Deep ground space seepage control structure fluid migration simulation and fine monitoring experiment platform

Abstract

The invention relates to the technical field of deep ground science and engineering, and provides a deep ground space seepage control structure fluid migration simulation and fine monitoring experiment platform which comprises a fixed base, a simulation box is installed at the top end of the fixed base, a constant-pressure overflow valve is installed on the outer side wall of the simulation box, and a connecting sliding rod is fixedly connected to the top end of the fixed base. Two connecting sliding grooves are formed in two side walls of the bottom end of the simulation box; the simulation mechanism is arranged on the inner side wall of the simulation box, the simulation mechanism comprises a detection electrode plate, and the detection electrode plate is installed on the inner side wall of the simulation box; by optimizing model design, a mechanical device is used for simulating a stratum evolution rule and a fluid migration process of a deep space seepage control structure, so that the span from semi-quantitative analysis to quantitative analysis is realized. And in combination with high-precision geophysical detection technologies such as a high-density electrical method and the like, real-time monitoring and quantitative characterization of the fluid migration process are realized, and the accuracy and reliability of research are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of deep earth science and engineering technology, and in particular to a deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform. Background Art

[0002] In the process of exploration, development and storage of deep-earth energy materials, the precise detection of the seepage-controlling structure and the fluid migration mechanism inside it is a crucial and extremely challenging scientific issue. As an important geological structure in the underground space, the fluid migration law inside the seepage-controlling structure not only directly affects the storage and migration of energy materials, but also affects the stability and safety of underground engineering. However, due to the complexity and inability to directly observe the deep-earth space environment, the fluid migration process inside the seepage-controlling structure is difficult to directly measure and accurately describe, which has become one of the bottlenecks restricting the development of deep-earth energy storage technology.

[0003] Traditional research methods mainly rely on theoretical analysis and numerical simulation, but due to the diversity and complexity of underground geological conditions, the accuracy and reliability of these methods are often limited. Therefore, it is particularly urgent to develop an experimental platform that can simulate the migration process of deep-space seepage-controlled structural fluids and achieve high-precision monitoring.

[0004] In recent years, with the development of similar physical simulation technology and the advancement of geophysical exploration technology, the use of similar physical models to simulate the evolution of strata and the process of fluid migration has become a new research method. This method simulates the deformation and fluid migration process of the permeability-controlled structure in the geological history by constructing a physical model similar to the actual geological conditions, applying surrounding rock pressure and fluid injection and other conditions. At the same time, combined with geophysical exploration technologies such as high-density electrical methods, real-time monitoring and quantitative analysis of the fluid migration process can be achieved, providing strong support for the study of the fluid migration mechanism of the permeability-controlled structure in deep space.

[0005] However, the existing simulation experiment platform still has many shortcomings in terms of model design, fluid injection and control system, and fluid migration monitoring system. For example, model design often fails to accurately restore the characteristics of the seepage-controlling structure under actual geological conditions; the fluid injection and control system lacks flexibility in controlling the water supply and rate; the fluid migration monitoring system has limitations in monitoring accuracy and coverage, etc. These problems limit the application effect of the simulation experiment platform in the study of fluid migration mechanism of deep-earth space seepage-controlling structures.

[0006] To this end, those skilled in the art have proposed a deep-earth space controlled seepage structural fluid migration simulation and precision monitoring experimental platform to solve the problems raised by the background technology. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides an experimental platform for simulating and finely monitoring fluid migration in deep earth space controlled seepage structures. By optimizing model design, improving fluid injection and control systems, and enhancing the accuracy and coverage of fluid migration monitoring systems, high-precision simulation and real-time monitoring of fluid migration processes in deep earth space controlled seepage structures can be achieved.

[0008] The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform comprises a fixed base, a simulation box is installed on the top of the fixed base, a constant pressure relief valve is installed on the outer wall of the simulation box, a connecting slide rod is fixedly connected to the top of the fixed base, and two connecting slide grooves are provided on the two side walls of the bottom of the simulation box;

[0009] A simulation mechanism, the simulation mechanism is arranged on the inner side wall of the simulation box, the simulation mechanism includes a detection electrode sheet, the detection electrode sheet is installed on the inner side wall of the simulation box, the inner side wall of the simulation box is fixedly connected with a permeation control structure template 1, and the outer side wall of the permeation control structure template 1 is also installed with a detection electrode sheet;

[0010] A pushing mechanism, wherein the pushing mechanism is arranged on two side walls of the fixed base;

[0011] A spraying mechanism is arranged at the bottom end of the inner side wall of the fixed base.

[0012] Preferably, a permeation control structure template 2 is installed on the inner wall of the permeation control structure template 1, a permeation control structure template 3 is installed on the inner wall of the permeation control structure template 2, and detection electrode sheets are arranged inside the permeation control structure template 2, the permeation control structure template 3 and the permeation control structure template 1.

[0013] Preferably, the pushing mechanism includes a servo, which is installed on a side wall at the top of the fixed base. Two sets of connecting lines are arranged at both ends of the servo, and two sets of telescopic cylinders are installed on the two side walls at the top of the fixed base. The two sets of telescopic cylinders are installed together with the two sets of connecting lines.

[0014] Preferably, the output end of the telescopic cylinder is fixedly connected with a telescopic rod, and the telescopic rods are in two groups and installed on two side walls of the simulation box. The telescopic cylinder pushes the simulation box through the telescopic rod.

[0015] Preferably, the spraying mechanism includes a pressure pump, which is installed on the top of a fixed base. A flow tube is installed on the outer wall of the pressure pump, a fluid infiltration controller is installed in the middle of the flow tube, and the end of the flow tube away from the pressure pump is also installed on the outer wall of the simulation box.

[0016] Preferably, a water distribution trough is provided on the inner side wall of the simulation box, the inlet of the water distribution trough is connected to the output end of the flow tube, and a plurality of groups of upper water troughs are provided on the inner side wall of the simulation box, and the plurality of groups of upper water troughs are interconnected with the water distribution troughs.

[0017] Preferably, a plurality of spray heads are installed at the bottom end of the inner side wall of the simulation box. The spray heads are arranged in a matrix and installed at the bottom end of the inner side wall of the simulation box. The inner side wall of the spray head is installed with a plurality of sets of one-way valve flaps.

[0018] Preferably, the tops of the multiple groups of one-way valve flaps are made of soft silicone, and the bottoms of the multiple groups of one-way valve flaps are made of hard plastic, which allows the one-way valve flaps to open in one direction.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. High-precision model design: The present invention can more accurately restore the characteristics of the seepage control structure under actual geological conditions through the design of multi-layer nested seepage control structure templates (seepage control structure template 1, seepage control structure template 2, and seepage control structure template 3). Combined with different proportions of sand, gypsum, lime and other materials filling, as well as the addition of conductive particles, the accuracy and conductivity of the model are further improved, providing a solid foundation for subsequent fluid migration monitoring.

[0021] 2. Flexible fluid injection and control system: By integrating components such as a pressure pump, a flow tube, and a fluid infiltration controller, the present invention achieves precise control of the fluid supply volume and rate. This system not only meets the different requirements of the experiment for fluid injection conditions, but also improves the repeatability of the experiment and the reliability of the data.

[0022] 3. Efficient fluid migration monitoring system: The built-in high-density electrical monitoring system, combined with the detection electrodes installed in the multi-layer seepage control structure template, can monitor the migration path and distribution of fluids in the seepage control structure in real time. This system has the advantages of high precision and wide coverage, which significantly improves the accuracy and credibility of monitoring data.

[0023] 4. Dynamic simulation and real-time monitoring capabilities: The propulsion mechanism realizes dynamic simulation of geological conditions in the simulation box through the telescopic cylinder driven by the servo machine, and can simulate the evolution of strata under different geological stress conditions. At the same time, the monitoring system can work continuously, dynamically monitor the fluid migration process, capture transient changes and complex behaviors, and provide valuable real-time data support for scientific researchers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 For the present invention Figure 1Schematic diagram of the cross-sectional structure of the simulation box;

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the top view structure in ;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the cross-sectional structure of the middle control seepage structure template 1;

[0028] Figure 5 For the present invention Figure 1 The bottom cross-sectional structure diagram of the simulation box;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure of the simulation box;

[0030] Figure 7 For the present invention Figure 6 The structural diagram of the middle sprinkler head;

[0031] Figure 8 It is a schematic diagram of the layout of the seepage control structure template and the connection of the wires used in the model monitoring system of the present invention.

[0032] In the figure: 1. fixed base; 11. constant pressure relief valve; 2. simulation box; 21. connecting slide; 22. connecting slide rod; 23. detection electrode; 24. seepage control structure template 1; 25. seepage control structure template 2; 26. seepage control structure template 3; 3. pressure pump; 31. fluid infiltration controller; 32. flow tube; 33. water distribution tank; 34. upper water tank; 35. spray head; 36. one-way valve disc; 4. servo motor; 41. connecting line; 42. telescopic cylinder; 43. telescopic rod. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0034] As attached Figure 1 To Attachment Figure 8 As shown:

[0035] Embodiment 1: The present invention provides a deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform, comprising a fixed base 1, a simulation box 2 is installed on the top of the fixed base 1, a constant pressure relief valve 11 is installed on the outer wall of the simulation box 2, a connecting slide rod 22 is fixedly connected to the top of the fixed base 1, and two connecting slide grooves 21 are provided on the two side walls of the bottom of the simulation box 2;

[0036] A simulation mechanism, the simulation mechanism is arranged on the inner wall of the simulation box 2, the simulation mechanism comprises a detection electrode sheet 23, the detection electrode sheet 23 is installed on the inner wall of the simulation box 2, the inner wall of the simulation box 2 is fixedly connected with a permeation control structure template 1 24, and the outer wall of the permeation control structure template 1 24 is also installed with a detection electrode sheet 23;

[0037] A pushing mechanism, which is arranged on two side walls of the fixed base 1;

[0038] A spraying mechanism is arranged at the bottom end of the inner wall of the fixed base 1, a seepage control structure template 2 25 is installed on the inner wall of the seepage control structure template 1 24, a seepage control structure template 3 26 is arranged on the inner wall of the seepage control structure template 2 25, and a detection electrode sheet 23 is arranged inside the seepage control structure template 2 25, the seepage control structure template 3 26 and the seepage control structure template 1 24.

[0039] Specifically, the inside of the seepage control structure template 24 is filled and poured with materials such as sand, gypsum, lime, etc. in different proportions to form a control structure system with different permeability coefficients. The outer periphery of the template is filled with rubber plastic waterproof materials (such as clay), and conductive particles (such as graphite) are added during the production process to improve the conductivity of the material, which is convenient for subsequent high-density electrical monitoring.

[0040] The layout and principle of the seepage control structure template-24: First, the seepage control structure template-24 is implanted in the similar material of the experimental model box. The diameter and length of these seepage control structure templates-24 are specific, and they are laid out according to a certain spacing and layout. Usually, 64-channel or 96-channel seepage control structure template-24 are used to improve the monitoring accuracy and coverage. When the fluid is injected into the model box, the fluid will migrate along the seepage control structure. Due to the difference in resistivity between the fluid and the surrounding medium, the fluid migration will cause the change of resistivity inside the model box. Through the high-density electrical instrument, each seepage control structure template-24 is connected to form a seepage control structure template-24 array. The instrument will apply current or voltage to the seepage control structure template-24 array and measure the resulting electric field or potential difference. These measurement data reflect the distribution of resistivity inside the model box, and the collected resistivity data will be transmitted to the computer for processing and analysis. Through specific algorithms and software, resistivity data can be converted into images or three-dimensional models to intuitively display the migration path and distribution of fluids in the seepage-controlling structure. Based on the processed data, researchers can monitor the process of fluid migration in real time and evaluate the permeability of the seepage-controlling structure and the fluid migration mechanism. These data can also be used to verify and improve the theoretical model of fluid migration in the seepage-controlling structure, and provide theoretical guidance and technical support for the sealing and storage of deep-earth energy materials. During the experiment, the seepage-controlling structure template-24 monitoring system can work continuously and dynamically monitor the fluid migration process. This helps to capture transient changes and complex behaviors in the fluid migration process and improve the accuracy and reliability of monitoring.

[0041] The pushing mechanism includes a servo 4, which is installed on a side wall of the top of the fixed base 1. Two groups of connecting lines 41 are set at both ends of the servo 4. Two groups of telescopic cylinders 42 are installed on the two side walls of the top of the fixed base 1. The two groups of telescopic cylinders 42 are installed together with the two groups of connecting lines 41. The output end of the telescopic cylinder 42 is fixedly connected with a telescopic rod 43. The telescopic rod 43 is in two groups and is installed on the two side walls of the simulation box 2. The telescopic cylinder 42 pushes the simulation box 2 through the telescopic rod 43.

[0042] Specifically, the model driving system consists of two telescopic cylinders 42 and telescopic rods 43 on the left and right sides. Each telescopic rod 43 can provide a maximum loading force of 10,000 N and has a fine control capability of a minimum strain rate of 0.0001 mm / s. These telescopic rods 43 are installed on both sides of the experimental simulation box 2, and the precise application of the model boundary conditions is achieved through a computer-controlled servo system.

[0043] The spraying mechanism includes a pressure pump 3, which is installed on the top of the fixed base 1. A flow tube 32 is installed on the outer wall of the pressure pump 3. A fluid infiltration controller 31 is installed in the middle of the flow tube 32. The end of the flow tube 32 away from the pressure pump 3 is also installed on the outer wall of the simulation box 2. A water distribution trough 33 is opened on the inner wall of the simulation box 2. The inlet of the water distribution trough 33 is connected to the output end of the flow tube 32. The inner wall of the simulation box 2 A plurality of upper water tanks 34 are provided, and the plurality of upper water tanks 34 are interconnected with the water distribution tanks 33. A plurality of spray heads 35 are installed at the bottom end of the inner wall of the simulation box 2. The spray heads 35 are arranged in a matrix shape and installed at the bottom end of the inner wall of the simulation box 2. A plurality of one-way valve flaps 36 are installed on the inner wall of the spray heads 35. The tops of the plurality of one-way valve flaps 36 are made of soft silicone, and the bottoms of the plurality of one-way valve flaps 36 are made of hard plastic, which allows the one-way valve flaps 36 to be opened in one direction.

[0044] Specifically, the fluid infiltration system realizes the injection of fluid through the specific design of the bottom of the simulation box 2. A plurality of water distribution grooves 33 are reserved at the bottom of the simulation box 2 for installing water pipes and a water pump control system. These water pipes are connected to the water outlets and are distributed at different positions at the bottom of the simulation box 2 to realize the precise control of the fluid injection position. By adjusting the working state of the booster pump 3, the water supply volume and water supply rate can be controlled to meet the different requirements of the experiment for fluid injection conditions. After the prefabrication of the structural surface is completed, the mold can be removed and then the entire model box can be filled with graphite mastic.

[0045] As can be seen from the above, when this device is needed, first set up the seepage control structure template 24 according to the experimental needs. According to different casting requirements, three types of seepage control structure templates 24, 25 and 26 can be cast for simulation. Then the pushing mechanism and the spraying mechanism can be started respectively, and the pushing mechanism drives the telescopic cylinder 42 to work through the servo 4, so that the telescopic cylinder 42 can carry the telescopic rod 43 to simulate the geology in the simulation box 2. The spraying mechanism is controlled by the pressure pump 3 and the fluid infiltration controller 31, and water is injected into the water distribution tank 33 through the flow tube 32, and sprayed upward through the upper water tank 34 and the spray head 35. The height of the spray head 35 is slightly higher than the bottom of the inner side of the simulation box 2 to avoid blockage. The setting of the one-way valve flap 36 can also further avoid blockage on the outside of the spray head 35.

[0046] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0047] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0051] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Deep space controlled seepage structure fluid migration simulation and fine monitoring experimental platform, characterized by: It comprises a fixed base (1), a simulation box (2) is installed on the top of the fixed base (1), a constant pressure relief valve (11) is installed on the outer wall of the simulation box (2), a connecting slide rod (22) is fixedly connected to the top of the fixed base (1), and two connecting slide grooves (21) are provided on the two side walls of the bottom end of the simulation box (2); A simulation mechanism, the simulation mechanism being arranged on the inner wall of the simulation box (2), the simulation mechanism comprising a detection electrode sheet (23), the detection electrode sheet (23) being installed on the inner wall of the simulation box (2), the inner wall of the simulation box (2) being fixedly connected with a permeation control structure template (24), and the outer wall of the permeation control structure template (24) is also installed with the detection electrode sheet (23); A pushing mechanism, wherein the pushing mechanism is arranged on two side walls of the fixed base (1); A spraying mechanism is arranged at the bottom end of the inner side wall of the fixed base (1).

2. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 1, characterized in that: The inner side wall of the seepage control structure template 1 (24) is installed with a seepage control structure template 2 (25), and the inner side wall of the seepage control structure template 2 (25) is provided with a seepage control structure template 3 (26). The insides of the seepage control structure template 2 (25), the seepage control structure template 3 (26) and the seepage control structure template 1 (24) are all provided with detection electrode sheets (23).

3. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 1, characterized in that: The pushing mechanism comprises a servo (4), the servo (4) being mounted on a side wall at the top of a fixed base (1), two groups of connecting lines (41) being arranged at both ends of the servo (4), two groups of telescopic cylinders (42) being mounted on both side walls at the top of the fixed base (1), and the two groups of telescopic cylinders (42) and the two groups of connecting lines (41) being mounted together.

4. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 3, characterized in that: The output end of the telescopic cylinder (42) is fixedly connected to a telescopic rod (43). The telescopic rods (43) are in two groups and are installed on two side walls of the simulation box (2). The telescopic cylinder (42) pushes the simulation box (2) through the telescopic rods (43).

5. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 1, characterized in that: The spraying mechanism comprises a pressure pump (3), wherein the pressure pump (3) is mounted on the top of a fixed base (1), a flow tube (32) is mounted on the outer wall of the pressure pump (3), a fluid infiltration controller (31) is mounted in the middle of the flow tube (32), and an end of the flow tube (32) away from the pressure pump (3) is also mounted on the outer wall of the simulation box (2).

6. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 1, characterized in that: The inner wall of the simulation box (2) is provided with a water distribution trough (33), the inlet of which is connected to the output end of the flow tube (32). The inner wall of the simulation box (2) is also provided with a plurality of groups of upper water troughs (34), and the plurality of groups of upper water troughs (34) are interconnected with the water distribution troughs (33).

7. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 6, characterized in that: A plurality of spray heads (35) are also installed at the bottom end of the inner wall of the simulation box (2). The spray heads (35) are arranged in a matrix at the bottom end of the inner wall of the simulation box (2). The inner wall of the spray heads (35) is installed with a plurality of sets of one-way valve flaps (36).

8. The deep earth space controlled seepage structure fluid migration simulation and fine monitoring experimental platform as claimed in claim 7, characterized in that: The tops of the multiple groups of one-way valve flaps (36) are made of soft silicone, and the bottoms of the multiple groups of one-way valve flaps (36) are made of hard plastic, which allows the one-way valve flaps (36) to open in one direction.

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