Device for measuring porosity of reservoir rock sample

Abstract

The invention relates to the technical field of oil exploration, in particular to a device for measuring the porosity of a reservoir rock sample. Comprising a base, a core chamber, a sealing door, a placement seat, an air cylinder and an opening and closing assembly, the opening and closing assembly comprises a U-shaped frame, a bidirectional threaded rod, two connecting rods, two sleeves, a connecting frame, a driving piece, a sealing piece, two guide rails and two sliding blocks, the U-shaped frame is fixedly connected with the core chamber, and the two ends of the bidirectional threaded rod are rotationally connected with the U-shaped frame; the two sleeves are in threaded fit with the two-way threaded rod, the connecting frame is fixedly connected with the sealing door, the two ends of each connecting rod are rotationally connected with the connecting frame and the corresponding sleeve respectively, the two guide rails are fixedly connected with the core chamber and located on the outer side wall of the core chamber respectively, and the two sliding blocks are fixedly connected with the sealing door and located in the corresponding guide rails respectively. The sealing door can be conveniently fixed outside the rock core chamber, the sealing door can be conveniently closed and opened on the rock core chamber, and the measurement efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum exploration, and in particular to a device for measuring the porosity of a reservoir rock sample. Background Art

[0002] Porosity refers to the ratio of the sum of the volumes of all pore spaces in a rock sample to the volume of the rock sample, which is called the total porosity of the rock and is expressed as a percentage. The greater the total porosity of the reservoir, the larger the pore space in the rock. From a practical point of view, only those pores that are interconnected are of practical significance, because they can not only store oil and gas, but also allow oil and gas to permeate through them. Therefore, in production practice, the concept of effective porosity is proposed. Effective porosity refers to the ratio of the sum of the volumes of pores that are interconnected and allow fluid to flow through them under normal pressure conditions to the total volume of the rock sample, expressed as a percentage. Obviously, the effective porosity of the same rock is less than its total porosity.

[0003] In the prior art patent CN211652453U, a device for measuring the porosity of reservoir rock samples is disclosed, including a core chamber, a sealing door, a base, a placement seat, etc. The placement seat can be slidably arranged in the core chamber, and the placement seat is pushed by a cylinder, so that when the reservoir rock porosity measurement is completed and replaced, the rock sample can be quickly pushed out without manually lifting the reservoir rock, which is convenient for improving the efficiency of rock sample replacement measurement, facilitating the measurement of porosity of multiple rock samples, and improving its measurement efficiency.

[0004] However, in the above-mentioned existing method, the fixing of the sealing door on the core chamber is relatively complicated, and it is inconvenient to close and open the sealing door on the core chamber, which greatly affects the measurement efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a device for measuring the porosity of reservoir rock samples, which solves the problem that the fixing of the existing sealing door on the core chamber is relatively complicated, and it is inconvenient to close and open the sealing door on the core chamber, which greatly affects the measurement efficiency.

[0006] To achieve the above-mentioned purpose, the present invention adopts a device for measuring the porosity of reservoir rock samples, including a base, a core chamber, a sealing door, a placement seat, a cylinder and an opening and closing assembly, wherein the cylinder is arranged in the core chamber, the placement seat is movably arranged in the core chamber, the placement seat is also fixedly connected to the output end of the cylinder, the core chamber is fixedly connected to the base and is located above the base, the sealing door is arranged on the outside of the core chamber, the opening and closing assembly includes a U-shaped frame, a bidirectional threaded rod, two connecting rods, two sleeves, a connecting frame, a driving member, a sealing member, two guide rails and two sliders, the U-shaped frame is fixedly connected to the core chamber and is located above the base. Above the core chamber, both ends of the bidirectional threaded rod are rotatably connected to the U-shaped frame, the two sleeves are sleeved on the outside of the bidirectional threaded rod and are threadedly matched with the bidirectional threaded rod, the connecting frame is fixedly connected to the sealing door and is located above the sealing door, both ends of each connecting rod are rotatably connected to the connecting frame and the corresponding sleeve respectively, the two guide rails are fixedly connected to the core chamber and are respectively located on the outer side walls of the core chamber, the two sliders are fixedly connected to the sealing door and are respectively located in the corresponding guide rails, the sealing door has an annular groove, and the sealing member is arranged in the annular groove.

[0007] Among them, the device for measuring the porosity of reservoir rock samples also includes two guide rods and two support springs. The two guide rods are fixedly connected to the core chamber and are located above the core chamber. The two guide rods are movably connected to the connecting frame and pass through the connecting frame. The two ends of each support spring are respectively fixedly connected to the core chamber and the connecting frame, and are respectively sleeved on the outside of the corresponding guide rod.

[0008] Wherein, the sealing member includes a sealing ring and a plurality of spring rods, the sealing ring is movably connected to the sealing door and adapted to the annular groove, the plurality of spring rods are arranged in the annular groove and fixedly connected to the sealing ring.

[0009] Wherein, the driving component includes a motor plate and a driving motor, the motor plate is fixedly connected to the U-shaped frame and is located on the outer side wall of the U-shaped frame, the driving motor is fixedly connected to the motor plate and is located above the motor plate, and the output end of the driving motor is connected to the bidirectional threaded rod and passes through the U-shaped frame.

[0010] Wherein, the device for measuring the porosity of reservoir rock samples further comprises a plurality of groups of limiter components, and the plurality of groups of limiter components are all arranged on the placement seat.

[0011] Among them, the limiting assembly includes a supporting head, a movable rod, a stopper and a limiting spring. The movable rod is slidably connected to the placement seat and passes through the placement seat. The supporting block is fixedly connected to one end of the movable rod, and the stopper is fixedly connected to the other end of the movable rod. The two ends of the limiting spring are respectively fixedly connected to the stopper and the placement seat, and are sleeved on the outer wall of the movable rod.

[0012] Wherein, the limiting assembly further comprises a rubber sleeve, which is fixedly connected to the abutting head and sleeved on the outer wall of the abutting head.

[0013] In a device for measuring the porosity of reservoir rock samples of the present invention, when the sealing door is opened in the core chamber, the driving member on the U-shaped frame is started, and the driving member controls the bidirectional threaded rod to rotate in the U-shaped frame. Since the two sleeves are threadedly matched with the bidirectional threaded rod, the two sleeves will move relatively on the bidirectional threaded rod. At this time, the two connecting rods will move on the sleeves respectively, and the two connecting rods will gradually stretch and push the connecting frame upward. The connecting frame drives the sealing door to move upward outside the core chamber, and at the same time, the sealing member enters the annular groove of the sealing door, and the sealing door moves upward. After the sealing door is moved into place, the opening of the core chamber is exposed; when the sealing door is reset outside the core chamber, the bidirectional threaded rod is controlled by the driving member to reverse in the U-shaped frame, the two sleeves move away from each other on the bidirectional threaded rod, and the two connecting rods pull the connecting member downward, and the sealing door moves downward outside the core chamber until the sealing door closes the core chamber, and at the same time, the sealing member moves out of the annular groove to maintain the seal inside the core chamber. Through the above method, it is convenient to fix the sealing door outside the core chamber, close and open the sealing door on the core chamber, and improve the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0016] Figure 2 It is a rear view of the overall structure of the first embodiment of the present invention.

[0017] Figure 3 It is a cross-sectional view of the overall internal structure of the first embodiment of the present invention.

[0018] Figure 4 The first embodiment of the present invention Figure 3 A magnified view of the local structure at A.

[0019] Figure 5 It is a cross-sectional view of the overall internal structure of the second embodiment of the present invention.

[0020] Figure 6 It is a schematic structural diagram of a limit assembly according to a second embodiment of the present invention.

[0021] Figure 7 It is a cross-sectional view of the overall internal structure of the third embodiment of the present invention.

[0022] Figure 8 The present invention Figure 7 Enlarged view of the local structure at point B.

[0023] 101-base, 102-core chamber, 103-sealed door, 104-placement seat, 105-cylinder, 106-U-shaped frame, 107-bidirectional threaded rod, 108-connecting rod, 109-connecting frame, 110-guide rail, 111-slider, 112-guide rod, 113-support spring, 114-sealing ring, 115-spring rod, 116-motor plate, 117-drive motor, 118-annular groove, 119-sleeve, 201-holding head, 202-movable rod, 203-stopper, 204-limiting spring, 205-rubber sleeve, 301-electric push rod, 302-moving plate, 303-wiping cotton, 304-collecting frame, 305-first magnet, 306-second magnet. DETAILED DESCRIPTION

[0024] The first embodiment is:

[0025] See also Figure 1 to Figure 4 ,in Figure 1 is a schematic diagram of the overall structure of the first embodiment, Figure 2 is a rear view of the overall structure of the first embodiment, Figure 3 is a cross-sectional view of the overall internal structure of the first embodiment, Figure 4 The first embodiment Figure 3 A magnified view of the local structure at A.

[0026] The present invention provides a device for measuring the porosity of reservoir rock samples, comprising a base 101, a core chamber 102, a sealing door 103, a placement seat 104, a cylinder 105 and an opening and closing assembly, wherein the opening and closing assembly comprises a U-shaped frame 106, a bidirectional threaded rod 107, two connecting rods 108, two sleeves 119, a connecting frame 109, a driving member, a sealing member, two guide rails 110, two sliders 111, two guide rods 112 and two supporting springs 113, the sealing member comprises a sealing ring 114 and a plurality of spring rods 115, and the driving member comprises a motor plate 116 and a driving motor 117;

[0027] According to this specific embodiment, the cylinder 105 is arranged in the core chamber 102, the placement seat 104 is movably arranged in the core chamber 102, and the placement seat 104 is also fixedly connected to the output end of the cylinder 105. The core chamber 102 is fixedly connected to the base 101 and is located above the base 101. The sealing door 103 is arranged on the outside of the core chamber 102, and the placement seat 104 is slidably arranged in the core chamber 102. The placement seat 104 is pushed by the cylinder 105, so that when the reservoir rock porosity measurement is completed and replaced, the rock sample can be quickly pushed out without manually lifting the reservoir rock, which is convenient for improving the efficiency of rock sample replacement measurement, facilitating the measurement of porosity of multiple rock samples, and improving its measurement efficiency.

[0028] The U-shaped frame 106 is fixedly connected to the core chamber 102 and is located above the core chamber 102. Both ends of the bidirectional threaded rod 107 are rotatably connected to the U-shaped frame 106. The two sleeves 119 are sleeved on the outside of the bidirectional threaded rod 107 and are threadedly matched with the bidirectional threaded rod 107. The connecting frame 109 is fixedly connected to the sealing door 103 and is located above the sealing door 103. Both ends of each connecting rod 108 are rotatably connected to the connecting frame 109 and the corresponding sleeve 119, and the two guide rails 110 are connected to the core chamber. 102 is fixedly connected and respectively located on the outer side wall of the core chamber 102, the two sliders 111 are fixedly connected to the sealing door 103 and are respectively located in the corresponding guide rails 110, the sealing door 103 has an annular groove 118, and the sealing member is arranged in the annular groove 118. When the sealing door 103 is opened in the core chamber 102, the driving member on the U-shaped frame 106 is started, and the driving member controls the bidirectional threaded rod 107 to rotate in the U-shaped frame 106. Since the two sleeves 119 are threadedly matched with the bidirectional threaded rod 107, the two sleeves 119 will move relatively on the bidirectional threaded rod 107, at this time, the two connecting rods 108 will move on the sleeve 119 respectively, the two connecting rods 108 will gradually stretch, and push the connecting frame 109 upward, the connecting frame 109 drives the sealing door 103 to move upward outside the core chamber 102, and at the same time the sealing member enters the annular groove 118 of the sealing door 103, after the sealing door 103 moves into place, the core chamber 102 is exposed; when the sealing door 103 is reset outside the core chamber 102, the bidirectional threaded rod 108 is controlled by the driving member to move upward. 107 is reversed in the U-shaped frame 106, the two sleeves 119 move away from each other on the bidirectional threaded rod 107, the two connecting rods 108 pull the connecting piece downward, and the sealing door 103 moves downward outside the core chamber 102 until the sealing door 103 closes the core chamber 102, and at the same time, the sealing piece moves out of the annular groove 118 to maintain the seal in the core chamber 102. Through the above method, it is possible to easily fix the sealing door 103 outside the core chamber 102, and conveniently close and open the sealing door 103 on the core chamber 102, thereby improving the measurement efficiency.

[0029] Secondly, the two guide rods 112 are fixedly connected to the core chamber 102 and are both located above the core chamber 102. The two guide rods 112 are movably connected to the connecting frame 109 and both pass through the connecting frame 109. The two ends of each support spring 113 are respectively fixedly connected to the core chamber 102 and the connecting frame 109, and are respectively sleeved on the outside of the corresponding guide rods 112. When the connecting frame 109 moves, the connecting frame 109 will slide on the two guide rods 112 and drive the two support springs 113 to stretch. The two support springs 113 can provide buffering support to the connecting frame 109 to improve the stability of the sealing door 103 when it moves.

[0030] At the same time, the sealing ring 114 is movably connected to the sealing door 103 and is adapted to the annular groove 118. The plurality of spring rods 115 are all arranged in the annular groove 118 and are all fixedly connected to the sealing ring 114. When the sealing door 103 is opened, the sealing ring 114 is squeezed by the outside of the core chamber 102 and enters the annular groove 118 of the sealing door 103. At the same time, the sealing ring 114 enters the annular groove 118 and squeezes the plurality of spring rods 115. When the sealing door 103 closes the core chamber 102, the sealing ring 114 is no longer restricted. At this time, the plurality of spring rods 115 are reset to push the sealing ring 114 into the core chamber 102, so that the sealing door 103 and the core chamber 102 are kept sealed.

[0031] In addition, the motor plate 116 is fixedly connected to the U-shaped frame 106 and is located on the outer wall of the U-shaped frame 106. The drive motor 117 is fixedly connected to the motor plate 116 and is located above the motor plate 116. The output end of the drive motor 117 is connected to the bidirectional threaded rod 107 and passes through the U-shaped frame 106. The motor plate 116 fixes and supports the drive motor 117 on the outside of the U-shaped frame 106, and the output end of the drive motor 117 controls the bidirectional threaded rod 107 to rotate in the U-shaped frame 106.

[0032] When the core chamber 102 opens the sealing door 103, by starting the driving motor 117 of the motor plate 116, the driving motor 117 controls the bidirectional threaded rod 107 to rotate in the U-shaped frame 106. Since the two sleeves 119 are threadedly matched with the bidirectional threaded rod 107, the two sleeves 119 will move relatively on the bidirectional threaded rod 107. At this time, the two connecting rods 108 will move on the sleeves 119 respectively, and the two connecting rods 108 will gradually stretch and push the connecting frame 109 upward. The connecting frame 109 drives the sealing door 103 to move up outside the core chamber 102. At the same time, the upward movement of the sealing door 103 will cause the sealing ring 114 to enter the annular groove 118 to squeeze the spring rod 115. After the sealing door 103 moves into place, the core chamber 10 2 exposes the opening; when the sealing door 103 is reset outside the core chamber 102, the driving motor 117 controls the bidirectional threaded rod 107 to reverse in the U-shaped frame 106, the two sleeves 119 move away from each other on the bidirectional threaded rod 107, and the two connecting rods 108 pull the connecting piece downward, and the sealing door 103 moves downward outside the core chamber 102 until the sealing door 103 closes the core chamber 102. At the same time, the sealing ring 114 is no longer restricted. At this time, the multiple spring rods 115 are reset to push the sealing ring 114 into the core chamber 102 to maintain the sealing inside the core chamber 102. Through the above method, it is convenient to fix the sealing door 103 outside the core chamber 102, and it is convenient to close and open the sealing door 103 on the core chamber 102, thereby improving the measurement efficiency.

[0033] The second embodiment is:

[0034] Based on the first embodiment, please refer to Figure 5 and Figure 6 ,in Figure 5 is a cross-sectional view of the overall internal structure of the second embodiment, Figure 6 2 is a schematic structural diagram of the position limiting assembly of the second embodiment.

[0035] The present invention provides a device for measuring the porosity of reservoir rock samples, which also includes multiple groups of limit assemblies, wherein the limit assemblies include a holding head 201, a movable rod 202, a stopper 203, a limit spring 204 and a rubber sleeve 205;

[0036] According to this specific embodiment, multiple groups of the limiting components are arranged on the placement seat 104. By setting the limiting components on the placement seat 104, the rock sample can be stabilized in the placement seat 104 by using the limiting components to prevent the rock sample from moving easily in the placement seat 104, which is beneficial to the measurement of the rock sample.

[0037] The movable rod 202 is slidably connected to the placement seat 104 and penetrates the placement seat 104. The abutment block is fixedly connected to one end of the movable rod 202. The stopper 203 is fixedly connected to the other end of the movable rod 202. The two ends of the limit spring 204 are respectively fixedly connected to the stopper 203 and the placement seat 104 and are sleeved on the outer wall of the movable rod 202. When measuring the rock sample, by placing the rock sample in the placement seat 104, the rock sample will be contacted by the multiple abutment heads 201, and each abutment head 201 will respectively drive the movable rod 202 to slide on the placement seat 104, and at the same time the limit spring 204 will stretch as the movable rod 202 moves, and the action of the limit spring 204 will cause the holding head 201 to hold the outer wall of the rock sample, so that the rock sample is fixed in the placement seat 104, and then the sealing door 103 is closed, and the equipment is started to measure the rock sample. Through the above method, the rock sample can be stabilized in the placement seat 104, avoiding the rock sample from moving easily in the placement seat 104, which is beneficial to the measurement of the rock sample.

[0038] Secondly, the rubber sleeve 205 is fixedly connected to the supporting head 201 and is sleeved on the outer wall of the supporting head 201. By arranging the rubber sleeve 205 outside the supporting head 201, the rubber sleeve 205 can increase the friction between the supporting head 201 and the rock sample, while avoiding the wear of the supporting head 201, so that the rock sample is fixed more stably in the placement seat 104.

[0039] When measuring the rock sample, by placing the rock sample in the placement seat 104, the rock sample will be contacted by the multiple abutting heads 201, and each of the abutting heads 201 will drive the movable rod 202 to slide on the placement seat 104 respectively. At the same time, the limit spring 204 is stretched as the movable rod 202 moves, and the force of the limit spring 204 causes the abutting head 201 to abut against the outer wall of the rock sample, so that the rock sample is fixed in the placement seat 104, and then the sealing door 103 is closed, and the equipment is started to measure the rock sample; in addition, by arranging the rubber sleeve 205 outside the abutting head 201, the rubber sleeve 205 can increase the friction between the abutting head 201 and the rock sample, and at the same time avoid the wear of the abutting head 201, so that the rock sample is fixed more stably in the placement seat 104. In the above manner, the rock sample can be stabilized in the placement seat 104, and the rock sample can be prevented from being easily movable in the placement seat 104, which is beneficial to the measurement of the rock sample.

[0040] The third embodiment is:

[0041] Based on the second embodiment, please refer to Figure 7 and Figure 8 ,in Figure 7 is a cross-sectional view of the overall internal structure of the third embodiment, Figure 8 yes Figure 7 Enlarged view of the local structure at point B.

[0042] The present invention provides a device for measuring the porosity of a reservoir rock sample, which also includes a cleaning component, wherein the cleaning component includes an electric push rod 301, a moving plate 302, a wiping cotton 303, a fixing part and a collecting frame 304, and the fixing part includes a first magnet 30505 and a second magnet 306;

[0043] According to this specific embodiment, the cleaning component is disposed on the placement seat 104. By disposing the cleaning component, the surface of the placement seat 104 can be cleaned by using the cleaning component to clean the rock sample debris, which is convenient for subsequent use.

[0044] The movable plate 302 is located in the placement seat 104, the wiping cotton 303 is arranged on the outer side wall of the movable plate 302, the collecting frame 304 is located outside the placement seat 104, the fixing parts are respectively connected to the collecting frame 304 and the placement seat 104, the electric push rod 301 is fixedly connected to the core chamber 102 and is located in the core chamber 102, the output end of the electric push rod 301 is fixedly connected to the movable plate 302, when the rock sample is measured, the rock sample is taken out from the placement seat 104, and then the rock sample is started. The electric push rod 301 is moved, and the output end of the electric push rod 301 extends out, and drives the movable plate 302 to move above the placement seat 104. At the same time, the wiping cotton 303 on the movable plate 302 cleans the surface of the placement seat 104, and the wiping cotton 303 pushes the rock sample debris into the collection frame 304 for storage. After cleaning, the electric push rod 301 is used to reset the movable plate 302. Through the above method, the surface of the placement seat 104 can be cleaned, and the rock sample debris can be cleaned for subsequent use.

[0045] Secondly, the first magnet 30505 is fixedly connected to the placement seat 104 and is located on the outside of the placement seat 104. The second magnet 306 is fixedly connected to the collection frame 304 and is located on the outside of the collection frame 304. The second magnet 306 is magnetically attracted to the first magnet 30505. The collection frame 304 is fixed on the outside of the placement seat 104 by the magnetic attraction between the second magnet 306 and the first magnet 30505, which makes it convenient to take and place the collection frame 304 on the placement seat 104, thereby facilitating the collection frame 304 to be removed and placed on the placement seat 104, thereby facilitating the collection of rock sample debris.

[0046] When the rock sample is measured, the rock sample is taken out from the placement seat 104, and then the electric push rod 301 is started. The output end of the electric push rod 301 extends out and drives the movable plate 302 to move above the placement seat 104. At the same time, the wiping cotton 303 on the movable plate 302 cleans the surface of the placement seat 104, and the wiping cotton 303 pushes the rock sample debris into the collection frame 304 for storage. After cleaning, the movable plate 302 is reset by using the electric push rod 301, and the collection frame 304 is fixed on the outside of the placement seat 104 by the magnetic attraction between the second magnet 306 and the first magnet 30505, so that the collection frame 304 can be conveniently taken and placed on the placement seat 104. In the above manner, the surface of the placement seat 104 can be cleaned, and the rock sample debris can be cleaned for subsequent use.

[0047] The above disclosures are only various preferred embodiments of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention are still within the scope of the invention.

Claims

1. A device for measuring the porosity of reservoir rock samples, comprising a base, a core chamber, a sealing door, a placement seat and a cylinder, wherein the cylinder is arranged in the core chamber, the placement seat is movably arranged in the core chamber, the placement seat is also fixedly connected to the output end of the cylinder, the core chamber is fixedly connected to the base and is located above the base, and the sealing door is arranged on the outside of the core chamber, characterized in that: The invention also includes an opening and closing assembly, which includes a U-shaped frame, a two-way threaded rod, two connecting rods, two sleeves, a connecting frame, a driving member, a sealing member, two guide rails and two sliders. The U-shaped frame is fixedly connected to the core chamber and is located above the core chamber. Both ends of the two-way threaded rod are rotatably connected to the U-shaped frame. The two sleeves are sleeved on the outside of the two-way threaded rod and are threadedly matched with the two-way threaded rod. The connecting frame is fixedly connected to the sealing door and is located above the sealing door. Both ends of each connecting rod are rotatably connected to the connecting frame and the corresponding sleeve respectively. The two guide rails are fixedly connected to the core chamber and are respectively located on the outer side walls of the core chamber. The two sliders are fixedly connected to the sealing door and are respectively located in the corresponding guide rails. The sealing door has an annular groove, and the sealing member is arranged in the annular groove.

2. The device for measuring the porosity of a reservoir rock sample according to claim 1, characterized in that: The device for measuring the porosity of reservoir rock samples also includes two guide rods and two support springs. The two guide rods are fixedly connected to the core chamber and are located above the core chamber. The two guide rods are movably connected to the connecting frame and pass through the connecting frame. The two ends of each support spring are respectively fixedly connected to the core chamber and the connecting frame, and are respectively sleeved on the outside of the corresponding guide rods.

3. The device for measuring the porosity of a reservoir rock sample according to claim 2, characterized in that: The sealing member comprises a sealing ring and a plurality of spring rods. The sealing ring is movably connected to the sealing door and is adapted to the annular groove. The plurality of spring rods are all arranged in the annular groove and are fixedly connected to the sealing ring.

4. The device for measuring the porosity of a reservoir rock sample according to claim 3, characterized in that: The driving component includes a motor plate and a driving motor. The motor plate is fixedly connected to the U-shaped frame and is located on the outer side wall of the U-shaped frame. The driving motor is fixedly connected to the motor plate and is located above the motor plate. The output end of the driving motor is connected to the bidirectional threaded rod and passes through the U-shaped frame.

5. The device for measuring the porosity of a reservoir rock sample according to claim 1, characterized in that: The device for measuring the porosity of reservoir rock samples also includes a plurality of groups of limiter components, and the plurality of groups of limiter components are all arranged on the placement seat.

6. The device for measuring the porosity of a reservoir rock sample according to claim 5, characterized in that: The limiting assembly includes a supporting head, a movable rod, a stopper and a limiting spring. The movable rod is slidably connected to the placement seat and passes through the placement seat. The supporting block is fixedly connected to one end of the movable rod, and the stopper is fixedly connected to the other end of the movable rod. Both ends of the limiting spring are respectively fixedly connected to the stopper and the placement seat, and are sleeved on the outer wall of the movable rod.

7. The device for measuring the porosity of a reservoir rock sample according to claim 6, characterized in that: The limiting assembly also includes a rubber sleeve, which is fixedly connected to the abutting head and sleeved on the outer wall of the abutting head.

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