Experimental device for simulating macropore crack rock core

Abstract

The utility model relates to the technical field of fractured rock core experiments, and particularly discloses an experimental device for simulating macropore fractured rock cores, which comprises a device frame, a device shell is arranged in the device frame, and an experimental mechanism for carrying out rock core experiments is arranged in the device shell. A limiting mechanism for limiting the device is arranged on the outer wall of the device shell; the experiment mechanism comprises a crack plate, the crack plate is arranged in the device shell, two positioning holes are formed in the lower surface of the crack plate, and limiting rods fixedly connected with the crack plate are connected into the two positioning holes in an inserted mode. The large-hole crack rock can be simulated through the arranged experiment mechanism and the stacked placement of the plurality of crack plates, and the two crack plates can be limited through the positioning holes formed in the crack plates under the cooperation of the limiting rods, so that the displacement condition of the crack plates is effectively reduced, and the simulation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of fracture core testing technology, and in particular to a device for simulating large-pore fracture core testing. Background Technology

[0002] The simulated large-pore fracture core test apparatus is a specialized experimental device designed to simulate large-pore fracture cores. Its structure and function are designed to meet the needs of indoor physical simulation experiments in the petroleum industry. This apparatus is widely used in indoor physical simulation experiments within the petroleum industry. Experiments conducted using this apparatus can provide crucial data support and theoretical basis for chemical water shut-off and profile control processes in oilfield development, contributing to the optimization of construction plans and the improvement of oil recovery rates.

[0003] Existing technologies cannot quantitatively simulate fractures or pore fractures, which greatly limits their application and prevents the development of formation water channeling control technologies in carbonate rock pore fracture formations.

[0004] An existing patent (publication number: CN203148743U) discloses a core experimental device for simulating large-pore fractures. It includes a central tube containing spherical filler and fracture plates, with sealing joints installed at both ends. It is easy to operate and reliable. Technicians can simulate formations with different pore fractures by changing the arrangement of the filler, effectively and accurately evaluating the performance and effect of chemical plugging agents. Furthermore, the chemical water plugging and profile control process and construction parameters can be optimized according to different geological conditions, making it suitable for indoor physical simulation experiments in the petroleum industry.

[0005] To address the aforementioned issues, while existing patents offer solutions that can simulate formations with varying pore sizes and fractures by altering the arrangement of the filler material, thus effectively and accurately evaluating the performance and effectiveness of chemical plugging agents, they present several challenges in practical application. These solutions employ fracture plates for simulation, combining multiple plates to represent different fracture types. However, this approach fails to effectively constrain the multiple fracture plates, leading to easy displacement and alteration of the fracture morphology, ultimately affecting experimental results. Summary of the Invention

[0006] The purpose of this invention is to provide a simulated core test device for large-pore fractures. By stacking multiple fracture plates, it is possible to simulate large-pore fractured rocks. Furthermore, by using positioning holes on the fracture plates and with the assistance of limiting rods, two fracture plates can be limited, thereby effectively reducing the displacement of the fracture plates and improving the simulation effect, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a simulated core test device for large pore fractures, comprising a device frame, an outer shell of the device frame, an experimental mechanism for core testing inside the outer shell, and a limiting mechanism for limiting the device on the outer wall of the outer shell.

[0008] The experimental mechanism includes a crack plate, which is placed inside the outer shell of the device. Two positioning holes are opened on the lower surface of the crack plate, and a limiting rod that is fixedly connected to the crack plate is inserted into the two positioning holes. A protective cover is provided on the top of the crack plate.

[0009] Preferably, the protective cover is fitted with fixing bolts that are threadedly connected to the outer casing of the device.

[0010] Preferably, a sealing ring is fixed on the lower surface of the protective cover, and a sealing groove formed on the outer shell of the device is inserted and connected below the sealing ring.

[0011] Preferably, the upper surface of the protective cover is connected to a delivery pipe that communicates with the outer casing of the device, and the end of the delivery pipe is connected to a delivery pump fixed on the device frame.

[0012] Preferably, the limiting mechanism includes a fixing member, which is sleeved on the outer wall of the device housing, and the outer wall of the fixing member is fitted with fixing screws that abut against and connect with the device housing.

[0013] Preferably, two connectors are fixed to the outer surface of the fastener, and each end of the two connectors is fitted with a limiting bolt that is threadedly connected to the device frame.

[0014] Preferably, a pressure sensor is installed on the outer wall of the device housing, a medium discharge pipe is connected to the lower surface of the device housing, and casters are fixed to the lower surface of the device frame by bolts.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Through the experimental setup, multiple crack plates can be stacked to simulate large-pore cracked rocks. Furthermore, the positioning holes on the crack plates, in conjunction with the limiting rods, can limit the movement of two crack plates, thereby effectively reducing the displacement of the crack plates and improving the simulation effect.

[0017] 2. After the simulation is completed, the valve on the medium discharge pipe is opened by the set limit mechanism, so that the internal medium can be discharged to the outside for easy use next time. By unscrewing the limit bolts on the connector, the outer shell of the device can be removed from the device frame. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a half-sectional structural diagram of the outer shell of the device of this utility model;

[0021] Figure 3 For the present utility model Figure 2 Enlarged view of A in the middle;

[0022] Figure 4 This is a three-dimensional structural diagram of the outer shell of the device of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Device frame; 2. Device housing; 3. Crack plate; 31. Positioning hole; 32. Limiting rod; 33. Protective cover; 34. Fixing bolt; 35. Sealing ring; 36. Sealing groove; 4. Delivery pipe; 5. Delivery pump; 6. Fixing component; 61. Fixing screw; 62. Connecting component; 63. Limiting bolt; 7. Pressure sensor; 8. Medium discharge pipe; 9. Casters. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a technical solution:

[0027] Please see Figures 1 to 4 A simulated core test device for large pore fractures includes a device frame 1, a device shell 2 is installed inside the device frame 1, an experimental mechanism for core testing is provided inside the device shell 2, and a limiting mechanism for limiting the device is provided on the outer wall of the device shell 2.

[0028] The experimental mechanism includes a crack plate 3, which is placed inside the outer shell 2 of the device. Two positioning holes 31 are opened on the lower surface of the crack plate 3. Limiting rods 32, which are fixedly connected to the crack plate 3, are inserted into the two positioning holes 31. A protective cover 33 is provided on the upper part of the crack plate 3. A fixing bolt 34, which is threadedly connected to the outer shell 2 of the device, is installed inside the protective cover 33. A sealing ring 35 is fixed on the lower surface of the protective cover 33. A sealing groove 36 opened on the outer shell 2 of the device is inserted into the lower part of the sealing ring 35. A delivery pipe 4, which is connected to the outer shell 2 of the device, is connected to the upper surface of the protective cover 33. A delivery pump 5, which is fixed on the device frame 1, is connected to the end of the delivery pipe 4.

[0029] By adopting the above technical solution, before using the simulated large-pore fracture core test device, the device is first moved to a suitable position, and the fracture plate 3 to be simulated is placed inside the device shell 2. By stacking multiple fracture plates 3, large-pore fracture rock can be simulated. Through the positioning hole 31 opened on the fracture plate 3, with the cooperation of the limiting rod 32, two fracture plates 3 can be limited, thereby effectively reducing the displacement of the fracture plate 3 and improving the simulation effect. After placement, the protective cover 33 is placed on the device shell 2. With the cooperation of the sealing ring 35 and the sealing groove 36, it can play a sealing role, thereby reducing the leakage of the medium. By tightening the fixing bolt 34 on the protective cover 33, the protective cover 33 can be fixed. The input end of the delivery pump 5 is connected to the external medium pipe. Through the delivery pipe 4, the delivery pump 5 delivers the medium into the device shell 2 for simulation.

[0030] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the limiting mechanism includes a fixing member 6, which is sleeved on the outer wall of the device housing 2. The outer wall of the fixing member 6 is fitted with a fixing screw 61 that abuts against the device housing 2. Two connecting members 62 are fixed on the outer surface of the fixing member 6. Limiting bolts 63 that are threadedly connected to the device frame 1 are installed at both ends of the two connecting members 62. A pressure sensor 7 is installed on the outer wall of the device housing 2. A medium discharge pipe 8 is connected to the lower surface of the device housing 2. A caster wheel 9 is fixed to the lower surface of the device frame 1 by bolts.

[0031] By adopting the above technical solution, the universal wheels 9 set on the device frame 1 facilitate the movement of the device. The pressure sensor 7 can detect the internal pressure. After the simulation is completed, the valve on the medium discharge pipe 8 is opened so that the internal medium can be discharged to the outside for easy use next time. By unscrewing the limiting bolt 63 on the connecting piece 62, the device shell 2 can be removed from the device frame 1. By loosening the fixing screw 61 on the fixing piece 6, the limiting of the device shell 2 can be released, so that the height of the device shell 2 can be adjusted.

[0032] Working principle: The fracture plate 3 to be simulated is placed inside the device housing 2. By stacking multiple fracture plates 3, large-pore fractured rock can be simulated. The positioning holes 31 on the fracture plates 3, with the cooperation of the limiting rod 32, limit the two fracture plates 3, thereby effectively reducing the displacement of the fracture plates 3. After placement, the protective cover 33 is placed on the device housing 2. With the cooperation of the sealing ring 35 and the sealing groove 36, a sealing effect is achieved, thereby reducing the possibility of media leakage. By tightening the fixing bolts 34 on the protective cover 33, the protective cover 33 can be secured. 3. The input end of the delivery pump 5 is connected to the external medium pipe. The delivery pump 5 delivers the medium to the device housing 2 through the delivery pipe 4 for simulation. The internal pressure can be detected by the pressure sensor 7. After the simulation is completed, the valve on the medium discharge pipe 8 is opened so that the internal medium can be discharged to the outside for the next use. By unscrewing the limiting bolt 63 on the connector 62, the device housing 2 is removed from the device frame 1. By loosening the fixing screw 61 on the fixing part 6, the limitation on the device housing 2 is released, and the height of the device housing 2 is adjusted.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A simulated core testing device for large-pore fractures, comprising a device frame (1), characterized in that: The device frame (1) is equipped with a device shell (2), the device shell (2) is equipped with an experimental mechanism for core experiments, and the outer wall of the device shell (2) is equipped with a limiting mechanism for limiting the device. The experimental mechanism includes a crack plate (3), which is placed inside the outer shell (2) of the device. Two positioning holes (31) are opened on the lower surface of the crack plate (3). A limiting rod (32) that is fixedly connected to the crack plate (3) is inserted into the two positioning holes (31). A protective cover (33) is provided on the top of the crack plate (3).

2. The experimental apparatus for simulating large-pore fracture cores according to claim 1, characterized in that: The protective cover (33) is fitted with a fixing bolt (34) that is threadedly connected to the outer casing (2) of the device.

3. The experimental apparatus for simulating large-pore fracture cores according to claim 2, characterized in that: A sealing ring (35) is fixed on the lower surface of the protective cover (33), and a sealing groove (36) opened on the outer shell (2) of the device is inserted and connected below the sealing ring (35).

4. The experimental apparatus for simulating large-pore fracture cores according to claim 3, characterized in that: The upper surface of the protective cover (33) is connected to a delivery pipe (4) that is connected to the outer shell (2) of the device, and the end of the delivery pipe (4) is connected to a delivery pump (5) fixed on the device frame (1).

5. The experimental apparatus for simulating large-pore fracture cores according to claim 1, characterized in that: The limiting mechanism includes a fixing member (6), which is sleeved on the outer wall of the device housing (2). The outer wall of the fixing member (6) is fitted with a fixing screw (61) that abuts against the device housing (2).

6. The experimental apparatus for simulating large-pore fracture cores according to claim 5, characterized in that: Two connectors (62) are fixed to the outer surface of the fastener (6), and both ends of the two connectors (62) are fitted with limit bolts (63) that are threadedly connected to the device frame (1).

7. The experimental apparatus for simulating large-pore fracture cores according to claim 1, characterized in that: A pressure sensor (7) is installed on the outer wall of the device housing (2), a medium discharge pipe (8) is connected to the lower surface of the device housing (2), and a caster wheel (9) is fixed to the lower surface of the device frame (1) by bolts.

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