Core porosity testing device and testing method

Abstract

The invention discloses a core porosity testing device and a testing method, and relates to the technical field of rock porosity testing devices, comprising: a high-temperature and high-pressure regulator, which injects magnetic fluid particles into a core sample to be tested in cooperation with a core detection auxiliary component and a porosity dynamic detection component, and uses a matrix permanent magnet group to provide a basic magnetic field, and performs fine adjustment through an electromagnetic coil control structure to promote the magnetic fluid particles to form a controllable and flexible distribution, and then a neutron detector evaluates the porosity by detecting neutron signals in the core, thereby improving the performance and reliability of the core porosity testing device in actual use, ensuring the accuracy of the test results, and improving the efficiency of the core porosity test, and at the same time, enables an X-ray scanning end with multi-directional adjustment to move along a guide track, so that the core sample to be tested can be X-ray scanned from different angles, and the accuracy of the rock porosity test is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of rock porosity testing devices, in particular to a core porosity testing device and a testing method. Background Art

[0002] Core porosity refers to the ratio of the volume of pores in a rock to the volume of the rock, generally expressed as a percentage. The greater the porosity, the more pore space there is in the core, and the more oil and gas resources that may be stored. At the same time, rock porosity has a great influence on the stability of underground rocks. Therefore, during the relevant operations, it is necessary to sample and analyze the core to determine its core porosity in order to evaluate the stability of underground rocks.

[0003] However, in the prior art, when testing the porosity of the core, the conventional method mostly adopts Boyle's law double chamber method to measure the rock porosity, that is, during the overall measurement, the amount of gas injected into the sample chamber by the standard chamber is observed, and after reaching equilibrium, the porosity is judged. However, when testing by the above-mentioned Boyle's law double chamber method, the formed gas is difficult to completely fill the unconnected tiny pores in the dense rock, so that the accuracy of the core porosity detection cannot be guaranteed, and the time spent is relatively long, which makes the overall detection efficiency low. Therefore, it is necessary to design and propose a new and efficient core porosity testing device and testing method. Summary of the invention

[0004] The purpose of the present invention is to provide a core porosity testing device and a testing method to solve the problem proposed in the above background technology that when testing the porosity of the core, the conventional method mostly adopts the Boyle's law double-chamber method to measure the rock porosity, that is, during the overall measurement, the amount of gas injected into the sample chamber by the standard chamber is observed, and after reaching equilibrium, the porosity is judged. However, when the test is performed by the above-mentioned Boyle's law double-chamber method, the formed gas is difficult to completely fill the unconnected tiny pores in the dense rock, so that when the porosity of the core is detected, the accuracy cannot be guaranteed, and the time spent is relatively long, resulting in low overall detection efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a core porosity testing device, comprising:

[0006] A high-temperature and high-pressure regulator, which is installed on the top of the test box and is used to form a dynamic high-temperature and high-pressure environment to simulate the impact of the core under formation conditions;

[0007] The porosity dynamic detection component is installed at the top of the inner part of the test box, and is used to form multi-directional adjustments around the core sample to be tested, so as to mark the pores formed by the injected magnetic fluid particles in the core sample to be tested, and detect and analyze the fed-back pore data;

[0008] The core detection auxiliary component is installed on the surface of the side frame table, and is used to inject magnetic fluid particles into the core sample to be tested, and guide the magnetic fluid particles to flow inside the core sample to be tested through the magnetic field control, and test the core under the condition of periodic application of physical mechanical force on the external circumference.

[0009] Preferably, the porosity dynamic detection component comprises:

[0010] A transverse linear rail, a sliding position adjustment block, a hinge vertical guide rail and a sliding angle adjustment structure, wherein the transverse linear rail is fastened to the internal top side of the test box, the sliding position adjustment block is located at the bottom end of the transverse linear rail and is slidably connected thereto, and drives the hinge vertical guide rail and the structure it carries to be adjusted, the sliding angle adjustment structure is located at the side guide rail of the hinge vertical guide and is slidably connected thereto, a main frame is connected to the bottom of the sliding angle adjustment structure, and the sliding angle adjustment structure consists of a sliding saddle, a driving angle motor and two bevel gears, and is used to drive the main frame and the structure it carries to be adjusted.

[0011] Preferably, a three-section electric driving arm is hinged at the bottom end of the main frame, a first rotating joint is hinged at the top end of the side of the three-section electric driving arm, an electric telescopic rod is hinged at the bottom of the first rotating joint, the first rotating joint is used to connect the bottom end of the main frame, the top end of the side of the three-section electric driving arm and the top of the electric telescopic rod, a second rotating joint is hinged at the bottom end of the side of the three-section electric driving arm, and the second rotating joint is used to connect the bottom end of the side of the three-section electric driving arm and the bottom of the electric telescopic rod.

[0012] Preferably, a bracket is connected to the side of the second rotating joint, an electric rotating ball joint is installed on the side end of the bracket, a rotation angle gyroscope is connected to the side end of the electric rotating ball joint, the side end of the rotation angle gyroscope is fastened with a semi-annular toothed guide frame, and an X-ray scanning end is slidably connected inside the side end of the semi-annular toothed guide frame.

[0013] Preferably, the core detection auxiliary component includes:

[0014] A main rotating motor, a rotating table plate, an edge fixing frame, a first hydraulic cylinder and a second hydraulic cylinder. The main rotating motor is connected and arranged at the bottom of the center end of the rotating table plate. The edge fixing frame drives the first hydraulic cylinder to be fastened to the side surface of the bottom base of the rotating table plate. The second hydraulic cylinder is located on the top wall surface of the bottom base of the rotating table plate. Matrix permanent magnet groups are installed on the sides of the first hydraulic cylinder and the second hydraulic cylinder. Detection pressure parts are installed on the output ends of the first hydraulic cylinder and the second hydraulic cylinder. A vibration cylinder is fastened to the side surface of the top side surface of the bottom base of the rotating table plate. An electromagnetic coil control structure is externally sleeved on the side end of the vibration cylinder. A flexible vibration guide rod is connected to the output end of the vibration cylinder.

[0015] Preferably, a support frame is fastened to the bottom base surface of the rotating table plate, and a transverse adjustment guide frame is installed on the top side of the support frame. The transverse adjustment guide frame is used to drive an external grabbing robot arm to perform sliding adjustment, and a driving linear rail is fastened to the other side of the top of the support frame. The driving linear rail is internally slidably connected to a position sliding vertical guide rail, and the position sliding vertical guide rail is internally slidably connected to a sliding seat.

[0016] Preferably, a positioning seat is connected to the bottom of the sliding seat, a neutron detector is installed on the side end of the positioning seat, a high-pressure pump injector is fastened to the top of the bottom base of the moving table plate, and an injection core end is installed at the bottom end of the high-pressure pump injector.

[0017] Preferably, a guide conveyor belt structure is installed on the side of the side frame table, the bottom of the side frame table is supported and fixed by a supporting frame, and a PLC controller and a detection box controller are respectively installed on the bottom end of the side frame table.

[0018] Preferably, pneumatic sealing structures are installed on both the left and right sides of the test box, and the pneumatic sealing structures are used to seal the test box when conducting a porosity test on a core.

[0019] A method for testing a core porosity testing device comprises the following steps:

[0020] S1. First, the pneumatic sealing structure is in the open state, and then the core sample to be tested is placed on the rotating table plate using an external grabbing robot arm, and the pneumatic sealing structure is closed;

[0021] S2, the core detection auxiliary component then operates to facilitate the injection of magnetic fluid particles into the core sample to be tested, and guides the magnetic fluid particles to flow inside the core sample to be tested through the formed magnetic field control, and tests the core under the condition of periodic application of physical mechanical force on the external circumference;

[0022] S3. Secondly, with the cooperation of the porosity dynamic detection component, the pores formed by the injected magnetic fluid particles in the core sample to be tested are marked, and the fed-back pore data are detected and analyzed;

[0023] S4. Then, during the test, the high temperature and high pressure regulator is started, and the test data formed is recorded and analyzed using the detection box controller and the PLC controller, and the temperature and pressure during the test are actively adjusted to improve the test accuracy.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the present invention, with the cooperation of the core detection auxiliary component, when the core sample to be tested is placed on the rotating table plate, the main rotating motor is started, and the rotating table plate and the core sample to be tested are driven by the main rotating motor to rotate at a uniform speed. Secondly, the magnetic fluid particles are injected into the core sample to be tested by using the high-pressure pump injector and the injection core end, and under the cooperation of the centrifugal force of uniform rotation, it is ensured that the magnetic fluid particles are evenly distributed in the pores of the core sample to be tested. Then, the first hydraulic cylinder and the second hydraulic cylinder form an external magnetic field through the matrix permanent magnet group, and cooperate with the electromagnetic coil control structure connected to the external sleeve of the side end of the vibration cylinder, so that the matrix permanent magnet group can be used to provide a basic magnetic field, and the electromagnetic coil control structure can be fine-tuned to achieve more precise magnetic field control, thereby forming coordinated control and realizing comprehensive control of the magnetic field, so that the formed external magnetic field guides the magnetic fluid particles to form controllable and flexible magnetic fields in the core sample to be tested. The activity is distributed so that the distribution of magnetic fluid particles in the core can actively adjust the magnetic field strength according to the needs. Then the vibrating cylinder applies vibration to the outer circumference of the core sample to be tested through the flexible vibration guide rod to simulate the vibration effect in the underground environment. At the same time, the first hydraulic cylinder and the second hydraulic cylinder apply physical mechanical force to the outer circumference of the core through the detection pressure piece to simulate the stress change in the underground environment. Then the main rotating motor continues to drive the rotation of the core through the rotating table plate to ensure the position adjustment of the core sample to be tested during the test. Then the driving linear rail drives the sliding seat to slide through the position sliding vertical guide rail to adjust the position of the neutron detector to ensure the accuracy of the detection. The neutron detector evaluates the porosity by detecting the neutron signal in the core, thereby improving the performance and reliability of the core porosity testing device during actual use, ensuring the accuracy and reliability of the test results, and improving the test efficiency.

[0026] 2. In the present invention, with the cooperation of the porosity dynamic detection component and the control instruction of the PLC controller, the sliding position adjustment block drives the hinge vertical guide rail and the structure it carries to adjust the position in the horizontal direction through the transverse linear rail, and the sliding angle adjustment structure drives the main frame to adjust the position in the vertical direction through the hinge vertical guide rail. Then, the driving angle motor is started to drive the main frame to adjust the angle through two bevel gears, so that the main frame can drive the related structures it carries to adjust. Then, the three-section electric driving arm is started to drive the electric telescopic rod to adjust the telescopic adjustment through the first rotating joint and the second rotating joint. At the same time, with the cooperation of the electric telescopic rod, the electric rotating ball joint, the rotating angle gyroscope and related structures are driven to form multi-directional adjustment to ensure The X-ray scanning end can approach or move away from the core sample to be tested, and then the electric rotating ball joint is started to drive the rotation angle gyroscope for rotation adjustment. The rotation angle is measured by the rotation angle gyroscope to ensure that the X-ray scanning end can scan from different angles, and the data is fed back to the PLC controller. Then the X-ray scanning end is started, and the semi-annular toothed guide frame drives the X-ray scanning end to move along the guide track, and the core sample to be tested is X-ray scanned to obtain the internal structure information of the core sample to be tested, and the X-ray scanning data is transmitted to the data processing result in the PLC controller for processing and analysis, and a detailed core porosity report is generated, thereby cooperating with the operation of the above-mentioned core detection auxiliary components to effectively improve the accuracy of rock porosity testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the main structure of a core porosity testing device of the present invention;

[0028] Figure 2 It is a schematic structural diagram of a side view of a core porosity testing device of the present invention;

[0029] Figure 3 It is a schematic diagram of the installation position structure of a core detection auxiliary component and a porosity dynamic detection component in a core porosity testing device of the present invention;

[0030] Figure 4 It is a partial structural schematic diagram of a porosity dynamic detection component in a core porosity testing device of the present invention;

[0031] Figure 5 It is a structural schematic diagram of a porosity dynamic detection component in a core porosity testing device of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a core detection auxiliary component in a core porosity testing device of the present invention;

[0033] Figure 7It is a structural schematic diagram of another angle of a core detection auxiliary component in a core porosity testing device of the present invention;

[0034] Figure 8 A core porosity testing device according to the present invention Figure 7 A schematic diagram of the enlarged structure at B;

[0035] Fig. 9 A core porosity testing device according to the present invention Figure 4 A is an enlarged structural diagram of FIG.

[0036] In the figure: 1, side frame table; 2, guide conveyor belt structure; 3, PLC controller; 4, detection box controller; 5, test box; 6, high temperature and high pressure regulator; 7, pneumatic sealing structure; 8, core detection auxiliary components; 81, main rotating motor; 82, rotating table plate; 83, side connection frame; 84, first hydraulic cylinder; 85, vibration cylinder; 86, electromagnetic coil control structure; 87, flexible vibration guide rod; 88, second hydraulic cylinder; 89, support frame; 890, horizontal adjustment guide rail frame; 891, driving line rail; 892, position sliding vertical guide rail; 893, sliding seat; 894. Positioning seat; 895. Neutron detector; 896. High-pressure pump injector; 897. Injection core end; 898. Detection pressure piece; 899. Matrix permanent magnet group; 9. Porosity dynamic detection component; 91. Horizontal linear rail; 92. Sliding position adjustment block; 93. Hinge vertical guide rail; 94. Sliding angle adjustment structure; 95. Main frame; 96. Electric telescopic rod; 97. Three-section electric drive arm; 98. Second rotating section; 99. Bracket; 990. Electric rotating ball joint; 991. Rotation angle gyroscope; 992. Semi-ring toothed guide frame; 993. X-ray scanning end. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the present invention, reference is made to Figure 1-Figure 9 As shown: A core porosity testing device, comprising:

[0039] A high temperature and high pressure regulator 6, which is installed on the top of the test box 5, and is used to form a dynamic high temperature and high pressure environment to simulate the impact of the core under formation conditions;

[0040] The porosity dynamic detection component 9 is installed at the top of the inner part of the test box 5, and is used to form a multi-directional adjustment around the core sample to be tested, so as to mark the pores formed by the injected magnetic fluid particles in the core sample to be tested, and detect and analyze the fed-back pore data;

[0041] The core detection auxiliary component 8 is installed on the surface of the side frame table 1, and is used to inject magnetic fluid particles into the core sample to be tested, and guide the magnetic fluid particles to flow inside the core sample to be tested through the control of the magnetic field formed, and test the core under the condition of periodic application of physical mechanical force on the external circumference.

[0042] In the present invention, according to Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, the core detection auxiliary component 8 includes:

[0043] The main rotating motor 81, the rotating table disk 82, the side connection frame 83, the first hydraulic cylinder 84 and the second hydraulic cylinder 88, the main rotating motor 81 is located at the bottom of the center end of the rotating table disk 82 and is connected, the side connection frame 83 drives the first hydraulic cylinder 84 to be fastened to the side surface of the bottom base of the rotating table disk 82, the second hydraulic cylinder 88 is located on the top wall surface of the bottom base of the rotating table disk 82, the sides of the first hydraulic cylinder 84 and the second hydraulic cylinder 88 are both installed with matrix permanent magnet groups 899, the output ends of the first hydraulic cylinder 84 and the second hydraulic cylinder 88 are both installed with detection pressure pieces 898, the top side surface of the bottom base of the rotating table disk 82 is fastened with a vibration cylinder 85, the side end of the vibration cylinder 85 is externally sleeved with an electromagnetic coil control structure 86, and the output end of the vibration cylinder 85 is connected with a flexible vibration guide rod 87.

[0044] A support frame 89 is fastened to the bottom base surface of the rotating table plate 82, and a transverse adjustment guide frame 890 is installed on the top side of the support frame 89. The transverse adjustment guide frame 890 is used to drive an external grabbing robot arm to perform sliding adjustment. A driving linear rail 891 is fastened to the other side of the top of the support frame 89. The internal sliding connection of the driving linear rail 891 is a position sliding vertical guide rail 892, and the internal sliding connection of the position sliding vertical guide rail 892 is a sliding seat 893.

[0045] The bottom of the sliding seat 893 is connected to a positioning seat 894, and a neutron detector 895 is installed on the side end of the positioning seat 894. The top of the bottom base of the rotating table plate 82 is fastened with a high-pressure pump injector 896, and the bottom end of the high-pressure pump injector 896 is installed with an injection core end 897.

[0046] In a specific scheme, firstly, the core sample to be tested is placed on the rotating table plate 82 by using an external grabbing mechanical arm, and then the main rotating motor 81 is started, and the rotating table plate 82 and the core sample to be tested are driven by the main rotating motor 81 to rotate at a uniform speed. Secondly, the magnetic fluid particles are injected into the core sample to be tested by using the high-pressure pump injector 896 and the injection core end 897, and under the centrifugal cooperation of uniform rotation, it is ensured that the magnetic fluid particles are evenly distributed in the pores of the core sample to be tested. Then, the first hydraulic cylinder 84 and the second hydraulic cylinder 88 form an external magnetic field through the matrix permanent magnet group 899, and cooperate with the electromagnetic coil control structure 86 connected to the external sleeve of the side end of the vibration cylinder 85, so that the matrix permanent magnet group 899 can be used to provide a basic magnetic field, and the electromagnetic coil control structure 86 can be used for fine-tuning to achieve more precise magnetic field control, thereby forming coordinated control and realizing comprehensive control of the magnetic field, so that the formed external magnetic field guides the magnetic fluid particles to form controllable and flexible magnetic fields in the core sample to be tested. The activity is distributed so that the distribution of magnetic fluid particles in the core can actively adjust the magnetic field strength according to the needs. Then the vibration cylinder 85 applies vibration to the outer circumference of the core sample to be tested through the flexible vibration guide rod 87 to simulate the vibration effect in the underground environment. At the same time, the first hydraulic cylinder 84 and the second hydraulic cylinder 88 apply physical mechanical force to the outer circumference of the core through the detection pressure piece 898 to simulate the stress change in the underground environment. Then, the main rotating motor 81 continues to drive the rotation of the core through the rotating table plate 82 to ensure the position adjustment of the core sample to be tested during the test. Then the driving linear rail 891 drives the sliding seat 893 to slide through the position sliding vertical guide rail 892 to adjust the position of the neutron detector 895 to ensure the accuracy of the detection. The neutron detector 895 evaluates the porosity by detecting the neutron signal in the core, thereby improving the performance and reliability of the core porosity testing device during actual use, ensuring the accuracy and reliability of the test results, and improving the test efficiency.

[0047] In the present invention, according to Figure 2-Figure 5 and Fig. 9 As shown, the porosity dynamic detection component 9 includes:

[0048] A transverse linear rail 91, a sliding position adjustment block 92, a hinge vertical guide rail 93 and a sliding angle adjustment structure 94. The transverse linear rail 91 is fastened to the internal top side of the test box 5. The sliding position adjustment block 92 is located at the bottom end of the transverse linear rail 91 and is slidably connected to the hinge vertical guide rail 93 and the structure it carries for adjustment. The sliding angle adjustment structure 94 is located at the side guide of the hinge vertical guide rail 93 and is slidably connected to the hinge vertical guide rail 93. The bottom of the sliding angle adjustment structure 94 is connected to a main frame 95. The sliding angle adjustment structure 94 consists of a sliding saddle, a driving angle motor and two bevel gears, which are used to drive the main frame 95 and the structure it carries for adjustment.

[0049] A three-section electric drive arm 97 is hinged at the bottom end of the main frame 95, a first rotating joint is hinged at the top end of the side of the three-section electric drive arm 97, an electric telescopic rod 96 is hinged at the bottom of the first rotating joint, the first rotating joint is used to connect the bottom end of the main frame 95, the top of the side of the three-section electric drive arm 97 and the top of the electric telescopic rod 96, a second rotating joint 98 is hinged at the bottom end of the side of the three-section electric drive arm 97, the second rotating joint 98 is used to connect the bottom of the side of the three-section electric drive arm 97 and the bottom of the electric telescopic rod 96.

[0050] A bracket 99 is connected to the side of the second rotating joint 98, and an electric rotating ball joint 990 is installed on the side end of the bracket 99. A rotation angle gyroscope 991 is connected to the side end of the electric rotating ball joint 990. The side end of the rotation angle gyroscope 991 is fastened with a semi-annular toothed guide frame 992, and an X-ray scanning end 993 is slidably connected inside the side end of the semi-annular toothed guide frame 992.

[0051] In a specific scheme, when the core detection auxiliary component 8 is operating, synchronously under the control instruction of the PLC controller 3, the sliding position adjustment block 92 drives the hinged vertical guide rail 93 and the structure it carries to adjust the position in the horizontal direction through the transverse linear rail 91, and the sliding angle adjustment structure 94 drives the main frame 95 to adjust the position in the vertical direction through the hinged vertical guide rail 93. Then, the driving angle motor is started to drive the main frame 95 to adjust the angle through two bevel gears, so that the main frame 95 can drive the related structures it carries to adjust. Then, the three-section electric driving arm 97 is started to drive the electric telescopic rod 96 to adjust the telescopic adjustment through the first rotating joint and the second rotating joint 98, and at the same time, with the cooperation of the electric telescopic rod 96, the electric rotating ball joint 990, the rotating angle gyroscope 991 and related structures are driven to form a multi-directional Adjust to ensure that the X-ray scanning end 993 can be close to or away from the core sample to be tested, then start the electric rotating ball joint 990 to drive the rotating angle gyroscope 991 to rotate and adjust, use the rotating angle gyroscope 991 to measure the rotation angle, ensure that the X-ray scanning end 993 can scan from different angles, and feed back the data to the PLC controller 3, then start the X-ray scanning end 993, and drive the X-ray scanning end 993 to move along the guide track through the semi-annular toothed guide frame 992, perform X-ray scanning on the core sample to be tested, obtain the internal structure information of the core sample to be tested, and transmit the X-ray scanning data to the data processing result in the PLC controller 3 for processing and analysis, generate a detailed core porosity report, and then cooperate with the operation of the above-mentioned core detection auxiliary component 8 to effectively improve the accuracy of rock porosity testing.

[0052] In the present invention, according to Figure 1 and Figure 2 As shown, a guide conveyor belt structure 2 is installed on the side of the side frame table 1, the bottom of the side frame table 1 is supported and fixed by a supporting frame, and a PLC controller 3 and a detection box controller 4 are installed on the bottom end of the side frame table 1.

[0053] Pneumatic sealing structures 7 are installed on both the left and right sides of the test box 5. The pneumatic sealing structure 7 is used to seal the test box 5 when performing a porosity test on a core.

[0054] In a specific scheme, with the cooperation of the PLC controller 3 and the detection box controller 4, the high-temperature and high-pressure regulator 6 forms high-temperature and high-pressure conditions simulating the underground environment inside the test box 5 through the heating element and the pressure regulating device. At the same time, through dynamic adjustment, it is ensured that the pressure and temperature of the core sample to be tested in the high-temperature and high-pressure environment are close to the actual geological conditions, thereby ensuring the accuracy of the test. The setting of the pneumatic sealing structure 7 is used to seal the test box 5 during the porosity test of the core, that is, before the test, it is in an open state. When the core sample to be tested is placed on the rotating table plate 82 by an external grabbing robot arm, the pneumatic sealing structure 7 is closed to reduce the influence of external links on the test, and the guide conveyor belt structure 2 facilitates the delivery of the tested core to the subsequent processing area.

[0055] The wiring diagram of the PLC controller 3, detection box controller 4, high temperature and high pressure regulator 6, main rotating motor 81, neutron detector 895, high pressure pump injector 896 and X-ray scanning end 993 in the present invention belongs to the common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the PLC controller 3, detection box controller 4, high temperature and high pressure regulator 6, main rotating motor 81, neutron detector 895, high pressure pump injector 896 and X-ray scanning end 993 will no longer be explained in detail.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A core porosity testing device, Features include: A high temperature and high pressure regulator (6), which is installed on the top of the test box (5) and is used to form a dynamic high temperature and high pressure environment to simulate the impact of the core under formation conditions; A porosity dynamic detection component (9) is installed at the top of the inner part of the test box (5) and is used to form a multi-directional adjustment on the periphery of the core sample to be tested, thereby marking the pores formed by the injected magnetic fluid particles in the core sample to be tested, and detecting and analyzing the fed-back pore data; A core detection auxiliary component (8) is mounted on the side frame table (1) and is used to inject magnetic fluid particles into the core sample to be tested, and guide the magnetic fluid particles to flow inside the core sample to be tested through the control of the magnetic field formed, and to test the core while applying physical mechanical force on the outer peripheral side in stages; The porosity dynamic detection component (9) comprises: A transverse linear rail (91), a sliding position adjustment block (92), a hinge vertical guide rail (93) and a sliding angle adjustment structure (94), wherein the transverse linear rail (91) is fastened to the inner top side of the test box (5), the sliding position adjustment block (92) is located inside the bottom end of the transverse linear rail (91) for sliding connection, and drives the hinge vertical guide rail (93) and the structure carried by it to be adjusted, the sliding angle adjustment structure (94) is located inside the side guide rail of the hinge vertical guide rail (93) for sliding connection, the bottom of the sliding angle adjustment structure (94) is connected to a main frame (95), and the sliding angle adjustment structure (94) is composed of a sliding saddle, a driving angle motor and two bevel gears, and is used to drive the main frame (95) and the structure carried by it to be adjusted; The bottom end of the main frame (95) is hinged with a three-section electric drive arm (97); the top end of the side of the three-section electric drive arm (97) is hinged with a first rotating joint; the bottom of the first rotating joint is hinged with an electric telescopic rod (96); the first rotating joint is used to connect the bottom end of the main frame (95), the top of the side of the three-section electric drive arm (97) and the top of the electric telescopic rod (96); the bottom end of the side of the three-section electric drive arm (97) is hinged with a second rotating joint (98); the second rotating joint (98) is used to connect the bottom of the side of the three-section electric drive arm (97) and the bottom of the electric telescopic rod (96); A bracket (99) is connected to the side of the second rotating joint (98), an electric rotating ball joint (990) is installed on the side end of the bracket (99), a rotation angle gyroscope (991) is connected to the side end of the electric rotating ball joint (990), a semi-ring toothed groove guide rail frame (992) is fixedly connected to the side end of the rotation angle gyroscope (991), and an X-ray scanning end (993) is slidably connected to the inside of the side end of the semi-ring toothed groove guide rail frame (992); The core detection auxiliary component (8) comprises: A main rotating motor (81), a rotating table plate (82), a side connection frame (83), a first hydraulic cylinder (84) and a second hydraulic cylinder (88), wherein the main rotating motor (81) is connected to the bottom of the central end of the rotating table plate (82), the side connection frame (83) drives the first hydraulic cylinder (84) to be connected to the side surface of the bottom base of the rotating table plate (82), the second hydraulic cylinder (88) is located on the top wall surface of the bottom base of the rotating table plate (82), and the first hydraulic cylinder (84) is connected to the rotating table plate (82). 84) and the side of the second hydraulic cylinder (88) are both installed with a matrix permanent magnet group (899), the output ends of the first hydraulic cylinder (84) and the second hydraulic cylinder (88) are both installed with a detection pressure piece (898), a vibration cylinder (85) is fastened to the top side surface of the bottom base of the rotating table plate (82), an electromagnetic coil control structure (86) is sleeved and connected to the side end of the vibration cylinder (85), and a flexible vibration guide rod (87) is connected to the output end of the vibration cylinder (85); A support frame (89) is fastened to the bottom base surface of the rotating table plate (82); a lateral adjustment guide frame (890) is installed on the top side of the support frame (89); the lateral adjustment guide frame (890) is used to drive an external grabbing mechanical arm to perform sliding adjustment; a driving linear rail (891) is fastened to the other side of the top of the support frame (89); the driving linear rail (891) is internally slidably connected to a position sliding vertical guide rail (892); the position sliding vertical guide rail (892) is internally slidably connected to a sliding seat (893); The bottom of the sliding seat (893) is connected to a positioning seat (894), and a neutron detector (895) is installed on the side end of the positioning seat (894). The top of the bottom base of the movable table plate (82) is fastened with a high-pressure pump injector (896), and the bottom end of the high-pressure pump injector (896) is installed with an injection core end (897).

2. The core porosity testing device according to claim 1, characterized in that: A guide conveyor belt structure (2) is installed on the side of the side frame table (1), the bottom of the side frame table (1) is supported and fixed by a support frame, and a PLC controller (3) and a detection box controller (4) are respectively installed at the bottom end of the side frame table (1).

3. The core porosity testing device according to claim 2, characterized in that: Pneumatic sealing structures (7) are installed on both the left and right sides of the test box (5), and the pneumatic sealing structure (7) is used to seal the test box (5) when performing a core porosity test.

4. A testing method for a core porosity testing device, characterized in that: The core porosity testing device according to claim 3 is used, comprising the following steps: S1. First, the pneumatic sealing structure (7) is in an open state, and then the core sample to be tested is placed on the rotating table plate (82) using an external grabbing mechanical arm, and the pneumatic sealing structure (7) is closed; S2, the core detection auxiliary component (8) then operates to facilitate the injection of magnetic fluid particles into the core sample to be tested, and guides the magnetic fluid particles to flow inside the core sample to be tested through the control of the magnetic field, and tests the core while applying physical mechanical force on the outer peripheral side in stages; S3. Secondly, in cooperation with the porosity dynamic detection component (9), the pores formed by the injected magnetic fluid particles in the core sample to be tested are marked, and the fed-back pore data are detected and analyzed; S4. Then, during the test, the high temperature and high pressure regulator (6) is started, and the test box controller (4) and the PLC controller (3) are used to record and analyze the generated test data, and the temperature and pressure during the test are actively adjusted to improve the test accuracy.

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