Experimental device for sedimentary rock penetration test and use method

Abstract

The invention relates to the technical field of petroleum geology research, in particular to an experimental device for sedimentary rock penetration test and a use method. The penetration tester comprises a base, a tank body, a permeable cylinder and a simulation block; water injection ports are formed in the bottom, top and side wall of the tank body; connecting the water filling nozzle and the measuring assembly according to the water flow permeation direction; the water permeable cylinder is a cylindrical cylinder and is mounted in the tank body; the simulation block is placed in the water-permeable cylinder, inner through holes are uniformly distributed in the side wall of the water-permeable cylinder, a plurality of parallel limiting rings are arranged outside the water-permeable cylinder from top to bottom, an adjusting ring rotating relative to the water-permeable cylinder is arranged between every two adjacent upper and lower limiting rings, and a circle of outer through holes are annularly and uniformly formed in each adjusting ring. Simulation blocks in different shapes are arranged in the penetration tester to simulate sedimentary rock sample structures in different accumulation shapes, and meanwhile, the position of the adjusting ring is adjusted according to the accumulation shapes and the water flow penetration direction, so that closing of the inner through hole and the outer through hole is controlled, and a penetration environment matched with the inner through hole and the outer through hole is created.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum geological research, in particular to an experimental device for sedimentary rock permeability testing and a use method thereof. Background Art

[0002] Sedimentary rock is one of the three main rocks that make up the Earth's lithosphere. On the Earth's surface, 70% of the rocks are sedimentary rocks, which mainly include limestone, sandstone, shale, etc. Under the influence of construction, resource mining and other projects, the original sedimentary rock structure is destroyed, and its permeability will change after re-depositing. The permeability parameters of the sedimentary rock structure after crushing and re-depositing will affect the safety of the project. Therefore, it is necessary to simulate the permeability characteristics of the crushed sedimentary rock particles under specific circumstances in the laboratory through rock crushing and permeability tests.

[0003] For experiments of different projects, when constructing sedimentary rock permeability experiments, the sedimentary rock sample models currently constructed conventionally, due to the limitations of experimental conditions, generally focus more on the control of experimental conditions such as the proportion of limestone, sandstone, shale and soil in the above-mentioned sedimentary rock sample particles, particle size, and water penetration direction.

[0004] It is difficult to simulate and restore the different accumulation shapes of sedimentary rocks that are re-accumulated after being broken. Even if it takes time to construct sedimentary rock sample models with different accumulation shapes, due to their irregular shapes, the existing infiltration experimental equipment cannot set up a matching infiltration environment according to their irregular shapes.

[0005] Therefore, in view of the above-mentioned defects, there is an urgent need for an experimental device and a method for using sedimentary rock permeability testing to simulate the structure of sedimentary rock samples with different accumulation shapes, and at the same time adjust the permeability environment suitable for the sedimentary rock according to the accumulation shape of the sedimentary rock. Summary of the invention

[0006] In order to avoid the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide an experimental device for sedimentary rock permeability testing, which can be configured with the particle ratios of different rock samples after the sedimentary rock is crushed, and can simulate the structure of sedimentary rock samples with different stacking shapes, and at the same time can adjust the permeability environment suitable for it according to the stacking shape of the sedimentary rock.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an experimental device for sedimentary rock permeability test, comprising a permeability tester and a measuring assembly; the permeability tester comprises a base, a tank body, a water-permeable cylinder, a sealing top plate and a simulation block; the tank body is installed on the base, the bottom of the tank body is provided with a bottom water injection port, and the side wall is provided with a water injection port; the sealing top plate is tightly installed on the top of the tank body, and the sealing top plate is provided with a top water injection port and an exhaust port; the water injection port, the top water injection port and the bottom water injection port are connected to the measuring assembly through a hose;

[0008] The water-permeable cylinder is in the shape of a cylindrical cylinder and is installed inside the tank body. A water-permeable port is arranged at the bottom of the water-permeable cylinder and its position is adapted to the position of the bottom water filling port. The simulation block is placed inside the water-permeable cylinder. The side wall of the water-permeable cylinder is evenly covered with inner through holes. A plurality of parallel limiting rings are arranged on the outside of the water-permeable cylinder from top to bottom to avoid the inner through holes. The limiting ring is fixed to the water-permeable cylinder as a whole. An adjustment ring that rotates relative to the water-permeable barrel is arranged between adjacent upper and lower limiting rings, and a circle of outer through holes is evenly arranged in an annular shape on the adjustment ring.

[0009] The present invention is further configured such that a slide groove is provided on the limit ring, the adjustment ring is slidably installed in the slide groove, and the adjustment ring is slidably rotated to achieve alignment or misalignment of the outer through hole and the inner through hole.

[0010] The present invention is further configured such that the inner diameter of the adjustment ring matches the outer diameter of the water-permeable cylinder, and the adjustment ring is equipped with a plug capable of blocking the outer through hole.

[0011] The present invention is further configured such that a circle of water injection outlets are distributed around the side wall of the tank body, and an annular water pipe is installed on the periphery of the tank body. The water injection outlets distributed around the side wall of the tank body are connected to the annular water pipe, and a water injection port is arranged on the annular water pipe. The bottom water injection port, the top water injection port and the water injection port on the annular water pipe are respectively equipped with a switch valve.

[0012] The present invention is further configured such that a mounting plate is provided on the top of the water-permeable cylinder, the mounting plate is provided on the top edge of the tank body, the sealing top plate is installed on the tank body, and the mounting plate is pressed between the sealing top plate and the tank body.

[0013] The present invention is further configured as follows: the base includes an upper support plate and a lower support plate, the upper support plate and the lower support plate are fixedly connected by a lower support rod, the tank body is mounted on the upper support plate, and the upper support plate is provided with a plurality of upper support rods on the periphery of the tank body, the sealing top plate can be fixedly connected to the upper support rods by bolts, and the area between the upper support plate and the lower support plate is used to accommodate a hose connected to the bottom water inlet.

[0014] The present invention is further configured such that the shape of the simulation block is designed according to experimental requirements and is obtained by 3D printing.

[0015] The present invention is further configured such that the measuring assembly includes a water injection mechanism and a measuring tube, the water injection mechanism includes a water injection tank and an adjusting mechanism, and the adjusting mechanism is used to adjust the height position of the water injection tank.

[0016] The present invention is further configured such that the adjustment mechanism comprises an adjustment seat, a screw and a slide plate, wherein a long strip-shaped groove is arranged in the middle of the adjustment seat along the length direction, the screw is arranged in the groove, and the top and bottom ends of the screw are rotatably connected to the adjustment seat;

[0017] A rotating hand wheel is installed at the bottom end of the screw rod, an adjusting block is installed on the screw rod, the slide plate is fixedly connected to the adjusting block, and the water injection tank is fixedly installed on the slide plate. The slide plate can be adjusted by rotating the rotating hand wheel so that the slide plate moves up and down along the screw rod.

[0018] The present invention is further configured such that the slide plate is slidably mounted on the adjustment seat, and locking bolts are respectively arranged on both sides of the slide plate. The slide plate can be locked by screwing the locking bolts.

[0019] The present invention is further configured such that a scale is provided on the adjustment seat.

[0020] The present invention is further configured such that the measuring tube is a transparent tube, a scale is marked on the measuring tube, and a water inlet and a switch valve are arranged at the bottom of the measuring tube.

[0021] The present invention is further configured that the experimental device for sedimentary rock permeability testing also includes a test bench, a crusher, a screening machine and a material rack;

[0022] Among them, a crusher, a screening machine, a material rack and the penetration tester are placed in sequence on the desktop of the experimental bench, and an expansion board is provided on the side of the experimental bench close to the penetration tester, and the measuring component is installed on the expansion board.

[0023] The present invention is further configured such that the screening machine comprises a vibrating frame and a plurality of sieve plates, wherein the sieve plates are stacked and mounted on the vibrating frame, and the bottom surface of each sieve plate is covered with sieve holes, and the diameter of the sieve holes of the sieve plates gradually decreases from top to bottom.

[0024] The present invention is further configured such that a mounting lock is provided on the side of the sieve plate, and the sieve plates stacked up and down are connected to each other through the lock.

[0025] The present invention is further configured such that the vibration frame is tilted, and a motor drive is arranged at the bottom of the vibration frame to drive the vibration frame to vibrate.

[0026] A method for using an experimental device for sedimentary rock penetration testing is applicable to the above-mentioned experimental device for sedimentary rock penetration testing, comprising the following steps:

[0027] S1: crushing sedimentary rocks using crushers;

[0028] S2: Use a screening machine to screen the crushed sedimentary rocks, and classify the sedimentary rock particles of different sizes and types and place them on the material rack. When the experiment is conducted, the sedimentary rock proportions required for different experiments are used;

[0029] S3: 3D print simulation blocks according to experimental requirements;

[0030] S4: placing the simulation block in a water-permeable cylinder, and piling the broken sedimentary rock particles on the simulation block so that the simulation block is molded into a corresponding shape to be simulated;

[0031] S5: According to the water flow penetration direction, rotate the adjustment ring or install the plug to control the closing of the inner and outer holes of the water-permeable barrel; at the same time, connect the water injection tank and the measuring tube according to the water flow penetration direction;

[0032] S6: Start water injection for permeation experiment.

[0033] The present invention is further configured that step S5 specifically includes: when the water flow infiltration direction is from below the sedimentary rock, the outer through hole and the inner through hole are staggered and closed by rotating the adjustment ring, the bottom water injection port is connected to the water injection tank, and the top water injection port is connected to the measuring pipe;

[0034] When the water flow infiltration direction is from above the sedimentary rock, the outer through hole and the inner through hole are displaced and closed by rotating the adjusting ring, the bottom water injection port is connected to the measuring tube, and the top water injection port is connected to the water injection tank;

[0035] When the water flow penetration direction is circumferential penetration, the adjustment circle is adjusted according to the accumulation shape of the sedimentary rock particles, the outer through holes of the adjustment circle where the sedimentary rock particles are located are aligned with the inner through holes, and some of the outer through holes are blocked with plugs, so that the outer through holes at the positions corresponding to the sedimentary rock particles are opened, and the outer through holes at other positions without sedimentary rock particles are closed; and the water injection port on the annular water pipe is connected to the water injection trough, and the top water injection port and the bottom water injection port are connected to the measuring tube.

[0036] In summary, the beneficial effects of the above technical solution of the present invention are as follows:

[0037] 1. The penetration tester of the present invention is provided with simulation blocks of different shapes, which can simulate sedimentary rock sample structures of different accumulation shapes. At the same time, the position of the adjustment circle and the connection relationship of each water injection port can be adjusted according to the accumulation shape of the sedimentary rock and the direction of water flow penetration, and the closure of the inner through hole and the outer through hole can be controlled to create a penetration environment suitable for it.

[0038] 2. The regulating mechanism provided in the present invention can adjust the height of the water injection tank to adapt to the hydraulic gradient of the infiltration experiment.

[0039] 3. The screening machine described in the present invention is provided with multi-layer sieve plates with different apertures, and sedimentary rock particles of different particle sizes and types are classified and placed on the material rack. When experiments are conducted, the sedimentary rock proportions required for different experiments are selected for use, which is convenient for configuring the particle proportions of different rock samples after the sedimentary rocks are crushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0042] Figure 2 It is an axonometric view of the penetration tester of the present invention.

[0043] Figure 3 It is a schematic diagram of the bottom three-dimensional structure of the penetration tester of the present invention.

[0044] Figure 4 This is a schematic diagram of the three-dimensional structure of the penetration tester of the present invention after removing the sealing top plate.

[0045] Figure 5 It is a schematic diagram of the internal structure of the penetration tester of the present invention.

[0046] Figure 6 It is an exploded diagram of the penetration tester of the present invention.

[0047] Figure 7 It is a schematic structural diagram of the water-permeable cylinder of the present invention.

[0048] Figure 8 It is a schematic diagram of the internal structure of the water-permeable cylinder of the present invention.

[0049] Fig. 9 It is a schematic diagram of the structure of the expansion board of the present invention.

[0050] Fig.10 It is a structural schematic diagram of the water injection mechanism of the present invention.

[0051] Fig.11 It is a structural schematic diagram of the regulating mechanism of the present invention.

[0052] Fig.12 This is a schematic diagram of the structure of the adjustment mechanism of the present invention after the slide plate is removed.

[0053] Fig.13 It is a schematic diagram of the structure of the measuring tube of the present invention.

[0054] Fig.14 It is a schematic diagram of the three-dimensional structure of the screening machine of the present invention.

[0055] Fig.15 It is a front structural schematic diagram of the screening machine of the present invention.

[0056] Fig.16 The present invention is a flowchart of a method for using an experimental device for sedimentary rock permeability testing.

[0057] In the accompanying drawings, the meanings of the symbols are as follows:

[0058] 1. Experimental table; 11. Expansion board; 2. Crusher; 3. Screening machine; 31. Vibrating frame; 32. Screen plate; 321. Screen hole; 322. Lock; 4. Material rack; 5. Penetration tester; 51. Base; 511. Upper support plate; 512. Lower support plate; 513. Upper support rod; 514. Lower support rod; 52. Tank; 521. Annular water pipe; 53. Water-permeable cylinder; 531. Inner through hole; 5311. Water-permeable port; 532. Limiting ring; 533. Adjusting ring ; 5331, external through hole; 534, mounting plate; 54, sealing top plate; 5411, top water inlet; 5412, water inlet, 5413, bottom water inlet, 542, exhaust port; 55, simulation block; 6, water injection mechanism; 61, water injection groove; 62, adjustment mechanism; 621, adjustment seat; 6211, groove; 622, screw; 6221, rotating handwheel; 623, slide plate; 6231, adjustment block; 6232, locking bolt; 7, measuring tube, 71, water inlet. DETAILED DESCRIPTION

[0059] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in the field without making any creative work should all fall within the scope of protection of the present invention.

[0060] In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0061] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0062] Embodiment 1:

[0063] like Figure 1As shown in the figure, it is a preferred embodiment of the present invention, an experimental device for sedimentary rock permeability test, comprising: a test bench 1, a crusher 2, a sieving machine 3, a material rack 4 and a permeability tester 5. The crusher 2, the sieving machine 3, the material rack 4 and the permeability tester 5 are placed on the table of the test bench 1 in sequence, and an expansion board 11 is provided on one side of the test bench 1 close to the permeability tester 5, and a test assembly is installed on the expansion board 11. The test assembly includes a water injection mechanism 6 and a plurality of measuring tubes 7, such as Fig. 9 shown.

[0064] like Figure 2-Figure 8 As shown, the penetration tester 5 includes a base 51, a tank body 52, a water-permeable barrel 53, a sealing top plate 54 and a simulation block 55. The tank body 52 is installed on the base 51, and the sealing top plate 54 can be tightly installed on the top of the tank body 52. ​​The bottom of the tank body 52 is provided with a bottom water inlet 5413, and the side wall is provided with a water inlet 5412. At the same time, the sealing top plate 53 is provided with a top water inlet 5411 and an exhaust port 542. The water inlet 5412, the top water inlet 5411 and the bottom water inlet 5413 are connected to the measuring component through a hose; wherein, the water-permeable barrel 53 is detachable from the tank body 52.

[0065] like Figure 2-Figure 3 As shown, a circle of water injection outlets are distributed around the side wall of the tank body 52, and an annular water pipe 521 is installed on the periphery of the tank body 52. ​​The water injection outlets distributed around the side wall of the tank body 52 are connected to the annular water pipe 521, and the annular water pipe 521 is also provided with a water injection port 5412. The bottom water injection port 5413 at the bottom of the tank body 52, the top water injection port 5411 on the sealing top plate 54, and the water injection port 5412 on the annular water pipe 521 are equipped with switch valves.

[0066] like Figure 4-Figure 8 As shown, the water-permeable cylinder 53 is in the shape of a cylindrical cylinder and is installed inside the tank body 52. ​​A water-permeable port 5311 is arranged at the bottom of the water-permeable cylinder 53 and is aligned with the water injection port 541 at the bottom of the tank body 52. ​​The simulation block 55 is placed in the water-permeable cylinder 53. The side wall of the water-permeable cylinder 53 is evenly covered with inner through holes 531. The outside of the water-permeable cylinder 53 is provided with a plurality of parallel limiting rings 532 from top to bottom to avoid the inner through holes 531. The limiting rings 532 are fixed to the water-permeable cylinder 53. The adjusting ring 533 is installed between the upper and lower limiting rings 532, and a circle of outer through holes 5331 are evenly arranged in an annular shape on the adjusting ring 533, and the outer through holes 5331 on each adjusting ring 533 correspond to a row of inner through holes 531, and a sliding groove is provided on the limiting ring 532, and the adjusting ring 533 is slidably installed in the sliding groove, and the adjusting ring 533 is rotatable, and the outer through holes 5331 and the inner through holes 531 can be aligned or misaligned by rotating the adjusting ring 533.

[0067] like Figure 5 As shown, when in use, a simulation block 55 is obtained by 3D printing according to experimental needs, and then the simulation block 55 is placed in the water-permeable cylinder 53. After that, the experimenter accumulates the broken sedimentary rock particles on the simulation block 55, and the accumulation shape of the sedimentary rock particles is shaped into a corresponding shape to be simulated by the simulation block 55. It should be noted that when printing the simulation block 55, a through groove corresponding to the position of the water-permeable port 5311 needs to be reserved.

[0068] In this embodiment, the infiltration direction of the water flow is from the bottom of the sedimentary rock. The rotating adjustment ring 533 will offset and close the outer through hole 5331 and the inner through hole 531, and at the same time, the switch valve of the water injection port 5412 on the annular water pipe 521 will be closed, and the bottom water injection port 5413 at the bottom of the tank body 52 is connected to the water injection groove 61, and the top water injection port 5411 on the sealing top plate 54 is connected to the measuring tube 7. In this way, the water injection groove 61 will inject water into the bottom of the permeable cylinder 53, and the infiltrated water will flow to the measuring tube 7, which is convenient for people to observe and measure.

[0069] like Fig.10 As shown, the water injection mechanism 6 is composed of a water injection tank 61 and an adjustment mechanism 62. Fig.11 As shown, the adjustment mechanism 62 is composed of an adjustment seat 621, a screw rod 622 and a slide plate 623. A long groove 6211 is set in the middle of the adjustment seat 621 along its own direction. The screw rod 622 is installed in the groove 6211, and the top and bottom ends of the screw rod 622 are rotatably connected to the adjustment seat 621. At the same time, a rotating hand wheel 6221 is installed at the bottom end of the screw rod 622.

[0070] like Fig.12 As shown, an adjusting block 6231 is installed on the screw rod 622, and the slide plate 623 is fixedly connected to the adjusting block 6231. At the same time, the slide plate 623 is slidably installed on the adjusting seat 621. The slide plate 623 can be adjusted by rotating the rotating hand wheel 6221 so that the slide plate 623 moves up and down along the screw rod 622, and the water injection groove 61 is fixedly installed on the slide plate 623.

[0071] When adjusting the height of the water filling groove 61, the rotating hand wheel 6221 can be turned to rotate the screw 622, thereby driving the slide plate 623 and the adjustment block 6231 on the screw 622 to move up and down. After adjusting the height of the water filling groove 61, the locking bolt 6232 can be tightened to lock the slide plate 623, so as to prevent the rotating hand wheel 6221 from accidentally rotating and causing the slide plate 623 to move.

[0072] like Fig.13 As shown, the measuring tube 7 is a transparent tube, one side of the measuring tube 7 is marked with scale, and the bottom of the measuring tube 7 is provided with a water inlet 71 and a switch valve.

[0073] like Figure 1 , Figure 14-15 As shown, the crusher 2 is used to crush sedimentary rocks, such as limestone, sandstone, shale and other sedimentary rocks, and then screen the crushed gravel. The screening machine 3 includes a vibrating frame 31 and a plurality of sieve plates 32. The sieve plates 32 are stacked and installed on the vibrating frame 31, and the bottom surface of each sieve plate 32 is covered with sieve holes 321. The diameter of the sieve holes 321 of these sieve plates 32 gradually decreases from top to bottom, and the sieve holes 321 of the sieve plate 32 located at the bottom are always smaller than the sieve holes 321 of the sieve plate 32 above itself. The side of the sieve plate 32 is installed with a lock 322, and the sieve plates 32 stacked up and down can be connected to each other through the lock 322.

[0074] The crushed stones are poured into the uppermost sieve plate 32, and then the sieve plate 32 is vibrated and screened by the vibrating frame 31. Sedimentary rock particles of different sizes are finally retained in different sieve plates 32. Sedimentary rock particles of different sizes and types are classified and placed on the material rack 4, and are taken out according to the sedimentary rock proportions required for different experiments during the experiment.

[0075] Embodiment 2:

[0076] An experimental device for sedimentary rock permeability testing. The difference between this embodiment and embodiment 1 is that in this embodiment, the sedimentary rock accumulation shape is sandwich type, and the water flow penetration direction is circumferential penetration.

[0077] In this embodiment, two simulation blocks 55 can be printed, one simulation block 55 is placed at the bottom of the permeable cylinder 53, and then crushed sedimentary rock particles are put in, and then another simulation block 55 is placed on top of the sedimentary rock particles to allow the sedimentary rock particles to form a sandwich structure. The stacking shape of the sedimentary rock particles is determined by the shapes of the simulation blocks 55 on the upper and lower sides.

[0078] The adjustment ring 533 is equipped with a plug that can block the outer through hole 5331. The water flow penetration direction of the experiment is circumferential. The adjustment ring 533 is adjusted according to the shape of the sedimentary rock particles. The outer through hole 5331 of the adjustment ring 533 where the sedimentary rock particles are located is aligned with the inner through hole 531. Since the sedimentary rock particles are deposited in an irregular shape, after alignment, some of the outer through holes 5331 can be blocked with the plug, so that the outer through holes 5331 at the positions corresponding to the sedimentary rock particles are opened, and the outer through holes 5331 at other positions without sedimentary rock particles are closed. Then, the water injection port 5412 on the annular water pipe 521 is opened, and the water injection port 5412 on the annular water pipe 521 is connected to the water injection tank 61. The top water injection port 5411 on the sealed top plate 54 and the bottom water injection port 5413 at the bottom of the tank body 52 are connected to the measuring tube 7.

[0079] Embodiment 3:

[0080] like Figure 1 , 16As shown in the figure, a preferred embodiment of the present invention is a method for using an experimental device for sedimentary rock permeability testing, comprising the following steps:

[0081] S1: crushing the sedimentary rock using crusher 2.

[0082] S2: Use the screening machine 3 to screen the crushed sedimentary rock, and classify the sedimentary rock particles of different particle sizes and different types and place them on the material rack 4, and then take them according to the sedimentary rock proportions required by different experiments when experiments are conducted.

[0083] S3: According to experimental requirements, 3D print the simulation block 55.

[0084] S4: placing the simulation block 55 in the water-permeable cylinder 53, and piling the crushed sedimentary rock particles on the simulation block 55 so that the simulation block 55 can shape the particles into a corresponding shape to be simulated.

[0085] S5: According to the water flow penetration direction, rotate the adjustment ring 533 or install the plug to control the closing of the inner through hole 531 and the outer through hole 5331 of the water permeable barrel; at the same time, connect the water injection tank 61 and the measuring tube 7 according to the water flow penetration direction.

[0086] When the water flow infiltrates from below the sedimentary rock, the adjusting ring 533 is rotated to close the outer through hole 5331 and the inner through hole 531, the bottom water injection port 5413 is connected to the water injection tank 61, and the top water injection port 5411 is connected to the measuring tube 7;

[0087] When the water flow infiltrates from above the sedimentary rock, the adjusting ring 533 is rotated to close the outer through hole 5331 and the inner through hole 531, the bottom water injection port 5413 is connected to the measuring tube 7, and the top water injection port 5411 is connected to the water injection tank 61;

[0088] When the water flow penetration direction is circumferential penetration, the adjustment circle 533 is adjusted according to the accumulation shape of the sedimentary rock particles, the outer through hole 5331 of the adjustment circle 533 at the position where the sedimentary rock particles are located is aligned with the inner through hole 531, and part of the outer through hole 5331 is blocked with a plug, so that the outer through hole 5331 at the position corresponding to the sedimentary rock particles is opened, and the outer through holes 5331 at other positions where there are no sedimentary rock particles are closed; and the water injection port 5412 on the annular water pipe 521 is connected to the water injection tank 61, and the top water injection port 5411 and the bottom water injection port 5413 are connected to the measuring tube 7.

[0089] S6: Start water injection for permeation experiment.

[0090] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An experimental device for sedimentary rock permeability testing, comprising a permeability tester and a measuring assembly; It is characterized in that The penetration tester comprises a base, a tank body, a water-permeable cylinder, a sealing top plate and a simulation block; the tank body is mounted on the base, a bottom water inlet is provided at the bottom of the tank body, and a water inlet is provided on the side wall; the sealing top plate is tightly mounted on the top of the tank body, and a top water inlet and an exhaust port are provided on the sealing top plate; the water inlet, the top water inlet and the bottom water inlet are connected to the measuring assembly through a hose; The water-permeable cylinder is a cylindrical cylinder installed inside the tank body; a water-permeable port is arranged at the bottom of the water-permeable cylinder, and the position of the water-permeable port is adapted to the position of the bottom water filling port; the simulation block is placed inside the water-permeable cylinder, and the side wall of the water-permeable cylinder is evenly covered with internal through holes; a plurality of parallel limiting rings are arranged on the outside of the water-permeable cylinder from top to bottom, and the limiting rings are fixed to the water-permeable cylinder as a whole; an adjustment ring that rotates relative to the water-permeable barrel is arranged between adjacent upper and lower limiting rings, and a circle of outer through holes is evenly arranged in an annular shape on the adjustment ring.

2. An experimental device for sedimentary rock permeability testing according to claim 1, It is characterized in that The limiting ring is provided with a slide groove, and the adjusting ring is slidably installed in the slide groove. The adjusting ring is slidably rotated to achieve alignment or misalignment of the outer through hole and the inner through hole.

3. An experimental device for sedimentary rock permeability testing according to claim 2, It is characterized in that The inner diameter of the adjustment ring matches the outer diameter of the water-permeable cylinder, and the adjustment ring is equipped with a plug capable of plugging the outer through hole.

4. An experimental device for sedimentary rock permeability testing according to claim 3, It is characterized in that A circle of water injection outlets is distributed around the side wall of the tank body, and an annular water pipe is installed on the periphery of the tank body. The water injection outlets distributed around the side wall of the tank body are connected to the annular water pipe. A water injection port is arranged on the annular water pipe, and the bottom water injection port, the top water injection port and the water injection port on the annular water pipe are respectively equipped with switch valves.

5. An experimental device for sedimentary rock permeability testing according to claim 4, It is characterized in that A mounting plate is arranged on the top of the water-permeable cylinder, and the mounting plate is arranged on the top edge of the tank body. The sealing top plate is mounted on the tank body, and the mounting plate is pressed between the sealing top plate and the tank body.

6. An experimental device for sedimentary rock permeability testing according to claim 5, It is characterized in that The base includes an upper support plate and a lower support plate, the upper support plate and the lower support plate are fixedly connected by a lower support rod, the upper support plate is provided with a plurality of upper support rods, the tank body is mounted on the upper support plate, and the sealing top plate is fixedly connected to the upper support rods by bolts.

7. The experimental device for sedimentary rock permeability testing according to claim 1, It is characterized in that The shape of the simulation block is designed according to experimental requirements and is obtained by 3D printing.

8. An experimental device for sedimentary rock permeability testing according to claim 1, It is characterized in that The measuring assembly comprises a water injection mechanism and a measuring tube. The water injection mechanism comprises a water injection slot and an adjusting mechanism. The adjusting mechanism is used to adjust the height position of the water injection slot.

9. An experimental device for sedimentary rock permeability testing according to claim 8, It is characterized in that The adjustment mechanism comprises an adjustment seat, a screw and a slide plate, wherein a long strip-shaped groove is arranged in the middle of the adjustment seat along the length direction, the screw is arranged in the groove, and the top and bottom ends of the screw are rotatably connected to the adjustment seat; A rotating hand wheel is installed at the bottom end of the screw rod, an adjusting block is installed on the screw rod, the slide plate is fixedly connected to the adjusting block, and the water injection tank is fixedly installed on the slide plate.

10. An experimental device for sedimentary rock permeability testing according to claim 9, It is characterized in that The slide plate is slidably mounted on the adjustment seat, and locking bolts are respectively arranged on both sides of the slide plate.

11. An experimental device for sedimentary rock permeability testing according to claim 10, It is characterized in that A scale is arranged on the adjusting seat.

12. An experimental device for sedimentary rock permeability testing according to claim 8, It is characterized in that The measuring tube is a transparent tube with scales marked on it, and a water inlet and a switch valve are arranged at the bottom of the measuring tube.

13. The experimental device for sedimentary rock permeability testing according to claim 1, It is characterized in that The experimental device for sedimentary rock permeability test also includes an experimental table, a crusher, a screening machine and a material rack; Among them, a crusher, a screening machine, a material rack and the penetration tester are placed in sequence on the desktop of the experimental bench. The experimental bench is provided with an expansion board on the side close to the penetration tester, and the measuring component is installed on the expansion board.

14. An experimental device for sedimentary rock permeability testing according to claim 13, It is characterized in that The screening machine comprises a vibrating frame and a plurality of sieve plates, wherein the sieve plates are stacked and mounted on the vibrating frame, and the bottom surface of each sieve plate is covered with sieve holes, and the diameter of the sieve holes of the sieve plates gradually decreases from top to bottom.

15. An experimental device for sedimentary rock permeability testing according to claim 14, It is characterized in that The side of the sieve plate is provided with a mounting lock, and the sieve plates stacked up and down are connected to each other through the lock; the vibration frame is arranged obliquely, and a motor drive is arranged at the bottom of the vibration frame.

16. A method for using an experimental device for sedimentary rock penetration testing, applicable to the experimental device for sedimentary rock penetration testing according to any one of claims 1 to 15, It is characterized in that The following steps are involved: S1: crushing sedimentary rocks using crushers; S2: Use a screening machine to screen the crushed sedimentary rocks, and classify the sedimentary rock particles of different sizes and types and place them on the material rack. When the experiment is conducted, the sedimentary rock proportions required for different experiments are used; S3: 3D print simulation blocks according to experimental requirements; S4: placing the simulation block in a water-permeable cylinder, and piling the broken sedimentary rock particles on the simulation block so that the simulation block is molded into a corresponding shape to be simulated; S5: According to the water flow penetration direction, rotate the adjustment ring or install the plug to control the closing of the inner and outer holes of the water-permeable barrel; at the same time, connect the water injection tank and the measuring tube according to the water flow penetration direction; S6: Start water injection for permeation experiment.

17. A method for using the experimental device for sedimentary rock permeability testing according to claim 16, It is characterized in that Step S5 specifically includes: when the water flow infiltration direction is from below the sedimentary rock, the adjusting ring is rotated to close the outer through hole and the inner through hole by dislocation, the bottom water injection port is connected to the water injection tank, and the top water injection port is connected to the measuring tube; When the water flow infiltration direction is from above the sedimentary rock, the outer through hole and the inner through hole are displaced and closed by rotating the adjusting ring, the bottom water injection port is connected to the measuring tube, and the top water injection port is connected to the water injection tank; When the water flow penetration direction is circumferential penetration, the adjustment circle is adjusted according to the accumulation shape of the sedimentary rock particles, the outer through holes of the adjustment circle where the sedimentary rock particles are located are aligned with the inner through holes, and some of the outer through holes are blocked with plugs, so that the outer through holes at the positions corresponding to the sedimentary rock particles are opened, and the outer through holes at other positions without sedimentary rock particles are closed; and the water injection port on the annular water pipe is connected to the water injection trough, and the top water injection port and the bottom water injection port are connected to the measuring tube.

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