CN111188607B - Method for mining natural gas hydrate by cooperation of magnetofluid replacement and microwave heating - Google Patents
Method for mining natural gas hydrate by cooperation of magnetofluid replacement and microwave heating Download PDFInfo
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- CN111188607B CN111188607B CN202010039362.7A CN202010039362A CN111188607B CN 111188607 B CN111188607 B CN 111188607B CN 202010039362 A CN202010039362 A CN 202010039362A CN 111188607 B CN111188607 B CN 111188607B
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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 73
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005065 mining Methods 0.000 title description 9
- 239000007788 liquid Substances 0.000 claims abstract description 33
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 21
- 239000002082 metal nanoparticle Substances 0.000 claims abstract description 21
- 239000003345 natural gas Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002086 nanomaterial Substances 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 229940031182 nanoparticles iron oxide Drugs 0.000 claims description 2
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 2
- 238000002637 fluid replacement therapy Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 150000004677 hydrates Chemical class 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000004058 oil shale Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- -1 natural gas hydrates Chemical class 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000002122 magnetic nanoparticle Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention belongs toThe technical field of natural gas hydrate exploitation, and relates to liquid CO2The method for exploiting the natural gas hydrate by the cooperation of magnetofluid replacement and microwave heating comprises the following steps: selecting a proper natural gas hydrate reservoir to establish a natural gas hydrate exploitation shaft; the microwave generator is put into the well from the well shaft; injecting liquid CO into natural gas hydrate reservoir2A magnetic fluid; starting a microwave generator to generate microwaves, heating the natural gas hydrate reservoir and simultaneously using liquid CO2Carrying out a displacement reaction with the natural gas hydrate, and decomposing the natural gas hydrate; and (4) producing fluids such as natural gas and the like through a recovery device, and separating to obtain the natural gas. The method is carried out by injecting liquid CO2The magnetic fluid enables the metal nano particles to be dispersed into the natural gas hydrate reservoir, enhances the microwave heating efficiency and utilizes CO to a certain extent2And CH4Displacement reaction between hydrates; by heating and CO2The replacement reaction is combined to promote the decomposition and exploitation of the natural gas hydrate.
Description
Technical Field
The invention belongs to the technical field of natural gas hydrate exploitation, and particularly relates to liquid CO2The method for exploiting natural gas hydrate by combining magnetofluid replacement and microwave heating.
Background
The natural gas hydrate is a hot spot of current research in the field of oil and gas industry, is considered as an ideal potential substitute energy in the 21 st century, countries in the world strive for increasing investment in the field of the natural gas hydrate, relevant research is developed, who can take the lead in the field and who has initiative for future development, and natural gas hydrate development plans are specified in the countries of the United states, Japan, Germany, India and the like. However, the current mining technology cannot meet the requirement of large-scale commercial development, the natural gas hydrate development is in a trial mining stage in the world at present, canada, the united states, japan and China are few countries in which the natural gas hydrate trial mining is carried out, and the trial mining results at home and abroad show that the natural gas hydrate mining efficiency is very low under the conditions of the prior art and the mining method. Therefore, a new natural gas hydrate exploitation method is explored, the exploitation efficiency is improved, the efficient and economic exploitation of the natural gas hydrate is realized, and the method has practical significance for guaranteeing the energy safety of China.
The existing exploitation methods mainly comprise a depressurization method, a hot fluid injection method, a water injection compound inhibitor method and CO2The displacement method, microwave heating for the exploitation of natural gas hydrates is also described in the literature. From the indoor experimental result of microwave heating of the natural gas hydrate, the heating efficiency of the microwave to the natural gas hydrate is high, the natural gas hydrate is rapidly heated and rapidly decomposed under the microwave condition, natural gas and water are continuously generated, and the generated water can further improve the decomposition rate of the hydrate. Compared with heating modes such as heat injection fluid heating and electric heating, the microwave heating is more efficient and energy-saving, and the energy efficiency ratio of the microwave heating in the experiment is between 3.752 and 6.452. Therefore, as an energy-saving and efficient heating mode, the microwave has good application potential in the field of natural gas hydrate exploitation.
However, the natural gas hydrate has a small dielectric constant, belongs to a weak wave absorption medium, and the microwave penetration distance is limited, which affects the efficiency of exploiting the natural gas hydrate by microwave heating. In order to improve the microwave heating efficiency, a proper amount of strong wave absorbing materials such as activated carbon, metals and oxides thereof are often added into a heated object, and the method for strengthening microwave heating is applied to the fields of food processing, road snow melting, oil shale mining and the like.
The patent 'horizontal well seam making method and underground oil shale oil and gas exploitation method' proposes an oil and gas exploitation method of firstly fracturing and then heating underground oil shale by microwave, wherein fracturing fluid adopts oil and gas exploitation method containing nano gamma-Fe2O3The exploitation mechanism of the method is that the seepage capability of underground oil shale is improved through fracturing, the microwave absorbent is conveyed and dispersed into the oil shale by means of the fracturing fluid, and then microwave heating is assisted by the microwave absorbent,the microwave heating efficiency is enhanced, and the efficient exploitation of the oil shale is realized. However, for the natural gas hydrate reservoir stratum, the burial depth is shallow, the fracturing is difficult to succeed for complete consolidation, and even if the fracturing succeeds, the reservoir stratum structure is damaged, and the sand production risk is increased, so that the method in the patent is not suitable for the natural gas hydrate. In addition, the content of mud in the natural gas hydrate reservoir is high, clay expansion may be caused by the water-based metal nanoparticle solution, the seepage capability of the reservoir is damaged, and meanwhile, water is a strong wave absorption medium and is not beneficial to the absorption of the natural gas hydrate to microwaves, so that how to inject the magnetic nanoparticles is also a problem.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides liquid CO2The method for exploiting natural gas hydrate by cooperating magnetofluid replacement and microwave heating disperses metal nanoparticles in liquid CO2Preparing magnetic fluid by injecting liquid CO2The magnetic fluid enables the metal nano particles to be dispersed into the natural gas hydrate reservoir, the natural gas hydrate reservoir is heated by microwaves, the natural gas hydrate is heated and decomposed, and the metal nano particles play a role in enhancing the microwave heating efficiency; simultaneous liquid CO2Can also generate a displacement reaction with natural gas hydrate under certain conditions to generate CO2Hydrate and natural gas, also improved the natural gas hydrate exploitation efficiency to a certain extent.
The technical scheme of the invention is as follows:
liquid CO2The method for exploiting the natural gas hydrate by the cooperation of magnetofluid replacement and microwave heating comprises the following steps: (1) selecting a proper natural gas hydrate reservoir to arrange a production well, completing drilling, cementing and well completion operations, and establishing a natural gas hydrate production shaft; (2) installing an oil pipe in the shaft, and putting the microwave generator into the well from the shaft through the oil pipe; (3) liquid CO is filled in the high-pressure pipeline2The high-pressure storage tank of the magnetic fluid is communicated with the shaft, and liquid CO is injected into the natural gas hydrate reservoir2A magnetic fluid; (4) starting a microwave generator to generate microwave, heating the natural gas hydrate reservoir and the likeLiquid CO2Carrying out a displacement reaction with the natural gas hydrate, and decomposing the natural gas hydrate; (5) and (4) producing fluids such as natural gas to the ground through a recovery device, and separating to obtain the natural gas.
Further, the high-pressure storage tank is connected with the shaft through a wellhead device, and a flow meter and a booster pump are installed between the high-pressure storage tank and the wellhead device.
Further, an electric stirrer is installed at the bottom of the high-pressure storage tank; the electric stirrer can play a role in dispersing metal nano particles, so that the prepared liquid CO2The magnetic fluid remains homogeneous.
Further, the liquid CO2The magnetic fluid is liquid CO2Adding a certain amount of metal nano particles into the mixture to prepare the composite material, wherein the metal nano particles are magnetic metal nano materials with strong wave-absorbing capacity.
Further, the metal nanoparticles are any one of iron oxide nanoparticles or nickel oxide nanoparticles.
Further, the content of the metal nanoparticles is optimized according to the size of the natural gas hydrate reservoir, the volume of the storage tank and the power of the electric stirrer. To liquid CO2Adding metal nano particles to prepare liquid CO2If the content of the added metal nanoparticles is too large, the magnetic fluid is easy to agglomerate and is difficult to disperse, and if the content of the added metal nanoparticles is too small, the magnetic fluid cannot fully play a role in the stratum, and the preferable concentration is 0.1 wt%.
Further, the installation position of the microwave generator is located at a natural gas hydrate reservoir stratum; the microwave generator belongs to a part of a microwave generating device, and the microwave generating device also comprises a centralizer and a packer; the centralizer is installed on the oil pipe, and the packer is fixedly installed between the oil pipe and the shaft.
The invention has the beneficial effects that:
(1) the invention provides a natural gas hydrate exploitation method by using liquid CO2As a solvent, the metal nano particles are injected and dispersed into the natural gas hydrate reservoir, thereby avoiding the situation thatThe damage of water to a reservoir and the absorption of microwaves are favorable for the thermal decomposition of natural gas hydrate and the seepage of natural gas;
(2) the metal nano particles are used as a strong wave absorption medium, so that the wave absorption and temperature rise capability of the natural gas hydrate reservoir can be improved, the heating efficiency of microwaves on the natural gas hydrate reservoir is enhanced, and the effect of exploiting natural gas hydrates by microwave heating is improved;
（3）CO2can generate a replacement reaction with natural gas hydrate under certain temperature and pressure conditions to generate CO2Hydrate and CH4Further improving the exploitation efficiency of the natural gas hydrate.
Drawings
FIG. 1 is a schematic diagram of a natural hydrate production process provided by an embodiment of the present invention;
in the above drawings: 1. an upper cladding layer; 2. a natural gas hydrate reservoir; 3. an underburden; 4. a wellbore; 5. a sleeve; 6. a wellhead assembly; 7. an oil pipe; 8. a packer; 9. a centralizer; 10. a microwave generator; 11. a high pressure storage tank; 12. a flow meter; 13. a booster pump.
Detailed Description
The technical solutions of the present invention will be described in detail and fully with reference to the following specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For a further understanding of the present invention, reference will now be made in detail to the following examples.
Examples
As shown in fig. 1, a method for exploiting natural gas hydrate by liquid CO2 magnetic fluid displacement and microwave heating in cooperation comprises the following steps:
(1) selecting a proper natural gas hydrate reservoir stratum 2 for well drilling, cementing wells by using a casing 5, installing a wellhead device 6, completing well cementing and well completion operations, and establishing a well bore 4 for natural gas hydrate exploitation;
(2) installing an oil pipe 7 in the shaft 4, and putting a microwave generator 10, a centralizer 9 and a packer 8 into the well from the shaft 4 through the oil pipe 7, wherein the installation position of the microwave generator 10 is positioned at the natural gas hydrate reservoir stratum 2; the centralizer 9 is installed on the oil pipe 7 and is positioned right above the microwave generator 10, and the packer 8 is fixedly installed between the oil pipe 7 and the shaft 4 and is positioned right above the centralizer 9;
(3) to the liquid CO2A certain amount of metal nano-particles are added into the high-pressure storage tank 11, an electric stirrer arranged at the bottom of the high-pressure storage tank 11 is started, and the metal nano-particles are continuously stirred in the liquid CO2Uniformly dispersed in the solution so as to prepare the liquid CO2The magnetic fluid keeps a uniform state; the wellhead device 6, the booster pump 13, the flowmeter 12 and the high-pressure storage tank 11 are connected in sequence by utilizing a high-pressure pipeline, and liquid CO contained in the high-pressure storage tank 112The magnetic fluid can be injected into the natural gas hydrate reservoir stratum 2 through the wellhead device 6;
(4) injecting liquid CO into Natural gas hydrate reservoir 22Magnetic fluid, liquid CO controlled by booster pump 13 and flow meter 122The injection amount of the magnetic fluid is controlled, and the injection of liquid CO is controlled according to the injection amount2Natural gas hydrate reservoir 2 pressure of the magnetic fluid;
(5) liquid CO2After the magnetic fluid is injected into the reservoir, starting a microwave generator 10 to generate microwaves, and heating the natural gas hydrate reservoir 2 to decompose the natural gas hydrate by heating;
(6) and (4) producing fluids such as natural gas to the ground through a recovery device, and separating to obtain the natural gas.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the scope of the present invention should be included in the patent protection scope of the present invention.
Claims (6)
1. Liquid CO2The method for exploiting the natural gas hydrate by the cooperation of magnetic fluid replacement and microwave heating is characterized by comprising the following steps of:
(1) selecting a proper natural gas hydrate reservoir to arrange a production well, completing drilling, cementing and well completion operations, and establishing a natural gas hydrate production shaft;
(2) installing an oil pipe in the shaft, and putting the microwave generator into the well from the shaft through the oil pipe;
(3) liquid CO is filled in the high-pressure pipeline2The high-pressure storage tank of the magnetic fluid is communicated with the shaft, and liquid CO is injected into the natural gas hydrate reservoir2A magnetic fluid;
(4) starting a microwave generator to generate microwaves, heating the natural gas hydrate reservoir and simultaneously using liquid CO2Carrying out a displacement reaction with the natural gas hydrate, and decomposing the natural gas hydrate;
(5) producing fluid containing natural gas to the ground through a recovery device, and separating to obtain natural gas;
the liquid CO2The magnetic fluid is liquid CO2Adding a certain amount of metal nano particles into the mixture to prepare the composite material, wherein the metal nano particles are magnetic metal nano materials with strong wave-absorbing capacity.
2. The method of claim 1, wherein the high pressure storage tank is connected to the wellbore via a wellhead, and wherein a flow meter and a booster pump are installed between the high pressure storage tank and the wellhead.
3. The method of claim 1, wherein a motorized agitator is mounted to the bottom of the high pressure storage tank.
4. The method of claim 1, wherein the metal nanoparticles are any one of iron oxide nanoparticles or nickel oxide nanoparticles.
5. The method of claim 3, wherein the metal nanoparticle content is determined based on natural gas hydrate reservoir size, high pressure storage tank volume, and electric blender power.
6. The method of claim 1, wherein the installation location of the microwave generator is at a natural gas hydrate reservoir; the microwave generator belongs to a part of a microwave generating device, and the microwave generating device also comprises a centralizer and a packer; the centralizer is installed on the oil pipe, and the packer is fixedly installed between the oil pipe and the shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010039362.7A CN111188607B (en) | 2020-01-15 | 2020-01-15 | Method for mining natural gas hydrate by cooperation of magnetofluid replacement and microwave heating |
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| CN202010039362.7A CN111188607B (en) | 2020-01-15 | 2020-01-15 | Method for mining natural gas hydrate by cooperation of magnetofluid replacement and microwave heating |
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| CN111188607A CN111188607A (en) | 2020-05-22 |
| CN111188607B true CN111188607B (en) | 2021-01-19 |
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| CN111520118B (en) * | 2020-06-12 | 2022-09-13 | 西南石油大学 | Recyclable heavy oil recovery method and system for heating injected solvent underground |
| CN112240188A (en) * | 2020-10-15 | 2021-01-19 | 吉林大学 | Method for assisting in exploiting natural gas hydrate by utilizing microwave reflecting wall |
| CN112253058B (en) * | 2020-10-19 | 2021-07-27 | 青岛海洋地质研究所 | System and method for artificially enriching and exploiting deep-water shallow-layer low-abundance unconventional natural gas |
| CN113338886A (en) * | 2021-07-19 | 2021-09-03 | 海南大学 | For CO2Microwave modified storage increasing technical equipment in underground sealing |
| CN114542021B (en) * | 2022-01-27 | 2023-05-23 | 华南理工大学 | Thermochemical method for strengthening CO 2 Replacement mining CH 4 Hydrate device and method |
| CN114776271A (en) * | 2022-05-12 | 2022-07-22 | 中国科学院地质与地球物理研究所 | Magnetic fluid enhanced electromagnetic heating device and method for preventing and treating secondary well hydrates |
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| CN1609409A (en) * | 2004-11-23 | 2005-04-27 | 中国科学院广州能源研究所 | Method and apparatus for producing natural gas hydras utilizing microwave heating |
| CA2879909C (en) * | 2012-07-25 | 2017-05-23 | Saudi Arabian Oil Company | Utilization of microwave technology in enhanced oil recovery process for deep and shallow applications |
| US9777563B2 (en) * | 2013-09-30 | 2017-10-03 | Chevron U.S.A. Inc. | Natural gas hydrate reservoir heating |
| CN104234680B (en) * | 2014-09-12 | 2016-09-14 | 哈尔滨工程大学 | Gas hydrates Rapid Thermal excites recovery method |
| CN209621290U (en) * | 2019-03-01 | 2019-11-12 | 中国石油大学(华东) | A kind of gas hydrates replacement exploitation device |
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