CN108086960A - A kind of water erosion method exploitation of gas hydrates experimental simulation method and apparatus - Google Patents
A kind of water erosion method exploitation of gas hydrates experimental simulation method and apparatus Download PDFInfo
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- CN108086960A CN108086960A CN201711312904.8A CN201711312904A CN108086960A CN 108086960 A CN108086960 A CN 108086960A CN 201711312904 A CN201711312904 A CN 201711312904A CN 108086960 A CN108086960 A CN 108086960A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 59
- 230000003628 erosive effect Effects 0.000 title claims abstract description 18
- 150000004677 hydrates Chemical class 0.000 title claims abstract description 18
- 238000004088 simulation Methods 0.000 title claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 37
- 238000002474 experimental method Methods 0.000 claims description 17
- 239000004576 sand Substances 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 238000004321 preservation Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 239000002352 surface water Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 55
- 238000000605 extraction Methods 0.000 abstract description 8
- 230000006837 decompression Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000013459 approach Methods 0.000 abstract description 2
- 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 abstract description 2
- -1 natural gas hydrates Chemical class 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention belongs to exploiting ocean natural gas hydrates technical fields, are related to a kind of water erosion method exploitation of gas hydrates experimental simulation method and apparatus.Deficiency of the present invention present in for current hydrate recovery process, the influence being stabilized based on water flowing to hydrate, utilize the decomposition of the hydrate caused by caused difference in chemical potential between hydrate phase and ambient water phase during water flowing, and influence of the water flowing speed to decomposition of hydrate speed speed, with reference to other hydrate development approaches such as decompression extraction system, heat injection extraction systems, a kind of water erosion method exploitation of gas hydrates experimental simulation method and apparatus is provided.The present invention provides foundation for the safety and high efficiency of realization hydrate, meanwhile, have great importance for the follow-up study of gas hydrate mining methods.
Description
Technical field
The invention belongs to exploiting ocean natural gas hydrates technical fields, and in particular to a kind of water erosion method gas water
Close object extracting experiment analogy method and device.
Background technology
Gas hydrates have high-energy density, large storage capacity, sustainable, environment is friendly as a kind of alternative new energy
The features such as good, exploitation development prospect are wide.The energy-consuming in China can effectively be changed by realizing the exploitation of gas hydrates
Structure has great importance for the development of China's energy industry.Gas hydrates are as one kind by water and natural gas group
Into kinetically unstable complex, only can just be generated when balancing each other following.The factor for influencing natural gas hydrate phase balance emulation is main
Including：Chemical potential, temperature, pressure etc., once some conditions therein change, gas hydrates will decompose.At present
It is decompression extraction system worldwide to study most commonly used, and this method has the characteristics that simple economy, effective.But it is depressured
The shortcomings that present in extraction system, is also particularly evident.Water erosion method at present is exploited compared to decompression, can be very good to solve to avoid
Its there are the problem of and important method as following hydrate exploitation.Water erosion method solves other recovery methods and deposits
The problem of：Firstth, other methods are solved in hydrate exploitation, since hydrate largely decomposes heat absorption and a large amount of gas
Pressure caused by body increases, reservoir temperature rapid drawdown caused by flow faster etc., and stratum is caused to freeze and the generation of secondary hydrate,
Reduce reservoir permeability, influence production efficiency and it is safe the problem of.Second：It solves other methods and exploits production in the hydrate later stage
The problem of gas is extremely inefficient.3rd, decomposition of hydrate caused by solving other recovery methods is exceedingly fast, and causes the prominent of underlying strength
It so reduces, the problem of causing bottom unstability, cause unnecessary natural calamity.
For the deficiency present in the recovery process of current hydrate, the present invention provides a kind of water erosion method natural gases
Hydrate extracting experiment analogy method and device.
The content of the invention
Deficiency of the present invention present in for the recovery process of current hydrate, is stabilized hydrate based on water flowing
Influence, hydrate caused by utilizing during water flowing caused by difference in chemical potential between hydrate phase and ambient water phase
Decompose and influence of the water flowing speed to decomposition of hydrate speed speed, with reference to decompression extraction system, heat injection extraction system etc. other
Hydrate development approach provides a kind of water erosion method exploitation of gas hydrates experimental simulation method and apparatus.To realize
The safety and high efficiency of hydrate provides foundation.
Technical scheme：
A kind of water erosion method exploitation of gas hydrates experimental simulation device, including reaction of formation system, injected system,
Separated collection system and detection and four part of data collecting system；
The reaction of formation system includes reaction kettle 3,10 and first water bath with thermostatic control 13-1 of sand filter；Described is anti-
Kettle 3 is answered to be placed in the first water bath with thermostatic control 13-1, reaction kettle 3 carries the cylinder of boss structure for both ends, is easy to implement hydrate
Axial flowing, for the generation of gas hydrates, and then simulate gas hydrates reservoir；The sand filter 10
Totally two, installation respectively is connected with 3 both ends of reaction kettle, the sand leakage during generating process and water flowing is prevented, to pipe
Road generates blocking, influences the measurement of experimental result；The first water bath with thermostatic control 13-1 provides stable for the generation of hydrate
Low temperature environment；
The injected system includes high-precision gas injection pump 1-1, high-precision water injecting pump 1-2, source of the gas 2, the first unidirectional needle-valve
12-1, the second unidirectional needle-valve 12-2, the 3rd unidirectional needle-valve 12-3, the 4th unidirectional needle-valve 12-4 and the second water bath with thermostatic control 13-2；Institute
The source of the gas 2 stated enters high-precision gas injection by the first unidirectional needle-valve 12-1 and pumps in 1-1；The high-precision gas injection pump 1-1 and height
Precision water injecting pump 1-2 comes together in the 4th unidirectional needle-valve 12- by the second unidirectional unidirectional needle-valve 12-3 of needle-valve 12-2 and the 3rd respectively
4, then be connected with the input end of reaction kettle 3；Hydrate generates required water and is provided by high-precision water injecting pump 1-2, hydrate life
It is provided into required methane gas by high-precision gas injection pump 1-1；The second water bath with thermostatic control 13-2 pumps for high-precision gas injection
1-1 and high-precision water injecting pump 1-2 provides stationary temperature condition；After hydrate has generated, by adjusting the second water bath with thermostatic control
13-2 is to change the temperature of water in high-precision water injecting pump 1-2, and using not pumping the pressure x velocity shaping modes of itself by water continuously not
In disconnected injection reaction kettle 3；
The separated collection system includes gas and water separator 4, high-precision back pressure pump 1-3, counterbalance valve 6, water circulating pump
15th, the 5th unidirectional needle-valve 12-5, the 6th unidirectional needle-valve 12-6, the 7th unidirectional needle-valve 12-7, the 8th unidirectional needle-valve 12-8 and the 9th
Unidirectional needle-valve 12-9；The gas and water separator 4 is water jacket circulation temperature lowering formula device, is surrounded by outside gas and water separator 4 outer
Embedding water jacket realizes the cycling and reutilization of water in water flowing experimentation by external water-bath Xun Huan, gas and water separator 4
Air water import is connected to the exit position of reaction kettle 3 by the 5th unidirectional needle-valve 12-5, in separated flow erosion process
The decomposition gas that generates of water and decomposition of hydrate；15 both ends of water circulating pump are single by the 8th unidirectional needle-valve 12-8 and the 9th
The water outlet of gas and water separator 4 and the entrance of reaction kettle 3 are connected respectively to needle-valve 12-9, realizes the water in experimentation
It recycles；The high-precision back pressure pump 1-3 is connected to the water outlet of gas and water separator 4 by the 6th unidirectional needle-valve 12-6
Mouthful, for controlling the pressure in experimentation in reaction kettle 3 and accessing the production water during water flowing, convenient for calculating；Described
Counterbalance valve 6 is connected to by the 7th unidirectional needle-valve 12-7 at the gas outlet of gas and water separator 4；When progress solid stream of water is dynamic,
High-precision back pressure pump 1-3 and counterbalance valve 6 are adjusted to the pressure in reaction kettle 3, ensure to eliminate temperature and pressure in recovery process
The influence of variation；
The detection and data collecting system include temperature sensors of high precision 11, high-precision inlet pressure sensor 9,
High-precision outlet pressure sensor 14, high-precision gas flowmeter 5, data acquisition module 8 and information gathering preserve system 7；Institute
The high-precision pressure sensor 9 and high-precision outlet pressure sensor 14 stated are connected respectively with sand filter 10, for gathering
Reaction kettle 3 imports and exports the pressure changing at both ends during 3 internal pressure situation of change of reaction kettle and water flowing, obtains
Pressure difference data；The temperature sensors of high precision 11 totally five, along the axis direction of reaction kettle 3 it is equidistant be mounted on reaction kettle
In 3 autoclave body, for gathering the temperature change during hydrate formation and water flowing inside reaction kettle 3；Described
Data acquisition module 8, one end are connected with temperature sensors of high precision 11, and the other end preserves system 7 with information gathering and is connected；It is described
Information gathering preserve system 7 be also connected with counterbalance valve 6；Temperature sensors of high precision 11 and high-precision pressure sensor 9 obtain
Temperature, pressure signal by data acquisition module 8 be transformed into digital signal and preserve be shown in information gathering preserve system 7 in；
The high-precision gas flowmeter 5 is connected between gas and water separator 4 and counterbalance valve 6, passes through the 7th unidirectional needle-valve 12-7
Control gas flow；Before constant stream moves beginning, after opening counterbalance valve 6 and adjusting back pressure, the 7th unidirectional needle-valve 12- is opened
7, it realizes the pressurize during water flowing, and passes through high-precision gas flowmeter 5 and record gas production.
A kind of water erosion method exploitation of gas hydrates experimental simulation method, step are as follows：
(1) check：All valves and pump are closed, and ensure that all devices, pipeline are water-tight air tight；
(2) hydrate generates：By the calculating of preliminary examination hydrate concentration, required water volume and sand body product are obtained, and
By being filled into reaction kettle 3 for glass sand or the uniform consolidation of clay；Open the 3rd unidirectional needle-valve 12-3 and the 4th unidirectional needle-valve
12-4 is uniformly injected into the deionized water of required volume；The first unidirectional needle-valve 12-1 is opened, high-precision gas injection is pumped by source of the gas 2
1-1 carries out gas supplement；After having supplemented, the first unidirectional needle-valve 12-1 is closed, it is single to open the 2nd unidirectional needle-valve 12-2 and the 4th
To needle-valve 12-4, gas is uniformly injected into, the pressure of high-precision gas injection pump 1-1 is set as goal pressure, and is always maintained at constant pressure shape
State；Temperature is kept always by water bath with thermostatic control 13-1 in hydrate formation, and the temperature of water bath with thermostatic control 13-1 is set as mesh
Mark temperature；Temperature, pressure variation in experimentation passes through high-precision inlet pressure sensor 9, high-precision outlet pressure sensor
14 and temperature sensors of high precision 11 come detect record；
(3) backpressure regulation：After the completion of hydrate generation, the 2nd unidirectional unidirectional needle-valve 12- of needle-valve 12-2 and the 4th are closed
4；The pressure of high-precision back pressure pump 1-3 and counterbalance valve 6 are respectively set to object of experiment pressure, after temperature stabilization, opened
5th unidirectional needle-valve 12-5, the 6th unidirectional unidirectional needle-valve 12-7 of needle-valve 12-6 and the 7th；It will be filled in high-precision water injecting pump 1-2
Water, and its pressure is arranged to higher than object of experiment pressure, pass through the water flowing process in pressure difference realization system；
(4) water flowing process：After entire experimental system pressure stability, the 4th unidirectional needle-valve 12-4 is opened, carries out water
Flowing experiment；When 4 water outlet of moisture trap there are flowing out, and entire water flowing process can be maintained there being a certain amount of water
Afterwards, the 4th unidirectional needle-valve 12-4 is closed, opens the unidirectional needle-valve 12-9 of the eight the unidirectional needle-valve 12-8 and the 9th and recirculated water
Pump 15, the circulation rate of recycling water formulation pump 15 realize automatic cycle flowing decomposition experiment；In entire water flowing experimentation
In, temperature, pressure variation passes through high-precision inlet pressure sensor 9, high-precision outlet pressure sensor 14 and high precision temp respectively
Degree sensor 11 records to detect；The decomposition gas and circulating water of water flowing process are separated by gas and water separator 4, water
Decomposition of hydrate gas is recorded by high precision flow 5 caused by flowing, the circulating water of water flowing process by counterbalance valve 6 into
Row is collected and record；
(5) signal acquisition-record-processing：Temperature, pressure signal in whole experiment process passes through 8 turns of gathered data module
Data-signal is turned to, and record and the processing of the progress data of system 7 are preserved by information gathering.
The beneficial effects of the invention are as follows：According to hydrate stability study during water flowing, with reference to decompression extraction system, note
The others hydrate recovery method such as hot extraction system, provides a kind of water erosion method exploitation of gas hydrates experimental simulation side
Method and device.It is used to implement the exploitation of water erosion method hydrate and its experimental study be combineding with each other with other methods.To realize
Efficient, the safe commercialization exploitation of hydrate provides reliable data support and theory analysis.Meanwhile it is hydrated for natural gas
The follow-up study of object recovery method has great importance.
Description of the drawings
Fig. 1 is the schematic diagram of the method and apparatus of the present invention.
In figure：The gas injection of 1-1 high-precisions pumps；1-2 high-precision water injecting pumps；1-3 high-precision back pressure pumps；2 sources of the gas；3 reaction kettles；4
Gas and water separator；5 high-precision gas flowmeters；6 counterbalance valves；7 information gatherings preserve system；8 data acquisition modules；9 is high-precision
Spend inlet pressure sensor；10 sand filters；11 temperature sensors of high precision；The first unidirectional needle-valves of 12-1；12-2 second is single
To needle-valve；The 3rd unidirectional needle-valves of 12-3；The 4th unidirectional needle-valves of 12-4；The 5th unidirectional needle-valves of 12-5；The 6th unidirectional needle-valves of 12-6；
The 7th unidirectional needle-valves of 12-7；The 8th unidirectional needle-valves of 12-8；The 9th unidirectional needle-valves of 12-9；The first waters bath with thermostatic control of 13-1；13-2 second
Water bath with thermostatic control；14 high-precision outlet pressure sensors；15 water circulating pumps.
Specific embodiment
Below in conjunction with technical solution and attached drawing to the specific embodiment that further illustrates the present invention.
As shown in the figure, being connected by the apparatus structure, water erosion method and its and other methods are carried out using the device
Be combined with each other the hydrate extracting experiment of progress.
(1) check：All valves and pump are closed, and ensure that all devices, pipeline are water-tight air tight；
(2) hydrate generates：By the calculating of preliminary examination hydrate concentration, required water volume and sand body product are obtained, and
By being filled into reaction kettle 3 for glass sand or the uniform consolidation of clay；Open the 3rd unidirectional needle-valve 12-3 and the 4th unidirectional needle-valve
12-4 is uniformly injected into the deionized water of required volume；The first unidirectional needle-valve 12-1 is opened, high-precision gas injection is pumped by source of the gas 2
Carry out gas supplement；After having supplemented, the first unidirectional needle-valve 12-1 is closed, opens the 2nd unidirectional needle-valve 12-2 and the 4th unidirectional pin
Valve 12-4, is uniformly injected into gas, sets the pressure of high-precision gas injection pump 1-1 as goal pressure and is always maintained at pressure constant state；Water
It closes temperature in object generating process to be kept by water bath with thermostatic control 13-1 always, and the temperature of water bath with thermostatic control 13-1 is set as target temperature
Degree；Temperature, pressure variation in experimentation passes through high-precision inlet pressure sensor 9,14 and of high-precision outlet pressure sensor
Temperature sensors of high precision 11 records to detect；
(3) backpressure regulation：After the completion of hydrate generation, the 2nd unidirectional unidirectional needle-valve 12- of needle-valve 12-2 and the 4th are closed
4；High-precision back pressure pump 1-3 and 6 pressure of counterbalance valve are respectively set to object of experiment pressure, after temperature stabilization, open the
Five unidirectional needle-valve 12-5, the 6th unidirectional unidirectional needle-valve 12-7 of needle-valve 12-6 and the 7th；It will be filled in high-precision water injecting pump 1-2
Water, and its pressure is arranged to the pressure more slightly higher than experimental pressure, pass through the water flowing process in pressure difference realization system；
(4) water flowing process：After entire experimental system pressure stability, the 4th unidirectional needle-valve 12-4 is opened, carries out water
Flowing experiment；When 4 water outlet of moisture trap there are flowing out, and entire water flowing mistake can be maintained there being a certain amount of water
Cheng Hou closes the 4th unidirectional needle-valve 12-4, opens the unidirectional needle-valve 12-9 of the eight the unidirectional needle-valve 12-8 and the 9th and cycling
Pump 15 adjusts the circulation rate of circulating pump, realizes automatic cycle flowing decomposition experiment；In entire water flowing experimentation, temperature
Pressure change is spent to pass by high-precision inlet pressure sensor 9, high-precision outlet pressure sensor 14 and high-precision temperature respectively
Sensor 11 records to detect；The decomposition gas and circulating water of water flowing process are separated by gas and water separator 4, water flowing
Caused decomposition of hydrate gas is recorded by high precision flow 5, and the circulating water of water flowing process is received by counterbalance valve 6
Collection and record；
(5) signal acquisition-record-processing：Temperature, pressure signal in whole experiment process passes through 8 turns of gathered data module
Data-signal is turned to, and record and the processing of the progress data of system 7 are preserved by information gathering.
Above example is one kind of the specific embodiment of the invention, and those skilled in the art are in the range of the technical program
It is the usual variations and alternatives that carry out, within the scope of the present invention with reference to should all include.
Claims (2)
1. a kind of water erosion method exploitation of gas hydrates experimental simulation device, which is characterized in that including reaction of formation system,
Injected system, separated collection system and detection and four part of data collecting system；
The reaction of formation system includes reaction kettle (3), sand filter (10) and the first water bath with thermostatic control (13-1)；Described
Reaction kettle (3) is placed in the first water bath with thermostatic control (13-1), and reaction kettle (3) carries the cylinder of boss structure for both ends, convenient for reality
The axial flowing of existing hydrate, for the generation of gas hydrates, and then simulates gas hydrates reservoir；The sand
Filter (10) totally two, respectively installation are connected with reaction kettle (3) both ends, prevent the sand during generating process and water flowing
Soil leakage generates blocking to pipeline, influences the measurement of experimental result；First water bath with thermostatic control (13-1) is the life of hydrate
Into the low temperature environment for providing stabilization；
The injected system includes high-precision gas injection pump (1-1), high-precision water injecting pump (1-2), source of the gas (2), the first unidirectional pin
Valve (12-1), the second unidirectional needle-valve (12-2), the 3rd unidirectional needle-valve (12-3), the 4th unidirectional needle-valve (12-4) and the second thermostatted water
It bathes (13-2)；The source of the gas (2) is pumped into high-precision gas injection in (1-1) by the first unidirectional needle-valve (12-1)；The height
Precision gas injection pumps (1-1) and passes through the second unidirectional needle-valve (12-2) and the 3rd unidirectional needle-valve respectively with high-precision water injecting pump (1-2)
(12-3) comes together in the 4th unidirectional needle-valve (12-4), then is connected with the input end of reaction kettle (3)；Hydrate generates required water
It is provided by high-precision water injecting pump (1-2), hydrate generates required methane gas and provided by high-precision gas injection pump (1-1)；Institute
The second water bath with thermostatic control (13-2) stated pumps (1-1) for high-precision gas injection and provides stationary temperature item with high-precision water injecting pump (1-2)
Part；After hydrate has generated, by adjusting the second water bath with thermostatic control (13-2) to change the temperature of high-precision water injecting pump (1-2) interior water
Degree, and continuously injected water in reaction kettle (3) using the pressure x velocity shaping modes of itself are pumped；
The separated collection system includes gas and water separator (4), high-precision back pressure pump (1-3), counterbalance valve (6), recirculated water
Pump (15), the 5th unidirectional needle-valve (12-5), the 6th unidirectional needle-valve (12-6), the 7th unidirectional needle-valve (12-7), the 8th unidirectional needle-valve
(12-8) and the 9th unidirectional needle-valve (12-9)；The gas and water separator (4) is water jacket circulation temperature lowering formula device, in air water point
From outer water jacket is surrounded by outside device (4), realize that the cycling of water in water flowing experimentation is sharp again by external water-bath Xun Huan
With the air water import of gas and water separator (4) is connected to the outlet port of reaction kettle (3) by the 5th unidirectional needle-valve (12-5)
Place, the decomposition gas generated for the water in separated flow erosion process and decomposition of hydrate；Described water circulating pump (15) both ends
By the 8th unidirectional needle-valve (12-8) and the 9th unidirectional needle-valve (12-9) be connected respectively to the water outlet of gas and water separator (4) with
And the entrance of reaction kettle (3), realize the water circulation use in experimentation；The high-precision back pressure pump (1-3) passes through the 6th
Unidirectional needle-valve (12-6) is connected to the water outlet of gas and water separator (4), for controlling the pressure in reaction kettle in experimentation (3)
Power simultaneously accesses the production water during water flowing, convenient for calculating；The counterbalance valve (6) is connected by the 7th unidirectional needle-valve (12-7)
At the gas outlet of gas and water separator (4)；When progress solid stream of water is dynamic, by high-precision back pressure pump (1-3) and counterbalance valve (6)
It adjusts to the pressure in reaction kettle (3), ensures to eliminate the influence of temperature and pressure change in recovery process；
The detection and data collecting system include temperature sensors of high precision (11), high-precision inlet pressure sensor (9),
High-precision outlet pressure sensor (14), high-precision gas flowmeter (5), data acquisition module (8) and information gathering preserve system
It unites (7)；The high-precision pressure sensor (9) and high-precision outlet pressure sensor (14) respectively with sand filter (10)
Connection imports and exports both ends for gathering reaction kettle (3) during reaction kettle (3) internal pressure situation of change and water flowing
Pressure changing obtains pressure difference data；The temperature sensors of high precision (11) totally five, along the axis of reaction kettle (3)
Direction it is equidistant mounted on the autoclave body of reaction kettle (3) in, for gathering reaction during hydrate formation and water flowing
The internal temperature change of kettle (3)；The data acquisition module (8), one end is connected with temperature sensors of high precision (11), another
End preserves system (7) with information gathering and is connected；The information gathering preserves system (7) and is also connected with counterbalance valve (6)；In high precision
The temperature, pressure signal that temperature sensor (11) and high-precision pressure sensor (9) obtain is changed by data acquisition module (8)
It is shown in information gathering into digital signal and preservation and preserves in system (7)；The high-precision gas flowmeter (5) is connected to gas
Between water separation device (4) and counterbalance valve (6), gas flow is controlled by the 7th unidirectional needle-valve (12-7)；It is moved in constant stream
Before beginning, after opening counterbalance valve (6) and adjusting back pressure, the 7th unidirectional needle-valve (12-7) is opened, during realizing water flowing
Pressurize, and pass through high-precision gas flowmeter (5) record gas production.
A kind of 2. water erosion method exploitation of gas hydrates experimental simulation method, which is characterized in that step is as follows：
1) check：All valves and pump are closed, and ensure that all devices, pipeline are water-tight air tight；
2) hydrate generates：By the calculating of preliminary examination hydrate concentration, required water volume and sand body product are obtained, and by glass
Sand or the uniform consolidation of clay are filled into reaction kettle (3)；Open the 3rd unidirectional needle-valve (12-3) and the 4th unidirectional needle-valve
(12-4) is uniformly injected into the deionized water of required volume；The first unidirectional needle-valve (12-1) is opened, by source of the gas (2) to high-precision
Gas injection pump (1-1) carries out gas supplement；After having supplemented, the first unidirectional needle-valve (12-1) is closed, opens the 2nd unidirectional needle-valve
(12-2) and the 4th unidirectional needle-valve (12-4), is uniformly injected into gas, sets the pressure of high-precision gas injection pump (1-1) as target pressure
Power, and it is always maintained at pressure constant state；Temperature is kept always by water bath with thermostatic control (13-1) in hydrate formation, and by thermostatted water
The temperature of bath (13-1) is set as target temperature；Temperature, pressure variation in experimentation passes through high-precision inlet pressure sensor
(9), high-precision outlet pressure sensor (14) and temperature sensors of high precision (11) record to detect；
3) backpressure regulation：After the completion of hydrate generation, the 2nd unidirectional needle-valve (12-2) and the 4th unidirectional needle-valve (12-4) is closed；
The pressure of high-precision back pressure pump (1-3) and counterbalance valve (6) is respectively set to object of experiment pressure, after temperature stabilization, is beaten
Open the 5th unidirectional needle-valve (12-5), the 6th unidirectional needle-valve (12-6) and the 7th unidirectional needle-valve (12-7)；By high-precision water injecting pump
Water is filled in (1-2), and its pressure is arranged to higher than object of experiment pressure, passes through the water flowing mistake in pressure difference realization system
Journey；
4) water flowing process：After entire experimental system pressure stability, the 4th unidirectional needle-valve (12-4) is opened, into surface-water flow
Experiment；When moisture trap (4), water outlet there are flowing out, and can maintain entire water flowing process there being a certain amount of water
Afterwards, close the 4th unidirectional needle-valve (12-4), open the 8th unidirectional needle-valve (12-8) and the 9th unidirectional needle-valve (12-9) and
Water circulating pump (15), the circulation rate of recycling water formulation pump (15) realize automatic cycle flowing decomposition experiment；In entire water flowing
In experimentation, temperature, pressure variation passes through high-precision inlet pressure sensor (9), high-precision outlet pressure sensor respectively
(14) recorded with temperature sensors of high precision (11) to detect；The decomposition gas and circulating water of water flowing process pass through gas-water separation
Device (4) is separated, and decomposition of hydrate gas caused by water flowing is recorded by high precision flow (5), water flowing process
Circulating water be collected and record by counterbalance valve (6)；
5) signal acquisition-record-processing：Temperature, pressure signal in whole experiment process is converted by gathered data module (8)
For data-signal, and record and the processing that system (7) carries out data are preserved by information gathering.
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| CN108661626A (en) * | 2018-08-02 | 2018-10-16 | 西南石油大学 | Borehole wall water enchroachment (invasion) analogue experiment installation under a kind of high temperature and pressure |
| CN109681198A (en) * | 2019-01-25 | 2019-04-26 | 大连理工大学 | A kind of multimode exploitation simulator and method for different type gas hydrates reservoir |
| CN110529100A (en) * | 2019-09-05 | 2019-12-03 | 西南石油大学 | High temperature and pressure pit shaft salt crust physical simulating device and its analogy method |
| CN111827988A (en) * | 2020-07-15 | 2020-10-27 | 大连理工大学 | Visual large-scale expansion well heat-flow-solid coupling natural gas hydrate exploitation experiment simulation device and method |
| CN113252507A (en) * | 2021-04-27 | 2021-08-13 | 青岛海洋地质研究所 | Method for analyzing disturbance and stability of hydrate reservoirs with different burial depths |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108661626A (en) * | 2018-08-02 | 2018-10-16 | 西南石油大学 | Borehole wall water enchroachment (invasion) analogue experiment installation under a kind of high temperature and pressure |
| CN108661626B (en) * | 2018-08-02 | 2023-11-21 | 西南石油大学 | High-temperature high-pressure well wall water invasion simulation experiment device |
| CN109681198A (en) * | 2019-01-25 | 2019-04-26 | 大连理工大学 | A kind of multimode exploitation simulator and method for different type gas hydrates reservoir |
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| CN111827988A (en) * | 2020-07-15 | 2020-10-27 | 大连理工大学 | Visual large-scale expansion well heat-flow-solid coupling natural gas hydrate exploitation experiment simulation device and method |
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| US11441986B1 (en) | 2021-04-27 | 2022-09-13 | Qingdao Institute Of Marine Geology | Disturbance and stability analysis method for hydrate reservoirs with difference buried depths |
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