CN109060609A - A kind of natural gas hydrate permeability measurement device - Google Patents
A kind of natural gas hydrate permeability measurement device Download PDFInfo
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- CN109060609A CN109060609A CN201810949147.3A CN201810949147A CN109060609A CN 109060609 A CN109060609 A CN 109060609A CN 201810949147 A CN201810949147 A CN 201810949147A CN 109060609 A CN109060609 A CN 109060609A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention provides a kind of natural gas hydrate permeability measurement device, including permeating room, temperature control system and air compressor, permeating room includes mistress and interior room, it is interior indoor equipped with rubber pattern, two permeable stones are setting up and down and are stuck in rubber pattern, gas hydrates style is wrapped up and be stuck between two permeable stones by rubber pattern, there is the first space between the side wall of interior room and the side wall of mistress, temperature control system is connected to the first space, there is second space between the side wall of rubber pattern and the side wall of interior room, air compressor is connected to the second space by confining pressure air inlet pipe, air compressor connects underlying permeable stone by osmosis system, one discharge pipe one end connects the permeable stone being located above, the other end stretches out infiltration room and is separately connected vacuum pump, gas concentration unit and liquid flow measurement device, the connection of one methane gas cylinder is seeped Permeable system is equipped with gas flowmeter, disengaging pressure difference of the differential pressure measurement system to measure infiltration room in osmosis system.
Description
Technical field
The present invention relates to gas hydrates development technique fields more particularly to a kind of natural gas hydrate permeability to measure
Device.
Background technique
Gas hydrates are widely present in seabed continental shelf and plateau permafrost, by sufficient gas source (predominantly methane) with
Water forms cage type crystalline compounds under high pressure low temperature environment, is broadly divided into two class of I type and II type.Due to 1 volume gas water
164 volume natural gases can be discharged by closing object, so gas hydrates are considered as the clean type of new century most development prospect
New energy, reserves are extremely abundant.How safe working gas hydrates cause the great attention of scientists from all over the world and government, at
In order to solve the new hot spot of energy crisis.
But to be commercialized exploitation of gas hydrate, still remain many technical difficult points and environmental hazard problem.
Since recovery process is more complicated, including the processes such as heat and mass, decomposition phase transformation, multidirectional seepage flow, stratum deformation, cause stratum to seep
Saturating rate changes, and permeability reduction can seriously affect penetrating power of the gas in matrix, reduce production efficiency, cause out
Adopt increased costs.In addition to this, if exploitation is revealed, upper overburden layer can not only be impacted, submarine landslide occurs
Equal geological disasters, and can marine ecosystems be caused with the loss that can not be retrieved.As it can be seen that gas hydrates reservoir and covering
The permeability of layer is the key parameter in combustible ice commercialization recovery process.
In view of original state rock sample is difficult to obtain, higher cost generally carries out basis using the artificial synthesized deposit in laboratory
Physical measurement.And hydrate sediment environmental effect condition is high pressure low temperature, common permeable rate measuring device not can guarantee hydration
The generation of sediment be stabilized, it is therefore desirable to special device simulates corresponding environment.
Summary of the invention
In view of this, can guarantee the embodiment provides a kind of natural gas hydrate permeability measurement device
Gas hydrates style is stabilized in experimentation, guarantees the steady seepage of gas phase or liquid phase in experimentation, and can
Regulation influences the parameter of permeability, while dismantling simply, and operation is easy.
The embodiment of the present invention provides a kind of natural gas hydrate permeability measurement device, including infiltration room, measurement and control of temperature
System and air compressor, the infiltration room includes mistress and is contained in the outer indoor interior room, described interior indoor equipped with upper
The rubber pattern of under shed, two permeable stones are setting up and down and are stuck in the rubber pattern, and gas hydrates style is by the rubber
Mould is wrapped up and is stuck between two permeable stone, has the first space between the side wall of the interior room and the side wall of the mistress,
The temperature control system is connected to inject coolant, the side wall of the rubber pattern to first space with first space
There is second space between the side wall of the interior room, the air compressor is connected to the second space by confining pressure air inlet pipe
Certain confining pressure is formed to inject gas into the second space, the air compressor is located below by osmosis system connection
The permeable stone, a discharge pipe one end connects the permeable stone that is located above, and the other end stretches out the infiltration room and simultaneously leads to
It crosses triple valve and is separately connected vacuum pump, gas concentration unit and liquid flow measurement device, a methane gas cylinder connects the infiltration
System, be equipped in the osmosis system gas flowmeter of measurement gas flow, a differential pressure measurement system and the discharge pipe and
The associated disengaging pressure difference to measure the infiltration room of the osmosis system.
Further, the osmosis system includes air accumulator, the air inlet pipe connecting with the upper end of the air accumulator and outlet
Pipe, the outlet pipe that connect with the lower end of the air accumulator and pipe is penetrated into, described one end for penetrating into pipe while connected
The escape pipe and the outlet pipe, the other end connect the underlying permeable stone, the air compressor connection first
Piping, one end of one second piping connect the air inlet pipe, and the other end connects the confining pressure air inlet pipe and first pipe simultaneously
System, the methane gas cylinder connect the air inlet pipe, are equipped on the air inlet pipe, the confining pressure air inlet pipe and second piping
Valve, the escape pipe are equipped with the gas flowmeter and intake valve, and the outlet pipe is equipped with inlet valve, and the pressure difference is surveyed
Amount system and the discharge pipe and described to penetrate into pipe associated.
Further, the pressure sensing for penetrating into the admission pressure that pipe is equipped with for measuring the infiltration room
Device, the discharge pipe are equipped with the pressure sensor of air outlet valve and the outlet pressure for measuring the infiltration room, the pressure difference
Measuring system includes penetrating into pipe and two pressure sensors or the pressure on the discharge pipe positioned at described
Difference measurements system includes the differential pressure indicator that pipe and the discharge pipe are penetrated into described in connection, or simultaneously includes being located at the infiltration
Pipe and the discharge pipe are penetrated into described in two pressure sensors into pipe and on the discharge pipe and connection
Differential pressure indicator.
Further, the air inlet pipe is equipped with the pressure sensor for measuring the air pressure in the air accumulator, described
Confining pressure air inlet pipe is equipped with the pressure sensor for measuring the confining pressure in the second space；The confining pressure air inlet pipe it is described
Pressure sensor is also equipped with a valve, the gas between the corresponding valve and the infiltration room on the escape pipe
Flowmeter body is located between the valve and the intake valve, and the valve is closer to the air accumulator.
Further, the 4th piping is connected on first piping, the 4th piping is connect with nitrogen cylinder, and described
Four pipings are equipped with valve；The air compressor is connect by a gas pressure reducer with first piping, the methane gas
Bottle is connect by another gas pressure reducer with the air inlet pipe.
Further, the temperature control system includes liquid nitrogen container and circulating pump, and the liquid nitrogen container is connected by third piping
The circulating pump is connect, the circulating pump is connected with an inlet tube and a return pipe, and the inlet tube and the return pipe protrude into institute
The opposite both sides in the first space and the interior room that is placed in are stated, liquid nitrogen is under the action of the circulating pump, in the inlet tube, institute
It states and is recycled between the first space, the return pipe and the circulating pump, the temperature control system further includes temperature sensor, institute
Temperature sensor is stated to connect on the inner wall of the mistress and with computer system.
Further, the third piping is equipped with valve.
Further, the permeability that gas hydrates style gas-phase permeation is calculated using formula (1), utilizes formula
(2) permeability of gas hydrates style liquid infiltration is calculated:
In formula: K is gas phase or liquid natural gas hydrate sediment permeability；μ is gas or coefficient of viscosity；L is
The height of gas hydrates style；QBFor gas flow；Q is fluid flow；PA、PBThe respectively described differential pressure measurement system is surveyed
The infiltration room measured into and out of pressure；A is the sectional area of gas hydrates style.
Further, sealing ring is equipped between the permeable stone and the rubber pattern inner wall.
Further, the confining pressure in the second space is 0~30MPa, and the coolant makes the indoor temperature of infiltration
Degree is -20~4 DEG C.
The technical solution that the embodiment of the present invention provides has the benefit that
(1) confining pressure in the second space is 0~30MPa, and the coolant makes the indoor temperature -20 of infiltration
It is~4 DEG C, consistent with the environmental effect condition of gas hydrates under natural conditions, it can guarantee gas water in experimentation
Being stabilized for object style is closed, guarantees the steady seepage of gas phase or liquid phase in experimentation, meets laboratory test Research Requirements.
(2) the permeation room uses double-chamber structure: the interior room and the mistress, first space in the mistress
It is connect with the temperature control system and is used for temperature control, the second space in the interior room is connect with the air compressor for controlling
Pressure, not only convenient disassembly, also capable of washing after end test, while permeation room cost is relatively cheap.
(3) the permeation chamber size is smaller, easy to carry, can be assembled, be measured with similar gas hydrates system
The basic hydrophysical property of gas hydrates carries out basis for further model experiment later.
(4) temperature control system can quickly, be accurately controlled temperature；The osmosis system quickly, can be controlled accurately
Admission pressure and pressure difference processed；The air compressor can quickly, be accurately controlled confining pressure；Pass through the above element and system regulation
Corresponding parameter studies its affecting laws and susceptibility to natural gas hydrate deposit permeability, to be hydrated for natural gas
Object safe working provides solid foundation.
Detailed description of the invention
Fig. 1 is the overall schematic of natural gas hydrate permeability measurement device of the present invention；
Fig. 2 is the schematic diagram of the infiltration room of natural gas hydrate permeability measurement device of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
Fig. 1 and Fig. 2 are please referred to, the embodiment provides a kind of natural gas hydrate permeability measurement device, packets
Infiltration room 9, temperature control system and air compressor 14 are included, further includes osmosis system and discharge pipe 35, the measurement and control of temperature system
It unites and connect with the infiltration room 9 to permeate the temperature of room 9 described in observing and controlling, the air compressor 14 is connect with the infiltration room 9
To provide confining pressure appropriate for it, by the temperature control system with the confining pressure come simulating natural environment to guarantee testing
Gas hydrates style 25 is stabilized in the process.The osmosis system and the discharge pipe 35 with the infiltration room 9
Connect the steady seepage to guarantee gas phase or liquid phase in experimentation.
Fig. 1 and Fig. 2 are please referred to, the infiltration room 9 includes mistress 22 and the interior room 23 being contained in the mistress 22, described
About 22 mistress is bound, and bottom wall is installed on pedestal 26, is pressed with pressing plate 21 on the roof of the mistress 22.The measurement and control of temperature
System includes temperature sensor 20, and the temperature sensor 20 is set in the inside sidewalls of the mistress 22 and and computer system
19 connections, the temperature sensor 20 is able to detect the temperature of the mistress 22 and the temperature that will test out reaches the computer
System 19 is shown.About 23 interior room binds, and the bottom wall of the interior room 23 is connect with the bottom wall of the mistress 22, and position
There is gap between the center of the bottom wall of the mistress 22, the roof of the interior room 23 and the roof of the mistress 22,
Also there is gap, the side wall of the interior room 23 and the mistress 22 between the side wall of the interior room 23 and the side wall of the mistress 22
Side wall between gap and the interior room 23 roof and the mistress 22 roof between gap collectively form the first space.
The mistress 22 and the interior room 23 are all made of 304 stainless steels as material, and the mistress 22 is 35cm high, and the interior room 23 is high
20cm, 23 pressure resistance 30MPa of the mistress 22 and the interior room.
The rubber pattern 41 of upper and lower opening is equipped in the interior room 23, two permeable stone 24a, 24b are setting up and down and are stuck in described
In rubber pattern 41, the gas hydrates style 25 is wrapped up by the rubber pattern 41 and is stuck in described two permeable stones 24a, 24b
Between, sealing ring is equipped between each described permeable stone 24a, 24b and the inner wall of the rubber pattern 41, to prevent gas and liquid
Pass through from the edge of described permeable stone 24a, 24b.The circle that the gas hydrates style 25 is a height of 80mm, diameter is 40mm
Cylinder.Two described permeable stone 24a, 24b are respectively positioned on inside the rubber pattern 41, each described permeable stone 24a, 24b with it is right therewith
The opening for the rubber pattern 41 answered has appropriately distance.The lower end of the rubber pattern 41 is connect with the bottom wall of the interior room 23
And it is located at the center of the bottom wall of the interior room 23, have between the upper end of the rubber pattern 41 and the roof of the interior room 23
Interval, between the side wall of the rubber pattern 41 and the side wall of the interior room 23 also have interval, the side wall of the rubber pattern 41 and
Interval between roof and the side wall and roof of the interior room 23 constitutes second space.
The lower end of one reinforcing pipe 42 is passed down through the roof of the interior room 23 and extends to the upper end of the rubber pattern 41 and opens
At mouthful, the upper end of the reinforcing pipe 42 sequentially passes through the roof and the pressing plate 21 and the pressing plate of emerging of the mistress 22 upwards
21, one end of the discharge pipe 35 is passed through from the inside of the reinforcing pipe 42 to be then proceeded to extend downwardly up to connection is located above
The permeable stone 24a, the other end of the discharge pipe 35, which extends outwardly and passes through triple valve, is separately connected vacuum pump 16, gas
Recyclable device 17 and liquid flow measurement device, the liquid flow measurement device are graduated cylinder 18.
The temperature control system further includes liquid nitrogen container 12 and circulating pump 11, and the liquid nitrogen container 12 is connected by third piping 33
The circulating pump 11 is connect, to provide coolant liquid nitrogen for the circulating pump 11, the circulating pump 11 is connected with 27 He of an inlet tube
One return pipe 28, the inlet tube 27 and the return pipe 28 pass through the pedestal 26 and protrude into first space and the feed liquor
Pipe 27 and the return pipe 28 are placed in the opposite both sides of the interior room 23 in the outlet end in first space, and liquid nitrogen is described
Under the action of circulating pump 11, followed in the inlet tube 27, first space, the return pipe 28 and the circulating pump 11
Ring.By the circulation rate of the liquid nitrogen, to regulate and control the temperature of the infiltration room 9, make the temperature of the infiltration room 9 be maintained at-
20~4 DEG C.The third piping 33 is equipped with valve 3f, closes valve 3f, and the liquid nitrogen container 12 stops supplying the liquid nitrogen.
The lower end of one confining pressure air inlet pipe 29 sequentially passes through the pressing plate 21, the roof of the mistress 22 and the interior room 23
Roof protrudes into the second space, and the air compressor 14 passes sequentially through pressure reducing valve 2b and the first piping 31 connects the confining pressure
The upper end of air inlet pipe 29, so that the air compressor 14 can according to need through the confining pressure air inlet pipe 29 to described second
Gas is injected in space makes the second space have certain confining pressure, and the confining pressure is 0~30MPa.The confining pressure air inlet pipe 29
Be equipped with pressure sensor 4c for measuring the confining pressure in the second space, be additionally provided with valve 3d, the confining pressure into
The pressure sensor 4c on tracheae 29 be located at the valve 3d in the confining pressure air inlet pipe 29 and the infiltration room 9 it
Between.
One end of one second piping 32 connects first piping 31 and the confining pressure air inlet pipe 29, second pipe simultaneously
It is 32 other end connection osmosis system, second piping 32 is also equipped with valve 3c.
The osmosis system include air accumulator 5, the air inlet pipe and an air outlet pipe 37 being connect with the upper end of the air accumulator 5, with
The outlet pipe 36 of the lower end connection of the air accumulator 5 and pipe 38 is penetrated into, described one end for penetrating into pipe 38 while connected
The escape pipe 37 and the outlet pipe 36 are connect, the other end connects the underlying permeable stone 24b, second piping 32
The air inlet pipe is connected, a methane gas cylinder 1 passes through the corresponding pressure reducing valve 2a connection air inlet pipe.It is also equipped in the air inlet pipe
Valve 3a, and it is additionally provided with the pressure sensor 4a for measuring the air pressure in the air accumulator 5.The escape pipe 37 is equipped with
The gas flowmeter 6 and intake valve 7, are additionally provided with a valve 3b, and the gas flowmeter 6 is located at valve 3b and the air inlet
Between valve 7, and the valve 7 is closer to the air accumulator 6.The outlet pipe 36 is equipped with inlet valve 8, the gas flowmeter 6
For measuring the gas flow in the escape pipe 37.
One differential pressure measurement system it is associated with the discharge pipe 35 and the osmosis system with measure it is described infiltration room into
Pressure difference out.Specifically, the pressure sensor for penetrating into the admission pressure that pipe 38 is equipped with for measuring the infiltration room 9
4b, the discharge pipe 35 are equipped with the pressure sensor 4d of air outlet valve 13 and the outlet pressure for measuring the infiltration room 9, institute
Stating differential pressure measurement system includes penetrating into pipe 38 and two pressure sensors on the discharge pipe 35 positioned at described
4b, 4d or the differential pressure measurement system include the differential pressure indicator 10 that pipe 38 and the discharge pipe 35 are penetrated into described in connection, or
Person includes penetrating into pipe 38 and two described pressure sensor 4b, 4d and company on the discharge pipe 35 positioned at described simultaneously
Connect the differential pressure indicator 10 for penetrating into pipe 38 and the discharge pipe 35.In the present embodiment, the differential pressure measurement system is wrapped simultaneously
It includes and penetrates into pipe 38 and two described pressure sensor 4b, 4d and the connection infiltration on the discharge pipe 35 described in being located at
Penetrate into the differential pressure indicator 10 into pipe 38 and the discharge pipe 35.The differential pressure indicator 10 can directly measure the discharge pipe 35 and institute
State the pressure difference penetrated between pipe 38.
The 4th piping 34 is connected on first piping 31, the 4th piping 34 is connect with nitrogen cylinder 15, and described
Four pipings 34 are equipped with valve 3e.
The gas hydrates style 25 is put into natural gas hydrate permeability measurement device of the present invention
The infiltration room 9 process are as follows: after the gas hydrates style 25 made is packaged with the rubber pattern 41, on
Lower both ends are bound respectively with two described permeable stone 24a, 24b and back cover, then with the sealing snare in described permeable stone 24a, 24b
Around, to prevent gas and liquid from passing through from the edge of described permeable stone 24a, 24b.The rubber pattern 41 is put into the interior room
In 23, the interior room 23 and the mistress 22 and the pedestal 26 are assembled, finally connect other systems pipeline and route.Then
It can use the infiltration room and carry out permeation experiment or infiltration experiment.
The infiltration room 9 in natural gas hydrate permeability measurement device of the present invention is detachable apparatus, is made
Used time assembles it according to the above process, when not in use, opposite process disassembly according to the above process, thus the infiltration room
It is not only convenient for collecting and carry, but also it is convenient to use after cleaning and cleaning to the infiltration room, be conducive to described
The maintenance and maintenance for permeating room 9, make it have longer service life, while the clean infiltration room 9 being kept to will not influence
The experiment effect of this experiment and experiment next time facilitates the accuracy rate and confidence level that promote experimental result.
When doing infiltration experiment using natural gas hydrate permeability measurement device of the present invention:
First choice opens the valve 3e on the nitrogen cylinder 15 and the 4th piping 34, using in the nitrogen cylinder 15
Nitrogen examines the leakproofness of the entire natural gas hydrate permeability measurement device.After confirmation leakproofness is errorless, open
Coolant (liquid nitrogen) is passed through institute through the circulating pump 11 by the valve 3f on the third piping 33 by the liquid nitrogen container 12
It states in the first space 22, -20~4 DEG C of guarantee test required temperature, temperature is read by the temperature sensor 20 and reached described
Computer system 19 is shown；A certain amount of distilled water is injected toward 5 lower part of air accumulator, water is about the air accumulator 5
The 1/5 of volume；Then with the discharge pipe 35 is connected to the vacuum pump 16, the air outlet valve 13 is opened, institute is simultaneously closed off
State inlet valve 7 and the intake valve 8；The vacuum pump 16 is opened, half an hour is vacuumized, the interior room 23 is made to reach vacuum shape
State, then top, which is always maintained at, vacuumizes, and at this moment opens the inlet valve 8, and water suction keeps the gas hydrates style 25 full
With make in the gas hydrates style 25 there is no gas phase；The air outlet valve 13 is closed, again into the air accumulator 5
It is stored in the distilled water of sufficient amount, the air compressor 14 is opened, through on corresponding pressure reducing valve 2b, second piping 32
Valve 3c, the valve 3a in the air inlet pipe 5 squeeze into certain pressure into the air accumulator, flow through distilled water described
Gas hydrates style 25, and be discharged by the discharge pipe 35；The vacuum pump 16 is closed, the discharge pipe 35 connects rubber
Pipeline, the rubber tubing are inserted into the graduated cylinder 18, after outflow water speed, which reaches, to be stablized, record fluid flow.
When doing permeation experiment using natural gas hydrate permeability measurement device of the present invention:
Open the valve 3e on the nitrogen cylinder 15 and the 4th piping 34, using the nitrogen in the nitrogen cylinder 15 come
Examine the leakproofness of the entire natural gas hydrate permeability measurement device.After confirmation leakproofness is errorless, the liquid is opened
Coolant (liquid nitrogen) is passed through described first through the circulating pump 11 by the valve 3f on the third piping 33 by nitrogen tank 12
In space 22, -20~4 DEG C of guarantee test required temperature, temperature is read by the temperature sensor 20 and reaches the computer
System 19 is shown；The valve 3d in the confining pressure air inlet pipe 29 is opened, by the air compressor 14, with the air
The corresponding pressure reducing valve 2b of compressor 14 is to the air of the interior room 23 injection certain pressure, and as confining pressure, pressure is by the confining pressure
Pressure sensor 4c is measured in air inlet pipe 29；The discharge pipe 31 is connect with the gas concentration unit 17, opening is described out
Air valve 13, pressure are measured by the pressure sensor 4d on the discharge pipe 31, which is the air pressure out of the permeation room 9
Power；Then turn on the valve 3a in the air inlet pipe, first with the methane gas cylinder 1 by corresponding pressure reducing valve 2a to the gas storage
Tank 5 squeezes into the gas of certain pressure, and pressure is measured by the pressure sensor 4a in the air inlet pipe；Close the confining pressure air inlet pipe
Valve 3d on 29, confining pressure has been kept fixed at this time, on the valve 3c, the escape pipe 37 on opening second piping 32
Valve 3b and the intake valve 7, communicate the lower part of the permeation room 9 and the top of the air accumulator 5, pass through the air
Compressor 14 into the air accumulator 5 in squeeze into the pressure of setting, pressure is by the pressure sensor penetrated on pipe 38
4b is measured, which is the admission pressure of the permeation room；It is after pressure stabilisation, maintain certain air pressure to carry out permeation test,
The gas flow observed in the escape pipe 37 changes with time, and draws real-time gas flow curve, until gas flow
Stablize, obtains the gas hydrates style 25 under 25 both ends differential pressure of given confining pressure and the gas hydrates style
Regime flow, gas flow are read by the gas flowmeter 6.
The permeability that gas hydrates style gas-phase permeation 25 is calculated using formula (1) is calculated using formula (2)
The permeability of gas hydrates style liquid infiltration 25:
In formula: K is the permeability of gas phase or liquid natural gas hydrate style 25；μ is gas or coefficient of viscosity；L
For the height of gas hydrates style；QBFor gas flow；Q is fluid flow；PA、PBThe respectively described differential pressure measurement system
The infiltration room 9 measured into and out of pressure；A is the sectional area of gas hydrates style 25.The gas hydrates
The height and cross-sectional area of style 25 have unified size；Gas flow is obtained by the gas flowmeter 6；Fluid flow is by measuring
Cylinder 18 obtains；The coefficient of viscosity of gas or liquid can be inquired by laboratory manual.Utilize gas hydrates of the present invention
Permeability determination device, by changing the infiltration temperature of the room 9, saturation degree of the gas hydrates style 25, described
The parameters such as infiltration 9 confining pressure of room are tested to do the infiltration experiment and the permeation, to observe all kinds of parameters to gas hydrates
The affecting laws and sensibility of the permeability of deposit.
Natural gas hydrate permeability measurement device of the present invention can be completed to measure natural gas hydrate deposits object
The test of (gas hydrates style 25) gas phase or liquid infiltration rate.Additionally by regulation multiple parameters variable, so as to
Gas (liquid) infiltration and diffusion and mechanism in natural gas hydrate deposits object are analyzed, observes all kinds of parameters to natural gas hydrate deposits
The affecting laws and sensibility of the permeability of object, so that the safe working and submarine landslide judge mode for gas hydrates mention
For basis.
Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of natural gas hydrate permeability measurement device, it is characterised in that: including infiltration room, temperature control system and air
Compressor, the infiltration room include mistress and are contained in the outer indoor interior room, and the interior interior is equipped with the rubber of upper and lower opening
Rubber moulding, two permeable stones are setting up and down and are stuck in the rubber pattern, and gas hydrates style is wrapped up and blocked by the rubber pattern
Between two permeable stone, there is the first space between the side wall of the interior room and the side wall of the mistress, the temperature is surveyed
Control system is connected to inject coolant, the side wall of the rubber pattern and the interior room to first space with first space
Side wall between there is second space, the air compressor is connected to the second space by confining pressure air inlet pipe with to described the
Gas is injected in two spaces and forms certain confining pressure, and the air compressor is connected underlying described permeable by osmosis system
Stone, a discharge pipe one end connect the permeable stone being located above, and the other end stretches out the infiltration room and by triple valve point
Not Lian Jie vacuum pump, gas concentration unit and liquid flow measurement device, a methane gas cylinder connects the osmosis system, the infiltration
The gas flowmeter of measurement gas flow, a differential pressure measurement system and the discharge pipe and the osmosis system are equipped in permeable system
The associated disengaging pressure difference to measure the infiltration room.
2. natural gas hydrate permeability measurement device as described in claim 1, it is characterised in that: the osmosis system includes
Air accumulator, the air inlet pipe and an air outlet pipe being connect with the upper end of the air accumulator, the outlet pipe being connect with the lower end of the air accumulator
And pipe is penetrated into, described one end for penetrating into pipe while the escape pipe and the outlet pipe are connected, other end connection
The underlying permeable stone, the air compressor connect the first piping, and one end of one second piping connects the air inlet
Pipe, the other end connect the confining pressure air inlet pipe and first piping simultaneously, and the methane gas cylinder connects the air inlet pipe, described
Valve is equipped on air inlet pipe, the confining pressure air inlet pipe and second piping, the escape pipe is equipped with the gas flow
Meter and intake valve, the outlet pipe are equipped with inlet valve, the differential pressure measurement system and the discharge pipe and described penetrate into
Pipe is associated.
3. natural gas hydrate permeability measurement device as claimed in claim 2, it is characterised in that: described to penetrate on pipe
Pressure sensor equipped with the admission pressure for measuring the infiltration room, the discharge pipe are equipped with air outlet valve and for measuring
The pressure sensor of the outlet pressure of the infiltration room, the differential pressure measurement system include penetrating into pipe positioned at described and being located at
Two pressure sensors or the differential pressure measurement system on the discharge pipe include penetrating into pipe and institute described in connection
The differential pressure indicator of discharge pipe is stated, or simultaneously includes penetrating into pipe and two pressure on the discharge pipe positioned at described
The differential pressure indicator of pipe and the discharge pipe is penetrated into described in sensor and connection.
4. natural gas hydrate permeability measurement device as claimed in claim 2, it is characterised in that: the air inlet pipe is equipped with
For measuring the pressure sensor of the air pressure in the air accumulator, the confining pressure air inlet pipe is equipped with empty for measuring described second
The pressure sensor of interior confining pressure；The pressure sensor of the confining pressure air inlet pipe be located at the corresponding valve with it is described
It permeating between room, a valve is also equipped on the escape pipe, the gas flowmeter is located between the valve and the intake valve,
And the valve is closer to the air accumulator.
5. natural gas hydrate permeability measurement device as claimed in claim 2, it is characterised in that: connect on first piping
It is connected to the 4th piping, the 4th piping is connect with nitrogen cylinder, and the 4th piping is equipped with valve；The air compressor is logical
It crosses a gas pressure reducer to connect with first piping, the methane gas cylinder is connected by another gas pressure reducer and the air inlet pipe
It connects.
6. natural gas hydrate permeability measurement device as described in claim 1, it is characterised in that: the temperature control system
Including liquid nitrogen container and circulating pump, the liquid nitrogen container connects the circulating pump by third piping, the circulating pump be connected with one into
Liquid pipe and a return pipe, the inlet tube and the return pipe protrude into opposite the two of first space and the interior room that is placed in
Side, liquid nitrogen is under the action of the circulating pump, in the inlet tube, first space, the return pipe and the circulating pump
Between recycle, the temperature control system further includes temperature sensor, the temperature sensor be set to the mistress inner wall on
And it is connect with computer system.
7. natural gas hydrate permeability measurement device as claimed in claim 6, it is characterised in that: set on the third piping
There is valve.
8. natural gas hydrate permeability measurement device as described in claim 1, it is characterised in that: calculated using formula (1)
The permeability of gas hydrates style gas-phase permeation out calculates gas hydrates style liquid infiltration using formula (2)
Permeability:
In formula: K is gas phase or liquid natural gas hydrate sediment permeability；μ is gas or coefficient of viscosity；L is natural
The height of gas hydrate style；QBFor gas flow；Q is fluid flow；PA、PBThe respectively described differential pressure measurement system is measured
The infiltration room into and out of pressure；A is the sectional area of gas hydrates style.
9. natural gas hydrate permeability measurement device as described in claim 1, it is characterised in that: the permeable stone with it is described
Sealing ring is equipped between rubber pattern inner wall.
10. natural gas hydrate permeability measurement device as described in claim 1, it is characterised in that: in the second space
Confining pressure be 0~30MPa, the coolant make it is described infiltration it is indoor -20~4 DEG C of temperature.
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