Long-distance partition step-by-step fracturing coal seam anti-reflection method and system

Abstract

The invention discloses a long-distance subarea step-by-step fracturing coal seam permeability increasing method and system, and the method comprises the steps: dividing a target coal seam into different subareas, setting a plurality of perforation point locations according to fracturing requirements, and obtaining fracturing construction parameters of the subareas of the target coal seam; according to the fracturing construction parameters, directional perforation fracturing is conducted on the target coal seam through a kilometer directional drilling machine provided with a laser device; the deepest perforation of the target coal seam is sealed through a hole packer, a conductive ion solution is injected into the hole, and secondary single-hole local fracturing is conducted through the liquid-electric effect; and respectively connecting the positive electrode and the negative electrode to the walls of two adjacent perforation holes, and performing three-stage two-hole block fracturing by utilizing an electric crushing effect until the coal seam in the partition is completely fractured. According to the method, three-stage step-by-step fracturing permeability increasing of the target coal seam can be achieved, consumption of water resources and energy loss of high-voltage cables are reduced to a great extent, and the energy utilization rate is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of coal seam permeability enhancement, and in particular relates to a method and system for increasing the permeability of coal seams by long-distance zoned and step-by-step fracturing. Background Art

[0002] Coalbed methane (gas) is a gas produced during the coal mining process. It has the characteristics of "three highs and one low", namely high content, high ground stress, high gas pressure and low permeability. The low permeability of coal seams makes it difficult to effectively extract gas. Therefore, before pre-extraction of gas, most domestic coal mines take permeability-enhancing measures to promote the production of coalbed methane. Hydraulic fracturing technology, as an effective means to improve the permeability of coal seams, is divided into two implementation methods: ground and underground. Ground hydraulic fracturing requires huge equipment and complex water supply, power supply and transportation conditions, and has a high investment cost. Although underground hydraulic fracturing has high flexibility and construction accuracy and low cost, it is limited by underground space. Once a coal and gas outburst accident occurs, it may cause serious casualties and safety risks.

[0003] The development of coal seam permeability enhancement technology is of great significance for improving coalbed methane recovery rate and ensuring the stability and sustainability of energy supply. It is crucial to the safe production of coal mines by reducing the internal pressure and stress of coal seams and reducing the risk of mine accidents.

[0004] However, the existing hydraulic fracturing technology has many shortcomings. First, traditional hydraulic fracturing technology consumes a lot of water resources, especially in arid areas such as the west. Second, it requires a lot of equipment and manpower, resulting in high costs. In addition, it may pollute groundwater resources and have an adverse impact on the environment. The irregularity and complexity of coal seams make it difficult for traditional methods to quickly achieve the ideal permeability enhancement effect, and complex permeability enhancement methods may cause significant disturbances to coal rocks, increase the risk of disasters such as coal and gas outbursts, and affect the permeability enhancement effect of coal seams. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a method and system for increasing the permeability of coal seams by long-distance zoned and step-by-step fracturing to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present invention provides a method for increasing the permeability of coal seams by long-distance zoned and step-by-step fracturing, comprising:

[0007] The target coal seam is divided into several zones, and each zone is fractured respectively. Several predetermined perforation points are set as required to obtain the fracturing construction parameters of the target coal seam zones;

[0008] According to the fracturing construction parameters, the target coal seam is subjected to directional perforation fracturing using a kilometer-long directional drilling rig equipped with a laser;

[0009] The deepest perforation of the target coal seam is sealed by a sealer, and a conductive ion solution is injected into the hole to perform secondary single-hole local fracturing by utilizing the electrohydraulic effect;

[0010] Connect the positive and negative electrodes to the walls of two adjacent perforations respectively, and use the electrical fragmentation effect to perform three-stage two-hole block fracturing until all the coal seams in the subarea are fully fractured;

[0011] Repeat the above three-stage fracturing operation until all zones of the target coal seam are fracturing and permeability enhancement is completed.

[0012] Preferably, obtaining the fracturing construction parameters of the target coal seam partition includes:

[0013] Collect target coal seam samples and conduct indoor tests on the target coal seam samples to obtain basic parameters of the target coal seam samples; wherein the basic parameters include coal body strength, hardness, water content, permeability and metamorphism;

[0014] The fracturing construction parameters are optimized through the basic parameters; wherein the fracturing construction parameters include perforation depth, perforation spacing, laser intensity, laser power, discharge voltage and discharge frequency.

[0015] Preferably, the directional perforation fracturing of the target coal seam using a kilometer-long directional drilling rig equipped with a laser comprises:

[0016] Divide the target coal seam into fracturing zones, perform fracturing on each zone respectively, and set a number of predetermined perforation points as required;

[0017] Install positive and negative electrodes, a laser head and a water injection pipe in the drill bit of the kilometer-long directional drilling rig, and connect the positive and negative electrodes to the positive and negative poles of the electric pulse generator outside the equipment through cables, and fix the positions of the positive and negative electrodes and the laser head with a positioning baffle, and connect the water injection pipe to the water injection pump;

[0018] Select a coal seam partition, push the drill rod of the kilometer-long directional drill inward until the laser head is aligned with the first pre-set directional perforating point, turn on the laser transmitter for laser directional perforating, and complete all perforations.

[0019] Preferably, the secondary single-hole local fracturing using the hydro-electric effect includes:

[0020] The deepest perforations in the coal seam are sealed by a sealer, and a conductive ion solution is injected into the holes by a high-pressure water injection pump and a water injection pipe, maintaining a set water pressure value to achieve the water solution permeating the coal body;

[0021] The positive and negative electrodes are respectively connected to the conductive ion solution, the electric pulse generator is turned on for charging, and the electric pulse generator is turned off after the cyclic discharge is performed for a first set number of times to achieve single-hole local fracturing.

[0022] Preferably, the three-stage two-hole block fracturing using the electric fragmentation effect includes:

[0023] Push the drill rod of the kilometer-long directional drill inward again, connect the positive and negative electrodes to the walls of two adjacent perforations, and turn on the electric pulse generator for charging;

[0024] After the second set number of cyclic discharges, the electric pulse generator is turned off;

[0025] As the kilometer-long drilling rod is pushed inward, large-scale fracturing continues in all coal seam blocks between adjacent perforations in the subarea.

[0026] In a second aspect, the present invention provides a long-distance zoned step-by-step fracturing coal seam permeability enhancement system, comprising:

[0027] The parameter acquisition module is used to divide the target coal seam into several areas, and perform fracturing on each area respectively, set several predetermined perforation points as needed, and obtain the fracturing construction parameters of the target coal seam partitions;

[0028] A primary fracturing module, used to perform directional perforation fracturing on the target coal seam using a kilometer-long directional drilling rig equipped with a laser according to the fracturing construction parameters;

[0029] A secondary fracturing module is used to seal the deepest perforation of the target coal seam through a sealer, and inject a conductive ion solution into the hole to perform secondary single-hole local fracturing by utilizing the liquid-electric effect;

[0030] The three-stage fracturing module is used to connect the positive and negative electrodes to the walls of two adjacent perforations respectively, and use the electrical fragmentation effect to perform three-stage two-hole block fracturing until all coal seams in the area are completely fractured.

[0031] In a third aspect, the present invention further discloses a computer device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the first aspect.

[0032] In a fourth aspect, the present invention further discloses a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method described in the first aspect when executed by a processor.

[0033] In a fifth aspect, the present invention further discloses a computer program product, including a computer program, which implements the steps of the method described in the first aspect when executed by a processor.

[0034] Compared with the prior art, the present invention has the following advantages and technical effects:

[0035] The present invention provides a method for increasing the permeability of coal seams by fracturing step by step over long distance zones. First, the target coal seam is divided into zones, and each zone is fractured respectively. A number of predetermined perforation points are set as required to obtain the fracturing construction parameters of the target coal seam zones. Secondly, according to the fracturing construction parameters, the target coal seam is subjected to directional perforation fracturing by using a kilometer-long directional drilling rig equipped with a laser. Then, the deepest perforations of the target coal seam are sealed by a sealer, and a conductive ion solution is injected into the holes to perform secondary single-hole local fracturing by using the liquid-electric effect. Finally, the positive and negative electrodes are respectively connected to the walls of two adjacent perforations, and the electric fragmentation effect is used to perform tertiary two-hole block fracturing.

[0036] The present invention combines the characteristics of the drill bit itself with the advantages of laser and electric pulses to achieve three-stage progressive fracturing and permeability enhancement of the target coal seam during the fracturing process; the chemical energy of electrical energy and electric pulses is converted into green energy such as mechanical energy, which greatly reduces the consumption of water resources and the energy loss of high-voltage cables, improves energy utilization, saves a lot of water resource consumption compared to traditional hydraulic fracturing, saves a lot of workload for subsequent coal seam permeability enhancement, and improves the overall gas extraction and coal mining efficiency.

[0037] The present invention works closely with advanced kilometer-long directional drilling rigs to efficiently achieve precise fracturing and deep permeability enhancement of coal seams with complex distribution and irregular shapes over long distances and wide ranges. This combination not only significantly improves operating efficiency, but also greatly enhances the permeability of coal seams, creating more favorable conditions for subsequent coal mining operations. The present invention uses laser rock breaking to perform pre-set directional perforations on coal seams based on actual parameter changes and coal rock properties, avoiding damage to other parts of the coal seam during the permeability enhancement process, thereby improving the fracturing efficiency of the coal seam and reducing the possibility of coal seam collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0039] Figure 1 is a flow chart of a method according to an embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of on-site construction of an embodiment of the present invention;

[0041] Figure 3 A coal seam permeability enhancement device according to an embodiment of the present invention;

[0042] Among them, 1. target coal seam; 2. directional perforation point; 3. high-voltage wire; 4. laser head; 5. negative needle electrode; 6. drill bit; 7. positioning baffle; 8. shell; 9. optical fiber cable; 10. hole sealer; 11. kilometer-long directional drilling rig; 12. drill rod; 13. laser transmitter; 14. high-pressure water injection pump; 15. positive needle electrode; 16. water injection switch; 17. drilling; 18. electric pulse generator; 19. pressure valve; 20. water injection pipe. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0045] like Figure 1 As shown, this embodiment provides a method for increasing the permeability of coal seams by long-distance zoned and step-by-step fracturing, comprising:

[0046] S1. Obtaining the fracturing construction parameters of the target coal seam partition;

[0047] Specifically, target coal seam samples were collected on site, and basic parameters of coal samples were tested indoors, such as coal strength, hardness, water content, permeability and metamorphism, etc. Similar simulation experiments were also carried out indoors to analyze the effect of laser and electric pulse permeability enhancement and optimize on-site fracturing parameters, such as perforation depth, perforation spacing, laser intensity, laser power, discharge voltage and discharge frequency, etc.

[0048] Among them, indoor simulation experiments were carried out to analyze the permeability enhancement effect and optimize the on-site fracturing parameters. Laser beams with powers of 2kw, 3kw, 4kw, and 5kw were selected to break the coal and rock samples respectively, and the degree of cracks in the coal and rock was observed to determine the power of the laser beam that had the best coal breaking effect.

[0049] This embodiment innovatively divides the coal seam into several areas every 50 meters, and performs fracturing on each area separately, and sets several predetermined perforation points as needed.

[0050] Before the coal seam is subjected to hydraulic fracturing and permeability enhancement, the present embodiment adopts a preliminary indoor experiment method, and the optimal power of the high-energy laser beam for breaking the coal obtained in the experiment is 4 kW, thereby optimizing the actual operation method.

[0051] S2. According to the fracturing construction parameters, this embodiment innovatively uses a kilometer-long directional drilling rig equipped with a laser to perform directional drilling and fracturing on the target coal seam;

[0052] like Figure 2-3 As shown, this step specifically includes:

[0053] S201, use the kilometer directional drilling rig to carry out directional drilling of the target coal seam 1, after the drilling is completed, the drill rod is withdrawn, and a high-voltage electric pulse generator 18, a high-pressure water injection pump 14, a laser transmitter 13, and a drill rod 12 are installed on the kilometer directional drilling rig, and a positive needle electrode 15 and a negative needle electrode 5, a laser head 4, and a water injection pipe 20 are installed in the drill bit 6, and the positive and negative electrodes are connected to the positive and negative electrodes of the electric pulse generator outside the equipment through cables, and the positions of the positive and negative electrodes and the laser head are fixed with a positioning baffle 7 ， The water injection pipe 20 is connected to the high-pressure water injection pump 14 .

[0054] The housing head and drill bit of the kilometer-long directional drilling rig can be detachably installed, which is convenient for subsequent experimental improvements. The drill rod short-circuit at the rear of the housing can be connected to the drill rod, and the length of the device can be extended by selecting drill rods of different lengths. This embodiment innovatively combines the three-level permeability enhancement technology with the kilometer-long directional drilling rig to achieve long-distance fracturing permeability enhancement.

[0055] S202, push the kilometer-long drilling rod inward until the laser head 4 is aligned with the first pre-set directional perforation point, turn on the laser transmitter 13 and keep it on for 10-20 minutes until the perforation is successful;

[0056] S203, pushing the drill rod inwards in sequence and performing laser directional perforation until all perforations are completed.

[0057] This embodiment uses laser rock breaking, and can perform pre-set directional perforation on the coal seam according to the actual parameter changes and coal rock properties, avoiding damage to other parts of the coal seam during the permeability enhancement process, thereby improving the fracturing efficiency of the coal seam and reducing the probability of coal seam collapse. This embodiment innovatively uses a combination of laser and electric pulse technology to achieve three-level progressive permeability enhancement of the coal seam.

[0058] S3, sealing the deepest perforation of the target coal seam by a sealer, and injecting a conductive ion solution into the hole. This embodiment innovatively utilizes the electrohydraulic effect to perform secondary single-hole local fracturing;

[0059] During fracturing, a sealer is provided to seal the borehole before injecting the aqueous solution, thereby blocking the solution and improving the permeability enhancement effect of the hydro-electric effect.

[0060] As an additional specific implementation method, the step specifically includes:

[0061] S301, seal the deepest perforation of the coal seam by using the sealing device 10, inject a certain amount of conductive ion solution into the hole by using the high-pressure water injection pump 14 and the water injection pipe 20, maintain the water pressure for 1-2 hours to make the water solution penetrate the coal body, and at the same time connect the negative needle electrode 5 and the positive needle electrode 15 to the conductive ion solution, turn on the electric pulse generator 18 for charging, and after 5-10 cycles of discharge, turn off the electric pulse generator 18;

[0062] S302, withdraw the drill pipe of the kilometer-long directional drilling rig in sequence, and repeat the above operations to seal all perforations and perform local fracturing.

[0063] Among them, the discharge frequency of the high-voltage electric pulse generator 18 is set to 50Hz and the voltage range is 160kV.

[0064] S4, connecting the positive and negative electrodes to the walls of two adjacent perforations respectively. This embodiment innovatively utilizes the electric fragmentation effect to perform three-stage two-hole block fracturing;

[0065] As an additional specific implementation method, the step specifically includes:

[0066] S401, push the kilometer-long drilling rod inward again, connect the negative needle electrode 5 and the positive needle electrode 15 to the walls of two adjacent perforations respectively, turn on the electric pulse generator 18 for charging, and after 20-30 cycles of discharge, turn off the electric pulse generator 18;

[0067] S402, as the kilometer-long drilling rod is pushed inward, the above operation is repeated to perform large-scale fracturing on the coal seam blocks between all adjacent perforations.

[0068] This embodiment also discloses: a certain amount of conductive ion solution is injected into the three boreholes by a high-pressure water injection pump 14. After the ion solution fully permeates the coal body, two adjacent perforation holes are selected and the negative needle electrode 5 and the positive needle electrode 15 are respectively placed therein. The electric pulse generator 18 is turned on for charging. When the voltage reaches the set value, discharge is performed through the negative needle electrode 5 and the positive needle electrode 15. The discharge is stopped after cracks appear in the coal seam between the two adjacent holes, and the electric pulse generator is turned off.

[0069] S5. Through acoustic emission and microseismic sensors, the fracturing signals are collected in real time and the fracturing area is located. The changes in gas pressure and content before and after fracturing are compared to obtain the fracturing effect evaluation results.

[0070] This step specifically includes:

[0071] S501, installing acoustic emission and microseismic sensors in different areas of the coal seam to collect fracturing signals in real time and locate fracturing areas;

[0072] S502, simultaneously, extracting gas from the coal seam before and after fracturing, and comparing changes in gas pressure and content before and after extraction;

[0073] S503. Comprehensive comparative analysis of the fracturing permeability enhancement effect.

[0074] Beneficial effects of this embodiment:

[0075] The present invention combines the characteristics of the drill bit itself with the advantages of laser and electric pulses to achieve three-stage progressive fracturing and permeability enhancement of the target coal seam during the fracturing process; first, a laser head is used to emit a laser beam to perform a small-scale fracturing of the target coal seam, and then the liquid-electric effect is used to discharge the electrodes to perform a secondary fracturing of the boreholes. On the basis of two consecutive fracturings, positive and negative electrodes are used in adjacent boreholes to electrically break the coal seams between adjacent boreholes until all coal seams are zoned and fractured.

[0076] The use of electrical energy and chemical energy of electric pulses to convert into green energy such as mechanical energy greatly reduces the consumption of water resources and the energy loss of high-voltage cables, improves energy utilization, saves a lot of water resource consumption compared to traditional hydraulic fracturing, saves a lot of workload for subsequent coal seam permeability enhancement, and improves the overall gas extraction and coal mining efficiency.

[0077] This embodiment works closely with advanced kilometer-long directional drilling rigs to efficiently achieve precise fracturing and deep permeability enhancement of coal seams with complex distribution and irregular shapes over long distances and wide ranges. This combination not only significantly improves operating efficiency, but also greatly enhances the permeability of coal seams, creating more favorable conditions for subsequent coal mining operations. This embodiment uses laser rock breaking to perform pre-set directional perforations on coal seams based on actual parameter changes and coal rock properties, avoiding damage to other parts of the coal seam during the permeability enhancement process, thereby improving the fracturing efficiency of the coal seam and reducing the possibility of coal seam collapse.

[0078] This embodiment has formulated a complete process of long-distance zoned step-by-step fracturing to increase the permeability of coal seams. At the same time, this method can achieve long-distance coal seam permeability increase. The drill tail and the retractable drill rod are detachably connected, which can change the range and distance of coal seam fracturing and permeability increase, solve the problem of coal seam permeability increase caused by distance limitation, and divide the zones into separate zones for fracturing and permeability increase, basically achieving a significant improvement in the regional coal seam permeability increase effect, effectively improving the utilization rate of the coal body and the gas extraction efficiency.

[0079] Embodiment 2

[0080] Based on the same inventive concept, this embodiment provides a long-distance zoned step-by-step fracturing coal seam permeability enhancement system, comprising:

[0081] The parameter acquisition module is used to divide the target coal seam into several areas, and perform fracturing on each area respectively, set several predetermined perforation points as needed, and obtain the fracturing construction parameters of the target coal seam partitions;

[0082] A primary fracturing module, used to perform directional drilling and fracturing on the target coal seam using a kilometer-long directional drilling rig equipped with a laser according to the fracturing construction parameters;

[0083] A secondary fracturing module is used to seal the deepest perforation of the target coal seam through a sealer, and inject a conductive ion solution into the hole to perform secondary single-hole local fracturing by utilizing the liquid-electric effect;

[0084] The three-stage fracturing module is used to connect the positive and negative electrodes to the walls of two adjacent perforations, and use the electrical fragmentation effect to perform three-stage two-hole block fracturing until all coal seams in the area are fully fractured;

[0085] The fracturing evaluation module is used to collect fracturing signals in real time and locate the fracturing area through acoustic emission and microseismic sensors, compare the changes in gas pressure and content before and after fracturing, and obtain the fracturing effect evaluation results.

[0086] The long-distance zoned step-by-step fracturing coal seam permeability enhancement system provided in this embodiment has all the advantages of the long-distance zoned step-by-step fracturing coal seam permeability enhancement method provided in the first embodiment.

[0087] Embodiment 3

[0088] This embodiment further discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the first embodiment.

[0089] Embodiment 4

[0090] This embodiment further discloses a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first embodiment are implemented.

[0091] Embodiment 5

[0092] This embodiment also discloses a computer program product, including a computer program, which implements the steps of the method described in the first embodiment when executed by a processor.

[0093] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for increasing the permeability of coal seams by long-distance zoned and step-by-step fracturing, characterized in that: The following steps are involved: Divide the target coal seam into several zones, perform fracturing on each zone respectively, set several predetermined perforation points as needed, and obtain fracturing construction parameters for the target coal seam zones; According to the fracturing construction parameters, a kilometer-long directional drilling rig equipped with a laser is used to perform directional perforation fracturing on the target coal seam partitions; The deepest perforation of the target coal seam is sealed by a sealer, and a conductive ion solution is injected into the hole to perform secondary single-hole local fracturing by utilizing the electrohydraulic effect; Connect the positive and negative electrodes to the walls of two adjacent perforations respectively, and use the electrical fragmentation effect to perform three-stage two-hole block fracturing until all the coal seams in the subarea are fully fractured; Repeat the above three-stage fracturing operation until all zones of the target coal seam are fracturing and permeability enhancement is completed.

2. The method according to claim 1, characterized in that The fracturing operation parameters for obtaining the target coal seam partition include: Collect target coal seam samples and conduct indoor tests on the target coal seam samples to obtain basic parameters of the target coal seam samples; wherein the basic parameters include coal body strength, hardness, water content, permeability and metamorphism; The fracturing construction parameters are optimized through the basic parameters; wherein the fracturing construction parameters include perforation depth, perforation spacing, laser intensity, laser power, discharge voltage and discharge frequency.

3. The method according to claim 1, characterized in that The method of using a kilometer-long directional drilling rig equipped with a laser to perform directional perforation fracturing on the target coal seam includes: Divide the target coal seam into fracturing zones, perform fracturing on each zone respectively, and set a number of predetermined perforation points as required; Install positive and negative electrodes, a laser head and a water injection pipe in the drill bit of the kilometer-long directional drilling rig, and connect the positive and negative electrodes to the positive and negative poles of the electric pulse generator outside the equipment through cables, and fix the positions of the positive and negative electrodes and the laser head with a positioning baffle, and connect the water injection pipe to the water injection pump; Select a coal seam partition and push the drill rod of the kilometer-long directional drill inward until the laser head is aligned with the first pre-set directional perforating point, turn on the laser transmitter for laser directional perforating, and complete all perforations.

4. The method according to claim 1, characterized in that: Secondary single-hole local fracturing using the hydro-electric effect includes: The deepest perforations in the coal seam are sealed by a sealer, and a conductive ion solution is injected into the holes by a high-pressure water injection pump and a water injection pipe, maintaining a set water pressure value to achieve the water solution permeating the coal body; The positive and negative electrodes are respectively connected to the conductive ion solution, the electric pulse generator is turned on for charging, and the electric pulse generator is turned off after the cyclic discharge is performed for a first set number of times to achieve single-hole local fracturing.

5. The method according to claim 1, characterized in that The three-stage two-hole block fracturing using the electrical fragmentation effect includes: Push the drill rod of the kilometer-long directional drill inward again, connect the positive and negative electrodes to the walls of two adjacent perforations, and turn on the electric pulse generator for charging; After the second set number of cyclic discharges, the electric pulse generator is turned off; As the kilometer-long drilling rod is pushed inward, large-scale fracturing continues in all coal seam blocks between adjacent perforations in the subarea.

6. A long-distance zoned step-by-step fracturing coal seam permeability enhancement system, characterized in that: include: The parameter acquisition module is used to divide the target coal seam into several areas, and perform fracturing on each area respectively, set several predetermined perforation points as needed, and obtain the fracturing construction parameters of the target coal seam partitions; A primary fracturing module, used to perform directional perforation fracturing on the target coal seam using a kilometer-long directional drilling rig equipped with a laser according to the fracturing construction parameters; A secondary fracturing module is used to seal the deepest perforation of the target coal seam through a sealer, and inject a conductive ion solution into the hole to perform secondary single-hole local fracturing by utilizing the liquid-electric effect; The three-stage fracturing module is used to connect the positive and negative electrodes to the walls of two adjacent perforations respectively, and use the electrical fragmentation effect to perform three-stage two-hole block fracturing until all coal seams in the area are completely fractured.

7. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claims 1 to 5 are implemented.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to claims 1 to 5 are implemented.

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