A device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure

Abstract

The invention relates to the technical field of oil production, and discloses a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure, comprising a bottom plate, an auxiliary feeding mechanism is provided on the bottom plate, the auxiliary feeding mechanism is used for auxiliary feeding, a tightening mechanism is connected to the bottom plate, the tightening mechanism is used for tightening and applying external pressure, a vibration diffusion mechanism is connected to the auxiliary feeding mechanism, and the transformation mode of shale reservoirs under different pressure conditions can be accurately simulated by accurately controlling the confining pressure, axial pressure and fluid pressure; by using a gold tube to fill a shale core sample, the integrity of the sample can be maintained under the condition of effectively transmitting the confining pressure, which is helpful for quantitative analysis of the sample after fracturing transformation; after injecting a set gas component into the sample warehouse pipe, water injection fracturing is carried out, and by monitoring the fluid content produced after fracturing, quantitative characterization of the fracturing process is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil extraction, and in particular relates to a device for transforming shale reservoirs by simulating hydraulic fracturing under limited temperature and pressure. Background Art

[0002] Shale oil and gas is a self-generated and self-stored unconventional oil and gas resource, and has become one of the most important successor resources for the current world oil and gas growth. In the past two decades, the United States has not only achieved energy self-sufficiency through the "shale oil and gas revolution", but has also become an oil and gas exporting country. Although my country is rich in shale oil and gas resources, exploration and development started late and has entered a period of rapid development in the past decade. Since my country's shale is mainly developed in a multi-stage tectonic background, its oil and gas occurrence and enrichment rules are more complex, and the exploration and development of shale oil and gas is difficult. The transformation of shale reservoirs through hydraulic fracturing is a key link in the development of shale oil and gas. Under different geological temperature and pressure conditions, various types of shale reservoirs are transformed to different degrees by hydraulic fracturing, which significantly affects the recovery rate of shale oil and gas. How to accurately evaluate the effect of hydraulic fracturing on shale reservoir transformation in complex geological environments is a key issue facing shale oil and gas development. The United States has a relatively systematic understanding of the transformation effect of its shale reservoirs through a large number of hydraulic fracturing development wells. However, due to the different development characteristics of American shale from those of Chinese shale, the reservoir transformation model based on American shale is difficult to be effectively applied to the evaluation of Chinese shale reservoirs. In addition, it takes a long time and costs a lot to directly evaluate the fracturing effect of the reservoir through actual fracturing methods, and the obtained fracturing model has poor universality. Under laboratory conditions, the reservoir transformation effect of shale can be evaluated through hydraulic fracturing simulation experiments on shale cores, but the current hydraulic fracturing simulation device has two disadvantages: first, it is difficult to accurately control the fluid pressure in the shale reservoir under high temperature conditions, and second, it is difficult to obtain a complete shale core sample after hydraulic fracturing simulation, which makes it difficult for this method to quantitatively evaluate the transformation effect of deep-ultra-deep shale reservoirs in my country's high temperature and high pressure geological environment. Under this background, it is urgent to develop a device that simulates hydraulic fracturing on shale reservoirs under limited temperature and pressure to provide important technical support for the efficient development of shale oil and gas in my country. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a device for simulating hydraulic fracturing under limited temperature and pressure to transform shale reservoirs, which effectively solves the problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure, comprising a base plate, an auxiliary feeding mechanism is provided on the base plate, the auxiliary feeding mechanism is used for auxiliary feeding, a tightening mechanism is connected to the base plate, the tightening mechanism is used for tightening and applying external pressure, a vibration diffusion mechanism is connected to the auxiliary feeding mechanism, the vibration diffusion mechanism is used for diffusing the introduced fracturing water to facilitate better infiltration into the rock for fracturing, a supporting mechanism is provided on the base plate, a closing mechanism is connected to the supporting mechanism, the closing mechanism is used for closing the reaction chamber pipe, a simulation mechanism is connected to the closing mechanism, the simulation mechanism is used for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure conditions, a detection mechanism is connected to the simulation mechanism, the detection mechanism is used for detecting water seepage in the rock, and a centrifugal diffusion mechanism is connected to the simulation mechanism, the centrifugal diffusion mechanism is used for centrifugally diffusing the introduced water.

[0005] Preferably, the supporting mechanism includes supporting rods fixedly connected at the four corners of the base plate, a sliding plate is slidably connected to the supporting rods, a return spring is clamped between the sliding plate and the base plate, the return spring is sleeved on the outer surface of the supporting rod, and an upper mounting plate is fixedly connected to the upper end of the supporting rod.

[0006] Preferably, the sealing mechanism includes a lower rotating disk rotatably connected to the sliding plate, a lower sealing disk being fixedly connected to the upper portion of the lower rotating disk, the lower sealing disk being inserted into the lower side of the sample warehouse tube for sealing, and an upper rotating disk rotatably connected to the upper mounting plate, an upper sealing disk being fixedly connected to the lower portion of the upper rotating disk, the upper sealing disk being inserted into the upper side of the sample warehouse tube for sealing.

[0007] Preferably, the simulation mechanism includes a four-way valve fixedly connected to the upper rotating disk, each channel port of the four-way valve is connected to a communication control valve, a high-pressure gas cylinder is fixedly connected to the upper rotating disk, the high-pressure gas cylinder and the communication control valve at the first channel port of the four-way valve are connected through a gas transmission pipe, a vacuum pump is fixedly connected to the upper rotating disk, the vacuum pump and the communication control valve at the second channel port of the four-way valve are connected through an exhaust pipe, the communication control valve at the third channel port of the four-way valve is connected to one end of a flow meter, and the other end of the flow meter is also connected to the communication control valve, the communication control valve at the fourth channel port of the four-way valve is connected to a connecting channel, the connecting channel is arranged in the upper rotating disk, and the connecting channel extends to the upper sealing disk and extends to the bottom of the upper sealing disk, the upper sealing disk is inserted into the sample bin tube, a gold tube is installed in the sample bin tube, the sample bin tube is installed in the intelligent temperature control furnace body, and the outer surface of the intelligent temperature control furnace body is symmetrically and detachably connected with a matching fixing frame, The matching fixed frame is rotatably connected with the rotating annular frame, a threaded tube is threadedly connected through the intelligent temperature control furnace body, the threaded tube extends into the sample bin tube, the threaded tube and the matching fixed frame are detachably connected, the connecting control valve is connected to the rotating annular frame, the connecting control valve on the upper side is connected to the water injection pump through a water delivery pipe, the water injection pump is fixedly connected to the lower part of the upper mounting plate, an annular cavity is provided in the sliding plate, a rotating sealing annular frame is rotatably connected between the end walls of the annular cavity, the rotating sealing annular frame is fixedly connected to the lower rotating disk, the lower rotating disk is processed with the water injection channel, the water injection channel is connected with the rotating sealing annular frame, the water injection channel extends to the upper part of the lower sealing disk, the end wall of the annular cavity is provided with a water inlet channel, the water inlet channel is connected with the connecting control valve fixedly installed on the sliding plate, a hydraulic pressure pump is fixedly connected to the bottom plate, the hydraulic pressure pump is connected to the connecting control valve on the first channel port of the three-way valve, and the connecting control valve is fixedly connected to each channel port on the three-way valve.

[0008] Preferably, the auxiliary feeding mechanism comprises a vertical plate symmetrically fixedly connected to the bottom plate, a limiting slide bar is fixedly connected between the end walls of the vertical plates, an auxiliary slide bar is slidably connected to the limiting slide bar, the auxiliary slide bar is slidably connected to the vertical plate, a stabilizing spring is clamped between the auxiliary slide bar and the bottom wall of the vertical plate, the stabilizing spring is sleeved on the outer surface of the limiting slide bar, an auxiliary box is fixedly connected to the end wall of the auxiliary slide bar, a stabilizing ring is fixedly connected to the end wall of the auxiliary box, the stabilizing ring is slidably connected to the vertical plate, an auxiliary gear cavity is provided in the auxiliary box, an auxiliary driving gear shaft is rotatably connected between the end walls of the auxiliary gear cavity, and the auxiliary main The driven gear shaft is connected to the auxiliary motor power output shaft fixedly installed in the auxiliary box, an auxiliary driving gear shaft is fixedly installed on the outer surface of the auxiliary driving gear shaft, the auxiliary driving gear shaft is meshed with the auxiliary driven gear, the auxiliary driven gear is fixedly installed on the outer surface of the auxiliary rotating shaft, the auxiliary rotating shaft is rotatably installed on the end wall of the auxiliary gear cavity, a vibration cylinder is fixedly connected to the end of the auxiliary rotating shaft, a braking electric push rod for pushing the braking teeth is fixed on the end wall of the auxiliary gear cavity, the braking teeth are fixedly installed on the end of the braking electric push rod, the braking electric push rod pushes the braking teeth to mesh with the auxiliary driven gear to brake the auxiliary rotating shaft.

[0009] Preferably, the detection mechanism comprises an L-shaped mounting plate fixedly connected to the upper part of the upper rotating disk, a detection screw is rotatably connected to the L-shaped mounting plate, the detection screw is power-connected to a lifting motor fixedly mounted on the upper rotating disk, a detection nut plate is threadedly connected to the outer surface of the detection screw, a detection gear cavity is provided in the detection nut plate, a detection driving gear shaft is rotatably connected between the end walls of the detection gear cavity, the detection driving gear shaft is power-connected to a driving motor fixedly mounted in the detection nut plate, a detection driving gear is fixedly connected to the outer surface of the detection driving gear shaft, the detection driving gear meshes with the detection driven gear, the detection driven gear is fixedly mounted on the outer surface of the detection drill rod, the detection drill rod is hollow inside, the detection drill rod penetrates and is rotatably mounted between the end walls of the detection gear cavity, and the detection drill The upper end of the rod extends into a collecting box, and the collecting box is fixedly mounted on the upper part of the detection nut plate. The detection drill rod is rotatably connected to an extraction pump fixedly mounted in the collection box for extracting rock powder generated by drilling. A number of detection sensors for detecting water penetration in rocks are evenly and evenly fixedly mounted on the outer surface of the detection drill rod. A drill bit is fixedly connected to the lower end of the detection drill rod. A detection channel through which the drill bit and the detection drill rod pass is machined on the upper rotating disk. A sealing ring made of flexible material is fixedly mounted between the end walls of the detection channel. The sealing ring is used to form a seal between the detection drill rods. The detection channel extends to the bottom wall of the upper sealing disk. A through hole is machined on the detection drill rod above the drill bit to facilitate powder extraction, and the through hole is connected to the inside of the detection drill rod.

[0010] Preferably, the vibration diffusion mechanism includes a vibration gear cavity provided in the vibration cylinder, a vibration shaft is rotatably connected between the end walls of the vibration gear cavity, a sliding sleeve is slidably connected to the outer surface of the vibration shaft, a lifting plate is rotatably connected to the sliding sleeve, one end of a lifting electric push rod is fixedly connected to the upper part of the lifting plate, the other end of the lifting electric push rod is fixedly connected to the upper end wall of the vibration gear cavity, a large gear is fixedly connected to the outer surface of the sliding sleeve, the large gear is meshed with a vibration annular rack, the vibration annular rack is rotatably connected to the end wall of the vibration gear cavity, the vibration annular rack is fixedly mounted on the outer surface of the intelligent temperature control furnace body that drives the vibration annular rack to rotate, and the intelligent temperature control furnace body and the vibration cylinder are rotatably connected. Then, a small gear is fixedly connected to the outer surface of the sliding sleeve on the upper part of the large gear, and the small gear is meshed with an idler gear. The idler gear is fixedly installed on the lower end of the idler gear shaft, and the idler gear shaft is rotatably installed on the lower part of the lifting plate, and the idler gear is meshed with the vibration annular rack. The vibration shaft extends into the vibration cylinder on the lower side of the vibration gear cavity, and a plurality of vibration fixing rods are fixedly connected to the outer surface of the vibration slide rod at uniform and equal intervals, and a vibration slide rod is slidably connected in the vibration fixing rod, and a vibration spring is connected to the vibration slide rod and the inner part of the vibration fixing rod, and a hemispherical mounting frame is fixedly connected to the end of the vibration slide rod, and a spherical block is universally rotatably connected to the hemispherical mounting frame, and the spherical block knocks and vibrates the surface of the intelligent temperature control furnace body.

[0011] Preferably, the tightening mechanism includes a lower groove block fixedly connected to the base plate, one end of a lower connecting rod is symmetrically hinged on the lower groove block, the other end of the lower connecting rod is hinged to the tightening nut block, one end of an upper connecting rod is hinged on the tightening nut block, the other end of the upper connecting rod is hinged to the upper groove block, the upper groove block is fixedly installed on the lower part of the disk, the disk is rotatably connected to the lower part of the lower rotating disk, the tightening nut block is threadedly connected to the tightening screw rod driving its movement, and the end of the tightening screw rod is fixedly connected to a hand wheel driving its rotation.

[0012] Preferably, the centrifugal diffusion mechanism includes a centrifugal gear shaft rotatably connected to the sliding plate, the centrifugal gear shaft is dynamically connected to a centrifugal motor that drives it to rotate, the centrifugal motor is fixedly installed in the sliding plate, a centrifugal gear is fixedly connected to the upper end of the centrifugal gear shaft, and the centrifugal gear is meshed with a centrifugal annular rack fixedly installed on the outer side of the lower rotating disk.

[0013] Preferably, the intelligent temperature control furnace body is connected to a clamping mechanism, and the clamping mechanism includes a fixing ring that is symmetrically and detachably connected to the intelligent temperature control furnace body, and a clamping active gear shaft is rotatably connected in the fixing ring, and the clamping active gear shaft is dynamically connected to a clamping motor that drives it to rotate, and the clamping motor is fixedly installed in the fixing ring, and a clamping active gear is fixedly connected to the end of the clamping active gear shaft, and the clamping active gear is meshed with one side surface of a clamping annular rack, and the clamping annular rack is rotatably installed in the fixing ring, and the other side surface of the clamping annular rack is meshed with a plurality of clamping driven gears, and the clamping driven gear is fixedly installed on the outer surface of a clamping screw rod, and the clamping screw rod is rotatably connected in the fixing ring, and a clamping threaded sleeve is threadedly connected to the outer surface of the clamping screw rod, and the clamping screw rod pushes the clamping threaded sleeve to move, and the clamping threaded sleeve is slidably connected to the fixing ring, and a clamping arc plate is fixedly connected to the end of the clamping threaded sleeve, and the clamping arc plate clamps the sample warehouse tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure. By precisely controlling the confining pressure, axial pressure and fluid pressure, the transformation mode of shale reservoirs under different pressure conditions can be accurately simulated.

[0016] 2. The present invention provides a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure. By using a gold tube to fill the shale core sample, the integrity of the sample can be maintained under the condition of effectively transmitting the confining pressure, which is helpful for conducting quantitative analysis of the sample after fracturing transformation.

[0017] 3. The present invention provides a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure. After injecting a set gas component into a sample bin pipe, water injection fracturing is performed. By monitoring the fluid content produced after fracturing, quantitative characterization of the fracturing process is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the first direction structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0021] Figure 2 It is a schematic diagram of the second direction structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0022] Figure 3 It is a schematic diagram of the third direction structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0023] Figure 4 It is a schematic diagram of the structure in the fourth direction of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0024] Figure 5 This is a schematic diagram of the first split structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0025] Figure 6 This is a schematic diagram of a second split structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0026] Figure 7 This is a schematic diagram of the third split structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0027] Figure 8 This is a schematic diagram of the fourth split structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0028] Fig. 9 This is a schematic diagram of the fifth split structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0029] Fig.10 A schematic diagram of a direction mechanism of the detection mechanism of the present invention;

[0030] Fig.11 It is a schematic diagram of another direction mechanism of the detection mechanism in the present invention;

[0031] Fig.12 A schematic diagram of the structure of a combination of a vibration diffusion mechanism and a clamping mechanism in one direction of the present invention;

[0032] Fig.13 It is a schematic diagram of the structure of the combination of the vibration diffusion mechanism and the clamping mechanism in another direction of the present invention;

[0033] Fig.14 A schematic diagram of the structure of the tightening mechanism in one direction of the present invention;

[0034] Fig.15 It is a schematic diagram of the structure of the tightening mechanism in another direction of the present invention;

[0035] Fig.16 It is a schematic diagram of the fifth direction structure of a device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure in the present invention;

[0036] Fig.17 for Fig.16 Schematic diagram of the cross-sectional structure at AA in the middle;

[0037] Fig.18 for Fig.16 Schematic diagram of the cross-sectional structure at the middle BB;

[0038] Fig.19 for Fig.18 Schematic diagram of the enlarged structure at C in the middle;

[0039] Fig. 20 for Figure 6 Schematic diagram of the enlarged structure at D in the middle.

[0040] In the figure: 1-bottom plate, 2-reset spring, 3-sliding plate, 4-support rod, 5-centrifugal annular rack, 6-vertical plate, 7-vibrating cylinder, 8-auxiliary box, 9-fixing ring, 10-upper mounting plate, 11-upper rotating disk, 12-L-shaped mounting plate, 13-detection screw rod, 14-detection nut plate, 15-collection box, 16-detection drill rod, 17-four-way valve, 18-flow meter, 19-connecting control valve, 20-high-pressure gas cylinder, 21-stabilizing ring, 22-lower rotating disk, 23-tightening nut block, 24-lower connecting rod, 25- Upper connecting rod, 26-tightening screw rod, 27-upper groove block, 28-gold tube, 29-sample chamber tube, 30-water injection pump, 31-vacuum pump, 32-three-way valve, 33-centrifugal gear, 34-large gear, 35-small gear, 36-vibration ring rack, 37-vibration shaft, 38-vibration fixing rod, 39-vibration slide bar, 40-lower groove block, 41-centrifugal gear shaft, 42-hydraulic pressure pump, 43-auxiliary shaft, 44-lifting plate, 45-lifting electric push rod, 46-idle wheel, 47-sliding sleeve, 48-brake tooth, 49-brake electric push rod, 50-auxiliary driven gear, 51-auxiliary slider, 52-auxiliary driving gear, 53-auxiliary driving gear shaft, 54-detection sensor, 55-sealing ring, 56-intelligent temperature control furnace, 57-drill, 58-through hole, 59-extraction pump, 60-clamping driving gear shaft, 61-clamping driving gear, 62-clamping annular rack, 63-clamping arc plate, 64-clamping threaded sleeve, 65-clamping screw rod, 66-clamping driven gear, 67-idle gear shaft, 68-rotating annular frame, 69-matching fixed frame , 70-disc, 71-annular cavity, 72-rotating sealing annular frame, 73-water injection channel, 74-detection gear cavity, 75-detection driven gear, 76-detection driving gear shaft, 77-detection driving gear, 78-connecting channel, 79-vibration gear cavity, 80-auxiliary gear cavity, 81-limiting slide bar, 82-stabilizing spring, 83-threaded tube, 84-vibration spring, 85-hemispherical mounting frame, 86-spherical block, 87-detection channel, 88-lower sealing disk, 89-upper sealing disk, 90-water inlet channel, 91-handwheel. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] like Figure 1-19As shown, the present invention provides a device for simulating hydraulic fracturing under limited temperature and pressure to transform shale reservoirs, comprising a bottom plate 1, an auxiliary feeding mechanism is provided on the bottom plate 1, the auxiliary feeding mechanism is used for auxiliary feeding, a tightening mechanism is connected to the bottom plate 1, the tightening mechanism is used for tightening and applying external pressure, a vibration diffusion mechanism is connected to the auxiliary feeding mechanism, the vibration diffusion mechanism is used for diffusing the introduced fracturing water, so as to better penetrate into the rock for fracturing, a supporting mechanism is provided on the bottom plate 1, a sealing mechanism is connected to the supporting mechanism, the sealing mechanism is used for sealing the reaction chamber pipe, a simulation mechanism is connected to the sealing mechanism, the simulation mechanism is used for simulating hydraulic fracturing under limited temperature and pressure conditions to transform shale reservoirs, a detection mechanism is connected to the simulation mechanism, the detection mechanism is used for detecting the water seepage in the rock, and a centrifugal diffusion mechanism is connected to the simulation mechanism, the centrifugal diffusion mechanism is used for centrifugally diffusing the introduced water;

[0043] During operation, the auxiliary feeding mechanism moves to facilitate feeding. After the feeding is completed, the tightening mechanism moves to push the sliding plate 3 to move upward, so that the closing mechanism closes the upper and lower sides of the sample storage tube 29. After closing, the simulation mechanism moves to perform simulation. During simulation, the vibration diffusion mechanism moves to vibrate and diffuse the water injected into the rock. After the vibration diffusion, the detection mechanism moves to detect the fracturing penetration. The centrifugal diffusion mechanism moves to centrifugally diffuse the water injected into the rock. After the centrifugal diffusion, the detection mechanism moves to detect the centrifugal diffusion.

[0044] Advantageously, the support mechanism comprises support rods 4 fixedly connected to the four corners of the base plate 1, a sliding plate 3 is slidably connected to the support rods 4, a return spring 2 is clamped between the sliding plate 3 and the base plate 1, the return spring 2 is sleeved on the outer surface of the support rod 4, and an upper mounting plate 10 is fixedly connected to the upper end of the support rod 4;

[0045] During operation, when the sliding plate 3 is pushed upward, the reset spring 2 is stretched, so as to close the lower part of the sample chamber tube 29 .

[0046] Advantageously, the sealing mechanism comprises a lower rotating disk 22 rotatably connected to the sliding plate 3, a lower sealing disk 88 is fixedly connected to the upper portion of the lower rotating disk 22, and the lower sealing disk 88 is inserted into the lower side of the sample storage tube 29 for sealing, and an upper rotating disk 11 is rotatably connected to the upper mounting plate 10, an upper sealing disk 89 is fixedly connected to the lower portion of the upper rotating disk 11, and the upper sealing disk 89 is inserted into the upper side of the sample storage tube 29 for sealing;

[0047] During operation, when the sliding plate 3 moves upward, it drives the lower rotating plate 22 to move upward, thereby driving the lower sealing plate 88 to move upward and insert into the lower part of the sample warehouse tube 29, thereby closing the lower part of the sample warehouse tube 29. After closing, the sample warehouse tube 29 is pushed upward as a whole, so that the upper sealing plate 89 is inserted into the upper part of the sample warehouse tube 29, thereby closing the sample warehouse tube 29, and the upper and lower sides of the sample warehouse tube 29 are closed and tightened by the lower sealing plate 88 and the upper sealing plate 89.

[0048] Advantageously, the simulation mechanism includes a four-way valve 17 fixedly connected to the upper rotating disk 11, each channel port of the four-way valve 17 is connected to a communication control valve 19, a high-pressure gas cylinder 20 is fixedly connected to the upper rotating disk 11, the high-pressure gas cylinder 20 is connected to the communication control valve 19 at the first channel port of the four-way valve 17 through a gas delivery pipe, a vacuum pump 31 is fixedly connected to the upper rotating disk 11, the vacuum pump 31 is connected to the communication control valve 19 at the second channel port of the four-way valve 17 through an exhaust pipe, and a flow meter 1 is connected to the communication control valve 19 at the third channel port of the four-way valve 17 8, the other end of the flow meter 18 is also connected to the connecting control valve 19, the connecting control valve 19 on the fourth channel port of the four-way valve 17 is connected to the connecting channel 78, the connecting channel 78 is arranged in the upper rotating disk 11, and the connecting channel 78 extends to the upper sealing disk 89 and extends to the bottom of the upper sealing disk 89, the upper sealing disk 89 is inserted into the sample warehouse tube 29, the gold tube 28 is installed in the sample warehouse tube 29, the sample warehouse tube 29 is installed in the intelligent temperature control furnace body 56, the outer surface of the intelligent temperature control furnace body 56 is symmetrically and detachably connected with a matching fixing frame 69, the The matching fixed frame 69 is rotatably connected with the rotating annular frame 68, a threaded tube 83 is threadedly connected through the intelligent temperature control furnace body 56, the threaded tube 83 extends into the sample bin tube 29, the threaded tube 83 and the matching fixed frame 69 are detachably connected, the connecting control valve 19 is connected to the rotating annular frame 68, the connecting control valve 19 on the upper side is connected to the water injection pump 30 through a water pipe, the water injection pump 30 is fixedly connected to the lower part of the upper mounting plate 10, an annular cavity 71 is provided in the sliding plate 3, a rotating sealing annular frame 72 is rotatably connected between the end walls of the annular cavity 71, and the rotating sealing annular frame 72 is connected to the The lower rotating disk 22 is fixedly connected, the lower rotating disk 22 is processed with the water injection channel 73, the water injection channel 73 is communicated with the rotating sealing annular frame 72, the water injection channel 73 extends to the upper part of the lower sealing disk 88, the end wall of the annular cavity 71 is provided with a water inlet channel 90, the water inlet channel 90 is communicated with the communication control valve 19 fixedly installed on the sliding plate 3, the bottom plate 1 is fixedly connected with a hydraulic pressure pump 42, the hydraulic pressure pump 42 is connected with the communication control valve 19 on the first channel port of the three-way valve 32, and each channel port on the three-way valve 32 is fixedly connected with the communication control valve 19;

[0049] During operation, the gold tube 28 is installed in the sample storage tube 29. After the material is injected into the gold tube 28, the upper and lower sides of the sample storage tube 29 are closed, and the water injection pump 30 is started to inject water. The water enters the rotating annular frame 68 on the upper side through the water delivery pipe, enters the threaded tube 83 through the matching fixed frame 69, and then enters between the gold tube 28 and the sample storage tube 29 to form a confining pressure, support the gold tube 28, tighten the pressing mechanism, apply external pressure, open and close the corresponding connecting control valve 19, and at the same time control the intelligent temperature control furnace body 56 The system is heated and heated to reach the set temperature and pressure conditions, which are kept constant for 2 hours, and the system is evacuated by the vacuum pump 31, so that the gas in the gold tube 28 passes through the connecting channel 78, the connecting control valve 19, the four-way valve 17, and the exhaust pipe into the vacuum pump 31, and is discharged through the vacuum pump 31, thereby evacuating the inside of the gold tube 28, and then a set volume of gas is injected through the high-pressure gas cylinder 20, and the gas in the high-pressure gas cylinder 20 passes through the gas delivery pipe into the four-way valve 17, and passes through the connecting control valve 19 into the connecting channel 7 8, enters the gold tube 28 through the connecting channel 78, and after reaching the set gas volume, stop inputting gas, keep constant for 6 hours under the set temperature and pressure conditions, start the hydraulic pressure pump 42 to inject water, so that water enters the clamping driving gear shaft 60 through the three-way valve 32, and then enters the annular cavity 71, enters the water injection channel 73 through the rotating sealing annular frame 72, and enters the gold tube 28 through the water injection channel 73, thereby entering the rock sample, reaching the set water injection pressure, keeping constant for 6 hours, and open the connection with the flow meter 18 The connecting control valve 19 is opened to release the corresponding fluid components in the gold tube 28, the connecting control valve 19 connected to the three-way valve 32 is opened to discharge the water in the gold tube 28, and the connecting control valve 19 connected to the rotating annular frame 68 on the lower side is opened to discharge the water between the sample warehouse tube 29 and the gold tube 28. After the pressure is released, the gold tube 28 is taken out of the sample warehouse tube 29, and the plunger sample after pressure is obtained to carry out research such as pore structure characterization, and to identify the transformation of shale reservoirs by simulated hydraulic fracturing under limited temperature and pressure conditions.

[0050] Advantageously, the auxiliary feeding mechanism comprises a vertical plate 6 symmetrically fixedly connected to the bottom plate 1, a limiting slide bar 81 is fixedly connected between the end walls of the vertical plate 6, an auxiliary slider 51 is slidably connected to the limiting slide bar 81, the auxiliary slider 51 is slidably connected to the vertical plate 6, a stabilizing spring 82 is clamped between the auxiliary slider 51 and the bottom wall of the vertical plate 6, the stabilizing spring 82 is sleeved on the outer surface of the limiting slide bar 81, an auxiliary box 8 is fixedly connected to the end wall of the auxiliary slider 51, a stabilizing ring 21 is fixedly connected to the end wall of the auxiliary box 8, the stabilizing ring 21 is slidably connected to the vertical plate 6, an auxiliary gear cavity 80 is provided in the auxiliary box 8, an auxiliary driving gear shaft 53 is rotatably connected between the end walls of the auxiliary gear cavity 80, and the auxiliary driving gear shaft 53 is rotatably connected to the auxiliary driving gear shaft 53. The gear shaft 53 is connected to the auxiliary motor power output shaft fixedly installed in the auxiliary box 8, the auxiliary driving gear shaft 53 is fixedly installed on the outer surface of the auxiliary driving gear shaft 53, the auxiliary driving gear shaft 53 is meshed with the auxiliary driven gear 50, the auxiliary driven gear 50 is fixedly installed on the outer surface of the auxiliary rotating shaft 43, the auxiliary rotating shaft 43 is rotatably installed on the end wall of the auxiliary gear cavity 80, the end of the auxiliary rotating shaft 43 is fixedly connected to the vibration cylinder 7, the end wall of the auxiliary gear cavity 80 is fixed with a brake electric push rod 49 for pushing the brake tooth 48, the brake tooth 48 is fixedly installed on the end of the brake electric push rod 49, the brake electric push rod 49 pushes the brake tooth 48 to mesh with the auxiliary driven gear 50 to brake the auxiliary rotating shaft 43;

[0051] During operation, when adding materials, the auxiliary motor is started, thereby driving the auxiliary driving gear shaft 53 to rotate, thereby driving the auxiliary driving gear 52 to rotate, and the auxiliary driving gear 52 is meshed with the auxiliary driven gear 50, thereby driving the auxiliary rotating shaft 43 to rotate, thereby driving the vibration cylinder 7 to rotate, thereby driving the intelligent temperature control furnace body 56 to rotate, thereby driving the sample warehouse tube 29 to rotate, thereby driving the gold tube 28 to rotate, and after rotating to the horizontal direction, inject material into the gold tube 28. After the injection is completed, the vibration cylinder 7 is reset. After resetting, the brake electric push rod 49 moves, thereby pushing the brake tooth 48 to move and engage with the auxiliary driven gear 50 for braking, thereby preventing the vibration cylinder 7 from rotating.

[0052] Advantageously, the detection mechanism includes an L-shaped mounting plate 12 fixedly connected to the upper part of the upper rotating disk 11, a detection screw rod 13 is rotatably connected to the L-shaped mounting plate 12, the detection screw rod 13 is connected to the lifting motor power fixedly installed on the upper rotating disk 11, a detection nut plate 14 is threadedly connected to the outer surface of the detection screw rod 13, a detection gear cavity 74 is provided in the detection nut plate 14, a detection driving gear shaft 76 is rotatably connected between the end walls of the detection gear cavity 74, the detection driving gear shaft 76 is connected to the driving motor power fixedly installed in the detection nut plate 14, a detection driving gear 77 is fixedly connected to the outer surface of the detection driving gear shaft 76, the detection driving gear 77 is meshed with the detection driven gear 75, the detection driven gear 75 is fixedly installed on the outer surface of the detection drill rod 16, the detection drill rod 16 is hollow inside, the detection drill rod 16 is rotatably installed between the end walls of the detection gear cavity 74, and the detection drill rod 16 is fixedly installed on the outer surface of the detection drill rod 16. The upper end of the rod 16 extends into the collecting box 15, and the collecting box 15 is fixedly mounted on the upper part of the detection nut plate 14. The detection drill rod 16 is rotatably connected to an extraction pump 59 fixedly mounted in the collecting box 15 for extracting rock powder generated by drilling. A number of detection sensors 54 for detecting water penetration in rocks are evenly and evenly fixedly mounted on the outer surface of the detection drill rod 16. A drill bit 57 is fixedly connected to the lower end of the detection drill rod 16. A detection channel through which the drill bit 57 and the detection drill rod 16 pass is machined on the upper rotating disk 11. A sealing ring 55 made of flexible material is fixedly mounted between the end walls of the detection channel. The sealing ring 55 is used to form a seal between the detection drill rod 16. The detection channel extends to the bottom wall of the upper sealing disk 89. A through hole 58 for convenient powder extraction is machined on the detection drill rod 16 above the drill bit 57, and the through hole 58 is connected to the inside of the detection drill rod 16.

[0053] During operation, the lifting motor is started to drive the detection screw rod 13 to rotate, thereby driving the detection nut plate 14 to move downward, thereby driving the detection drill rod 16 to move downward, and the driving motor is started to drive the detection active gear shaft 76 to rotate, thereby driving the detection active gear 77 to rotate, and the detection active gear 77 is meshed with the detection driven gear 75, thereby driving the detection drill rod 16 to rotate and move downward, thereby driving the drill bit 57 to rotate and move downward, drilling into the rock sample, and starting the extraction pump 59 to pump air, thereby extracting the powder generated during drilling, entering the detection drill rod 16 through the through hole 58, and entering the collection box 15 through the detection drill rod 16, and the detection sensor 54 detects the water seepage on the inner wall of the borehole, and judges the water diffusion situation through the detected water seepage situation.

[0054] Advantageously, the vibration diffusion mechanism includes a vibration gear cavity 79 provided in the vibration cylinder 7, a vibration shaft 37 is rotatably connected between the end walls of the vibration gear cavity 79, a sliding sleeve 47 is slidably connected to the outer surface of the vibration shaft 37, a lifting plate 44 is rotatably connected to the sliding sleeve 47, one end of a lifting electric push rod 45 is fixedly connected to the upper part of the lifting plate 44, the other end of the lifting electric push rod 45 is fixedly connected to the upper end wall of the vibration gear cavity 79, a large gear 34 is fixedly connected to the outer surface of the sliding sleeve 47, the large gear 34 is meshed with a vibration annular rack 36, the vibration annular rack 36 is rotatably connected to the end wall of the vibration gear cavity 79, the vibration annular rack 36 is fixedly mounted on the outer surface of the intelligent temperature control furnace body 56 that drives the vibration annular rack 36 to rotate, the intelligent temperature control furnace body 56 is rotatably connected to the vibration cylinder 7, the The outer surface of the sliding sleeve 47 on the upper part of the large gear 34 is fixedly connected with a small gear 35, and the small gear 35 is meshed with an idler gear 46. The idler gear 46 is fixedly mounted on the lower end of the idler shaft 67, and the idler shaft 67 is rotatably mounted on the lower part of the lifting plate 44. The idler gear 46 is meshed with the vibration annular rack 36. The vibration shaft 37 extends into the vibration cylinder 7 on the lower side of the vibration gear cavity 79. The outer surface of the vibration slide bar 39 is evenly and evenly fixedly connected with a plurality of vibration fixing rods 38. The vibration fixing rod 38 is slidably connected with a vibration slide bar 39. The vibration slide bar 39 and the vibration fixing rod 38 are connected with a vibration spring 84. The end of the vibration slide bar 39 is fixedly connected with a hemispherical mounting bracket 85, and a spherical block 86 is universally rotatably connected to the hemispherical mounting bracket 85. The spherical block 86 performs knocking and vibration on the surface of the intelligent temperature control furnace body 56.

[0055] During operation, when the intelligent temperature control furnace body 56 rotates, the vibration annular rack 36 is driven to rotate, and the vibration annular rack 36 is meshed with the large gear 34, thereby driving the sliding sleeve 47 to rotate, thereby driving the vibration shaft 37 to rotate, thereby driving the vibration fixing rod 38 to rotate, thereby driving the vibration slide rod 39 to move, so that the vibration spring 84 extends, thereby driving the hemispherical mounting bracket 85 to move, thereby driving the spherical block 86 to move and knock on the surface of the intelligent temperature control furnace body 56, thereby vibrating. To speed up the vibration rate, the lifting electric push rod 45 is energized to drive the lifting plate 44 to move downward, thereby driving the sliding sleeve 47 to slide downward, thereby driving the idler wheel 46 to move downward and engage with the vibration annular rack 36, the vibration annular rack 36 engages with the idler wheel 46, thereby driving the idler wheel 46 to rotate, the idler wheel 46 engages with the pinion 35, thereby driving the sliding sleeve 47 to rotate, thereby driving the vibration shaft 37 to rotate, increasing the rotation speed of the vibration shaft 37, thereby increasing the vibration rate.

[0056] Advantageously, the tightening mechanism comprises a lower groove block 40 fixedly connected to the bottom plate 1, one end of a lower connecting rod 24 is symmetrically hinged on the lower groove block 40, the other end of the lower connecting rod 24 is hinged to the tightening nut block 23, one end of an upper connecting rod 25 is hinged on the tightening nut block 23, the other end of the upper connecting rod 25 is hinged to the upper groove block 27, the upper groove block 27 is fixedly mounted on the lower part of the disc 70, the disc 70 is rotatably connected to the lower part of the lower rotating disc 22, the tightening nut block 23 is threadedly connected to the tightening screw rod 26 driving the tightening nut block 23 to move, and the end of the tightening screw rod 26 is fixedly connected to a hand wheel 91 driving the tightening screw rod 26 to rotate;

[0057] During operation, the hand wheel 91 is manually rotated to drive the tightening screw 26 to rotate. The tightening screw 26 is threadedly connected to the tightening nut block 23, thereby driving the tightening nut block 23 to move, thereby driving the lower connecting rod 24 and the upper connecting rod 25 to rotate, thereby pushing the upper groove block 27 to move upward, thereby pushing the disc 70 to move upward, thereby pushing the lower rotating disc 22 to move upward, thereby pushing the sliding plate 3 to move upward, thereby pushing the gold tube 28 to move upward, thereby pushing the vibration cylinder 7 to move, so that the auxiliary box 8 moves upward, thereby driving the auxiliary slider 51 to move upward, thereby driving the stabilizing spring 82 to move upward, and when the sample warehouse tube 29 moves upward, it contacts the upper sealing disk 89 to close the sample warehouse tube 29, and when tightening upward, external pressure is applied to the inside of the gold tube 28.

[0058] Advantageously, the centrifugal diffusion mechanism comprises a centrifugal gear shaft 41 rotatably connected to the sliding plate 3, the centrifugal gear shaft 41 is connected to a centrifugal motor for driving the centrifugal gear shaft 41 to rotate, the centrifugal motor is fixedly installed in the sliding plate 3, the upper end of the centrifugal gear shaft 41 is fixedly connected to a centrifugal gear 33, and the centrifugal gear 33 is meshed with a centrifugal annular rack 5 fixedly installed on the outer side of the lower rotating disk 22;

[0059] During operation, the centrifugal motor is started to drive the centrifugal gear shaft 41 to rotate, thereby driving the centrifugal gear 33 to rotate, and the centrifugal gear 33 is meshed with the centrifugal annular rack 5, thereby driving the lower rotating disk 22 to rotate, thereby driving the gold tube 28 to rotate, thereby performing centrifugal diffusion.

[0060] Advantageously, the intelligent temperature-controlled furnace body 56 is connected with a clamping mechanism, and the clamping mechanism includes a fixing ring 9 symmetrically and detachably connected to the intelligent temperature-controlled furnace body 56, and a clamping driving gear shaft 60 is rotatably connected in the fixing ring 9, and the clamping driving gear shaft 60 is connected to the clamping motor power driving the clamping motor, and the clamping motor is fixedly installed in the fixing ring 9, and a clamping driving gear 61 is fixedly connected to the end of the clamping driving gear shaft 60, and the clamping driving gear 61 is meshed with one side surface of the clamping annular rack 62, and the clamping annular rack 62 is rotatably installed in the fixing ring 9. In the ring 9, the other side surface of the clamping annular rack 62 is meshed with a plurality of clamping driven gears 66, and the clamping driven gears 66 are fixedly mounted on the outer surface of the clamping screw 65, and the clamping screw 65 is rotatably connected in the fixing ring 9, and the outer surface of the clamping screw 65 is threadedly connected with a clamping thread sleeve 64, and the clamping screw 65 pushes the clamping thread sleeve 64 to move, and the clamping thread sleeve 64 penetrates and is slidably connected to the fixing ring 9, and the end of the clamping thread sleeve 64 is fixedly connected with a clamping arc plate 63, and the clamping arc plate 63 clamps the sample bin tube 29;

[0061] During operation, the clamping motor is started to drive the clamping active gear shaft 60 to rotate, thereby driving the clamping active gear 61 to rotate, the clamping active gear 61 is meshed with the clamping annular rack 62, thereby driving the clamping annular rack 62 to rotate, the clamping annular rack 62 is meshed with the clamping driven gear 66, thereby driving the clamping screw rod 65 to rotate, thereby pushing the clamping threaded sleeve 64 to move, thereby pushing the clamping arc plate 63 to move, thereby clamping the sample warehouse tube 29 and installing it on the intelligent temperature control furnace body 56.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure, characterized in that: The invention comprises a bottom plate (1), wherein an auxiliary feeding mechanism is provided on the bottom plate (1), wherein the auxiliary feeding mechanism is used for auxiliary feeding, wherein a tightening mechanism is connected to the bottom plate (1), wherein the tightening mechanism is used for tightening and applying external pressure, wherein a vibration diffusion mechanism is connected to the auxiliary feeding mechanism, wherein the vibration diffusion mechanism is used for diffusing the introduced fracturing water so as to facilitate better penetration into the rock for fracturing, wherein a supporting mechanism is provided on the bottom plate (1), wherein a sealing mechanism is connected to the supporting mechanism, wherein the sealing mechanism is used for sealing the reaction chamber pipe, wherein a simulation mechanism is connected to the sealing mechanism, wherein the simulation mechanism is used for simulating hydraulic fracturing under limited temperature and pressure conditions to transform a shale reservoir, wherein a detection mechanism is connected to the simulation mechanism, wherein the detection mechanism is used for detecting water seepage in the rock, and wherein a centrifugal diffusion mechanism is connected to the simulation mechanism, wherein the centrifugal diffusion mechanism is used for centrifugally diffusing the introduced water; The support mechanism comprises support rods (4) fixedly connected at the four corners of the base plate (1); a sliding plate (3) is slidably connected to the support rods (4); a return spring (2) is clamped between the sliding plate (3) and the base plate (1); the return spring (2) is sleeved on the outer surface of the support rod (4); and an upper mounting plate (10) is fixedly connected to the upper end of the support rod (4); The sealing mechanism comprises a lower rotating disk (22) rotatably connected to the sliding plate (3), a lower sealing disk (88) being fixedly connected to the upper portion of the lower rotating disk (22), the lower sealing disk (88) being inserted into the lower side of the sample storage tube (29) for sealing, an upper rotating disk (11) being rotatably connected to the upper mounting plate (10), an upper sealing disk (89) being fixedly connected to the lower portion of the upper rotating disk (11), the upper sealing disk (89) being inserted into the upper side of the sample storage tube (29) for sealing; The simulation mechanism comprises a four-way valve (17) fixedly connected to the upper rotating disk (11), each channel port of the four-way valve (17) being connected to a communication control valve (19), a high-pressure gas cylinder (20) fixedly connected to the upper rotating disk (11), the high-pressure gas cylinder (20) and the communication control valve (19) at the first channel port of the four-way valve (17) being connected via a gas transmission pipe, a vacuum pump (31) fixedly connected to the upper rotating disk (11), the vacuum pump (31) and the communication control valve (19) at the second channel port of the four-way valve (17) being connected via an exhaust pipe, and a flow control valve (19) at the third channel port of the four-way valve (17) being connected to the communication control valve (19). The flow meter (18) is connected to one end of the flow meter (18), and the other end of the flow meter (18) is also connected to the communication control valve (19). The communication control valve (19) on the fourth channel port of the four-way valve (17) is connected to the connection channel (78). The connection channel (78) is arranged in the upper rotating disk (11), and the connection channel (78) extends to the upper sealing disk (89) and extends to the bottom of the upper sealing disk (89). The upper sealing disk (89) is inserted into the sample storage tube (29). The gold tube (28) is installed in the sample storage tube (29). The sample storage tube (29) is installed in the intelligent temperature control furnace body (56). The outer surface of the intelligent temperature control furnace body (56) is symmetrically and detachably connected. There is a matching fixing frame (69), the matching fixing frame (69) is rotatably connected to the rotating annular frame (68), a threaded tube (83) is threadedly connected through the intelligent temperature control furnace body (56), the threaded tube (83) extends into the sample chamber tube (29), the threaded tube (83) and the matching fixing frame (69) are detachably connected, the connecting control valve (19) is connected to the rotating annular frame (68), the connecting control valve (19) on the upper side is connected to the water injection pump (30) through a water pipe, the water injection pump (30) is fixedly connected to the lower part of the upper mounting plate (10), the sliding plate (3) is provided with an annular cavity (71), and the end wall of the annular cavity (71) is rotatably connected to a rotating A sealing annular frame (72), the rotating sealing annular frame (72) is fixedly connected to the lower rotating disk (22), a water injection channel (73) is processed on the lower rotating disk (22), the water injection channel (73) is communicated with the rotating sealing annular frame (72), the water injection channel (73) extends to the upper part of the lower sealing disk (88), a water inlet channel (90) is provided on the end wall of the annular cavity (71), the water inlet channel (90) is communicated with the communication control valve (19) fixedly mounted on the sliding plate (3), a hydraulic pressure pump (42) is fixedly connected to the bottom plate (1), the hydraulic pressure pump (42) is connected to the communication control valve (19) on the first channel port of the three-way valve (32),Each channel opening on the three-way valve (32) is fixedly connected to the communication control valve (19); The auxiliary feeding mechanism comprises a vertical plate (6) symmetrically fixedly connected to the bottom plate (1); a limiting slide bar (81) is fixedly connected between the end walls of the vertical plate (6); an auxiliary slider (51) is slidably connected to the limiting slide bar (81); the auxiliary slider (51) is slidably connected to the vertical plate (6); a stabilizing spring (82) is clamped between the auxiliary slider (51) and the bottom wall of the vertical plate (6); the stabilizing spring (82) is sleeved on the outer surface of the limiting slide bar (81); an auxiliary box (8) is fixedly connected to the end wall of the auxiliary slider (51); a stabilizing ring (21) is fixedly connected to the end wall of the auxiliary box (8); the stabilizing ring (21) is slidably connected to the vertical plate (6); an auxiliary gear chamber (80) is provided in the auxiliary box (8); an auxiliary driving gear shaft (53) is rotatably connected between the end walls of the auxiliary gear chamber (80); the auxiliary driving gear shaft (53) is rotatably connected to the auxiliary driving gear shaft (53 ... The gear shaft (53) is connected to the auxiliary motor power output shaft fixedly installed in the auxiliary box (8); the auxiliary driving gear shaft (53) is fixedly installed on the outer surface of the auxiliary driving gear shaft (53); the auxiliary driving gear shaft (53) meshes with the auxiliary driven gear (50); the auxiliary driven gear (50) is fixedly installed on the outer surface of the auxiliary rotating shaft (43); the auxiliary rotating shaft (43) is rotatably installed on the end wall of the auxiliary gear cavity (80); the end of the auxiliary rotating shaft (43) is fixedly connected to a vibration cylinder (7); a brake electric push rod (49) for pushing a brake tooth (48) is fixed on the end wall of the auxiliary gear cavity (80); the brake tooth (48) is fixedly installed at the end of the brake electric push rod (49); the brake electric push rod (49) pushes the brake tooth (48) to mesh with the auxiliary driven gear (50) to brake the auxiliary rotating shaft (43); The detection mechanism comprises an L-shaped mounting plate (12) fixedly connected to the upper part of the upper rotating disk (11); a detection screw rod (13) is rotatably connected to the L-shaped mounting plate (12); the detection screw rod (13) is connected to a lifting motor fixedly mounted on the upper rotating disk (11); a detection nut plate (14) is threadedly connected to the outer surface of the detection screw rod (13); a detection gear cavity (74) is provided in the detection nut plate (14); a detection driving gear shaft (76) is rotatably connected between the end walls of the detection gear cavity (74); The detection driving gear shaft (76) is connected to the driving motor fixedly installed in the detection nut plate (14) by power; the outer surface of the detection driving gear shaft (76) is fixedly connected with a detection driving gear (77); the detection driving gear (77) is meshed with a detection driven gear (75); the detection driven gear (75) is fixedly installed on the outer surface of the detection drill rod (16); the detection drill rod (16) is hollow inside; the detection drill rod (16) is rotatably installed between the end walls of the detection gear cavity (74); the detection drill rod ( The upper end of the detection drill rod (16) extends into a collection box (15), the collection box (15) is fixedly mounted on the upper part of the detection nut plate (14), the detection drill rod (16) is rotatably connected to an extraction pump (59) fixedly mounted in the collection box (15) for extracting rock powder generated by drilling, a plurality of detection sensors (54) for detecting water penetration in rocks are evenly and evenly fixedly mounted on the outer surface of the detection drill rod (16), a drill bit (57) is fixedly connected to the lower end of the detection drill rod (16), and the upper rotating disk ( A detection channel through which the drill bit (57) and the detection drill rod (16) pass is machined on the drill bit (57), a sealing ring (55) made of a flexible material is fixedly installed between the end walls of the detection channel, and the sealing ring (55) is used to form a seal between the detection drill rod (16), and the detection channel extends to the bottom wall of the upper sealing disk (89), and a through hole (58) for facilitating powder extraction is machined on the detection drill rod (16) above the drill bit (57), and the through hole (58) is connected to the inside of the detection drill rod (16).

2. The device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure according to claim 1, characterized in that: The vibration diffusion mechanism comprises a vibration gear cavity (79) provided in the vibration cylinder (7), a vibration shaft (37) being rotatably connected between the end walls of the vibration gear cavity (79), a sliding sleeve (47) being slidably connected to the outer surface of the vibration shaft (37), a lifting plate (44) being rotatably connected to the sliding sleeve (47), one end of a lifting electric push rod (45) being fixedly connected to the upper part of the lifting plate (44), and the other end of the lifting electric push rod (45) being connected to the upper end wall of the vibration gear cavity (79). The sliding sleeve (47) is fixedly connected to the outer surface of the sliding sleeve (47), the large gear (34) is meshed with the vibrating annular rack (36), the vibrating annular rack (36) is rotatably connected to the end wall of the vibrating gear cavity (79), the vibrating annular rack (36) is fixedly mounted on the outer surface of the intelligent temperature control furnace body (56) driving the vibrating annular rack (36) to rotate, the intelligent temperature control furnace body (56) is rotatably connected to the vibrating cylinder ( ... and the large gear (34) is meshed with the vibrating annular rack (36). ) is fixedly connected to the outer surface of the sliding sleeve (47) at the upper part thereof, the pinion (35) is meshed with the idler wheel (46), the idler wheel (46) is fixedly mounted at the lower end of the idler wheel shaft (67), the idler wheel shaft (67) is rotatably mounted at the lower part of the lifting plate (44), the idler wheel (46) is meshed with the vibration annular rack (36), the vibration shaft (37) extends into the vibration cylinder (7) at the lower side of the vibration gear cavity (79), and the outer surface of the vibration slide rod (39) is A plurality of vibration fixing rods (38) are fixedly connected to the surface at uniform intervals, a vibration slide rod (39) is slidably connected inside the vibration fixing rod (38), a vibration spring (84) is connected to the vibration slide rod (39) and the vibration fixing rod (38), a hemispherical mounting frame (85) is fixedly connected to the end of the vibration slide rod (39), a spherical block (86) is universally rotatably connected to the hemispherical mounting frame (85), and the spherical block (86) performs knocking vibration on the surface of the intelligent temperature control furnace body (56).

3. The device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure according to claim 2, characterized in that: The tightening mechanism comprises a lower groove block (40) fixedly connected to the base plate (1), one end of a lower connecting rod (24) being symmetrically hinged on the lower groove block (40), the other end of the lower connecting rod (24) being hinged to a tightening nut block (23), one end of an upper connecting rod (25) being hinged on the tightening nut block (23), the other end of the upper connecting rod (25) being hinged to an upper groove block (27), the upper groove block (27) being fixedly mounted on the lower part of a circular disk (70), the circular disk (70) being rotatably connected to the lower part of the lower rotating disk (22), the tightening nut block (23) being threadedly connected to a tightening screw rod (26) for driving the tightening nut block (23), the end of the tightening screw rod (26) being fixedly connected to a hand wheel (91) for driving the tightening screw rod (26) to rotate.

4. The device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure according to claim 3, characterized in that: The centrifugal diffusion mechanism comprises a centrifugal gear shaft (41) rotatably connected to the sliding plate (3), the centrifugal gear shaft (41) being dynamically connected to a centrifugal motor for driving the centrifugal gear shaft (41) to rotate, the centrifugal motor being fixedly mounted in the sliding plate (3), a centrifugal gear (33) being fixedly connected to the upper end of the centrifugal gear shaft (41), the centrifugal gear (33) being meshed with a centrifugal annular rack (5) fixedly mounted on the outer side of the lower rotating disk (22).

5. The device for simulating hydraulic fracturing to transform shale reservoirs under limited temperature and pressure according to claim 4, characterized in that: The intelligent temperature control furnace body (56) is connected to a clamping mechanism, and the clamping mechanism includes a fixing ring (9) symmetrically and detachably connected to the intelligent temperature control furnace body (56), a clamping driving gear shaft (60) is rotatably connected inside the fixing ring (9), the clamping driving gear shaft (60) is connected to the clamping motor for driving the clamping driving gear shaft (60), the clamping motor is fixedly installed in the fixing ring (9), a clamping driving gear (61) is fixedly connected to the end of the clamping driving gear shaft (60), the clamping driving gear (61) is meshed with a surface of one side of a clamping annular rack (62), the clamping annular rack (62) is rotatably installed in the fixing ring (9), and the clamping driving gear shaft (60) is connected to the clamping driving gear shaft (61). The other side surface of the clamping annular rack (62) is meshed with a plurality of clamping driven gears (66), and the clamping driven gears (66) are fixedly mounted on the outer surface of the clamping screw (65), and the clamping screw (65) is rotatably connected in the fixing ring (9), and the outer surface of the clamping screw (65) is threadedly connected with a clamping thread sleeve (64), and the clamping screw (65) pushes the clamping thread sleeve (64) to move, and the clamping thread sleeve (64) is slidably connected to the fixing ring (9), and the end of the clamping thread sleeve (64) is fixedly connected with a clamping arc plate (63), and the clamping arc plate (63) clamps the sample storage tube (29).

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