A visual experiment device and method for simulating overflow and leakage coexisting fracture leakage plugging

Abstract

This invention discloses a visual experimental apparatus and method for simulating and sealing leakage from fractures with both overflow and leakage. The apparatus includes a wellbore simulation device, a sealing mud system, a rough fracture plate, a monitoring system, and a gas intrusion system. The wellbore simulation device is connected to both the sealing mud system and the rough fracture plate. The monitoring system is used to observe images of the rough fracture plate and the pressure values ​​of the wellbore simulation device, the sealing mud system, and the gas intrusion system. The sealing mud system injects sealing mud into the rough fracture plate through an internal gas source device. The gas intrusion system inputs gas into the rough fracture plate through a gas cylinder. The monitoring system is used to observe and record the fluid flow and particle bridging behavior within the rough fracture plate and to detect the internal pressure of the wellbore simulation device during the experiment. This invention solves the technical problems of complex experimental procedures, poor operability, and low simulation level in existing technologies by providing a visual experimental apparatus and method for simulating and sealing leakage from fractures with both overflow and leakage.

Description

Technical Field

[0001] This invention relates to the field of drilling research, specifically to a visual experimental device and method for simulating the sealing of leakage from fractures where overflow and leakage coexist. Background Technology

[0002] The coexistence of drilling fluid loss and overflow is a major technical challenge that has long been faced in oil and gas field development. Losses and overflows during drilling not only waste drilling time but also cause drilling fluid loss and consumption, and in severe cases, can lead to personnel casualties, resulting in huge losses for oil and gas field development and seriously hindering its safe and efficient development. Using rigid particles, elasto-plastic materials, and suspended mesh materials to seal fractured leakage channels is the most important loss control method in modern drilling and completion processes.

[0003] However, statistical analysis of oilfield field data reveals that leakage problems under conditions of simultaneous overflow and leakage account for a significant proportion during drilling and completion, resulting in a low success rate of first-time plugging and hindering the smooth progress of drilling and completion projects. Therefore, effectively improving the applicability of plugging formulations and enhancing the success rate of leakage control during drilling are crucial and fundamental for safe and efficient drilling of oil and gas wells. Currently, most domestic and international plugging devices cannot achieve visualized experimental results of plugging during dynamic drilling processes and wellbore-formation gas-liquid interactions, and suffer from problems such as complex experimental procedures, poor operability, and low levels of experimental simulation. Summary of the Invention

[0004] The purpose of this invention is to provide a visual experimental device and method for simulating the sealing of leaks in cracks with both overflow and leakage, so as to solve the technical problems of complex experimental procedures, poor operability and low degree of experimental simulation in the prior art.

[0005] To achieve the above objectives, this invention provides a visual experimental device for simulating leakage plugging in fractures with both overflow and leakage, comprising a wellbore simulation device, a plugging mud system, a rough fracture plate, a monitoring system, and a gas intrusion system. The plugging mud system is connected to the wellbore simulation device, and the rough fracture plate is also connected to the wellbore simulation device. The monitoring system is used to observe images of the rough fracture plate and pressure values ​​of the wellbore simulation device, the plugging mud system, and the gas intrusion system. The plugging mud system inputs liquid-phase plugging mud into the rough fracture plate through an internal gas source device, and the gas intrusion system inputs gas into the rough fracture plate through a gas cylinder. The monitoring system is used to observe and record the fluid flow and particle bridging behavior within the visualized rough fracture during the experiment.

[0006] Furthermore, a stepless variable frequency motor is installed on the top of the well shaft simulation device, and a stirring rod is installed at the output end of the stepless variable frequency motor. The stepless variable frequency motor provides variable power to the stirring rod. The stirring rod is inserted into the interior of the well shaft simulation device, and multiple stirring blades are provided on the side wall of the stirring rod.

[0007] Furthermore, the sealing mud system consists of a mud recovery tank, an air source device, and an intermediate container. The mud recovery tank is connected to the top of the wellbore simulation device via a pipeline, and the air source device is connected to the power outlet at the top of the intermediate container via a pipeline. A valve is installed on the pipeline of the mud recovery tank.

[0008] Furthermore, the bottom of the intermediate container is connected to the bottom of the wellbore simulation device via a pipeline. A valve is installed on the pipeline connecting the bottom of the intermediate container and the wellbore simulation device. A pressure sensor is installed at the top of the intermediate container, and a pressure sensor is installed at the top of the wellbore simulation device.

[0009] Furthermore, a rectangular slit of a specified size is made on the side wall of the wellbore simulation device, and a fixing bolt is installed at the rectangular slit position of the wellbore simulation device. The rough crack plate is connected to the wellbore simulation device through the fixing bolt.

[0010] Furthermore, the rough crack plate is composed of a wire mesh assembly and two transparent glass plates. The wire mesh assembly is composed of multiple wire meshes of different mesh counts laid in staggered layers. The wire mesh assembly composed of wire meshes of different mesh counts is used to simulate the crack surface morphology of different roughness. The two ends of the transparent glass plates have concave snap-fit ​​surfaces, and the wire mesh assembly is installed between the two transparent glass plates through the concave snap-fit ​​surfaces.

[0011] Furthermore, multiple pressure detection holes are provided at both the upper and lower ends of the rough crack plate. Multiple pressure sensors are installed on the rough crack plate through these holes. The pressure sensors are used to detect the internal pressure at the corresponding pressure detection holes of the rough crack plate. A drilling fluid leakage outlet and an overflow simulated gas inlet are provided on the side of the rough crack plate away from the wellbore simulation device. The rough crack plate is connected to the leakage metering device through the drilling fluid leakage outlet and to the gas cylinder through the overflow simulated gas inlet. A valve is installed on the leakage metering device, and a valve and a pressure sensor are installed on the gas cylinder.

[0012] Furthermore, the monitoring system consists of a high-magnification camera, a data information collection system, and a computer system. The high-magnification camera, data information collection system, and computer system are electrically connected. The high-magnification camera is mounted on the upper end of the rough cracked plate via a camera fixing platform. The data information collection system is electrically connected to pressure sensor 1, pressure sensor 2, pressure sensor 3, and pressure sensor 4. The data and image information output by the high-magnification camera, pressure sensor 1, pressure sensor 2, pressure sensor 3, and pressure sensor 4 are all transmitted to the data information collection system, and then transferred by the data information collection system to the computer system for storage and analysis.

[0013] A visual experimental method for simulating leakage sealing in cracks with simultaneous overflow and leakage includes the following steps:

[0014] S1. Install the entire experimental apparatus according to its structure and check its integrity.

[0015] S2. Add the pre-prepared sealing mud to the intermediate container, which is used to simulate a mud tank;

[0016] S3. Open the gas source device, stepless frequency conversion motor, valve one, valve two, valve three and valve four. The air pressure provided by the gas source device is used as power to push the sealing mud in the intermediate container through the pipeline at the bottom of the intermediate container into the wellbore simulation device. The stepless frequency conversion motor provides rotational power to the stirring rod in the wellbore simulation device, driving the stirring rod to rotate to simulate the dynamic drilling process downhole.

[0017] S4. Under the pressure provided by the gas source device, part of the sealing mud enters the rough fracture plate through the pipeline via the wellbore simulation device. The other part of the sealing mud enters the mud recovery pool together with the gas through the pipeline at the top of the wellbore simulation device to simulate the process of crack leakage sealing.

[0018] S5. Observe and acquire images of the migration of sealing mud into the rough cracked plate at different time periods and the formation-destruction-reformation process of the sealing layer through a high-magnification camera. Process the images through the data information collection system and transmit them to the computer system for processing and storage. Use multi-point pressure sensors at the upper and lower ends of the rough cracked plate to acquire pressure values ​​in different areas of the rough cracked plate. Collect the data through the data information collection system and transmit them to the computer system for storage.

[0019] S6. After the experiment, disconnect the power supply, clean the equipment, and analyze the sealing mud's ability to seal fractured formations by combining the image information obtained by the high-magnification camera and the pressure parameters obtained by the multi-point pressure sensor of the fracture plate.

[0020] Based on the above technical solution, the present invention can produce the following beneficial effects:

[0021] This invention provides a visual experimental device and method for simulating leakage and sealing of fractures with both overflow and leakage. The rough fracture plate used for simulating formation fractures is based on the rough morphology of real formation fracture surfaces. It is prepared using a steel wire mesh group with different mesh sizes laid in a staggered manner and a high-strength transparent glass plate to simulate the morphology of real formation fractures, achieving a visual effect of formation fracture sealing. It features good light transmittance, high repeatability, short cycle time, and simple operation. Using a gas source device and gas cylinders, the formation-destruction-reformation process of the sealing layer within the fracture under certain pressure under the dual action of wellbore fluid and formation fluid can be simulated. A monitoring system monitors the multiple migrations, retention, and bridging behavior of the sealing material under formation conditions, observing the multi-level bridging structure of the fracture sealing layer. This reveals the formation mechanism of the sealing layer within the fracture under the condition of both overflow and leakage in real formation, providing a direct and effective evaluation of the formation effect of the formation fracture sealing layer. This can provide a basis for researchers to study the leakage and sealing mechanism of fractures under the condition of both overflow and leakage and to optimize the sealing formula. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the rough cracked plate according to an embodiment of the present invention;

[0024] Figure 3 This is a side view of the structure of the rough cracked plate according to an embodiment of the present invention;

[0025] In the diagram: 1. Wellbore simulation device; 2. Stepless frequency conversion motor; 3. Stirring rod; 4. Stirring blade; 5. Mud recovery tank; 6. Gas source device; 7. Intermediate container; 8. Valve 1; 9. Valve 2; 10. Pressure sensor 1; 11. Pressure sensor 2; 12. Rough crack plate; 13. Wire mesh assembly; 14. Transparent glass plate; 15. Concave snap-fit ​​surface; 16. Fixing bolt; 17. Pressure sensor 3; 18. Leakage metering device; 19. Gas cylinder; 20. High-magnification camera; 21. Data information collection system; 22. Computer system; 23. Valve 3; 24. Valve 4; 25. Pressure sensor 4. Implementation

[0026] To better understand the purpose, structure, and function of this invention, the following description, in conjunction with the accompanying drawings, provides a more detailed description of a visual experimental apparatus and method for simulating leakage and sealing of cracks with simultaneous overflow and leakage.

[0027] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] like Figure 1 As shown, the present invention provides a visualization experimental device for simulating leakage and sealing of cracks with simultaneous overflow and leakage. The device includes a wellbore simulation device 1, a sealing mud system, a rough crack plate 12, a monitoring system, and a gas intrusion system. The sealing mud system is connected to the wellbore simulation device 1, and the rough crack plate 12 is also connected to the wellbore simulation device 1. The monitoring system is used to observe the image of the rough crack plate 12 and the pressure values ​​of the wellbore simulation device 1, the sealing mud system, and the gas intrusion system. The sealing mud system inputs liquid sealing mud into the rough crack plate 12 through an internal gas source device 6. The gas intrusion system inputs gas into the rough crack plate 12 through a gas cylinder 19. The monitoring system is used to observe and record the fluid flow and particle bridging behavior within the visualized rough crack during the experiment.

[0029] A continuously variable frequency motor 2 is installed on the top of the wellbore simulation device 1. A stirring rod 3 is installed at the output end of the continuously variable frequency motor 2, which provides variable power to the stirring rod 3. The stirring rod 3 is inserted into the wellbore simulation device 1, and multiple stirring blades 4 are provided on the side wall of the stirring rod 3. The wellbore simulation device 1 is used to simulate the dynamic flow state of drilling fluid in actual drilling projects. The continuously variable frequency motor 2 connected to the stirring rod 3 provides variable power to the stirring rod 3 to simulate the impact of drilling conditions at different rotation speeds downhole on plugging.

[0030] The sealing mud system consists of a mud recovery tank 5, an air source device 6, and an intermediate container 7. The mud recovery tank 5 is connected to the top of the wellbore simulation device 1 via a pipeline. The air source device 6 is connected to the power outlet end at the top of the intermediate container 7 via a pipeline. A valve 8 is installed on the pipeline of the mud recovery tank 5.

[0031] The bottom of the intermediate container 7 is connected to the bottom of the well shaft simulation device 1 via a pipeline. A valve 2 9 is installed on the pipeline between the intermediate container 7 and the bottom of the well shaft simulation device 1. A pressure sensor 10 is installed at the upper end of the intermediate container 7, and a pressure sensor 2 11 is installed at the upper end of the well shaft simulation device 1.

[0032] The gas source device 6 is connected to the pressure inlet of the intermediate container 7. Its main function is to provide the power for the sealing mud to enter the wellbore simulation device 1 from the intermediate container 7. The pressure sensor 10 installed on the connecting pipeline between the gas source device 6 and the intermediate container 7 has the main function of detecting the pressure at the inlet of the intermediate container 7 and determining the inlet pressure of the wellbore simulation device 1. The bottom interface of the wellbore simulation device 1 is the inlet, which is the channel for the sealing mud to enter the wellbore simulation device 1. The two interfaces at the top of the wellbore simulation device 1 are the outlets, which are used to simulate the outlets for drilling fluid and formation gas to return to the surface.

[0033] Valve 8 is used to control the flow rate of the fluid discharged from the wellbore simulation device 1. By controlling the flow rate of the fluid discharged from the wellbore simulation device 1, the pressure in the wellbore simulation device 1 can be controlled to achieve the sealing conditions under different conditions. Valve 9 is used to control the amount of drilling sealing mud entering the wellbore simulation device 1 from the intermediate container 7 and to act as a barrier when mud needs to be added to the intermediate container 7 to prevent the backflow of sealing mud in the wellbore simulation device 1.

[0034] Pressure sensor 211 is used to measure the fluid pressure inside the wellbore simulation device 1.

[0035] A rectangular slit of a specified size is made on the side wall of the well shaft simulation device 1. A fixing bolt 16 is installed at the rectangular slit position of the well shaft simulation device 1. The rough crack plate 12 is connected to the well shaft simulation device 1 through the fixing bolt 16. The fixing bolt 16 is used to fix the parallel crack device composed of rough crack plates 12 of different sizes.

[0036] like Figures 2-3 As shown, the rough fracture plate 12 is composed of a wire mesh assembly 13 and two transparent glass plates 14. The wire mesh assembly 13 is composed of multiple wire meshes of different mesh sizes laid in a staggered manner. The wire mesh assembly 13 composed of wire meshes of different mesh sizes is used to simulate the morphology of fracture surfaces with different roughness. The two ends of the transparent glass plates 14 have concave snap-fit ​​surfaces 15, and the wire mesh assembly 13 is installed between the two transparent glass plates 14 through the concave snap-fit ​​surfaces 15. Formation fracture characteristic parameters are obtained through methods including core data analysis. Based on the obtained fracture characteristic parameters, the wire mesh assembly 13 composed of wire meshes of the corresponding mesh size is preferred. Based on the obtained fracture characteristic parameters, the high-strength transparent glass plate 14 or resin plate is preferred. The parallel and visualized rough fracture plate 12 is obtained by combining the wire mesh assembly 13 and the high-strength transparent glass plate 14 or resin plate.

[0037] Multiple pressure detection holes are provided at the upper and lower ends of the rough crack plate 12. Multiple pressure sensors 17 are installed on the rough crack plate 12 through the multiple pressure detection holes. The pressure sensors 17 are used to detect the internal pressure at the corresponding pressure detection holes of the rough crack plate 12. A drilling fluid leakage outlet and an overflow simulated gas inlet are provided on the side of the rough crack plate 12 away from the wellbore simulation device 1. The rough crack plate 12 is connected to the leakage metering device 18 through the drilling fluid leakage outlet and to the gas cylinder 19 through the overflow simulated gas inlet. A valve 23 is installed on the leakage metering device 18, and a valve 24 and a pressure sensor 25 are installed on the gas cylinder 19.

[0038] The leakage metering device 18 is used to measure the amount of drilling fluid leakage, thereby evaluating the sealing effect of the fracture.

[0039] Valve 3 23 is used to control the flow rate of the discharged fluid, thereby controlling the fluid pressure inside the crack and simulating crack sealing conditions under different flow pressures; Valve 4 24 is the valve of gas cylinder 19, used to control the gas flow rate, and the gas-liquid interaction conditions under different gas flow rates are realized through the control of valve 4 24.

[0040] Pressure sensor 17 is used to measure the pressure value at different parts of the rough crack plate 12 during the sealing process. Since the fluid flow and distribution are different at different parts of the crack during the sealing process, the pressure is also different. The distribution of sealing slurry and gas in the crack can be analyzed by the pressure distribution. The rough crack plate 12 is connected to the wellbore simulation device 1 by the fixing bolt 16, which has good sealing performance and can prevent fluid from flowing out from the gap at the connection.

[0041] The monitoring system consists of a high-magnification camera 20, a data information collection system 21, and a computer system 22. The high-magnification camera 20, the data information collection system 21, and the computer system 22 are electrically connected. The high-magnification camera 20 is mounted on the upper end of the rough cracked plate 12 via a camera fixing platform. The data information collection system 21 is electrically connected to pressure sensor 10, pressure sensor 21, pressure sensor 317, and pressure sensor 425. The data and image information output by the high-magnification camera 20, pressure sensor 10, pressure sensor 21, pressure sensor 317, and pressure sensor 425 are all transmitted to the data information collection system 21, and then transferred by the data information collection system 21 to the computer system 22 for storage and analysis.

[0042] A visual experimental method for simulating leakage sealing in cracks with simultaneous overflow and leakage includes the following steps:

[0043] S1. Install the entire experimental apparatus according to its structure and check its integrity.

[0044] S2. Add the pre-prepared sealing mud into the intermediate container 7, which is used to simulate a mud tank;

[0045] S3. Open the gas source device 6, the stepless frequency conversion motor 2, valve 1 8, valve 2 9, valve 3 23 and valve 4 24. The air pressure provided by the gas source device 6 is used as power to push the sealing mud in the intermediate container 7 through the pipeline at the bottom of the intermediate container 7 into the wellbore simulation device 1. The stepless frequency conversion motor 2 provides rotational power to the stirring rod 3 in the wellbore simulation device 1 to drive the stirring rod 3 to rotate and simulate the dynamic drilling process downhole.

[0046] S4. Under the pressure provided by the gas source device 6, part of the sealing mud enters the rough fracture plate 12 through the pipeline via the wellbore simulation device 1. The other part of the sealing mud enters the mud recovery tank 5 together with the gas through the top pipeline of the wellbore simulation device 1 to simulate the process of crack leakage sealing.

[0047] S5. The high-magnification camera 20 observes and acquires images of the migration of sealing mud into the rough crack plate 12 at different time periods and the formation-destruction-reformation process of the sealing layer. The images are then processed by the data information collection system 21 and transmitted to the computer system 22 for processing and storage. The pressure values ​​of different areas within the rough crack plate 12 are acquired by the multi-point pressure sensors 17 set at both ends of the rough crack plate 12. The data are collected by the data information collection system 21 and transmitted to the computer system 22 for storage.

[0048] S6. After the experiment, disconnect the power supply, clean the equipment, and analyze the sealing mud's ability to seal fractured formations by combining the image information obtained by the high-magnification camera 20 and the pressure parameters obtained by the multi-point pressure sensor of the fracture plate.

[0049] It is understood that, as described through some embodiments, various changes or equivalent substitutions can be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, modifications can be made to these features and embodiments to adapt to specific circumstances and materials without departing from the spirit and scope of the invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this invention.

Claims

1. A visualized experimental device for simulating overflow and leakage coexisting fracture leakage plugging, characterized in that, The application relates to a wellbore simulation device (1), a sealing mud system, a rough fracture plate (12), a monitoring system and a gas invasion system, wherein the sealing mud system is connected with the wellbore simulation device (1), the rough fracture plate (12) is connected with the wellbore simulation device (1), the monitoring system is used for observing the image of the rough fracture plate (12) and the pressure value of the wellbore simulation device (1), the sealing mud system, and the gas invasion system, the sealing mud system inputs liquid-phase sealing mud into the rough fracture plate (12) through a gas source device (6) arranged inside, the gas invasion system inputs gas into the rough fracture plate (12) through a gas cylinder (19), and the monitoring system is used for observing and recording the fluid flow and the change behavior of the particle bridge in the visualized rough fracture during the experiment. The sealing mud system is composed of a mud recovery tank (5), a gas source device (6) and an intermediate container (7), the mud recovery tank (5) is connected with the top of the wellbore simulation device (1) through a pipeline, the gas source device (6) is connected with the power outlet end of the top of the intermediate container (7) through a pipeline, and a valve (8) is arranged on the pipeline of the mud recovery tank (5). The rough fracture plate (12) is composed of a wire mesh group (13) and two transparent glass plates (14), the wire mesh group (13) is composed of a plurality of wire meshes with different meshes which are staggered and stacked, the wire mesh group (13) composed of the wire meshes with different meshes is used for simulating different rough fracture surface morphologies, recessed buckle surfaces (15) are arranged at the two ends of the transparent glass plates (14), and the wire mesh group (13) is arranged between the two transparent glass plates (14) through the recessed buckle surfaces (15).

2. The visualizing experimental device for simulating overflow and leak coexisting fracture leakage plugging according to claim 1, characterized in that, A variable-frequency motor (2) is arranged at the top of the wellbore simulation device (1), an output end of the variable-frequency motor (2) is provided with a stirring rod (3), the variable-frequency motor (2) provides variable power for the stirring rod (3), the stirring rod (3) is inserted into the inside of the wellbore simulation device (1), and a plurality of stirring blades (4) are arranged on the side wall of the stirring rod (3).

3. The visualizing experimental device for simulating overflow and leak coexisting fracture leakage sealing according to claim 1, wherein, The bottom of the intermediate container (7) is connected with the bottom of the wellbore simulation device (1) through a pipeline, a valve (9) is arranged on the pipeline between the intermediate container (7) and the bottom of the wellbore simulation device (1), a pressure sensor (10) is arranged at the upper end of the intermediate container (7), and a pressure sensor (11) is arranged at the upper end of the wellbore simulation device (1).

4. The visualizing experimental device for simulating overflow and leak coexisting fracture leakage sealing according to claim 1, characterized in that, A rectangular cutting slot with a specified size is arranged on the side wall of the wellbore simulation device (1), a fixing bolt (16) is arranged at the position of the rectangular cutting slot of the wellbore simulation device (1), and the rough fracture plate (12) is connected with the wellbore simulation device (1) through the fixing bolt (16).

5. The visualizing experimental device for simulating overflow and leak coexisting fracture leakage sealing according to claim 1, characterized in that, The upper and lower ends of the rough fracture plate (12) are provided with a plurality of pressure detection holes, and the rough fracture plate (12) is provided with a plurality of pressure sensors three (17) through the plurality of pressure detection holes, and the pressure sensors three (17) are used for detecting the internal pressure of the rough fracture plate (12) at the corresponding pressure detection hole; the side of the rough fracture plate (12) away from the shaft simulation device (1) is provided with a drilling fluid loss outlet and an overflow simulation gas inlet, the rough fracture plate (12) is connected with the loss metering equipment (18) through the drilling fluid loss outlet, the rough fracture plate (12) is connected with the gas cylinder (19) through the overflow simulation gas inlet, a valve three (23) is installed on the loss metering equipment (18), and a valve four (24) and a pressure sensor four (25) are installed on the gas cylinder (19).

6. The visualizing experimental device for simulating overflow and leak coexisting fracture leakage sealing according to claim 1, characterized in that, The monitoring system is composed of a high-power camera (20), a data information collection system (21) and a computer system (22), and the high-power camera (20), the data information collection system (21) and the computer system (22) are electrically connected. The high-power camera (20) is installed on the upper end of the rough fracture plate (12) through a camera fixing platform, the data information collection system (21) is electrically connected with the pressure sensor one (10), the pressure sensor two (11), the pressure sensor three (17) and the pressure sensor four (25), and the data and image information output by the high-power camera (20), the pressure sensor one (10), the pressure sensor two (11), the pressure sensor three (17) and the pressure sensor four (25) are transmitted to the data information collection system (21), and then transmitted to the computer system (22) by the data information collection system (21) for storage and analysis.

7. A visualized experiment method for simulating overflow and leakage coexisting fracture leakage plugging, which is implemented by the visualized experiment device for simulating overflow and leakage coexisting fracture leakage plugging according to any one of claims 1 to 6, characterized in that, It comprises the following steps: S1, install the entire experimental device according to the structure of the experimental device, and check the integrity of the device; S2, add the prepared plugging mud into the intermediate container (7), and the intermediate container (7) is used for simulating a mud tank; S3, open the gas source device (6), the variable frequency motor (2), the valve one (8), the valve two (9), the valve three (23) and the valve four (24), the gas pressure provided by the gas source device (6) is used as power to push the plugging mud in the intermediate container (7) to enter the shaft simulation device (1) through the pipeline at the bottom of the intermediate container (7), the variable frequency motor (2) provides rotating power for the stirring rod (3) in the shaft simulation device (1) to drive the stirring rod (3) to rotate to simulate the dynamic drilling process in the well; S4, part of the plugging mud enters the rough fracture plate (12) through the pipeline under the action of the pressure provided by the gas source device (6) after passing through the shaft simulation device (1), and the other part of the plugging mud enters the mud recovery tank (5) together with the gas through the pipeline at the top of the shaft simulation device (1) to simulate the fracture loss plugging process; S5, through the high magnification camera (20) observation and access to different time periods into the rough fracture plate (12) into the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation of the formation ​

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