CN113445966B - Ocean natural gas hydrate exploitation analogue means - Google Patents
Ocean natural gas hydrate exploitation analogue means Download PDFInfo
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- CN113445966B CN113445966B CN202110881765.0A CN202110881765A CN113445966B CN 113445966 B CN113445966 B CN 113445966B CN 202110881765 A CN202110881765 A CN 202110881765A CN 113445966 B CN113445966 B CN 113445966B
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- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 30
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000003345 natural gas Substances 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 18
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 9
- 239000013535 sea water Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000013043 chemical agent Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to an ocean natural gas hydrate exploitation simulation device, which comprises a distribution tank 1, an exhaust pipe 2, a mixed delivery pump 5, a separation tank 7, a liquid level device 8, a drain pipe 9, a drain pump 10, a booster pump 14 and a natural gas tank 12, wherein the bottom end of the distribution tank 1 is connected with the exhaust pipe 2, the exhaust pipes are L-shaped and distributed in an annular array around the distribution tank, a natural gas sensor 4 and a butterfly valve 3 are arranged at the top end of each exhaust pipe, the top end of the distribution tank is connected with the mixed delivery pump 5 through a mixed pipeline 6, and a discharge port of the mixed delivery pump is connected with the separation tank 7 through a feed pipeline 11; the separating tank is provided with a liquid level device 8, a sensing part of the liquid level device vertically extends into the separating tank, the bottom end of the separating tank is provided with a sewage discharge pipe 9 and a sewage discharge pump 10, the top end of the separating tank is connected with an air inlet of a booster pump 14 through a gas transmission pipeline 13, and an output port of the booster pump is communicated with a natural gas tank 12. The invention has reliable principle and simple and convenient operation, and provides technical conditions for further and deeply researching the effective exploitation of the natural gas hydrate.
Description
Technical Field
The invention relates to the field of marine natural gas hydrate exploitation, in particular to a marine natural gas hydrate exploitation simulation device.
Background
The natural gas hydrate is called as combustible ice because the appearance of the natural gas hydrate is similar to the crystal form of ice, the natural gas hydrate has huge storage capacity in the world, and combustion emissions are cleaner than petroleum, coal and the like, but the natural gas hydrate is formed under harsh conditions under natural conditions, high pressure, low temperature and water are needed in the environment, and the natural gas hydrate can be formed only by decomposing organic matters with strains such as oxygen, anaerobic bacteria and the like, so the natural gas hydrate mostly exists in a muddy shallow seabed, wherein the natural gas hydrate ore bed distribution characteristic of the seabed is wide in area and thin in thickness, so the mining efficiency of the traditional shaft mining mode is low, and the natural gas hydrate distribution characteristic is ignored mostly when the natural gas hydrate mining is simulated by using high-pressure containers, sand, water, related injection, heating and other systems in a laboratory, resulting in experimental mining results that differ significantly from actual mining.
Disclosure of Invention
The invention aims to provide a marine natural gas hydrate exploitation simulation device which is reliable in principle and simple and convenient to operate, solves the problem that the existing natural gas hydrate exploitation simulation equipment structure is not suitable for the natural gas hydrate distribution characteristics in the natural environment, and is beneficial to further and deeply researching the effective exploitation of the natural gas hydrate.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
The utility model provides an ocean gas hydrate exploitation analogue means, includes gathers mechanism, filtering mechanism and gas storage mechanism, gather the mechanism and be connected with filtering mechanism through charge-in pipeline, filtering mechanism is connected with gas storage mechanism through gas transmission pipeline.
The collecting mechanism comprises a distribution tank, an exhaust pipe and a mixed delivery pump, the top end of the exhaust pipe is connected with the distribution tank, the exhaust pipe is distributed in an annular array mode relative to the distribution tank, the mixed delivery pump is located at the top end of the distribution tank, and the mixed delivery pump is connected with the distribution tank through a mixed pipeline.
The filtering mechanism comprises a separation tank, a feeding pipeline is arranged between a discharge port of the mixing and conveying pump and the separation tank, a liquid level device is arranged at the top end of the separation tank, a sensing part of the liquid level device vertically extends into the separation tank, and a drain pipe is arranged at the bottom end of the separation tank.
The gas storage mechanism comprises a booster pump and a natural gas tank, a gas transmission pipeline is arranged between the gas inlet of the booster pump and the top end of the separation tank, and the output port of the booster pump is communicated with the natural gas tank.
Preferably, the bottom of bleed-off line is the setting of L type, just bleed-off line's bottom is radial distribution, bleed-off line's top is established ties there are natural gas sensor and automatically controlled butterfly valve, and natural gas sensor detects the natural gas content of extraction, and the butterfly valve is used for controlling every bleed-off line's flow.
Preferably, the bottom end of the air exhaust pipeline is provided with pores, and the pores are uniformly distributed about the horizontal section of the air exhaust pipeline.
Preferably, the booster pump is connected with the natural gas tank in series through a one-way valve.
Preferably, the feed pipeline is connected with the middle part of the separation tank, and the bottom end of the floating ball stroke of the liquid level device is positioned at the feed pipeline.
Preferably, the tail end of the sewage discharge pipe is provided with a sewage discharge pump, and the top of the mixing delivery pump is connected with a chemical reagent filling pipeline.
Compared with the prior art, the invention has the following beneficial effects:
1. the device has increased the exploitation regional area of exploitation device through the exhaust tube that is radial setting to detect the natural gas content in the exhaust duct through natural gas sensor, when content reduces gradually to no exploitation value, automatically controlled butterfly valve closes little until closing completely gradually, can realize effective regulation and control, prevents to take into impurity such as silt water that does not contain the natural gas, increases exploitation efficiency, prevents the loss.
2. The device utilizes water and impurity to subside through filtering mechanism, and gas come-up separates gas, water, solid to through the level gauge real-time supervision liquid level, carry out liquid level control through the dredge pump, make the disengaging process can continuously go on safely.
Drawings
Fig. 1 is a schematic structural diagram of a marine natural gas hydrate exploitation simulation device.
Fig. 2 is a structural sectional view of the separation tank.
Fig. 3 is an enlarged view of a portion a of fig. 1.
Reference numbers in the figures: 1. a distribution tank; 2. an exhaust pipe; 3. an electric control butterfly valve; 4. a natural gas sensor; 5. a mixing delivery pump; 6. a mixing duct; 7. a separation tank; 8. a liquid level gauge; 9. a blow-off pipe; 10. a sewage pump; 11. a feed conduit; 12. a natural gas tank; 13. a gas pipeline; 14. a booster pump; 15. a one-way valve; 16. a void; 17. and a chemical reagent filling pipeline.
Detailed Description
The present invention is further described below with reference to the accompanying drawings so as to facilitate understanding of the present invention by those skilled in the art. It is to be understood that the invention is not limited in scope to the specific embodiments, but is intended to cover various modifications within the spirit and scope of the invention as defined and defined by the appended claims, as would be apparent to one of ordinary skill in the art.
See fig. 1, 2, 3.
An ocean natural gas hydrate exploitation simulation device comprises a distribution tank 1, an extraction pipe 2, a mixed delivery pump 5, a separation tank 7, a liquid level device 8, a drain pipe 9, a drain pump 10, a booster pump 14 and a natural gas tank 12.
The bottom end of the distribution tank 1 is connected with an air pumping pipe 2, the air pumping pipes are L-shaped and distributed in an annular array around the distribution tank, the top end of each air pumping pipe is provided with a natural gas sensor 4 and an electric control butterfly valve 3, the top end of the distribution tank is connected with a mixing delivery pump 5 through a mixing pipeline 6, and the discharge port of the mixing delivery pump is connected with a separation tank 7 through a feed pipeline 11; the knockout drum sets up level gauge 8, and the sensing part of level gauge is vertical to extend to in the knockout drum, and the knockout drum bottom sets up blow off pipe 9 and dredge pump 10, and the knockout drum top is through gas transmission pipeline 13 connection booster pump 14's air inlet, and the delivery outlet and the natural gas jar 12 intercommunication of booster pump.
The bottom end of the exhaust tube 2 is provided with holes 16 which are uniformly distributed on the horizontal section of the exhaust tube, so that the effective air exhaust area of the exhaust tube is increased.
A check valve 15 is arranged between the booster pump 14 and the natural gas tank 12 to prevent gas leakage.
The feed pipeline 11 is connected with the middle part of the separation tank 7, the bottom end of the floating ball stroke of the liquid level device 8 is positioned at the feed pipeline, so that liquid and impurities sink, and gas floats upwards to enter the gas transmission pipeline 13 in enough time.
The top of the mixed delivery pump 5 is connected with a chemical reagent filling pipeline 17 for filling hot seawater or chemical reagents, and the balance condition of natural gas hydrate storage is broken through thermal excitation by taking the hot seawater or chemical reagents as a medium, so that the natural gas hydrate is decomposed in a reservoir and then enters the extraction pipe 2, and the condition that solid hydrates cannot be extracted is avoided.
The working principle of the invention is as follows:
the pressing device enables the air exhaust pipe 2 to be buried in the soft muddy ocean, the top of the mixing delivery pump is connected with a chemical reagent filling pipeline 17, hot seawater or chemical reagents are filled in the chemical reagent filling pipeline 17 to enable the marine natural gas hydrate to be decomposed, the situation that the solid hydrate cannot be extracted is avoided, negative pressure is generated through the mixing delivery pump 5, the mixing pipeline 6, the distribution tank 1 and the air exhaust pipe 2 generate negative pressure to simulate exploitation and air exhaust, the extracted natural gas certainly contains impurities such as water, gravel and the like, the natural gas content in the air exhaust pipe 2 is detected through the natural gas sensor 4 because the gas content in different areas is possibly different, when the content is gradually reduced to have no exploitation value, the electric control butterfly valve 3 is gradually closed until being completely closed, the control device can effectively prevent the extraction of the impurities such as muddy sand water without natural gas, and the flow rate of the mixed natural gas is reduced after the mixed natural gas enters the separation tank 7, water and impurity sink, natural gas floats upward and enters the gas transmission pipeline 13, when the liquid level rises in the knockout drum 7 and the floating ball of the liquid level device 8 reaches the high position, the sewage pump 10 is started to increase the sewage speed, when the floating ball of the liquid level device 8 falls to the low position, the sewage pump 10 stops, and the natural gas is compressed into the natural gas tank 12 through the booster pump 14 to complete the exploitation simulation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The marine natural gas hydrate exploitation simulation device comprises a distribution tank (1), an exhaust pipe (2), a mixed delivery pump (5), a separation tank (7), a liquid level device (8), a blow-off pipe (9), a blow-off pump (10), a booster pump (14) and a natural gas tank (12), and is characterized in that the bottom end of the distribution tank (1) is connected with the exhaust pipe (2), the exhaust pipes are L-shaped and distributed in an annular array around the distribution tank, the top end of each exhaust pipe is provided with a natural gas sensor (4) and an electric control butterfly valve (3), the top end of the distribution tank is connected with the mixed delivery pump (5) through a mixed pipeline (6), and a discharge port of the mixed delivery pump is connected with the separation tank (7) through a feed pipeline (11); the separation tank is provided with a liquid level device (8), a sensing part of the liquid level device vertically extends into the separation tank, the bottom end of the separation tank is provided with a drain pipe (9) and a drain pump (10), the top end of the separation tank is connected with an air inlet of a booster pump (14) through an air pipeline (13), and an output port of the booster pump is communicated with a natural gas tank (12); the bottom end of the air suction pipe (2) is provided with pores (16) which are uniformly distributed on the horizontal section of the air suction pipe;
the use method of the simulation device comprises the following steps:
the simulation device is pressed to enable the extraction pipe (2) to be buried in the soft muddy ocean, the top of the mixing delivery pump is connected with a chemical reagent filling pipeline (17), hot seawater or chemical reagents are filled through the chemical reagent filling pipeline (17) to enable the marine natural gas hydrate to be decomposed, the situation that the solid hydrate cannot be extracted is avoided, negative pressure is generated through the mixing delivery pump (5), the mixing pipeline (6), the distribution tank (1) and the extraction pipe (2) generate negative pressure to simulate exploitation and extraction, the extracted natural gas necessarily contains water and gravel impurities, as the gas contents in different areas are the same or different, the natural gas content in the extraction pipe (2) is detected through a natural gas sensor (4), when the content is gradually reduced to a non-exploitation value, an electric control butterfly valve (3) is gradually closed until the natural gas is completely closed, the extraction of the impurities containing silt water and free of natural gas can be effectively controlled to prevent the extraction of the impurities containing silt water, the velocity of flow reduces after the mixed natural gas gets into knockout drum (7), and water and impurity sink, and the natural gas floats upward and gets into gas transmission pipeline (13), and when the liquid level rose when making the floater of level gauge (8) reach the high level in knockout drum (7), starts dredge pump (10) and increases blowdown speed, and the floater of level gauge (8) drops to the low level, and dredge pump (10) stop, and the natural gas accomplishes the exploitation simulation in passing through booster pump (14) compression income natural gas tank (12).
2. An ocean gas hydrate exploitation simulator according to claim 1, wherein a check valve (15) is provided between the booster pump (14) and the natural gas tank (12).
3. A marine natural gas hydrate production simulation device according to claim 1, wherein the feed pipe (11) is connected to the middle of the separation tank (7), and the bottom end of the float ball stroke of the liquid level gauge (8) is located at the feed pipe.
4. A marine natural gas hydrate production simulation device as claimed in claim 1, wherein the top of the mixing transfer pump (5) is connected with a chemical agent filling pipeline (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110881765.0A CN113445966B (en) | 2021-08-02 | 2021-08-02 | Ocean natural gas hydrate exploitation analogue means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110881765.0A CN113445966B (en) | 2021-08-02 | 2021-08-02 | Ocean natural gas hydrate exploitation analogue means |
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| Publication Number | Publication Date |
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| CN113445966A CN113445966A (en) | 2021-09-28 |
| CN113445966B true CN113445966B (en) | 2022-07-22 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204703861U (en) * | 2015-05-11 | 2015-10-14 | 中国石油天然气股份有限公司 | Downhole throttling gas well shaft simulation experiment device |
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| CN204703861U (en) * | 2015-05-11 | 2015-10-14 | 中国石油天然气股份有限公司 | Downhole throttling gas well shaft simulation experiment device |
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