A core spontaneous imbibition CT scanning experimental device

Abstract

The utility model relates to CT scanning technical field, concretely relates to a core self -absorption CT scanning experimental device, including the chassis, the ray emitting device of setting in the one side of chassis top, the ray receiving device of setting in the other side of chassis top, its characterized in be reached still including: the water tank of setting between the ray emitting device and the ray receiving device, the fixed assembly for fixing core through the top of water tank, the junction of fixed assembly and water tank is sealed state, the pressurizing assembly of setting in the one side of water tank, wherein: the pressurizing assembly includes the air pipe of setting in the one side upper end of water tank and through water tank, the valve of stringing in air pipe, the one end of air pipe located water tank outside can detachably connect with external gas supply source. The utility model discloses when needing to change water pressure, fills in the gas in water tank through external gas supply source, makes the pressure of whole in water tank increase, thereby increases the pressure of water, simulates the experimental condition under different water pressure, and the comprehensiveness of experimental result has been improved.

Description

Technical Field

[0001] This utility model relates to the field of CT scanning technology, and in particular to a core self-absorption CT scanning experimental device. Background Technology

[0002] Core self-absorption experiments are a key technology for studying the interaction between formation rocks and fluids (such as hydrate formation, shale gas adsorption, and spontaneous crude oil permeation).

[0003] Patent application number 201820967423.4 discloses a core self-absorption CT scanning experimental device, including an experimental base. Above the experimental base is a CT scanning device capable of three-dimensional and two-dimensional projection scanning, and a core self-absorption device suitable for the CT scanning device. The core self-absorption device includes a CT scanning base, an experimental support frame, and a self-absorption water tank. A rotating scanning device capable of 360-degree rotation of the core self-absorption device is provided between the CT scanning base and the experimental base. The inner wall of the self-absorption water tank has uniform graduations for easy measurement of the water volume. The experimental support frame is vertically mounted above the CT scanning base via a fixed knob. The lower end of the self-absorption water tank is connected to the upper end of the experimental support frame. A core fixing device is provided above the self-absorption water tank. This device can obtain the intrusion velocity of the core self-absorption experiment and the three-dimensional spatial distribution of the intruding fluid in the core pores.

[0004] Although the above-mentioned device can perform the corresponding experiments, it cannot simulate experimental conditions under different water pressures, and the experimental results are not comprehensive enough. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to propose a core self-absorption CT scanning experimental device to solve the problems that it cannot simulate experimental conditions under different water pressures and the experimental results are not comprehensive enough.

[0006] To achieve the above objectives, this utility model provides a core self-absorption CT scanning experimental device, including a base frame, a radiation emitting device disposed on one side of the top of the base frame, a radiation receiving device disposed on the other side of the top of the base frame, and further including: a water tank disposed between the radiation emitting device and the radiation receiving device, a fixing assembly penetrating the top of the water tank for fixing the core, wherein the connection between the fixing assembly and the water tank is sealed, and a pressurizing assembly disposed on one side of the water tank, wherein:

[0007] The pressurization assembly includes an air pipe disposed on the upper side of the water tank and passing through the water tank, a valve connected in series on the air pipe, and an external air supply source detachably connected to one end of the air pipe located outside the water tank.

[0008] A heating wire is provided at the lower end of the water tank for heating the water. A temperature measuring device is provided on the water tank. One end of the air pipe inside the water tank is connected to a vertical pipe, which extends downward to the lower end of the water tank.

[0009] Optionally, the fixing component includes a fixing frame, an airbag disposed within the fixing frame, and an air nozzle disposed on the airbag.

[0010] After the core is placed in the fixed frame, air is injected into the air bladder through the air nozzle. The air bladder expands and tightly wraps around the core, thus fixing the core in the fixed frame. At the same time, by changing the amount of air injected into the air bladder, the pressure of the air bladder on the core can be changed, thereby simulating the self-absorption situation of the core under different pressures.

[0011] Optionally, the connection between the fixing frame and the water tank is a threaded detachable connection.

[0012] Optionally, the water tank is rotatably connected to the base frame, and the water tank is driven by a drive unit, which drives the water tank to rotate, thereby driving the core in the fixed assembly to rotate.

[0013] Optionally, the drive unit includes a motor, a gear mounted on the motor's rotating shaft, and a gear ring fitted around the outside of the water tank and meshing with the gear.

[0014] The heating wire generates heat when energized, heating the water in the tank. A digital thermometer is used to measure the water temperature in real time, displaying the data on the thermometer's screen. This allows researchers to monitor and adjust the water temperature to meet different experimental conditions, enabling self-absorption experiments on core samples at varying water temperatures.

[0015] Optionally, a pressure gauge is also connected in series with the trachea.

[0016] The core sample to be scanned is mounted on a fixed assembly, and an appropriate amount of water is added to the water tank so that the bottom of the core sample is below the water surface, thus starting the core self-absorption experiment. The X-ray emitting device emits X-rays of a specific frequency, and the X-ray receiving device receives the X-rays after they pass through the core sample to obtain information about the internal structure of the core sample. When it is necessary to change the water pressure, gas is injected into the water tank through an external air supply source, which increases the overall pressure in the water tank, thereby increasing the water pressure. This simulates experimental conditions under different water pressures and improves the comprehensiveness of the experimental results.

[0017] The heating wire generates heat when energized, heating the water in the tank. A digital thermometer is used to measure the water temperature in real time, displaying the data on the thermometer's screen. This allows researchers to monitor and adjust the water temperature to meet different experimental conditions, enabling self-absorption experiments on core samples at varying water temperatures. When simultaneous adjustments to water temperature and pressure are needed, airflow is introduced into the water, agitating it and ensuring more even heating. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the experimental device structure for an embodiment of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the experimental device structure for an embodiment of the present invention. Figure 2 .

[0021] The numbers on the map are:

[0022] 1. Base frame; 2. X-ray emitting device; 3. X-ray receiving device; 4. Water tank; 5. Fixing components; 6. Air pipe; 7. Valve; 8. Fixing frame; 9. Airbag; 10. Air nozzle; 11. Motor; 12. Gear; 13. Gear ring; 14. Heating wire; 15. Vertical pipe; 16. Pressure gauge. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figure 1 As shown, a core self-absorption CT scanning experimental device includes a base frame 1, a radiation emitting device 2 disposed on one side of the top of the base frame 1, a radiation receiving device 3 disposed on the other side of the top of the base frame 1, and further includes: a water tank 4 disposed between the radiation emitting device 2 and the radiation receiving device 3, a fixing component 5 penetrating the top of the water tank 4 for fixing the core, the connection between the fixing component 5 and the water tank 4 being sealed, and a pressurizing component disposed on one side of the water tank 4, wherein:

[0026] The pressurization assembly includes an air pipe 6 located on the upper side of the water tank 4 and passing through the water tank 4, and a valve 7 connected in series on the air pipe 6. The valve 7 can be a manual ball valve, which controls the flow of gas by rotating the ball. The end of the air pipe 6 located outside the water tank 4 is detachably connected to an external air supply source (such as an air compressor).

[0027] The core sample to be scanned is mounted on the fixed assembly 5, and an appropriate amount of water is added to the water tank 4 so that the bottom of the core sample is below the water surface, thus starting the core self-absorption experiment. The X-ray emitting device 2 emits X-rays of a specific frequency, and the X-ray receiving device 3 receives the X-rays after they pass through the core sample to obtain information about the internal structure of the core sample. When it is necessary to change the water pressure, gas is injected into the water tank 4 through an external air supply source, which increases the overall pressure in the water tank 4, thereby increasing the water pressure and simulating experimental conditions under different water pressures, thus improving the comprehensiveness of the experimental results. When the pressure reaches the predetermined value, the valve 7 can be closed, and then the external air supply source can be removed.

[0028] like Figure 2As shown, in some embodiments, the fixing component 5 includes a fixing frame 8, an airbag 9 disposed within the fixing frame 8, and an air nozzle 10 disposed on the airbag 9. After the core is placed into the fixing frame 8, air is injected into the airbag 9 through the air nozzle 10. After the airbag 9 expands, it tightly wraps around the core, thereby fixing the core within the fixing frame 8. At the same time, the pressure of the airbag 9 on the core can be changed by the amount of air injected into the airbag 9, thereby simulating the self-absorption situation of the core under different pressures.

[0029] In some embodiments, the connection between the fixing frame 8 and the water tank 4 is a threaded detachable connection. The outer wall of the fixing frame 8 is provided with external threads, and the corresponding position on the top of the water tank 4 is provided with internal threads. The fixing frame 8 achieves a detachable connection by engaging the external threads with the internal threads on the top of the water tank 4. During installation, the fixing frame 8 is slowly screwed into the top of the water tank 4 to ensure a tight connection and good seal; during disassembly, simply rotate the fixing frame 8 in the reverse direction to remove it from the water tank 4, thus facilitating the installation of the core sample.

[0030] like Figure 2 As shown, in some embodiments, the water tank 4 is rotatably connected to the base frame 1, and the water tank 4 is driven by a drive unit. The drive unit is used to drive the water tank 4 to rotate, thereby driving the rock core in the fixing assembly 5 to rotate. Optionally, the drive unit includes a motor 11, a gear 12 disposed on the rotating shaft of the motor 11, and a gear ring 13 sleeved on the outside of the water tank 4 and meshing with the gear 12.

[0031] When motor 11 starts, the rotating shaft of motor 11 drives gear 12 to rotate. Gear 12 transmits power to gear ring 13 through meshing with gear ring 13, thereby driving water tank 4 to rotate, which in turn drives rock core to rotate for three-dimensional scanning.

[0032] like Figure 2 As shown, in some embodiments, a heating wire 14 is provided at the lower end of the water tank 4, the heating wire 14 is used to heat the water, and a temperature measuring device is provided on the water tank 4.

[0033] When the heating wire 14 is energized, it generates heat to heat the water in the water tank 4. The temperature measuring device is a digital thermometer, with its probe placed inside the water tank 4 to measure the water temperature in the tank 4 in real time and display the temperature data on the thermometer's display screen. This allows the experimenter to monitor and adjust the water temperature to meet the requirements of different experimental conditions, thereby enabling the self-absorption experiment of the core sample at different water temperatures.

[0034] like Figure 2As shown, in some embodiments, one end of the air pipe 6 located inside the water tank 4 is connected to a vertical pipe 15, which extends downwards to the lower end of the water tank 4. When it is necessary to adjust the water temperature and pressure simultaneously, airflow will be blown into the water, agitating the water in the water tank 4, making the water heated more evenly.

[0035] like Figure 2 As shown, in some embodiments, a pressure gauge 16 is also connected in series on the air pipe 6, which allows the experimenter to monitor and adjust the pressure inside the water tank 4.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0037] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A core self-absorption CT scanning experimental apparatus, comprising a base frame (1), a radiation emitting device (2) disposed on one side of the top of the base frame (1), and a radiation receiving device (3) disposed on the other side of the top of the base frame (1), characterized in that, Also includes: A water tank (4) is located between the radiation emitting device (2) and the radiation receiving device (3). A fixing assembly (5) for fixing the rock core passes through the top of the water tank (4). The connection between the fixing assembly (5) and the water tank (4) is sealed. A pressurizing assembly is located on one side of the water tank (4). The pressurization assembly includes an air pipe (6) disposed on the upper side of the water tank (4) and passing through the water tank (4), a valve (7) connected in series on the air pipe (6), and an external air supply source detachably connected to one end of the air pipe (6) located outside the water tank (4). The lower end of the water tank (4) is provided with a heating wire (14) for heating water. The water tank (4) is provided with a temperature measuring device. One end of the air pipe (6) located inside the water tank (4) is connected to a vertical pipe (15). The vertical pipe (15) extends downward to the lower end of the water tank (4).

2. The core self-absorption CT scanning experimental device according to claim 1, characterized in that, The fixing component (5) includes a fixing frame (8), an airbag (9) disposed within the fixing frame (8), and an air nozzle (10) disposed on the airbag (9).

3. The core self-absorption CT scanning experimental device according to claim 2, characterized in that, The connection between the fixed frame (8) and the water tank (4) is a threaded detachable connection.

4. The core self-absorption CT scanning experimental device according to claim 1, characterized in that, The water tank (4) is rotatably connected to the base frame (1), and the water tank (4) is connected to a drive unit. The drive unit is used to drive the water tank (4) to rotate, thereby driving the core in the fixed assembly (5) to rotate.

5. The core self-absorption CT scanning experimental device according to claim 4, characterized in that, The drive unit includes a motor (11), a gear (12) mounted on the rotating shaft of the motor (11), and a gear ring (13) sleeved on the outside of the water tank (4) and meshing with the gear (12).

6. The core self-absorption CT scanning experimental device according to claim 1, characterized in that, A pressure gauge (16) is also connected in series on the trachea (6).

Images