Resonance shock wave transformation device of coal bed gas reservoir

Abstract

The utility model discloses a resonance shock wave transformation device of a coal bed gas reservoir, which comprises a coal bed gas reservoir body, a transformation well is arranged in the coal bed gas reservoir body, a device frame body is arranged on the surface of the coal bed gas reservoir body at the position of the transformation well, a helium refrigerating machine is arranged on the other side of the device frame body, and a helium gas generator is arranged on the helium refrigerating machine. An energy accumulator is installed at the bottom of the device frame body, the bottom end of the energy accumulator extends into the transformation well and is provided with an energy controller, a high-frequency resonance shock wave generator is installed at the bottom end of the energy controller, and a shock wave emission head is installed at the bottom end of the high-frequency resonance shock wave generator. And a refrigeration sleeve body is fixed on the outer wall of the high-frequency resonance shock wave generator. According to the utility model, the helium refrigerating system is arranged to cool the piezoelectric ceramic transducer and the superconducting coil group, so that the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to coalbed gas reservoir reconstruction technology technical field, concretely is a kind of coalbed gas reservoir's resonance shock wave reconstruction device. BACKGROUND

[0002] Coalbed gas refers to the hydrocarbon gas with methane (CH4) as main component, mainly adsorbed on the surface of coal matrix particles, partially free in coal pore or dissolved in coalbed water, is the associated mineral resources of coal, belongs to the category of unconventional natural gas;But on the other hand, coalbed gas is also called coal mine gas, if not effectively drained and dredged before coal mining, it can bring unsafe factors for coal mining, seriously restricts the safety production of coal mine.Therefore, whether from the coalbed gas exploitation angle or from the coal mine gas control angle, it is necessary to carry out ground extraction to coalbed gas in the early stage of coal development.Although China has carried out large-scale coalbed gas resource exploration and development work at present, for the coalbed gas reservoir with low gas content in local area, due to the low rock permeability, the efficient utilization and development of local coalbed gas are limited.Therefore, coal rock often needs to be permeation-reformed to improve the gas production and gas production efficiency of coalbed gas.

[0003] At present, the relatively mature coalbed gas reservoir permeation means mainly includes hydraulic fracturing and shock wave reconstruction, these two means have obvious advantages, but also have certain technical disadvantages.Although hydraulic fracturing can realize relatively extensive reservoir reconstruction, hydraulic fracturing has closure condition, needs to use proppant material, and the reconstruction degree of hydraulic fracturing is often high, which can cause serious damage to coalbed gas reservoir and potential rock pressure risk to coal mining.As for shock wave reconstruction means, although it will not cause serious damage to coal rock reservoir, its reconstruction capacity is weak.Resonance shock wave reconstruction is a physical reconstruction technology for inducing coal body to generate microcracks and improve permeability by exciting coal inherent frequency through specific frequency mechanical wave, but it has high-temperature resistance limitation, and the high-frequency resonant cavity and piezoelectric ceramic transducer of resonance shock wave device generate a lot of heat during operation, which affects its service life, so it needs to be improved. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of coalbed gas reservoir's resonance shock wave reconstruction device to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a kind of coalbed gas reservoir's resonance shock wave reconstruction device, the inside of the coalbed gas reservoir body is provided with reconstruction well, and the surface of the coalbed gas reservoir body at the position of the reconstruction well is equipped with device frame body, the one side of the device frame body is equipped with well battery, the other side of the device frame body is equipped with helium refrigerator, the bottom of the device frame body is equipped with energy accumulator, and the bottom end of the energy accumulator extends to the inside of reconstruction well and is equipped with energy controller, the bottom end of the energy controller is equipped with high-frequency resonance shock wave generator, and the bottom end of the high-frequency resonance shock wave generator is equipped with shock wave emission head, the inside of the high-frequency resonance shock wave generator is provided with shock wave generation cavity, and the inside of the shock wave generation cavity is equipped with piezoelectric ceramic transducer, the bottom end of the piezoelectric ceramic transducer is equipped with superconducting coil group, refrigeration sleeve body is fixed on the outer wall of the high-frequency resonance shock wave generator, and flow guide channel is arranged on the inner wall of the refrigeration sleeve body.

[0006] Preferably, the shock wave emission head is provided with six groups and is distributed at equal intervals, and a tungsten carbide alloy layer is arranged on the outer surface of the shock wave emission head.

[0007] Preferably, the bottom of the high-frequency resonance shock wave generator is provided with a resonance cavity, and the inside of the resonance cavity is equipped with a shock wave amplifier.

[0008] Preferably, the refrigeration sleeve body is in annular columnar structure, and the inside of the refrigeration sleeve body is in hollow structure.

[0009] Preferably, a refrigeration gas conveying pipeline is installed on the outer wall of the top of the refrigeration sleeve body, and a refrigeration recovery pipeline is installed on the outer wall of the bottom of the refrigeration sleeve body, and the bottom end of the refrigeration gas conveying pipeline is connected with the refrigeration recovery pipeline.

[0010] Preferably, the top end of the output end refrigeration gas conveying pipeline of the helium refrigerator is connected, and the input end of the helium refrigerator is connected with the top end of the refrigeration recovery pipeline.

[0011] Preferably, the cross section of the flow guide channel is in semicircular structure, and the flow guide channel is spirally distributed on the inner surface of the refrigeration sleeve body.

[0012] Preferably, a temperature sensor is installed on one side of the top end of the refrigeration sleeve body, and the detection end of the temperature sensor extends to the inside of the refrigeration sleeve body.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The helium refrigerator reduces the temperature of helium by releasing helium from a high pressure state to a low pressure state through an expansion valve, realizes the refrigeration effect, and helium enters the flow guide channel in the inner wall of the refrigeration sleeve through the refrigeration gas pipeline, the cross section of the flow guide channel is a semicircular structure, the flow guide channel is spirally distributed on the inner surface of the refrigeration sleeve, guides helium to flow along the outer wall of the high-frequency resonance shock wave generator from top to bottom, and drives the heat inside the piezoelectric ceramic transducer and the superconducting coil group, prolongs the service life, and the helium flowing to the bottom of the flow guide channel is recovered to the inside of the helium refrigerator through the refrigeration recovery pipeline, facilitating the recovery of helium. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the utility model;

[0016] Figure 2 It is a high-frequency resonance shock wave generator amplification structural schematic diagram of the utility model;

[0017] Figure 3 It is a high-frequency resonance shock wave generator bottom view structural schematic diagram of the utility model;

[0018] Figure 4 It is a refrigeration sleeve structural schematic diagram of the utility model;

[0019] Figure 5 It is a Figure 3 Amplification structural schematic diagram of the utility model in A place.

[0020] In the figure: 1, coalbed gas reservoir body; 2, on-well battery pack; 3, reconstructed well; 4, device frame body; 5, energy accumulator; 6, helium refrigerator; 7, energy controller; 8, high-frequency resonance shock wave generator; 9, shock wave emission head; 10, refrigeration gas pipeline; 11, refrigeration recovery pipeline; 12, shock wave generation cavity; 13, piezoelectric ceramic transducer; 14, superconducting coil group; 15, resonance cavity; 16, shock wave amplifier; 17, refrigeration sleeve; 18, flow guide channel; 19, temperature sensor; 20, tungsten carbide alloy layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.

[0023] Please refer to Figures 1-5 The utility model provides an embodiment: a kind of coalbed gas reservoir's resonance shock wave reconstruction device, including coalbed gas reservoir body 1, the inside of coalbed gas reservoir body 1 is provided with reconstruction well 3, and the surface of coalbed gas reservoir body 1 at the position of reconstruction well 3 is equipped with device frame body 4, one side of device frame body 4 is equipped with well battery 2, the other side of device frame body 4 is equipped with helium refrigerator 6, the bottom of device frame body 4 is equipped with energy accumulator 5, and the bottom end of energy accumulator 5 extends to the inside of reconstruction well 3 and is equipped with energy controller 7, the bottom end of energy controller 7 is equipped with high-frequency resonance shock wave generator 8, and the bottom end of high-frequency resonance shock wave generator 8 is equipped with shock wave emission head 9;

[0024] Specifically, well battery 2 provides electric energy for high-frequency resonance shock wave generator 8, energy accumulator 5 stores energy, energy controller 7 controls the energy of high-frequency resonance shock wave generator 8, piezoelectric ceramic transducer 13 in the shock wave cavity 12 in high-frequency resonance shock wave generator 8 converts electric energy into high-frequency mechanical vibration wave, superconducting coil group 14 enhances magnetic field intensity to improve vibration energy transmission efficiency, shock wave amplifier 16 in resonance cavity 15 constrains and amplifies shock wave energy, and then six groups of shock wave emission head 9 at the bottom of high-frequency resonance shock wave generator 8 disperse shock wave to the inside of coalbed gas reservoir body 1;

[0025] In this process, low-frequency sweep is used to activate natural fissure, establish energy transmission channel, match inherent frequency to continuously impact to generate netted fissure, superimpose harmonic to expand crack radius, then through pulse type energy input, stabilize crack width, use the resonance of shock wave frequency and coal seam inherent frequency, enhance energy transmission, promote fissure expansion, when shock wave propagates in coal seam, stress wave is generated, leading to microfissure expansion and connection, improve permeability, shock wave can also accelerate coalbed gas desorption process, improve gas fluidity and recovery efficiency, the setting of tungsten carbide alloy layer 20 improves the corrosion resistance and wear resistance of shock wave emission head 9, prolongs service life;

[0026] The high-frequency resonance shock wave generator 8 is internally provided with a shock wave generation cavity 12, and the shock wave generation cavity 12 is internally installed with a piezoelectric ceramic transducer 13, the bottom end of the piezoelectric ceramic transducer 13 is installed with a superconducting coil group 14, the outer wall of the high-frequency resonance shock wave generator 8 is fixed with a refrigeration sleeve body 17, and the inner wall of the refrigeration sleeve body 17 is provided with a flow guide channel 18;

[0027] The shock wave emission head 9 is provided with six groups and is distributed at equal intervals, and the outer surface of the shock wave emission head 9 is provided with a tungsten carbide alloy layer 20;

[0028] The bottom of the high-frequency resonance shock wave generator 8 is provided with a resonance cavity 15, and the resonance cavity 15 is internally installed with a shock wave amplifier 16;

[0029] The refrigeration sleeve body 17 is an annular columnar structure, and the inside of the refrigeration sleeve body 17 is a hollow structure; the outer wall of the top of the refrigeration sleeve body 17 is installed with a refrigeration gas conveying pipeline 10, and the outer wall of the bottom of the refrigeration sleeve body 17 is installed with a refrigeration recovery pipeline 11, the bottom end of the refrigeration gas conveying pipeline 10 and the refrigeration recovery pipeline 11; one side of the top end of the refrigeration sleeve body 17 is installed with a temperature sensor 19, and the detection end of the temperature sensor 19 extends into the inside of the refrigeration sleeve body 17;

[0030] The cross section of the flow guide channel 18 is a semicircular structure, and the flow guide channel 18 is spirally distributed on the inner surface of the refrigeration sleeve body 17;

[0031] Specifically, the helium refrigerator 6 reduces the temperature of the helium gas by relaxing the helium gas from a high-pressure state to a low-pressure state through an expansion valve, thereby achieving a refrigeration effect, and the helium gas enters the flow guide channel 18 on the inner wall of the refrigeration sleeve body 17 through the refrigeration gas conveying pipeline 10. Since the cross section of the flow guide channel 18 is a semicircular structure, the flow guide channel 18 is spirally distributed on the inner surface of the refrigeration sleeve body 17, guiding the helium gas to flow from top to bottom along the outer wall of the high-frequency resonance shock wave generator 8, and driving the heat inside the high-frequency resonance shock wave generator 8, thereby cooling the piezoelectric ceramic transducer 13 and the superconducting coil group 14, prolonging their service life;

[0032] The spiral structure design of the flow guide channel 18 is beneficial to the close flow of the helium gas to the high-frequency resonance shock wave generator 8, enhances the heat exchange effect, and further improves the refrigeration effect;

[0033] The top end of the output refrigeration gas conveying pipeline 10 of the helium refrigerator 6 is connected, and the input end of the helium refrigerator 6 is connected to the top end of the refrigeration recovery pipeline 11;

[0034] The helium gas flowing to the bottom of the flow guide channel 18 is recovered to the inside of the helium refrigerator 6 from the refrigeration recovery pipeline 11, facilitating the recovery of the helium gas.

[0035] The embodiment of the application is used as follows: first, the battery pack 2 on the well provides electric energy for the high-frequency resonance shock wave generator 8, the energy accumulator 5 stores energy, the energy controller 7 controls the energy of the high-frequency resonance shock wave generator 8, the piezoelectric ceramic transducer 13 in the shock wave generating cavity 12 in the high-frequency resonance shock wave generator 8 converts electric energy into high-frequency mechanical vibration waves, the superconducting coil group 14 enhances the magnetic field intensity to improve the vibration energy transmission efficiency, the shock wave amplifier 16 in the resonance cavity 15 restrains and amplifies the shock wave energy, and then the shock wave is dispersed to the inside of the coalbed gas reservoir body 1 through the six groups of shock wave emission heads 9 at the bottom end of the high-frequency resonance shock wave generator 8, in the process, the natural fissures are activated by low-frequency sweep frequency, the energy transmission channel is established, the netted fissures are generated by matching the inherent frequency for continuous impact, the crack radius is expanded by superimposed harmonic, the crack width is stabilized by pulse type decreasing energy input, the energy transmission is enhanced by resonance of the shock wave frequency and the inherent frequency of the coal seam, the fissure expansion is promoted, when the shock wave propagates in the coal seam, stress waves are generated, microfissures are expanded and connected, the permeability is improved, the shock wave can also accelerate the desorption process of the coalbed gas, improve the gas flowability and recovery rate, the setting of the tungsten carbide alloy layer 20 improves the corrosion resistance and wear resistance of the shock wave emission head 9, prolongs the service life, then, the helium refrigerator 6 reduces the temperature of the helium by relaxing the helium from a high-pressure state to a low-pressure state through an expansion valve, so as to realize the refrigeration effect, the helium enters the flow guide channel 18 in the inner wall of the refrigeration sleeve body 17 through the refrigeration gas pipeline 10, since the cross section of the flow guide channel 18 is a semicircular structure, the flow guide channel 18 is spirally distributed on the inner surface of the refrigeration sleeve body 17, guides the helium to flow along the outer wall of the high-frequency resonance shock wave generator 8 from top to bottom, and drives the heat inside the high-frequency resonance shock wave generator 8, which plays a role in cooling the piezoelectric ceramic transducer 13 and the superconducting coil group 14, prolongs the service life, and the helium flowing to the bottom of the flow guide channel 18 is recovered to the inside of the helium refrigerator 6 through the refrigeration recovery pipeline 11, so as to facilitate the recovery of the helium.

[0036] Obviously, the above-described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

Claims

1. A coal bed methane reservoir resonant shock wave reconstruction device, comprising a coal bed methane reservoir body (1), a reconstruction well (3) is arranged in the inside of the coal bed methane reservoir body (1), and a device rack body (4) is mounted on the surface of the coal bed methane reservoir body (1) at the position of the reconstruction well (3), characterized in that, The device frame body (4) is provided with an uphole battery pack (2) on one side, a helium refrigeration machine (6) on the other side, an energy accumulator (5) at the bottom, and the energy accumulator (5) extends to the inside of the modified well (3) and is provided with an energy controller (7) at the bottom end, the energy controller (7) is provided with a high-frequency resonance shock wave generator (8) at the bottom end, and the high-frequency resonance shock wave generator (8) is provided with a shock wave emission head (9) at the bottom end, the high-frequency resonance shock wave generator (8) is provided with a shock wave generation cavity (12) in the inside, and the shock wave generation cavity (12) is provided with a piezoelectric ceramic transducer (13) in the inside, the piezoelectric ceramic transducer (13) is provided with a superconducting coil group (14) at the bottom end, and the high-frequency resonance shock wave generator (8) is provided with a refrigeration sleeve body (17) on the outer wall, and the refrigeration sleeve body (17) is provided with a flow guide channel (18) on the inner wall.

2. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 1, wherein: The shock wave emission head (9) is provided with six groups and is distributed at equal intervals, and the outer surface of the shock wave emission head (9) is provided with a tungsten carbide alloy layer (20).

3. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 1, wherein: The high-frequency resonance shock wave generator (8) is provided with a resonance cavity (15) at the bottom, and the resonance cavity (15) is provided with a shock wave amplifier (16) in the inside.

4. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 1, wherein: The refrigeration sleeve body (17) is in an annular columnar structure, and the inside of the refrigeration sleeve body (17) is in a hollow structure.

5. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 1, wherein: The refrigeration sleeve body (17) is provided with a refrigeration gas pipeline (10) on the outer wall at the top, and a refrigeration recovery pipeline (11) on the outer wall at the bottom, and the refrigeration gas pipeline (10) is connected to the bottom end of the refrigeration recovery pipeline (11).

6. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 5, wherein: The output end of the helium refrigeration machine (6) is connected to the top end of the refrigeration gas pipeline (10), and the input end of the helium refrigeration machine (6) is connected to the top end of the refrigeration recovery pipeline (11).

7. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 1, wherein: The cross section of the flow guide channel (18) is in a semicircular structure, and the flow guide channel (18) is spirally distributed on the inner surface of the refrigeration sleeve body (17).

8. A coal bed gas reservoir resonant shockwave modification apparatus as defined in claim 1, wherein: The refrigeration sleeve body (17) is provided with a temperature sensor (19) on one side at the top end, and the detection end of the temperature sensor (19) extends to the inside of the refrigeration sleeve body (17).

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