CN117211741A - In-situ hydrogen production and recovery ratio improvement method for medium-deep and deep water-immersed gas reservoirs - Google Patents
In-situ hydrogen production and recovery ratio improvement method for medium-deep and deep water-immersed gas reservoirs Download PDFInfo
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- CN117211741A CN117211741A CN202311139025.5A CN202311139025A CN117211741A CN 117211741 A CN117211741 A CN 117211741A CN 202311139025 A CN202311139025 A CN 202311139025A CN 117211741 A CN117211741 A CN 117211741A
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 66
- 239000001257 hydrogen Substances 0.000 title claims abstract description 66
- 239000007789 gas Substances 0.000 title claims abstract description 65
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 61
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 239000012528 membrane Substances 0.000 claims abstract description 19
- 239000003345 natural gas Substances 0.000 claims abstract description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 13
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 10
- 230000009545 invasion Effects 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000013589 supplement Substances 0.000 claims abstract description 4
- 239000003054 catalyst Substances 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 238000000629 steam reforming Methods 0.000 claims description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000007809 chemical reaction catalyst Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Abstract
The invention relates to a method for in-situ hydrogen production and recovery improvement of a middle-deep and deep water-immersed gas reservoir, which comprises the steps of well pattern encryption of the existing middle-deep water-immersed gas reservoir and five-point well pattern arrangement; placing a hydrogen filtering membrane at the upper part of a production section of the encryption well, and installing a packer at the lower part of the hydrogen filtering membrane; opening the production of the encryption well, and immediately stopping the production when the well bore is water; injecting a chemical ignition agent and an oxygen-enriched or pure oxygen gas into the encryption well; closing the well after stopping injection, and opening the well to only extract hydrogen to the ground through a hydrogen filtering membrane of the encryption well; the old well is then opened to begin production of natural gas. The invention utilizes the encryption well to prepare hydrogen in situ to obtain a great amount of tail gas (CO) produced by green hydrogen at the same time 2 、CO、N 2 Etc.) to supplement formation energy to achieve hold-down of bottom water while competing adsorption mechanisms of carbon dioxide may be shifted outThe natural gas in the adsorption state is adsorbed, so that the recovery ratio of the deep water invasion gas reservoir is improved, and in addition, carbon dioxide generated by hydrogen production from the natural gas is subjected to in-situ sealing, so that clean energy exploitation is realized.
Description
Technical Field
The invention relates to a method for in-situ hydrogen production and recovery enhancement of a medium-deep water-immersed gas reservoir, belonging to the technical field of petroleum and natural gas exploitation.
Background
Because China depends on high pollution energy sources such as coal for a long time, natural and living environments are greatly endangered, and natural gas is increasingly favored worldwide as an energy source with relatively small environmental pollution, so that the natural gas is greatly developed to replace the high pollution energy source, and the natural gas becomes an important task.
In order to meet the increasing demand of natural gas in the middle eastern area, two projects of Western gas east transportation and Sichuan gas east transportation are successfully started in China, and most of gas fields in China are developed from the 50 s so far, stratum water is discharged from most of the gas fields, water and gas reservoirs account for most of the total number of the gas reservoirs, and stable production and production of the gas reservoirs and the gas fields are seriously influenced.
The current in situ hydrogen production process of the gas reservoir is generally as follows: and (3) reacting the natural gas with steam at high temperature to finally generate carbon monoxide, carbon dioxide and oxygen. However, in the process of producing hydrogen from natural gas, a large amount of carbon dioxide is produced in both the combustion of external fuel and the process of producing hydrogen from natural gas, and a large amount of carbon emission is obviously unfavorable for environmental protection.
Therefore, there is a need for a method for in situ hydrogen production in deep and medium water-immersed reservoirs and for enhanced recovery of aqueous reservoirs.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method for in-situ hydrogen production and recovery improvement of a medium-deep water-immersed gas reservoir.
The technical scheme provided by the invention for solving the technical problems is as follows: a method for in-situ hydrogen production and recovery enhancement of a medium-deep and deep water-immersed gas reservoir, which comprises the following steps:
well pattern encryption is carried out on the existing medium-deep water invasion gas reservoir, and a five-point well pattern is arranged;
carrying out volume fracturing on the encrypted well to form a volume fracture network, wherein a water gas conversion catalyst and a steam reforming reaction catalyst are added into a propping agent of the volume fracture network;
placing a hydrogen filtering membrane at the upper part of a perforation section of the encryption well, and installing a packer at the lower part of the perforation section (positioned below the hydrogen filtering membrane); the upper part of the perforating section is used as a production section, a hydrogen filtering membrane is placed, a packer is placed between the upper seal of the perforating section and the lower section, and the lower part of the separator, namely the lower section of the perforating section, is used as an injection section;
opening the encryption well, producing through the production section, and immediately stopping production when the well bore is water;
injecting oxygen-enriched or pure oxygen gas into the encryption well from the injection section through an injection string, and simultaneously, putting an igniter or injecting a chemical igniter to ignite the gas reservoir;
closing the well after stopping injection, and opening the well to only extract hydrogen to the ground through a hydrogen filtering membrane of the encryption well;
repeating the steps after the encryption well is water-flooded again, continuously huff and puff the operation to produce hydrogen, continuously supplementing energy to the old well to press the water cone, opening the old well to start producing natural gas, realizing the reproduction, if the old well is water-flooded again, stopping for a period of time, waiting for new carbon dioxide produced by the encryption well to supplement the energy to press the water cone, and continuously opening the old well to produce.
The further technical scheme is that the well spacing of the five-point well pattern is between 500 and 2000 m.
The further technical proposal is that the mixing proportion of the catalyst and the propping agent is between 0.01 and 0.3.
The water gas conversion catalyst is one or more of nickel-based catalyst, copper-based catalyst, iron-based catalyst and chromium-based catalyst.
The further technical scheme is that the steam reforming catalyst is one or more of a nickel-based catalyst, a chromium-based catalyst and a platinum-based catalyst.
The further technical scheme is that oxygen-enriched or pure oxygen gas is injected into the encryption well, and simultaneously, the ignition gas reservoir is ignited by the lower igniter or the injection of chemical ignition agent comprises: an injection pipe column is arranged in the encryption well, oxygen-enriched or pure oxygen gas is injected into a volume seam net of the encryption well through the injection pipe column, and an igniter is added or a chemical igniter is injected to ignite a gas reservoir, so that the temperature of the gas reservoir is higher than the temperature of hydrogen production reaction, at least one hydrogen production reaction of water gas conversion or steam reforming occurs, and a large amount of carbon dioxide and heat are generated.
The further technical proposal is that oxygen-enriched or pure oxygen gas is combusted in situ to ensure that the temperature of the volume stitch net reaches more than 450 ℃.
The further technical scheme is that a hydrogen filtering membrane and a packer are placed on a perforation section of an encrypted well, the perforation section at the lower part of the packer is an injection section, and the upper part of the perforation section is a production section.
The invention has the following beneficial effects: the invention is based on the enrichment characteristic that the well distance of the middle-deep water invasion gas reservoir is large, and residual gas after water invasion is enriched between double wells, and encryption wells are arranged between gas wells to form a five-point well pattern. The carbon dioxide and the heat energy generated by 4 encryption wells are used for energy supplement to a well reservoir by carrying out in-situ combustion hydrogen production operation (only hydrogen is produced) on the encryption wells, and simultaneously the natural gas in an adsorption state is replaced by utilizing a competitive adsorption mechanism of the carbon dioxide, so that the recovery ratio of deep water invasion gas reservoir is improved by pressing bottom water, and meanwhile, the carbon dioxide generated by hydrogen production from the natural gas is subjected to in-situ sealing.
Drawings
FIG. 1 is a plan view of a well pattern layout;
FIG. 2 is a schematic cross-sectional view of a well pattern layout;
FIG. 3 is a schematic cross-sectional illustration of a well connection between a freeze well and an old well.
The figure shows: 1-old well, 2-encrypted well, 3-hydrogen filtering membrane, 4-gas reservoir, 5-flooded area, 6-volume stitch net, 7-packer and 8-gas injection pipe.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention relates to a method for in-situ hydrogen production and recovery enhancement of a medium-deep water-immersed gas reservoir, which comprises the following steps:
step 1, well pattern encryption is carried out on the existing middle-deep water-immersed gas reservoir, a five-point well pattern (shown in figure 1) is arranged, and the well distance is between 500 and 2000 m;
step 2, carrying out volume fracturing on the encrypted well to form a volume fracture network, wherein a catalyst is added into a propping agent of the volume fracture network; the mixing proportion of the catalyst and the propping agent is between 0.01 and 0.3;
the catalyst comprises a water gas conversion catalyst (one or more of a nickel-based catalyst, a copper-based catalyst, an iron-based catalyst and a chromium-based catalyst) and a steam reforming reaction catalyst (one or more of a nickel-based catalyst, a chromium-based catalyst and a platinum-based catalyst);
step 3, placing a hydrogen filtering membrane at the upper part of a perforation section of the encryption well, and installing a packer at the lower part of the perforation section (positioned below the hydrogen filtering membrane); wherein the upper part of the perforation section is used as a production section, and the lower part of the perforation section is used as an injection section;
step 4, opening the encryption well, producing through a production section, and immediately stopping production when the well bore is water;
and 5, injecting oxygen-enriched or pure oxygen gas into the encryption well, and simultaneously, putting an igniter or injecting a chemical igniter to ignite the gas reservoir, wherein the steps comprise: an injection pipe column is arranged in the encryption well, oxygen-enriched or pure oxygen gas is injected into a volume seam net of the encryption well through the injection pipe column, an igniter is added or a chemical igniter is injected to ignite a gas reservoir, so that the temperature of the gas reservoir is higher than the temperature of hydrogen production reaction, at least one hydrogen production reaction of water gas conversion or steam reforming occurs, and a large amount of carbon dioxide and heat are generated;
the gas reservoir combustion and in-situ hydrogen production reactions are respectively as follows:
CH 4 (g)+O 2 (g)—CO 2 (g)+H 2 O(g)
CH 4 (g)+1.5O 2 (g)—CO(g)+2H 2 O(g)
CO(g)+H 2 O(g)—H 2 (g)+CO 2 (g)
CH 4 (g)+H 2 O(g)—CO(g)+3H 2 (g)；
step 6, closing the well after stopping injection, and then opening the well, and only exploiting hydrogen to the ground through a hydrogen filtering membrane of the encryption well;
and 7, opening the old well to start producing natural gas to realize the production again, continuously huff and puff the encrypted well, continuously supplementing energy to the old well, if the old well is flooded again, stopping the old well for a period of time, waiting for new carbon dioxide supplementing energy generated by the encrypted well to press the water cone, and continuously opening the old well to produce, thereby realizing the continuous development of in-situ hydrogen production and recovery improvement of the deep water invasion gas reservoir.
According to the invention, the encryption well is used for carrying out in-situ hydrogen production operation, and then the old well production is opened, so that the circulation huff-puff operation can be carried out on the encryption well and the old well, and the in-situ hydrogen production of the deep water invasion gas reservoir and the recovery ratio improvement can be continuously carried out.
Examples
Selecting a middle-deep layer and deep water invasion gas reservoir, and arranging an encrypted five-point well pattern (figure 1), wherein the well spacing is between 500m and 2000m, and performing volume fracturing after new well digging to form a volume fracture pattern 6; mixing a water gas conversion catalyst and a steam reforming catalyst (the mixing ratio is 0.01-0.3) into a propping agent of a volume slotted screen 6, taking the upper part of a perforation section of an encryption well 2 as a production section, placing a hydrogen filtering membrane 3, placing a packer 7 between an upper seal and a lower section of the perforation section, and taking the lower part of the separator 7, namely the lower section of the perforation section, as an injection section;
after the five-point well pattern is arranged, firstly, the encryption well 2 is opened, the production is mainly carried out through a production section, when the water in the well bore is taken up, the production is stopped immediately, the injection pipe column 8 is put down, pure oxygen or oxygen-enriched and an igniter are injected for in-situ combustion, so that the temperature of the volume gap net 6 reaches more than 450 ℃, at least one hydrogen production reaction of water gas conversion or steam reforming occurs, and a large amount of CO is produced simultaneously 2 And heat;
closing the gas injection pipe column 8, opening the sleeve of the encryption well 2 to start production, collecting hydrogen through the hydrogen filtering membrane 3, and collecting the rest of the hydrogen by using hot CO 2 The dominant tail gas is retained in the reservoir due to CO 2 Has extremely strong diffusion effect, flows to the direction of the reservoir of the old well under the pressure difference and the diffusion effect, and replaces the adsorbed gas in the reservoirAnd driving the water cone to the old well 1, and supplementing the reservoir energy of the control area of the old well 1 to press the water cone;
then the old well 1 is opened to start producing natural gas, the production is realized, the production well 2 (hydrogen producing well) continuously carries out the huff-puff operation all the time, the energy is continuously supplied to the old well 1 (natural gas producing well), if the old well 1 is flooded again, the new CO generated by the production well 2 is waited after a period of time of closing 2 After the water cone is pressed by supplementing energy, the old well 1 is continuously opened for production. By displacement of CO from natural gas 2 The method is sealed in situ in the reservoir, realizes in-situ hydrogen production of medium-deep water-immersed gas reservoirs and improves recovery ratio, and can simultaneously produce CO in-situ hydrogen production 2 The clean exploitation of energy sources is realized by in-situ utilization and sealing.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the equivalent embodiments without departing from the scope of the technical solution of the present invention, but any simple modification, equivalent changes and modifications to the above-mentioned embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.
Claims (8)
1. The in-situ hydrogen production and recovery ratio improvement method for medium-deep and deep water-immersed gas reservoirs is characterized by comprising the following steps:
well pattern encryption is carried out on the existing medium-deep water invasion gas reservoir, and a five-point well pattern is arranged;
carrying out volume fracturing on the encrypted well to form a volume fracture network, wherein a water gas conversion catalyst and a steam reforming reaction catalyst are added into a propping agent of the volume fracture network;
placing a hydrogen filtering membrane at the upper part of a perforation section of the encryption well, and installing a packer at the lower part of the hydrogen filtering membrane; the upper part of the perforating section is used as a production section, a hydrogen filtering membrane is placed, a packer is placed between the upper seal of the perforating section and the lower section, and the lower part of the separator, namely the lower section of the perforating section, is used as an injection section;
opening the encryption well, producing through the production section, and immediately stopping production when the well bore is water;
injecting oxygen-enriched or pure oxygen gas into the encryption well from the injection section through an injection string, and simultaneously, putting an igniter or injecting a chemical igniter to ignite the gas reservoir;
closing the well after stopping injection, and opening the well to only extract hydrogen to the ground through a hydrogen filtering membrane of the encryption well;
repeating the steps after the encryption well is water-flooded again, continuously huff and puff the operation to produce hydrogen, continuously supplementing energy to the old well to press the water cone, opening the old well to start producing natural gas, realizing the reproduction, if the old well is water-flooded again, stopping for a period of time, waiting for new carbon dioxide produced by the encryption well to supplement the energy to press the water cone, and continuously opening the old well to produce.
2. The method for in-situ hydrogen production and enhanced oil recovery of a mid-deep, deep water-immersed gas reservoir of claim 1, wherein the five-point well pattern has a well spacing between 500 and 2000 m.
3. The method for in-situ hydrogen production and enhanced oil recovery from a mid-deep, deep water-immersed gas reservoir of claim 1, wherein the mixing ratio of catalyst to proppant is between 0.01 and 0.3.
4. The method for in-situ hydrogen production and enhanced oil recovery from a mid-deep, deep water-immersed gas reservoir of claim 1, wherein the water gas shift catalyst is one or more of a nickel-based catalyst, a copper-based catalyst, an iron-based catalyst, and a chromium-based catalyst.
5. The method for in-situ hydrogen production and enhanced oil recovery from a mid-deep, deep water-immersed gas reservoir of claim 1, wherein the steam reforming catalyst is one or more of a nickel-based catalyst, a chromium-based catalyst, and a platinum-based catalyst.
6. The method of in situ hydrogen production and enhanced oil recovery from a mid-deep, deep water-immersed gas reservoir of claim 1, wherein injecting oxygen-enriched or pure oxygen gas into the well while lowering an igniter or injecting a chemical igniter to ignite the gas reservoir comprises: an injection pipe column is arranged in the encryption well, oxygen-enriched or pure oxygen gas is injected into a volume seam net of the encryption well through the injection pipe column, and an igniter is added or a chemical igniter is injected to ignite a gas reservoir, so that the temperature of the gas reservoir is higher than the temperature of hydrogen production reaction, at least one hydrogen production reaction of water gas conversion or steam reforming occurs, and a large amount of carbon dioxide and heat are generated.
7. The method for in-situ hydrogen production and enhanced oil recovery from a mid-deep, deep water-immersed gas reservoir of claim 6, wherein oxygen-enriched or pure oxygen gas is combusted in-situ to bring the temperature of the volumetric mesh to above 450 ℃.
8. The method for in-situ hydrogen production and enhanced recovery from a mid-deep and deep water-immersed gas reservoir of claim 1, wherein a hydrogen filtering membrane and a packer are placed on a perforation section of the encryption well, the perforation section at the lower part of the packer is an injection section, and the upper part of the perforation section is a production section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311139025.5A CN117211741A (en) | 2023-09-04 | 2023-09-04 | In-situ hydrogen production and recovery ratio improvement method for medium-deep and deep water-immersed gas reservoirs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311139025.5A CN117211741A (en) | 2023-09-04 | 2023-09-04 | In-situ hydrogen production and recovery ratio improvement method for medium-deep and deep water-immersed gas reservoirs |
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| Publication Number | Publication Date |
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| CN117211741A true CN117211741A (en) | 2023-12-12 |
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| CN202311139025.5A Pending CN117211741A (en) | 2023-09-04 | 2023-09-04 | In-situ hydrogen production and recovery ratio improvement method for medium-deep and deep water-immersed gas reservoirs |
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| Country | Link |
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| CN (1) | CN117211741A (en) |
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- 2023-09-04 CN CN202311139025.5A patent/CN117211741A/en active Pending
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