CN112127848B - Submarine combustible ice exploitation system - Google Patents
Submarine combustible ice exploitation system Download PDFInfo
- Publication number
- CN112127848B CN112127848B CN201910547204.XA CN201910547204A CN112127848B CN 112127848 B CN112127848 B CN 112127848B CN 201910547204 A CN201910547204 A CN 201910547204A CN 112127848 B CN112127848 B CN 112127848B
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- gas
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- combustible ice
- subsea
- liquid
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- 239000007788 liquid Substances 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000012429 reaction media Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 abstract description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 12
- VTVVPPOHYJJIJR-UHFFFAOYSA-N carbon dioxide;hydrate Chemical compound O.O=C=O VTVVPPOHYJJIJR-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001569 carbon dioxide Substances 0.000 abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000002360 explosive Substances 0.000 abstract description 3
- 239000012467 final product Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 35
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 28
- 239000003345 natural gas Substances 0.000 description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 5
- 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 description 5
- 238000005553 drilling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a submarine combustible ice exploitation system which solves the problems of natural disasters and pollution in the exploitation process. The micro-interface generator generates micro-bubbles and/or micro-droplet emulsion required by exploitation, then the micro-bubbles and/or micro-droplet emulsion are injected into the mixer main body to be fully mixed with gas or liquid in the mixer main body for reaction, and the final product is transmitted to the submarine flammable ice layer through the pipeline system, and the flammable ice is decomposed into liquid or solid to realize exploitation. Meanwhile, in order to avoid landslide or explosive pressure release of the seabed after the exploitation of the combustible ice, the carbon dioxide is converted into carbon dioxide hydrate through the micro-interface generator and the mixer body after the exploitation and is conveyed to the seabed, so that the space where the combustible ice exists is occupied.
Description
Technical Field
The present disclosure relates to the field of natural gas hydrate exploitation, and in particular to a subsea combustible ice exploitation system.
Background
Combustible ice is distributed in deep sea sediments or permanent frozen soil of land areas, and is an ice-like crystalline substance formed by natural gas and water under high pressure and low temperature conditions. The resource quantity of the combustible ice is equal to twice of the total quantity of the traditional fossil fuel carbon, and the natural gas content of the combustible ice is 60 times of the natural gas resource quantity, so the combustible ice has great exploitation value. As the formation condition of the combustible ice is high pressure and low temperature, once the pressure is lost or the temperature is increased, the combustible ice becomes gas, and natural gas steam is decomposed from solid state by utilizing the characteristic that the combustible ice is decomposed when the temperature is increased, and then the natural gas steam is conveyed to a ground collection platform, so that the exploitation of the combustible ice is completed, which is generally called as a pyrolysis method.
The "pyrolysis" process of producing combustible ice typically uses heated saturated brine containing ethylene glycol, which is injected into the production well and the ethylene glycol is separated. On the one hand, the ethylene glycol is high in price and high in commercial exploitation cost, and on the other hand, the treatment of the ethylene glycol after the use is finished is complex, so that the environment is polluted slightly carelessly.
Meanwhile, the combustible ice is in a stable solid crystal shape on the sea floor, if the combustible ice is decomposed by a pyrolysis method, huge gas reserves can exist under the combustible ice layer, so that the combustible ice is likely to cause landslide on the sea floor or explosive pressure release, and equipment and personnel are lost.
Disclosure of Invention
The purpose of the present disclosure is to provide a submarine combustible ice exploitation system, which achieves the effect of safe and pollution-free exploitation.
The technical aim of the disclosure is achieved by the following technical scheme:
the submarine combustible ice exploitation system comprises a well, a pipeline system, a camera system, a control system, a gas concentration sensor, a gas-liquid separator and a gas collecting device, wherein the camera system is arranged in the pipeline system, the pipeline system is arranged in the well, a vertical pipe is arranged in the pipeline system, one end of the vertical pipe, which is close to the sea level, is provided with an inlet and an outlet, the gas-liquid separator is connected at the outlet, and the gas collecting device is connected with the gas-liquid separator;
the gas concentration sensor is arranged in the pipeline system and close to the seabed combustible ice layer; the gas concentration sensor is used for monitoring and transmitting the concentrations of natural gas and carbon dioxide in the combustible ice layer in real time;
the micro-interface generator is connected with the mixer main body, and the mixer main body is connected at the inlet of the pipeline system;
the control system is connected with the micro-interface generator, the mixer main body, the gas concentration sensor, the gas-liquid separator and the gas collecting device.
Further, the mixer body is a mixing chamber of a gas-liquid, liquid-solid, gas-liquid, gas-liquid-solid, and liquid-solid multiphase reaction medium.
Further, the micro-interface generator is a bubble breaker and/or a droplet breaker; the bubble breaker is at least one of a pneumatic bubble breaker and a hydraulic bubble breaker.
Preferably, the micro-interface generator is connected to the inlet end of the mixer body, and the micro-interface generator is arranged in at least one group. The purpose of the micro-interface generator is to generate micro-bubbles and/or micro-droplet emulsions, the quantity being set primarily for the need to fill the bubbles and/or micro-droplets with liquid or gas.
Further, the camera system comprises an underwater camera, an underwater illuminating lamp, an underwater Ethernet cable, an underwater mounting bracket and a water surface control device; the water surface control device comprises a remote control unit, a data receiving unit and a power supply unit.
Preferably, the imaging system is provided separately and independently from the control system. The camera system is provided with a remote control unit, a data receiving unit and a power supply unit, can be flexibly used, does not need to be connected with the control system, and can complete camera shooting through connection control of the control system when the remote control unit of the camera system fails.
Preferably, the underwater illuminating lamp is an LED lamp or a halogen lamp.
Further, the control system comprises a control module, a monitoring module, a communication module and a display module.
Preferably, the gas-liquid separator is a tube separator or a cyclone separator.
Preferably, there is at least one riser within the piping system, the riser being a steel riser.
In summary, the beneficial effects of the present disclosure are: the submarine combustible ice exploitation system comprises a well, a pipeline system, a camera system, a control system, a gas concentration sensor, a gas-liquid separator, a gas collecting device, a micro-interface generator and a mixer main body, exploitation work and progress control of the whole exploitation system can be controlled and arranged through the control system, the camera system can feed back the exploitation progress to the ground in an image mode in real time, the micro-interface generator mainly generates micro bubbles and/or micro droplet emulsion needed by exploitation, the micro bubbles and/or micro droplet emulsion is injected into the mixer main body to be fully mixed and reacted with gas or liquid in the mixer main body, and a final product is transmitted to a submarine combustible ice layer through the pipeline system, so that the combustible ice is decomposed into liquid or solid to realize exploitation.
Meanwhile, in order to avoid landslide or explosive pressure release of the seabed after the exploitation of the combustible ice, the carbon dioxide is converted into carbon dioxide hydrate through the micro-interface generator and the mixer body after the exploitation and is conveyed to the seabed, so that the space where the combustible ice exists is occupied.
Drawings
FIG. 1 is a schematic diagram of a system architecture of the present disclosure;
in the figure: 1-drilling; 2-piping; 3-a control system; 4-a gas concentration sensor; a 5-camera system; 6-a gas-liquid separator; 7-a gas collection device; 8-a micro-interface generator; 9-a mixer body; 21-a riser; 211-inlet; 212-outlet; 51-a water surface control device.
Detailed Description
The present disclosure is described in further detail below with reference to the accompanying drawings.
In the description of the present disclosure, it should be understood that the terms "remote," "near," and the like indicate orientations or positional relationships, and are merely for convenience in describing and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
The submarine combustible ice exploitation system comprises a well drilling 1, a pipeline system 2, a camera system 5, a control system 3, a gas concentration sensor 4, a micro-interface generator 8, a mixer main body 9, a gas-liquid separator 6 and a gas collecting device 7, wherein the relation among the components and the system is as follows: the camera system 5 is arranged in the pipeline system 2, the pipeline system 2 is arranged in the well drilling 1, a vertical pipe 21 is arranged in the pipeline system 2, at least one vertical pipe 21 is arranged in the pipeline system 2, and the vertical pipe 21 is a steel vertical pipe; the riser 21 is provided with an inlet 211 and an outlet 212 at one end near the sea level, the gas-liquid separator 6 is connected to the outlet 212, the gas collecting device 7 is connected to the gas-liquid separator 6, and the gas-liquid separator 6 is a tubular separator or a cyclone separator.
The gas concentration sensor 4 is arranged in the pipeline system 2 near the seabed combustible ice layer; a micro-interface generator 8 and a mixer body connection 9, the mixer body 9 being connected at an inlet 211 of the pipe system 2; the control system 3 is connected with the micro-interface generator 8, the mixer main body 9, the gas concentration sensor 4, the gas-liquid separator 6 and the gas collecting device 7.
Generally, the mixer body is a mixing chamber for gas-liquid, liquid-solid, gas-liquid, gas-liquid-solid, and liquid-solid multiphase reaction media, and the mixer body 9 includes a tank mixer, a pipe mixer, a tower mixer, a fixed bed mixer, a fluidized bed mixer, or the like.
The micro-interface generator 8 is a bubble breaker and/or a droplet breaker. Comprises a mechanical microstructure and/or a turbulent microstructure, and gas phase and/or liquid phase in the multiphase reaction medium are/is broken into micro bubbles and/or micro liquid drops with the diameter of micron level through a micro channel action mode, a field force action mode and a mechanical energy action mode or any combination of the three modes. The micro-channel function mode is to break the gas phase and/or liquid phase passing through the micro-channel into micro-bubbles and/or liquid drops by constructing the micro-structure of the flow channel; the field force acts in a non-contact way by utilizing external field force to input energy to the fluid so as to break the fluid into micro bubbles or micro drops; the mechanical energy acts by converting the mechanical energy of the fluid into the surface energy of the bubbles or droplets, and breaking the bubbles or droplets into microbubbles or droplets.
As one embodiment, the micro-interface generator 8 is any physical plane, and the plane has holes penetrating through it, and each hole includes a gas inlet and a gas outlet, the width of the gas outlet is greater than that of the gas inlet, if micron-sized bubbles are to be generated, the average width of the gas outlet is 5 microns to 90 microns, and the average width of the gas inlet is 1 micron to 5 microns.
The micro-interface generator 8 is connected to the inlet end of the mixer body 9, and is arranged in at least one group. When a large number of microbubbles and/or droplet emulsions need to be generated, the micro-interface generator 8 may be provided with multiple sets.
The camera system 5 of the mining system comprises an underwater camera, an underwater illumination lamp, an underwater ethernet cable, an underwater mounting bracket and a water surface control device 51, and the water surface control device 51 comprises a remote control unit, a data receiving unit and a power supply unit. The underwater camera is a 720-degree panoramic camera, the underwater illuminating lamp is an LED lamp or a halogen lamp, the underwater Ethernet cable is used for transmitting underwater image data in real time, and the underwater mounting bracket is used for mounting and stabilizing the underwater camera. The remote control unit is used for realizing triggering control, synchronization and network connection of the underwater camera, light control of the underwater illuminating lamp and the like; the data receiving unit is used for receiving the shooting data of the underwater camera, and the power supply unit is used for supplying power to the whole underwater camera.
The control system 3 comprises a control module, a monitoring module, a communication module and a display module, wherein the control module comprises a main control circuit, a processor module, a heating circuit, a gas-liquid control circuit and the like, so that the control of the whole exploitation system is realized.
The imaging system 5 may be provided separately and independently from the control system 3. Because the camera system is provided with the remote control unit, the data receiving unit and the power supply unit, the camera system can be flexibly used without being connected with the control system 3, and when the remote control unit of the camera system 5 fails, the camera can be completed through the connection control of the control system 3.
The operating principle of the submarine combustible ice mining system is as follows: the present disclosure is implemented on the premise that the well 1 has been probed, and that the tubing 2 within the well 1 comprises a number of risers 21. At the beginning of exploitation, a proper amount of saturated brine (the sodium chloride content is between 10% and 22%) is injected into the mixer main body 9, natural gas passes through the micro-interface generator 8 and generates micro-bubbles and/or micro-droplet emulsion under the action of the micro-interface generator, the micro-bubbles and/or the micro-droplet emulsion enter the mixer main body 9 through the inlet end, and the saturated brine is filled with the micro-bubbles under the action of the mixer main body 9, so that the saturated brine is in an emulsion state.
The saturated brine in the emulsion state is heated and then is input into a seabed combustible ice layer through a pipeline system 2, the combustible ice starts to decompose to obtain natural gas hydrate, the natural gas hydrate is transported to the sea level through the pipeline system 2, the natural gas is separated from water and the saturated brine through a gas-liquid separator 6, the water and the saturated brine can be directly discharged into the sea surface without pollution, the natural gas is collected by a gas collecting device and put into use after separation, the whole process is controlled by a control system 3, and a shooting system 5 shoots in real time and transmits data to a water surface control device 51.
The vertical pipe 21 for inputting the heated saturated brine into the combustible ice layer is close to the combustible ice layer, if natural gas is required to be conveyed to the ground through another vertical pipe after the combustible ice layer is decomposed, the installation depth of the vertical pipe for conveying the natural gas on the seabed is deeper than that of the vertical pipe 21, and the natural gas is suitable to be collected and conveyed.
The gas-liquid separator 6 may be a tube separator or a cyclone separator.
During exploitation, the gas concentration sensor 4 feeds back the concentration of the combustible ice layer gas in real time so as to adjust the temperature and the total amount of the input saturated brine in real time. When the exploitation amount of the seabed combustible ice layer reaches a certain degree, fillers should be added to the exploited area in order to avoid unnecessary ocean natural disasters. Since the carbon dioxide hydrate formation pressure is lower than the natural gas hydrate formation pressure at the same pressure, a portion of the natural gas hydrate is converted to a more stable carbon dioxide hydrate after the carbon dioxide hydrate is injected into the combustible ice storage layer.
Therefore, when the heated saturated brine filled with the micro-bubbles and/or micro-droplet emulsion breaks down the combustible ice, the micro-interface generator 8 and the mixer main body 9 can act on the carbon dioxide and the water, the micro-interface generator 8 breaks the carbon dioxide gas into micro-sized bubbles and/or micro-droplet emulsion, the micro-interface generator 8 injects the micro-sized bubbles and/or micro-droplet emulsion into the water, the micro-sized bubbles and/or micro-droplet emulsion form carbon dioxide hydrate through the action of the mixer main body 9, the carbon dioxide hydrate is conveyed to a combustible ice layer, and natural gas is conveyed to the sea level after the replacement of the carbon dioxide hydrate is completed.
In summary, the micro-interface generator 8 and the mixer main body 9 can actually have two functions in the disclosure, so that the synthesis of the micro-bubbles and/or micro-droplet emulsion of the saturated brine and the natural gas can be completed, and the synthesis of the micro-bubbles and/or micro-droplet emulsion of the carbon dioxide gas and the water can also be completed. Of course, the content of gas and liquid or solid used in the micro-interface generator 8 and the mixer body 9 in actual exploitation is related to exploitation environment and exploitation amount, and the related burst factors are also more, and specific analysis of specific problems is needed.
It is to be understood that the foregoing is illustrative of the present disclosure and is not to be construed as limited to the specific embodiments disclosed, and that the present disclosure is defined by the claims and their equivalents.
Claims (7)
1. The submarine combustible ice exploitation system comprises a well, a pipeline system, a camera system, a control system, a gas concentration sensor, a gas-liquid separator and a gas collecting device, and is characterized in that the camera system is arranged in the pipeline system, the pipeline system is arranged in the well, a vertical pipe is arranged in the pipeline system, one end of the vertical pipe, which is close to the sea level, is provided with an inlet and an outlet, the gas-liquid separator is connected at the outlet, and the gas collecting device is connected with the gas-liquid separator;
the gas concentration sensor is arranged in the pipeline system and close to the seabed combustible ice layer;
the micro-interface generator is connected with the mixer main body, and the mixer main body is connected at the inlet of the pipeline system;
the control system is connected with the micro-interface generator, the mixer main body, the gas concentration sensor, the gas-liquid separator and the gas collecting device;
the mixer body is a mixing chamber of gas-liquid, liquid-solid, gas-liquid, gas-liquid-solid and liquid-solid multiphase reaction medium;
the micro-interface generator is a bubble breaker and/or a droplet breaker;
the micro-interface generator is connected to the inlet end of the mixer body and is arranged in at least one group.
2. The subsea combustible ice production system of claim 1, wherein the camera system includes a subsea camera, a subsea light, a subsea ethernet cable, a subsea mounting frame, and a surface control device; the water surface control device comprises a remote control unit, a data receiving unit and a power supply unit.
3. A subsea combustible ice production system according to claim 2, wherein the camera system is provided separately from the control system.
4. The subsea combustible ice production system of claim 2, wherein the subsea light is an LED light or a halogen light.
5. The subsea combustible ice production system of claim 1, wherein the control system includes a control module, a monitoring module, a communication module, and a display module.
6. The subsea combustible ice production system of claim 1, wherein the gas-liquid separator is a tube separator or a cyclone separator.
7. The subsea combustible ice production system of claim 1, wherein there is at least one riser within the piping system, the riser being steel.
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| CN201910547204.XA CN112127848B (en) | 2019-06-24 | 2019-06-24 | Submarine combustible ice exploitation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910547204.XA CN112127848B (en) | 2019-06-24 | 2019-06-24 | Submarine combustible ice exploitation system |
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| CN112127848A CN112127848A (en) | 2020-12-25 |
| CN112127848B true CN112127848B (en) | 2023-09-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704894A (en) * | 2012-05-30 | 2012-10-03 | 上海交通大学 | In-situ submarine natural gas hydrate exploiting device and method thereof |
| CN102787830A (en) * | 2012-08-17 | 2012-11-21 | 山东大学 | Method and device for exploiting deep sea combustible ice |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN105625998A (en) * | 2016-02-02 | 2016-06-01 | 西南石油大学 | Reverse production method and production equipment for seafloor natural gas hydrate stable layer |
-
2019
- 2019-06-24 CN CN201910547204.XA patent/CN112127848B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704894A (en) * | 2012-05-30 | 2012-10-03 | 上海交通大学 | In-situ submarine natural gas hydrate exploiting device and method thereof |
| CN102787830A (en) * | 2012-08-17 | 2012-11-21 | 山东大学 | Method and device for exploiting deep sea combustible ice |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN105625998A (en) * | 2016-02-02 | 2016-06-01 | 西南石油大学 | Reverse production method and production equipment for seafloor natural gas hydrate stable layer |
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