CN113533677A - One-dimensional test device for testing physical properties of hydrate - Google Patents
One-dimensional test device for testing physical properties of hydrate Download PDFInfo
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- CN113533677A CN113533677A CN202110880537.1A CN202110880537A CN113533677A CN 113533677 A CN113533677 A CN 113533677A CN 202110880537 A CN202110880537 A CN 202110880537A CN 113533677 A CN113533677 A CN 113533677A
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 230000000704 physical effect Effects 0.000 title claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000000007 visual effect Effects 0.000 claims abstract description 31
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 23
- 238000005065 mining Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims description 49
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- 238000003825 pressing Methods 0.000 claims description 36
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 24
- 238000000034 method Methods 0.000 description 19
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- 239000007789 gas Substances 0.000 description 15
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- 238000000354 decomposition reaction Methods 0.000 description 9
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- 230000000694 effects Effects 0.000 description 4
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- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 4
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- 238000011160 research Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
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Abstract
The invention discloses a hydrate physical property test one-dimensional test device, which comprises a low-temperature constant temperature box and a body arranged in the low-temperature constant temperature box, wherein the body comprises: the device comprises an axial loading module, a sample generating module, a simulated mining depressurization module, a sand production visual module and a base; a water saturated framework material is arranged in the sample generation module, and a plurality of sensor interfaces are arranged on the sample generation module; the axial loading module is used for applying axial pressure to the water-saturated framework material; the water saturated framework material can be discharged from the simulated exploitation depressurization module; the sand outlet visual module is used for observing the outflow of the water saturated framework material; the axial loading module and the simulated exploitation depressurization module are respectively arranged at two ends of the sample generation module; the axial loading module, the sample generation module and the simulated exploitation depressurization module are arranged in the sand production visual module, and the axial lines of the axial loading module, the sample generation module, the simulated exploitation depressurization module and the sand production visual module are positioned on the same straight line; the visual module of sand production sets up the top surface at the base.
Description
Technical Field
The invention relates to the technical field of research on physical properties of natural gas hydrates, in particular to a one-dimensional testing device for testing physical properties of hydrates.
Background
The natural gas hydrate is an ice-like cage-shaped crystalline compound formed by natural gas and water under low temperature and high pressure, is widely distributed in deep water strata such as high-latitude polar frozen soil strata and ocean lakes, has the characteristics of large reserves, high energy density and the like, and is considered as a potential energy source. Among them, the energy density of methane (volume of methane per unit volume of rock under standard conditions) is very large, 10 times that of coal and black shale, 2.5 times that of natural gas.
Natural gas hydrates are widely distributed in nature in continents, sloping terrain in islands, elevations at the edges of active and passive continents, polar continental shelves, and the deepwater environment of the ocean and some inland lakes. Formation conditions of natural gas hydrate: low temperature, generally below 10 ℃; high pressure, generally higher than 10 MPa; a sufficient source of natural gas (hydrocarbons, predominantly methane) gas; favorable hydrate formation space.
The hydrate reservoir rock skeleton usually belongs to unconsolidated, weakly consolidated or fractured development strata, the mining of the hydrate causes the change of the cementing strength, porosity, effective stress and permeability coefficient of the strata, meanwhile, because the hydrate is distributed in the seabed strata in a layering way, the permeability between the hydrate layer and the cover layer is different in the mining process, the hydrate is decomposed to change the original seepage balance, the phenomenon of water and sand production between layers is easy to occur, the stability of the well wall is reduced to cause well collapse, and the effective development and utilization of hydrate resources are seriously influenced. Therefore, formation sand production and sand control are one of the key problems faced in the hydrate decomposition process.
The hydrate in the south China sea area is filled in the pores of the muddy sediments in a dispersion mode or a weak cementation mode, so that serious sand production problems can be faced in the hydrate decomposition process, the blockage of a production well is caused, the production efficiency of the deep sea natural gas hydrate is seriously restricted, the production cost is increased, and the commercialization process is influenced. How to solve the problems of sand production and treatment of a well casing in the hydrate exploitation process needs to fully consider special conditions of deep sea natural gas hydrate occurrence, reveal the sand production mechanism in the hydrate reservoir exploitation process, analyze deep reasons influencing the sand production of a hydrate stratum, discuss the inspiration of the conventional sand production prediction technology and sand control technology of the oil and gas well on the treatment of the hydrate well at present, and provide reference for subsequent research and engineering application. The method has practical significance for economically and efficiently developing deep sea hydrate resources in China by researching the problems of sand production and prevention in the hydrate exploitation process.
Disclosure of Invention
The invention aims to provide a one-dimensional testing device for testing physical properties of a hydrate, which is used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a hydrate physical property test one-dimensional test device, which comprises a low-temperature constant temperature box and a body arranged in the low-temperature constant temperature box, wherein the body comprises: the device comprises a sample body, a sand outlet visual module and a base;
the sample body comprises an axial loading module, a sample generating module and a simulated mining depressurization module;
a water saturated framework material is arranged in the sample generation module, and a plurality of sensor interfaces are arranged on the sample generation module; the axial loading module is used for applying axial pressure to the water-saturated framework material; the water saturated framework material can be discharged from the simulated exploitation depressurization module; the sand production visual module is used for observing the outflow of the water saturated framework material; the axial loading module and the simulated exploitation depressurization module are respectively arranged at two ends of the sample generation module; the axial loading module, the sample generation module and the simulated exploitation depressurization module are arranged in the sand production visual module, and the axial lines of the axial loading module, the sample generation module, the simulated exploitation depressurization module and the sand production visual module are positioned on the same straight line; the sand outlet visual module is arranged on the top surface of the base.
Preferably, the sample generation module comprises a cylinder and a pressing cap;
the pressure cap is detachably connected with the outer wall of one end of the cylinder body, the pressure cap is connected with the simulated mining depressurization module, and the other end of the cylinder body is connected with the axial loading module; and the sensor interfaces are arranged on the outer wall of the barrel at equal intervals.
Preferably, the axial loading module comprises an axial compression piston, an axial compression cap, a pressure head, an axial compression cylinder, a sealing sleeve and a sand baffle plate;
the inner wall of one end of the axial compression cylinder is detachably connected with the outer wall of the other end of the cylinder body, the other end of the axial compression cylinder is detachably connected with the axial compression cap, the pressure head is arranged in the axial compression cylinder, the outer wall of the seal sleeve is respectively abutted against the inner wall of the cylinder body and the inner wall of the axial compression cylinder, one end of the pressure head is positioned in the cylinder body and abutted against the inner wall of the cylinder body, the other end of the pressure head is provided with an insertion hole, one end of the axial compression piston penetrates through the end face of the axial compression cap and is abutted against the inner wall of the insertion hole, the seal sleeve is sleeved on the outer wall of the pressure head, and the axial compression piston and the pressure head are provided with communicated first through holes; and the sand baffle is fixedly connected with the side surface of the pressure head.
Preferably, a first O-ring is arranged between the axial compression piston and the axial compression cap, a second O-ring is arranged between the axial compression piston and the inner wall of the axial compression cylinder, a third O-ring is arranged between the axial compression cap and the axial compression cylinder, a fourth O-ring is arranged between the pressure head and the seal sleeve, a fifth O-ring is arranged between the seal sleeve and the inner wall of the axial compression cylinder, and a sixth O-ring is arranged between the seal sleeve and the inner wall of the cylinder body;
preferably, the simulated mining depressurization module comprises a plug, an adjusting sheet and a reducing pressure cap;
the one end setting of end cap is in the barrel, just the end cap with set up porose circlip for between the barrel inner wall, the other end of end cap runs through press cap and cover to be equipped with the reducing pressure cap, the adjustment sheet sets up the reducing pressure cap with between the end cap, adjustment sheet and reducing pressure cap all set up the second through-hole of mutual intercommunication, the end cap with the reducing is pressed and is provided with seventh O type circle between the cap, the end cap is close to press cap terminal surface department outer wall cover to be equipped with axle circlip.
Preferably, the sanding visible module comprises a window pressing cap, an annular gasket, a sealing gasket, window glass, a main body, an eighth O-shaped ring, a ninth O-shaped ring and a joint;
the main body is arranged into a tubular structure, the outer wall of the bottom of the main body is fixedly connected with the top surface of the base, the window pressing caps are provided with two window pressing caps which are detachably connected with the inner walls of the two ends of the main body respectively, the two ends of the inner wall of the main body are provided with annular clamping grooves respectively, the inner wall of each annular clamping groove is fixedly connected with an annular gasket, the window glass is arranged into a cylindrical structure, the peripheral surface of the window glass is abutted against the inner wall of the annular gasket, the eighth O-shaped ring is arranged between the window glass and the annular gasket, the annular gasket is abutted against one side of the window glass, the sealing gasket is arranged between the other side of the window glass and the window pressing cap, the two joints are arranged and are symmetrically arranged on the peripheral wall of the main body about the axis, the joints are of the tubular structure and are communicated with the inner cavity of the main body, the two connectors are respectively connected with the axial loading module and the simulated exploitation depressurization module, and the ninth O-shaped ring is arranged between the connectors and the inner wall of the main body.
Preferably, the two joints are respectively tightly connected with the axial compression piston and the reducing compression cap.
Preferably, the joint connected with the reducing pressure cap is communicated with a meter, and the joint connected with the axial pressure piston is connected with a pressurizing system.
Preferably, the low-temperature incubator is externally connected with a water supply system, an air supply system and a data acquisition system.
Preferably, the sensor interface is respectively inserted with a temperature sensor, a pressure sensor and a resistance heater.
The invention discloses the following technical effects: the sample generation module that sets up can be used to the storage and compress tightly of water saturation framework material, and the state when making the material more be close actual exploitation, and the axial loading module that sets up can exert the axial pressure of settlement to the water content sample that generates after low temperature thermostated container applys moisture and natural gas, impels water saturation framework material to flow from the simulation exploitation depressurization module that sets up under the wrapping up under the effect of holding under the arms of axial pressure and hydrate decomposition process gas and water, and the visual module of rethread sand goes out observes and measures. The method can simulate the reservoir sand production process in the hydrate decomposition process under the action of axial pressure and the reservoir sand production process in the hydrate decomposition process under different screen mesh apertures, and can effectively disclose the mechanism of the hydrate reservoir sand production. The sand discharge device has the advantages of simple structure, convenience in disassembly, low cost and visual sand discharge process, and has wide popularization and application values in the technical field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the structure of a sample body according to the present invention;
FIG. 2 is an enlarged view of part A1;
FIG. 3 is a front view of a sand production visual module of the present invention;
FIG. 4 is a left side view of the sand production visual module of the present invention;
FIG. 5 is a top view of a sand production visual module of the present invention;
FIG. 6 is a schematic structural diagram of an embodiment of the present invention;
wherein, 1, a base; 2. a water-saturated framework material; 3. a sensor interface; 4. a barrel; 5. pressing the cap; 6. a piston is axially pressed; 7. pressing the cap by the shaft; 8. a pressure head; 9. a shaft pressing cylinder; 10. sealing sleeves; 11. a sand baffle plate; 12. a first through hole; 13. a first O-ring; 14. a second O-ring; 15. a third O-ring; 16. a fourth O-ring; 17. a fifth O-ring; 18. a sixth O-ring; 19. a plug; 20. a regulating sheet; 21. reducing pressing caps; 22. a circlip for a hole; 23. a second through hole; 24. a seventh O-ring; 25. a circlip for the shaft; 26. a window pressing cap; 27. an annular gasket; 28. an annular gasket; 29. sealing gaskets; 30. a window glass; 31. a main body; 32. an eighth O-ring; 33. a ninth O-ring; 34. a joint; 35. a glass cylinder; 36. a left end cap; 37. a right end cap; 38. a locking lever.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a hydrate physical property test one-dimensional test device, which comprises a low-temperature constant temperature box and a body arranged in the low-temperature constant temperature box, wherein the body comprises: the device comprises a sample body, a sand outlet visual module and a base 1;
the sample body comprises an axial loading module, a sample generating module and a simulated mining depressurization module;
a water saturated framework material 2 is arranged in the sample generation module, and a plurality of sensor interfaces 3 are arranged on the sample generation module; the axial loading module is used for applying axial pressure to the water-saturated framework material 2; the water saturated framework material 2 can be discharged from the simulated exploitation depressurization module; the sand outlet visual module is used for observing the outflow of the water saturated framework material 2; the axial loading module and the simulated exploitation depressurization module are respectively arranged at two ends of the sample generation module; the axial loading module, the sample generation module and the simulated exploitation depressurization module are arranged in the sand production visual module, and the axial lines of the axial loading module, the sample generation module, the simulated exploitation depressurization module and the sand production visual module are positioned on the same straight line; the visual module of sand production sets up the top surface at base 1.
The water saturated framework material refers to loose particles of fine sand, kaolin and the like which are fully saturated by distilled water.
The sample generation module that sets up can be used to the storage and compress tightly of water saturation framework material 2, and the state when making the material more be close actual exploitation, and the axial loading module that sets up can exert the axial pressure of settlement to the hydrate sample that generates after low temperature thermostated container applys moisture and natural gas, impels water saturation framework material to flow from the simulation exploitation depressurization module that sets up under the wrapping up under the effect of holding under the arms of axial pressure and hydrate decomposition process gas water, and the visual module of rethread sand goes out observes and measures. The method can simulate the reservoir sand production process in the hydrate decomposition process under the action of axial pressure and the reservoir sand production process in the hydrate decomposition process under different screen mesh apertures, and can effectively disclose the mechanism of the hydrate reservoir sand production.
The maximum pressure bearing is 25MPa, and the applicable temperature range is-15 ℃ to 200 ℃.
According to the further optimized scheme, the sample generation module comprises a cylinder 4 and a pressing cap 5;
the pressing cap 5 is detachably connected with the outer wall of one end of the cylinder 4, the pressing cap 5 is connected with the simulated mining depressurization module, and the other end of the cylinder 4 is connected with the axial loading module;
the preferred inner diameter of the cylinder 4 is 100mm, and the length is 500 mm;
the arranged cylinder body 4 is used for storing water saturation framework materials, and the arranged pressing cap 5 can be used for connecting a simulated exploitation pressure reduction module.
In a further optimized scheme, the axial loading module comprises an axial compression piston 6, an axial compression cap 7, a pressure head 8, an axial compression cylinder 9, a sealing sleeve 10 and a sand baffle plate 11;
the inner wall of one end of the axial compression cylinder 9 is detachably connected with the outer wall of the other end of the cylinder body 4, the other end of the axial compression cylinder 9 is detachably connected with the axial compression cap 7, the pressure head 8 is arranged in the axial compression cylinder 9, the outer wall of the sealing sleeve 10 is respectively abutted against the inner wall of the cylinder body 4 and the inner wall of the axial compression cylinder 9, one end of the pressure head 8 is positioned in the cylinder body 4 and is abutted against the inner wall of the cylinder body 4, the other end of the pressure head 8 is provided with an inserting hole, one end of the axial compression piston 6 penetrates through the end face of the axial compression cap 7 and is abutted against the inner wall of the inserting hole, the sealing sleeve 10 is sleeved on the outer wall of the pressure head 8, and the axial compression piston 6 and the pressure head 8 are provided with a first through hole 12 which is communicated; the sand baffle plate 11 is fixedly connected with the side surface of the pressure head 8.
The axial loading module can apply 40MPa axial pressure at most.
The sand baffle 11 that sets up can prevent that water saturation framework material 2 from leaking from axial loading module side, and setting up of seal cover 10 can be when guaranteeing that pressure head 8 from exerting axial pressure to water saturation framework material 2, prevents that water saturation framework material 2 from leaking.
The sand baffle 11 is made of high-density fine-pore materials.
According to a further optimized scheme, a first O-shaped ring 13 is arranged between the axial compression piston 6 and the axial compression cap 7, a second O-shaped ring 14 is arranged between the axial compression piston 6 and the inner wall of the axial compression cylinder 9, a third O-shaped ring 15 is arranged between the axial compression cap 7 and the axial compression cylinder 9, a fourth O-shaped ring 16 is arranged between the pressure head 8 and the sealing sleeve 10, a fifth O-shaped ring 17 is arranged between the sealing sleeve 10 and the inner wall of the axial compression cylinder 9, and a sixth O-shaped ring 18 is arranged between the sealing sleeve 10 and the inner wall of the cylinder body 4;
the O-shaped ring is made of acid gas corrosion resistant materials such as fluorine glue materials.
The O-shaped ring can play a role in auxiliary sealing, and the sealing performance is improved.
The scheme is further optimized, and the simulated mining depressurization module comprises a plug 19, an adjusting sheet 20 and a reducing pressure cap 21;
one end of a plug 19 is arranged in a barrel 4, a hole elastic check ring 22 is arranged between the plug 19 and the inner wall of the barrel 4, the other end of the plug 19 penetrates through a pressing cap 5 and is sleeved with a reducing pressing cap 21, an adjusting sheet 20 is arranged between the reducing pressing cap 21 and the plug 19, second through holes 23 which are communicated with each other are formed in the plug 19, the adjusting sheet 20 and the reducing pressing cap 21, a seventh O-shaped ring 24 is arranged between the plug 19 and the reducing pressing cap 21, and an outer wall of the plug 19 close to the end face of the pressing cap 5 is sleeved with a shaft elastic check ring 25.
The simulation exploitation depressurization module can change the reducing pressure cap according to different simulated sand outlet sizes, control the sand outlet amount and improve the measurement precision of the device.
In a further optimized scheme, the sand production visual module comprises a window pressing cap 26, an annular gasket 27, an annular gasket 28, a sealing gasket 29, window glass 30, a main body 31, an eighth O-shaped ring 32, a ninth O-shaped ring 33 and a joint 34;
the main body 31 is arranged into a tubular structure, the outer wall of the bottom of the main body 31 is fixedly connected with the top surface of the base 1, two window pressing caps 26 are arranged and are respectively detachably connected with the inner walls of two ends of the main body 31, two ends of the inner wall of the main body 31 are respectively provided with an annular clamping groove, the inner wall of the annular clamping groove is fixedly connected with an annular gasket 27, the window glass 30 is arranged into a cylindrical structure, the peripheral surface of the window glass 30 is abutted against the inner wall of the annular gasket 27, an eighth O-shaped ring 32 is arranged between the window glass 30 and the annular gasket 27, the annular gasket 28 is abutted against one side of the window glass 30, a sealing gasket 29 is arranged between the other side of the window glass 30 and the window pressing cap 26, two joints 34 are arranged and are symmetrically arranged on the peripheral wall of the main body 31 relative to the axis of the main body 31, the joints 34 are in a tubular structure, the joints 34 are communicated with the inner cavity of the main body 31, and are respectively connected with an axial loading module and a simulated mining depressurization module, a ninth O-ring 33 is provided between the joint 34 and the inner wall of the body 31.
During observation and measurement, the sand production process and the sand production mechanism in the hydrate exploitation process can be observed through the window glass 30 from the window pressure caps 26 arranged on the two sides, and corresponding theoretical support can be provided for the deep sea hydrate exploitation sand production control by combining the measured data.
In a further optimized scheme, the two joints 34 are respectively connected with the axial pressure piston 6 and the reducing pressure cap 21 in a tight fit manner.
In a further optimized scheme, a joint 34 connected with the reducing pressure cap 21 is communicated with a meter, and the joint 34 connected with the axial pressure piston 6 is connected with a pressurizing system.
The meter can measure and record the relevant data such as sand production speed, sand production quality and the like, and more accurate measurement data can be obtained. The meter provided is provided as a flow meter in the present invention.
According to the further optimization scheme, a water supply system, an air supply system and a data acquisition system are externally connected with the low-temperature thermostat;
the water supply system, the gas supply system and the data acquisition system are all prior art, and the water supply system is used for providing moisture in the low temperature thermostat, and the gas supply system that sets up is the same as to extract gas and provide the natural gas to the low temperature thermostat, and the data acquisition system is the same as control water yield and gas content.
The water supply system consists of a water pump, a pressure sensor, a water tank, a shut-off valve and a flowmeter; the arranged gas supply system consists of a gas pump, a shut-off valve, a natural gas tank and a flowmeter; the data acquisition system consists of a data sending part, a data acquisition part and a connection management part.
In a further optimized scheme, the sensor interface 3 is respectively inserted with a temperature sensor, a pressure sensor and a resistance heater.
Firstly, filling a water-saturated framework material 2 with a set grading grain size into a cylinder 4 and compacting the material, installing a temperature sensor, a pressure sensor or a resistance heater through a sensor interface 3, inserting the filled water-saturated framework material 2, sequentially connecting an axial loading module, a sample generation module, a simulated mining depressurization module and a sand production visual module, and adjusting a reducing pressure cap 21 to enable an adjusting sheet 20 to reach the diameter size required by test design; inserting the connected style body into the main body 31, connecting the two connectors 34 with the main body 31 through threads respectively, clamping the two connectors 34 with the axial loading module and the simulated mining depressurization module respectively, then putting the combined one-dimensional hydrate physical property test device into a low-temperature incubator integrally, connecting peripheral systems such as a data acquisition system, an air and water supply system, an exhaust fan and the like, closing the oven door, setting the internal temperature of the incubator according to a hydrate phase equilibrium curve, exhausting air in the system, filling the system with test gas such as natural gas and the like, and maintaining the set pressure to enable the water saturated framework material 2 to generate hydrate in gaps; after the hydrate is fully generated in the gap of the water-saturated framework material 2, applying a set axial pressure to the generated hydrate-containing sample through an axial pressure piston 6; the gas pressure at the sample sand production visual module side is reduced through the exhaust system, the hydrate phase equilibrium condition is broken through due to the reduction of the gas pressure, so that the hydrate is decomposed, the water saturated framework material 2 flows to the sand production visual module from the adjusting sheet 20 and the reducing pressure cap 21 under the axial pressure and the wrapping effect of the hydrate decomposition process and the gas and water, and then the related data such as sand production speed, sand production quality and the like are measured and recorded through the meter.
In one embodiment of the present invention, in order to realize the visual observation of the hydrate, a second sample generation module is provided, and the second sample generation module includes a glass cylinder 35, a left end cover 36, a right end cover 37, and a locking rod 38;
the one end setting of left end cover 36 is in the one end of glass barrel 35 inner chamber, and with glass barrel 35 inner wall butt, the one end setting of right-hand member lid 37 is at the other end of glass barrel 35 inner chamber, and with glass barrel 35 inner wall butt, check lock lever 38 is provided with a plurality of, a plurality of check lock lever 38 is around the setting of glass barrel 35 central line circumference array, and 36 and the right-hand member lid 37 of left end cover are run through respectively to the both ends of check lock lever 38, there is the nut at the both ends of check lock lever 38 through threaded connection respectively, the regulation hole has all been seted up at 36 and the 37 centers of right-hand member lid, be provided with water saturation framework material 2 in the glass barrel 35, left end cover 36 and right-hand member lid 37 and glass barrel 35 inner wall butt department are provided with the sealing washer.
The right end cap 37 of the second sample generation module is connected to the simulated mining depressurization module to form a second sample body, which can be replaced.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The utility model provides a hydrate rerum natura test one-dimensional test device, includes the cryostat tank and sets up body in the cryostat tank, its characterized in that, the body includes: the device comprises a sample body, a sand outlet visual module and a base (1);
the sample body comprises an axial loading module, a sample generating module and a simulated mining depressurization module;
a water saturation framework material (2) is arranged in the sample generation module, and a plurality of sensor interfaces (3) are arranged on the sample generation module; the axial loading module is used for applying axial pressure to the water-saturated framework material (2); the water-saturated framework material (2) can be discharged from the simulated exploitation depressurization module; the sand production visual module is used for observing the outflow of the water saturated framework material (2); the axial loading module and the simulated exploitation depressurization module are respectively arranged at two ends of the sample generation module; the axial loading module, the sample generation module and the simulated exploitation depressurization module are arranged in the sand production visual module, and the axial lines of the axial loading module, the sample generation module, the simulated exploitation depressurization module and the sand production visual module are positioned on the same straight line; the sand outlet visual module is arranged on the top surface of the base (1).
2. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 1, wherein: the sample generation module comprises a cylinder (4) and a pressing cap (5);
the pressure cap (5) is detachably connected with the outer wall of one end of the cylinder body (4), the pressure cap (5) is connected with the simulated mining depressurization module, and the other end of the cylinder body (4) is connected with the axial loading module; the sensor interfaces (3) are arranged on the outer wall of the barrel body (4) at equal intervals.
3. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 2, wherein: the axial loading module comprises an axial compression piston (6), an axial compression cap (7), a pressure head (8), an axial compression cylinder (9), a sealing sleeve (10) and a sand baffle plate (11);
the inner wall of one end of the axial compression cylinder (9) is detachably connected with the outer wall of the other end of the cylinder body (4), the other end of the axial compression cylinder (9) is detachably connected with the axial compression cap (7), the pressure head (8) is arranged in the axial compression cylinder (9), the outer wall of the seal sleeve (10) is respectively abutted against the inner wall of the cylinder body (4) and the inner wall of the axial compression cylinder (9), one end of the pressure head (8) is positioned in the cylinder body (4) and abutted against the inner wall of the cylinder body (4), the other end of the pressure head (8) is provided with an insertion hole, one end of the axial compression piston (6) penetrates through the end face of the axial compression cap (7) and is abutted against the inner wall of the insertion hole, the seal sleeve (10) is sleeved on the outer wall of the pressure head (8), and the first through hole (12) communicated with the axial compression piston (6) and the pressure head (8) is formed; and the sand baffle plate (11) is fixedly connected with the side surface of the pressure head (8).
4. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 3, wherein: the shaft pressing device is characterized in that a first O-shaped ring (13) is arranged between the shaft pressing piston (6) and the shaft pressing cap (7), a second O-shaped ring (14) is arranged between the shaft pressing piston (6) and the inner wall of the shaft pressing cylinder (9), a third O-shaped ring (15) is arranged between the shaft pressing cap (7) and the shaft pressing cylinder (9), a fourth O-shaped ring (16) is arranged between the pressing head (8) and the sealing sleeve (10), a fifth O-shaped ring (17) is arranged between the sealing sleeve (10) and the inner wall of the shaft pressing cylinder (9), and a sixth O-shaped ring (18) is arranged between the sealing sleeve (10) and the inner wall of the cylinder body (4).
5. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 3, wherein: the simulated mining depressurization module comprises a plug (19), an adjusting sheet (20) and a reducing pressure cap (21);
the one end setting of end cap (19) is in barrel (4), just end cap (19) with set up porose circlip (22) of using between barrel (4) the inner wall, the other end of end cap (19) runs through press cap (5) and cover to be equipped with cap (21) is pressed in the reducing, adjustment sheet (20) set up cap (21) is pressed in the reducing with between end cap (19), second through-hole (23) that mutual intercommunication was all seted up in end cap (19), adjustment sheet (20) and reducing press cap (21), end cap (19) with be provided with seventh O type circle (24) between cap (21) is pressed in the reducing, end cap (19) are close to it is equipped with axle circlip (25) to press cap (5) terminal surface department outer wall cover.
6. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 5, wherein: the sanding visible module comprises a window pressing cap (26), an annular gasket (27), an annular gasket (28), a sealing gasket (29), window glass (30), a main body (31), an eighth O-shaped ring (32), a ninth O-shaped ring (33) and a joint (34);
the main body (31) is arranged to be of a cylindrical structure, the outer wall of the bottom of the main body (31) is fixedly connected with the top surface of the base (1), the window pressing caps (26) are arranged in two numbers and detachably connected with the inner walls of the two ends of the main body (31) respectively, annular clamping grooves are formed in the two ends of the inner wall of the main body (31) respectively, annular gaskets (27) are fixedly connected with the inner walls of the annular clamping grooves, the window glass (30) is arranged to be of a cylindrical structure, the peripheral surface of the window glass (30) is abutted against the inner walls of the annular gaskets (27), eighth O-shaped rings (32) are arranged between the window glass (30) and the annular gaskets (27), the annular gaskets (28) are abutted against one side of the window glass (30), and sealing gaskets (29) are arranged between the other side of the window glass (30) and the window pressing caps (26), the two joints (34) are symmetrically arranged on the peripheral wall of the main body (31) relative to the axis of the main body (31), the joints (34) are of a cylindrical structure, the joints (34) are communicated with the inner cavity of the main body (31), the two joints are respectively connected with the axial loading module and the simulated mining depressurization module, and the ninth O-shaped ring (33) is arranged between the joints (34) and the inner wall of the main body (31).
7. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 6, wherein: the two joints (34) are respectively connected with the axial pressure piston (6) and the reducing pressure cap (21) in a tight fit manner.
8. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 7, wherein: the joint (34) connected with the reducing pressure cap (21) is communicated with a meter, and the joint (34) connected with the axial pressure piston (6) is connected with a pressurizing system.
9. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 1, wherein: the low-temperature incubator is externally connected with a water supply system, an air supply system and a data acquisition system.
10. The one-dimensional testing device for testing the physical properties of the hydrate according to claim 1, wherein: the sensor interface (3) is respectively inserted with a temperature sensor, a pressure sensor and a resistance heater.
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