Warming and pressurizing visible micro-nano seepage simulation device

Abstract

The present invention provides a heating, pressurizing and visible micro-nano seepage simulation device, and relates to the technical field of oil-gas exploration and development, the heating, pressurizing and visible micro-nano seepage simulation device comprises: a container having a pressurizing hole and a transparent observation window; the heater is arranged in the container; the micron tube penetrates through the container, and two ends of the micron tube are hermetically connected with the container; the adjustable support comprises a plurality of sliding rails and a plurality of sliding blocks, all the sliding rails are located on the same plane, one ends of the sliding rails are gathered and connected to one point, each sliding block is in sliding connection with one sliding rail, all the sliding blocks surround to form a circle so that the micron tube can be wound, and the tortuosity of the micron tube can be changed by sliding the sliding blocks along the sliding rails. The device has the beneficial effects that by adjusting the position of each sliding block on the sliding rail, the number of winding circles of the micro-tube can be changed, so that the tortuosity of the micro-tube is changed, the tortuosity required by an experiment is realized, real flow conditions are simulated, gas-liquid phase flow experiment requirements of different micro-nano scales can be met, and gas-liquid phase flow characteristics of a real stratum can be reflected.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploration and development, and in particular to a micro-nano seepage simulation device capable of heating, pressurizing and visualization. Background Art

[0002] With the continuous advancement of oil and gas exploration and development, low-permeability oil and gas resources have shown strong reserves. Most of the oil fields currently discovered in my country are low-permeability oil fields with huge development potential. However, the unique physical properties of low-permeability oil and gas fields and their complex pore structures such as fine channels and small scales restrict their exploitation. Therefore, it is urgent to master the seepage mechanism of oil and gas in low-permeability reservoirs, thereby improving the development efficiency of low-permeability oil and gas fields and increasing my country's oil and gas production.

[0003] Microtubes can be used as channels for fluids, and their inner diameter is generally between 0.02 and 500 microns. They are widely used to study the flow behavior of oil, gas, and water in micro-nano pores. However, existing research focuses on its air tightness and clamping, and has not been able to change the temperature, pressure, and tortuosity conditions of fluid flow, resulting in the inability to reflect the migration behavior of fluids in micro-nano pores under real formation conditions. Summary of the invention

[0004] In view of this, in order to solve the problem that the current micro-nano seepage simulation cannot reflect the migration behavior of fluid in micro-nano pores under real formation conditions, an embodiment of the present invention provides a micro-nano seepage simulation device that can be heated, pressurized and visualized.

[0005] The embodiment of the present invention provides a micro-nano percolation simulation device capable of heating, pressurizing and visualization, comprising:

[0006] A container having a pressurized hole and a transparent observation window;

[0007] a heater disposed in the container;

[0008] A microtube, which penetrates the container and has both ends sealedly connected to the container;

[0009] And an adjustable bracket, which includes multiple slide rails and multiple sliders, all of the slide rails are located on the same plane and are connected at one end to a point, each slider is slidably connected to a slide rail, all the sliders are arranged in a circle for the microtube to be wound around, and the sliders can change the tortuosity of the microtube by sliding along the slide rails.

[0010] Furthermore, each of the slide rails is located on a plurality of evenly spaced radii on the same circumference.

[0011] Furthermore, the slider can be slidably mounted on the slide rail, and the slider is also provided with a locking member, and the locking member can lock the slider at any position of the slide rail.

[0012] Furthermore, a locking groove is provided on one side of the slide rail, a positioning hole is provided on one side of the slide block, and the locking member is a locking bolt, which is threadedly connected to the positioning hole and can be pressed against the locking groove.

[0013] Furthermore, the longitudinal section of the slide rail is rectangular, the slider is provided with a rectangular slide groove, and the slider is sleeved on the slide rail through the slide groove.

[0014] Furthermore, the slide rail is provided with a length scale.

[0015] Furthermore, it also includes two clamps, which are respectively installed on both sides of the container and coaxially arranged, each of the clamps includes a sealing bolt, an experimental pipeline and a sealing ring, the sealing bolt and the sealing ring are both arranged on the outer wall of the container, one end of the experimental pipeline passes through the sealing bolt and extends into the sealing ring, one end of the microtube is inserted into the experimental pipeline, and the sealing bolt clamps the sealing ring to seal the microtube and the experimental pipeline.

[0016] Furthermore, it also includes a magnifying glass, which is embedded in the transparent observation window.

[0017] Furthermore, a hook is provided in the container, and the hook hooks the microtube so that the magnifying glass is aligned with the microtube.

[0018] Furthermore, the pressurizing hole is arranged at the top of the container, and the pressurizing hole is provided with a pressure sensor.

[0019] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are:

[0020] 1. The present invention provides a micro-nano seepage simulation device that can be heated, pressurized, and visualized. When the fluid flows through the microtube, it bypasses multiple sliders on the adjustable bracket, and the middle part of the microtube is wound into multiple circles. By adjusting the position of each slider on the slide rail, the number of circles of the microtube can be changed, thereby changing the tortuosity of the microtube, achieving the tortuosity required for the experiment, simulating real flow conditions, and meeting the requirements of gas-liquid flow experiments at different micro-nano scales, so that the experimental results can more accurately reflect the gas-liquid flow characteristics of the real formation, and study the seepage mechanism of oil and gas in low-permeability reservoirs.

[0021] 2. The present invention provides a micro-nano seepage simulation device that can be heated, pressurized, and visualized. The pressurized hole and the heater can quickly and conveniently change the temperature and pressure of the liquid in the container. The micron tube is immersed in the liquid, so that the temperature and pressure are evenly distributed around the micron tube, simulating the actual underground temperature and confining pressure to ensure the accuracy of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a micro-nano percolation simulation device capable of heating, pressurizing and visualization according to the present invention;

[0023] Figure 2 is a schematic diagram of the gripper;

[0024] Figure 3 is a schematic diagram of an adjustable bracket.

[0025] In the figure: 1. container; 2. pressurizing hole; 3. heater; 4. micrometer tube; 5. adjustable bracket; 6. top cover; 7. pressure sensor; 8. clamp; 9. magnifying glass; 10. sealing bolt; 11. experimental pipeline; 12. sealing ring; 13. slide rail; 14. slider; 15. locking groove; 16. positioning hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in conjunction with the accompanying drawings. The following is a preferred embodiment of the present invention, which is intended to provide a basic understanding of the present invention, but is not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0030] It should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Please refer to Figure 1An embodiment of the present invention provides a micro-nano percolation simulation device that can be heated, pressurized, and visualized, and mainly includes a container 1, a heater 3, a microtube 4, and an adjustable bracket 5.

[0032] The container 1 is used to contain liquids, such as water, oil, etc. The shape of the container can be flexibly set according to the actual application scenario. For example, in this embodiment, the container 1 is a cylindrical container 1. The top of the container 1 is provided with a detachable top cover 6.

[0033] The container 1 also has a pressurizing hole 2 and a transparent observation window. The pressurizing hole 2 is arranged at the top of the container 1, and the pressurizing hole 2 can provide pressure for the liquid inside the container 1 through an external pressure pump. The pressurizing hole 2 is provided with a pressure sensor 7 to monitor the pressure inside the container 1.

[0034] The heater 3 is arranged in the container 1. In this embodiment, the heater 3 is installed on the top of the container 1. The heater 3 is an electric heater made of nickel-chromium alloy with a diameter between 1 mm and 2 mm. The enhanced heating temperature can be adjusted, and the maximum temperature can reach 300°C.

[0035] The microtube 4 penetrates the container 1 and both ends are sealed and connected to the container 1. The microtube 4 is immersed in the liquid in the container 1, and both ends of the microtube 4 extend to both sides of the container 1. The inner diameter of the micro-nanotube can be as small as 20nm.

[0036] In some embodiments, the micro-nano percolation simulation device capable of heating, pressurizing and visualization of the present invention further comprises two clamps 8, and the two ends of the microtube 4 are respectively mounted on the opposite sides of the container 1 through the two clamps 8. Specifically, Figure 2 As shown, the two clamps 8 are horizontally installed on both sides of the container 1 and are coaxially arranged. Each clamp 8 includes a sealing bolt 10, an experimental pipeline 11 and a sealing ring 12. The sealing bolt 10 and the sealing ring 12 are both arranged on the outer wall of the container 1. One end of the experimental pipeline 11 passes through the sealing bolt 10 and extends into the sealing ring 12. One end of the microtube 4 is inserted into the experimental pipeline 11. The sealing bolt 10 clamps the sealing ring 12 to seal the microtube 4 and the experimental pipeline 11.

[0037] like Figure 3As shown, the adjustable bracket 5 includes a plurality of slide rails 13 and a plurality of sliders 14. All the slide rails 13 are located on the same plane and are connected at one end to a point. Each slider 14 is slidably connected to a slide rail 13. All the sliders 14 are arranged in a circle for the microtube 4 to wind around. The sliders 14 slide along the slide rails 13 to change the tortuosity of the microtube 4. The middle part of the microtube 4 surrounds each slider 14 to form multiple circles. The change of the position of the slider 14 can adjust the number of circles formed by the microtube 4 and the tortuosity of the microtube 4.

[0038] It should be noted that the slide rail 13 and the slider 14 can be set to a variety of sliding connection structures, as long as the slider 14 can slide linearly along the slide rail 13.

[0039] The longitudinal section of the slide rail 13 is rectangular, and the slider 14 is provided with a rectangular slide groove. The slider 14 is sleeved on the slide rail 13 through the slide groove.

[0040] The number of the slide rails 13 can be flexibly set according to the specifications of the container 1, and is generally set to four or more, so that the microtube 4 forms a desired bending state. For example, in this embodiment, the number of the slide rails 13 is set to four, and the slide rails 13 are arranged in a cross shape. In other embodiments, each of the slide rails 13 is located on a plurality of evenly spaced radii on the same circumference. In this way, each of the slide rails 13 can make the microtube 4 evenly wound, and closer to annular winding, generally simulating a more accurate tortuosity.

[0041] In order to keep the slider 14 fixed after sliding to the desired position on the slide rail 13,

[0042] The slider 14 is slidably mounted on the slide rail 13, and the slider 14 is also provided with a locking member, which can lock the slider 14 at any position of the slide rail 13. In some embodiments, a locking groove 15 is provided on one side of the slide rail 13, and a positioning hole 16 is provided on one side of the slider 14. The locking member is a locking bolt, which is threadedly connected to the positioning hole 16 and can be pressed against the locking groove 15. Furthermore, in order to accurately determine whether the slider 14 slides to a desired position, a length scale is provided on the slide rail 13, and the sliding position of the slider 14 is determined by the length scale.

[0043] In addition, the micro-nano percolation simulation device capable of heating, pressurizing and visualization of the present invention further comprises a magnifying glass 9, which is embedded in the transparent observation window. The transparent observation hole can be made of the magnifying glass 9 and embedded in the container 1 through glass glue. The magnifying glass 9 should fit tightly with the container 1 and be resistant to high temperature and high pressure without leakage. The gas-liquid flow characteristics in the microtube 4 can be observed in real time through the magnifying glass 9, so as to more perfectly grasp the dynamic flow process of the gas-liquid phase in the micro-nano medium.

[0044] Furthermore, a hook may be provided in the container 1 , and the hook hooks the microtube 4 to bring the microtube 4 close to the magnifying glass 9 , so that the magnifying glass 9 is aimed at the microtube 4 , so as to observe the seepage condition in the microtube 4 .

[0045] It should be noted that the container 1 and the clamp 8 in the present application are both made of aluminum alloy, which is resistant to high temperature and high pressure and has high modifiability.

[0046] The specific process of the micro-nano seepage simulation device capable of heating, pressurizing and visualization of the present invention to simulate the migration behavior of fluid in micro-nano pores under real formation environment is as follows:

[0047] Insert the microtube 4 into the experimental pipeline 11 of the holder 8 on the left, twist the sealing bolt 10 to clamp the sealing ring 12, so that the left end of the microtube 4 is sealed and connected to the experimental pipeline of the holder 8 on the left;

[0048] Open the top of the container 1, adjust the position of the slider 14 according to the experimental requirements, and fix the slider 14 by a locking member, and surround the middle of the microtube 4 on each slider 14 to make the microtube 4 form the tortuosity required by the experiment;

[0049] The microtube 4 is hooked by the hook, and the magnifying glass 9 is aligned with the microtube 4; the right end of the microtube 4 is inserted into the experimental pipeline 11 of the clamp 8 on the right side, and the sealing bolt 10 is twisted to clamp the sealing ring 12, so that the right end of the microtube 4 is sealed and connected to the experimental pipeline of the clamp 8 on the right side;

[0050] The top of the container 1 is sealed, and liquid (water) is injected into the container 1 through the pressurized hole 2. The pressure sensor 7 is monitored in real time until the injection reaches the required pressure of the experiment. Then, the heater 3 is started to heat the liquid in the container 1 to the required temperature, and the fluid flow characteristics in the microtube 4 are observed through the magnifying glass 9.

[0051] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0052] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-nano percolation simulation device capable of heating, pressurizing and visualization, characterized in that: include: A container having a pressurized hole and a transparent observation window; a heater disposed in the container; A microtube, which penetrates the container and has both ends sealedly connected to the container; And an adjustable bracket, which includes multiple slide rails and multiple sliders, all of the slide rails are located on the same plane and are connected at one end to a point, each slider is slidably connected to a slide rail, all the sliders are arranged in a circle for the microtube to be wound around, and the sliders can change the tortuosity of the microtube by sliding along the slide rails.

2. A micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in claim 1, characterized in that: Each of the slide rails is located on a plurality of evenly spaced radii on the same circumference.

3. A micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in claim 1, characterized in that: The slider is slidably mounted on the slide rail, and the slider is also provided with a locking member, which can lock the slider at any position of the slide rail.

4. A micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in any one of claims 3, characterized in that: A locking groove is provided on one side of the slide rail, a positioning hole is provided on one side of the slide block, and the locking member is a locking bolt, which is threadedly connected to the positioning hole and can be pressed against the locking groove.

5. A micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in any one of claims 1 to 4, characterized in that: The longitudinal section of the slide rail is rectangular, the slider is provided with a rectangular slide groove, and the slider is sleeved on the slide rail through the slide groove.

6. A micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in any one of claims 1 to 4, characterized in that: The slide rail is provided with a length scale.

7. The micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in claim 1, characterized in that: It also includes two clamps, which are respectively installed on both sides of the container and coaxially arranged, each of the clamps includes a sealing bolt, an experimental pipeline and a sealing ring, the sealing bolt and the sealing ring are both arranged on the outer wall of the container, one end of the experimental pipeline passes through the sealing bolt and extends into the sealing ring, one end of the microtube is inserted into the experimental pipeline, and the sealing bolt clamps the sealing ring to seal the microtube and the experimental pipeline.

8. The micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in claim 1, characterized in that: Also included is a magnifying glass, which is embedded in the transparent observation window.

9. A micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in claim 8, characterized in that: A hook is also provided in the container, and the hook hooks the microtube so that the magnifying glass is aligned with the microtube.

10. The micro-nano percolation simulation device capable of heating, pressurizing and visualization as claimed in claim 1, characterized in that: The pressurizing hole is arranged at the top of the container, and a pressure sensor is provided on the pressurizing hole.

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