Perforating gun suitable for perforation and high-energy gas fracturing combined construction technology

Abstract

The invention discloses a perforating gun suitable for perforation and high-energy gas fracturing combined construction technology, and relates to the field of perforating guns for underwater oil extraction, the perforating gun comprises a perforating gun body, and an inner cavity of the perforating gun body is sequentially provided with a honeycomb-shaped fast combustion chamber, a porous ceramic partition plate and a slow combustion chamber from left to right; a control module is installed in the center of an inner cavity of the perforating gun body, spiral flow guide grooves are formed in the outer walls of the honeycomb-shaped fast combustion chamber, the porous ceramic partition plate and the slow combustion chamber, and gradient pressure relief holes are formed in the inner wall of the perforating gun body. According to the perforating gun suitable for the perforation and high-energy gas fracturing combined construction technology, through the arrangement of the honeycomb-shaped fast combustion chamber, the porous ceramic partition plate and the slow combustion chamber, three-stage energy release from shock waves to gas expansion to continuous loading can be achieved, the crack extension length during perforation can be effectively increased, and the perforation efficiency is improved. And through the spiral flow guide grooves and the gradient pressure relief holes, the tangential scouring force of combustion gas can be enhanced.

Description

Technical Field

[0001] The invention relates to the field of perforating guns for underwater oil production, and in particular to a perforating gun suitable for a perforating and high-energy gas fracturing combined construction process. Background Art

[0002] A perforating gun is a tool used in oil field completion or cementing. It is a combination of equipment and accessories used for perforating oil and gas wells. Currently, the most widely used is the shaped energy perforating gun, which uses the shaped energy phenomenon of explosion to generate a shaped energy jet to perforate the formation. The model of the perforating gun is represented by the outer diameter of the perforating gun. The selection of the perforating gun needs to match the production casing and wall thickness, otherwise it is easy to cause the gun to stick.

[0003] When performing construction work, traditional perforating guns have many steps and need to be carried out separately. The perforating and fracturing need to be completed in a distributed manner, resulting in multiple trips to the well for a single trip, which leads to a long construction time. At the same time, the expansion of cracks during perforation is uncontrollable, and the extension direction is random and easy to deviate, resulting in the recovery rate of the oil well being unable to be guaranteed. In addition, traditional perforating guns face problems such as salt spray corrosion and high-pressure seal failure when operating in offshore oil and gas wells. At the same time, the cost of a single trip to the well on an offshore platform is high.

[0004] Therefore, it is necessary to propose a perforating gun suitable for the combined construction process of perforation and high-energy gas fracturing to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a perforating gun suitable for a perforation and high-energy gas fracturing combined operation process, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A perforating gun suitable for a combined perforation and high-energy gas fracturing operation process, comprising a perforating gun body, wherein the inner cavity of the perforating gun body is sequentially installed with a honeycomb-shaped fast-burning chamber, a porous ceramic partition, and a slow-burning chamber from left to right; a control module is installed in the center of the inner cavity of the perforating gun body; and perforating charges are installed in the inner cavities of the honeycomb-shaped fast-burning chamber, the porous ceramic partition, and the slow-burning chamber. The outer walls of the honeycomb fast combustion chamber, porous ceramic partition and slow combustion chamber are all provided with spiral guide grooves, the inner wall of the perforating gun body is provided with gradient pressure relief holes, and a high-energy gas chamber is installed on the right side of the inner cavity of the perforating gun body.

[0007] Preferably, the inner cavity of the honeycomb fast combustion chamber is filled with nitroguanidine propellant, the inner cavity of the slow combustion chamber is filled with modified double-base propellant, the interior of the high-energy gas chamber is filled with high-energy gas, and the porous ceramic partition is used to homogenize the pressure fluctuations generated during combustion in the honeycomb fast combustion chamber. The honeycomb fast combustion chamber, the porous ceramic partition and the slow combustion chamber are connected by flanges. The honeycomb fast combustion chamber, the porous ceramic partition and the slow combustion chamber are connected by a tapered throat with a throat diameter ratio of 1:3:5. The porosity of the porous ceramic partition is 40%, the peak pressure of the honeycomb fast combustion chamber during operation is 300 MPa, and the pressure of the porous ceramic partition during operation is 80-120 MPa.

[0008] Preferably, the perforating bullets are arranged in a spiral manner at the honeycomb fast combustion chamber, the porous ceramic partition, and the slow combustion chamber. Blind holes are opened on the outer wall of the perforating gun body. The number of the blind holes is consistent with that of the perforating bullets, and the positions of the blind holes correspond to the perforating bullets. The side of the high-energy gas chamber close to the slow combustion chamber is polylactic acid PLA, which is used to degrade it after the slow combustion chamber is ignited, thereby releasing the high-energy gas in the inner cavity of the high-energy gas chamber. The inner cavities of the honeycomb fast combustion chamber, the porous ceramic partition and the slow combustion chamber are connected.

[0009] Preferably, the honeycomb fast combustion chamber, the porous ceramic partition and the slow combustion chamber are provided with mounting grooves, the perforating bullets are mounted in the mounting grooves, the mounting grooves are spiral guide grooves, and the mounting grooves are used to guide the perforating bullets to perform axial displacement.

[0010] Preferably, a detonating cord is installed at the perforating bullet, and the detonating cord runs through the central holes of all the perforating bullets. The perforating bullet is connected in series with the control module through the detonating cord. The perforating bullet is connected with a mechanical detonator and an electric detonator, and the electric detonator is electrically connected to the control module. The mechanical detonator and the electric detonator are installed on the left and right sides of the perforating gun body through waterproof sealing rings.

[0011] Preferably, the gradient pressure relief hole is opened on the inner wall of the perforating gun body, the right side of the gradient pressure relief hole extends to the outside of the perforating gun body, a sealing plug is installed on the right side of the gradient pressure relief hole, and a conical contraction throat is opened on the left side of the gradient pressure relief hole and the right side of the spiral guide groove.

[0012] Preferably, the aperture of the gradient pressure relief hole from left to right is 3mm-5mm-7mm, the hardness of the silicon carbide bushing is 2800HV, and it is arranged in the inner cavity of the gradient pressure relief hole at an inclined angle of 45°. The gradient pressure relief hole and the silicon carbide bushing are used to utilize gas vortex to peel off the gunpowder slag remaining in the inner cavity of the gradient pressure relief hole. The side of the tapered contraction throat close to the spiral guide groove is the inlet, and the side of the tapered contraction throat close to the gradient pressure relief hole is the outlet, wherein the inlet is Φ8mm and the outlet is Φ5mm. The outlet of the tapered contraction throat is connected to the 3mm section of the gradient pressure relief hole, and a silicon carbide bushing is installed in the inner wall of the gradient pressure relief hole.

[0013] Preferably, the control module includes a first temperature sensor, an electrical interface and a mechanical interface, the first temperature sensor is used to monitor the temperature of the control module, and the electrical interface and the mechanical interface are used to connect the electronically controlled initiator and the mechanical initiator.

[0014] Preferably, a pressure relief pipe is opened on the right side inside the perforating gun body, the right side of the pressure relief pipe extends to the outside of the perforating gun body, a memory alloy pressure relief valve is installed on the right side of the pressure relief pipe, a quick-release flange is installed on the right side of the perforating gun body, a second temperature sensor is installed in the inner cavity of the perforating gun body, the second temperature sensor is installed in the honeycomb fast combustion chamber, the slow combustion chamber, the pressure relief pipe, and the high-energy gas chamber, the second temperature sensor installed in the honeycomb fast combustion chamber and the slow combustion chamber is used to monitor the temperature of the gunpowder combustion in real time, and the second temperature sensor installed in the pressure relief pipe is used to monitor the sudden drop in the ejection temperature during gunpowder combustion.

[0015] Preferably, spiral cooling fins are installed on the outer wall of the perforating gun body, and a first pressure sensor is installed on the outer wall of the perforating gun body. The first pressure sensor is an eight-channel pressure sensor, wherein the two-channel first pressure sensors are used to monitor the pressure of the honeycomb fast combustion chamber, the porous ceramic partition and the slow combustion chamber, the three-channel first pressure sensor is used to monitor the annular pressure of the perforating gun body, and the three-channel first pressure sensor is used to monitor the pressure of the pressure relief pipe.

[0016] Compared with the prior art, the present invention provides a perforating gun suitable for the combined perforation and high-energy gas fracturing process, which has the following beneficial effects: The perforating gun is suitable for the perforation and high-energy gas fracturing combined construction process, and comprises a honeycomb fast combustion chamber, a porous ceramic partition and a slow combustion chamber connected by a tapered throat. The honeycomb fast combustion chamber can quickly generate an initial shock wave for flushing the perforated holes, the porous ceramic partition can equalize the pressure fluctuation, and the slow combustion chamber can continuously release high-pressure gas and extend the cracks in the holes. Based on this, a three-stage energy release from shock wave to gas expansion to continuous loading can be achieved, which can effectively increase the length of the crack extension. When the honeycomb fast combustion chamber is working, it is characterized by high pressure for a short time, and when the slow combustion chamber is working, it is characterized by low pressure for a long time. Based on this, pressure complementarity can be formed, which can increase the complexity of the cracks. When the perforating gun body is perforated through the spiral heat dissipation fins, the heat extraction speed of the honeycomb fast combustion chamber, the porous ceramic partition and the slow combustion chamber can be increased.

[0017] This perforating gun, suitable for the combined construction process of perforating and high-energy gas fracturing, can form clustered armor-piercing units by arranging perforating charges in a spiral arrangement. During construction, it can effectively break through the ground stress control, so that the extension direction of the crack can be increased by 2-3. It also has a good capacity utilization optimization effect and can form a perforation network, making the subsequent gas fracturing energy distribution more uniform.

[0018] This perforating gun, which is suitable for the combined construction process of perforating and high-energy gas fracturing, can enhance the tangential flushing force of the combustion gas by means of the spiral guide groove and gradient pressure relief hole. At the same time, the silicon carbide bushing arranged in the gradient pressure relief hole can enhance the structural strength of the gradient pressure relief hole while assisting it in using gas to strip off the residual gunpowder slag. The aperture of the gradient pressure relief hole is 3mm-5mm-7mm. When the gas flows, the aperture of 5mm can produce a throttling effect, which can increase the initial flushing pressure during perforation. The aperture of 3mm can balance the pressure fluctuation and prevent the water hammer effect. The aperture of 7mm can reduce the flow rate and prolong the action time of the gas. Based on this, the gradient pressure relief hole can be used to achieve pressure relief and multi-directional extension of cracks.

[0019] The perforating gun, which is suitable for the combined perforating and high-energy gas fracturing construction process, can monitor the overall pressure of the perforating gun body when it is working through the provided first pressure sensor. The provided mechanical detonator and the electronically controlled detonator can be selected according to actual conditions, thereby ensuring that the perforating gun body can be detonated normally.

[0020] This perforating gun, suitable for the combined perforation and high-energy gas fracturing construction process, can be directly integrated into a jack-up well workover platform to achieve synchronous perforation and fracturing operations during the platform's lifting and lowering process. It is also compatible with the installation environment of underwater oil tree blowout preventer groups, meeting the needs of deep-sea operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic structural diagram of the present invention as a whole; Figure 2 This invention Figure 1 Enlarged view of point A in the middle; Figure 3 Schematic diagram of the structure inside the porous ceramic separator of the present invention; Figure 4 This invention Figure 1 Enlarged view of point B in the middle.

[0022] In the figure: 1. Perforating gun body; 2. Spiral cooling fins; 3. Honeycomb fast-burning chamber; 4. Porous ceramic partition; 5. Slow-burning chamber; 6. High-energy gas chamber; 7. Perforating bullet; 8. Detonating cord; 9. Waterproof sealing ring; 10. Mounting slot; 11. Control module; 12. Electrical interface; 13. Mechanical interface; 14. First temperature sensor; 15. Quick-release flange; 16. Mechanical detonator; 17. Electric detonator; 18. Memory alloy pressure relief valve; 19. Pressure relief pipe; 20. First pressure sensor; 21. Second temperature sensor; 22. Spiral guide groove; 23. Conical contraction throat; 24. Gradient pressure relief hole; 25. Silicon carbide bushing; 26. Sealing plug; 28. Blind hole. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] Example 1: like Figures 1-4As shown, a perforating gun suitable for a combined perforation and high-energy gas fracturing construction process includes a perforating gun body 1. The inner cavity of the perforating gun body 1 is sequentially installed with a honeycomb fast combustion chamber 3, a porous ceramic partition 4, and a slow combustion chamber 5 from left to right. A control module 11 is installed in the center of the inner cavity of the perforating gun body 1. Perforating charges 7 are installed in the inner cavities of the honeycomb fast combustion chamber 3, the porous ceramic partition 4, and the slow combustion chamber 5. The inner cavity of the honeycomb fast combustion chamber 3 is filled with a nitroguanidine-based propellant, and the inner cavity of the slow combustion chamber 5 is filled with a modified double-base propellant. The high-energy gas chamber is filled with high-energy gas. The porous ceramic partition 4 is used to homogenize the pressure fluctuations generated during the combustion of the honeycomb fast combustion chamber 3. The honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5 are connected by flanges. The honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5 are connected by a tapered throat with a throat diameter ratio of 1:3:5. The porosity of the porous ceramic partition 4 is 40%. The peak pressure of the honeycomb fast combustion chamber 3 during operation is 300 MPa, and the pressure of the porous ceramic partition 4 during operation is 80-120M Pa, the perforating bullet 7 is arranged in a spiral manner in the honeycomb fast combustion chamber 3, the porous ceramic partition 4, and the slow combustion chamber 5. The honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5 are provided with a mounting groove 10. The perforating bullet 7 is installed in the mounting groove 10. The mounting groove 10 is a spiral guide groove. The mounting groove 10 is used to guide the perforating bullet 7 to perform axial displacement. A detonating cord 8 is installed at the perforating bullet 7. The detonating cord 8 passes through the center hole of all the perforating bullets 7. The perforating bullet 7 is connected in series with the control module 11 through the detonating cord 8. The bomb 7 is connected to a mechanical detonator 16 and an electric detonator 17. The electric detonator 17 is electrically connected to the control module 11. The mechanical detonator 16 and the electric detonator 17 are installed on the left and right sides of the perforating gun body 1 through a waterproof sealing ring 9. The control module 11 includes a first temperature sensor 14, an electrical interface 12, and a mechanical interface 13. The first temperature sensor 14 is used to monitor the temperature of the control module 11. The electrical interface 12 and the mechanical interface 13 are used to connect the electric detonator 17 and the mechanical detonator 16. The honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5 are connected by a tapered throat, wherein the honeycomb fast combustion chamber 3 can quickly generate an initial shock wave for flushing the perforation holes, the porous ceramic partition 4 can equalize the pressure fluctuation, and the slow combustion chamber 5 can continuously release high-pressure gas and extend the cracks of the holes. Based on this, a three-stage energy release from shock wave to gas expansion to continuous loading can be achieved, which can effectively increase the length of the crack extension. When the honeycomb fast combustion chamber 3 is working, it is characterized by high pressure for a short time, and when the slow combustion chamber 5 is working, it is characterized by low pressure for a long time. Based on this, pressure complementarity can be formed, which can increase the complexity of the cracks. When the perforating gun body 1 is performing perforation work through the spiral heat dissipation fins 2, the heat extraction speed of the honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5 can be increased; By arranging the perforating charges 7 in a spiral arrangement, a cluster of armor-piercing units can be formed. During construction, the ground stress control can be effectively broken through, so that the extension directions of the cracks can be increased by 2-3. It also has a good capacity utilization optimization effect and can form a perforation network, making the subsequent gas fracturing energy distribution more uniform.

[0025] Example 2: like Figures 1-4 As shown, a perforating gun suitable for a combined perforating and high-energy gas fracturing construction process, wherein the outer walls of the honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5 are all provided with spiral guide grooves 22, the inner wall of the perforating gun body 1 is provided with a gradient pressure relief hole 24, a high-energy gas chamber 6 is installed on the right side of the inner cavity of the perforating gun body 1, the gradient pressure relief hole 24 is provided on the inner wall of the perforating gun body 1, the right side of the gradient pressure relief hole 24 extends to the outside of the perforating gun body 1, a sealing plug 26 is installed on the right side of the gradient pressure relief hole 24, a tapered contraction throat 23 is provided on the left side of the gradient pressure relief hole 24 and the right side of the spiral guide groove 22, the gradient pressure relief hole 24 The aperture from left to right is 3mm-5mm-7mm, the hardness of the silicon carbide bushing 25 is 2800HV, and it is arranged at a 45° inclination angle in the inner cavity of the gradient pressure relief hole 24. The gradient pressure relief hole 24 and the silicon carbide bushing 25 are used to use the gas vortex to peel off the residual gunpowder slag in the inner cavity of the gradient pressure relief hole 24. The side of the tapered contraction throat 23 close to the spiral guide groove 22 is the inlet, and the side of the tapered contraction throat 23 close to the gradient pressure relief hole 24 is the outlet, wherein the inlet is Φ8mm and the outlet is Φ5mm. The outlet of the tapered contraction throat 23 is docked with the 3mm section of the gradient pressure relief hole 24, and the inner cavity of the gradient pressure relief hole 24 is Φ8mm. A silicon carbide bushing 25 is installed in the wall, a pressure relief pipe 19 is opened on the right side of the inside of the perforating gun body 1, and the right side of the pressure relief pipe 19 extends to the outside of the perforating gun body 1. A memory alloy pressure relief valve 18 is installed on the right side of the pressure relief pipe 19. A quick-release flange 15 is installed on the right side of the perforating gun body 1. A second temperature sensor 21 is installed in the inner cavity of the perforating gun body 1. The second temperature sensor 21 is installed in the honeycomb fast combustion chamber 3, the slow combustion chamber 5, the pressure relief pipe 19, and the high-energy gas chamber 6. The second temperature sensor 21 installed in the honeycomb fast combustion chamber 3 and the slow combustion chamber 5 is used to monitor the temperature of the gunpowder combustion in real time. The second temperature sensor 21 at 19 is used to monitor the sudden drop in the ejection temperature during the combustion of the gunpowder. The outer wall of the perforating gun body 1 is installed with spiral heat dissipation fins 2. The outer wall of the perforating gun body 1 is installed with a first pressure sensor 20. The first pressure sensor 20 is an eight-channel pressure sensor, of which the two-channel first pressure sensor 20 is used to monitor the pressure of the honeycomb fast combustion chamber 3, the porous ceramic partition 4 and the slow combustion chamber 5. The three-channel first pressure sensor 20 is used to monitor the annular pressure of the perforating gun body 1. The three-channel first pressure sensor 20 is used to monitor the pressure of the pressure relief pipe 19. The spiral guide groove 22 and the gradient pressure relief hole 24 are provided to enhance the tangential flushing force of the combustion gas. At the same time, the silicon carbide bushing 25 provided in the gradient pressure relief hole 24 can enhance the structural strength of the gradient pressure relief hole 24 while assisting it in using gas to strip residual gunpowder slag. The aperture of the gradient pressure relief hole 24 is 3mm-5mm-7mm. When the gas flows, the aperture of 3mm can produce a throttling effect, which can increase the initial flushing pressure during perforation. The aperture of 5mm can balance the pressure fluctuation and prevent the water hammer effect. The aperture of 7mm can reduce the flow rate and prolong the action time of the gas. Based on this, the gradient pressure relief hole 24 can be used to achieve pressure relief and multi-directional extension of the crack. The first pressure sensor 20 can monitor the overall pressure of the perforating gun body 1 during operation. The mechanical detonator 16 and the electric detonator 17 can be selected according to actual conditions, thereby ensuring that the perforating gun body 1 can be detonated normally.

[0026] Example 3: The outer wall of the perforating gun body 1 is coated with a nickel-based alloy to withstand seawater corrosion and high-pressure environments exceeding 50 MPa, complying with the ISO 15156 standard for offshore equipment. API 17D-certified double O-rings are installed at the mechanical initiator 16 and the electronic initiator 17 to prevent seawater intrusion. The quick-release flange 15 supports rapid installation by underwater robots and is compatible with deep-sea Christmas tree interfaces. The surface of the spiral cooling fins 2 is laser-clad with tungsten carbide to resist erosion by deep-sea currents.

[0027] It should be noted that the present invention is a perforating gun suitable for a combined perforating and high-energy gas fracturing operation process. When in use, the perforating gun body 1 is installed at a suitable construction position to perform perforating work, and the control module 11 controls the electric-controlled detonator 17 to perform detonation. When the electric-controlled detonator 17 fails, the mechanical detonator 16 is used to perform detonation work; After the electric detonator 17 or the mechanical detonator 16 is started, the perforating charge 7 is detonated by the detonating cord 8 to form a high-density perforation channel. The spirally arranged front perforating charge 7 first penetrates the outer wall of the perforating gun body 1 to form an initial hole at the construction site. The spirally arranged middle perforating charge 7 extends to the hole and generates a channel. The spirally arranged rear perforating charge 7 continues to extend until the channel forms a stepped crack initiation point. After perforation, the honeycomb fast combustion chamber 3 and the slow combustion chamber 5 are ignited in succession to produce fast phlogiston, and the channel is initially flushed and fractured. The porous ceramic partition 4 averages the pressure fluctuation. The slow combustion chamber 5 continuously releases high-pressure gas to extend the crack. At the same time, the high-energy gas chamber 6 sprays the high-pressure gas in its inner cavity into the crack wall to prevent the crack from closing. The first pressure sensor 20 monitors the pressure of the perforating gun body 1. When the preset pressure is exceeded, the memory alloy pressure relief valve 18 is opened and the pressure relief process is performed through the pressure relief pipe 19, thereby completing the perforation work. When the honeycomb fast combustion chamber 3, porous ceramic partition 4 and slow combustion chamber 5 are burning, the spiral heat dissipation fins 2 are used to assist the perforating gun body 1 in quickly extracting heat. The spiral guide grooves 22 guide the gas to flow tangentially and guide it to the gradient pressure relief hole 24 through the tapered throat 23. The pressure is released slowly through its gradually changing aperture, and the silicon carbide bushing 25 is used to strip off the residue at the same time.

[0028] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A perforating gun suitable for a perforating and high-energy gas fracturing combined operation process, comprising a perforating gun body (1), characterized in that: The inner cavity of the perforating gun body (1) is sequentially installed with a honeycomb fast combustion chamber (3), a porous ceramic partition (4), and a slow combustion chamber (5) from left to right; a control module (11) is installed in the center of the inner cavity of the perforating gun body (1); and perforating charges (7) are installed in the inner cavities of the honeycomb fast combustion chamber (3), the porous ceramic partition (4), and the slow combustion chamber (5); The outer walls of the honeycomb fast combustion chamber (3), the porous ceramic partition (4) and the slow combustion chamber (5) are all provided with spiral guide grooves (22), the inner wall of the perforating gun body (1) is provided with gradient pressure relief holes (24), and a high-energy gas chamber (6) is installed on the right side of the inner cavity of the perforating gun body (1).

2. A perforating gun suitable for a combined perforation and high-energy gas fracturing process according to claim 1, characterized in that: The inner cavity of the honeycomb fast combustion chamber (3) is filled with nitroguanidine-based propellant, the inner cavity of the slow combustion chamber (5) is filled with modified double-base propellant, and the interior of the high-energy gas chamber (6) is filled with high-energy gas. The porous ceramic partition (4) is used to homogenize the pressure fluctuations generated during combustion of the honeycomb fast combustion chamber (3). The honeycomb fast combustion chamber (3), the porous ceramic partition (4) and the slow combustion chamber (5) are connected by flanges. The honeycomb fast combustion chamber (3), the porous ceramic partition (4) and the slow combustion chamber (5) are connected by a tapered throat, and the throat diameter ratio is 1:3:

5. The porosity of the porous ceramic partition (4) is 40%. The peak pressure of the honeycomb fast combustion chamber (3) during operation is 300 MPa, and the pressure of the porous ceramic partition (4) during operation is 80-120 MPa.

3. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 1, characterized in that: The perforating bullets (7) are arranged in a spiral manner at the honeycomb fast combustion chamber (3), the porous ceramic partition (4), and the slow combustion chamber (5); the outer wall of the perforating gun body (1) is provided with blind holes (28); the number of the blind holes (28) is consistent with that of the perforating bullets (7); the positions of the blind holes (28) correspond to those of the perforating bullets (7); the side of the high-energy gas chamber (6) close to the slow combustion chamber (5) is polylactic acid (PL), which is used to degrade the slow combustion chamber (5) after ignition, thereby releasing the high-energy gas in the inner cavity of the high-energy gas chamber (6); the inner cavities of the honeycomb fast combustion chamber (3), the porous ceramic partition (4), and the slow combustion chamber (5) are connected.

4. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 3, characterized in that: The honeycomb-shaped fast-burning chamber (3), the porous ceramic partition (4) and the slow-burning chamber (5) are provided with mounting grooves (10), the perforating bullet (7) is mounted in the mounting grooves (10), and the mounting grooves (10) are spiral guide grooves, and the mounting grooves (10) are used to guide the perforating bullet (7) to perform axial displacement.

5. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 1, characterized in that: The perforating bullet (7) is provided with a detonating cord (8), which passes through the central hole of all the perforating bullets (7). The perforating bullet (7) is connected in series with the control module (11) through the detonating cord (8). The perforating bullet (7) is connected with a mechanical detonator (16) and an electric detonator (17), which are electrically connected to the control module (11). The mechanical detonator (16) and the electric detonator (17) are installed on the left and right sides of the perforating gun body (1) through a waterproof sealing ring (9).

6. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 1, characterized in that: The gradient pressure relief hole (24) is provided on the inner wall of the perforating gun body (1), the right side of the gradient pressure relief hole (24) extends to the outside of the perforating gun body (1), a sealing plug (26) is installed on the right side of the gradient pressure relief hole (24), and a conical contraction throat (23) is provided on the left side of the gradient pressure relief hole (24) and the right side of the spiral guide groove (22).

7. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 6, characterized in that: A silicon carbide bushing (25) is installed in the inner wall of the gradient pressure relief hole (24), and the aperture of the gradient pressure relief hole (24) from left to right is 3mm-5mm-7mm. The hardness of the silicon carbide bushing (25) is 2800HV, and it is arranged in the inner cavity of the gradient pressure relief hole (24) at a 45° inclination angle. The gradient pressure relief hole (24) and the silicon carbide bushing (25) are used to use gas vortex to peel off the gunpowder slag remaining in the inner cavity of the gradient pressure relief hole (24). The side of the tapered contraction throat (23) close to the spiral guide groove (22) is the inlet, and the side of the tapered contraction throat (23) close to the gradient pressure relief hole (24) is the outlet, wherein the inlet is Φ8mm and the outlet is Φ5mm. The outlet of the tapered contraction throat (23) is connected to the 3mm section of the gradient pressure relief hole (24).

8. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 1, characterized in that: The control module (11) comprises a first temperature sensor (14), an electrical interface (12) and a mechanical interface (13), wherein the first temperature sensor (14) is used to monitor the temperature of the control module (11), and the electrical interface (12) and the mechanical interface (13) are used to connect an electric-controlled detonator (17) and a mechanical detonator (16).

9. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 1, characterized in that: A pressure relief pipe (19) is provided on the right side of the interior of the perforating gun body (1), and the right side of the pressure relief pipe (19) extends to the outside of the perforating gun body (1). A memory alloy pressure relief valve (18) is installed on the right side of the pressure relief pipe (19). A quick-release flange (15) is installed on the right side of the perforating gun body (1). A second temperature sensor (21) is installed in the inner cavity of the perforating gun body (1), and the second temperature sensor (21) is installed at the honeycomb fast combustion chamber (3), the slow combustion chamber (5), the pressure relief pipe (19), and the high-energy gas chamber (6). The second temperature sensors (21) installed at the honeycomb fast combustion chamber (3) and the slow combustion chamber (5) are used to monitor the temperature of the gunpowder combustion in real time, and the second temperature sensor (21) installed at the pressure relief pipe (19) is used to monitor the sudden drop process of the ejection temperature during the combustion of the gunpowder.

10. The perforating gun suitable for the combined perforation and high-energy gas fracturing process according to claim 9, characterized in that: The outer wall of the perforating gun body (1) is installed with a spiral heat dissipation fin (2), and the outer wall of the perforating gun body (1) is installed with a first pressure sensor (20), the first pressure sensor (20), the first pressure sensor (20) is an eight-channel pressure sensor, wherein the two-channel first pressure sensors (20) are used to monitor the pressure of the honeycomb fast combustion chamber (3), the porous ceramic partition (4) and the slow combustion chamber (5), the three-channel first pressure sensor (20) is used to monitor the annular pressure of the perforating gun body (1), and the three-channel first pressure sensor (20) is used to monitor the pressure of the pressure relief pipe (19).

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