Method for representing pressurized imbibition by combining appearance and microcosmic structure

Abstract

The invention discloses a method for representing pressurized imbibition by combining appearance and microcosmic characteristics, and relates to the technical field of rock core testing. The method comprises the steps of S1, apparent imbibition, S2, microscopic imbibition, S3, absorption liquid position observation, S4, imbibition change analysis and S5, imbibition change comparison. In the invention, apparent imbibition and microscopic imbibition are carried out on the measured rock core through S1 to S5, and the imbibition results of apparent imbibition and microscopic imbibition are analyzed and compared, so that the accuracy of the rock core pressurized imbibition experiment result is improved, and accurate data support is provided for the fields of underground water treatment and restoration, oil and gas resource development and the like; the material taking mechanism controls the placing cylinder to enter the sealed container or be separated from the sealed container, so that an experimenter can conveniently place a to-be-tested rock core into the sealed container and can conveniently take out the tested rock core from the sealed container, the convenience of a rock core pressurization imbibition experiment is improved, and the working intensity of the experimenter is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of core testing, in particular to a method for characterizing pressurized imbibition by combining appearance and microscopic properties. Background Art

[0002] Imbibition commonly occurs in nature and engineering applications, such as rainwater infiltration into soil, biomedicine preparation, new material design, soil and groundwater remediation, oil and gas resource extraction, and carbon dioxide geological storage;

[0003] Imbibition occurs in porous media and is an effective method for extracting crude oil from matrix rock blocks and low-permeability layers. Imbibition is also called self-imbibition, or spontaneous imbibition, which refers to the process in which water is automatically absorbed into the core and drives out crude oil without pressure.

[0004] However, the existing technology still has some defects when conducting pressure imbibition experiments on cores:

[0005] 1. In the existing technology, when conducting a core pressure imbibition test, the core pressure imbibition is mostly completed in an apparent manner. Since the pressure imbibition method is single, it is impossible to compare the pressure imbibition results of multiple methods, which leads to low accuracy of the core pressure imbibition test results.

[0006] 2. At the same time, the existing core pressurization imbibition test equipment has a relatively single function, and it is very inconvenient to take the core during the experiment. In addition, the existing core pressurization imbibition test equipment cannot simulate the imbibition of the core under vibration, thereby affecting the accuracy of the experimental results.

[0007] In view of the above problems, the inventors proposed a method for combining superficial and microscopic characterization of pressurized imbibition to solve the above problems. Summary of the invention

[0008] In order to solve the above problems, the purpose of the present invention is to provide a method for characterizing pressurized imbibition by combining appearance and microscopic properties.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solution: a method for characterizing pressurized imbibition by combining appearance and microscopic properties, comprising the following steps:

[0010] S1. Apparent imbibition

[0011] The core to be tested is pressurized by the pressurized imbibition equipment to allow liquid to enter the core to be tested, and a graph of the change in the imbibition water quality is made;

[0012] S2. Microscopic imbibition

[0013] Carry out NMR experiments on the measured cores. When measuring a group of water absorption, do a group of one-dimensional NMR;

[0014] S3. Observation of the absorption liquid position

[0015] A set of two-dimensional nuclear magnetic resonance images was performed at the beginning and after the imbibition of the core to understand the location of the absorbed liquid before and after the imbibition.

[0016] S4. Analysis of imbibition changes

[0017] On the core one-dimensional NMR image, the horizontal axis relaxation time is divided into three sections, and the areas formed by different sections and curves are calculated by calculus. The NMR images at different times are divided into three area change diagrams at different imbibition times and a total area change diagram.

[0018] S5. Comparison of changes in imbibition

[0019] Take the area change graph and total area change graph corresponding to the leftmost time period in S4, and their correspondence with the water absorption mass change graph in S1.

[0020] Preferably, the pressurizing device comprises a base table, a magnetic stirrer, a sealed container, a sealing cover, a pressure control valve and a placement cylinder, wherein the magnetic stirrer is mounted on the upper surface of the base table, the sealed container is mounted on the magnetic stirrer, the sealing cover is arranged at the open end of the sealed container, the pressure control valve is mounted on the sealing cover, and the placement cylinder is arranged in the sealed container;

[0021] A frame plate is fixedly mounted on the upper surface of the base platform, a material taking mechanism is arranged between the frame plate and the sealing cover, and a vibration mechanism is arranged between the sealing cover and the placing cylinder.

[0022] Preferably, a first sealing ring is fixedly mounted on the outer wall of the sealing cover, a second sealing ring is fixedly mounted on the open end of the sealing container, the outer wall of the first sealing ring is in movable contact with the inner wall of the second sealing ring, and a plurality of flow holes distributed in a ring array are opened on the bottom wall of the placement cylinder.

[0023] Preferably, the material picking mechanism includes a push-pull rod, a hinge seat is fixedly installed on the upper surface of the sealing cover, one end of the push-pull rod is hinged to the hinge seat, a first motor is fixedly installed at one end of the frame plate, a first rotating rod is fixedly installed at the driving output end of the first motor, a driving handle is fixedly installed at one end of the first rotating rod, a connecting shaft is fixedly installed at one end of the driving handle, and one end of the connecting shaft is rotatably connected to the other end of the push-pull rod.

[0024] Preferably, a first guide groove is opened at one end of the frame plate, a first guide block is slidably mounted on the inner wall of the first guide groove, a fixing plate is fixedly connected to one side of the first guide block, and one end of the fixing plate is fixedly connected to the outer wall of the sealing cover.

[0025] Preferably, the vibration mechanism includes a fixing rod, one end of which is fixedly connected to the lower surface of the sealing cover, the other end of which is fixedly mounted with a U-shaped frame, both sides of the U-shaped frame are slidably provided with connecting plates, one end of the two connecting plates is fixedly connected to the open end of the placement cylinder, both sides of the U-shaped frame are fixedly mounted with spring rods, the other ends of the two connecting plates are fixedly mounted with a lifting frame, and the piston ends of the two spring rods are fixedly connected to the end of the lifting frame.

[0026] Preferably, two second guide grooves are provided on both sides of the U-shaped frame, and second guide blocks are slidably mounted on the inner walls of the second guide grooves, wherein opposite sides of two adjacent second guide blocks are fixedly connected to the other end of a connecting plate.

[0027] Preferably, a fixing frame is fixedly installed in the middle of the U-shaped frame, a rotating shaft is rotatably installed at one end of the fixing frame, cams are fixedly installed at both ends of the rotating shaft, and arc seats are fixedly installed at both ends of the lifting frame, and one of the cams and one of the arc seats correspond vertically.

[0028] Preferably, a second motor is fixedly mounted on the other end of the fixed frame, a second rotating rod is fixedly mounted on the driving output end of the second motor, bevel gears are fixedly mounted on one end of the second rotating rod and the middle of the rotating shaft, and the two bevel gears are meshed with each other.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the present invention, the apparent imbibition and microscopic imbibition of the measured core are carried out through S1-S5, and the imbibition results of the apparent imbibition and microscopic imbibition are analyzed and compared, thereby improving the accuracy of the core pressurized imbibition test results, and providing accurate data support for the fields of groundwater treatment and restoration and oil and gas resource development;

[0031] 2. In the present invention, the material taking mechanism controls the placing tube to enter or detach from the sealed container, which is convenient for the experimenter to put the core to be tested into the sealed container, and at the same time, it is convenient for the experimenter to take out the tested core from the sealed container, thereby improving the convenience of the core pressure imbibition experiment and reducing the work intensity of the experimenter;

[0032] 3. In the present invention, the placement tube in the sealed container is driven to rise and fall back and forth by a vibration mechanism. The reciprocating rise and fall of the placement tube causes the core to vibrate, simulating the imbibition of the core under vibration conditions, so that the core is fully in contact with the imbibition solution in the sealed container, further improving the accuracy of the core pressurized imbibition test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 The present invention is a flow chart of a method for combining superficial and microscopic characterization of pressurized imbibition.

[0035] Figure 2 This is a nuclear magnetic resonance image of the core imbibition time of an embodiment of the present invention.

[0036] Figure 3 Schematic diagram of core water absorption in an embodiment of the present invention.

[0037] Figure 4 It is a schematic structural diagram of the pressurized imbibition equipment of the present invention.

[0038] Figure 5 Another schematic diagram of the structure of the pressurized imbibition equipment of the present invention.

[0039] Figure 6 It is a schematic diagram of the connection structure between the material taking mechanism and the vibration mechanism and the sealing cover and the placing cylinder of the present invention.

[0040] Figure 7 It is a schematic diagram of the connection structure between the vibration mechanism, the sealing cover and the placement cylinder of the present invention.

[0041] Figure 8 It is a schematic diagram of the connection structure between the vibration mechanism and the placement tube of the present invention.

[0042] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of part A in FIG.

[0043] In the figure: 1, base platform; 11, frame plate; 2, magnetic stirrer; 3, sealed container; 31, sealing cover; 32, first sealing ring; 33, second sealing ring; 34, pressure control valve; 4, placement cylinder; 41, flow hole; 5, material taking mechanism; 51, push-pull rod; 52, hinged seat; 53, first guide groove; 54, first guide block; 55, fixed plate; 56, first motor; 57, first rotating rod; 58, driving handle; 59, connecting shaft; 6, vibration mechanism; 61, fixed rod; 62, U-shaped frame; 63, connecting plate; 64, second guide groove; 65, second guide block; 66, spring rod; 67, lifting frame; 68, fixed frame; 69, rotating shaft; 7, cam; 71, arc seat; 72, second motor; 73, second rotating rod; 74, bevel gear. DETAILED DESCRIPTION

[0044] 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 described embodiments 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.

[0045] Example: Figure 1-9 As shown, the present invention provides a method for characterizing pressurized imbibition by combining appearance and microscopic properties, comprising the following steps:

[0046] S1. Apparent imbibition

[0047] The core to be tested is pressurized by the pressurized imbibition equipment to allow liquid to enter the core to be tested, and a graph of the change in the imbibition water quality is made;

[0048] S2. Microscopic imbibition

[0049] Carry out NMR experiments on the measured cores. When measuring a group of water absorption, do a group of one-dimensional NMR;

[0050] S3. Observation of the absorption liquid position

[0051] A set of two-dimensional nuclear magnetic resonance images was performed at the beginning and after the imbibition of the core to understand the location of the absorbed liquid before and after the imbibition.

[0052] S4. Analysis of imbibition changes

[0053] On the core one-dimensional NMR image, the horizontal axis relaxation time is divided into three sections, and the areas formed by different sections and curves are calculated by calculus. The NMR images at different times are divided into three area change diagrams at different imbibition times and a total area change diagram.

[0054] S5. Comparison of changes in imbibition

[0055] Take the area change graph and total area change graph corresponding to the leftmost time period in S4, and their correspondence with the water absorption mass change graph in S1.

[0056] The pressurizing device includes a base platform 1, a magnetic stirrer 2, a sealed container 3, a sealing cover 31, a pressure control valve 34 and a placement tube 4. The magnetic stirrer 2 is mounted on the upper surface of the base platform 1, the sealed container 3 is mounted on the magnetic stirrer 2, the sealing cover 31 is arranged at the open end of the sealed container 3, the pressure control valve 34 is mounted on the sealing cover 31, and the placement tube 4 is arranged in the sealed container 3. During the core pressurized imbibition process, the core is placed in the placement tube 4, the imbibition solution is stored in the sealed container 3, the sealing cover 31 seals the open end of the sealed container 3, the pipeline of the pressure control valve 34 is connected to the external pressurized tank, and controls the pressure in the sealed container 3. The magnetic stirrer 2 drives the stirrer to rotate through the action of the magnetic field to pressurize the imbibition solution in the sealed container 3. Stirring is performed, a first sealing ring 32 is fixedly installed on the outer wall of the sealing cover 31, and a second sealing ring 33 is fixedly installed on the open end of the sealing container 3, and the outer wall of the first sealing ring 32 and the inner wall of the second sealing ring 33 are in movable contact. By setting the first sealing ring 32 and the second sealing ring 33, the first sealing ring 32 and the second sealing ring 33 can improve the sealing between the sealing cover 31 and the sealing container 3, and a plurality of flow holes 41 distributed in an annular array are opened on the bottom wall of the placing tube 4. By setting the flow holes 41, when the placing tube 4 enters the interior of the sealing container 3, the imbibed solution in the sealing container 3 contacts the core in the placing tube 4 through the flow holes 41, and when the placing tube 4 rises, the imbibed solution in the placing tube 4 flows downward into the sealing container 3 through the flow holes 41;

[0057] A frame plate 11 is fixedly installed on the upper surface of the base platform 1, and a material taking mechanism 5 is provided between the frame plate 11 and the sealing cover 31, and a vibration mechanism 6 is provided between the sealing cover 31 and the placing tube 4. By providing the material taking mechanism 5, the material taking mechanism 5 can conveniently realize the rising or falling of the sealing cover 31 and the placing tube 4, so that the core enters the sealed container 3 or is separated from the sealed container 3, which is convenient for the experimenter to operate and reduces the work intensity of the experiment. By providing the vibration mechanism 6, the vibration mechanism 6 can vibrate the placing tube 4, so that the core is fully in contact with the imbibition solution in the sealed container 3.

[0058] The material taking mechanism 5 includes a push-pull rod 51, and a hinge seat 52 is fixedly installed on the upper surface of the sealing cover 31. One end of the push-pull rod 51 is hinged to the hinge seat 52. By driving the push-pull rod 51 to reciprocate in the vertical direction, the push-pull rod 51 can make the sealing cover 31 reciprocate and rise and fall through the hinge seat 52. A first motor 56 is fixedly installed at one end of the frame plate 11, and a first rotating rod 57 is fixedly installed at the driving output end of the first motor 56. A driving handle 58 is fixedly installed at one end of the first rotating rod 57, and a connecting shaft 59 is fixedly installed at one end of the driving handle 58. One end of the connecting shaft 59 is rotatably connected to the other end of the push-pull rod 51. By turning on the first motor 56, the driving shaft of the first motor 56 can rotate the first rotating rod 57. A rotating rod 57 can make the driving handle 58 and the connecting shaft 59 revolve around the axis of the first rotating rod 57, and the connecting shaft 59 can make the push-pull rod 51 reciprocate. A first guide groove 53 is opened at one end of the frame plate 11, and a first guide block 54 is slidably installed on the inner wall of the first guide groove 53. A fixing plate 55 is fixedly connected to one side of the first guide block 54, and one end of the fixing plate 55 is fixedly connected to the outer wall of the sealing cover 31. By setting the first guide groove 53, the first guide block 54 and the fixing plate 55, the first guide block 54 can slide in the vertical direction along the inner wall of the first guide groove 53, so that the sealing cover 31 is guided in the vertical direction through the fixing plate 55, so that the sealing cover 31 can keep rising and falling in the vertical direction.

[0059] The vibration mechanism 6 includes a fixing rod 61, one end of which is fixedly connected to the lower surface of the sealing cover 31, and a U-shaped frame 62 is fixedly installed on the other end of the fixing rod 61. Connecting plates 63 are slidably provided on both sides of the U-shaped frame 62. One end of the two connecting plates 63 is fixedly connected to the open end of the placement tube 4. Two second guide grooves 64 are provided on both sides of the U-shaped frame 62. Second guide blocks 65 are slidably installed on the inner wall of the second guide groove 64, wherein the opposite sides of two adjacent second guide blocks 65 are fixedly connected to the other end of a connecting plate 63. By setting the second guide groove 64 4 and a second guide block 65, the second guide block 65 can slide in the vertical direction along the inner wall of the second guide groove 64, the second guide block 65 can guide the connecting plate 63 in the vertical direction, so that the connecting plate 63 can keep the vertical lifting, both sides of the U-shaped frame 62 are fixedly installed with spring rods 66, the other ends of the two connecting plates 63 are fixedly installed with lifting frames 67, the piston ends of the two spring rods 66 and the ends of the lifting frames 67 are fixedly connected, by setting the spring rods 66, when the lifting frames 67 are driven to rise, the lifting frames 67 make the placement cylinder 4 rise synchronously through the connecting plate 63 The lifting frame 67 can shrink the spring rod 66. When the lifting frame 67 stops driving, the tube 4, the connecting plate 63 and the lifting frame 67 are vertically lowered, and the spring rod 66 is extended and reset. A fixing frame 68 is fixedly installed in the middle of the U-shaped frame 62. A rotating shaft 69 is rotatably installed at one end of the fixing frame 68. Cams 7 are fixedly installed at both ends of the rotating shaft 69. Arc seats 71 are fixedly installed at both ends of the lifting frame 67. One cam 7 and one arc seat 71 correspond vertically. By driving the rotating shaft 69 to rotate, the rotating shaft 69 can rotate the cam 7. When the raised portion contacts the arc surface of the arc seat 71, the arc seat 71 can push the lifting frame 67 to rise vertically. The other end of the fixed frame 68 is fixedly installed with a second motor 72, and the driving output end of the second motor 72 is fixedly installed with a second rotating rod 73. One end of the second rotating rod 73 and the middle part of the rotating shaft 69 are fixedly installed with a bevel gear 74. The two bevel gears 74 are meshed with each other. By turning on the second motor 72, the driving shaft of the second motor 72 can rotate the second rotating rod 73, and the second rotating rod 73 can rotate the rotating shaft 69 through the two bevel gears 74.

[0060] Working principle: When it is necessary to conduct a pressurized imbibition experiment on the core to be tested, the experimenter first fills the imbibition solution into the sealed container 3 (the sealing cover 31 is separated from the sealed container 3), places the core to be tested in the placement tube 4, and connects the pipeline of the external pressurized tank to the air inlet pipe of the pressure control valve 34;

[0061] Then, the experimenter turns on the first motor 56, and the driving shaft of the first motor 56 rotates the first rotating rod 57, and the first rotating rod 57 makes the driving handle 58 and the connecting shaft 59 revolve around the axis of the first rotating rod 57, and the connecting shaft 59 makes the push-pull rod 51 move downward, and the push-pull rod 51 makes the sealing cover 31 and the placing tube 4 drop vertically through the hinge seat 52, so that the sealing cover 31 is sealed on the open end of the sealing container 3, and the placing tube 4 and the core enter the sealing container 3, and the core is completely immersed in the imbibition solution;

[0062] At this time, the experimenter turns on the second motor 72, and the driving shaft of the second motor 72 rotates the second rotating rod 73, and the second rotating rod 73 rotates the rotating shaft 69 through the two bevel gears 74, and the rotating shaft 69 rotates the two cams 7, and the two cams 7 push the lifting frame 67 to rise vertically through the two arc seats 71, and the lifting frame 67 makes the placement tube 4 rise synchronously through the two connecting plates 63, and the lifting frame 67 squeezes the piston ends of the two spring rods 66 to contract, and when the raised parts of the two cams 7 are offset from the arc surfaces of the two arc seats 71, the placement tube 4, the connecting plate 63 and the lifting frame 67 vertically descend, and the piston ends of the two spring rods 66 extend and reset, and with the reciprocating rotation of the two cams 7, the placement tube 4 and the core are reciprocated and lifted and vibrated, simulating the imbibition of the core under vibration, so that the core is fully in contact with the imbibition solution in the sealed container 3, and the accuracy of the core pressurized imbibition experiment results is further improved.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for characterizing pressurized imbibition by combining appearance and microscopy, characterized in that: The following steps are involved: S1. Apparent imbibition The core to be tested is pressurized by the pressurized imbibition equipment to allow liquid to enter the core to be tested, and a graph of the change in the imbibition water quality is made; S2. Microscopic imbibition Carry out NMR experiments on the measured cores. When measuring a group of water absorption, do a group of one-dimensional NMR; S3. Observation of the absorption liquid position A set of two-dimensional nuclear magnetic resonance images was performed at the beginning and after the imbibition of the core to understand the location of the absorbed liquid before and after the imbibition. S4. Analysis of imbibition changes On the core one-dimensional NMR image, the horizontal axis relaxation time is divided into three sections, and the areas formed by different sections and curves are calculated by calculus. The NMR images at different times are divided into three area change diagrams at different imbibition times and a total area change diagram. S5. Comparison of changes in imbibition Take the area change graph and total area change graph corresponding to the leftmost time period in S4, and their correspondence with the water absorption mass change graph in S1.

2. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 1, characterized in that: The pressurizing device comprises a base platform (1), a magnetic stirrer (2), a sealed container (3), a sealing cover (31), a pressure control valve (34) and a placement tube (4); the magnetic stirrer (2) is mounted on the upper surface of the base platform (1); the sealed container (3) is mounted on the magnetic stirrer (2); the sealing cover (31) is arranged at the open end of the sealed container (3); the pressure control valve (34) is mounted on the sealing cover (31); and the placement tube (4) is arranged in the sealed container (3); A frame plate (11) is fixedly mounted on the upper surface of the base platform (1); a material taking mechanism (5) is provided between the frame plate (11) and the sealing cover (31); and a vibration mechanism (6) is provided between the sealing cover (31) and the placing cylinder (4).

3. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 2, characterized in that: A first sealing ring (32) is fixedly mounted on the outer wall of the sealing cover (31), a second sealing ring (33) is fixedly mounted on the open end of the sealing container (3), the outer wall of the first sealing ring (32) and the inner wall of the second sealing ring (33) are in movable contact, and a plurality of flow holes (41) distributed in a ring array are formed on the bottom wall of the placement cylinder (4).

4. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 2, characterized in that: The material taking mechanism (5) comprises a push-pull rod (51), a hinge seat (52) is fixedly mounted on the upper surface of the sealing cover (31), one end of the push-pull rod (51) is hinged to the hinge seat (52), a first motor (56) is fixedly mounted on one end of the frame plate (11), a first rotating rod (57) is fixedly mounted on the driving output end of the first motor (56), a driving handle (58) is fixedly mounted on one end of the first rotating rod (57), a connecting shaft (59) is fixedly mounted on one end of the driving handle (58), and one end of the connecting shaft (59) is rotatably connected to the other end of the push-pull rod (51).

5. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 4, characterized in that: A first guide groove (53) is formed at one end of the frame plate (11); a first guide block (54) is slidably mounted on the inner wall of the first guide groove (53); a fixing plate (55) is fixedly connected to one side of the first guide block (54); and one end of the fixing plate (55) is fixedly connected to the outer wall of the sealing cover (31).

6. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 2, characterized in that: The vibration mechanism (6) comprises a fixing rod (61), one end of which is fixedly connected to the lower surface of the sealing cover (31), and the other end of which is fixedly mounted with a U-shaped frame (62), and connecting plates (63) are slidably provided on both sides of the U-shaped frame (62), and one end of the two connecting plates (63) is fixedly connected to the open end of the placement cylinder (4), and spring rods (66) are fixedly mounted on both sides of the U-shaped frame (62), and the other ends of the two connecting plates (63) are fixedly mounted with a lifting frame (67), and the piston ends of the two spring rods (66) are fixedly connected to the end of the lifting frame (67).

7. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 6, characterized in that: Two second guide grooves (64) are provided on both sides of the U-shaped frame (62), and second guide blocks (65) are slidably mounted on the inner walls of the second guide grooves (64), wherein the opposite sides of two adjacent second guide blocks (65) are fixedly connected to the other end of a connecting plate (63).

8. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 6, characterized in that: A fixing frame (68) is fixedly installed in the middle of the U-shaped frame (62), a rotating shaft (69) is rotatably installed on one end of the fixing frame (68), cams (7) are fixedly installed on both ends of the rotating shaft (69), and arc seats (71) are fixedly installed on both ends of the lifting frame (67), and one of the cams (7) and one of the arc seats (71) correspond vertically.

9. A method for characterizing pressurized imbibition by combining appearance and microscopy as claimed in claim 8, characterized in that: A second motor (72) is fixedly mounted on the other end of the fixing frame (68); a second rotating rod (73) is fixedly mounted on the driving output end of the second motor (72); a bevel gear (74) is fixedly mounted on one end of the second rotating rod (73) and the middle of the rotating shaft (69); and the two bevel gears (74) are meshed with each other.

Images