Test system for real-time permeability enhancement based on microwaves

Abstract

The present invention belongs to the field of rock mass crack research experiments. Provided is a test system for real-time permeability enhancement based on microwaves. The test system comprises: a microwave generator, a straight waveguide, an omnidirectional-irradiation coaxial antenna mechanism and a permeability test mechanism, wherein an output end of the microwave generator is connected to the straight waveguide, and an output end of the straight waveguide is provided with the omnidirectional-irradiation coaxial antenna mechanism; each annular assembly comprises a ceramic inner ring and a metal outer ring; and a microwave irradiation opening is formed between two adjacent annular assemblies, such that microwaves irradiate outwards via the microwave irradiation opening. By means of the present invention, diffused microwaves are formed inside a specimen, and the microwaves are uniformly distributed in all directions inside the specimen via the microwave irradiation opening, thereby expanding the microwave action range; and during the process, flow rate changes are recorded in real time, so as to comprehensively reflect the permeability of the specimen, thereby simulating the real-time evolution characteristics of permeability during the in-situ microwave modification of a reservoir.

Description

A microwave-enhanced real-time permeability testing system Technical Field

[0001] This invention belongs to the field of rock mass crack research experiments, specifically relating to a microwave real-time permeability enhancement test system. Background Technology

[0002] Deep unconventional natural gas reservoirs are generally characterized by low permeability, low porosity, high water saturation, and large burial depths. Therefore, permeability enhancement and stimulation of deep unconventional natural gas reservoirs is the primary task for their efficient development. Microwave fracturing, as a novel fracturing technology with a wide fracturing range, high heating efficiency, and no secondary pollution, holds promise for solving these challenges.

[0003] Current research demonstrating the feasibility of microwave-induced fracturing and permeability enhancement is largely based on permeability-related tests conducted on rocks after cavity treatment. However, deep reservoirs are typically in in-situ stress environments, which differs significantly from the laboratory-scale principle of "microwave first, then permeation." Furthermore, existing studies primarily focus on conventional triaxial tests and do not consider the impact of mining disturbances on reservoir enhancement. Therefore, to further explore the real-time permeability evolution characteristics of reservoirs during microwave treatment and the influence of mining disturbances on microwave-induced fracturing and permeability enhancement, this invention patent develops a real-time microwave enhancement system that considers stress states. It creatively combines microwave and permeation systems to simulate the real-time evolution of permeability characteristics during in-situ microwave enhancement of reservoirs. This invention is of great significance for applying microwave technology to deep reservoir enhancement and provides technical support for promoting the industrial application of microwave technology. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a microwave real-time enhanced permeability testing system to solve the problems in the prior art. The technical solution adopted by this invention is as follows:

[0005] A microwave-enhanced real-time permeability testing system includes: a microwave generator, a straight waveguide, a full-area illumination coaxial antenna mechanism, and a permeability detection mechanism;

[0006] The output end of the microwave generator is connected to the straight waveguide, and the output end of the straight waveguide is provided with the global illumination coaxial antenna mechanism; a drilled hole is provided on the sample, and the global illumination coaxial antenna mechanism includes a waveguide, a metal shaft, and a ring assembly. One end of the waveguide is connected to the output end of the straight waveguide, and the other end of the waveguide faces the drilled hole; one end of the metal shaft is located inside the drilled hole, and the other end passes through the waveguide and is connected to the straight waveguide through a waveguide-coaxial converter. Multiple ring assemblies are provided on the metal shaft, and all of the multiple ring assemblies are located inside the drilled hole;

[0007] A microwave irradiation port is formed between two adjacent annular components for microwave irradiation outward from within the microwave irradiation port;

[0008] The annular assembly includes a ceramic inner ring and a metal outer ring, wherein the ceramic inner ring is sleeved on the metal shaft and the metal outer ring is sleeved on the ceramic inner ring;

[0009] The permeability testing mechanism is used to output the flowing medium to one side of the sample and collect the flow rate of the flowing medium that permeates from the other side of the sample.

[0010] Furthermore, the straight waveguide is a rectangular waveguide, and its dimensions satisfy the following formula conditions: λ / 2 < a < λ, 0 < b < λ / 2, 0.6λ < a < λ, b = a / 2, a ≥ 0.7λ.

[0011] Integration yields: a = 0.7λ, b = (0.4 ~ 0.5)a

[0012] Where f is the microwave frequency, a is the width of the straight waveguide, b is the height of the straight waveguide, and λ is the microwave wavelength.

[0013] Furthermore, the permeability testing machine includes an input section and an output section;

[0014] The input section includes an input flow meter and a first pressure plate. The first pressure plate is attached to one side of the sample and has a first groove. A first cavity is formed between the first groove and the wall of the sample. The first cavity is filled with a first porous medium. The first cavity is connected to a flowing medium input device through the input flow meter for inputting the flowing medium.

[0015] The output section includes a first output flow meter and a second pressure plate. The second pressure plate is attached to the other side of the sample. The second pressure plate is provided with a second groove, and a second cavity is formed between the second groove and the wall of the sample. The second cavity is filled with a second porous medium. The second cavity is connected to the outside through the first output flow meter.

[0016] The output section is arranged symmetrically in two parts, and is distributed on the upper and lower sides of the borehole.

[0017] Furthermore, the input section also includes a first pressurizing device, the output end of which is fixedly connected to the first pressure plate for pushing the first pressure plate to compress the sample;

[0018] The output section also includes a second pressurizing device, the output end of which is fixedly connected to the second pressure plate for pushing the second pressure plate to compress the sample;

[0019] The first pressure plate and the second pressure plate are distributed on both vertical surfaces of the sample. The top and bottom surfaces of the sample are provided with a third pressure plate. The two third pressure plates are respectively fixedly connected to the output end of the third pressure device and the output end of the fourth pressure device.

[0020] Furthermore, multiple first columns are fixedly connected to the inner side of the first pressure plate, and multiple second columns are fixedly connected to the inner side of the second pressure plate, with the first columns and the second columns respectively abutting against the wall surface of the sample.

[0021] Furthermore, each of the two second pressure plates has an arc-shaped opening on one side opposite to the other. The arc-shaped openings of the two second pressure plates together limit the sealing sleeve. The sealing sleeve is located at the opening of the borehole and is concentric with the borehole. A sealing support glass ring is provided inside the sealing sleeve and is slidably fitted onto the metal shaft. A second output flow meter is provided in the sealing sleeve and communicates with the interior of the sealing sleeve. The second output flow meter is located between the sealing support glass ring and the borehole opening.

[0022] Furthermore, a support retaining ring is provided at the inner end of the drill hole, and one end of the metal shaft located inside the drill hole is inserted into the support retaining ring.

[0023] Furthermore, the annular assembly also includes a glass limiting rod and a limiting bolt. A radial through hole is formed on the inner ceramic ring, and the glass limiting rod is inserted into the through hole. The limiting bolt is threaded onto the outer metal ring, and the end of the limiting bolt abuts against the glass limiting rod.

[0024] The present invention has the following beneficial effects: By forming diffused microwaves inside the sample and dispersing the microwaves uniformly in all directions inside the sample through the microwave irradiation port, the microwave action range is improved. During this process, the flow rate change is recorded in real time to comprehensively reflect the permeability of the sample. This invention simulates the real-time evolution characteristics of permeability during in-situ microwave modification of reservoirs and can form a more realistic experimental environment. This experiment is of great significance for applying microwave technology to deep reservoir modification and permeability enhancement and provides technical support for promoting the industrial application of microwaves. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of a rectangular straight waveguide;

[0027] Figure 3 is a schematic diagram of the specific structure;

[0028] Figure 4 is an enlarged view of point A in Figure 3;

[0029] Figure 5 is a schematic diagram of the connection relationship of the ring components;

[0030] Figure 6 is a schematic diagram of the fitting relationship of the arc-shaped opening;

[0031] Figure 7 is a schematic diagram of the electromagnetic field distribution characteristics of the ring component. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to Figures 1-7 in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0033] A microwave-enhanced real-time permeability testing system includes: a microwave generator, a straight waveguide 12, a full-area illumination coaxial antenna mechanism, and a permeability detection mechanism;

[0034] The output end of the microwave generator is connected to the straight waveguide 12, and the output end of the straight waveguide 12 is provided with the global illumination coaxial antenna mechanism; a drilled hole is provided on the sample 1, and the global illumination coaxial antenna mechanism includes a waveguide 2, a metal shaft 3, and a ring assembly 8. One end of the waveguide 2 is connected to the output end of the straight waveguide 12, and the other end of the waveguide 2 faces the drilled hole; one end of the metal shaft 3 is located inside the drilled hole, and the other end passes through the waveguide 2 and is connected to the straight waveguide 12 through a waveguide coaxial converter. Multiple ring assemblies 8 are provided on the metal shaft 3, and all of the multiple ring assemblies 8 are located inside the drilled hole;

[0035] A microwave irradiation port is formed between two adjacent annular components 8 for microwaves to irradiate outward from within the microwave irradiation port;

[0036] The annular component 8 includes a ceramic inner ring 81 and a metal outer ring 82. The ceramic inner ring 81 is sleeved on the metal shaft 3, and the metal outer ring 82 is sleeved on the ceramic inner ring 81.

[0037] The permeability testing mechanism is used to output the flowing medium to one side of the sample 1 and collect the flow rate of the flowing medium that permeates from the other side of the sample 1.

[0038] The microwave power supply and microwave generator 4 are existing technologies. The microwave power supply and microwave generator 4 are connected by a cable. The microwave power supply is connected to a power source. A high-frequency power switch controls the microwave power supply to power the microwave generator 4. The microwave generator 4 contains an excitation cavity, a magnetron, and a filament power supply. First, the microwave power supply preheats the filament power supply. During preheating, the filament power supply heats the cathode of the magnetron through current. When heated to a sufficiently high temperature, the cathode of the magnetron generates an electron beam. The electron beam is emitted from the accelerating electrode and guided by the magnetic field generated by the magnetic field ring, forming a bent electron beam. The energy change generated by the interaction between this electron beam and the magnetic field produces microwave radiation. At this time, the microwave is in TEM mode. The microwave propagates into the excitation cavity in the form of electromagnetic waves. When the microwave is transmitted into the excitation cavity through a coupler, the coupler converts the TEM mode microwave into TE mode through a specific guiding action. 10 Model, (TE) 10 The mold has the characteristics of simple and stable field structure, wide bandwidth and low loss, and transmits to the rectangular straight waveguide 12.

[0039] The metal shaft 3 is preferably a copper shaft. In this invention, at least three annular components 8 are provided. The waveguide coaxial converter is existing technology; its function is to convert the TE in the straight waveguide 12... 10 The microwave mode is converted into a TEM mode and transmitted within the metal shaft 3. The metal shaft 3 functions as a coaxial antenna and has a hollow structure. The TEM mode has no electric or magnetic field along the direction of the metal shaft 3; all electromagnetic fields diffuse radially. The metal shaft 3 increases the microwave energy density between itself and the straight waveguide 12 and waveguide 2, and can induce a current between them, thus aiding microwave transmission. In this invention, the main microwave transmission component is the TEM mode transmission within the metal shaft 3.

[0040] Referring to the electromagnetic field distribution characteristics of the annular components 8 in Figure 7, since the annular components 8 are equidistantly arranged on the metal shaft 3, a microwave irradiation port is formed between the outer metal rings 82 of two adjacent annular components 8. The microwaves in the microwave irradiation port area are transmitted radially along the metal shaft 3 and toward the inner wall of the borehole. Therefore, the microwave irradiation port formed by the equidistantly designed annular components 8 can play a role in microwave diffusion, so that the microwaves are uniformly irradiated onto the inner wall of the borehole.

[0041] The straight waveguide 12 is a rectangular waveguide, taking into account the microwave generator transmitting TE. 10 Therefore, the rectangular straight waveguide 12 needs to satisfy: (1) Only transmit the main mode TE. 10 (2) Sufficient power capacity (increasing power capacity while avoiding breakdown); (3) Low loss. Specific dimensions satisfy the following calculation formula: λ / 2<a<λ 0<b<λ / 2 0.6λ<a<λ b=a / 2 a≥0.7λ

[0042] Integration yields: a = 0.7λ, b = (0.4 ~ 0.5)a

[0043] Where f is the microwave frequency, a is the width of the straight waveguide, and b is the height of the straight waveguide; λ is the microwave wavelength, calculated by the formula: c = λf, where f is the microwave power supply frequency. For example, for a 2.45 GHz microwave power supply, λ = 12.24 cm is calculated. The derivation of the above formula involves electromagnetic field analysis. The reasons for selecting the parameters are: 1. The waveguide in this design needs to suppress higher-order modes; 2. Low loss; 3. High transmission power.

[0044] As shown in Figures 3-6, the permeability testing machine includes an input section and an output section;

[0045] The input section includes an input flow meter 91 and a first pressure plate 4. The first pressure plate 4 is attached to one side of the sample 1. The first pressure plate 4 is provided with a first groove, and a first cavity is formed between the first groove and the wall of the sample 1. The first cavity is filled with a first porous medium 42. The first cavity is connected to a flowing medium input device through the input flow meter 91 for inputting the flowing medium.

[0046] The output section includes a first output flow meter 92 and a second pressure plate 5. The second pressure plate 5 is attached to the other side of the sample 1. The second pressure plate 5 is provided with a second groove, and a second cavity is formed between the second groove and the wall of the sample 1. The second cavity is filled with a second porous medium 52. The second cavity is connected to the outside through the first output flow meter 92.

[0047] The output section is arranged symmetrically in two parts, and is distributed on the upper and lower sides of the borehole.

[0048] Specifically, both the first pressure plate 4 and the second pressure plate 5 are fastened to the outer wall surface of the sample 1. The first porous medium 42 and the second porous medium 52 are both existing technologies and can be honeycomb permeation pads, porous plates, rock particles, etc. Their pores are much larger than those of the sample 1. The purpose of the first porous medium 42 and the second porous medium 52 is to make the flowing medium flow as uniformly as possible to the outer wall surface of the sample 1, so that the flowing medium can uniformly enter the interior of the sample 1 to complete the permeation.

[0049] Preferably, the flowing medium is gas, and the flowing medium input device can be a high-pressure gas tank, air pump, or other equipment, which fills the input pipe with gas. The input pipe is fixedly connected to the first pressure plate 4 and communicates with the first cavity. An input flow meter 91 is installed on the input pipe to monitor the input flow rate. An output pipe is fixedly connected to the second pressure plate 5, and the input flow meter 91 is installed on the output pipe, which is open to communicate with external air. By calculating the difference between the first output flow meter 92 and the input flow meter 91, the permeability of sample 1 can be directly reflected. By comparing multiple different samples 1, using different microwave powers, and setting a single variable, the permeability differences of different samples 1 under the influence of different microwave powers can be directly compared.

[0050] Furthermore, the input section also includes a first pressurizing device 61, the output end of which is fixedly connected to the first pressure plate 4 for pushing the first pressure plate 4 to compress the sample 1;

[0051] The output section also includes a second pressurizing device 62, the output end of which is fixedly connected to the second pressure plate 5 for pushing the second pressure plate 5 to compress the sample 1;

[0052] The first pressure plate 4 and the second pressure plate 5 are distributed on the vertical surfaces of both sides of the sample 1. The top and bottom surfaces of the sample 1 are provided with a third pressure plate. The two third pressure plates are respectively fixedly connected to the output end of the third pressure device 63 and the output end of the fourth pressure device 64.

[0053] The first pressurizing device 61, the second pressurizing device 62, the third pressurizing device 63, and the fourth pressurizing device 64 are all existing technologies and can be equipment such as jacks and hydraulic cylinders. Their purpose is to pressurize the sample 1 to simulate the formation pressure environment. The pressure output direction of the four pressurizing devices is all towards the sample 1, and the pressure is transmitted through the first pressure plate 4, the second pressure plate 5, and the third pressure plate, respectively.

[0054] Furthermore, a plurality of first columns 41 are fixedly connected to the inner side of the first pressure plate 4, and a plurality of second columns 51 are fixedly connected to the inner side of the second pressure plate 5. The first columns 41 and the second columns 51 respectively abut against the wall surface of the sample 1.

[0055] The purpose of the first column 41 and the second column 51 is to increase the force-bearing area so that the sample 1 is uniformly compressed.

[0056] Furthermore, each of the two second pressure plates 5 has an arc-shaped opening on one side opposite to the other. The arc-shaped openings of the two second pressure plates 5 together limit the sealing sleeve 10. The sealing sleeve 10 is located at the opening of the borehole. The sealing sleeve 10 is concentrically arranged with the borehole. A sealing support glass ring 12 is provided inside the sealing sleeve 10. The sealing support glass ring 12 is slidably sleeved on the metal shaft 3. A second output flow meter 11 is provided in the sealing sleeve 10. The second output flow meter 11 communicates with the interior of the sealing sleeve 10 and is located between the sealing support glass ring 12 and the borehole opening.

[0057] The arc-shaped openings of the two second pressure plates 5 are arranged opposite each other, constraining and locking the sealing sleeve 10 therein, thus fixing the sealing sleeve 10. The flowing medium that permeates from the inside of the sample 1 into the borehole first enters the borehole, then enters the sealing sleeve 10, and is output through the second output flow meter 11. Collecting this flow rate can more effectively and intuitively reflect the permeability inside the sample 1.

[0058] In addition, the sealing support glass ring 12 is made of glass and does not affect microwave transmission. The outer side of the sealing support glass ring 12 can be sealed to the inner wall of the sealing sleeve 10 through components such as sealing coatings and sealing rings. Sealing coatings and sealing rings can also be provided between the arc-shaped opening and the outer wall of the sealing sleeve 10.

[0059] The end of the waveguide 2 away from the straight waveguide 12 is inserted into the sealing sleeve 10 and abuts against the sealing support glass ring 12. The side of the sealing support glass ring 12 away from the waveguide 2 abuts against the limiting protrusion 13. The limiting protrusion 13 is fixedly connected to the inner wall surface of the sealing sleeve 10.

[0060] Alternatively, the sealing structure of the present invention can also be implemented in the following ways:

[0061] A first rubber sealing sleeve is fitted onto the end of the waveguide 2. The first rubber sealing sleeve is located between the outer wall surface of the waveguide 2 and the inner wall surface of the sealing sleeve 10, thereby forming a sealing structure. A second rubber sealing sleeve is fitted onto the sealing sleeve 10. The second rubber sealing sleeve is located between the outer wall surface of the sealing sleeve 10 and the inner wall surface of the arc-shaped opening, thereby forming a sealing structure.

[0062] Furthermore, a support retaining ring 7 is provided at the inner end of the drill hole, and one end of the metal shaft 3 located inside the drill hole is inserted into the support retaining ring 7.

[0063] The support ring 7 is located at the innermost end of the borehole and can be pre-inserted into the borehole before the metal shaft 3 is inserted. The size of the support ring 7 is adapted to the borehole. The metal shaft 3 is supported by the support ring 7 and the sealing support glass ring 12, keeping its axis horizontal and ensuring that the metal shaft 3 and the waveguide 2 are coaxial. Furthermore, the metal shaft 3 can slide within the sealing support glass ring 12, allowing adjustment of the position of the straight waveguide 12 and selection of waveguides 2 of different lengths to adjust the insertion stroke of the metal shaft 3 into the borehole, thus adapting to boreholes of different depths.

[0064] Furthermore, the annular assembly 8 also includes a glass limiting rod 83 and a limiting bolt 84. A radial through hole is formed on the ceramic inner ring 81, and the glass limiting rod 83 is inserted into the through hole. The limiting bolt 84 is threaded onto the metal outer ring 82, and the end of the limiting bolt 84 abuts against the glass limiting rod 83.

[0065] By tightening the limiting bolt 84, the limiting bolt 84 presses against the glass limiting rod 83, which in turn presses against the metal shaft 3. This creates a compressive force between the metal shaft 3 and the glass limiting rod 83, fixing the position of the annular assembly 8 and preventing it from sliding on the metal shaft 3. When the position of the annular assembly 8 needs adjustment, simply loosen the limiting bolt 84. The distance between adjacent annular assemblies 8 can be adjusted according to the number of annular assemblies 8, ensuring that multiple annular assemblies 8 are equidistant.

[0066] Acoustic emission probes can also be set on the front and back surfaces of sample 1. To ensure the monitoring effect, three acoustic emission probes are arranged in a symmetrical and inverted triangular pattern, respectively on the front and back surfaces of the rock. The decibel threshold of the acoustic emission probes is adjusted to ensure that noise interference is filtered out and the data accuracy is affected. When cracks appear inside the rock, an acoustic signal is generated. The six probes simultaneously capture and locate the acoustic signal and record it in the acoustic emission software to record the time of internal fracture of sample 1.

[0067] After connecting all the instruments, the present invention sets the microwave power, time, and pressure of the pressurizing device, and then begins the experiment. By recording acoustic emission data and flow meter data respectively, the permeability of sample 1 is comprehensively evaluated.

[0068] This invention improves the microwave's effective range by forming diffused microwaves inside the sample 1 and uniformly dispersing them in all directions within the sample 1 through a microwave irradiation port. Furthermore, it records flow rate changes in real time during this process to comprehensively reflect the permeability of the sample 1. This simulates the real-time evolution of permeability characteristics during in-situ microwave modification of reservoirs, creating a more realistic experimental environment. This experiment is of great significance for applying microwave technology to deep reservoir modification and permeability enhancement, and provides technical support for promoting the industrial application of microwave technology.

[0069] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A microwave-enhanced real-time permeability testing system, characterized in that, include: Microwave generator, straight waveguide (12), full-area illumination coaxial antenna mechanism and permeability detection mechanism; The output end of the microwave generator is connected to the straight waveguide (12), and the output end of the straight waveguide (12) is provided with the global illumination coaxial antenna mechanism; a drill hole is provided on the sample (1), and the global illumination coaxial antenna mechanism includes a waveguide (2), a metal shaft (3) and a ring assembly (8). One end of the waveguide (2) is connected to the output end of the straight waveguide (12), and the other end of the waveguide (2) faces the drill hole; one end of the metal shaft (3) is located inside the drill hole, and the other end passes through the waveguide (2) and is connected to the straight waveguide (12) through a waveguide coaxial converter. Multiple ring assemblies (8) are provided on the metal shaft (3), and multiple ring assemblies (8) are all located inside the drill hole; A microwave irradiation port is formed between two adjacent annular components (8) for microwaves to irradiate outward from within the microwave irradiation port; The annular assembly (8) includes a ceramic inner ring (81) and a metal outer ring (82). The ceramic inner ring (81) is sleeved on the metal shaft (3), and the metal outer ring (82) is sleeved on the ceramic inner ring (81). The permeability testing mechanism is used to output the flowing medium to one side of the sample (1) and collect the flow rate of the flowing medium that permeates from the other side of the sample (1).

2. The microwave real-time enhanced permeability testing system according to claim 1, characterized in that, The straight waveguide is a rectangular waveguide, and its dimensions satisfy the following formula conditions: λ / 2 < a < λ, 0 < b < λ / 2, 0.6λ < a < λ, b = a / 2, a ≥ 0.7λ. Integration yields: a = 0.7λ b = (0.4 ~ 0.5)a Where f is the microwave frequency, a is the width of the straight waveguide, b is the height of the straight waveguide, and λ is the microwave wavelength.

3. The microwave real-time enhanced permeability testing system according to claim 1, characterized in that, The permeability testing machine includes an input section and an output section; The input section includes an input flow meter (91) and a first pressure plate (4). The first pressure plate (4) is attached to one side of the sample (1). The first pressure plate (4) is provided with a first groove. A first cavity is formed between the first groove and the wall of the sample (1). The first cavity is filled with a first porous medium (42). The first cavity is connected to a flowing medium input device through the input flow meter (91) for inputting the flowing medium. The output section includes a first output flow meter (92) and a second pressure plate (5). The second pressure plate (5) is attached to the other side of the sample (1). The second pressure plate (5) is provided with a second groove. A second cavity is formed between the second groove and the wall of the sample (1). The second cavity is filled with a second porous medium (52). The second cavity is connected to the outside through the first output flow meter (92). The output section is arranged symmetrically in two parts, and is distributed on the upper and lower sides of the borehole.

4. The microwave real-time enhanced permeability testing system according to claim 3, characterized in that, The input section also includes a first pressurizing device (61), the output end of which is fixedly connected to the first pressure plate (4) for pushing the first pressure plate (4) to compress the sample (1); The output section also includes a second pressurizing device (62), the output end of which is fixedly connected to the second pressure plate (5) for pushing the second pressure plate (5) to squeeze the sample (1); The first pressure plate (4) and the second pressure plate (5) are distributed on the vertical surfaces of both sides of the sample (1). The top and bottom surfaces of the sample (1) are provided with a third pressure plate. The two third pressure plates are respectively fixedly connected to the output end of the third pressure device (63) and the output end of the fourth pressure device (64).

5. The microwave real-time enhanced permeability testing system according to claim 4, characterized in that, Multiple first columns (41) are fixedly connected to the inner side of the first pressure plate (4), and multiple second columns (51) are fixedly connected to the inner side of the second pressure plate (5). The first column (41) and the second column (51) respectively abut against the wall of the sample (1).

6. The microwave real-time enhanced permeability testing system according to claim 3, characterized in that, Two second pressure plates (5) are respectively provided with arc-shaped openings on opposite sides. The arc-shaped openings of the two second pressure plates (5) together limit the sealing sleeve (10). The sealing sleeve (10) is provided at the opening of the borehole. The sealing sleeve (10) is concentrically arranged with the borehole. A sealing support glass ring (12) is provided inside the sealing sleeve (10). The sealing support glass ring (12) is slidably sleeved on the metal shaft (3). A second output flow meter (11) is provided in the sealing sleeve (10). The second output flow meter (11) is connected to the inside of the sealing sleeve (10). The second output flow meter (11) is located between the sealing support glass ring (12) and the opening of the borehole.

7. The microwave real-time enhanced permeability testing system according to claim 1, characterized in that, A support ring (7) is provided at the inner end of the borehole, and one end of the metal shaft (3) located in the borehole is inserted into the support ring (7).

8. The microwave real-time enhanced permeability testing system according to claim 1, characterized in that, The annular assembly (8) further includes a glass limiting rod (83) and a limiting bolt (84). A radial through hole is opened on the ceramic inner ring (81), and the glass limiting rod (83) is inserted into the through hole. The limiting bolt (84) is threaded onto the metal outer ring (82), and the end of the limiting bolt (84) abuts against the glass limiting rod (83).

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