Carbon dioxide migration visualization device and preparation method of heterogeneous rock stratum

Abstract

The invention relates to a carbon dioxide migration visualization device and a preparation method of a heterogeneous rock stratum, relates to the technical field of simulation tests, and is used for solving the problems that in the prior art, the migration rule of carbon dioxide in a rock stratum is difficult to observe, and the accuracy of an observation result is not high. Comprising a mounting base, an environment simulation system, an observation system and a control system, a transparent simulation box is arranged on the mounting base, the environment simulation system comprises an axial pressure simulation mechanism, a confining pressure simulation mechanism, a temperature simulation mechanism and a sorting mechanism, and the temperature simulation mechanism is arranged at the bottom of the transparent simulation box; the confining pressure simulation mechanism and the arrangement mechanism are arranged on one side of the transparent simulation box, the axial pressure simulation mechanism is arranged on the top of the transparent simulation box, and the control system is electrically connected with the axial pressure simulation mechanism, the confining pressure simulation mechanism, the temperature simulation mechanism, the arrangement mechanism and the observation system.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation experiments, and in particular to a device for visualizing carbon dioxide migration and a method for preparing a heterogeneous rock formation. Background Art

[0002] In response to the urgent challenges of global warming and climate change, excessive emissions of greenhouse gases, especially carbon dioxide, have become a focus that cannot be ignored. In order to effectively alleviate this problem, researchers are actively exploring carbon dioxide geological storage technology. One of the key strategies is to inject carbon dioxide into a combined rock system consisting of high permeability reservoirs and low permeability caprocks, and use the unique physical and chemical properties of these rock formations to achieve long-term and safe storage of carbon dioxide.

[0003] When carbon dioxide is injected into a deep reservoir, its higher density difference leads to significant buoyancy, which naturally drives the carbon dioxide to migrate upward. However, this migration process is not without obstacles. The heterogeneity of the reservoir plays a decisive role in the migration path of carbon dioxide and the ultimate storage efficiency. Specifically, when carbon dioxide attempts to move upward through the reservoir to below the cap rock, the cap rock, due to its extremely high breakthrough pressure and low permeability characteristics, acts as a natural barrier, effectively curbing the further upward migration of carbon dioxide, thereby promoting the stable storage of carbon dioxide in geological structures.

[0004] In view of this complex mechanism, the current research on the migration law of carbon dioxide is mainly divided into two directions: one is based on highly theoretical numerical simulation methods, which can provide relatively ideal prediction results by accurately constructing formation models, setting reasonable boundary conditions and simulating the migration process after carbon dioxide injection, but often simplifies the complexity of actual flow conditions to varying degrees. The second is a more intuitive indoor sand box experiment, which simulates the rock structure with different permeabilities and uses alternative fluids to explore the migration law of carbon dioxide. Although this type of method can reflect the influence of rock permeability on carbon dioxide migration to a certain extent, it is difficult to fully reproduce the in-situ conditions of the rock formation in the natural environment, especially ignoring the profound influence of complex factors such as rock composition, pore structure and stress state on carbon dioxide migration.

[0005] It is particularly worth mentioning that due to the colorless and transparent characteristics of carbon dioxide, the complex and changeable internal structure of heterogeneous rock formations, and the difficulty in accurately simulating the stress environment, it is particularly difficult to visually observe and accurately describe the migration process of carbon dioxide in an indoor environment. Therefore, future research needs to more deeply integrate numerical simulation and experimental verification, and explore new technical means, such as high-precision imaging and in-situ monitoring technology, to more comprehensively reveal the migration laws of carbon dioxide in the geological storage process, and provide a solid scientific basis for optimizing storage strategies and improving storage efficiency. Summary of the invention

[0006] In view of the defects in the prior art, the present invention provides a carbon dioxide migration visualization device and a method for preparing heterogeneous rock formations, which are used to solve the problems in the prior art that it is difficult to observe the migration law of carbon dioxide in rock formations and the accuracy of the observation results is not high.

[0007] In order to achieve the above object, the present invention provides a device for visualizing carbon dioxide migration, comprising: A mounting base, wherein a transparent simulation box is arranged on the mounting base; An environmental simulation system, the environmental simulation system comprising an axial pressure simulation mechanism, a confining pressure simulation mechanism, a temperature simulation mechanism and a finishing mechanism, the temperature simulation mechanism being arranged at the bottom of the transparent simulation box, the confining pressure simulation mechanism and the finishing mechanism being arranged at one side of the transparent simulation box, and the axial pressure simulation mechanism being arranged at the top of the transparent simulation box, for simulating a real rock formation environment; An observation system, the observation system comprising a high-speed camera and a fixed bracket, the fixed bracket being installed opposite to one side of the transparent simulation box, the high-speed camera being installed on the fixed bracket, and the high-speed camera being used to observe changes in the transparent simulation box; A control system, wherein the control system is electrically connected to the axial pressure simulation mechanism, the confining pressure simulation mechanism, the temperature simulation mechanism, the sorting mechanism and the observation system.

[0008] With this arrangement, the axial pressure simulation mechanism, the confining pressure simulation mechanism, the temperature simulation mechanism and the sorting mechanism are matched with each other, so that the rock mass in the transparent simulation box is closer to the real rock environment, thereby achieving the effect of improving the accuracy of the observation results.

[0009] Furthermore, a through hole is opened on one side of the transparent simulation box, and a sealing cover is rotatably installed at the through hole; a delivery pipe is detachably connected to the through hole, and a sealing ring matching the through hole is fixedly sleeved on the delivery pipe, and one end of the delivery pipe away from the transparent simulation box is fixedly connected to a carbon dioxide injection pump.

[0010] Furthermore, the confining pressure simulation mechanism includes a water pump, a water pressure controller and a water pressure monitor. One side of the transparent simulation box is fixedly connected to a box body, a plurality of permeable stones are placed in the box body, a connecting water pipe is fixedly connected between the water pump and the box body, the water pressure controller is fixedly installed on the connecting water pipe, and the water pressure monitor is fixedly installed inside the transparent simulation box.

[0011] Further, the axial pressure simulation mechanism includes a first mounting frame and a first sliding seat, the first mounting frame is fixedly mounted on the mounting base, the first mounting frame is fixedly mounted with a first guide rail and a first motor, the first mounting frame is rotatably mounted with a first transmission screw, the first motor is transmission-connected to the first transmission screw, the first sliding seat is slidably connected to the first guide rail and the first transmission screw, the bottom four corners of the first sliding seat are fixedly connected with first electric push rods, the movable ends of the four first electric push rods are commonly connected with a cover plate matching the transparent simulation box, and sealing strips are fixedly connected on all four sides of the cover plate.

[0012] Furthermore, the finishing mechanism includes a second mounting frame and a second sliding seat, the second mounting frame is fixedly mounted on the mounting base and is located on one side of the transparent simulation box, a second guide rail and a second motor are fixedly mounted on one side of the second mounting frame, a second transmission screw is rotatably mounted on one side of the second mounting frame, the second motor is transmission-connected to the second transmission screw, the second sliding seat is slidably connected to the second guide rail and the second transmission screw, an L-shaped bracket is fixedly connected to the second sliding seat, one end of the L-shaped bracket is fixedly connected to a second electric push rod, and the movable end of the second electric push rod is fixedly connected to a scraper matching the transparent simulation box.

[0013] Furthermore, it also includes a stone crushing system, which includes a stone crushing mechanism, an adjustment mechanism and a cross-transmission mechanism. The stone crushing mechanism is arranged on one side of the transparent simulation box, and the adjustment mechanism and the cross-transmission mechanism are both arranged on the stone crushing mechanism. The adjustment mechanism is used to adjust the degree of stone crushing; the stone crushing mechanism, the adjustment mechanism and the cross-transmission mechanism are all electrically connected to the control system.

[0014] Furthermore, the stone crushing mechanism includes a stone crushing box, a first knife roller and a second knife roller, the first knife roller rotates in the stone crushing box, the adjustment mechanism is arranged on the stone crushing box, the second knife roller is rotatably installed on the adjustment mechanism, and the first knife roller and the second knife roller are located in the same horizontal plane; a third motor is fixedly installed on one side of the stone crushing box, the third motor is transmission-connected to one end of the first knife roller, and the cross transmission mechanism is installed between the first knife roller and the second knife roller; a guide plate is obliquely installed in the stone crushing box, an outlet is opened on one side of the stone crushing box, and the end of the guide plate passes through the outlet and is pressed against the top of the transparent simulation box.

[0015] Further, the adjusting mechanism includes a third electric push rod and a moving seat, first slide grooves are provided on both sides of the crushing box, the moving seat is slidably connected in the first slide grooves, and the second knife roller is rotatably installed between the two moving seats; the third electric push rod is fixedly installed on the crushing box, and the movable end is fixedly connected to the moving seat; a second slide groove is provided on the side of the crushing box close to the second knife roller, and a fourth electric push rod is fixedly installed on the side of the crushing box located at the second slide groove, a sliding block is slidably connected in the second slide groove, and one end of the sliding block close to the second knife roller is fixedly connected to an inclined block, and the other end is fixedly connected to the movable end of the fourth electric push rod.

[0016] The cam is an axially-coupled device for translating a first gear of the second carrier into a plurality of axially-coupled gears, wherein the plurality of axially-coupled gears are connected to each other via a plurality of axially-coupled gears, wherein the plurality of axially-coupled gears are connected to each other via a plurality of axially-coupled gears.

[0017] A method for preparing a carbon dioxide migration visualization device, which is applicable to the above-mentioned carbon dioxide migration visualization device, is characterized in that it comprises the following steps: Steps to create simulated rock formations: S1: First, according to the actual distribution of rock layers, plan in advance the distribution of different rock layers and the size of gravel to be laid in the rock layers; S2: Start the third electric push rod, adjust the gap between the first knife roller and the second knife roller to tear out gravel of different sizes, and then input the gravel into the transparent simulation box through the guide plate; S3: After the first batch of crushed stones is transported to the transparent simulation box, the second motor is started to move the scraper to the corresponding position above the transparent simulation box, and then the second motor is temporarily turned off and the second electric push rod is started to place the scraper in the transparent simulation box, and then the second motor is started again to lay the crushed stones in the transparent simulation box in sections and blocks according to the actual rock formation information and the movement of the scraper, so that the rock formation is laid obliquely in the transparent simulation box; after completion, the above steps are reversed to move the scraper to one side outside the transparent simulation box; S4: Start the first motor, move the cover plate to the top of the transparent simulation box, then turn off the first motor and start the first electric push rods. The four first electric push rods cooperate with each other to extend and retract, so as to achieve the effect of pressing the cover plate horizontally or obliquely into the transparent simulation box, and apply pressure to the simulated rock formation in the transparent simulation box. After completion, reverse the above steps to move the cover plate to one side of the transparent simulation box. S5: Repeat steps S2-S4 until the rock strata laying work in the entire transparent simulation box is completed; S6: In the process of repeating steps S2-S4, when the rock layer is laid to the height of the through hole, the sealing cover is opened, and the conveying pipeline is inserted into the transparent simulation box, and the conveying pipeline is installed in advance; Experimental observation steps: P1: Start the heating rod to provide the corresponding temperature for the rock formation in the transparent simulation box to simulate the temperature of the environment in which the rock formation is located; P2: Start the first motor, move the cover plate to the top of the transparent simulation box, then turn off the first motor and start the first electric push rod to achieve the effect of pressing the cover plate horizontally into the transparent simulation box, exerting pressure on the simulated rock formation in the transparent simulation box to simulate the axial pressure of the environment in which the rock formation is located; P3: Start the water pump, water pressure controller and water pressure monitor to control the confining pressure of the rock formation in the transparent simulation box to simulate the confining pressure of the environment in which the rock formation is located; P4: inject litmus solution into the transparent simulation box through the sealing cover; P5: Start the carbon dioxide injection pump and provide a delivery pipeline to inject carbon dioxide into the rock formation in the transparent simulation box; P6: When the CO2 injection pump is started, a high-speed camera is turned on at the same time to record the color change of the litmus solution in the rock formation, that is, to record the migration path of CO2 in the rock formation and the change pattern of CO2 migration over time.

[0018] The beneficial effects of the present invention are: 1. The rock crushing system, axial pressure simulation mechanism, confining pressure simulation mechanism, temperature simulation mechanism and finishing mechanism are matched with each other to make the rock mass in the transparent simulation box closer to the real rock formation environment, thereby achieving the effect of improving the accuracy of the observation results; 2. Through the cooperation of the second motor, the second guide rail, the second sliding seat, the second electric push rod and the scraper, the effect of adjusting the partition and block placement of the rock formation in the transparent simulation box according to the actual rock formation environment is achieved; 3. By injecting litmus solution into the transparent simulation box, the litmus solution changes color when carbon dioxide reacts with water, making it easier to observe the migration of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of filling a single homogeneous rock layer in a transparent simulation box in a device for visualizing carbon dioxide migration according to an embodiment of the present invention; Figure 2 A schematic diagram of filling multiple homogeneous rock layers in a transparent simulation box in a device for visualizing carbon dioxide migration according to an embodiment of the present invention; Figure 3 A schematic diagram of filling a heterogeneous rock layer in a transparent simulation box in a device for visualizing carbon dioxide migration according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of a device for visualizing carbon dioxide migration according to an embodiment of the present invention; Figure 5 The carbon dioxide migration visualization device of the embodiment of the present invention Figure 4 A magnified view of the part A in the middle; Figure 6 The carbon dioxide migration visualization device of the embodiment of the present invention Figure 4 A magnified view of the part B in the middle; Figure 7 It is a schematic diagram of the cross-sectional structure of a gravel box in the device for visualizing carbon dioxide migration according to an embodiment of the present invention.

[0020] Among them, a mounting base 1, a transparent simulation box 2, a sealing cover 21, a carbon dioxide injection pump 22, and a delivery pipeline 23; A gravel box 310, a sealing plate 311, a third motor 312, a fourth motor 313, a second knife roller 314, a first knife roller 315, a mounting platform 316, and a guide plate 317; A third electric push rod 320, a moving seat 321, a telescopic plate 322, an inclined stopper 323, a second slide groove 324, a slider 325, and a fourth electric push rod 326; Mounting plate 330, third slide slot 331, fourth slide slot 332, spring 333, tensioning wheel 334, triangular block 335, pushing block 336; Belt 340, first pulley 341, second pulley 342; A first mounting frame 410, a first motor 411, a first guide rail 412, a first sliding seat 413, and a first electric push rod 414; Temperature simulation mechanism 42; A second mounting frame 431, a second motor 432, a second transmission screw 433, a second guide rail 434, a second sliding seat 435, an L-shaped bracket 436, a second electric push rod 437, and a scraper 438; Water pump 441, water pressure controller 442, connecting water pipe 443, box 444, water pressure monitor 445; High-speed camera 51 and fixing bracket 52 . DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not need to be adopted to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, software or methods are not specifically described.

[0022] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. In addition, it should be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale.

[0023] The present invention provides an embodiment of a carbon dioxide migration visualization device and a method for preparing a heterogeneous rock formation. Figure 4 The carbon dioxide migration visualization device includes: a mounting base 1, an environmental simulation system, an observation system and a control system. A transparent simulation box 2 is arranged on the mounting base 1. The environmental simulation system includes an axial pressure simulation mechanism, a confining pressure simulation mechanism, a temperature simulation mechanism 42 and a sorting mechanism. The temperature simulation mechanism 42 is arranged at the bottom of the transparent simulation box 2, and the confining pressure simulation mechanism and the sorting mechanism are both arranged on one side of the transparent simulation box 2. The axial pressure simulation mechanism is arranged above the transparent simulation box 2 to simulate the real rock environment and improve the accuracy of the observation results; the observation system is arranged on the opposite side of the transparent simulation box 2 to observe the changes in the transparent simulation box 2; the control system is electrically connected to the adjustment mechanism, the cross-transmission mechanism, the axial pressure simulation mechanism, the confining pressure simulation mechanism, the temperature simulation mechanism 42, the sorting mechanism and the observation system to control the normal operation of the device. Example

[0024] See also Figure 1-3 In this embodiment, a temperature simulation mechanism 42 is installed at the bottom of the transparent simulation box 2, and a water pump 441 is installed on the other three sides. A water pressure monitor 445 is installed on the pipe between the water pump 441 and the transparent simulation box 2. Water pressure controllers 442 are installed on both sides of the transparent simulation box 2. A water pressure monitor 445 is installed on the pipe between the water pressure controller 442 and the transparent simulation box 2. A receiving chamber is provided on one side of the transparent simulation box 2, and a number of permeable stones are placed in the receiving chamber. When in use, the temperature simulation mechanism 42 is used to simulate the ambient temperature, and the water pumps 441 and water pressure controllers 442 on three sides are used to control the water pressure around the transparent simulation box 2 to simulate the axial pressure and confining pressure in the environment. The transparent simulation box 2 is fixedly connected to a delivery pipeline 23, and one end of the delivery pipeline 23 located outside the transparent simulation box 2 is fixedly connected to a carbon dioxide injection pump 22. Carbon dioxide is delivered to the transparent simulation box 2 through the carbon dioxide injection pump 22, which facilitates the smooth progress of the subsequent observation test. For laying rock layers in the transparent simulation box 2, please refer to the reference Figure 1-3 , Figure 1 This is a schematic diagram of the laying of a single layer of homogeneous rock. Figure 2 This is a schematic diagram of laying multiple layers of homogeneous rock. Figure 3 This is a schematic diagram of the laying of heterogeneous rock layers. Example

[0025] See also Figure 4 , also includes a stone crushing system, the stone crushing system includes a stone crushing mechanism, an adjusting mechanism and a cross-transmission mechanism, the stone crushing mechanism is arranged on one side of the transparent simulation box 2, the adjusting mechanism and the cross-transmission mechanism are both arranged on the stone crushing mechanism, and are used to adjust the degree of stone crushing; the stone crushing mechanism, the adjusting mechanism and the cross-transmission mechanism are all electrically connected to the control system.

[0026] See also Figure 4 and Figure 7In this embodiment, the stone crushing mechanism includes a stone crushing box 310, a first knife roller 315 and a second knife roller 314, the first knife roller 315 rotates in the stone crushing box 310, the adjustment mechanism is arranged on the stone crushing box 310, the second knife roller 314 is rotatably installed on the adjustment mechanism, and the first knife roller 315 and the second knife roller 314 are located in the same horizontal plane; a third motor 312 is fixedly installed on one side of the stone crushing box 310, the third motor 312 is transmission-connected to one end of the first knife roller 315, and a cross transmission mechanism is installed between the first knife roller 315 and the second knife roller 314. When in use, the third motor 312 is started, and the output shaft of the third motor 312 drives the first knife roller 315 to rotate, and the second knife roller 314 and the first knife roller 315 are rotated toward each other through the cross transmission mechanism, so as to tear the stone. In this embodiment, a guide plate is obliquely installed in the stone crushing box 310, and the guide plate 317 is located below the first knife roller 315. An outlet is opened on one side of the stone crushing box 310, and the end of the guide plate 317 passes through the outlet and is pressed against the top of the transparent simulation box 2. After the stone crushing work is completed, the crushed stones fall into the transparent simulation box 2 from the outlet of the stone crushing box 310 along the guide plate 317. In this embodiment, a mounting platform 316 is fixedly installed at the outlet, and a closed plate 311 is rotatably installed on the mounting platform 316. A fourth motor 313 is fixedly installed on one side of the stone crushing box 310, and the output shaft of the fourth motor 313 is transmission-connected with one side of the closed plate 311. When in use, the fourth motor 313 is started, and the closed plate 311 is driven to rotate through the output shaft of the fourth motor 313, so as to achieve the effect of opening or closing the closed plate 311.

[0027] See also Figure 5 In this embodiment, the adjustment mechanism includes a third electric push rod 320 and a moving seat 321. First slide grooves are provided on both sides of the crushing box 310. The moving seat 321 is slidably connected in the first slide grooves. The second knife roller 314 is rotatably installed between the two moving seats 321. The third electric push rod 320 is fixedly installed on the crushing box 310. The movable end of the third electric push rod 320 is fixedly connected to the moving seat 321. When in use, the third electric push rod 320 is started to achieve the effect of moving the moving seat 321 left and right along the first slide groove, thereby achieving the purpose of adjusting the gap between the first knife roller 315 and the second knife roller 314 to control the size of the crushed stones.

[0028] See also Figure 7The second cutter roller 314 is provided with a second slide groove 324 on one side of the crushing box 310 near the second cutter roller 314, and a fourth electric push rod 326 is fixedly installed on the side of the crushing box 310 located at the second slide groove 324, and a sliding block 325 is slidably connected in the second slide groove 324, and one end of the sliding block 325 near the second cutter roller 314 is fixedly connected to an inclined stopper 323, and the other end is fixedly connected to the movable end of the fourth electric push rod 326. When the gap between the second cutter roller 314 and the first cutter roller 315 is adjusted, the fourth electric push rod 326 is started to drive the inclined stopper 323 to move up and down along the second slide groove 324, thereby adjusting the distance between the second cutter roller 314 and the inner wall of the crushing box, so as to prevent the crushed stones from falling along the gap between the second cutter roller 314 and the crushing box 310 during crushing, thereby affecting the crushing effect. In this embodiment, telescopic plates 322 are fixedly connected to both sides of the movable seat 321, and the ends of the telescopic plates 322 are fixedly connected to the side walls of the first slide groove. When in use, the telescopic plates 322 are telescoped as the movable seat 321 moves left and right, thereby achieving the effect of closing the first slide groove, thereby preventing the gravel from jumping out along the first slide groove and affecting the environment during the gravel crushing process.

[0029] See also Figure 5 In this embodiment, the cross-transmission mechanism includes a tensioning assembly, a first pulley 341 and a second pulley 342. The first pulley 341 is fixedly mounted on the end of the first knife roller 315, and the second pulley 342 is fixedly mounted on the end of the second knife roller 314. A belt 340 is cross-tensioned between the tensioning assembly, the first pulley 341 and the second pulley 342. When in use, the cross-transmission of the belt 340 can achieve the effect of the first knife roller 315 and the second knife roller 314 rotating toward each other.

[0030] See also Figure 5In this embodiment, the tensioning assembly includes a tensioning wheel 334, a spring 333 and a mounting plate 330. The mounting plate 330 is fixedly mounted on the side of the gravel box 310. The mounting plate 330 is provided with a third slide groove 331 and a fourth slide groove 332. The third slide groove 331 and the fourth slide groove 332 are communicated with each other. A second sliding column is slidably connected in the third slide groove 331. The tensioning wheel 334 is rotatably mounted on the second sliding column. A belt 340 is cross-tensioned between the first pulley 341, the second pulley 342 and the tensioning wheel 334. The cam 335 is fixedly connected to the top of the second sliding column 331, and the other end is fixedly connected to the second sliding column, and the spring 333 is always in a compressed state; the top of the second sliding column is fixedly connected to a triangular block 335, and the bottom of the moving seat 321 is fixedly connected to a pushing block 336 matching the triangular block 335, the triangular block 335 and the pushing block 336 are slidably connected in the fourth sliding groove 332, and the inclined surface of the triangular block 335 abuts against the pushing block 336, and when the moving seat 321 slides along the first sliding groove, the pushing block 336 moves with the moving seat 321, and during the movement of the pushing block 336, the bottom of the pushing block 336 is always tightly abutted against the inclined surface of the triangular block 335, so that the belt 340 is always tensioned between the first pulley 341, the second pulley 342 and the tensioning wheel 334, and the transmission effect is not affected by the movement of the second knife roller 314.

[0031] See also Figure 4 In this embodiment, a through hole is opened on one side of the transparent simulation box 2, and a sealing cover 21 is rotatably installed at the through hole. A delivery pipe 23 is detachably connected in the through hole, and a sealing ring matching the through hole is fixedly sleeved on the delivery pipe 23. One end of the delivery pipe 23 away from the transparent simulation box 2 is fixedly connected to a carbon dioxide injection pump 22. When in use, the delivery pipe 23 is inserted into the through hole, and the gap between the delivery pipe 23 and the through hole is sealed with a sealing ring, and then carbon dioxide is delivered to the transparent simulation box 2 through the carbon dioxide injection pump 22, so as to facilitate the smooth progress of the subsequent observation test.

[0032] See also Figure 4 and Figure 6In this embodiment, the sorting mechanism includes a second mounting frame 431 and a second sliding seat 435. The second mounting frame 431 is fixedly mounted on the mounting base 1 and is located on one side of the transparent simulation box 2. A second guide rail 434 and a second motor 432 are fixedly mounted on one side of the second mounting frame 431. A second transmission screw rod 433 is rotatably mounted on one side of the second mounting frame 431. The second motor 432 is transmission-connected to the second transmission screw rod 433. The second sliding seat 435 is slidably connected to the second guide rail 434 and the second transmission screw rod 433. An L-shaped bracket 436 is fixedly connected to the second sliding seat 435. One end of the L-shaped bracket 436 is fixedly connected to a second electric push rod 437. The second electric The movable end of the movable push rod 437 is fixedly connected with a scraper 438 matching the transparent simulation box 2. When the gravel falls into the transparent simulation box 2, the second motor 432 is started, and the output shaft of the second motor 432 drives the second transmission screw 433 to rotate, so that the L-shaped bracket 436 moves along the second sliding seat 435 along the second transmission screw 433. When it moves to the corresponding position above the transparent simulation box 2, the second motor 432 is temporarily turned off and the second electric push rod 437 is started. The scraper 438 is placed in the transparent simulation box 2, and then the second motor 432 is started. The rock layer in the transparent simulation box 2 is scraped according to the actual situation of the rock layer, so as to divide and block different rock layers.

[0033] See also Figure 4 In this embodiment, the axial pressure simulation mechanism includes a first mounting frame 410 and a first sliding seat 413. The first mounting frame 410 is fixedly mounted on the mounting base 1. A first guide rail 412 and a first motor 411 are fixedly mounted on the first mounting frame 410. A first transmission screw is rotatably mounted on the first mounting frame 410. The first motor 411 is transmission-connected to the first transmission screw. The first sliding seat 413 is slidably connected to the first guide rail 412 and the first transmission screw. The bottom four corners of the first sliding seat 413 are fixedly connected to first electric push rods 414. The four first electric push rods The movable ends of 414 are commonly connected to a cover plate that matches the transparent simulation box 2, and sealing strips are fixedly connected to the four sides of the cover plate. When the scraper 438 divides and blocks the rock layer into zones and blocks and roughly determines the position, the first motor 411 is started, and the output shaft of the first motor 411 drives the first transmission screw to rotate, so that the sliding seat moves along the first transmission screw. When it moves to the top of the transparent simulation box 2, the four first electric push rods 414 cooperate with each other to extend and retract, so as to achieve the effect of pressing the cover plate horizontally or obliquely into the transparent simulation box 2, thereby applying pressure to the simulated rock layer in the transparent simulation box 2.

[0034] In this embodiment, the first electric push rod 414, the second electric push rod 437, the third electric push rod 320 and the fourth electric push rod 326 can all be made of hydraulic cylinders, pneumatic cylinders and other devices.

[0035] See also Figure 4In this embodiment, the confining pressure simulation mechanism includes a water pump 441, a water pressure controller 442 and a water pressure monitor 445. One side of the transparent simulation box 2 is fixedly connected to a box body 444, and a plurality of permeable stones are placed in the box body 444. The water pump 441 and the box body 444 are fixedly connected by a connecting water pipe 443. The water pressure controller 442 is fixedly installed on the connecting water pipe 443, and the water pressure monitor 445 is fixedly installed inside the transparent simulation box 2. When in use, the water pump 441, the water pressure controller 442 and the water pressure monitor 445 are started according to the measured environmental confining pressure to control the confining pressure of the rock formation in the transparent simulation box 2 to make it close to the confining pressure in the real environment, thereby making the observation result more accurate; when water passes through the plurality of permeable stones from the box body 444 to the transparent simulation box 2, the water potential is recently flat.

[0036] See also Figure 4 In this embodiment, the temperature simulation mechanism 42 is configured as a plurality of heating rods, which are detachably mounted on the bottom of the transparent simulation box 2 to provide a suitable temperature in the transparent simulation box 2 to simulate the real environment of the rock formation. In actual use, the temperature simulation mechanism 42 can also be configured as some existing heating devices.

[0037] See also Figure 4 In this embodiment, the observation system includes a high-speed camera 51 and a fixed bracket 52. The fixed bracket 52 is installed opposite to one side of the transparent simulation box 2. The high-speed camera 51 is installed on the fixed bracket 52, so that one side of the transparent simulation box 2 is within the monitoring range of the high-speed camera 51, which is convenient for accurately recording the migration path of carbon dioxide.

[0038] A method for preparing a carbon dioxide migration visualization device, the method is applicable to the above-mentioned carbon dioxide migration visualization device, and the steps of the method are as follows: Steps to create simulated rock formations: S1: First, according to the actual distribution of rock layers, plan in advance the distribution of different rock layers and the size of the gravel to be laid in the rock layer; S2: Start the third electric push rod 320, adjust the gap between the first knife roller 315 and the second knife roller 314, so as to tear the gravel of different sizes, and then input the gravel into the transparent simulation box 2 through the guide plate 317; S3: After the first batch of crushed stones are transported to the transparent simulation box 2, the second motor 432 is started to move the scraper 438 to the corresponding position above the transparent simulation box 2, and then the second motor 432 is temporarily closed and the second electric push rod 437 is started to place the scraper 438 in the transparent simulation box 2, and then the second motor 432 is started again to lay the crushed stones in the transparent simulation box 2 in sections and blocks according to the actual rock formation information and the movement of the scraper 438, so that the rock formation is laid obliquely in the transparent simulation box 2; after completion, the above steps are reversed to move the scraper 438 to one side outside the transparent simulation box 2; S4: Start the first motor 411, move the cover plate to the top of the transparent simulation box 2, then turn off the first motor 411 and start the first electric push rod 414. Through the mutual expansion and contraction of the four first electric push rods 414, the cover plate is pressed horizontally or obliquely into the transparent simulation box 2 to apply pressure to the simulated rock formation in the transparent simulation box 2. After completion, reverse the above steps to move the cover plate to one side of the transparent simulation box 2. S5: repeating steps S2-S4 until the rock stratum laying work in the entire transparent simulation box 2 is completed; S6: In the process of repeating steps S2-S4, when the rock layer is laid to the height of the through hole, the sealing cover 21 is opened, and the conveying pipe 23 is inserted into the transparent simulation box 2, and the conveying pipe 23 is installed in advance; Experimental observation steps: P1: Start the heating rod to provide the corresponding temperature for the rock formation in the transparent simulation box 2 to simulate the temperature of the environment in which the rock formation is located; P2: Start the first motor 411, move the cover plate to the top of the transparent simulation box 2, then turn off the first motor 411 and start the first electric push rod 414 to achieve the effect of pressing the cover plate horizontally into the transparent simulation box 2, and apply pressure to the simulated rock formation in the transparent simulation box 2 to simulate the axial pressure of the environment in which the rock formation is located; P3: Start the water pump 441, the water pressure controller 442 and the water pressure monitor to control the confining pressure of the rock formation in the transparent simulation box 2 to simulate the confining pressure of the environment in which the rock formation is located; P4: injecting litmus solution into the transparent simulation box 2 through the sealing cover 21; P5: Start the carbon dioxide injection pump 22, providing a delivery pipeline 23 to inject carbon dioxide into the rock formation within the transparent simulation box 2; P6: When the carbon dioxide injection pump 22 is started, the high-speed camera 51 is simultaneously turned on to record the color change of the litmus solution in the rock formation, that is, to record the migration path of the carbon dioxide in the rock formation and the change pattern of the carbon dioxide migration over time.

[0039] In summary, the present invention adopts the mutual coordination of the rock crushing system, the axial pressure simulation mechanism, the confining pressure simulation mechanism, the temperature simulation mechanism 42 and the sorting mechanism, so that the rock mass in the transparent simulation box 2 is closer to the real rock layer environment, thereby achieving the effect of improving the accuracy of the observation results. Therefore, the present invention effectively overcomes various shortcomings in the prior art.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A device for visualizing carbon dioxide migration, characterized in that: include: A mounting base, wherein a transparent simulation box is arranged on the mounting base; An environmental simulation system, the environmental simulation system comprising an axial pressure simulation mechanism, a confining pressure simulation mechanism, a temperature simulation mechanism and a finishing mechanism, the temperature simulation mechanism being arranged at the bottom of the transparent simulation box, the confining pressure simulation mechanism and the finishing mechanism being arranged at one side of the transparent simulation box, and the axial pressure simulation mechanism being arranged at the top of the transparent simulation box, for simulating a real rock formation environment; An observation system, the observation system comprising a high-speed camera and a fixed bracket, the fixed bracket being installed opposite to one side of the transparent simulation box, the high-speed camera being installed on the fixed bracket, and the high-speed camera being used to observe changes in the transparent simulation box; A control system, wherein the control system is electrically connected to the axial pressure simulation mechanism, the confining pressure simulation mechanism, the temperature simulation mechanism, the sorting mechanism and the observation system.

2. The device for visualizing carbon dioxide migration according to claim 1, characterized in that: A through hole is provided on one side of the transparent simulation box, and a sealing cover is rotatably installed at the through hole; a delivery pipeline is detachably connected to the through hole, and a sealing ring matching the through hole is fixedly sleeved on the delivery pipeline; and one end of the delivery pipeline away from the transparent simulation box is fixedly connected to a carbon dioxide injection pump.

3. The device for visualizing carbon dioxide migration according to claim 1, characterized in that: The confining pressure simulation mechanism includes a water pump, a water pressure controller and a water pressure monitor. One side of the transparent simulation box is fixedly connected to a box body, and a plurality of permeable stones are placed in the box body. A connecting water pipe is fixedly connected between the water pump and the box body. The water pressure controller is fixedly installed on the connecting water pipe, and the water pressure monitor is fixedly installed inside the transparent simulation box.

4. The device for visualizing carbon dioxide migration according to claim 1, characterized in that: The axial pressure simulation mechanism includes a first mounting frame and a first sliding seat, the first mounting frame is fixedly mounted on the mounting base, the first mounting frame is fixedly mounted with a first guide rail and a first motor, the first mounting frame is rotatably mounted with a first transmission screw, the first motor is transmission-connected to the first transmission screw, the first sliding seat is slidably connected to the first guide rail and the first transmission screw, the four bottom corners of the first sliding seat are fixedly connected with first electric push rods, the movable ends of the four first electric push rods are commonly connected with a cover plate matching the transparent simulation box, and sealing strips are fixedly connected on all four sides of the cover plate.

5. The device for visualizing carbon dioxide migration according to claim 1, characterized in that: The tidying mechanism includes a second mounting frame and a second sliding seat, the second mounting frame is fixedly mounted on the mounting base and is located on one side of the transparent simulation box, a second guide rail and a second motor are fixedly mounted on one side of the second mounting frame, a second transmission screw is rotatably mounted on one side of the second mounting frame, the second motor is transmission-connected to the second transmission screw, the second sliding seat is slidably connected to the second guide rail and the second transmission screw, an L-shaped bracket is fixedly connected to the second sliding seat, one end of the L-shaped bracket is fixedly connected to a second electric push rod, and a movable end of the second electric push rod is fixedly connected to a scraper matching the transparent simulation box.

6. The device for visualizing carbon dioxide migration according to claim 1, characterized in that: It also includes a stone crushing system, which includes a stone crushing mechanism, an adjusting mechanism and a cross-transmission mechanism. The stone crushing mechanism is arranged on one side of the transparent simulation box, and the adjusting mechanism and the cross-transmission mechanism are both arranged on the stone crushing mechanism. The adjusting mechanism is used to adjust the degree of stone crushing; the stone crushing mechanism, the adjusting mechanism and the cross-transmission mechanism are all electrically connected to the control system.

7. The device for visualizing carbon dioxide migration according to claim 6, characterized in that: The stone crushing mechanism includes a stone crushing box, a first knife roller and a second knife roller, the first knife roller rotates in the stone crushing box, the adjustment mechanism is arranged on the stone crushing box, the second knife roller is rotatably installed on the adjustment mechanism, and the first knife roller and the second knife roller are located in the same horizontal plane; a third motor is fixedly installed on one side of the stone crushing box, the third motor is transmission-connected with one end of the first knife roller, and the cross transmission mechanism is installed between the first knife roller and the second knife roller; a guide plate is obliquely installed in the stone crushing box, an outlet is opened on one side of the stone crushing box, and the end of the guide plate passes through the outlet and presses against the top of the transparent simulation box.

8. The device for visualizing carbon dioxide migration according to claim 7, characterized in that: The adjusting mechanism comprises a third electric push rod and a moving seat, first slide grooves are provided on both sides of the crushing box, the moving seat is slidably connected in the first slide grooves, and the second knife roller is rotatably installed between the two moving seats; the third electric push rod is fixedly installed on the crushing box, and the movable end is fixedly connected to the moving seat; a second slide groove is provided on the side of the crushing box close to the second knife roller, and a fourth electric push rod is fixedly installed on the side of the crushing box located at the second slide groove, a sliding block is slidably connected in the second slide groove, and one end of the sliding block close to the second knife roller is fixedly connected to an inclined block, and the other end is fixedly connected to the movable end of the fourth electric push rod.

9. The device for visualizing carbon dioxide migration according to claim 8, characterized in that: The cross transmission mechanism comprises a tensioning assembly, a first pulley and a second pulley, the first pulley is fixedly mounted on the end portion of the first knife roller, and the second pulley is fixedly mounted on the end portion of the second knife roller; the tensioning assembly comprises a tensioning wheel, a spring and a mounting plate, the mounting plate is fixedly mounted on the side of the crushing box, and a third slide groove and a fourth slide groove are provided on the mounting plate, and the third slide groove and the fourth slide groove are communicated; a second sliding column is slidably connected in the third slide groove, and the tensioning wheel is rotatably mounted on the second sliding column, and a belt is cross-tensioned between the first pulley, the second pulley and the tensioning wheel; one end of the spring is fixedly connected to the bottom of the third slide groove, and the other end is fixedly connected to the second sliding column; a triangular block is fixedly connected to the top of the second sliding column, and a pushing block matching the triangular block is fixedly connected to the bottom of the moving seat, and the triangular block and the pushing block are slidably connected in the fourth slide groove, and the triangular block and the pushing block abut against each other.

10. A method for preparing a heterogeneous rock formation, the method being applicable to a device for visualizing carbon dioxide migration as claimed in any one of claims 1 to 9, characterized in that: The steps include: Steps to create simulated rock formations: S1: First, according to the actual distribution of rock layers, plan in advance the distribution of different rock layers and the size of the gravel to be laid in the rock layer; S2: Start the third electric push rod, adjust the gap between the first knife roller and the second knife roller to tear out gravel of different sizes, and then input the gravel into the transparent simulation box through the guide plate; S3: After the first batch of crushed stones is transported to the transparent simulation box, the second motor is started to move the scraper to the corresponding position above the transparent simulation box, and then the second motor is temporarily turned off and the second electric push rod is started to place the scraper in the transparent simulation box, and then the second motor is started again to lay the crushed stones in the transparent simulation box in sections and blocks according to the actual rock formation information and the movement of the scraper, so that the rock formation is laid obliquely in the transparent simulation box; after completion, the above steps are reversed to move the scraper to one side outside the transparent simulation box; S4: Start the first motor, move the cover plate to the top of the transparent simulation box, then turn off the first motor and start the first electric push rods. The four first electric push rods cooperate with each other to extend and retract, so as to achieve the effect of pressing the cover plate horizontally or obliquely into the transparent simulation box, and apply pressure to the simulated rock formation in the transparent simulation box. After completion, reverse the above steps to move the cover plate to one side of the transparent simulation box. S5: Repeat steps S2-S4 until the rock strata laying work in the entire transparent simulation box is completed; S6: In the process of repeating steps S2-S4, when the rock layer is laid to the height of the through hole, the sealing cover is opened, and the conveying pipeline is inserted into the transparent simulation box, and the conveying pipeline is installed in advance; Experimental observation steps: P1: Start the heating rod to provide the corresponding temperature for the rock formation in the transparent simulation box to simulate the temperature of the environment in which the rock formation is located; P2: Start the first motor, move the cover plate to the top of the transparent simulation box, then turn off the first motor and start the first electric push rod to achieve the effect of pressing the cover plate horizontally into the transparent simulation box, exerting pressure on the simulated rock formation in the transparent simulation box to simulate the axial pressure of the environment in which the rock formation is located; P3: Start the water pump, water pressure controller and water pressure monitor to control the confining pressure of the rock formation in the transparent simulation box to simulate the confining pressure of the environment in which the rock formation is located; P4: inject litmus solution into the transparent simulation box through the sealing cover; P5: Start the carbon dioxide injection pump and provide a delivery pipeline to inject carbon dioxide into the rock formation in the transparent simulation box; P6: When the CO2 injection pump is started, a high-speed camera is turned on at the same time to record the color change of the litmus solution in the rock formation, that is, to record the migration path of CO2 in the rock formation and the change pattern of CO2 migration over time.

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