Temporary plugging agent filling quantity simulation test device and temporary plugging agent filling quantity simulation test method

Abstract

This invention relates to the field of temporary plugging agent injection simulation testing, and particularly to a device and method for simulating the injection volume of temporary plugging agents. The device includes a fracture simulation device comprising at least two fracture simulation plates arranged at an angle, forming a simulated fracture between the plates. The simulated fracture has a front opening and a side opening. A fracturing fluid injection simulation device is connected to the front opening. A weighing device is located below the fracture simulation device, and a drain filter is mounted on the weighing device. A camera is located at the front opening of the fracture simulation device for identifying the sealing structure characteristics of the temporary plugging agent within the fracture. Both the fracturing fluid injection simulation device and the camera are connected to a control device, which adjusts the injection volume of the temporary plugging agent based on the sealing structure characteristics acquired by the camera. This invention provides a testing platform for simulating and detecting the injection volume of temporary plugging agents, enabling the detection of the injection volume.

Description

Technical Field

[0001] This invention relates to the field of temporary plugging agent injection simulation testing, and particularly to a device and method for simulating the injection volume of temporary plugging agents. Background Technology

[0002] Diverting fracturing technology is a reservoir stimulation method that involves injecting a fracture diverting agent during fracturing. Based on the bridging principle, it utilizes the plasticity of the temporary plugging agent and the rigidity of the proppant, and through control of hydraulic fracturing construction parameters, achieves bridging within the hydraulically fractured area, thereby increasing the net pressure of the hydraulically fracturing fracture. During fracturing, chemical temporary plugging agents can be used to temporarily plug old fractures and force open new fractures. Reservoir stimulation during fracturing mainly employs long-section + multi-cluster + composite temporary plugging diverting fracturing technology.

[0003] Due to factors such as the difficulty in accurately determining the number of open holes and the width of the near-wellbore main fracture, the unclear matching relationship between the sealing pressure and fracture width of different temporary plugging agents, the lack of indoor experimental support for optimizing the construction parameters of temporary plugging agents, and the unclear relationship between the amount of temporary plugging agent injected and the inter-cluster temporary plugging, on-site composite temporary plugging is often blind and relatively poorly targeted, resulting in unsatisfactory diversion effects and even causing project complexity, seriously affecting the transformation effect and construction timeliness. Among these factors, the amount of temporary plugging agent injected, i.e., the quality of the temporary plugging agent accumulated at the fracture, is a key factor affecting the diversion effect of temporary plugging, but currently there is no simulation detection device for the amount of temporary plugging agent injected. Summary of the Invention

[0004] The purpose of this invention is to provide a device for simulating the amount of temporary plugging agent injected, which can provide a test platform for simulating and detecting the amount of temporary plugging agent injected; at the same time, another purpose of this invention is to provide a method for simulating the amount of temporary plugging agent injected, which can realize the detection of the amount of temporary plugging agent injected.

[0005] The present invention adopts the following technical solution:

[0006] A temporary plugging agent injection simulation test device includes a fracture simulation device, which comprises at least two fracture simulation plates arranged at an angle, forming a simulated fracture between the plates to simulate actual formation fractures. The simulated fracture has a front opening on one side of the two fracture simulation plates that is far apart from each other, and side openings on both sides of the front opening. The front opening is connected to a fracturing fluid simulation injection device for injecting fracturing fluid carrying temporary plugging agent into the fracture within the fracture simulation device. A weighing device is provided below the fracture simulation device to receive the temporary plugging agent flushed out from the side openings. The weighing device is equipped with a drain filter to filter particulate matter in the temporary plugging agent and discharge the fracturing fluid, thereby weighing the temporary plugging agent discharged from the fracture. A camera device is provided at the front opening of the fracture simulation device to identify the sealing structure characteristics of the temporary plugging agent within the fracture. Both the fracturing fluid simulation injection device and the camera device are connected to a control device, which adjusts the injection amount of fracturing fluid carrying temporary plugging agent based on the sealing structure characteristics acquired by the camera device.

[0007] Beneficial effects: By adopting the above technical solution, simulated fractures can be formed by at least two fracture simulation plates arranged at an angle, thus simulating actual formation fractures. When the fracturing fluid simulation injection device injects fracturing fluid carrying temporary plugging agent into the front opening of the simulated fracture, part of the temporary plugging agent is sealed at the fracture, and part of the temporary plugging agent can be flushed out from the side opening, thereby simulating the sealing situation of the temporary plugging agent at the fracture. The camera device and control device can control the amount of fracturing fluid carrying temporary plugging agent added. The fracturing fluid simulation injection device can control and detect the amount of temporary plugging agent added by controlling and detecting the amount of fracturing fluid added. Combined with the weighing device to weigh the flushed temporary plugging agent, the cumulative sealing mass of the temporary plugging agent can be calculated, thus simulating the amount of temporary plugging agent injected.

[0008] Furthermore, the temporary plugging agent injection volume simulation test device also includes a enclosure structure, which is disposed between the side opening and the weighing device, for collecting the temporary plugging agent discharged from the simulated crack into the weighing device.

[0009] Beneficial effects: The above technical solution can prevent the temporary plugging agent discharged from the simulated crack from being thrown out of the weighing device, thus ensuring the accuracy of the test results.

[0010] Furthermore, the enclosure structure is a mesh enclosure.

[0011] Beneficial effects: By adopting the above technical solution, the mesh enclosure can filter out a portion of the fracturing fluid, which is beneficial to improving the real-time detection accuracy of the weighing device.

[0012] Furthermore, the weighing device is connected to the control device and is used to automatically calculate the cumulative mass of the temporary plugging agent.

[0013] Beneficial effects: The above technical solution enables the calculation of the cumulative mass of temporary plugging agent in real time and conveniently.

[0014] Furthermore, the fracturing fluid simulation injection device includes a simulated wellbore and a simulated tubing string. The top of the simulated tubing string is used for fracturing fluid injection, the bottom of the simulated wellbore is provided with a closed space, the lower end of the simulated tubing string is connected to the closed space, and the bottom side wall of the wellbore is provided with a drain port for the fracturing fluid entering the closed space to be discharged.

[0015] Furthermore, well pressure sensors are installed at both the top and bottom of the simulated wellbore to test the fracturing fluid circulation pressure at different locations.

[0016] Beneficial effects: The above technical solution can detect the fracturing fluid circulation pressure, and the fracturing fluid circulation can be controlled based on the detection results, thereby simulating the actual situation more accurately.

[0017] Furthermore, the temporary plugging agent injection volume simulation test device also includes a crack size adjustment device, which is used to adjust the size of the simulated crack between two adjacent crack simulation plates.

[0018] Beneficial effects: The above technical solution can simulate crack changes, meet different test requirements, and more realistically reflect the actual situation.

[0019] Furthermore, the temporary plugging agent injection volume simulation test device also includes a wall pressure sensor, which is used to detect the fracturing fluid impact pressure borne by the corresponding position on the inner wall of the crack simulation plate.

[0020] Beneficial effects: The above technical solution can simultaneously obtain the pressure value at the impact point of the fracturing fluid and understand the migration law of the fracturing fluid.

[0021] A method for simulating the injection volume of temporary plugging agent, characterized in that the method includes the following steps:

[0022] Step 1: Inject fracturing fluid carrying temporary plugging agent into the fracture simulation device through the fracturing fluid simulation injection device. The fracture simulation device includes at least two fracture simulation plates arranged at an angle, and a simulated fracture is formed between the fracture simulation plates to simulate actual formation fractures.

[0023] Step 2: Weigh the temporary plugging agent that flows out from the side opening of the crack using the weighing device below the crack simulation device, and identify the sealing structure characteristics of the temporary plugging agent in the crack using the camera device at the front opening of the crack simulation device.

[0024] Step 3: Adjust the amount of fracturing fluid carrying temporary plugging agent added by the control device connected to the fracturing fluid simulation injection device and the camera device according to the plugging structure characteristics collected by the camera device.

[0025] Step 4: Calculate the amount of temporary plugging agent added. The amount of temporary plugging agent added = the supply amount of temporary plugging agent - the weighing mass of the temporary plugging agent weighing device.

[0026] Beneficial effects: By adopting the above technical solution, simulated fractures can be formed by at least two fracture simulation plates arranged at an angle, thus simulating actual formation fractures. When the fracturing fluid simulation injection device injects fracturing fluid carrying temporary plugging agent into the opening at the front of the simulated fracture, part of the temporary plugging agent is sealed at the fracture, and part of the temporary plugging agent can be flushed out from the side opening, thereby simulating the sealing situation of the temporary plugging agent at the fracture. The camera device and control device can control the amount of temporary plugging agent added. Combined with the weighing device to weigh the flushed temporary plugging agent, the cumulative sealing mass of the temporary plugging agent can be calculated according to the formula: Temporary plugging agent injection amount = Temporary plugging agent supply amount - Temporary plugging agent weighing mass, thus simulating the injection amount of temporary plugging agent.

[0027] Furthermore, the size of the simulated crack is adjusted by changing the inclination of adjacent crack simulation plates, thereby simulating the effect of different crack heights on the amount of temporary plugging agent injected.

[0028] Beneficial effects: The above technical solution can simulate crack changes, meet different test requirements, and more realistically reflect the actual situation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the temporary plugging agent injection volume simulation test device of the present invention;

[0030] Figure 2 yes Figure 1 A schematic diagram of the structure of the simulated crack section.

[0031] The names of the components corresponding to the corresponding reference numerals in the figure are as follows: 10. Fracture simulation device; 11. Fracture simulation plate; 12. Telescopic support device; 13. Fracture borehole; 20. Fracturing fluid simulation injection device; 21. Simulated wellbore; 22. Simulated tubing string; 23. Enclosed space; 24. Drainage port; 25. Well pressure sensor; 26. Hoses; 30. Weighing device; 31. Weighing container; 32. Drainage filter; 33. Enclosure structure; 40. Camera device; 51. Wall pressure sensor; 52. Pressure guide pipe; 60. Control device; 71. Fracturing fluid; 72. Temporary plugging agent. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a…" to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the body, or it can be separately arranged from the body and connected to the body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0037] The present invention will be further described in detail below with reference to the embodiments.

[0038] Example 1 of the temporary plugging agent injection volume simulation test device of the present invention:

[0039] like Figure 1 and Figure 2 As shown, the temporary plugging agent injection volume simulation test device includes a fracture simulation device 10, a fracturing fluid simulation injection device 20, a weighing device 30, and a control device 60.

[0040] The fracture simulation device 10 is used to simulate actual formation fractures, such as... Figure 2 The system includes three fracture simulation plates 11 arranged at an angle. One fracture simulation plate 11 is horizontally arranged, while the other two are inclined. The lower sides of the two inclined fracture simulation plates 11 are stacked sequentially, and one side of adjacent fracture simulation plates 11 is hinged to each other. The side opposite to the hinged side can be opened and closed to form a simulated fracture. In this embodiment, there are two simulated fractures. Of course, one of the two adjacent fracture simulation plates 11 can be fixed, and the other can be made to swing. The fracture simulation plates 11 can be purchased from the market or manufactured by oneself, which will not be described in detail here. The simulated fracture has a front opening on the side of the two fracture simulation plates 11 that is far apart from each other, and side openings on both sides of the front opening. The front opening is used to connect the fracturing fluid simulation injection device 20. In addition, the temporary plugging agent injection volume simulation test device also includes a wall pressure sensor 51. The wall pressure sensor 51 is connected to the inner wall of the fracture simulation plate 11 through a pressure guide pipe 52. It is used to detect the impact pressure of the fracturing fluid 71 at the corresponding position on the inner wall of the fracture simulation plate 11, thereby obtaining the pressure value of the impact point of the fracturing fluid 71 and the migration law of the fracturing fluid 71.

[0041] Because the fracture size is variable during actual temporary plugging and diversion operations, and the fracture height and width change constantly with the fracturing operation, the temporary plugging agent injection volume simulation test device also includes a fracture size adjustment device to more realistically simulate actual operating conditions. This device is used to adjust the size of the simulated fracture between two adjacent fracture simulation plates 11. In this embodiment, the fracture size adjustment device is a telescopic support device 12 connected between two corresponding fracture simulation plates 11. The size of the simulated fracture can be adjusted by adjusting the height of the telescopic support device 12. The telescopic support device 12 can be any device in the prior art that meets the strength requirements, such as a hydraulic cylinder, or a device that uses a screw and nut mechanism to achieve telescopic movement.

[0042] In this embodiment, several crack holes 13 are drilled on the crack simulation plate 11 to simulate the temporary plugging effect of the temporary plugging agent 72 on the holes. If it is not necessary to simulate the temporary plugging of holes, a crack simulation plate 11 without holes can be used.

[0043] The fracturing fluid simulation injection device 20 is used to inject fracturing fluid 71 carrying temporary plugging agent 72 into the fracture within the fracture simulation device 10. In this embodiment, the fracturing fluid simulation injection device 20 includes a simulated wellbore 21 and a simulated tubing string 22. The top of the simulated tubing string 22 is used for injecting fracturing fluid 71, and the bottom of the simulated wellbore 21 is provided with a closed space 23. The lower end of the simulated tubing string 22 is connected to the closed space 23, and a drain port 24 is provided on the bottom side wall of the wellbore to allow the fracturing fluid 71 entering the closed space 23 to be discharged. The fracturing fluid simulation injection device 20 can be configured according to the oil well to be simulated, and can simulate the speed and impact of the temporary plugging agent 72 during the injection of fracturing fluid 71, making the test results more accurate. Well pressure sensors 25 are provided at both the top and bottom of the simulated wellbore 21 to test the circulating pressure of the fracturing fluid 71 at different locations.

[0044] In this embodiment, the drain port 24 of the fracturing fluid simulation injection device 20 is connected to the front opening of the simulated fracture via a flexible hose 26. The use of the flexible hose 26 allows for adjustment based on the size of the simulated fracture. In other embodiments, the front of the simulated fracture can also be a closed structure, with only a connector adapted to the size of the flexible hose 26 serving as the front opening, thus more realistically reflecting the actual fracture situation. Additionally, in other embodiments, a transition channel can be provided between the opening formed directly at the edges of two adjacent fracture simulation plates 11 and the drain port 24 of the fracturing fluid simulation injection device 20. One end of the transition channel is adapted to the shape of the drain port 24, and the other end is adapted to the shape of the opening formed directly at the edges of two adjacent fracture simulation plates 11, with a smooth transition between the two ends of the transition channel.

[0045] A weighing device 30 is provided below the fracture simulation device 10 to receive the temporary plugging agent 72 that flows out from the side opening of the fracture simulation device 10. The weighing device 30 includes a weighing container 31 with an opening on its side wall. A drain filter 32 is provided at the opening. The pore size of the drain filter 32 is smaller than the minimum particle size of the fixed particulate temporary plugging agent 72 injected, and it can discharge pure fracturing fluid 71 to ensure accurate weighing of the mass of the temporary plugging agent 72 that is not used for plugging. To prevent the fracturing fluid 71 discharged from the side opening of the simulated fracture from being sprayed outside the weighing device 30 and affecting the accuracy of the test results, the temporary plugging agent injection volume simulation test device also includes a baffle structure 33. The baffle structure 33 is set between the side opening and the weighing device 30. It is a mesh baffle to collect the temporary plugging agent 72 discharged from the simulated fracture into the weighing device 30 and to discharge a portion of the fracturing fluid 71.

[0046] A camera device 40 is installed at the front opening of the crack simulation device 10 to identify the sealing structure characteristics of the temporary plugging agent 72 within the crack. The sealing structure characteristics of the temporary plugging agent 72 generally include bridging and jamming. As a prior art, by judging the bridging or jamming state of the temporary plugging agent 72, the corresponding control device 60 can calculate the amount of temporary plugging agent 72 to be added according to the corresponding model and algorithm.

[0047] In this embodiment, the control device 60 is an industrial computer. The fracturing fluid simulation injection device 20, the wall pressure sensor 51, the telescopic support device 12, the well pressure sensor 25, the weighing device 30, the camera device 40, etc. are all connected to the control device 60, which can realize automatic control and automatically calculate the injection amount of temporary plugging agent 72. The injection amount of temporary plugging agent 72 = the supply amount of temporary plugging agent 72 - the weighing mass of the temporary plugging agent weighing device 30.

[0048] Experimental Procedure: During the experiment, a predetermined supply of temporary plugging agent 72 was first set. Fracturing fluid 71 carrying the temporary plugging agent 72 was injected into the fracture simulation device 10 through the fracturing fluid simulation injection device 20. During the experiment, a portion of the temporary plugging agent 72 was sealed within the simulated fracture, while a portion was flushed out from the side opening of the fracture along with the fracturing fluid 71. The flushed-out temporary plugging agent 72 entered the weighing device 30, while the fracturing fluid 71 was discharged from the drainage filter 32 on the weighing device 30, thus achieving the weighing of the flushed-out temporary plugging agent 72. Simultaneously, the camera device 40 at the front opening of the fracture simulation device 10 could identify the contents of the fracture. The plugging structure characteristics of the temporary plugging agent 72 are determined by a control device 60 connected to the fracturing fluid simulation injection device 20 and the camera device 40. Based on the plugging structure characteristics collected by the camera device 40, the supply amount of the temporary plugging agent 72 is adjusted until the injection of the temporary plugging agent 72 is completed. The control device 60 automatically calculates the final injection amount of the temporary plugging agent 72 as: the supply amount of the temporary plugging agent 72 minus the mass weighed by the temporary plugging agent weighing device 30. Since the amount of temporary plugging agent 72 added to the fracturing fluid 71 is a set value and is uniformly carried by the fracturing fluid 71, the supply amount of the temporary plugging agent 72 can be obtained based on the injection amount of the fracturing fluid 71 during the test. The injection amount of the fracturing fluid 71 is controlled by the fracturing fluid simulation injection device 20.

[0049] In the above embodiments, the temporary plugging agent injection volume simulation test device also includes a containment structure 33, which is a mesh containment structure used to collect the temporary plugging agent 72 discharged from the simulated fracture into the weighing device 30 and to filter out the fracturing fluid 71. In other embodiments, the temporary plugging agent injection volume simulation test device is a plate-shaped containment structure, and the fracturing fluid 71 is filtered out after flowing into the weighing device 30. Of course, in other embodiments, other methods can also be used to prevent the temporary plugging agent 72 discharged from the simulated fracture from being thrown out of the weighing device 30, such as increasing the receiving area of ​​the weighing device 30 or aligning the material inlet of the weighing device 30 with the side opening of the simulated fracture.

[0050] In the above embodiments, the fracturing fluid simulation injection device 20 includes a simulated wellbore 21 and a simulated tubing string 22, which can simulate the actual injection state of fracturing fluid 71. In other embodiments, the fracturing fluid simulation injection device 20 does not have a simulated wellbore 21 and a simulated tubing string 22, and directly injects fracturing fluid 71 into the fracture simulation device 10 at a set pressure and flow rate.

[0051] In the above embodiments, the crack simulation device 10 includes three crack simulation plates 11 arranged at an angle, while in this embodiment, the crack simulation device 10 only has two crack simulation plates 11. Of course, in other embodiments, the number of crack simulation plates 11 and simulated cracks can be increased or decreased as needed.

[0052] In the above embodiments, the wall pressure sensor 51 is connected to the corresponding position on the inner wall of the crack simulation plate 11 through the pressure guide tube 52. In this embodiment, the wall pressure sensor 51 is directly fixed on the inner wall of the crack simulation plate 11.

[0053] An embodiment of the temporary plugging agent injection volume simulation test method in this invention: The embodiment of the temporary plugging agent injection volume simulation test method is the test process described in any embodiment of the temporary plugging agent injection volume simulation test device described above, and will not be described in detail here.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A device for simulating the dosage of a temporary plugging agent, characterized in that, The device includes a fracture simulation apparatus (10), which comprises at least two fracture simulation plates (11) arranged at an angle to each other, forming a simulated fracture between the plates to simulate actual formation fractures. The simulated fracture has a front opening on one side away from the two fracture simulation plates and side openings on both sides of the front opening. The front opening is connected to a fracturing fluid simulation injection device (20) for injecting fracturing fluid (71) carrying a temporary plugging agent (72) into the fracture within the device. A weighing device (30) is provided below the device to receive water from the fracture simulation apparatus. The temporary plugging agent flushed out from the side opening of the fracturing fluid is weighed by a drain filter (32) on the weighing device, which is used to filter out particulate matter in the temporary plugging agent and discharge the fracturing fluid, thereby weighing the temporary plugging agent discharged from the fracture. A camera (40) is provided at the front opening of the fracture simulation device to identify the sealing structure characteristics of the temporary plugging agent in the fracture. The fracturing fluid simulation injection device and the camera are both connected to the control device (60). The control device is used to adjust the amount of fracturing fluid carrying the temporary plugging agent added according to the sealing structure characteristics collected by the camera. The weighing device is connected to the control device to automatically calculate the cumulative mass of the temporary plugging agent.

2. The temporary plugging agent injection volume simulation test device according to claim 1, characterized in that, The temporary plugging agent injection volume simulation test device also includes a enclosure structure (33), which is set between the side opening and the weighing device (30) to collect the temporary plugging agent (72) discharged from the simulated crack into the weighing device.

3. The temporary plugging agent injection volume simulation test device according to claim 2, characterized in that, The enclosure structure (33) is a mesh enclosure.

4. The temporary plugging agent injection volume simulation test device according to claim 1, 2, or 3, characterized in that, The fracturing fluid simulation injection device (20) includes a simulated wellbore (21) and a simulated tubing string (22). The top of the simulated tubing string is used for fracturing fluid (71) injection. The bottom of the simulated wellbore is provided with a closed space (23). The lower end of the simulated tubing string is connected to the closed space. The bottom side wall of the wellbore is provided with a drain port (24) for fracturing fluid entering the closed space to be discharged.

5. The temporary plugging agent injection volume simulation test device according to claim 4, characterized in that, The simulated wellbore (21) is equipped with well pressure sensors (25) at both the top and bottom to test the circulating pressure of fracturing fluid (71) at different locations.

6. The temporary plugging agent injection volume simulation test device according to claim 1, 2, or 3, characterized in that, The temporary plugging agent injection volume simulation test device also includes a crack size adjustment device, which is used to adjust the size of the simulated crack between two adjacent crack simulation plates (11).

7. The temporary plugging agent injection volume simulation test device according to claim 1, 2, or 3, characterized in that, The temporary plugging agent injection volume simulation test device also includes a wall pressure sensor (51) for detecting the impact pressure of fracturing fluid (71) on the corresponding position of the inner wall of the crack simulation plate (11).

8. A method for simulating the amount of temporary plugging agent added using the device according to any one of claims 1-7, characterized in that, The method includes the following steps: Step 1: Inject fracturing fluid (71) carrying temporary plugging agent (72) into the fracture simulation device (10) through the fracturing fluid simulation injection device (20). The fracture simulation device includes at least two fracture simulation plates (11) arranged at an angle, and a simulated fracture is formed between the fracture simulation plates to simulate actual formation fractures. Step 2: Weigh the temporary plugging agent (72) that is flushed out from the side opening of the crack using the weighing device (30) below the crack simulation device (10), and identify the sealing structure characteristics of the temporary plugging agent in the crack through the camera device (40) at the front opening of the crack simulation device. Step 3: The amount of fracturing fluid (71) carrying temporary plugging agent (72) added is adjusted by the control device (60) connected to the fracturing fluid simulation injection device and the camera device (40) according to the plugging structure characteristics collected by the camera device (40); Step 4: Calculate the amount of temporary plugging agent added. The amount of temporary plugging agent added = the supply amount of temporary plugging agent (72) - the weighing mass of the temporary plugging agent weighing device (30).

9. The method for simulating the amount of temporary plugging agent added according to claim 8, characterized in that, The size of the simulated crack is adjusted by adjusting the inclination of two adjacent crack simulation plates (11), thereby simulating the effect of different crack heights on the amount of temporary plugging agent injected.

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