CN113155388B - Device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage reservoir under fault action - Google Patents
Device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage reservoir under fault action Download PDFInfo
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- CN113155388B CN113155388B CN202110451302.0A CN202110451302A CN113155388B CN 113155388 B CN113155388 B CN 113155388B CN 202110451302 A CN202110451302 A CN 202110451302A CN 113155388 B CN113155388 B CN 113155388B
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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Abstract
The invention relates to the technical field of salt rock gas reservoirs, in particular to a device for simulating vibration deformation of a sandwich cavity wall of a salt rock gas reservoir under the action of faults, which comprises vibration equipment for providing a vibration source, a box body arranged on the vibration equipment and a strain gauge connected with external detection equipment, wherein the box body is internally provided with a cavity body which is arranged in a sealing manner, a fault lower disc test block and a rock sample with the gas reservoir are arranged in the cavity body, a gas injection pipe communicated with the gas reservoir in the rock sample is arranged on the box body, the strain gauge is arranged on the rock sample, a gap is reserved between the rock sample and the fault lower disc test block and the cavity body, and when the device is used, gas is injected into the gas reservoir of the rock sample through the gas injection pipe, the vibration equipment drives the box body to vibrate, the rock sample and the fault lower disc test block are enabled to displace in the cavity body and squeeze each other, the vibration condition of the fault cavity wall of the salt rock gas reservoir can be simulated under the action of the faults, and experimental basis is provided for the damage degree of the cavity wall through recording the strain gauge parameters.
Description
Technical Field
The invention relates to the technical field of salt rock gas reservoirs, in particular to a device for simulating vibration deformation of a sandwich cavity wall of a salt rock gas reservoir under the action of faults.
Background
The underground salt rock gas storage is used as one of the main modes of energy storage, has the characteristics of large monomer volume, wide burial depth distribution, complex geological conditions and the like, and in the increase of the consumption of Chinese natural gas, the capacity and the scale of the gas storage are urgently required to be increased. However, the rock salt resources of china are mainly distributed in the cutting zone or half-basin, and there are usually many structural fracture zones. Near faults in the underground salt rock reservoirs, the security of the cavern faces serious challenges. And the salt rock reservoir built or under construction in China is mainly positioned in an earthquake-resistant fortification area, and the layered salt rock reservoir can be subjected to strong earthquake action during construction and operation. Meanwhile, the gas stored in the salt cavern has the characteristics of high pressure, inflammability and explosiveness, and once the wall of the salt rock gas storage cavity is damaged, the gas can leak, and serious secondary disasters such as fire and explosion are caused.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that the layered salt rock reservoir suffers from strong earthquake action during construction and operation, the gas stored in salt caverns has the characteristics of high pressure, combustibility and explosiveness, once the salt rock reservoir cavity wall is damaged, the gas can leak, and serious secondary disasters such as fire and explosion are caused, the experimental device for simulating the vibration deformation of the salt rock reservoir with the interlayer cavity wall under the fault action is provided.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a salt rock gas storage area intermediate layer chamber wall vibrations deformation simulation experiment device under fault action, includes the vibratory equipment who provides the vibration source, sets up box on vibratory equipment and the foil gage of being connected with external detection equipment, have the cavity that seals the setting in the box, be provided with fault chassis test block and the rock specimen that has the gas storage in the cavity, be provided with the gas injection pipe that communicates with the gas storage in the rock specimen on the box, the foil gage sets up on the rock specimen, have the clearance between rock specimen and fault chassis test block both and the cavity, works as when vibratory equipment provides the vibration source, displacement and mutual extrusion in the cavity between fault chassis test block and the rock specimen, simultaneously through deformation when the foil gage detects the rock specimen vibration.
According to the invention, gas is injected into the gas storage of the rock sample through the gas injection pipe, the box body is driven to vibrate by the vibration equipment, the rock sample and the fault lower disc test block are enabled to displace in the cavity and mutually extrude, the vibration condition of the salt rock gas storage with the fault cavity wall under the fault effect can be simulated, and an experimental basis is provided for the damage degree of the cavity wall by recording the strain gauge parameters.
In order to enable the rock sample and the fault lower disc test block to better displace and squeeze in the cavity under the vibration, a plurality of balls are further arranged on the inner peripheral wall of the cavity of the box body. Through set up the ball on the inner peripheral wall of cavity, be rolling friction between ball and rock specimen and the fault lower disc test block, just so better make rock specimen and fault lower disc test block displacement in the box.
Further, a fault upper disc top cover and a fault lower disc top cover are arranged in the cavity, the fault upper disc top cover is located above the rock sample, and the fault lower disc top cover is located above the fault lower disc test block.
For better make the extrusion between rock specimen and the fault lower disc test block, further, be provided with first spring between fault lower disc top cap and the fault lower disc test block, be provided with the second spring between fault lower disc test block and the cavity, first spring and second spring set up the both sides at the fault lower disc test block relatively. Through set up first spring and second spring relatively in the both sides of fault lower disc test block, make the fault lower disc test block in the bigger displacement space of box like this, just also better make the extrusion between rock specimen and the fault lower disc test block.
Further, a rubber gasket is arranged between the fault upper disc top cover and the rock sample.
Further, the gas injection pipe comprises an outer hard pipe and an inner hose, the outer hard pipe is arranged outside the box body, the inner hose is arranged in the cavity and between the upper disc top cover of the fault, one end of the outer hard pipe is communicated with the inner hose, and the other end of the inner hose is communicated with a gas storage of a rock sample. The combination of the outer hard tube and the inner hose ensures that the gas injection tube does not break during vibration.
Further, the rock sample comprises a quarter cavity wall rock, a three-quarter cavity wall rock and a perspective member disposed between the quarter cavity wall rock and the three-quarter cavity wall rock. The operation condition of the salt rock gas storage shouting interlayer cavity under the vibration and fault activity is simulated through the quarter cavity wall rock block, the three-quarter cavity wall rock block and the perspective piece.
For better detection of the salt rock gas reservoir shouting sandwich chamber, further the strain gauge is arranged between the quarter cavity wall rock mass and the perspective and between the three-quarter cavity wall rock mass and the perspective. The strain gauge will provide better experimental data for cavity wall failure experiments between one-quarter cavity wall rock mass and three-quarters cavity wall rock mass through parameters of strain force.
Further, a reinforcing column is arranged on the inner peripheral wall of the cavity. The reinforcing column is used for guaranteeing the stability and reliability of the box body structure.
Further, the gas injection pipe is provided with a pressure gauge, a flow meter and a valve.
The beneficial effects of the invention are as follows: when the experimental device for simulating vibration deformation of the interlayer cavity wall of the salt rock gas storage under the action of faults is used, gas is injected into the gas storage of a rock sample through the gas injection pipe, the vibration equipment drives the box body to vibrate, and the rock sample and the fault lower disc test block are enabled to displace in the cavity and mutually squeeze, so that the vibration condition of the cavity wall of the salt rock gas storage with the faults under the action of the faults can be simulated, experimental basis is provided for the damage degree of the cavity wall by recording the parameters of the strain gauge, the problem that the layered salt rock storage can suffer from strong earthquake action during construction and operation, the gas stored in the salt cavern has the characteristics of high pressure, flammability and explosion, and once the cavity wall of the salt rock gas storage is damaged, the gas can leak, and serious secondary disasters such as fire and explosion are caused.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of the structure of a rock sample of the present invention;
fig. 5 is a schematic view of the internal structure of the case in the present invention.
In the figure: 1. vibration equipment, 2, a box body, 201, a cavity, 3, a strain gauge, 4, a fault lower disc test block, 5, a rock sample, 501, a quarter cavity wall rock block, 502, a three-quarter cavity wall rock block, 503, a perspective piece, 6, a ball, 7, a fault upper disc top cover, 8, a fault lower disc top cover, 9, a first spring, 10, a second spring, 11, a rubber gasket, 12, an outer hard tube, 13, an inner hose, 14, a reinforcing column, 15, a pressure gauge, 16, a flowmeter, 17, a valve, 18 and an air injection tube.
Detailed Description
The invention is further described in detail below in connection with the examples:
the present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in various other embodiments according to the present invention, or simply change or modify the design structure and thought of the present invention, which fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1-5, a salt rock gas storage belt interlayer cavity wall vibration deformation simulation experiment device under fault action comprises a vibration device 1 for providing a vibration source, a box body 2 arranged on the vibration device 1 and a strain gauge 3 connected with an external detection device, wherein a cavity 201 which is arranged in a sealing manner is arranged in the box body 2, a fault lower disc test block 4 and a rock sample 5 with a gas storage are arranged in the cavity 201, a gas injection pipe 18 communicated with the gas storage in the rock sample 5 is arranged on the box body 2, the strain gauge 3 is arranged on the rock sample 5, a gap is reserved between the rock sample 5 and the fault lower disc test block 4 and the cavity 201, when the vibration device 1 provides the vibration source, the fault lower disc test block 4 and the rock sample 5 are displaced in the cavity 201 and mutually extruded, and meanwhile deformation of the rock sample 5 during vibration is detected through the strain gauge 3.
The inner peripheral wall of the inner cavity of the box body 2 is provided with a plurality of balls 6.
A fault upper disc top cover 7 and a fault lower disc top cover 8 are arranged in the cavity 201, the fault upper disc top cover 7 is located above the rock sample 5, and the fault lower disc top cover 8 is located above the fault lower disc test block 4.
A first spring 9 is arranged between the fault lower disc top cover 8 and the fault lower disc test block 4, a second spring 10 is arranged between the fault lower disc test block 4 and the cavity 201, and the first spring 9 and the second spring 10 are oppositely arranged on two sides of the fault lower disc test block 4.
A rubber gasket 11 is arranged between the fault upper disc top cover 7 and the rock sample 5.
The gas injection pipe 18 comprises an outer hard pipe 12 and an inner hose 13, the outer hard pipe 12 is arranged outside the box body 2, the inner hose 13 is arranged between the cavity 201 and the fault upper disc top cover 7, one end of the outer hard pipe 12 is communicated with the inner hose 13, and the other end of the inner hose 13 is communicated with a gas storage of the rock sample 5.
The rock sample 5 comprises a quarter cavity wall rock 501, a three quarter cavity wall rock 502 and a perspective 503, the perspective 503 being arranged between the quarter cavity wall rock 501 and the three quarter cavity wall rock 502.
The strain gauge 3 is arranged between the quarter cavity wall rock 501 and the perspective part 503 and between the three-quarter cavity wall rock 502 and the perspective part 503.
The inner peripheral wall of the cavity 201 is provided with a reinforcing column 14. Here, the reinforcing columns 14 are arranged in a plurality of spaced apart manner.
The gas injection pipe 18 is provided with a pressure gauge 15, a flow meter 16 and a valve 17.
When the experimental device for simulating vibration deformation of the interlayer cavity wall of the salt-rock gas storage under the fault action is used, nitrogen or air is injected into the gas storage of the rock sample 5 through the outer hard pipe 12 of the gas injection pipe 18, the nitrogen or air enters the gas storage of the rock sample 5 through the inner hose 13, the pressure and the capacity of gas in the gas storage are observed through the pressure gauge 15 and the flow gauge 16, the air tightness of the gas storage can be checked by closing the valve 17, the vibration equipment 1 is started and the box body 2 is driven to vibrate together, so that the rock sample 5 and the fault lower disc test block 4 displace in the cavity 201, the fault lower disc test block 4 extrudes the rock sample 5 under the action of the first spring 9 and the second spring 10, the quarter cavity wall rock block 501 and the three-quarter cavity wall rock block 502 of the rock sample 5 are of three-layer structure with an interlayer and reserve gas storage cavity space, and the three-quarter cavity wall rock block 501 is provided with a sandwich interlayer for simulating the salt cavity of the salt-rock, and the three-quarter cavity wall rock block 502 and the three-quarter cavity wall rock block 501 is provided with the sandwich interlayer gas storage for simulating vibration, the vibration equipment 1 and the box body 2 is driven to vibrate together, so that vibration and vibration deformation of the interlayer cavity of the salt-rock storage caused by the activity is observed and measured.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
1. The utility model provides a salt rock gas storage area intermediate layer chamber wall vibrations deformation simulation experiment device under fault action which characterized in that: the vibration device comprises vibration equipment (1) for providing a vibration source, a box body (2) arranged on the vibration equipment (1) and a strain gauge (3) connected with external detection equipment, wherein a cavity (201) is arranged in the box body (2) in a sealing manner, a fault lower disc test block (4) and a rock sample (5) with a gas storage are arranged in the cavity (201), a gas injection pipe (18) communicated with the gas storage in the rock sample (5) is arranged on the box body (2), the strain gauge (3) is arranged on the rock sample (5), a gap is reserved between the rock sample (5) and the fault lower disc test block (4) and the cavity (201), and when the vibration equipment (1) provides the vibration source, the fault lower disc test block (4) and the rock sample (5) are displaced in the cavity (201) and mutually extruded, and deformation of the rock sample (5) during vibration is detected through the strain gauge (3);
a fault upper disc top cover (7) and a fault lower disc top cover (8) are arranged in the cavity (201), the fault upper disc top cover (7) is positioned above the rock sample (5), and the fault lower disc top cover (8) is positioned above the fault lower disc test block (4);
a first spring (9) is arranged between the fault lower disc top cover (8) and the fault lower disc test block (4), a second spring (10) is arranged between the fault lower disc test block (4) and the cavity (201), and the first spring (9) and the second spring (10) are oppositely arranged on two sides of the fault lower disc test block (4).
2. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 1, wherein the experimental device is characterized in that: the box body (2) is provided with a plurality of balls (6) on the inner peripheral wall of the inner cavity.
3. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 1, wherein the experimental device is characterized in that: a rubber gasket (11) is arranged between the fault upper disc top cover (7) and the rock sample (5).
4. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 3, wherein the experimental device is characterized in that: the gas injection pipe (18) comprises an outer hard pipe (12) and an inner hose (13), the outer hard pipe (12) is arranged outside the box body (2), the inner hose (13) is arranged between the cavity (201) and the fault upper disc top cover (7), one end of the outer hard pipe (12) is communicated with the inner hose (13), and the other end of the inner hose (13) is communicated with a gas storage of the rock sample (5).
5. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 1, wherein the experimental device is characterized in that: the rock sample (5) comprises a quarter cavity wall rock (501), a three-quarter cavity wall rock (502) and a perspective (503), the perspective (503) being arranged between the quarter cavity wall rock (501) and the three-quarter cavity wall rock (502).
6. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 5, wherein the experimental device is characterized in that: the strain gauge (3) is arranged between the quarter cavity wall rock (501) and the perspective part (503) and between the three-quarter cavity wall rock (502) and the perspective part (503).
7. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 1, wherein the experimental device is characterized in that: a reinforcing column (14) is arranged on the inner peripheral wall of the cavity (201).
8. The experimental device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage under fault action as claimed in claim 1, wherein the experimental device is characterized in that: the air injection pipe (18) is provided with a pressure gauge (15), a flow meter (16) and a valve (17).
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| CN202110451302.0A CN113155388B (en) | 2021-04-26 | 2021-04-26 | Device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage reservoir under fault action |
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| CN202110451302.0A CN113155388B (en) | 2021-04-26 | 2021-04-26 | Device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage reservoir under fault action |
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