Shale gas reservoir gas content testing device

Abstract

The utility model discloses a gas content testing device for a shale gas reservoir, relates to the technical field of shale gas exploration, and solves the problems of low working efficiency and inaccurate measurement result caused by the fact that the existing measuring device needs to stand for several minutes for measurement after crushing residual gas. According to the technical scheme, a pulverizer is installed on the left side of a pulverizing box, a discharging plate is arranged on the right side of the pulverizing box and rotationally installed on the right side of the pulverizing box, a filtering box is arranged at the top of the pulverizing box, a plurality of filtering interlayers are arranged in the filtering box, a hose is arranged at the top of the filtering box, and one end of the hose communicates with a gas collecting box. According to the utility model, a plurality of filtering interlayers are arranged in the filtering box, so that the residual gas is filtered for three times, small particles such as crushed particles, dust and impurities in the residual gas are completely filtered, and finally, the pure residual gas enters the gas collecting box through the hose to be collected; and the measurement accuracy of the residual gas amount is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of shale gas exploration, and particularly relates to a shale gas reservoir gas content testing device. Background Art

[0002] Shale gas is natural gas extracted from shale layers, mainly located in dark mud shale or high-carbon mud shale. Shale gas is natural gas that exists in mudstone, high-carbon mudstone, shale and siltstone interlayers in an adsorbed or free state. In addition, my country has great potential for shale gas resources. According to preliminary estimates, the recoverable shale gas resources in my country are 36.1 trillion cubic meters. With the consumption of coal resources and the increasing attention to clean energy, my country will inevitably increase the exploitation and utilization of clean energy such as shale gas.

[0003] Shale is not only the source rock for natural gas generation, but also the reservoir and cap rock for the accumulation and preservation of natural gas. It exists in almost all basins, but has different industrial values ​​due to large differences in burial depth, gas saturation, etc. Therefore, it is necessary to measure the gas content of shale gas. The gas content of shale gas is a key parameter for the evaluation of shale gas reservoir resources, and its reliability directly affects the estimation accuracy of shale gas geological reserves in the early stage of exploration. The measurement of shale gas content includes lost gas volume, desorbed gas volume and residual gas volume. Among them, the method for measuring the residual gas volume is to put the shale sample after the desorption measurement into a sealed instrument or sealed tank, use a motor to stir and crush it, and let it stand for a few minutes to obtain the desorbed gas, which is the residual gas volume. However, this method is inefficient. When the motor does not stir evenly in the sealed tank, the shale will not be able to fully release the residual gas, resulting in inaccurate measurement. If the motor stirs evenly, a large amount of thick smoke will be generated inside the sealed tank during the stirring process. The residual gas is mixed with a large amount of impurities such as gravel particles, which need to be stationary for several minutes to separate from each other, resulting in low work efficiency. If the sealing of the sealed tank is poor at this time, a small amount of residual gas will overflow during the stationary process, resulting in inaccurate final measurement results.

[0004] Therefore, a shale gas reservoir gas content testing device is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a shale gas reservoir gas content testing device, so as to overcome the defects of the existing measuring device that after the residual gas volume is crushed, it needs to be stationary for several minutes before measuring, resulting in low work efficiency and inaccurate measurement results. The specific technical solution is as follows:

[0006] A shale gas reservoir gas content testing device comprises a crushing box, a crusher is installed on the left side of the crushing box, a discharge plate is provided on the right side of the crushing box, the discharge plate is rotatably installed on the right side of the crushing box, a handle is installed on the discharge plate, a filter box is provided on the top of the crushing box, a plurality of filter partitions are provided inside the filter box, a hose is provided on the top of the filter box, and one end of the hose is connected to a gas collecting box.

[0007] Preferably, the pulverizer is a reduction motor, a rotating shaft is rotatably mounted on the output shaft of the pulverizer, one end of the rotating shaft is rotatably mounted on the side wall of the pulverizing box through a bushing, and a cutting roller is mounted on the rotating shaft.

[0008] Preferably, the cutting roller is a cylindrical structure, the cutting roller is spirally wound and arranged on a rotating shaft, and sharp teeth are arranged at both the upper and lower ends of the cutting roller.

[0009] Preferably, the plurality of filter partitions include a first filter cavity, a second filter cavity is disposed on the top of the first filter cavity, and a third filter cavity is disposed on the top of the second filter cavity.

[0010] Preferably, the first filter chamber is connected to the second filter chamber, the second filter chamber is connected to the third filter chamber, and the top of the third filter chamber is connected to the hose.

[0011] Preferably, a first through hole is formed at the bottom of the first filter cavity, a second through hole is formed at the bottom of the second filter cavity, and a third through hole is formed at the bottom of the third filter cavity.

[0012] Preferably, a first filter net is disposed inside the first filter cavity, a second filter net is disposed inside the second filter cavity, and a third filter net is disposed inside the third filter cavity.

[0013] Preferably, the mesh density of the first filter screen is greater than the mesh density of the second filter screen, and the mesh density of the second filter screen is greater than the mesh density of the third filter screen.

[0014] Preferably, the mesh shape structures of the first filter screen, the second filter screen and the third filter screen are all triangular structures or polygonal structures.

[0015] Compared with the existing technology, the utility model has the following beneficial effects:

[0016] 1. In the utility model, a plurality of filter compartments are arranged inside the filter box, so that the residual gas volume achieves a three-time filtering effect, ensuring that the broken particles, dust, impurities and other tiny particles in the residual gas volume are completely filtered out, and finally the pure residual gas volume enters the gas collecting box through the hose and is collected, thereby improving the measurement accuracy of the residual gas volume. Compared with the traditional measuring device, which needs to be stationary for several minutes after the crushing is completed, it not only improves the measurement efficiency, but also ensures the accuracy of the measurement, thereby ensuring the work efficiency and work quality of the staff.

[0017] 2. The utility model is provided with a first filter screen, a second filter screen and a third filter screen with different mesh densities and regular shapes, which is conducive to filtering the residual gas layer by layer to improve the filtering effect of tiny particles such as broken particles, dust and impurities in the residual gas, and ensure that pure residual gas is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a schematic diagram of the overall front view structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the crushing box and the filtering box of the utility model.

[0021] Description of main reference numerals:

[0022] 1. Crushing box; 2. Crusher; 3. Discharging plate; 4. Handle; 5. Filter box; 6. Hose; 7. Air collecting box; 8. Rotating shaft; 9. Bushing; 10. Cutting roller; 11. First filter chamber; 12. Second filter chamber; 13. Third filter chamber; 14. First through hole; 15. Second through hole; 16. Third through hole; 17. First filter screen; 18. Second filter screen; 19. Third filter screen. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] A shale gas reservoir gas content testing device, such as Figure 1 to Figure 2As shown, it includes a crushing box 1, a crusher 2 is installed on the left side of the crushing box 1, a discharge plate 3 is arranged on the right side of the crushing box 1, the discharge plate 3 is rotatably installed on the right side of the crushing box 1, and a handle 4 is installed on the discharge plate 3. When the shale sample needs to be crushed, the discharge plate 3 is opened by pulling the handle 4, so that the shale sample can be placed in the crushing box 1, and finally the discharge plate 3 is closed for sealing.

[0025] The crusher 2 is a reduction motor. Compared with ordinary motors, the reduction motor has a larger torque, which is beneficial to improve the crushing efficiency of shale. A rotating shaft 8 is rotatably installed on the output shaft of the crusher 2. One end of the rotating shaft 8 is rotatably installed on the side wall of the crushing box 1 through a sleeve 9. A cutting roller 10 is installed on the rotating shaft 8. The cutting roller 10 is a cylindrical structure, and the cutting roller 10 is spirally wound on the rotating shaft 8. During crushing, the reduction motor is started to rotate the cutting roller 10 to roll and crush the shale deposited at the bottom of the crushing box 1. Furthermore, the upper and lower ends of the cutting roller 10 are provided with sharp teeth, which is beneficial to the crushing effect when crushing shale and ensures that the residual gas can be completely released.

[0026] A filter box 5 is arranged on the top of the crushing box 1, and a plurality of filter interlayers are arranged inside the filter box 5. The plurality of filter interlayers include a first filter chamber 11, a second filter chamber 12 is arranged on the top of the first filter chamber 11, a third filter chamber 13 is arranged on the top of the second filter chamber 12, the first filter chamber 11 and the second filter chamber 12 are communicated with each other, the second filter chamber 12 and the third filter chamber 13 are communicated with each other, the top of the third filter chamber 13 is communicated with the hose 6, one end of the hose 6 is communicated with the air collecting box 7, a first through hole 14 is provided at the bottom of the first filter chamber 11, a second through hole 15 is provided at the bottom of the second filter chamber 12, a third through hole 16 is provided at the bottom of the third filter chamber 13, a first filter screen 17 is provided inside the first filter chamber 11, a second filter screen 18 is provided inside the second filter chamber 12, and a third filter screen 19 is provided inside the third filter chamber 13.

[0027] Next, the working principle of the embodiment is described in detail to enable those skilled in the art to better understand the present invention:

[0028] After the shale is crushed in the crushing box 1, the residual gas is released from the crushed shale and gradually goes up through the first through hole 14 into the first filter 17 in the first filter chamber 11, thereby filtering out some of the broken particles, dust, and impurities mixed in the residual gas. Similarly, after the residual gas continues to go up, it finally enters the third filter 19 in the third filter chamber 13, achieving a three-time filtering effect, ensuring that the broken particles, dust, and impurities in the residual gas are completely filtered. Finally, the pure residual gas enters the gas collecting box 7 through the hose 6 and is collected, which is conducive to improving the accurate measurement of the residual gas. Compared with the traditional measuring device, which needs to be stationary for several minutes after the crushing is completed, it not only improves the measurement efficiency, but also ensures the accuracy of the measurement, and guarantees the work efficiency and work quality of the staff.

[0029] Furthermore, the mesh density of the first filter 17 is greater than the mesh density of the second filter 18, and the mesh density of the second filter 18 is greater than the mesh density of the third filter 19, which is beneficial to the layer-by-layer filtration of the residual gas volume, so as to improve the filtering effect of the broken particles, dust, impurities and other tiny particles in the residual gas volume, and ensure that the pure residual gas volume is obtained; the mesh shape structure of the first filter 17, the second filter 18 and the third filter 19 are all triangular structures or polygonal structures, and the triangular structure or polygonal structure can be an irregular structural shape to avoid the broken particles, dust, impurities and other tiny particles in the residual gas volume from causing complete blockage to them, and ensure the permeability of a certain structural space, that is, when the broken particles, dust, impurities and other tiny particles in the residual gas volume cause blockage to the triangular structure or the polygonal structure, due to its irregular shape, there can still be a permeability similar to the corners, so that the residual gas volume can pass through without causing complete blockage.

[0030] In summary, by arranging multiple filter compartments inside the filter box 5, the residual gas volume can achieve a three-time filtering effect, ensuring that the broken particles, dust, impurities and other tiny particles in the residual gas volume are completely filtered out, and finally the pure residual gas volume enters the collecting box 7 through the hose 6 and is collected, thereby improving the measurement accuracy of the residual gas volume. Compared with the traditional measuring device, which needs to be stationary for several minutes after the crushing is completed, it not only improves the measurement efficiency, but also ensures the accuracy of the measurement, and ensures the work efficiency and work quality of the staff; at the same time, the first filter 17, the second filter 18 and the third filter 19 with different mesh densities and regular shapes are set, which is conducive to filtering the residual gas layer by layer, so as to improve the filtering effect of the broken particles, dust, impurities and other tiny particles in the residual gas volume, and ensure that the pure residual gas volume is obtained.

[0031] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A shale gas reservoir gas content testing device, characterized in that: The invention comprises a crushing box (1), a crusher (2) is installed on the left side of the crushing box (1), a discharge plate (3) is arranged on the right side of the crushing box (1), the discharge plate (3) is rotatably installed on the right side of the crushing box (1), a handle (4) is installed on the discharge plate (3), a filter box (5) is arranged on the top of the crushing box (1), a plurality of filter partitions are arranged inside the filter box (5), a hose (6) is arranged on the top of the filter box (5), and one end of the hose (6) is connected to an air collecting box (7).

2. A shale gas reservoir gas content testing device according to claim 1, characterized in that: The pulverizer (2) is a reduction motor. A rotating shaft (8) is rotatably mounted on the output shaft of the pulverizer (2). One end of the rotating shaft (8) is rotatably mounted on the side wall of the pulverizing box (1) through a shaft sleeve (9). A cutting roller (10) is mounted on the rotating shaft (8).

3. A shale gas reservoir gas content testing device according to claim 2, characterized in that: The cutting roller (10) is a cylindrical structure. The cutting roller (10) is spirally wound and arranged on a rotating shaft (8). The upper and lower ends of the cutting roller (10) are both provided with sharp teeth.

4. A shale gas reservoir gas content testing device according to claim 1, characterized in that: The plurality of filter partitions comprise a first filter cavity (11), a second filter cavity (12) is arranged on the top of the first filter cavity (11), and a third filter cavity (13) is arranged on the top of the second filter cavity (12).

5. A shale gas reservoir gas content testing device according to claim 4, characterized in that: The first filter chamber (11) and the second filter chamber (12) are in communication with each other, the second filter chamber (12) and the third filter chamber (13) are in communication with each other, and the top of the third filter chamber (13) is in communication with the hose (6).

6. A shale gas reservoir gas content testing device according to claim 5, characterized in that: The bottom of the first filter cavity (11) is provided with a first through hole (14), the bottom of the second filter cavity (12) is provided with a second through hole (15), and the bottom of the third filter cavity (13) is provided with a third through hole (16).

7. A shale gas reservoir gas content testing device according to claim 6, characterized in that: A first filter screen (17) is arranged inside the first filter cavity (11), a second filter screen (18) is arranged inside the second filter cavity (12), and a third filter screen (19) is arranged inside the third filter cavity (13).

8. A shale gas reservoir gas content testing device according to claim 7, characterized in that: The mesh density of the first filter screen (17) is greater than the mesh density of the second filter screen (18), and the mesh density of the second filter screen (18) is greater than the mesh density of the third filter screen (19).

9. A shale gas reservoir gas content testing device according to claim 8, characterized in that: The mesh shape structures of the first filter screen (17), the second filter screen (18) and the third filter screen (19) are all triangular structures or polygonal structures.

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