A simulation pipeline device for underground fluid test

Abstract

The present invention relates to the technical field of underground fluid testing, and more specifically, to a simulation pipeline device for underground fluid testing, including an aquifer simulation mechanism, a well pipe simulation mechanism, a flow discharge mechanism, a water head simulation mechanism and a pressure simulation mechanism, wherein the well pipe simulation mechanism, the water head simulation mechanism and the pressure simulation mechanism are all connected to the aquifer simulation mechanism, and the flow discharge mechanism is connected to the well pipe simulation mechanism; the aquifer simulation mechanism includes a box and a filling layer, a cover plate is arranged on the top of the box, the well pipe simulation mechanism and the water head simulation mechanism can be detachably connected to the top of the box, and the filling layer is arranged in the box. By inputting pressure into the pressure simulation mechanism, simulating solid tides, seismic waves, etc., a simulation test is performed on the underground aquifer, and a simulation experiment can be performed on the cause of real water level abnormality under experimental conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of underground fluid testing, and more specifically, to a simulation pipeline device for underground fluid testing. Background Art

[0002] In daily work, due to the limitations of the on-site environment, it is often impossible to verify abnormal wellbore conditions in real on-site wells, as well as to measure parameters such as permeability coefficients, resulting in many test methods being unable to be carried out on-site.

[0003] In order to be able to simulate the layout of the test site and the lithology of the aquifers and pipeline structures of each well so as to find and judge abnormal problems in real wellbores, a simulation device is needed. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a simulation pipeline device for underground fluid testing, which can conduct simulation experiments under experimental conditions and facilitate the analysis of the causes of water level abnormalities.

[0005] A simulation pipeline device for underground fluid testing, comprising an aquifer simulation mechanism, the aquifer simulation mechanism comprising a box and a filling layer, the box being detachably connected to a well pipe simulation mechanism for observing water level changes and a water head simulation mechanism for water injection, the well pipe simulation mechanism and the water head simulation mechanism both being connected to the inside of the box, the well pipe simulation mechanism being connected to a discharge mechanism for water discharge;

[0006] The side wall of the box is connected to a pressure simulation mechanism for simulating a fluid fluctuation state;

[0007] The filling layer is arranged in the box body, and the box body is provided with a cover plate for placing or taking out the filling layer.

[0008] Furthermore, the well pipe simulation mechanism includes a first pipe body and a filter layer, the first pipe body is detachably connected to the box body, and the filter layer is fixedly connected to the bottom end of the first pipe body.

[0009] Furthermore, the well pipe simulation mechanism includes a first pipe body and a sealing plate, the first pipe body is detachably connected to the box body, the sealing plate is fixedly connected to the bottom end of the first pipe body, and the side wall of the first pipe body near the bottom is provided with a plurality of circumferentially evenly distributed through holes.

[0010] Furthermore, the side wall of the first tube is fixedly connected to a plurality of circumferentially arranged elastic components, and an operating ring surrounding the first tube is arranged on the upper part of the elastic component.

[0011] Furthermore, the top wall of the box body is fixedly connected to a buckle ring, and the elastic component is clamped on the buckle ring.

[0012] Furthermore, the elastic component includes an elastic plate hinged to the side wall of the first tube body, a spring is fixedly connected between the elastic plate and the first tube body, and a protrusion is fixedly connected to the bottom side wall of the elastic plate, and the protrusion is away from the outer side wall of the first tube body.

[0013] Furthermore, a groove matching the protrusion is formed on the inner side wall of the buckle ring.

[0014] Furthermore, the top wall of the box body is fixedly connected to a sleeve, and the water head simulation mechanism includes a second tube body, and the second tube body is plugged into the sleeve.

[0015] Furthermore, the drainage mechanism comprises a third tube body, an elbow and a drainage pipe which are connected in sequence; the third tube body is vertically fixedly connected to the side wall of the first tube body; and a valve is provided on the third tube body.

[0016] Furthermore, the cover plate is fixedly connected to the first slide groove, the top wall of the box body is fixedly connected to the second slide groove, the first slide groove is communicated with the second slide groove, and the first slide groove or the second slide groove is slidably connected to the handle.

[0017] The response of underground fluid well water level to stress-strain is mainly manifested in the response of the well water level to the earth's solid tide, the response to seismic waves, and the response to body strain. Due to the change of ground stress-strain, the solid skeleton of the filling layer in the box is deformed, and the pore pressure of the pressurized aquifer increases or decreases, causing the pore water to flow between the water in the first pipe body and the aquifer, thereby causing the water level in the first pipe body and the box body to rise and fall. The inflation pressure value is input through the air pump, and the solid tide, seismic wave and other signals are artificially simulated to simulate the rise and fall of the water level in the first pipe body under different solid skeleton conditions.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] ① Due to the provision of the aquifer simulation mechanism, the well pipe simulation mechanism, the discharge mechanism, the water head simulation mechanism and the pressure simulation mechanism, by inputting pressure into the pressure simulation mechanism to simulate solid tides, seismic waves, etc., a simulation test is conducted on the underground aquifer, and a simulation experiment can be conducted on the cause of real water level anomalies under experimental conditions.

[0020] ② The filling layer is arranged in the box body, and the appropriate filler is selected according to Darcy's law. By replacing different filling materials, the solid skeleton of the aquifer with different permeability coefficients is simulated. The first tube body is arranged in two forms: side wall water inlet and bottom filtration water inlet. Different water inlet forms can be selected according to the filling layer of different fillers, and the application range is wide.

[0021] ③ Since an elastic plate is arranged on the side wall of the first tube body, the top wall of the box body is fixedly connected to the snap ring, and the protrusion fixedly connected to the bottom of the elastic plate can be snapped into the groove on the inner wall of the snap ring, so that the first tube body is connected and fixed to the box body, which is convenient for installation and time-saving and labor-saving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the simulation pipeline device used for underground fluid testing in this embodiment.

[0024] Figure 2 It is a schematic diagram of the first tube body structure in Example 1.

[0025] Figure 3 It is a schematic diagram of the first tube structure in the second embodiment.

[0026] Figure 4 Schematic diagram of the buckle ring structure of the simulated pipeline device used for underground fluid testing in this embodiment.

[0027] Figure 5 It is a schematic diagram of the structure of the simulated pipeline device for underground fluid testing in this embodiment after the cover plate is opened.

[0028] Figure 6 Schematic diagram of the handle structure of the simulated pipeline device for underground fluid testing in this embodiment.

[0029] Figure 7 Schematic diagram of the elastic component structure of the simulated pipeline device used for underground fluid testing in this embodiment.

[0030] Figure 8 It is a schematic diagram of the structure after the well pipe of the simulation pipeline device for underground fluid test in this embodiment is connected to the box.

[0031] In the figure: 1. box body; 2. filling layer; 3. cover plate; 4. first tube body; 5. filter layer; 6. elastic component; 601. elastic plate; 602. spring; 603. protrusion; 7. operating ring; 8. snap ring; 9. groove; 10. sleeve; 11. second tube body; 12. third tube body; 13. elbow; 14. drain pipe; 15. valve; 16. air pump; 17. quick connector; 18. sealing strip; 19. first slide groove; 20. second slide groove; 21. handle; 22. sealing plate; 23. through hole. DETAILED DESCRIPTION

[0032] 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.

[0033] Embodiment 1:

[0034] This embodiment provides a simulation pipeline device for underground fluid testing, such as Figure 1 As shown, it includes an aquifer simulation mechanism, a well pipe simulation mechanism, a discharge mechanism, a water head simulation mechanism and a pressure simulation mechanism. The well pipe simulation mechanism, the water head simulation mechanism and the pressure simulation mechanism are all connected to the aquifer simulation mechanism, and the discharge mechanism is connected to the well pipe simulation mechanism; the pipeline simulation of the dynamic water level and the static water level is completed through the interconnected mechanisms.

[0035] Specifically, the aquifer simulation mechanism includes a box 1 and a filling layer 2. A cover plate 3 is provided on the top of the box 1. The well pipe simulation mechanism and the water head simulation mechanism can be detachably connected to the box 1. The filling layer 2 is provided in the box 1. The cover plate 3 can be opened to fill the filling layer 2 into the box 1. According to the lithology of the aquifer, suitable filling layer 2 materials, such as gravel, sand, sand layer, etc., are added to simulate the lithology of various aquifers. The filling layer 2 is set to be multi-layered, and different materials are filled for aquifers of different well depths according to the wellbore column chart. The filling layer 2 simulates a real underground fluid aquifer according to different lithology. The main principle is the size of the porosity. It is filled with real lithology materials or sand, gravel, etc. with the same proportion as the real rock layer, so that the permeability rate of the filling layer 2 is the same as the real lithology, so as to simulate the daily changes of the water level monitored daily.

[0036] like Figure 2 As shown, the well pipe simulation mechanism is used to simulate water level changes, which includes a first pipe body 4 and a filter layer 5. The first pipe body 4 penetrates the top wall of the box body 1, so that a part of the first pipe body 4 extends out of the box body 1 and the other part enters the inside of the box body 1. Figure 8 The filter layer 5 is fixedly connected to the bottom end of the first pipe body 4, and the water in the box body 1 enters the first pipe body 4 after being filtered by the filter layer 5. In the static water level well pipe simulation structure, an opening and closing valve (not shown in the figure) is provided on the first pipe body 4, which can be operated to close the static water level pipeline when the water level rises to prevent water from overflowing.

[0037] The side wall of the first tube body 4 is fixedly connected to a plurality of circumferentially arranged elastic components 6. An operating ring 7 surrounding the first tube body 4 is arranged on the upper part of the elastic component 6. When the operating ring 7 is applied downward, the bottom end of the elastic component 6 can abut against the outer wall of the first tube body 4. The top wall of the box body 1 is fixedly connected to a buckle ring 8. The elastic component 6 is clamped on the buckle ring 8, so that the first tube body 4 can be firmly connected to the top of the box body 1. The elastic component 6 includes an elastic plate 601 hinged to the side wall of the first tube body 4, see Figure 7 The spring 602 is fixedly connected between the elastic plate 601 and the first tube body 4. The spring 602 is arranged perpendicular to the side wall of the first tube body 4. Under the action of the spring 602, the bottom of the elastic plate 601 is separated from the first tube body 4. The side wall of the bottom end of the elastic plate 601 is fixedly connected to the protrusion 603. The protrusion 603 is away from the outer wall of the first tube body 4. When the spring 602 drives the elastic plate 601 away from the tube wall of the first tube body 4, the protrusion 603 moves away from the tube wall of the first tube body 4 with the elastic plate 601. The inner wall of the buckle ring 8 is provided with a groove 9 adapted to the protrusion 603, see Figure 4 , the first tube body 4 is brought close to the buckle ring 8, the operating ring 7 is applied downward to make the bottom of the elastic plate 601 abut against the tube wall of the first tube body 4, the bottom of the elastic plate 601 enters the gap between the buckle ring 8 and the first tube body 4, the operating ring 7 is moved upward to make the elastic plate 601 disengage from the limit of the operating ring 7, and the protrusion 603 at the bottom of the elastic plate 601 enters the groove 9, and the connection between the first tube body 4 and the box body 1 is completed. The protrusion 603 and the groove 9 are both set as trapezoidal bodies, so that the concave area in the middle of the groove 9 is larger than the concave areas on both sides. The first tube body 4 is rotated to rotate the protrusion 603 out of the groove 9, and then the operating ring 7 is applied downward. Under the joint action, the first tube body 4 can be separated from the buckle ring 8, thereby completing the disassembly or replacement of the first tube body 4. In order to prevent water leakage, a sealing ring is set on the top of the box body 1, and the sealing ring is set between the outer wall of the first tube body 4 and the inner wall of the buckle ring 8 and below the groove 9. The actual pipeline measured in the test is 1-2 kilometers long and 20 cm in diameter. The simulated pipeline in this embodiment is designed with a pipeline length of 100:1, and each section of the pipeline is 2 meters long and 20 cm in diameter. The static water level pipeline is made of stainless steel, preferably glass, and the dynamic water level pipeline is made of glass to observe the water level line. At the same time, a measuring ruler is installed on the laid pipeline.

[0038] The top wall of the box body 1 is fixedly connected to the sleeve 10, and the water head simulation mechanism includes a second tube body 11, which is inserted into the sleeve 10, and water is injected into the box body 1 through the second tube body 11. The setting height of the second tube body 11 is higher than the setting height of the first tube body 4.

[0039] The discharge mechanism includes a third pipe body 12, an elbow 13 and a discharge pipe 14 connected in sequence. In the well pipe simulation structure of the dynamic water level, the side of the first pipe body 4 is fixedly connected to the third pipe body 12, the elbow 13 and the discharge pipe 14, and a valve 15 is installed on the third pipe body 12. When the valve 15 is opened, the discharge device has the function of opening a hole to discharge water, and adjusting the rotation angle of the valve 15 on the third pipe body 12 can control the size of the water flow rate.

[0040] The pressure simulation mechanism is arranged on a side wall of the box 1 to input pressure into the box 1 to simulate the pressure in the aquifer. The pressure simulation mechanism includes an air pump 16, a quick connector 17 is welded to the side wall of the box 1, and the output end of the air pump 16 is detachably connected to the quick connector 17. By controlling the air pump 16, air pressures of different cycles can be input into the box 1 to drive the extrusion and stretching of the filling layer 2 inside the box 1, thereby simulating the change of solid tide and thus simulating the change of pressure.

[0041] like Figure 5 As shown, the cover plate 3 is a rectangular plate, one side of which is hinged to the top wall of the box body 1. The box body 1 is provided with an opening for installing the cover plate 3, and the opening is fixedly connected to a sealing strip 18 to increase the tightness. The top surface of the cover plate 3 is fixedly connected to a first slide groove 19 at one end away from the hinge, see Figure 6 The top wall of the box body 1 is fixedly connected to the second slide groove 20, the first slide groove 19 is connected to the second slide groove 20, the first slide groove 19 or the second slide groove 20 is slidably connected to the handle 21, and the handle 21 is slid between the first slide groove 19 and the second slide groove 20 to limit the cover plate 3 so that the cover plate 3 is closed to the top of the box body 1, and the handle 21 is slid to the first slide groove 19 to make the cover plate 3 disengage from the limit, so that the cover plate 3 can be opened.

[0042] Embodiment 2:

[0043] like Figure 3 As shown, the difference from the first embodiment lies in the well pipe simulation mechanism, which includes a first pipe body 4 and a sealing plate 22. The sealing plate 22 is fixedly connected to the bottom end of the first pipe body 4. The side wall of the first pipe body 4 near the bottom is provided with a plurality of circumferentially evenly distributed through holes 23. The water in the box body 1 enters the first pipe body 4 through the through holes 23.

[0044] During the overall assembly, select the box body 1, open the cover plate 3, and add the filling layer 2 into the box body 1. Then, install the first tube body 4 and the second tube body 11 on the top of the box body 1 respectively, inject water into the box body 1 through the second tube body 11, connect the air pump 16 to the quick connector 17; turn on the air pump 16 and adjust the input pressure value; place a digital sensor in the first tube body 4 to record the water level change data.

[0045] The working principle of the simulation pipeline device for underground fluid testing in this embodiment is: the response of the underground fluid well water level to stress-strain is mainly manifested in the response of the well water level to the earth's solid tide, the response to seismic waves and the response to body strain. Due to the change of ground stress-strain, the solid skeleton of the filling layer 2 in the box 1 is deformed, and the pore pressure of the pressurized aquifer increases or decreases, causing the pore water to flow between the water in the first pipe body 4 and the aquifer, thereby causing the water level in the first pipe body 4 and the box 1 to rise and fall. The inflation pressure value is input through the inflation pump 16, and the solid tide, seismic wave and other signals are artificially simulated to simulate the rise and fall of the water level in the first pipe body 4 under different solid skeleton conditions.

[0046] In the simulation pipeline device for underground fluid test of this embodiment, due to the provision of an aquifer simulation mechanism, a well pipe simulation mechanism, a discharge mechanism, a water head simulation mechanism and a pressure simulation mechanism, by inputting pressure into the pressure simulation mechanism, simulating solid tides, seismic waves, etc., a simulation test is performed on the underground aquifer, and a simulation experiment can be performed on the cause of real water level anomaly under experimental conditions. A filling layer 2 is provided in the box body 1, and a suitable filler is selected according to Darcy's law. By replacing different filling materials, the solid skeleton of the aquifer with different permeability coefficients is simulated. The first tube body 4 is provided with two forms of side wall water inlet and bottom filtration water inlet, and different water inlet forms can be selected according to the filling layer 2 of different fillers, and the application range is wide. Since the side wall of the first tube body 4 is provided with an elastic plate 601, the top wall of the box body 1 is fixedly connected to the buckle ring 8, and the protrusion 603 fixedly connected to the bottom of the elastic plate 601 can be clamped in the groove 9 on the inner wall of the buckle ring 8, so that the first tube body 4 is connected and fixed to the box body 1, which is convenient for installation and time-saving and labor-saving operation.

[0047] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. 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 simulated pipeline device for underground fluid testing, characterized in that: The aquifer simulation mechanism comprises a box (1) and a filling layer (2); the box (1) is detachably connected to a well pipe simulation mechanism for observing water level changes and a water head simulation mechanism for water injection; the well pipe simulation mechanism and the water head simulation mechanism are both connected to the inside of the box (1); the well pipe simulation mechanism is connected to a discharge mechanism for water discharge; The side wall of the box (1) is connected to a pressure simulation mechanism for simulating a fluid fluctuation state; the pressure simulation mechanism is arranged on a side wall of the box (1) to input pressure into the box (1) to simulate the pressure in the aquifer; the pressure simulation mechanism comprises an air pump (16), a quick connector (17) is welded to the side wall of the box (1), and the output end of the air pump (16) is detachably connected to the quick connector (17); by controlling the air pump (16), air pressures of different cycles can be input into the box (1), thereby driving the extrusion and stretching of the filling layer (2) inside the box (1), so as to simulate the change of solid tide and the change of pressure; The filling layer (2) is arranged in the box body (1), and the box body (1) is provided with a cover plate (3) for placing or removing the filling layer (2).

2. The simulated pipeline device for underground fluid testing according to claim 1, characterized in that: The well pipe simulation mechanism comprises a first pipe body (4) and a filter layer (5); the first pipe body (4) is detachably connected to the box body (1); and the filter layer (5) is fixedly connected to the bottom end of the first pipe body (4).

3. The simulated pipeline device for underground fluid testing according to claim 1, characterized in that: The well pipe simulation mechanism comprises a first pipe body (4) and a sealing plate (22); the first pipe body (4) is detachably connected to the box body (1); the sealing plate (22) is fixedly connected to the bottom end of the first pipe body (4); and a plurality of circumferentially evenly distributed through holes (23) are provided on the side wall of the first pipe body (4) near the bottom.

4. The simulated pipeline device for underground fluid testing according to claim 2 or 3, characterized in that: The side wall of the first tube (4) is fixedly connected to a plurality of circumferentially arranged elastic components (6), and an operating ring (7) surrounding the first tube (4) is arranged on the upper part of the elastic component (6).

5. The simulated pipeline device for underground fluid testing according to claim 4, characterized in that: The top wall of the box body (1) is fixedly connected to a snap ring (8), and the elastic component (6) is snapped onto the snap ring (8).

6. The simulated pipeline device for underground fluid testing according to claim 5, characterized in that: The elastic component (6) comprises an elastic plate (601) hinged to the side wall of the first tube body (4), a spring (602) is fixedly connected between the elastic plate (601) and the first tube body (4), and a protrusion (603) is fixedly connected to the side wall of the bottom end of the elastic plate (601), and the protrusion (603) is away from the outer side wall of the first tube body (4).

7. The simulated pipeline device for underground fluid testing according to claim 6, characterized in that: The inner side wall of the buckle ring (8) is provided with a groove (9) adapted to the protrusion (603).

8. The simulated pipeline device for underground fluid testing according to claim 7, characterized in that: The top wall of the box body (1) is fixedly connected to a sleeve (10), and the water head simulation mechanism comprises a second tube body (11), and the second tube body (11) is plugged into the sleeve (10).

9. The simulated pipeline device for underground fluid testing according to claim 8, characterized in that: The drainage mechanism comprises a third tube body (12), an elbow (13) and a drainage pipe (14) which are connected in sequence; the third tube body (12) is vertically fixedly connected to the side wall of the first tube body (4); and a valve (15) is provided on the third tube body (12).

10. The simulated pipeline device for underground fluid testing according to claim 9, characterized in that: The cover plate (3) is fixedly connected to the first slide groove (19), the top wall of the box body (1) is fixedly connected to the second slide groove (20), the first slide groove (19) is connected to the second slide groove (20), and the first slide groove (19) or the second slide groove (20) is slidably connected to the handle (21).

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