Heterogeneous reservoir microorganism mineralization simulation experiment device

Abstract

The utility model relates to the technical field of microorganism mineralization simulation experiments, in particular to a heterogeneous reservoir microorganism mineralization simulation experiment device which comprises an experiment box, and a sealing plate is installed in the experiment box. The heterogeneous layer simulation assembly is mounted in the experiment box, and the surface of the heterogeneous layer simulation assembly is coated with a crude oil matrix; the compression assembly is installed on the lower side of the sealing plate, and the output end of the compression assembly abuts against the upper end of the heterogeneous layer simulation assembly; the experimental environment control assembly is mounted on the experimental box and is used for controlling a bacterial strain environment in the experimental box; the monitoring assembly is arranged on the outer side of the experiment box and is used for monitoring the strain condition in the experiment box. The device disclosed by the utility model is beneficial to simulating the mineralization process of microorganisms in a heterogeneous layer, and provides a more powerful and effective microbial technical means for efficient development and reservoir protection of oil and gas reservoirs.

Description

Technical Field

[0001] The utility model relates to the technical field of microbial mineralization simulation experiments, in particular to a heterogeneous reservoir microbial mineralization simulation experiment device. Background Art

[0002] Heterogeneous reservoir microorganisms refer to microbial communities that survive and function in oil and gas reservoir environments with complex pore structures and large permeability differences. They include bacteria, archaea, fungi, and protists. Under extreme conditions, the microbial communities affect crude oil fluidity, reservoir physical properties, and fluid chemical properties through metabolic activities, which is of great significance for improving crude oil recovery and reservoir protection.

[0003] Experimental simulation of microbial mineralization in heterogeneous reservoirs is a core research tool at the intersection of petroleum engineering, environmental geology, and microbial geotechnical technology. Its significance lies not only in resolving technical bottlenecks in heterogeneous reservoir exploitation but also in providing scientific support for theoretical improvement and engineering application of microbial mineralization technology. For example, prior application No. CN221777893U discloses a test device for microbial-induced mineralization in anaerobic environments. While this device can simulate microbial mineralization in the absence of oxygen, it cannot simulate the heterogeneous layers in oil and gas reservoirs, limiting its application in studying the interaction between microorganisms and heterogeneous reservoirs and improving oil and gas recovery.

[0004] Therefore, those skilled in the art are committed to developing a heterogeneous reservoir microbial mineralization simulation experimental device, which is conducive to simulating the mineralization process of microorganisms in heterogeneous layers and providing more powerful and effective microbial technology means for the efficient development of oil and gas reservoirs and reservoir protection. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a heterogeneous reservoir microbial mineralization simulation experimental device, which is conducive to simulating the mineralization process of microorganisms in heterogeneous layers and providing more powerful and effective microbial technical means for the efficient development of oil and gas reservoirs and reservoir protection.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A heterogeneous reservoir microbial mineralization simulation experimental device comprises an experimental box, wherein a sealing plate is installed in the experimental box;

[0008] a heterogeneous layer simulation component, the heterogeneous layer simulation component being installed in the experimental box, and the surface of the heterogeneous layer simulation component being coated with a crude oil matrix;

[0009] A compression assembly, wherein the compression assembly is mounted on the lower side of the sealing plate, and an output end of the compression assembly abuts against an upper end of the heterogeneous layer simulation assembly;

[0010] An experimental environment control component, which is installed on the experimental box and is used to control the strain environment in the experimental box;

[0011] A monitoring component is arranged outside the experimental box and is used to monitor the strain conditions in the experimental box.

[0012] The beneficial effects of adopting the above scheme are as follows: the heterogeneous reservoir microbial mineralization simulation experimental device forms a relatively complete simulation system by setting up an experimental box, a heterogeneous layer simulation component, a compression component, an experimental environment control component and a monitoring component;

[0013] The experimental chamber provides a relatively independent and controllable space for the entire simulation experiment. The surface of the heterogeneous layer simulation component is coated with crude oil matrix, which can preliminarily simulate a reservoir environment with certain heterogeneous characteristics, allowing microorganisms to have a similar attachment and action carrier as the real one.

[0014] The compression component can apply pressure to the heterogeneous layer simulation component to simulate the stress conditions of the underground reservoir;

[0015] The experimental environment control component can regulate the strain environment in the experimental chamber to create environmental conditions suitable for microbial growth and mineralization;

[0016] The monitoring component facilitates real-time monitoring of the relevant conditions of the strains in the experimental box. Overall, it is conducive to conducting more systematic and targeted simulation experiments on heterogeneous reservoir microbial mineralization, providing a basic experimental platform for related research and promoting the research progress of microbial mineralization technology in fields such as oil and gas recovery.

[0017] On the basis of the above technical solution, the present invention can also be improved as follows.

[0018] Furthermore, the heterogeneous layer simulation component includes fracture blocks and hydrophobic layers, the fracture blocks and the hydrophobic layers are arranged alternately, and the surfaces of the fracture blocks and the hydrophobic layers are coated with crude oil matrix.

[0019] The beneficial effect of adopting the above-mentioned further scheme is that the staggered fracture blocks and hydrophobic layers can better show the heterogeneous conditions such as different permeabilities and pore structures in the reservoir, making the mineralization process of microorganisms therein closer to the actual reservoir environment, thereby making the simulation experimental results more realistic and valuable for reference, which is helpful to deeply explore the interaction mechanism between microbial mineralization and heterogeneous reservoirs, and provide more accurate simulation conditions for research on improving oil and gas recovery rates.

[0020] Furthermore, both ends of the crack block are equipped with fixed plates, the fixed plates are inserted into the guide grooves on the guide blocks, and the guide blocks are installed on the side walls of the experimental box;

[0021] An elastic member is also installed between two adjacent fixing plates.

[0022] The beneficial effect of adopting the above further solution is that the cooperation between the guide groove and the fixing plate can limit the position and movement direction of the crack block, so that when it is subjected to the force of the compression component, it can deform or displace according to the predetermined direction and rules;

[0023] Multiple elastic parts are gradually superimposed so that the extrusion pressure on the bottom layer is higher than that on the top layer, thereby simulating the microbial mineralization effect between different pressure levels.

[0024] Furthermore, the compression assembly includes a servo motor, which is installed on the lower side of the sealing plate, and a first synchronous wheel is installed on the output end of the servo motor, and the first synchronous wheel is installed with a second synchronous wheel through a synchronous belt, and a screw bearing is installed in the second synchronous wheel, and a rotating screw that cooperates with the screw bearing is provided in the screw bearing, one end of the rotating screw extends into the experimental box and is rotatably connected to a support seat, and the support seat abuts against the upper end of the heterogeneous layer simulation assembly;

[0025] The second synchronous wheel is mounted on a mounting plate via a mounting seat, and the mounting plate is located at the lower side of the sealing plate.

[0026] The beneficial effect of adopting the above-mentioned further scheme is: the servo motor is used as the power source to drive the rotating screw to rotate through the first synchronous wheel, synchronous belt, second synchronous wheel and other transmission components, thereby causing the screw bearing cooperating therewith to produce linear motion, and finally transmitting the force to the support seat, thereby realizing the pressure applied to the upper end of the non-homogeneous layer simulation component to simulate the hierarchical force.

[0027] Furthermore, the experimental environment control component includes an inert gas tank, which is connected to the experimental box through a connecting pipe, a pressure regulating valve is installed on the connecting pipe, an exhaust pipe is installed on the experimental box, and an exhaust valve is installed on the exhaust pipe.

[0028] The beneficial effects of adopting the above further scheme are: introducing a sufficient amount of inert gas into the experimental chamber to simulate the mineralization of microorganisms under anaerobic conditions, and the high-pressure inert gas can also simulate the mineralization of microorganisms in a heterogeneous layer under high-pressure environment;

[0029] The exhaust pipe and exhaust valve are used to discharge the inert gas in the experimental chamber so that the pressure of the experimental chamber is maintained within the appropriate experimental range.

[0030] Furthermore, a thermal semiconductor device, a temperature sensor, a gas pressure sensor and a liquid level sensor are also installed in the experimental box.

[0031] The beneficial effect of adopting the above further scheme is: adding thermal semiconductor devices, temperature sensors, gas pressure sensors and liquid level sensors in the experimental box can fully and real-time monitor and control the environmental parameters in the experimental box to simulate high-pressure, oxygen-free and high-temperature environments.

[0032] Furthermore, the lower side of the experimental box is connected to a circulation pump through a delivery pipe, and the output end of the circulation pump is connected to a salinity control component and a discharge pipe in sequence, and the discharge pipe extends to the middle of the experimental box.

[0033] The beneficial effects of adopting the above further solution are: it is conducive to ensuring the dynamic circulation and salinity stability of the fluid in the experimental box, and at the same time, the mineralization of microorganisms in a high-salt environment can be simulated through the salinity control component.

[0034] Furthermore, the monitoring component includes a laser scanner and a high-definition camera, and the laser scanner and the high-definition camera are installed on the outer wall of the experimental box.

[0035] The beneficial effects of adopting the above-mentioned further scheme are as follows: the laser scanner can obtain the three-dimensional structural information of the surface of objects in the experimental chamber and the subtle morphological changes produced during the microbial mineralization process, providing intuitive and detailed image data for studying the changes in heterogeneous reservoir structure caused by microbial mineralization;

[0036] High-definition cameras can record the overall situation of the experiment in real time, making it convenient to observe macroscopic phenomena such as microbial growth status and fluid flow. The combination of the two can enrich monitoring methods and provide multi-dimensional monitoring data, which will facilitate scientific researchers to comprehensively and in-depth analyze various phenomena and changes in the microbial mineralization simulation experiment, discover problems in a timely manner and adjust the experimental plan.

[0037] Furthermore, the experimental box and the sealing plate are both made of highly light-transmitting materials, and the surfaces of the experimental box and the sealing plate are both installed with electrochromic functional layers, and a lighting component is also installed on the upper end of the experimental box.

[0038] The beneficial effects of adopting the above-mentioned further scheme are as follows: the experimental box and the surface of the sealing plate are both installed with an electrochromic functional layer, which adjusts the amount of light entering in a timely manner according to the experimental requirements to avoid the adverse effects of strong light on microorganisms or achieves a shading effect when shading is required, thereby increasing the flexibility of experimental environment control. In addition, a lighting component is installed at the upper end of the experimental box to provide additional light source supplements when necessary, further optimizing the lighting environment in the experimental box, providing strong support for conducting microbial mineralization simulation experiments that have certain requirements for light, and expanding the types of microorganisms and experimental conditions that the device can be used for. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1This is a schematic diagram of the planar structure of the heterogeneous reservoir microbial mineralization simulation experimental device in the present utility model;

[0040] Figure 2 This is a schematic diagram of the planar structure of the compression component in the present utility model.

[0041] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0042] 1. Experimental box; 2. Sealing plate; 3. Heterogeneous layer simulation component; 4. Compression component; 5. Experimental environment control component; 6. Monitoring component; 7. Fracture block; 8. Hydrophobic layer; 9. Fixing plate; 10. Guide block; 11. Elastic part; 12. Servo motor; 13. Synchronous belt; 14. Second synchronous pulley; 15. Rotating screw; 16. Support seat; 17. Mounting plate; 18. Inert gas tank; 19. Connecting pipe; 20. Exhaust pipe; 21. Exhaust valve; 22. Thermal semiconductor device; 23. Temperature sensor; 24. Liquid level sensor; 25. Gas pressure sensor; 26. Delivery pipe; 27. Circulation pump; 28. Salinity control component; 29. ​​Discharge pipe; 30. Laser scanner; 31. High-definition camera; 32. First synchronous pulley; 33. Lighting component. DETAILED DESCRIPTION

[0043] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, “a plurality of” means at least two, such as two, three, etc., unless otherwise clearly defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] like Figure 1 、 Figure 2 As shown, a heterogeneous reservoir microbial mineralization simulation experimental device is designed to provide an accurate, comprehensive and controllable experimental platform for simulating the microbial mineralization process in heterogeneous reservoirs, contributing effective microbial technology means to the efficient development of oil and gas reservoirs and reservoir protection. Specifically, it includes an experimental box 1, in which a sealing plate 2 is installed;

[0048] A heterogeneous layer simulation component 3 is installed in the experimental box 1, and the surface of the heterogeneous layer simulation component 3 is coated with a crude oil matrix;

[0049] The compression component 4 is installed on the lower side of the sealing plate 2, and the output end of the compression component 4 abuts against the upper end of the heterogeneous layer simulation component 3;

[0050] An experimental environment control component 5 is installed on the experimental box 1 and is used to control the strain environment in the experimental box 1;

[0051] The monitoring component 6 is arranged outside the experimental box 1 and is used to monitor the strain conditions in the experimental box 1 .

[0052] like Figure 1As shown, in some embodiments, the heterogeneous layer simulation component 3 includes a fracture block 7 and a hydrophobic layer 8. The fracture block 7 can be made of ABS material. The fracture blocks 7 and the hydrophobic layer 8 are arranged in an alternating pattern. When subjected to different degrees of compression, the fracture surfaces have different JRC values ​​(roughness coefficient), simulating high and low permeability zones. The surfaces of the fracture block 7 and the hydrophobic layer 8 are coated with a crude oil matrix, and other nutrient matrices can also be added to enhance microbial activity. Fixed plates 9 are installed at both ends of the fracture block 7. The fixed plates 9 are inserted into guide grooves on the guide blocks 10, which are mounted on the side walls of the experimental chamber 1. The cooperation between the guide grooves and the fixed plates 9 can limit the position and movement direction of the fracture block 7. When subjected to forces such as the compression component 4, the fracture block 7 can deform or displace in the vertical direction. Elastic members 11 are installed between two adjacent fixing plates 9. Multiple elastic members 11 are gradually stacked so that the squeezing force on the bottom layer is higher than that on the top layer, thereby simulating the mineralization of microorganisms between different pressure levels.

[0053] like Figure 1 、 Figure 2 As shown, in another embodiment, the compression assembly 4 includes a servo motor 12, which is installed on the lower side of the sealing plate 2. A first synchronous wheel 32 is installed at the output end of the servo motor 12, and the first synchronous wheel 32 is installed with a second synchronous wheel 14 through a synchronous belt 13. A screw bearing is installed in the second synchronous wheel 14, and a rotating screw 15 that cooperates with the screw bearing is provided in the screw bearing. One end of the rotating screw 15 extends into the experimental box 1 and is rotatably connected to a support seat 16. The support seat 16 abuts against the upper end of the heterogeneous layer simulation assembly 3. The second synchronous wheel 14 is installed on the mounting plate 17 through a mounting seat, and the mounting plate 17 is located on the lower side of the sealing plate 2. When simulating the hierarchical pressure of a heterogeneous reservoir, the servo motor 12 serves as a power source, and drives the screw bearing to rotate through the first synchronous wheel 32, the synchronous belt 13, the second synchronous wheel 14 and other transmission components. The rotation of the screw bearing drives the rotating screw 15 to move up and down and finally transmits the force to the support seat 16, thereby applying pressure to the upper end of the heterogeneous layer simulation component 3, simulating the hierarchical force, and at the same time cooperating with the elastic member 11, so that the hierarchical pressure of the lowest layer is the largest, and the servo motor 12, the first synchronous wheel 32, the second synchronous wheel 14, the rotating screw 15 and the screw bearing are used in combination, which is conducive to accurately adjusting the downward pressure distance of the support seat 16 to adjust the hierarchical force.

[0054] In this embodiment, the experimental environment control assembly 5 includes an inert gas tank 18, which communicates with the interior of the experimental chamber 1 via a connecting pipe 19. Connecting pipe 19 is equipped with a pressure regulating valve for regulating the pressure of the inert gas entering the experimental chamber 1. An exhaust pipe 20 is installed in the experimental chamber 1, and an exhaust valve 21 is installed on the exhaust pipe 20 to discharge the inert gas within the experimental chamber 1 to maintain the pressure within the experimental chamber 1 within a suitable experimental range. Providing a sufficient amount of inert gas into the experimental chamber 1 can simulate the mineralization of microorganisms under anaerobic conditions. High-pressure inert gas can also simulate the mineralization of microorganisms in heterogeneous layers under high-pressure conditions.

[0055] To achieve comprehensive, real-time monitoring and control of environmental parameters within experimental chamber 1, a thermal semiconductor device 22, a temperature sensor 23, a gas pressure sensor 25, and a liquid level sensor 24 are also installed within experimental chamber 1. Thermal semiconductor device 22 regulates the temperature within experimental chamber 1, enabling rapid cooling or heating. Temperature sensor 23 monitors temperature changes within chamber 1 in real time and transmits this data to a control unit (not shown). Gas pressure sensor 25 monitors the gas pressure within chamber 1, while liquid level sensor 24 monitors the liquid level within chamber 1. This allows for simulation of a variety of complex environmental conditions, including high pressure, oxygen depletion, and high temperature.

[0056] The lower side of the experimental box 1 is connected to a circulation pump 27 through a delivery pipe 26. The output end of the circulation pump 27 is connected to a salinity control component 28 and a discharge pipe 29 in sequence. The discharge pipe 29 extends to the middle of the experimental box 1, which is conducive to ensuring the dynamic circulation and salinity stability of the fluid in the experimental box 1. At the same time, salt can be automatically added or removed through the salinity control component 28 to simulate the mineralization of microorganisms in a high-salt environment or a low-salt environment.

[0057] Monitoring assembly 6 includes a laser scanner 30 and a high-definition camera 31, mounted on the outer wall of experimental chamber 1. The laser scanner 30 can capture three-dimensional structural information about the surfaces of objects within chamber 1, as well as subtle morphological changes during microbial mineralization. This provides intuitive and detailed image data for studying the structural changes in heterogeneous reservoirs caused by microbial mineralization. The high-definition camera 31 records the overall experimental process in real time, facilitating the observation of macroscopic phenomena such as microbial growth and fluid flow. The combined use of these two instruments enriches monitoring methods and provides multi-dimensional monitoring data, enabling researchers to comprehensively and in-depth analyze various phenomena and changes during microbial mineralization simulation experiments, identifying issues promptly and adjusting experimental plans.

[0058] Both the experimental chamber 1 and the sealing plate 2 are made of highly light-transmitting materials and are equipped with an electrochromic functional layer. This layer can adjust the amount of light entering according to experimental requirements, preventing the adverse effects of strong light on microorganisms or providing shading when necessary, thereby increasing the flexibility of experimental environment control. Furthermore, a lighting assembly 33 is installed at the top of the experimental chamber 1, providing additional light sources when necessary. This further optimizes the lighting environment within the experimental chamber 1, providing strong support for conducting microbial mineralization simulation experiments that require certain lighting conditions, and expanding the range of microbial species and experimental conditions applicable to the device.

[0059] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heterogeneous reservoir microbial mineralization simulation experimental device, characterized by: The invention comprises an experimental box (1), wherein a sealing plate (2) is installed in the experimental box (1); A heterogeneous layer simulation component (3), the heterogeneous layer simulation component (3) is installed in the experimental box (1), and the surface of the heterogeneous layer simulation component (3) is coated with a crude oil matrix; A compression component (4), the compression component (4) being mounted on the lower side of the sealing plate (2), and the output end of the compression component (4) being in contact with the upper end of the heterogeneous layer simulation component (3); An experimental environment control component (5), the experimental environment control component (5) being installed on the experimental box (1) for controlling the strain environment in the experimental box (1); A monitoring component (6) is arranged outside the experimental box (1) and is used to monitor the bacterial strain conditions in the experimental box (1).

2. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1 is characterized by: The heterogeneous layer simulation component (3) comprises a fracture block (7) and a hydrophobic layer (8), wherein the fracture block (7) and the hydrophobic layer (8) are arranged in an alternating manner, and the surfaces of the fracture block (7) and the hydrophobic layer (8) are both coated with a crude oil matrix.

3. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 2 is characterized in that: Both ends of the crack block (7) are equipped with fixed plates (9), and the fixed plates (9) are inserted into guide grooves on the guide blocks (10), and the guide blocks (10) are installed on the side walls of the experimental box (1); An elastic member (11) is also installed between two adjacent fixing plates (9).

4. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1 is characterized in that: The compression assembly (4) includes a servo motor (12), the servo motor (12) is installed on the lower side of the sealing plate (2), the output end of the servo motor (12) is installed with a first synchronous wheel (32), the first synchronous wheel (32) is installed with a second synchronous wheel (14) through a synchronous belt (13), the second synchronous wheel (14) is installed with a screw bearing, the screw bearing is provided with a rotating screw (15) matched with the screw bearing, one end of the rotating screw (15) extends into the experimental box (1) and is rotatably connected to a support seat (16), and the support seat (16) is in contact with the upper end of the heterogeneous layer simulation assembly (3); The second synchronous wheel (14) is mounted on a mounting plate (17) via a mounting seat, and the mounting plate (17) is located on the lower side of the sealing plate (2).

5. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1 is characterized in that: The experimental environment control component (5) includes an inert gas tank (18), which is connected to the interior of the experimental box (1) through a connecting pipe (19), and a pressure regulating valve is installed on the connecting pipe (19). The experimental box (1) is installed with an exhaust pipe (20), and an exhaust valve (21) is installed on the exhaust pipe (20).

6. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1, characterized in that: A thermal semiconductor device (22), a temperature sensor (23), a gas pressure sensor (25) and a liquid level sensor (24) are also installed in the experimental box (1).

7. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1 is characterized in that: The lower side of the experimental box (1) is connected to a circulation pump (27) via a delivery pipe (26), and the output end of the circulation pump (27) is connected in sequence to a salinity control component (28) and a discharge pipe (29), and the discharge pipe (29) extends to the middle of the experimental box (1).

8. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1 is characterized by: The monitoring component (6) includes a laser scanner (30) and a high-definition camera (31), and the laser scanner (30) and the high-definition camera (31) are installed on the outer wall of the experimental box (1).

9. The heterogeneous reservoir microbial mineralization simulation experimental device according to claim 1, characterized in that: The experimental box (1) and the sealing plate (2) are both made of highly light-transmitting materials, and the surfaces of the experimental box (1) and the sealing plate (2) are both installed with electrochromic functional layers. A lighting assembly (33) is also installed on the upper end of the experimental box (1).

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