CN113009109A - Simulation experiment device and method for inducing seabed landslide through natural gas hydrate decomposition - Google Patents
Simulation experiment device and method for inducing seabed landslide through natural gas hydrate decomposition Download PDFInfo
- Publication number
- CN113009109A CN113009109A CN202110168149.0A CN202110168149A CN113009109A CN 113009109 A CN113009109 A CN 113009109A CN 202110168149 A CN202110168149 A CN 202110168149A CN 113009109 A CN113009109 A CN 113009109A
- Authority
- CN
- China
- Prior art keywords
- landslide
- layer
- natural gas
- hydrate
- permeation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 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 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004088 simulation Methods 0.000 title claims abstract description 31
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 28
- 230000001939 inductive effect Effects 0.000 title claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 74
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 239000004927 clay Substances 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004458 analytical method Methods 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 239000013049 sediment Substances 0.000 claims description 42
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000011148 porous material Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001764 infiltration Methods 0.000 claims description 12
- 230000008595 infiltration Effects 0.000 claims description 12
- 230000000007 visual effect Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000002706 hydrostatic effect Effects 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 73
- 238000011160 research Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- -1 natural gas hydrates Chemical class 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
Abstract
The invention provides a simulation experiment device and method for inducing seabed landslide by natural gas hydrate decomposition, relates to the technical field of marine geological disasters and natural gas hydrate exploitation, and realizes dynamic observation of the seabed landslide process. The device comprises a model box body, a gas injection system, a landslide system, an observation system and a data acquisition and analysis system, wherein the model box body provides a test platform and facilitates observation, the gas injection system simulates the process of decomposing and releasing a large amount of methane gas by gas injection of natural gas hydrate, the landslide system is connected with the gas injection system, the landslide system comprises a permeation box, a clay layer and a simulated hydrate layer and is used for simulating the process of seabed landslide, and the observation system records the process of simulating landslide and monitors strain and stress change in the landslide process; the data acquisition and analysis system collects monitoring information of the pressure sensor and the high-speed camera. The simulation test device can observe the dynamic process of inducing the seabed landslide by the hydrate and has the advantages of simple and convenient operation, low cost and the like.
Description
Technical Field
The invention relates to the technical field of marine geological disasters and natural gas hydrate exploitation, in particular to a simulation experiment device and method for inducing seabed landslide by natural gas hydrate decomposition.
Background
With the gradual depletion of traditional fossil fuels such as coal and petroleum, the search for alternative energy sources is an urgent need facing the world. Since the mid-60's of the 20 th century, the soviet union first discovered natural gas hydrates in the stratum, the hydrates enter the sight of people due to the extremely high calorific value of the hydrates, with the continuous and deep research on the exploitation of the natural gas hydrates, a plurality of problems emerge from the water surface, and the decomposition of the natural gas hydrates is considered to be one of the important factors causing the landslide of the seabed. The large-scale seabed landslide not only poses great threat to ocean engineering facilities such as deep sea drilling, submarine tunnels, submarine cables and the like, but also can cause natural disasters such as tsunamis and the like, and seriously threatens normal production and life of people. Therefore, the method has important significance for scientifically guiding the exploitation design of the deep-sea natural gas hydrate by recognizing the occurrence mechanism and the development process of the sea bottom landslide.
The seabed landslide is that methane gas far larger than the self volume is released when the natural gas hydrate is decomposed, along with the process, the gas volume is increased and cannot be discharged, the ultra-pore pressure is generated, and when the ultra-pore pressure is accumulated to a certain degree, and the shearing resistance in the stratum is smaller than the shearing force, the seabed landslide or the seabed landslide can be generated. At present, the research aiming at the aspect mostly takes qualitative research as a main part, and in the aspect of quantitative research, theoretical calculation and numerical simulation depend on the understanding degree of soil body properties to a great extent, and the development process of the submarine landslide is difficult to simulate. Although physical simulation is a reliable research means, the state of the hydrate can be maintained only under the conditions of low temperature and high pressure, the existing simulation experiment device is difficult to realize synthesis and decomposition of the hydrate in the experiment process, the phenomenon that the natural gas hydrate generates excessive pore pressure after decomposition and lift force further causes landslide cannot be simulated, and the application has limitation. Therefore, a simulation experiment device for inducing the seabed landslide by natural gas hydrate decomposition and a using method thereof are needed, and the simulation experiment device can provide reference and guidance for the exploitation design of the deep-sea natural gas hydrate and reduce or even eliminate the possibility of inducing the seabed landslide by reproducing the landslide occurrence process and monitoring and analyzing information such as deformation stress and the like.
Disclosure of Invention
The invention provides a simulation experiment device and a simulation experiment method for inducing seabed landslide by natural gas hydrate decomposition, aiming at realizing simulation of the process of inducing seabed landslide by hydrate decomposition and dynamically observing the change of strain and pressure in the landslide process.
A simulation experiment device for inducing seabed landslide by natural gas hydrate decomposition comprises a model box body, a gas injection system, a landslide system, an observation system and a data acquisition and analysis system; the bottom of the model box body is provided with support legs, each side surface is provided with a visible window, the upper surface of the model box body is provided with a gas channel, the gas channel is connected with a first air compressor, and the gas channel is provided with a flow regulating valve and a pressure gauge; the gas injection system is connected with the model box body and the landslide system and comprises a second air compressor, a gas flowmeter, a gas pipeline and a flow regulating valve, the air compressor is connected with the plurality of permeation boxes through the gas pipeline, and the gas flowmeter and the flow regulating valve are arranged on the gas pipeline; the landslide system is configured in the model box body and comprises a permeation box, a clay layer, a sediment layer and a hydrate layer, wherein the first sediment layer, the first clay layer, the permeation box, the hydrate layer, the second clay layer and the second sediment layer are sequentially arranged in the model box body in an inclined mode; the observation system comprises a high-speed camera and a plurality of pressure sensors, and the hydrate layer and the second sediment layer are provided with the plurality of pressure sensors; the data acquisition and analysis system collects monitoring information of the pressure sensor and the high-speed camera and calculates stress and strain in the landslide process.
Preferably, the visual window of the model box body is made of an acrylic glass plate, and the visual window is provided with coordinate scales.
Preferably, the first air compressor simulates the hydrostatic pressure of seawater, and the second air compressor simulates the methane gas generated by the decomposition of natural gas hydrate, and simulates the relationship between the generation of the supercavity pressure and landslide at each position.
Preferably, the gas pipeline is connected with the model box body through a flange, the permeation boxes have three specifications, and the permeation capacities of the three permeation boxes are respectively 0.30m3/(h. Box), 0.25m3V (h box) and 0.20m3V (h box).
Preferably, the infiltration box is made of steel plates, a support is arranged in the infiltration box, and a breathable material is fixed on the support; the bottom of the permeation box is provided with an air hole which is connected with a branch pipe of the gas pipeline.
It is also preferred that the hydrate layer comprises silica sand and water, and the second sediment layer is covered with water.
A simulation experiment method for inducing the seabed landslide by the natural gas hydrate decomposition utilizes the simulation experiment device for inducing the seabed landslide by the natural gas hydrate decomposition, and comprises the following steps:
s1, determining the gradient of a simulated natural gas hydrate, and sequentially arranging a first sediment layer and a first clay layer in a model box body according to the gradient;
s2, arranging infiltration boxes above the first clay layer, wherein the infiltration boxes are arranged in a sequence that infiltration capacity is reduced from the middle to two sides in sequence;
s3, arranging a natural gas hydrate layer above the permeation box according to the gradient, arranging a second clay layer above the natural gas hydrate layer, arranging a pressure sensor, arranging a second sediment layer above the second clay layer, and spraying speckles on the second sediment layer;
s4, filling water above the second sediment layer, enabling the water surface to sink the second sediment layer, opening a first air compressor, adjusting a flow adjusting valve on the air channel, and keeping the hydrostatic pressure in the model box body stable;
s5, monitoring the strain displacement and the pressure change of the second sediment layer by the observation system and the data acquisition and analysis system;
s6, starting a second air compressor, and adjusting a flow regulating valve on a gas pipeline according to monitoring data;
s7, repeating the steps S1-S6, wherein the gradient of the simulated natural gas hydrate and the gas flow introduced by the gas pipeline are adjusted, a plurality of groups of tests are carried out, and the data acquisition and analysis system records monitoring data.
It is further preferred that the monitoring data include monitoring data of a pressure sensor, and the flow regulating valve on the gas pipeline is adjusted according to the monitoring data of the pressure sensor, so that the pore pressure at the middle position of the permeable box layer is kept to be maximum, and the pore pressure is reduced from the middle to two sides in sequence.
The simulation experiment device and the simulation experiment method for inducing the seabed landslide by the natural gas hydrate decomposition have the advantages that the process of the seabed landslide caused by the fact that the hydrate reservoir layer generates the ultra-pore pressure due to the fact that the natural gas hydrate cannot be discharged because the methane gas which is far larger than the self volume is released can be simulated by the mutual matching of the model box body, the gas injection system and the landslide system; in addition, the observation system and the data acquisition and analysis system are matched with each other, the whole process monitoring of simulating the submarine landslide is realized, and the monitoring result can be used for researching the problem of the submarine landslide caused by combustible ice mining. In addition, the test device and the method have the advantages of simple operation, low cost, visual simulation of the geometric form and the denaturation characteristic of the landslide and the like.
Drawings
FIG. 1 is a schematic structural diagram of a simulation experiment device for inducing seabed landslide by natural gas hydrate decomposition;
FIG. 2 is a schematic diagram of a simulated seafloor landslide;
FIG. 3 is a schematic view of the arrangement of the permeation cartridge;
in the figure: 1. the device comprises a model box body, 2, a first sediment layer, 3, a first clay layer, 4, a hydrate layer, 5, a pressure sensor, 6, a permeation box, 7, a second clay layer, 8, a flow regulating valve, 9, a second sediment layer, 10, a high-speed camera, 11, a gas pipeline, 12, a gas flowmeter, 13, a second air compressor, 14, a first air compressor, 15, a computer, 16, a pressure gauge, 17, a gas channel, 18, a flow regulating valve, 19, water, 20, a wire groove and 21 debris flow.
Detailed Description
The present invention provides a simulation experiment apparatus and method for inducing a sea-bottom landslide by decomposing natural gas hydrate, which is described with reference to fig. 1 to 3.
A simulation experiment device for inducing seabed landslide by natural gas hydrate decomposition comprises a model box body, a gas injection system, a landslide system, an observation system and a data acquisition and analysis system; the process of the seabed landslide caused by the fact that a hydrate reservoir layer generates the super-pore pressure due to the fact that the methane gas which is far larger than the self volume of the natural gas hydrate can not be discharged is released through the mutual matching of the model box body, the gas injection system and the landslide system; in addition, the observation system and the data acquisition and analysis system are matched with each other, the whole process monitoring of simulating the submarine landslide is realized, and the monitoring result can be used for researching the problem of the submarine landslide caused by combustible ice mining.
Wherein, the bottom of the model box body 1 is provided with a supporting leg, and each side surface is provided with a visual window. The visible window is made of transparent material so as to facilitate observation, and the size of the visible window is generally larger than 180cm × 60cm × 90 cm. The visual window of the model box body is made of an acrylic glass plate, and the visual window is provided with coordinate scales for accurate deformation positioning analysis. The upper surface of the model box body 1 is provided with a gas channel 17, the gas channel 17 is connected with a first air compressor 14, the first air compressor 14 injects gas into the model box body 1, so that a high pressure area can be formed in the upper space of the model box body 1, the static pressure of water in the model box body 1 is positioned, the gas channel 17 is provided with a flow regulating valve 18 and a pressure gauge 16, and the air pressure in the model box body is controlled according to the pressure gauge 16 and the flow regulating valve 18.
The gas injection system links to each other with model box 1, landslide system, and the gas injection system includes second air compressor machine 13, gas flowmeter 12, gas pipeline 11 and flow control valve 13, and second air compressor machine 13 passes through gas pipeline and a plurality of infiltration boxes link to each other, is provided with gas flowmeter and flow control valve on the gas pipeline 11. The first air compressor 14 simulates the hydrostatic pressure of seawater, the second air compressor 13 simulates methane gas generated by decomposing natural gas hydrate, and the relation between the generation of the super-pore pressure of each position and landslide is simulated. The control of the air output of each permeation box can be realized by controlling the flow regulating valve 18, and the influence on landslide when the super-gap pressure at different positions is generated is simulated.
The landslide system is configured in the model box body and comprises a penetration box, a clay layer, a sediment layer and a hydrate layer, wherein a first sediment layer 2, a first clay layer 3, a penetration box 6, a hydrate layer 4, a second clay layer 7 and a second sediment layer 9 are sequentially arranged in the model box body 1 in an inclined mode, the hydrate layer 4 comprises quartz sand and water, and the upper portion of the second sediment layer is covered by water 19. The gas pipeline 11 is connected with the model box body 1 through a flange, the permeation boxes 6 have three specifications, and the permeation capacities of the three permeation boxes 6 are respectively 0.30m3/(h. Box), 0.25m3V (h box) and 0.20m3V (h. box), each permeation box permeated 0.30m of gas per hour3，0.25m3，0.20m3(ii) a The dimensions of each permeation cartridge were 30cm × 15cm × 4 cm. The infiltration box 6 is made of a steel plate with the thickness of 1.2mm, a bracket with the height of 1cm is arranged in the infiltration box 6, and a breathable material which can be a foam material or a plastic material with a porous structure is fixed on the bracket. The bottom of the permeation box 6 is provided with an air hole, the air hole is connected with a branch pipe of a gas pipeline, and each branch pipe is provided with a flow regulating valve 8, so that accurate control of gas outlet of the permeation box can be realized.
The observation system comprises a high-speed camera 10 and a plurality of pressure sensors 5, wherein the high-speed camera 10 is placed on the front surface of the box body, is used for observing the displacement change of the sediment layer and recording the deformation characteristics of the whole landslide process. The hydrate layer 4 and the second sediment layer 9 are arranged with a plurality of pressure sensors 5; wherein, a row of pressure sensors 5 can be arranged on the infiltration box layer, a row of pressure sensors is embedded in the hydrate layer 4, a plurality of pressure sensors are also embedded in the second sediment layer 9, and the lead of the pressure sensors 5 is led out through a wire casing 20 on the model box body. The data acquisition and analysis system collects monitoring information of the pressure sensor and the high-speed camera and calculates stress and strain in the landslide process; therefore, the deformation of the hydrate layer and the overlying sediment layer and the landslide migration path can be conveniently researched when the seabed landslide occurs.
A simulation experiment method for inducing the seabed landslide by the natural gas hydrate decomposition utilizes the simulation experiment device for inducing the seabed landslide by the natural gas hydrate decomposition, and comprises the following steps:
s1, determining the gradient of a simulated natural gas hydrate, and sequentially arranging a first sediment layer and a first clay layer in a model box body according to the gradient; the first sediment layer is arranged at the bottom of the model box body, the inclination angle and the gradient of the upper surface of the first sediment layer are the same, and the clay layer is made of geotechnical materials with higher density. The layers of the landslide system and the two layers of deposit-like simulant material are bonded using a suitable interlayer adhesive.
S2, arranging permeation boxes above the first clay layer, wherein the permeation boxes are arranged in a sequence that the permeation capacity is reduced from the middle to two sides in sequence. The first permeation box placed at the middle position has the permeation capacity of 0.30m3V (h box), simulating the wellhead position, third permeation box placed at the two outermost positions with the permeation capacity of 0.20m3V (h. box), the remaining place was set to have a second permeation box permeation capacity of 0.25m3V (h box).
S3, a natural gas hydrate layer is arranged above the permeation box according to the gradient, a second clay layer is arranged above the natural gas hydrate layer, the pressure sensor is arranged, a second sediment layer is arranged above the second clay layer, and speckles are sprayed on the second sediment layer, so that the high-speed camera is used for measurement in the later period conveniently.
And S4, filling water above the second sediment layer, enabling the water surface to sink the second sediment layer and be higher than the highest point of the sediment layer by a certain height, opening a first air compressor, adjusting a flow adjusting valve on the gas channel, and keeping the hydrostatic pressure in the model box body stable, so that the real seabed environment is simulated.
And S5, monitoring the strain displacement and the pressure change of the second sediment layer by the observation system and the data acquisition and analysis system. The observation system records the strain displacement and the real-time pressure of the sediment simulation material layer coated on the model box body in real time, and records the stress and the displacement change in the whole experiment process.
S6, starting a second air compressor, and adjusting a flow regulating valve on a gas pipeline according to monitoring data; the gas far greater than the natural gas hydrate layer is released through the permeation box, methane gas released by hydrate decomposition is simulated, gas leakage is prevented by clay layers arranged above and below the hydrate layer, when the gas volume is increased and cannot be leaked out, ultra-pore pressure is generated, after the ultra-pore pressure is accumulated to a certain degree, the shearing resistance in the stratum is smaller than the shearing force, and collapse or seabed landslide is easily caused at the moment.
S7, repeating the steps S1-S6, wherein the gradient of the simulated natural gas hydrate and the gas flow introduced by the gas pipeline are adjusted, a plurality of groups of tests are carried out, and the data acquisition and analysis system records monitoring data. The monitoring data comprises monitoring data of a pressure sensor, a flow regulating valve on a gas pipeline is adjusted according to the monitoring data of the pressure sensor, the maximum pore pressure at the middle position of the permeation box layer is kept, and the pore pressure is sequentially reduced from the middle to two sides.
And performing a plurality of groups of tests, and analyzing the mechanism and the process of inducing the seabed landslide by decomposing the natural gas hydrate according to the stress and strain displacement data obtained by the computer acquisition system, thereby providing guidance for the exploitation design of the natural gas hydrate.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A simulation experiment device for inducing seabed landslide by natural gas hydrate decomposition is characterized by comprising a model box body, a gas injection system, a landslide system, an observation system and a data acquisition and analysis system;
the bottom of the model box body is provided with support legs, each side surface is provided with a visible window, the upper surface of the model box body is provided with a gas channel, the gas channel is connected with a first air compressor, and the gas channel is provided with a flow regulating valve and a pressure gauge; the gas injection system is connected with the model box body and the landslide system and comprises a second air compressor, a gas flowmeter, a gas pipeline and a flow regulating valve, the air compressor is connected with the plurality of permeation boxes through the gas pipeline, and the gas flowmeter and the flow regulating valve are arranged on the gas pipeline; the landslide system is configured in the model box body and comprises a permeation box, a clay layer, a sediment layer and a hydrate layer, wherein the first sediment layer, the first clay layer, the permeation box, the hydrate layer, the second clay layer and the second sediment layer are sequentially arranged in the model box body in an inclined mode; the observation system comprises a high-speed camera and a plurality of pressure sensors, and the hydrate layer and the second sediment layer are provided with the plurality of pressure sensors; the data acquisition and analysis system collects monitoring information of the pressure sensor and the high-speed camera and calculates stress and strain in the landslide process.
2. The experimental simulation apparatus for inducing the seabed landslide through the natural gas hydrate decomposition according to claim 1, wherein a visual window of the model box body is made of an acrylic glass plate, and coordinate scales are arranged on the visual window.
3. The experimental device for simulating the sea bottom landslide induced by the decomposition of the natural gas hydrate as claimed in claim 1, wherein the first air compressor simulates the hydrostatic pressure of seawater, the second air compressor simulates methane gas generated by the decomposition of the natural gas hydrate, and the relation between the generation of the excess pore pressure and the landslide at each position is simulated.
4. The simulation experiment device for inducing seabed landslide through natural gas hydrate decomposition according to claim 3, wherein the gas pipeline is connected with the model box body through a flange, the permeation boxes have three specifications, and the permeation capacities of the three permeation boxes are respectively 0.30m3/(h. Box), 0.25m3V (h box) and 0.20m3V (h box).
5. The simulation experiment device for inducing the seabed landslide through the natural gas hydrate decomposition according to claim 4, wherein the permeation box is made of a steel plate, a support is arranged in the permeation box, and a breathable material is fixed on the support; the bottom of the permeation box is provided with an air hole which is connected with a branch pipe of the gas pipeline.
6. The simulated experimental device for inducing seafloor landslide of claim 4, wherein the hydrate layer comprises quartz sand and water, and the second sediment layer is covered by water.
7. A simulation experiment method for inducing the seabed landslide through natural gas hydrate decomposition, which is characterized in that the simulation experiment device for inducing the seabed landslide through natural gas hydrate decomposition according to any one of claims 1 to 6 is utilized, and the steps comprise:
s1, determining the gradient of a simulated natural gas hydrate, and sequentially arranging a first sediment layer and a first clay layer in a model box body according to the gradient;
s2, arranging infiltration boxes above the first clay layer, wherein the infiltration boxes are arranged in a sequence that infiltration capacity is reduced from the middle to two sides in sequence;
s3, arranging a natural gas hydrate layer above the permeation box according to the gradient, arranging a second clay layer above the natural gas hydrate layer, arranging a pressure sensor, arranging a second sediment layer above the second clay layer, and spraying speckles on the second sediment layer;
s4, filling water above the second sediment layer, enabling the water surface to sink the second sediment layer, opening a first air compressor, adjusting a flow adjusting valve on the air channel, and keeping the hydrostatic pressure in the model box body stable;
s5, monitoring the strain displacement and the pressure change of the second sediment layer by the observation system and the data acquisition and analysis system;
s6, starting a second air compressor, and adjusting a flow regulating valve on a gas pipeline according to monitoring data;
s7, repeating the steps S1-S6, wherein the gradient of the simulated natural gas hydrate and the gas flow introduced by the gas pipeline are adjusted, a plurality of groups of tests are carried out, and the data acquisition and analysis system records monitoring data.
8. The method as claimed in claim 7, wherein the monitoring data includes monitoring data of a pressure sensor, the flow regulating valve on the gas pipeline is adjusted according to the monitoring data of the pressure sensor, the pore pressure at the middle position of the permeation box layer is kept to be maximum, and the pore pressure is reduced from the middle to two sides in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168149.0A CN113009109B (en) | 2021-02-07 | 2021-02-07 | Simulation experiment device and method for inducing submarine landslide through natural gas hydrate decomposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168149.0A CN113009109B (en) | 2021-02-07 | 2021-02-07 | Simulation experiment device and method for inducing submarine landslide through natural gas hydrate decomposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113009109A true CN113009109A (en) | 2021-06-22 |
| CN113009109B CN113009109B (en) | 2024-02-23 |
Family
ID=76384433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110168149.0A Active CN113009109B (en) | 2021-02-07 | 2021-02-07 | Simulation experiment device and method for inducing submarine landslide through natural gas hydrate decomposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113009109B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958292A (en) * | 2021-11-25 | 2022-01-21 | 山东科技大学 | Simulation test device for combustible ice mining stratum instability mechanism and use method thereof |
| CN114323558A (en) * | 2021-12-29 | 2022-04-12 | 中山大学 | Integrated test simulation device and simulation method for water disasters in river estuary zone |
| CN114878789A (en) * | 2022-07-13 | 2022-08-09 | 成都理工大学 | Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis |
| CN117419943A (en) * | 2023-12-19 | 2024-01-19 | 武汉理工大学三亚科教创新园 | Ocean underground space model test device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206146927U (en) * | 2016-11-10 | 2017-05-03 | 西南石油大学 | Decomposition of simulation gas hydrate causes submarine landslide experimental apparatus |
| CN107589235A (en) * | 2017-07-14 | 2018-01-16 | 华侨大学 | A kind of gas hydrate dissociation induces the simulation test device of submarine landslide |
| CN108318633A (en) * | 2018-02-08 | 2018-07-24 | 中国石油大学(华东) | A kind of seabed exploit induced disaster experimental simulation research device and experimental method without overlying densification cap rock hydrate |
| CN108614090A (en) * | 2018-05-17 | 2018-10-02 | 同济大学 | Simulate the experimental rig that gas hydrate dissociation induces seabed slope instability |
| CN109386283A (en) * | 2018-09-21 | 2019-02-26 | 北京大学 | A kind of experimental provision causing submarine landslide suitable for simulating combustible ice exploitation |
| CN111443167A (en) * | 2020-04-07 | 2020-07-24 | 吉林大学 | Method and device for testing influence of natural gas hydrate decomposition on seabed slope |
-
2021
- 2021-02-07 CN CN202110168149.0A patent/CN113009109B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206146927U (en) * | 2016-11-10 | 2017-05-03 | 西南石油大学 | Decomposition of simulation gas hydrate causes submarine landslide experimental apparatus |
| CN107589235A (en) * | 2017-07-14 | 2018-01-16 | 华侨大学 | A kind of gas hydrate dissociation induces the simulation test device of submarine landslide |
| CN108318633A (en) * | 2018-02-08 | 2018-07-24 | 中国石油大学(华东) | A kind of seabed exploit induced disaster experimental simulation research device and experimental method without overlying densification cap rock hydrate |
| CN108614090A (en) * | 2018-05-17 | 2018-10-02 | 同济大学 | Simulate the experimental rig that gas hydrate dissociation induces seabed slope instability |
| CN109386283A (en) * | 2018-09-21 | 2019-02-26 | 北京大学 | A kind of experimental provision causing submarine landslide suitable for simulating combustible ice exploitation |
| CN111443167A (en) * | 2020-04-07 | 2020-07-24 | 吉林大学 | Method and device for testing influence of natural gas hydrate decomposition on seabed slope |
Non-Patent Citations (1)
| Title |
|---|
| 孙立娟 等: "牵引式滑坡渐进形成历程试验研究", 《西南交通大学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958292A (en) * | 2021-11-25 | 2022-01-21 | 山东科技大学 | Simulation test device for combustible ice mining stratum instability mechanism and use method thereof |
| CN113958292B (en) * | 2021-11-25 | 2024-03-01 | 山东科技大学 | Combustible ice exploitation stratum instability mechanism simulation test device and application method thereof |
| CN114323558A (en) * | 2021-12-29 | 2022-04-12 | 中山大学 | Integrated test simulation device and simulation method for water disasters in river estuary zone |
| CN114323558B (en) * | 2021-12-29 | 2023-11-03 | 中山大学 | River estuary water disaster integrated test simulation device and simulation method thereof |
| CN114878789A (en) * | 2022-07-13 | 2022-08-09 | 成都理工大学 | Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis |
| CN117419943A (en) * | 2023-12-19 | 2024-01-19 | 武汉理工大学三亚科教创新园 | Ocean underground space model test device and method |
| CN117419943B (en) * | 2023-12-19 | 2024-04-05 | 武汉理工大学三亚科教创新园 | Ocean underground space model test device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113009109B (en) | 2024-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113009109B (en) | Simulation experiment device and method for inducing submarine landslide through natural gas hydrate decomposition | |
| Bünz et al. | Geological controls on the Storegga gas-hydrate system of the mid-Norwegian continental margin | |
| Tobin et al. | NanTroSEIZE: the IODP Nankai Trough seismogenic zone experiment | |
| CN108198498A (en) | Earthquake-tide effect lower simulator and analogy method of the inshore with seepage action of ground water | |
| CN101697018B (en) | Method for simulating hydrate decomposition to cause layered fracture of stratum | |
| CN111551672B (en) | Natural gas hydrate exploitation methane leakage simulation system and method | |
| Anthonsen et al. | Characterisation and selection of the most prospective CO2 storage sites in the Nordic region | |
| Moore et al. | Negative‐polarity seismic reflections along faults of the Oregon accretionary prism: Indicators of overpressuring | |
| CN105675846A (en) | Foundation pit excavation model testing device capable of cooperatively hoisting phreatic water level and pressure-bearing water head | |
| Osmond et al. | Structural traps and seals for expanding CO2 storage in the northern Horda platform, North Sea | |
| T Camargo et al. | Deformation monitoring feasibility for offshore carbon storage in the Gulf-of-Mexico | |
| Hemmings-Sykes | The influence of faulting on hydrocarbon migration in the Kupe area, south Taranaki Basin, New Zealand | |
| Powars et al. | Stafford fault system: 120 million year fault movement history of northern Virginia | |
| Van der Meer et al. | CO2 storage and testing enhanced gas recovery in the K12-B reservoir | |
| Tentler et al. | Magmatic fissures and their systems in Iceland: A tectonomagmatic model | |
| Wesson et al. | Challenges in making a seismic hazard map for Alaska and the Aleutians | |
| Young | Feasibility of Time-lapse Gravity Monitoring of Gas Production and CO2 Sequestrartion, Northern Carnarvon Basin, Australia | |
| Aoki | Storage of LPG in Large Rock Caverns | |
| Tanase et al. | The post-injection phase of the Tomakomai CCS Demonstration Project | |
| Van der Meer et al. | K12-B: Carbon dioxide injection in a nearly depleted gas field offshore the Netherlands | |
| Kempka et al. | Seismic chimney formation induced by upward-migrating methane in the Nordland Group, Southern Viking Graben | |
| Agibalov | Faults in the Quaternary deposits of the Northern Lake Ladoga Region as indicators of seismotectonic processes | |
| Akhmetova | Thermodynamics and fluid flow models for CO2 flow assurance | |
| Vadakkepuliyambatta | Sub-seabed fluid-flow systems and gas hydrates of the SW Barents Sea and North Sea margins | |
| Okoroafor et al. | Underground Hydrogen Storage in Porous Media: The Role of Petrophysics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |