Testing system for enhancing permeability in real time through microwaves

Abstract

The invention belongs to the field of rock crack research experiments, and provides a microwave real-time permeability enhancement test system which comprises a microwave generator, a straight waveguide, a global irradiation coaxial antenna mechanism and a permeability detection mechanism, the output end of the microwave generator is connected with the straight waveguide, and the output end of the straight waveguide is provided with the global irradiation coaxial antenna mechanism; the annular assembly comprises a ceramic inner ring and a metal outer ring; a microwave irradiation opening is formed between every two adjacent annular assemblies so that microwaves can irradiate outwards in the microwave irradiation openings. Diffusion microwaves are formed in the sample, the microwaves are uniformly dispersed in all directions in the sample through the microwave irradiation port, so that the microwave action range is widened, and the flow change is recorded in real time in the process to comprehensively reflect the permeability of the sample; and real-time evolution characteristics of permeability characteristics in a reservoir microwave transformation process in an in-situ state are simulated.

Description

Technical Field

[0001] The invention belongs to the field of rock crack research experiments, and in particular relates to a microwave real-time permeability enhancement test system. Background Art

[0002] Deep unconventional natural gas reservoirs generally have low permeability, low porosity, high water saturation, and large burial depth. Therefore, deep unconventional natural gas reservoir transformation and permeability enhancement are the top priority for their efficient development. Microwave, as a new fracturing technology with a wide fracturing range, high heating efficiency, and no secondary pollution, is expected to solve the above problems.

[0003] At present, the feasibility of microwave fracturing and permeability enhancement has been demonstrated by most studies based on permeability tests on rocks after the action of the cavity. However, deep reservoirs are in an in-situ stress environment, which is significantly different from the experimental principle of "microwave first, then permeability" at the laboratory scale. At the same time, existing studies are all based on conventional triaxial tests, and the impact of mining disturbances on reservoir transformation and permeability enhancement has not yet been considered. Therefore, in order to further explore the real-time permeability evolution characteristics of reservoirs during microwave action and the impact of mining disturbances on microwave fracturing and permeability enhancement, the patent of this invention has developed a microwave real-time transformation and permeability enhancement system that takes stress state into consideration, creatively combining microwave and permeability systems to simulate the real-time evolution characteristics of permeability characteristics during microwave transformation of reservoirs in the in-situ state. This invention is of great significance for the application of microwave technology to deep reservoir transformation and permeability enhancement, and provides technical support for promoting the industrial application of microwaves. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a microwave real-time permeability enhancement test system to solve the problems in the prior art. The technical solution adopted by the present invention is: A microwave real-time permeability enhancement test system, comprising: a microwave generator, a straight waveguide, a full-range irradiation coaxial antenna mechanism and a permeability detection mechanism; 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 drill hole is provided on the sample, and the global illumination coaxial antenna mechanism comprises a waveguide tube, a metal shaft body and a ring component, one end of the waveguide tube is connected to the output end of the straight waveguide, and the other end of the waveguide tube faces the drill hole; one end of the metal shaft body is located in the drill hole, and the other end thereof passes through the waveguide tube and is connected to the straight waveguide through a waveguide coaxial converter, and a plurality of the ring components are provided on the metal shaft body, and the plurality of the ring components are all located in the drill hole; A microwave irradiation port is formed between two adjacent annular components, so that microwaves can be irradiated outwards from the microwave irradiation port; The annular component comprises 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; The permeability detection mechanism is used to output the flowing medium to one side of the sample and collect the flow rate of the flowing medium permeated from the other side of the sample.

[0005] Furthermore, the straight waveguide is a rectangular waveguide, and its dimensions satisfy the following formula conditions: , Integration gives: , in, 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.

[0006] Further, the permeability testing machine includes an input part and an output part; The input part includes an input flow meter and a first pressing plate, the first pressing plate is attached to one side of the sample, the first pressing plate is provided with a first slot body, a first cavity is formed between the first slot body and the wall surface of the sample, and the first cavity is filled with a first porous medium; the first cavity is connected to the flow medium input device through the input flow meter for inputting the flow medium; The output part includes a first output flow meter and a second pressing plate, the second pressing plate is attached to the other side of the sample, the second pressing plate is provided with a second slot body, a second cavity is formed between the second slot body and the wall surface of the sample, and the second cavity is filled with a second porous medium; the second cavity is connected to the outside through the first output flow meter; The output parts are symmetrically arranged in two in a vertical direction and are distributed on the upper and lower sides of the drilled hole.

[0007] Furthermore, the input part further comprises a first pressurizing device, and an output end of the first pressurizing device is fixedly connected to the first pressing plate, so as to push the first pressing plate to extrude the sample; The output part further comprises a second pressurizing device, the output end of which is fixedly connected to the second pressing plate, so as to push the second pressing plate to squeeze the sample; The first pressing plate and the second pressing plate are distributed on both vertical surfaces of the sample, and the top and bottom surfaces of the sample are both provided with third pressing plates, and the two third pressing plates are respectively fixedly connected to the output end of the third pressurizing device and the output end of the fourth pressurizing device.

[0008] Furthermore, the inner side surface of the first pressing plate is fixedly connected to a plurality of first columns, the inner side surface of the second pressing plate is fixedly connected to a plurality of second columns, and the first columns and the second columns respectively abut against the wall surface of the sample.

[0009] Furthermore, arc-shaped openings are respectively provided on opposite sides of the two second pressure plates, and the arc-shaped openings of the two second pressure plates jointly limit a sealing sleeve, and the sealing sleeve is provided at the opening of the borehole, and the sealing sleeve is concentrically arranged with the borehole, and a sealing support glass ring is provided in the sealing sleeve, and the sealing support glass ring can be slidably sleeved on the metal shaft body, and a second output flowmeter is provided in the sealing sleeve, and the second output flowmeter is connected to the inside of the sealing sleeve, and the second output flowmeter is located between the sealing support glass ring and the borehole opening.

[0010] Furthermore, a supporting clamp ring is provided at the inner end of the drill hole, and one end of the metal shaft body located in the drill hole is inserted into the supporting clamp ring.

[0011] Furthermore, the annular assembly also includes a glass limiting rod and a limiting bolt. A radial through hole is opened on the ceramic inner ring, the glass limiting rod is inserted into the through hole, the limiting bolt is threadedly connected to the metal outer ring, and the end of the limiting bolt abuts against the glass limiting rod.

[0012] The present invention has the following beneficial effects: the present invention forms diffuse microwaves inside the sample and evenly disperses the microwaves to all directions inside the sample through the microwave irradiation port, thereby increasing the microwave action range, and in this process, records the flow changes in real time to comprehensively reflect the permeability of the sample, simulating the real-time evolution characteristics of the permeability characteristics during microwave transformation of the reservoir in situ, and being able to form a more realistic test environment. The experiment is of great significance for applying microwave technology to deep reservoir transformation and permeability enhancement, and provides technical support for promoting the industrial application of microwaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of a rectangular straight waveguide; Figure 3 It is a schematic diagram of the specific structure; Figure 4 yes Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 It is a schematic diagram of the connection relationship of the ring components; Figure 6 It is a schematic diagram of the matching relationship of the arc opening; Figure 7 It is a schematic diagram of the electromagnetic field distribution characteristics of the ring component. DETAILED DESCRIPTION

[0014] The following will be combined with the embodiments of the present invention Figure 1-Figure 7 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0015] A microwave real-time permeability enhancement test system, comprising: a microwave generator, a straight waveguide 12, a full-range irradiation coaxial antenna mechanism and a 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 borehole is provided on the sample 1, and the global illumination coaxial antenna mechanism includes a waveguide tube 2, a metal shaft 3 and an annular component 8, one end of the waveguide tube 2 is connected to the output end of the straight waveguide 12, and the other end of the waveguide tube 2 faces the borehole; one end of the metal shaft 3 is located in the borehole, and the other end thereof passes through the waveguide tube 2 and is connected to the straight waveguide 12 through a waveguide coaxial converter, and a plurality of the annular components 8 are provided on the metal shaft 3, and the plurality of the annular components 8 are all located in the borehole; A microwave irradiation port is formed between two adjacent annular components 8, so that microwaves can be irradiated outwards from the microwave irradiation port; The annular component 8 includes a ceramic inner ring 81 and a metal outer ring 82, wherein 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 detection mechanism is used to output the flowing medium to one side of the sample 1 and collect the flow rate of the flowing medium permeated from the other side of the sample 1.

[0016] The microwave power supply and the microwave generator 4 are prior art. The microwave power supply and the microwave generator 4 are connected by cables. The microwave power supply is connected to the power supply. The microwave power supply is controlled by a high-frequency power switch to supply power to the microwave generator 4. The microwave generator 4 has an excitation cavity, a magnetron and a filament power supply. The filament power supply is first preheated by the microwave power supply. During preheating, the filament power supply heats the magnetron cathode through an electric current. When heated to a sufficiently high temperature, the magnetron cathode 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 to form a curved electron beam. The energy change generated by the interaction between the electron beam and the magnetic field generates microwave radiation. At this time, the microwave is a TEM mode. The microwave is propagated into the excitation cavity in the form of an electromagnetic wave. When the microwave is transmitted to the excitation cavity through a coupler, the coupler converts the TEM mode microwave into a TE mode through a specific guiding effect. 10 Module, (TE 10The mold has the characteristics of simple field structure, stability, wide frequency bandwidth and low loss), and is transmitted to a rectangular straight waveguide 12.

[0017] The metal shaft 3 is preferably a copper shaft. In the present invention, at least three annular components 8 are provided. The waveguide coaxial converter is a prior art, and its function is to convert the TE 10 The mode is converted into a TEM mode and transmitted in the metal shaft 3. The metal shaft 3 acts as a coaxial antenna and is a hollow structure. The TEM mode has no electric field and magnetic field along the direction of the metal shaft 3, and all electromagnetic fields diffuse radially. For the metal shaft 3, it can increase the microwave energy density between the metal shaft 3 and the straight waveguide 12 and the waveguide tube 2, and can form an induced current between the metal shaft 3 and the straight waveguide 12 and the waveguide tube 2, thereby assisting the forward transmission of microwaves. In the present invention, the main transmission part of the microwave is the transmission of the TEM mode in the metal shaft 3.

[0018] For reference Figure 7 The electromagnetic field distribution characteristics of the annular components 8 are as follows: since the annular components 8 are arranged equidistantly on the metal shaft 3, microwave irradiation ports are formed between the metal outer rings 82 on two adjacent annular components 8, and microwaves in the microwave irradiation port area are transmitted along the radial direction of the metal shaft 3 and toward the inner wall surface of the borehole. Therefore, the microwave irradiation ports formed by the equidistantly designed annular components 8 can play a role in microwave diffusion, so that microwaves are evenly irradiated onto the inner wall surface of the borehole.

[0019] The straight waveguide 12 is a rectangular waveguide. Considering that the microwave generator transmits TE 10 mode, so the rectangular straight waveguide 12 needs to meet the following requirements: (1) only transmit the main mode TE 10 ; (2) Sufficient power capacity (increase power capacity while avoiding breakdown); (3) Low loss. The specific size satisfies the following calculation formula: , Integration gives: , in, f is the microwave frequency, a is the width of the straight waveguide, b is the height of the straight waveguide; λ is the microwave wavelength, and the calculation formula is: c=λf, f is the microwave power frequency, for example, for a 2.45GHz microwave power supply, λ=12.24cm is calculated; the derivation process of the above formula involves the analysis of the electromagnetic field, and the reasons for the selection of parameters are: 1. The designed waveguide needs to suppress high-order modes, 2. The loss is small, and 3. The transmission power is large.

[0020] like Figure 3-Figure 6 , the permeability testing machine comprises an input part and an output part; The input part includes an input flow meter 91 and a first pressing plate 4. The first pressing plate 4 is attached to one side of the sample 1. The first pressing plate 4 is provided with a first slot body. A first cavity is formed between the first slot body and the wall surface of the sample 1. The first cavity is filled with a first porous medium 42. The first cavity is connected to the flow medium input device through the input flow meter 91 for inputting the flow medium. The output part includes a first output flow meter 92 and a second pressing plate 5, wherein the second pressing plate 5 is attached to the other side of the sample 1, and the second pressing plate 5 is provided with a second slot body, wherein a second cavity is formed between the second slot body and the wall surface of the sample 1, and 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 parts are symmetrically arranged in two in a vertical direction and are distributed on the upper and lower sides of the drilled hole.

[0021] Specifically, the first pressing plate 4 and the second pressing plate 5 are both buckled on the outer wall of the sample 1. The first porous medium 42 and the second porous medium 52 are both existing technologies, and can be honeycomb seepage gaskets, porous plates, rock particles, etc., and their pores are much larger than the pores of the sample 1. The purpose of the first porous medium 42 and the second porous medium 52 is to make the flow medium flow as evenly as possible on the outer wall of the sample 1, so that the flow medium evenly enters the interior of the sample 1 to complete the penetration effect.

[0022] Preferably, the flowing medium is gas, and the flowing medium input device can be a high-pressure gas tank, an air pump or other equipment, which fills the gas into the input pipe, the input pipe is fixedly connected to the first pressure plate 4 and connected to the first cavity, and the input flow meter 91 is arranged on the input pipe to monitor the input flow. The output pipe is fixedly connected to the second pressure plate 5, and the input flow meter 91 is arranged on the output pipe, and the output pipe is open to connect to the outside air. By calculating the difference between the first output flow meter 92 and the input flow meter 91, the permeability of the sample 1 can be intuitively reflected, and by comparing multiple different samples 1, enabling different microwave powers, and setting a single variable, the permeability difference of different samples 1 under the influence of different microwave powers can be intuitively compared.

[0023] Furthermore, the input part further includes a first pressurizing device 61, and an output end of the first pressurizing device 61 is fixedly connected to the first pressing plate 4, so as to push the first pressing plate 4 to squeeze the sample 1; The output part further includes a second pressurizing device 62, the output end of which is fixedly connected to the second pressing plate 5, so as to push the second pressing plate 5 to squeeze the sample 1; The first pressing plate 4 and the second pressing plate 5 are distributed on the vertical surfaces on both sides of the sample 1. The top and bottom surfaces of the sample 1 are both provided with third pressing plates. The two third pressing plates are respectively fixedly connected to the output end of the third pressurizing device 63 and the output end of the fourth pressurizing device 64.

[0024] 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. The purpose is to pressurize the sample 1 to simulate the formation pressure environment. The pressure output directions of the four pressurizing devices are all toward 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.

[0025] Furthermore, a plurality of first columns 41 are fixedly connected to the inner side surface of the first pressing plate 4 , and a plurality of second columns 51 are fixedly connected to the inner side surface of the second pressing plate 5 . The first columns 41 and the second columns 51 abut against the wall surface of the sample 1 , respectively.

[0026] 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 evenly compressed.

[0027] Furthermore, arc-shaped openings are respectively provided on opposite sides of the two second pressure plates 5, and the arc-shaped openings of the two second pressure plates 5 jointly limit a sealing sleeve 10, which is provided at the opening of the borehole, and the sealing sleeve 10 is concentrically arranged with the borehole, and a sealing support glass ring 12 is provided inside the sealing sleeve 10, and the sealing support glass ring 12 is slidably sleeved on the metal shaft body 3, and a second output flowmeter 11 is provided on the sealing sleeve 10, and the second output flowmeter 11 is connected to the inside of the sealing sleeve 10, and the second output flowmeter 11 is located between the sealing support glass ring 12 and the borehole opening.

[0028] The arc-shaped openings of the two second pressing plates 5 are arranged opposite to each other, and the sealing sleeve 10 is constrained and clamped therein, so as to fix the sealing sleeve 10. The flow medium that penetrates into the borehole from the inside of the sample 1 first enters the borehole, then enters the sealing sleeve 10, and is output through the second output flowmeter 11. The collection of this part of the flow can more effectively and intuitively reflect the permeability inside the sample 1.

[0029] 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 with the inner wall of the sealing sleeve 10 through a sealing coating, a sealing ring and other components, and a sealing coating, a sealing ring and other components can also be provided between the arc opening and the outer wall of the sealing sleeve 10.

[0030] One end of the waveguide tube 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 tube 2 abuts against the limiting protrusion 13, and the limiting protrusion 13 is fixedly connected to the inner wall surface of the sealing sleeve 10.

[0031] In addition, the sealing structure of the present invention can also adopt the following embodiments: A first rubber sealing sleeve is sleeved on the end of the waveguide tube 2, and the first rubber sealing sleeve is located between the outer wall surface of the waveguide tube 2 and the inner wall surface of the sealing sleeve 10, thereby forming a sealing structure; a second rubber sealing sleeve is sleeved on the sealing sleeve 10, and 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.

[0032] Furthermore, a supporting clamp ring 7 is provided at the inner end of the drill hole, and one end of the metal shaft body 3 located in the drill hole is inserted into the supporting clamp ring 7 .

[0033] The support clamp ring 7 is located at the innermost end of the borehole and can be placed in the borehole in advance, and then the metal shaft body 3 is inserted into the borehole. The size of the support clamp ring 7 is adapted to the borehole. The metal shaft body 3 is supported by the support clamp ring 7 and the sealing support glass ring 12, so that its axis is kept horizontal, and the metal shaft body 3 and the waveguide 2 are coaxially arranged. In addition, the metal shaft body 3 can slide in the sealing support glass ring 12, adjust the position of the straight waveguide 12, and select waveguides 2 of different lengths to adjust the stroke of the metal shaft body 3 inserted into the borehole to adapt to boreholes of different depths.

[0034] Furthermore, the annular component 8 also includes a glass limiting rod 83 and a limiting bolt 84. The ceramic inner ring 81 is provided with a radial through hole, and the glass limiting rod 83 is inserted into the through hole. The metal outer ring 82 is threadedly connected to the limiting bolt 84, and the end of the limiting bolt 84 abuts against the glass limiting rod 83.

[0035] By tightening the limit bolt 84, the limit bolt 84 squeezes the glass limit rod 83, and the glass limit rod 83 then squeezes the metal shaft 3, thereby forming an extrusion force between the metal shaft 3 and the glass limit rod 83. Under the action of the extrusion force, the position of the ring assembly 8 is fixed and cannot slide on the metal shaft 3. When the position of the ring assembly 8 needs to be adjusted, the limit bolt 84 can be loosened. The distance between two adjacent ring assemblies 8 can be adjusted according to the number of ring assemblies 8, so that multiple ring assemblies 8 are arranged at equal distances.

[0036] Acoustic emission probes can also be set on the front and back surfaces of sample 1. In order to ensure the monitoring effect, three acoustic emission probes are arranged in a positive and inverted triangle arrangement, respectively arranged on the front and back surfaces of the rock. The decibel threshold of the acoustic emission probe is adjusted to ensure that the interference of noise signals affecting the data accuracy is filtered out. When cracks appear inside the rock, an acoustic signal is generated. Six probes capture and locate the acoustic signal at the same time and record it in the acoustic emission software to record the moment of internal rupture of sample 1.

[0037] After the various instruments are connected, the present invention starts to set the microwave power, time, and pressure of the pressurizing device, and then starts the test, and the permeability of the sample 1 is comprehensively evaluated by recording the acoustic emission data and the flow meter data respectively.

[0038] The present invention forms diffuse microwaves inside the sample 1, and evenly disperses the microwaves to all directions inside the sample 1 through the microwave irradiation port, thereby increasing the microwave action range, and in this process, records the flow changes in real time to comprehensively reflect the permeability of the sample 1, simulating the real-time evolution characteristics of the permeability characteristics during microwave transformation of the reservoir in situ, and can form a more realistic test environment. This experiment is of great significance for applying microwave technology to deep reservoir transformation and permeability enhancement, and provides technical support for promoting the industrial application of microwaves.

[0039] The embodiments described above are only descriptions of the preferred modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A microwave real-time permeability enhancement test system, characterized in that: include: A microwave generator, a straight waveguide (12), a full-range irradiation coaxial antenna mechanism, and a 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 comprises a waveguide tube (2), a metal shaft (3) and an annular component (8), one end of the waveguide tube (2) is connected to the output end of the straight waveguide (12), and the other end of the waveguide tube (2) faces the drill hole; one end of the metal shaft (3) is located in the drill hole, and the other end thereof passes through the waveguide tube (2) and is connected to the straight waveguide (12) via a waveguide coaxial converter; a plurality of the annular components (8) are provided on the metal shaft (3), and the plurality of the annular components (8) are all located in the drill hole; A microwave irradiation port is formed between two adjacent annular components (8) for irradiating microwaves outward from the microwave irradiation port; The annular component (8) comprises a ceramic inner ring (81) and a metal outer ring (82), wherein 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 detection mechanism is used to output the flowing medium to one side of the sample (1) and to collect the flow rate of the flowing medium that permeates from the other side of the sample (1).

2. A microwave real-time permeability enhancement test system according to claim 1, characterized in that: The straight waveguide is a rectangular waveguide, and its dimensions satisfy the following formula conditions: ， Integration gives: ， in, 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 permeability enhancement test system according to claim 1 is characterized in that: The permeability testing machine includes an input part and an output part; The input part comprises an input flow meter (91) and a first pressing plate (4), wherein the first pressing plate (4) is attached to one side of the sample (1), the first pressing plate (4) is provided with a first slot body, a first cavity is formed between the first slot body and the wall surface of the sample (1), and 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 flowing medium; The output part comprises a first output flow meter (92) and a second pressing plate (5), wherein the second pressing plate (5) is attached to the other side of the sample (1), the second pressing plate (5) is provided with a second groove body, a second cavity is formed between the second groove body and the wall surface of the sample (1), and 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 parts are symmetrically arranged in two in a vertical direction and are distributed on the upper and lower sides of the drilled hole.

4. A microwave real-time permeability enhancement test system according to claim 3, characterized in that: The input part further comprises a first pressurizing device (61), the output end of the first pressurizing device (61) being fixedly connected to the first pressing plate (4) so ​​as to push the first pressing plate (4) to extrude the sample (1); The output part further comprises a second pressurizing device (62), wherein an output end of the second pressurizing device (62) is fixedly connected to the second pressing plate (5) so as to push the second pressing plate (5) to extrude the sample (1); The first pressing plate (4) and the second pressing plate (5) are distributed on the vertical surfaces on both sides of the sample (1), and the top surface and the bottom surface of the sample (1) are both provided with a third pressing plate, and the two third pressing plates are respectively fixedly connected to the output end of the third pressurizing device (63) and the output end of the fourth pressurizing device (64).

5. A microwave real-time permeability enhancement test system according to claim 4, characterized in that: The inner side surface of the first pressing plate (4) is fixedly connected to a plurality of first columns (41), and the inner side surface of the second pressing plate (5) is fixedly connected to a plurality of second columns (51), and the first columns (41) and the second columns (51) respectively abut against the wall surface of the sample (1).

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

7. The microwave real-time permeability enhancement test system according to claim 1, characterized in that: A supporting clamp ring (7) is provided at the inner end of the drill hole, and one end of the metal shaft body (3) located in the drill hole is inserted into the supporting clamp ring (7).

8. The microwave real-time permeability enhancement test system according to claim 1, characterized in that: The annular assembly (8) further comprises a glass limiting rod (83) and a limiting bolt (84); a through hole in a radial direction is provided on the ceramic inner ring (81); the glass limiting rod (83) is inserted into the through hole; the limiting bolt (84) is threadedly connected to the metal outer ring (82); and the end of the limiting bolt (84) abuts against the glass limiting rod (83).

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