquisition system captures dynamic images of the basalt and supercritical CO2 mineralization reaction in real time, and the metering system simultaneously monitors the fluid data in the basalt microfluidic chip. The dynamic image is segmented and tracked to extract dynamic parameters; Establish a dynamic coupling model of seepage-reaction: By fusing the acquired fluid data, the cubic law is used to describe the fracture seepage of supercritical CO2 gas, and the fracture aperture is obtained through the dynamic parameters. Time variables and reaction kinetics correction terms are introduced to establish the dynamic coupling model of seepage-reaction.

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