Radial fracture seepage test device and test method thereof

Abstract

The invention relates to a radial fracture seepage test device and a test method thereof.The radial fracture seepage test device comprises a lower cylinder body, an upper cylinder body, an automatic distance adjusting assembly and a turnover device, and the lower cylinder body is used for containing a lower rock sample; the upper cylinder body is used for placing an upper rock sample; the upper cylinder body is arranged at the driving end of the automatic spacing adjusting assembly and used for driving the upper cylinder body to move towards the lower cylinder body. The upper cylinder body is connected with the distance automatic adjusting assembly through the turnover device, and the upper cylinder body is rotatably connected with the distance automatic adjusting assembly through the turnover device, so that the upper cylinder body can adjust the opening orientation of the upper cylinder body through the turnover device, and a worker can conveniently install an upper rock sample in the upper cylinder body; in the embodiment of the invention, the opening orientation of the upper cylinder body and the distance between the upper cylinder body and the lower cylinder body are respectively controlled through the turnover device and the automatic distance adjusting assembly, so that a worker can conveniently install a rock sample, the automatic adjustment of the distance can be realized, and the operation difficulty of the test device is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of rock mechanics, and in particular to a radial fracture seepage test device and a test method thereof. Background Art

[0002] In the fields of geology, petroleum engineering, environmental science, etc., it is of great significance to study the seepage characteristics of fracture systems. The distribution and characteristics of fracture systems in nature directly affect processes such as groundwater flow, oil and gas extraction, and pollutant migration. Therefore, it is crucial to develop an experimental device that can effectively study the seepage characteristics of fractures. Summary of the Invention

[0003] In order to solve the technical problem of how to provide an experimental device that can effectively study the seepage characteristics of fractures, so as to study the processes such as groundwater flow, oil and gas extraction, and pollutant migration directly affected by the distribution and characteristics of fracture systems in nature, the present application provides a radial fracture seepage test device. By using a flipping device and a spacing automatic adjustment component to respectively control the opening direction of the upper cylinder body and the spacing between the upper cylinder body and the lower cylinder body, it is not only convenient for staff to install rock samples, but also can realize automatic adjustment of the spacing, simplifying the operation difficulty of the test device.

[0004] To solve the above technical problems, the following technical solutions are now proposed:

[0005] The present application provides a radial fracture seepage test device, including:

[0006] A lower cylinder body for placing a lower rock sample;

[0007] An upper cylinder body for placing an upper rock sample;

[0008] A spacing automatic adjustment component, on which the upper cylinder body is arranged, for driving the upper cylinder body to move towards the lower cylinder body;

[0009] A flipping device, the upper cylinder body is connected to the spacing automatic adjustment component through the flipping device, and the upper cylinder body is rotatably connected to the spacing automatic adjustment component through the flipping device, for adjusting the opening direction of the upper cylinder body so that the opening direction of the upper cylinder body is opposite or facing the opening direction of the lower cylinder body.

[0010] Further, in this embodiment, the spacing automatic adjustment component includes a guide rail and a driving device. The upper cylinder body is slidably arranged on the guide rail through the flipping device, and the driving device is used to drive the upper cylinder body to slide along the guide rail towards the lower cylinder body.

[0011] Further, in this embodiment, the spacing automatic adjustment assembly includes two sets of the guide rails, and the two sets of guide rails are respectively arranged on both sides of the lower cylinder body and are connected to the lower cylinder body through the flipping device.

[0012] Further, in this embodiment, the driving device includes a lead screw and a slider. The slider is arranged on the lead screw and forms a screw drive mechanism with the lead screw. The upper cylinder body is connected to the slider through the flipping device, and the lead screw drives the upper cylinder body to move through the slider.

[0013] Further, in this embodiment, the flipping device includes:

[0014] A sleeve, which is fixedly arranged on the spacing automatic adjustment assembly;

[0015] A rotating shaft, one end of which is fixedly connected to the upper cylinder body, and the other end of the rotating shaft extends into the sleeve and is rotatably connected to the sleeve; a rotating groove and a clamping groove that communicate with each other are also arranged on the outer side wall of the rotating shaft, and the rotating groove is arranged along the circumferential direction of the rotating shaft;

[0016] A clamping member, which is slidably arranged on the sleeve, and one end of the clamping member extends into the clamping groove;

[0017] A pushing device, which is used to drive the clamping member to move into the rotating groove.

[0018] Further, in this embodiment, the flipping device further includes a return spring, which is used to drive the clamping member to move into the clamping groove.

[0019] Further, in this embodiment, the pushing device includes:

[0020] A pushing member, a sliding groove is arranged on the inner side wall of the sleeve, the clamping member and the pushing member are both slidably arranged in the sliding groove, and one end of the pushing member contacts the clamping member and is used to push the clamping member to slide;

[0021] A rotating handle, which is rotatably arranged on the sleeve, and one end of the rotating handle extends into the sliding groove and is connected to the pushing member. When the rotating handle is driven to rotate, the pushing member drives the clamping member to slide.

[0022] Further, in this embodiment, the pushing device further includes a torsion spring, which is used to drive the rotating handle to reset.

[0023] Further, in this embodiment, two clamping grooves are arranged on the rotating shaft, and the two clamping grooves are respectively arranged at both ends of the rotating groove.

[0024] Further, in this embodiment, it further includes a glue injection assembly for injecting a colloid for fixing the upper rock sample or the lower rock sample into the upper cylinder body and the lower cylinder body.

[0025] The present application also provides a radial fracture seepage test method, which applies the radial fracture seepage test device described in any one of the above, and is characterized by including the following steps:

[0026] Adjust the opening direction of the upper cylinder body through the flipping device so that the opening direction of the upper cylinder body is the same as that of the lower cylinder body.

[0027] Place the upper rock sample and the lower rock sample in the corresponding upper cylinder body and lower cylinder body respectively.

[0028] Adjust the opening direction of the upper cylinder body again through the flipping device so that the opening direction of the upper cylinder body is oppositely arranged to that of the lower cylinder body.

[0029] Drive the upper cylinder body to move towards the lower cylinder body through the spacing automatic adjustment assembly.

[0030] Among them, when the upper rock sample and the lower rock sample are respectively placed in the corresponding upper cylinder body and lower cylinder body, inject a colloid for fixing the upper rock sample or the lower rock sample into the upper cylinder body and the lower cylinder body.

[0031] Remove the bubbles in the colloid by vacuum defoaming.

[0032] After the upper rock sample and the lower rock sample are respectively placed in the corresponding upper cylinder body and lower cylinder body, adjust the positions of the upper rock sample and the lower rock sample so that the projections of the upper rock sample and the lower rock sample along the movement direction of the upper cylinder body coincide.

[0033] Beneficial effects: The present application provides a radial fracture seepage test device and its test method. The test device includes a lower cylinder body, an upper cylinder body, a spacing automatic adjustment assembly and a flipping device. Among them, the lower cylinder body is used to place the lower rock sample; the upper cylinder body is used to place the upper rock sample, and when the upper rock sample and the lower rock sample are respectively arranged in the corresponding upper cylinder body and lower cylinder body, the upper rock sample and the lower rock sample are coaxially arranged; the upper cylinder body is arranged at the driving end of the spacing automatic adjustment assembly and is used to drive the upper cylinder body to move towards the lower cylinder body; the upper cylinder body is connected to the spacing automatic adjustment assembly through the flipping device, and the upper cylinder body is rotatably connected to the spacing automatic adjustment assembly through the flipping device, so that the upper cylinder body can adjust the opening orientation of the upper cylinder body through the flipping device, which is convenient for the staff to install the upper rock sample in the upper cylinder body; in this embodiment, by respectively controlling the opening orientation of the upper cylinder body and the spacing between the upper cylinder body and the lower cylinder body through the flipping device and the spacing automatic adjustment assembly, it is not only convenient for the staff to install the rock sample, but also can realize the automatic adjustment of the spacing, simplifying the operation difficulty of the test device. Description of the Drawings

[0034] Figure 1 Schematic structural diagram of a radial fracture seepage test device provided by an embodiment of the present invention;

[0035] Figure 2 Cross-sectional view of a radial fracture seepage test device provided by an embodiment of the present invention;

[0036] Figure 3 Schematic structural diagram of the upper cylinder part provided by an embodiment of the present invention;

[0037] Figure 4 Schematic structural diagram of the flipping device part provided by an embodiment of the present invention;

[0038] Figure 5 Schematic structural diagram of the flipping device when the sleeve and the rotating shaft are in a clamped state provided by an embodiment of the present invention;

[0039] Figure 6 Schematic structural diagram of the flipping device when the sleeve and the rotating shaft are in a rotating state provided by an embodiment of the present invention;

[0040] Figure 7 Exploded view of the flipping device part provided by an embodiment of the present invention;

[0041] Figure 8 Schematic structural diagram of the sleeve part provided by an embodiment of the present invention;

[0042] Figure 9 Plane development view of the rotating groove and the clamping groove on the rotating shaft provided by an embodiment of the present invention.

[0043] Explanation of reference numerals

[0044] 1. Lower cylinder; 2. Upper cylinder; 3. Spacing automatic adjustment assembly; 4. Flipping device; 5. Guide rail; 6. Lead screw; 7. Slide block; 8. Sleeve; 9. Rotating shaft; 10. Clamping member; 11. Return spring; 12. Rotating groove; 13. Clamping groove; 14. Chute; 15. Pushing member; 16. Rotating handle; 17. Tapered tooth; 18. Rack; 19. Accommodating groove; 20. Driving groove; 21. Glue injection assembly. Detailed implementation manners

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two, unless otherwise specifically defined.

[0048] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0050] In the description of the embodiments of this application, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0053] Resources such as groundwater, oil and gas, coalbed methane, and geothermal energy can only be exploited in rock formations with highly developed fractures. Hydraulic fracturing of oil and gas formations and coal seams requires more precise control of the fluid injection volume in the fractures of the rock formation, while geological sequestration of radioactive nuclear waste, underground storage of CO2, etc. require minimizing fluid infiltration in the rock mass. The fractures formed after rock rupture are the main seepage channels, and obtaining the fracture flow characteristics is the premise for controlling the influence of rock seepage. Therefore, in the fields of geology, petroleum engineering, and environmental science, it is of great significance to study the seepage characteristics of the fracture system. The distribution and characteristics of the fracture system in nature directly affect processes such as groundwater flow, oil and gas extraction, and pollutant migration. Therefore, it is crucial to develop an experimental device that can effectively study the seepage characteristics of fractures.

[0054] To solve the technical problem of how to provide an experimental device that can effectively study the seepage characteristics of fractures, so as to facilitate the study of processes such as the distribution and characteristics of the fracture system in nature directly affecting groundwater flow, oil and gas extraction, and pollutant migration, the present application provides a radial fracture seepage test device. By using the flipping device 4 and the spacing automatic adjustment component 3 to control the opening orientation of the upper cylinder 2 and the spacing between the upper cylinder 2 and the lower cylinder 1 respectively, it is not only convenient for the staff to install the rock sample, but also can realize the automatic adjustment of the spacing, simplifying the operation difficulty of the test device.

[0055] As Figure 1 shown, Figure 1This application provides a structural schematic diagram of a radial fracture seepage test device. The test device includes a lower cylinder body 1, an upper cylinder body 2, a spacing automatic adjustment component 3, and a flipping device 4. Among them, the lower cylinder body 1 is used to place the lower rock sample; the upper cylinder body 2 is used to place the upper rock sample, and when the upper rock sample and the lower rock sample are respectively arranged in the corresponding upper cylinder body 2 and lower cylinder body 1, the upper rock sample and the lower rock sample are coaxially arranged; the upper cylinder body 2 is arranged at the driving end of the spacing automatic adjustment component 3 and is used to drive the upper cylinder body 2 to move towards the lower cylinder body 1; the upper cylinder body 2 is connected to the spacing automatic adjustment component 3 through the flipping device 4, and the upper cylinder body 2 is rotatably connected to the spacing automatic adjustment component 3 through the flipping device 4, so that the upper cylinder body 2 can adjust the opening direction of the upper cylinder body 2 through the flipping device 4, facilitating the staff to install the upper rock sample into the upper cylinder body 2; in this embodiment, by separately controlling the opening direction of the upper cylinder body 2 and the spacing between the upper cylinder body 2 and the lower cylinder body 1 through the flipping device 4 and the spacing automatic adjustment component 3, it is not only convenient for the staff to install the rock sample, but also can realize the automatic adjustment of the spacing, simplifying the operation difficulty of the test device.

[0056] Specifically, it includes the following steps:

[0057] S1. Install the upper rock sample and the lower rock sample

[0058] Adjust the opening direction of the upper cylinder body 2 through the flipping device 4 so that the opening direction of the upper cylinder body 2 is the same as the opening direction of the lower cylinder body 1, that is, both the opening direction of the upper cylinder body 2 and the opening direction of the lower cylinder body 1 are set upward.

[0059] Place the upper rock sample and the lower rock sample in the corresponding upper cylinder body 2 and lower cylinder body 1 respectively, and adjust the positions of the upper rock sample and the lower rock sample so that the upper rock sample and the lower rock sample are coaxially arranged.

[0060] After fixing the upper rock sample and the lower rock sample in the corresponding upper cylinder body 2 and lower cylinder body 1 respectively, adjust the opening direction of the upper cylinder body 2 again through the flipping device 4 so that the opening direction of the upper cylinder body 2 is opposite to the opening direction of the lower cylinder body 1.

[0061] S2. Test loading process

[0062] Drive the upper cylinder body 2 to move towards the lower cylinder body 1 through the spacing automatic adjustment component 3, control the relative displacement between the upper and lower rock samples, and simulate the fracture closure under compressive stress.

[0063] And during the process of controlling the relative displacement between the upper and lower rock samples, inject fluid into the rock samples to observe the radial seepage process.

[0064] S3. Data analysis

[0065] Record data such as fluid flow rate, pressure, and the distance between the upper and lower rock samples in real time, and through the analysis of the above data, the research on the permeability of natural rock fractures is realized.

[0066] Exemplarily, as Figure 2 shown, in this embodiment, the spacing automatic adjustment assembly 3 includes a guide rail 5 and a driving device. The upper cylinder body 2 is slidably arranged on the guide rail 5 through a flipping device 4. It can be understood that during the process of controlling the relative displacement between the upper and lower rock samples, the driving device drives the upper cylinder body 2 to slide along the guide rail 5 towards the lower cylinder body 1, so that the upper cylinder body 2 can move in a fixed direction, and further enables the upper rock sample and the lower rock sample to always be coaxially arranged, improving the stability of the test device during use.

[0067] Exemplarily, as Figure 2 shown, in this embodiment, the spacing automatic adjustment assembly 3 includes two groups of guide rails 5. The two groups of guide rails 5 are respectively arranged on both sides of the upper cylinder body 2 and are connected to the lower cylinder body 1 through a flipping device 4. In this embodiment, the two groups of guide rails 5 respectively support both sides of the upper cylinder body 2, further improving the stability of the driving device during the process of driving the upper cylinder body 2 to move along the guide rail 5.

[0068] Exemplarily, in this embodiment, the driving device includes a lead screw 6 and a slider 7. The slider 7 is arranged on the lead screw 6 and forms a screw drive mechanism with the lead screw 6. The upper cylinder body 2 is connected to the slider 7 through a flipping device 4. The lead screw 6 drives the upper cylinder body 2 to move through the slider 7. It can be understood that in this embodiment, the movement and power transmission are realized through the screwing of the thread on the lead screw 6 and the slider 7. When the lead screw 6 is driven to rotate, the slider 7 on the lead screw 6 will move along the axis direction of the lead screw 6, and then drive the upper cylinder body 2 to move, thereby realizing the precise control of the relative displacement between the upper and lower rock samples.

[0069] Furthermore, as Figure 4 shown, in this embodiment, the flipping device 4 includes: a sleeve 8, a rotating shaft 9, a clamping member 10, and a pushing device. The sleeve 8 is fixedly arranged on the spacing automatic adjustment assembly 3; one end of the rotating shaft 9 is fixedly connected to the upper cylinder body 2, and the other end of the rotating shaft 9 extends into the sleeve 8 and is rotatably connected to the sleeve 8; a rotating groove 12 and a clamping groove 13 that communicate with each other are also provided on the outer side wall of the rotating shaft 9. The rotating groove 12 is arranged along the circumferential direction of the rotating shaft 9, while the clamping groove 13 is arranged along the axis direction of the rotating shaft 9; the clamping member 10 is slidably arranged on the sleeve 8, and one end of the clamping member 10 extends towards the center of the sleeve and extends into the clamping groove 13 on the rotating shaft 9. When the pushing device in the sleeve 8 drives the clamping member 10 to move, the clamping member 10 can move from the rotating groove 12.

[0070] It can be understood that, as Figures 5 - 6As shown, in this embodiment, there are two sets of motion states between the sleeve 8 and the rotating shaft 9. One is the rotating state in which the sleeve 8 and the rotating shaft 9 can rotate relative to each other, that is, as shown in Figure 6 shown. The other is the clamping state in which the sleeve 8 and the rotating shaft 9 cannot rotate relative to each other, that is, as shown in Figure 5 shown. When the sleeve 8 and the rotating shaft 9 are in the clamping state, the clamping member 10 is placed in the clamping groove 13. At this time, the clamping member 10 abuts against the side wall of the clamping groove 13, thereby preventing the relative rotation between the sleeve 8 and the rotating shaft 9. When the sleeve 8 and the rotating shaft 9 change from the clamping state to the rotating state, the clamping member 10 is pushed from the clamping groove 13 to the rotating groove 12 by the pushing device. Since the rotating groove 12 is arranged along the circumferential direction of the rotating shaft 9, when the sleeve 8 and the rotating shaft 9 rotate relative to each other, the clamping member 10 can rotate along the rotating groove 12.

[0071] Exemplarily, in this embodiment, the flipping device 4 further includes a return spring 11. The return spring 11 is used to drive the clamping member 10 to move into the clamping groove 13, making the use of the test device simpler. It can be understood that in this embodiment, when the upper cylinder body 2 adjusts the opening direction of the upper cylinder body 2 through the flipping device 4 so that the opening of the upper cylinder body 2 faces upward or downward, the clamping member 10 slides to the communication position of the rotating groove 12 and the clamping groove 13. At this time, the clamping member 10 slides from the rotating groove 12 to the clamping groove 13 under the action of the return spring 11, thereby changing the state between the sleeve 8 and the rotating shaft 9 from the rotating state to the clamping state.

[0072] Exemplarily, as Figure 7 shown, in this embodiment, the pushing device includes a pushing member 15 and a rotating handle 16. A sliding groove 14 is provided on the inner side wall of the sleeve 8. The clamping member 10 and the pushing member 15 are slidably arranged in the sliding groove 14, and one end of the pushing member 15 is in contact with the clamping member 10 for pushing the clamping member to slide. The rotating handle 16 is rotatably arranged on the sleeve 8, and one end of the rotating handle 16 extends into the sliding groove 14 and is connected to the pushing member 15. When the rotating handle 16 is rotated, the pushing member 15 drives the clamping member 10 to slide. It can be understood that in this implementation, by rotating the rotating handle 16 to drive the pushing member 15 to push the clamping member 10 to slide, not only can the human power be more effectively transmitted to the driving pushing member 15, but also the operation is simpler and more intuitive, making it easier for users to operate the test equipment.

[0073] Exemplarily, as Figure 7As shown, in this embodiment, the rotating handle 16 drives the sliding of the pushing member 15 through the combination of the conical teeth 17 and the rack 18. Specifically, a receiving groove 19 and a driving groove 20 are further provided in the sleeve 8. One end of the driving groove 20 communicates with the sliding groove 14, and the other end of the driving groove 20 communicates with the receiving groove 19. The clamping member 10 and the pushing member 15 are both arranged in the sliding groove 14. One end of the pushing member 15 contacts the clamping member 10, and the other end of the pushing member 15 extends into the driving groove 20. The rack 18 is slidably arranged in the driving groove 20. One end of the rack 18 is used to contact the pushing member 15 and push the pushing member 15 to slide away from the driving groove 20. One end of the rotating handle 16 extends into the receiving groove 19 and meshes with the other end of the rack 18 through the conical teeth 17. When the rotating handle 16 is rotated horizontally, the horizontal rotation is converted into a longitudinal rotation perpendicular to the horizontal direction through the conical teeth 17, and the rack 18 is driven to slide along the driving groove 20. During the sliding process of the rack 18 along the driving groove 20, the rack 18 contacts the pushing member 15 and pushes the pushing member 15 to slide away from the driving groove 20, thereby driving the clamping member 10 to move from the clamping groove 13 to the rotating groove 12.

[0074] Exemplarily, in this embodiment, inclined surfaces are provided at both ends of the rack 18 and the pushing member 15 that are in contact with each other. When the rack 18 contacts the pushing member 15, the two inclined surfaces are mutually attached. In this embodiment, through the inclined surfaces at the ends of the rack 18 and the pushing member 15, the rack 18 can more easily push the pushing member 15 to slide.

[0075] Exemplarily, as Figure 8 shown, in this embodiment, the communicating part of the driving groove 20 and the sliding groove 14 is located at a non-end part of the driving groove 20. It can be understood that after the rack 18 drives the clamping member 10 to move to the rotating groove 12 through the pushing member 15, the rotating handle 16 can continue to drive the rack 18 to move towards the end of the driving groove 20 away from the rotating handle 16, so that the pushing member 15 can be clamped with the side wall of the rack 18. At this time, through the mutually clamped rack 18 and the pushing member 15, after the user releases the rotating handle 16, the rack 18 can always maintain a state of abutting against the pushing member 15, which can prevent the clamping member 10 from returning to the clamping groove 13 under the action of the return spring 11 after the user releases the rotating handle 16, so as to facilitate the user to rotate the upper cylinder body 2.

[0076] Further, as Figure 9 shown, in this embodiment, two clamping grooves 13 are provided on the rotating shaft 9, and the two clamping grooves 13 are respectively arranged at both ends of the rotating groove 12, so that the upper cylinder body 2 can be in a clamped state whether the opening faces upward or downward, thereby ensuring the stability of the upper cylinder body 2 during use.

[0077] Further, as Figure 3As shown, in this embodiment, it further includes a glue injection assembly 21. The glue injection assembly 21 is used to inject a colloid for fixing the upper rock sample or the lower rock sample into the upper cylinder 2 and the lower cylinder 1. The upper rock sample or the lower rock sample is fixed in the upper cylinder 2 and the lower cylinder 1 through the colloid, which can not only increase the stability of the upper cylinder 2 and the lower cylinder 1 when fixing the upper and lower rock samples, but also enable the upper cylinder 2 and the lower cylinder 1 to adapt to rock samples of different shapes and sizes.

[0078] Exemplarily, the glue injection assembly 21 includes a glue storage tank, a heating adjustment knob, a constant temperature heating device, and two delivery conduits. The glue storage tank is used to store the colloid. The two delivery conduits are both arranged on the glue storage tank. The two delivery rails are respectively communicated with the upper cylinder and the lower cylinder. The glue storage tank delivers the colloid into the upper cylinder and the lower cylinder respectively through the delivery rails. The constant temperature heating device is used to heat the colloid in the glue storage tank so that the colloid forms a flowable liquid substance. The heating adjustment knob is electrically connected to the constant temperature heating device and is used to control the constant temperature heating device. It can be understood that when the upper rock sample and the lower rock sample are respectively placed in the corresponding upper cylinder 2 and lower cylinder 1, the constant temperature heating device is controlled by the heating adjustment knob to heat the colloid in the glue storage tank, so that the colloid in the glue storage tank can be delivered into the upper cylinder 2 and the lower cylinder 1 through the delivery conduits.

[0079] Exemplarily, the glue injection assembly further includes an automatic rewinding device. The delivery conduit is wound around the automatic rewinding device. When the upper cylinder 2 is driven to move towards the lower cylinder 1 by the spacing automatic adjustment assembly 3, the automatic rewinding device is used to control the delivery conduit to automatically contract along with the movement of the upper cylinder 2.

[0080] This application also provides a radial fracture seepage test method, which applies the radial fracture seepage test device of any one of the above, and is characterized in that it includes the following steps:

[0081] S1. Adjust the opening direction of the upper cylinder 2 through the flipping device 4 so that the opening direction of the upper cylinder 2 is the same as the opening direction of the lower cylinder 1;

[0082] S2. Place the upper rock sample and the lower rock sample in the corresponding upper cylinder 2 and lower cylinder 1 respectively;

[0083] S3. Adjust the opening direction of the upper cylinder 2 again through the flipping device 4 so that the opening direction of the upper cylinder 2 is oppositely arranged to the opening direction of the lower cylinder 1;

[0084] S4. Drive the upper cylinder 2 to move towards the lower cylinder 1 through the spacing automatic adjustment assembly 3;

[0085] Among them, step S2: Placing the upper rock sample and the lower rock sample in the corresponding upper cylinder and lower cylinder respectively specifically includes the following steps:

[0086] S21. Seal the openings of the upper cylinder block 2 and the lower cylinder block 1 with a sealing cover, so as to form a sealed cavity inside the upper cylinder block 2 and the lower cylinder block 1;

[0087] S22. Inject a colloid for fixing the upper rock sample or the lower rock sample into the upper cylinder block 2 and the lower cylinder block 1 through the glue injection assembly 21;

[0088] S23. Extract the air inside the upper cylinder block 2 and the lower cylinder block 1 to form a vacuum environment inside the upper cylinder block 2 and the lower cylinder block 1, remove the bubbles in the colloid by means of vacuum defoaming, and make the colloid inside the upper cylinder block 2 and the lower cylinder block 1 evenly distributed;

[0089] S24. After the bubbles in the colloid are removed, open the sealing cover at the opening of the upper cylinder block 2 and the lower cylinder block 1, respectively place the upper rock sample and the lower rock sample in the corresponding upper cylinder block 2 and lower cylinder block 1, adjust the positions of the upper rock sample and the lower rock sample so that the projections of the upper rock sample and the lower rock sample in the moving direction of the upper cylinder block 2 coincide, and wait for the colloid to solidify.

[0090] It should be noted that this application is not limited to the above embodiments. The above embodiments are only examples, and the embodiments with the same composition and the same function and effect as the technical idea within the technical solution scope of this application are all included in the technical scope of this application. In addition, within the scope not departing from the gist of this application, various deformations that can be thought of by those skilled in the art are applied to the embodiments, and other ways constructed by combining some constituent elements in the embodiments are also included in the scope of this application.

Claims

1. A radial fracture seepage test device, characterized in that Comprising: A lower cylinder block for placing a lower rock sample; An upper cylinder block for placing an upper rock sample; A spacing automatic adjustment assembly, on which the upper cylinder block is arranged, for driving the upper cylinder block to move towards the lower cylinder block; A flipping device, the upper cylinder block is connected to the spacing automatic adjustment assembly through the flipping device, and the upper cylinder block is rotatably connected to the spacing automatic adjustment assembly through the flipping device, for adjusting the opening direction of the upper cylinder block so that the opening direction of the upper cylinder block is opposite or facing the opening direction of the lower cylinder block.

2. The radial fracture seepage test device according to claim 1, characterized in that, The spacing automatic adjustment assembly includes a guide rail and a driving device. The upper cylinder block is slidably arranged on the guide rail through the flipping device, and the driving device is used for driving the upper cylinder block to slide along the guide rail towards the lower cylinder block.

3. The radial fracture seepage test device according to claim 2, characterized in that, The spacing automatic adjustment assembly includes two groups of the guide rails, and the two groups of the guide rails are respectively arranged on both sides of the lower cylinder block and are connected to the lower cylinder block through the flipping device.

4. The radial fracture seepage test device according to claim 2, characterized in that, The driving device includes a lead screw and a slider. The slider is arranged on the lead screw and forms a screw drive mechanism with the lead screw. The upper cylinder block is connected to the slider through the flipping device, and the lead screw drives the upper cylinder block to move through the slider.

5. The radial fracture seepage test device according to claim 1, characterized in that, The flipping device includes: A sleeve fixedly arranged on the spacing automatic adjustment assembly; A rotating shaft, one end of the rotating shaft is fixedly connected to the upper cylinder block, the other end of the rotating shaft extends into the sleeve and is rotatably connected to the sleeve; a rotating groove and a clamping groove that communicate with each other are also arranged on the outer side wall of the rotating shaft, and the rotating groove is arranged along the circumferential direction of the rotating shaft; A clamping member slidably arranged on the sleeve, and one end of the clamping member extends into the clamping groove; A pushing device for driving the clamping member to move into the rotating groove.

6. The radial fracture seepage test device according to claim 5, characterized in that, The flipping device further includes a return spring for driving the clamping member to move into the clamping groove.

7. The radial fracture seepage test device according to claim 5, wherein, The pushing device includes: A pushing member, a sliding groove is arranged on the inner side wall of the sleeve, the clamping member and the pushing member are both slidably arranged in the sliding groove, and one end of the pushing member contacts the clamping member for pushing the clamping member to slide; A rotating handle rotatably arranged on the sleeve, and one end of the rotating handle extends into the sliding groove and is connected to the pushing member. When the rotating handle is driven to rotate, the pushing member drives the clamping member to slide.

8. The radial fracture seepage test device according to claim 5, characterized in that, Two clamping grooves are arranged on the rotating shaft, and the two clamping grooves are respectively arranged at both ends of the rotating groove.

9. The radial fracture seepage test device according to claim 1, characterized in that, It further includes a glue injection assembly for injecting a colloid for fixing the upper rock sample or the lower rock sample into the upper cylinder block and the lower cylinder block.

10. A method for radial fracture seepage test, which applies the radial fracture seepage test device as described in any one of claims 1-9, characterized in that, Including the following steps: Adjust the opening direction of the upper cylinder block through the flipping device so that the opening direction of the upper cylinder block is the same as the opening direction of the lower cylinder block; Place the upper rock sample and the lower rock sample in the corresponding upper cylinder block and lower cylinder block respectively; Adjust the opening direction of the upper cylinder block again through the flipping device so that the opening direction of the upper cylinder block is opposite to the opening direction of the lower cylinder block. Drive the upper cylinder body to move towards the lower cylinder body through the spacing automatic adjustment component; Among them, when placing the upper rock sample and the lower rock sample in the corresponding upper cylinder body and lower cylinder body respectively, inject a colloid for fixing the upper rock sample or the lower rock sample into the upper cylinder body and the lower cylinder body; Remove the bubbles in the colloid by means of vacuum degassing; After placing the upper rock sample and the lower rock sample in the corresponding upper cylinder body and lower cylinder body respectively, adjust the positions of the upper rock sample and the lower rock sample so that the projections of the upper rock sample and the lower rock sample along the movement direction of the upper cylinder body coincide.

Images