CN106680435B - A kind of hydrate produces sand experimental system for simulating - Google Patents
A kind of hydrate produces sand experimental system for simulating Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention relates to a kind of hydrates to produce sand experimental system for simulating.Exploitation of gas hydrates shakes out experimental system, comprising: autoclave system of subject, pressure system, acoustic systems, methane gas cylinder, temperature control system, gas-liquid solid separation system, servo pressure control system, data collection system etc..Autoclave system of subject, and including reaction under high pressure kettle barrel, upper end cover, lower cover, sand control unit.Control pressurer system, including axis press loading system, pore pressure loading system, counterbalance valve.Axis presses loading system, including oil feeding reservoirs, SERVO CONTROL oil pump, shut-off valve, load plunger.Pore pressure loading system includes water feeding tank, SERVO CONTROL water pump, shut-off valve.The invention has the advantages that this system overcomes the shortcomings that generally going out sand device, can simulate the situation of shaking out under a variety of rock cores and operating condition, more can actual response hydrate formation exploit and shake out state.
Description
Technical field
The present invention relates to a kind of exploitation simulator of gas hydrates and method, in particular to a kind of hydrate is opened
Sand experimental system for simulating is produced, is shake out characteristic and the anti-sand method in simulating hydrate recovery process.
Background technique
Gas hydrates distribution is extensive, and energy density is big, and reserves are big, and global total organic carbon is existing stone
Oil, natural gas and 2 times of coal have huge development potentiality.And China is as maximum energy-consuming state in the world, using energy source
Rate is low, unbalance of structure, and clean energy resource proportion is smaller, and petroleum, coal proportion are high；Therefore low-carbon energy-saving optimizes energy knot
Structure, the trend for developing clean energy resource is the development and utilization place mats road of gas hydrates.
Problem of shaking out as influence Oil & Gas Productivity a key factor, gas hydrates recovery process also
It not can avoid.It is influenced by " decomposition of hydrate effect ", decomposition of hydrate area reservoir cementing properties is deteriorated, mechanical strength significantly drops
It is low, weak cementing, low-intensity is presented, the characteristics of high hole is seeped, is similar to conventional fluff sandstone；At the same time, fluid structure interaction is again
Pressure felt area reservoir effective stress level is caused to increase；The raising of stress level and strength reduction promote resolver to store up
Layer bad stability, for being concentrated apparent nearly well resolver reservoir by wellbore effects stress, in production process
Problem of shaking out significant.
However, being concentrated mainly on quarrying apparatus design and the sand control side of hydrate currently for the research of hydrate experiment
The conceptual design of method, and it is still few for the behavioral study that shakes out in recovery process, such as: the hair of application number 201410098311.6
Bright patent is devised the quarrying apparatus that decompression is decomposed, but can not be studied the characteristics of exploitation is shaked out and rule in a manner of experiment,
Only notional mode.The patent of invention of application number 201610224449.5 devises a kind of more and sand control of decompression exploitation
Method is equally also notional method, experimental verification and can not carry out research of shaking out.Application number 201610070178.2
Patent of invention cannot load hydrate rock sample, be unable to control the intensity of rock sample, and the rock sample sand production rate and speed of varying strength
It is different.The patent of invention of application number 201510772368.4 can more fully realize that hydrate shakes out the test of characteristic,
But the stratum limited dimension of this unit simulation, radial distance is shorter, can only simulated formation sand producing region.And actual formation by
Pit shaft is followed successively by the area that shakes out outward, and transition region, do not shake out area, so this device has certain gap according to practical sanding formation is simulated.
The patent of invention of application number 201510262557.7, not instead of simulating hydrate decomposition produce gas, produce water process, directly to
Methane and water are passed through in settling sand, the decomposition with hydrate is discrepant；Rock sample size is small, diameter 4cm, length 100cm, mould
Quasi- region is limited；When simulation decompression exploitation, it is unable to control the pressure that end is exploited in outlet end.Apparatus above can not learn rock sample
The mechanical characteristics such as elasticity modulus, Poisson's ratio.
For this reason, it may be necessary to the experimental provision that energy actual response natural gas hydrate stratum exploits state of shaking out is developed, research
It shakes out characteristic, the formulation for sand control measure in hydrate recovery process provides a certain basis.
Summary of the invention
The purpose of the present invention is to drawbacks described above of the existing technology, provide a kind of hydrate exploitation production simulating sand
Experimental system, this system can carry out the experiment of shaking out under different experimental conditions, including different grit sizes, different rock samples are strong
The experiment conditions such as degree, different pressure drop amplitudes, different pressure decay rates, and acoustic detection system is increased, rock sample can be measured
Longitudinal and shear wave detects decomposition position and the mechanical property etc. of hydrate with this.The sand controlling result of different size screen casing can also be tested,
Screen effective sand control method.Increase subsequent gas source, overcome former decomposition of hydrate test in Liquid Flow time short defect,
It is practical to be more in line with production.
A kind of hydrate that the present invention mentions produces sand experimental system for simulating, mainly by autoclave system of subject,
Control pressurer system, acoustic systems, methane gas cylinder, gas-liquid solid separation system, servo pressure control system, data collection system group
At,
The autoclave system of subject includes autoclave (1), upper end cover (19), lower cover (22), sand control list
First (25), wherein the cylinder of autoclave (1) is cylindrical pressure vessel, has a step-like extended cavity in cylinder lower end,
Axis pressure load plunger (2) moves in extended cavity, and lower cover (22) are installed in the lower part of extended cavity, the top of autoclave (1)
Equipped with upper end cover (19), upper end cover (19) center has duct (20)；The upside of axis pressure load plunger (2) is installed by sand control unit
(25)；
The control pressurer system includes axis pressure loading system and pore pressure loading system, is controlled by servo-controlled machines (16)
Output pressure, wherein axis pressure loading system is for loading burden pressure to rock sample, and oil feeding reservoirs (8) is connected to by petroleum pipeline
To SERVO CONTROL oil pump (7) and axis pressure load plunger (2)；Pore pressure loading system includes water feeding tank (6) and SERVO CONTROL water pump
And the threeway (18) that passes through transfer line and the upper end cover of autoclave (1) of water feeding tank (6) and SERVO CONTROL water pump (5) (5),
It is connected, moreover, being close to rock sample (4) on the downside of upper end cover；
Acoustic systems mainly include multiple sonic probes (3) that lineal layout is in the outer of entire reaction under high pressure autoclave body (1)
Side；Methane gas cylinder (17) is commonly connected to the duct (20) of reaction kettle upper end cover (19) by threeway (18) and pore pressure system, makees
Subsequent gas source and pore pressure system after for decomposition of hydrate continue to keep the flowing of gas-liquid together；
Gas-liquid solid separation system includes sand water reservoir (11), moisture trap (13), gas bottle (14), sand water reservoir
(11) it is connected to the duct that shakes out (24) of reaction kettle lower outlet end, the exit of sand water reservoir (11) adds filter screen, for hindering
Every separated sand, sand water reservoir (11) is connected to gas bottle (14) by moisture trap (13)；
Data collection system is used to acquire the burden pressure of longitudinal and shear wave and control pressurer system that sonic probe measures,
Pore pressure.
Preferably, above-mentioned axis pressure load plunger (2) forms staged circle by upper cylindrical body, middle cylindrical body and lower cylindrical body
Column, and the diameter of three is different, center is equipped with duct (24) perforation of shaking out, the channel as sand migration.
Preferably, the outer diameter of above-mentioned upper cylindrical body is consistent with the cylinder internal diameter of autoclave (1), outside middle cylindrical body
Diameter is consistent with the internal diameter of extended cavity, and the outer diameter of lower cylindrical body is consistent with the bore inner diameter of lower cover (22), and middle cylindrical body is outer
Diameter is greater than the outer diameter of upper cylindrical body, and the outer diameter of upper cylindrical body is greater than the outer diameter of lower cylindrical body.
Preferably, pressure gauge (9) are connected below the above-mentioned duct that shakes out (24).
Preferably, it the sand water reservoir (11) in above-mentioned gas-liquid solid separation system and is equipped between moisture trap (13)
Counterbalance valve (12), for adjusting autoclave (1) outlet pressures.
Preferably, above-mentioned acoustic systems are made of five sonic probes (3), and five sonic probe (3) lineal layouts exist
The outside of entire reaction under high pressure autoclave body (1), and sonic probe (3) is the rock sample in autoclave (1) and reaction kettle
(4) fitting contact, can measure the longitudinal and shear wave of rock core (4) different location, to determine decomposition position and the rock sample (4) of hydrate
Elasticity modulus, Poisson's ratio.
Preferably, above-mentioned sand control unit (25) includes sand control screens and two annulus, and sand control screens are made into disc, are clipped in two
Between a annulus.
Preferably, gasket (21) are installed between rock core on the downside of above-mentioned upper end cover (19).
A kind of hydrate that the present invention mentions produces the experimental method of sand experimental system for simulating, including following experiment step
It is rapid:
(a), rock sample (4) are prepared: gasket (21) is put into the upper end of reaction under high pressure autoclave body (1) first；Then using secondary
The mode of synthesis prepares rock sample, and test sand and pure methane hydrate are thoroughly mixed together, are filled in layer by layer
In reaction under high pressure autoclave body (1), then it is close to rock sample and is put into sand control unit (25), is reloaded into axis pressure load plunger (2), finally pacifies
It loads end cap (22), closes autoclave, connect all pipeline and equipment；
(b), fluid injection is pressurizeed: being added burden pressure, is opened the valve of oil feeding reservoirs (8), open shut-off valve, starts servo control liquefaction
It pumps (7), by the oil in oil feeding reservoirs (8) by pipeline, is pumped into pressurization via the oil pressure duct (23) of reaction under high pressure autoclave body (1) lower end
In cavity, so that impeller-hub pressure load plunger (2) squeezes rock sample, when reaching the pressure of setting, SERVO CONTROL oil pump (7) stops
Pressure supply；Pore pressure is loaded, the valve of water feeding tank (6) is opened, opens shut-off valve, starts SERVO CONTROL water pump (5), water is led to
Pipeline is crossed, is flowed through threeway (18), then by upper end cover duct (20), is reached above gasket (21), to more easily be rock sample
(4) add pore pressure；Shut-off valve (10) is always to close in above procedure, when the pressure gauge (9) of reaction under high pressure autoclave body (1) lower end reaches
It when to scheduled pressure, closes SERVO CONTROL water pump (5), closes shut-off valve water feeding tank (6) and its connected, stop pressure supply；
(c), decompression exploitation: keeping environment temperature constant, adjusts counterbalance valve (12) pressure and reaction kettle (1) interior system pressure
Unanimously, it after then the pressure of adjusting counterbalance valve (12) is down to scheduled pressure, opens shut-off valve (10), carries out the decompression of hydrate
Decomposition is shaked out experiment, and acoustic detection system (3) is started to work；Due to the reduction of pressure, decomposition of hydrate, sand, water, gas are from load
The duct that shakes out (24) of plunger (2) is begun to flow out, and into sand water reservoir (11), crosses sand net due to sand water reservoir outlet end
Filtration, only water and methane gas enters in pipeline, flows through counterbalance valve (12), into moisture trap (13), finally
Methane gas is collected in gas bottle (14)；Weighing and calculating is carried out respectively to the sand and methane gas that are collected at regular intervals；
(d), after decomposition of hydrate is complete, also continue to supply by threeway (18) with water feeding tank (6) and methane gas cylinder (17)
Water ventilation, keeps flow；Whole process records pressure and acoustic data by data collection system (15).
Compared with prior art, the beneficial effects of the present invention are:
(1) (including the different sand under different decompression mining conditions of the hydrate rock sample under different occurrence conditions can be carried out
Grain granularity, different rock sample intensity, different pressure drop amplitudes, different pressure decay rates) experiment of shaking out, that is, simulate different sedimentary conditions and
Decompression mode, studies the feature of shaking out of hydrate layer, and evaluates sand control measure, preferably anti-sand method；(2) cylinder is tested
Volume is big, ensure that rock sample has enough sizes, can simulate realistically ground environment when shaking out；(3) pressure of axis used in system
The load plunger of system, using staged cylinder, required load power is small, reduces the pump pressure requirement of oil pump, increases and cover pressure
Power can loading range；(4) increased methane gas source, keeps Liquid Flow together with pore pressure system after decomposition of hydrate is complete,
Long-time production in the practical exploitation of simulation, keeps sand production rate more accurate；(5) SERVO CONTROL oil pump is used, dynamic applies axial
Pressure；(6) increase acoustic systems, the longitudinal and shear wave of rock sample can be measured, elasticity modulus, Poisson's ratio of rock sample etc. are calculated in real time
Mechanics parameter, to analyze rock sample mechanics parameter with the relationship of decomposition of hydrate；Rock can also be detected according to the variation of longitudinal and shear wave
The decomposition position of hydrate in sample.
Detailed description of the invention
Attached drawing 1 is overall structure diagram of the invention；
Attached drawing 2 is the structural schematic diagram of autoclave；
Attached drawing 3 is sanding formation block plan of the present invention；
In upper figure: 1. autoclaves, 2. load plungers, 3. sonic probes, 4. rock samples, 5. SERVO CONTROL water pumps 6. supply
Water tank, 7. SERVO CONTROL oil pumps, 8. oil feeding reservoirs, 9. pressure gauges, 10. shut-off valves, 11. sand water reservoir, 12. counterbalance valves, 13. gas
Separator, 14. gas bottles, 15. data collectors, 16. servo-controlled machines, 17. methane gas cylinders, 18. threeways；19. upper end cover,
20. duct, 21. gaskets, 22. lower covers, 23. oil pressure ducts, 24. shake out duct, 25. sand control units, 26.O type circle.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
A kind of hydrate that the present invention mentions produces sand experimental system for simulating, mainly by autoclave system of subject,
Control pressurer system, acoustic systems, methane gas cylinder, gas-liquid solid separation system, servo pressure control system, data collection system group
At,
The autoclave system of subject includes autoclave 1, upper end cover 19, lower cover 22, sand control unit 25,
In, the cylinder of autoclave 1 is cylindrical pressure vessel, has a step-like extended cavity, axis pressure load column in cylinder lower end
Plug 2 moves in extended cavity, and lower cover 22 is installed in the lower part of extended cavity, and the top of autoclave 1 is equipped with upper end cover 19, upper end
There is duct 20 at 19 center of lid；The upside of axis pressure load plunger 2 is installed by sand control unit 25；
The control pressurer system includes axis pressure loading system and pore pressure loading system, is controlled by servo-controlled machines 16 defeated
Pressure out, wherein axis pressure loading system is for loading burden pressure to rock sample, and oil feeding reservoirs 8 is communicated to by petroleum pipeline to be watched
Take control oil pump 7 and axis pressure load plunger 2；Pore pressure loading system includes water feeding tank 6 and SERVO CONTROL water pump 5, and 6 He of water feeding tank
SERVO CONTROL water pump 5 is connected by transfer line with the threeway 18 of the upper end cover of autoclave 1, moreover, tight on the downside of upper end cover
Paste rock sample 4；
Acoustic systems include mainly five sonic probes 3, and lineal layout is in the outside of entire reaction under high pressure autoclave body 1；First
Alkane gas cylinder 17 is commonly connected to the duct 20 of reaction kettle upper end cover 19 by threeway 18 and pore pressure system, as decomposition of hydrate knot
Subsequent gas source and pore pressure system after beam continue to keep the flowing of gas-liquid together；
Gas-liquid solid separation system includes sand water reservoir 11, moisture trap 13, gas bottle 14, and sand water reservoir 11 connects
In the duct 24 that shakes out of reaction kettle lower outlet end, the exit of sand water reservoir 11 adds filter screen, for obstructing separated sand, sand
Water reservoir 11 is connected to gas bottle 14 by moisture trap 13；
Data collection system is that the longitudinal and shear wave and pressure control system that sonic probe measures are acquired by data collector 15
The burden pressure of system, pore pressure.
Preferably, above-mentioned axis pressure load plunger 2 forms staged circle by upper cylindrical body, middle cylindrical body and lower cylindrical body
Column, and the diameter of three is different, center is equipped with the perforation of duct 24 of shaking out, the channel as sand migration.
Preferably, the outer diameter of above-mentioned upper cylindrical body is consistent with the cylinder internal diameter of autoclave 1, the outer diameter of middle cylindrical body
Consistent with the internal diameter of extended cavity, the outer diameter of lower cylindrical body is consistent with the bore inner diameter of lower cover 22, and the outer diameter of middle cylindrical body is big
In the outer diameter of upper cylindrical body, the outer diameter of upper cylindrical body is greater than the outer diameter of lower cylindrical body.
Preferably, pressure gauge 9 is connected below the above-mentioned duct 24 that shakes out.
Preferably, the sand water reservoir 11 in above-mentioned gas-liquid solid separation system and between moisture trap 13 be equipped with back pressure
Valve 12, for adjusting 1 outlet pressures of autoclave.
Preferably, above-mentioned acoustic systems are made of five sonic probes 3, and five 3 lineal layouts of sonic probe are entire
The outside of reaction under high pressure autoclave body 1, and sonic probe 3 is to contact across autoclave 1 with the fitting of rock sample 4 in reaction kettle,
The longitudinal and shear wave of 4 different location of rock core can be measured, to determine elasticity modulus, the Poisson's ratio for decomposing position and rock sample 4 of hydrate.
Preferably, above-mentioned sand control unit 25 includes that sand control screens and two annulus, sand control screens are made into disc, is clipped in two
Between annulus, and it can according to need and replace different specifications.
Preferably, gasket 21 is installed between above-mentioned 19 downside of upper end cover and rock core.
A kind of hydrate that the present invention mentions produces the experimental method of sand experimental system for simulating, including following experimental procedure
(whole experiment process and operation carry out in freezer):
A, it prepares rock sample 4: gasket 21 is put into the upper end of reaction under high pressure autoclave body 1 first；Then the side of secondary synthesis is used
Formula prepares rock sample, and test sand and pure methane hydrate are thoroughly mixed together, are filled in reaction under high pressure layer by layer
In autoclave body 1, then it is close to rock sample and is put into sand control unit 25, is reloaded into axis pressure load plunger 2, lower cover 22, envelope are finally installed
Autoclave is closed, all pipeline and equipment are connected；
B, fluid injection is pressurizeed: add burden pressure, open the valve of oil feeding reservoirs 8, open shut-off valve, starts SERVO CONTROL oil pump 7,
By the oil in oil feeding reservoirs 8 by pipeline, it is pumped into pressurized cavity via the oil pressure duct 23 of 1 lower end of reaction under high pressure autoclave body, thus
Impeller-hub pressure load plunger 2 squeezes rock sample, and when reaching the pressure of setting, SERVO CONTROL oil pump 7 stops pressure supply；Load hole
Pressure opens the valve of water feeding tank 6, opens shut-off valve, starts SERVO CONTROL water pump 5, by water by pipeline, flows through threeway 18,
Again by upper end cover duct 20,21 top of gasket is reached, to be more easily rock sample 4 plus pore pressure；Shut-off valve in above procedure
10 be always to close, and when the pressure gauge 9 of 1 lower end of reaction under high pressure autoclave body reaches scheduled pressure, closes SERVO CONTROL water pump
5, the shut-off valve closing water feeding tank 6 and its being connected stops pressure supply；
C, decompression exploitation: keeping environment temperature constant, and adjusting 12 pressure of counterbalance valve is consistent with system pressure in reaction kettle 1,
Then after the pressure of adjusting counterbalance valve 12 is down to scheduled pressure, shut-off valve 10 is opened, the decompression decomposition for carrying out hydrate is shaked out
Experiment, acoustic detection system 3 are started to work；Due to the reduction of pressure, decomposition of hydrate, sand, water, gas go out from load plunger 2
Sand hole road 24 is begun to flow out, and (is kept away into sand water reservoir 11 due to the filtration for crossing sand net of sand water reservoir outlet end
Exempt from sand flow and cross counterbalance valve, be back pressure defective valve), only water and methane gas enters in pipeline, counterbalance valve 12 is flowed through, into air water
Separator 13, last methane gas are collected in gas bottle 14；At regular intervals to the sand and methane gas being collected into respectively into
Row weighing and calculating；
D, after decomposition of hydrate is complete, ventilation of supplying water also is continued by threeway 18 with water feeding tank 6 and methane gas cylinder 17, is protected
Hold flow；Whole process records pressure and acoustic data by data collection system 15.
Compared with prior art, the invention has the characteristics that
(1) (including the different sand under different decompression mining conditions of the hydrate rock sample under different occurrence conditions can be carried out
Grain granularity, different rock sample intensity, different pressure drop amplitudes, different pressure decay rates) experiment of shaking out, that is, simulate different sedimentary conditions and
Decompression mode, studies the feature of shaking out of hydrate layer, and evaluates sand control measure, preferably anti-sand method；
(2) test cylinder volume is big, ensure that rock sample has enough sizes, can simulate realistically stratum when shaking out
Environment (such as Fig. 3), when shaking out, stratum can be divided into three regions by pit shaft (port that shakes out of corresponding reaction kettle) outward, wrap
Include that sand area (plastic zone), transition region (elasto-plastic range (elasto-plastic region)), do not shake out area (elastic region), small rock core is unable to complete this function；
(3) axis used in presses the load plunger of system, and using staged cylinder, an end area major diameter is 150mm, one end
Area minor diameter is 100mm, i.e. the area of oil pressure load end face is about 2 times with rock core contact face area, and required load is dynamic
Power is small, reduces the pump pressure requirement of oil pump, and increase burden pressure can loading range；
(4) increased methane gas source, keeps Liquid Flow after decomposition of hydrate is complete together with pore pressure system, and simulation is practical
Long-time production in exploitation, keeps sand production rate more accurate；
(5) SERVO CONTROL oil pump is used, dynamic applies axial compressive force；
(6) increase acoustic systems, the longitudinal and shear wave of rock sample can be measured, elasticity modulus, the Poisson of rock sample are calculated in real time
Than etc. mechanics parameters, to analyze rock sample mechanics parameter with the relationship of decomposition of hydrate；It can also be detected according to the variation of longitudinal and shear wave
Out in rock sample hydrate decomposition position.
The above, is only part preferred embodiment of the invention, and anyone skilled in the art may benefit
Equivalent technical solution is modified or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (6)
1. a kind of hydrate produces sand experimental system for simulating, it is characterized in that: mainly by autoclave system of subject, pressure control
System processed, acoustic systems, methane gas cylinder, gas-liquid solid separation system, servo pressure control system, data collection system composition,
The autoclave system of subject includes autoclave (1), upper end cover (19), lower cover (22), sand control unit
(25), wherein the cylinder of autoclave (1) is cylindrical pressure vessel, has a step-like extended cavity, axis in cylinder lower end
Pressure load plunger (2) moves in extended cavity, and lower cover (22) are installed in the lower part of extended cavity, and autoclave is set at the top of (1)
Have upper end cover (19), upper end cover (19) center there are duct (20)；The upside of axis pressure load plunger (2) is installed by sand control unit (25)；
The control pressurer system includes axis pressure loading system and pore pressure loading system, is controlled and is exported by servo-controlled machines (16)
Pressure, wherein axis pressure loading system is for loading burden pressure to rock sample, and oil feeding reservoirs (8) is communicated to by petroleum pipeline to be watched
Take control oil pump (7) and axis pressure load plunger (2)；Pore pressure loading system includes water feeding tank (6) and SERVO CONTROL water pump (5), and
Water feeding tank (6) and SERVO CONTROL water pump (5) are connected by transfer line with the threeway (18) of the upper end cover of autoclave (1),
Moreover, being close to rock sample (4) on the downside of upper end cover；
Acoustic systems include mainly multiple sonic probes (3), and lineal layout is in the outside of entire reaction under high pressure autoclave body (1)；First
Alkane gas cylinder (17) is commonly connected to the duct (20) of reaction kettle upper end cover (19) by threeway (18) and pore pressure loading system, as
Subsequent gas source and pore pressure loading system after decomposition of hydrate continue to keep the flowing of gas-liquid together；
Gas-liquid solid separation system includes sand water reservoir (11), moisture trap (13), gas bottle (14), sand water reservoir (11)
It is connected to the duct that shakes out (24) of reaction kettle lower outlet end, the exit of sand water reservoir (11) adds filter screen, for obstructing point
From sand grains, sand water reservoir (11) is connected to gas bottle (14) by moisture trap (13)；
Data collection system is used to acquire the burden pressure of longitudinal and shear wave and control pressurer system that sonic probe measures, gap
Pressure；
Described axis pressure load plunger (2) forms staged cylinder by upper cylindrical body, middle cylindrical body and lower cylindrical body, and three
Diameter is different, and center is equipped with duct (24) perforation of shaking out, the channel as sand migration；
The outer diameter of the upper cylindrical body is consistent with the cylinder internal diameter of autoclave (1), the outer diameter and extended cavity of middle cylindrical body
Internal diameter it is consistent, the outer diameter of lower cylindrical body is consistent with the bore inner diameter of lower cover (22), and the outer diameter of middle cylindrical body be greater than upper circle
The outer diameter of cylinder, the outer diameter of upper cylindrical body are greater than the outer diameter of lower cylindrical body.
2. hydrate according to claim 1 produces sand experimental system for simulating, it is characterized in that: the duct that shakes out
(24) lower section connects pressure gauge (9).
3. hydrate according to claim 1 produces sand experimental system for simulating, it is characterized in that: the gas-liquid-solid separates
Counterbalance valve (12) are equipped between sand water reservoir (11) in system and moisture trap (13), for adjusting autoclave
(1) outlet pressures.
4. hydrate according to claim 1 produces sand experimental system for simulating, it is characterized in that: the acoustic systems by
Five sonic probes (3) composition, five sonic probe (3) lineal layouts are in the outside of entire reaction under high pressure autoclave body (1), and sound
Wave probe (3) is to contact across autoclave (1) with rock sample (4) fitting in reaction kettle, can measure the different positions of rock sample (4)
The longitudinal and shear wave set, to determine the decomposition position of hydrate and elasticity modulus, the Poisson's ratio of rock sample (4).
5. hydrate according to claim 1 produces sand experimental system for simulating, it is characterized in that: the sand control unit
It (25) include sand control screens and two annulus, sand control screens are made into disc, are clipped between two annulus.
6. hydrate according to claim 1 produces sand experimental system for simulating, it is characterized in that: the upper end cover (19)
Gasket (21) are installed between downside and rock core.
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