Adsorption and storage device for pore permeability test of shale gas stratum sample experiment

Abstract

The utility model provides an adsorption and storage device for a shale gas stratum sample experiment pore permeability test. The adsorption and storage device comprises a storage box, a sealing plate is slidably mounted in the storage box, the sealing plate is slidably and hermetically connected with the inner wall of the storage box, a connecting pipe is arranged at the top of the storage box, a plugging block is arranged at the top of the sealing plate, and the sealing plate is slidably and hermetically connected with the inner wall of the storage box. The top of the plugging block is located in the connecting pipe, a second valve is arranged on the connecting pipe, and a first valve is arranged on one side of the connecting pipe. The adsorption and storage device for the pore permeability test of the shale gas stratum sample experiment has the advantages that the use is convenient, and the purity of the collected shale gas sample is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of shale gas formation samples, in particular to an adsorption storage device used for experimental porosity and permeability testing of shale gas formation samples. Background Art

[0002] Shale gas refers to natural gas of biological origin, pyrolysis origin or a mixture of the two that is rich in organic matter, mature dark mud shale or high-carbon mud shale. Due to the adsorption of organic matter or the existence of cracks and matrix pores in the rock, it stores and preserves certain commercially valuable natural gas. When testing shale gas formations, it is necessary to sample, store and transport the shale gas formations.

[0003] At present, when shale gas samples are stored, it is easy for the air in the storage box to not be exhausted completely, resulting in the shale gas samples being easily mixed with air when stored in the storage box.

[0004] Therefore, it is necessary to provide a new adsorption storage device for shale gas formation sample experimental porosity test to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide an adsorption storage device for shale gas formation sample experimental porosity test, which is easy to use and has high purity of collected shale gas samples.

[0006] In order to solve the above-mentioned technical problems, the utility model provides an adsorption storage device for experimental porosity testing of shale gas formation samples, including: a storage box, a sealing plate slidably installed in the storage box, the sealing plate is slidably and sealedly connected to the inner wall of the storage box, a connecting pipe is provided on the top of the storage box, a sealing block is provided on the top of the sealing plate, the top of the sealing block is located in the connecting pipe, a second valve is provided on the connecting pipe, and a first valve is provided on one side of the connecting pipe.

[0007] Preferably, an exhaust hole is provided on the bottom inner wall of the storage box.

[0008] Preferably, a telescopic mechanism is fixedly mounted on the inner wall of the bottom of the storage box, and the telescopic mechanism is connected to the sealing plate.

[0009] Preferably, the telescopic mechanism includes two sleeves, a telescopic rod is slidably installed in the sleeve, the top of the telescopic rod extends outside the sleeve and is fixed to the bottom of the sealing plate, and a spring is fixedly installed in the sleeve, and the two ends of the spring are respectively fixedly connected to the bottom end of the telescopic rod and the bottom inner wall of the sleeve.

[0010] Preferably, a limit plate is fixedly mounted on the bottom end of the telescopic rod, and the top end of the spring is fixedly connected to the limit plate.

[0011] Compared with the related art, the adsorption storage device for shale gas formation sample experimental porosity test provided by the utility model has the following beneficial effects:

[0012] The utility model provides an adsorption storage device for experimental porosity and permeability testing of shale gas formation samples. Through a telescopic mechanism composed of a casing, a telescopic rod, a limit plate and a spring, when the shale gas sample is not stored in or out of the storage box, the sealing plate can be brought into contact with the top inner wall of the storage box to push the blocking block into the connecting pipe, thereby exhausting the air in the storage box. At the same time, in conjunction with the arrangement of the first valve, the blocking block and the sealing plate, when the shale gas sample is stored, the air in the connecting pipe can be exhausted by opening the first valve, thereby ensuring to a large extent that the impurities in the shale gas sample entering the storage box are small. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a preferred embodiment of an adsorption storage device for shale gas formation sample experimental porosity test provided by the utility model;

[0014] Figure 2 for Figure 1 The cross-sectional structural diagram is shown.

[0015] Numbers in the figure: 1. storage box, 2. sealing plate, 3. connecting pipe, 4. blocking block, 5. first valve, 6. second valve, 7. sleeve, 8. telescopic rod, 9. limit plate, 10. spring, 11. exhaust hole. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0017] Please refer to Figure 1 and Figure 2 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of an adsorption storage device for shale gas formation sample experimental porosity test provided by the utility model; Figure 2 for Figure 1The schematic diagram of the cross-sectional structure is shown. The adsorption storage device for experimental porosity test of shale gas formation samples includes: a storage box 1, a sealing plate 2 is slidably installed in the storage box 1, the sealing plate 2 is slidably and sealedly connected to the inner wall of the storage box 1, the outer fixed sleeve of the sealing plate 2 is provided with a first sealing sleeve, the first sealing sleeve is in contact with the inner wall of the storage box 1, the top of the storage box 1 is provided with a connecting pipe 3, the top of the sealing plate 2 is provided with a blocking block 4, the top of the blocking block 4 is located in the connecting pipe 3, the outer fixed sleeve of the blocking block 4 is provided with a second sealing sleeve, the second sealing sleeve is in contact with the inner wall of the connecting pipe 3, the connecting pipe 3 is provided with a second valve 6, and one side of the connecting pipe 3 is provided with a first valve 5, the first valve 5 is adapted to the blocking block 4.

[0018] An exhaust hole 11 is provided on the inner wall of the bottom of the storage box 1. The exhaust hole 11 can prevent excessive pressure in the area below the sealing plate 2 in the storage box 1 during the downward movement of the sealing plate 2, so that the sealing plate 2 can move downward normally.

[0019] A telescopic mechanism is fixedly mounted on the inner wall of the bottom of the storage box 1 , and the telescopic mechanism is connected to the sealing plate 2 .

[0020] The telescopic mechanism includes two sleeves 7, a telescopic rod 8 is slidably installed in the sleeve 7, the top of the telescopic rod 8 extends to the outside of the sleeve 7 and is fixed to the bottom of the sealing plate 2, and a spring 10 is fixedly installed in the sleeve 7, and the two ends of the spring 10 are fixedly connected to the bottom end of the telescopic rod 8 and the bottom inner wall of the sleeve 7 respectively.

[0021] A limit plate 9 is fixedly mounted on the bottom end of the telescopic rod 8 , and the top end of the spring 10 is fixedly connected to the limit plate 9 .

[0022] The working principle of the adsorption storage device for shale gas formation sample experimental porosity test provided by the utility model is as follows:

[0023] First, connect the connecting pipe 3 to the shale gas collection pump, and then open the second valve 6 and the first valve 5. At this time, the shale gas enters through the second valve 6 and is discharged through the first valve 5. This process can discharge the air above the sealing block 4 in the connecting pipe 3 as much as possible. When the air in the connecting pipe 3 is exhausted, close the first valve 5. As the pressure in the connecting pipe 3 gradually increases, the shale gas pushes the sealing plate 2 to move downward, the sealing plate 2 pushes the telescopic rod 8 to move downward in the casing 7, the telescopic rod 8 pushes the limit plate 9 to move downward, and the spring 10 is compressed. After the shale gas sample is collected, close the second valve 6. At this time, the collection of the shale gas sample is completed, and the impurities in the collected shale gas sample are relatively small.

[0024] Compared with the related art, the adsorption storage device for shale gas formation sample experimental porosity test provided by the utility model has the following beneficial effects:

[0025] The utility model provides an adsorption storage device for experimental porosity and permeability testing of shale gas formation samples. Through a telescopic mechanism composed of a casing 7, a telescopic rod 8, a limit plate 9 and a spring 10, when the shale gas sample is not stored in or out of the storage box 1, the sealing plate 2 can be brought into contact with the top inner wall of the storage box 1, so that the blocking block 4 is pushed into the connecting pipe 3, thereby the air in the storage box 1 can be discharged. At the same time, in conjunction with the arrangement of the first valve 5, the blocking block 4 and the sealing plate 2, when the shale gas sample is stored, the air in the connecting pipe 3 can be discharged by opening the first valve 5, thereby ensuring to a large extent that the impurities of the shale gas sample entering the storage box 1 are small.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An adsorption storage device for shale gas formation sample experimental porosity test, characterized in that: include: A storage box, wherein a sealing plate is slidably installed inside the storage box, wherein the sealing plate is slidably and sealedly connected to the inner wall of the storage box, a connecting pipe is provided on the top of the storage box, a sealing block is provided on the top of the sealing plate, the top of the sealing block is located in the connecting pipe, a second valve is provided on the connecting pipe, and a first valve is provided on one side of the connecting pipe.

2. The adsorption storage device for shale gas formation sample experimental porosity test according to claim 1, characterized in that: An exhaust hole is arranged on the inner wall of the bottom of the storage box.

3. The adsorption storage device for shale gas formation sample experimental porosity test according to claim 1, characterized in that: A telescopic mechanism is fixedly mounted on the inner wall of the bottom of the storage box, and the telescopic mechanism is connected to the sealing plate.

4. The adsorption storage device for shale gas formation sample experimental porosity test according to claim 3 is characterized in that: The telescopic mechanism includes two sleeves, a telescopic rod is slidably installed in the sleeve, the top of the telescopic rod extends outside the sleeve and is fixed to the bottom of the sealing plate, a spring is fixedly installed in the sleeve, and the two ends of the spring are respectively fixedly connected to the bottom end of the telescopic rod and the bottom inner wall of the sleeve.

5. The adsorption storage device for shale gas formation sample experimental porosity test according to claim 4, characterized in that: A limit plate is fixedly mounted on the bottom end of the telescopic rod, and the top end of the spring is fixedly connected to the limit plate.

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