CN110552678A - method for producing hydrogen by reverse well arrangement, one injection and multiple production supercritical combustion gasification of deep and super-thick layer coal - Google Patents
method for producing hydrogen by reverse well arrangement, one injection and multiple production supercritical combustion gasification of deep and super-thick layer coal Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
- C01B2203/0816—Heating by flames
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The embodiment of the invention provides a method for producing hydrogen and fuel by reverse well arrangement, one injection and multiple mining of deep and ultra-thick coal through supercritical combustion gasification; the method for producing hydrogen and fuel by reverse well arrangement, one injection and multiple mining of deep and ultra-thick coal through supercritical combustion gasification comprises the following steps: arranging a gas injection well and a gas production well in a deep layer and an ultra-thick coal seam; performing blasting pressure operation at the bottom of an injection well to ensure that a gap exists in a coal bed in the range of the bottom of the well, and extracting coal bed gas in the coal bed; injecting air, oxygen and steam from a gas injection well, and keeping the formation pressure above 22.17 MPa; igniting the coal bed at the bottom of the well to enable the temperature of the coal bed to reach more than 578 ℃; the oxygen and coal are combusted to produce carbon dioxide and heat; when the combustion reaction is finished, the oxygen is completely consumed, and carbon dioxide and coal generate carbon monoxide and hydrogen under the action of heat; and discharging carbon monoxide, hydrogen and methane through the gas production well.
Description
Technical Field
The invention relates to a hydrogen production method, in particular to a method for producing hydrogen and fuel by reverse well arrangement, one injection and multiple production supercritical combustion gasification of deep and ultra-thick coal.
Background
coal gasification is one of the important forms of coal conversion, and plays a role in the beginning and the end of various production processes. The synthesis raw material gas of the coal chemical industry plays an important role in the coal chemical industry. Coal chemical industry is being developed at home and abroad into c1 chemical industry based on coal gasification, so that the coal chemical industry is changed from energy type to chemical type. Syngas (CO + H2) produced by coal gasification is continuously developed and improved in competition with petrochemical industry as a basic raw material of chemical industry.
in the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: the coal bed and the geology influence greatly, cause the gas channeling and various underground device tools of leaking water each other between the well because of high temperature deformation and the condition such as the inoperative unable operation easily: the gas components after gasification are unstable, the calorific value is low, and the like, and the type and the content of the injected gasification agent need to be changed.
disclosure of Invention
The embodiment of the invention provides a method for producing hydrogen by reverse well arrangement, one injection and multiple production of deep and ultra-thick coal through supercritical thermal cracking combustion gasification, which adopts an integral supercritical technical route well completion process route, has the advantages of stable gas components after gasification, stability between a gas production well and a gas injection well and the like, and can realize the industrial development of underground gasification.
the embodiment of the invention provides a method for producing hydrogen by one-injection multi-production supercritical combustion gasification of deep-layer and ultra-thick-layer coal in a reverse well arrangement mode, wherein the method for producing hydrogen by one-injection multi-production supercritical thermal cracking combustion gasification of the deep-layer and ultra-thick-layer coal in the reverse well arrangement mode comprises the following steps:
arranging a gas injection well and a gas production well in a deep layer and an ultra-thick coal seam;
carrying out deflagration directional operation at the bottom of an injection well to ensure that micro-crack gaps exist in the coal bed in the range of the bottom of the well, and extracting coal bed gas in the coal bed;
Injecting air, oxygen and steam from a gas injection well, and keeping the formation pressure above 22.17 MPa;
igniting the coal bed at the bottom of the well, so that the temperature of the coal bed reaches the range of 385-900 ℃; adopts an automatic steam direct injection temperature regulation method.
the oxygen and the coal are combusted to generate carbon dioxide and heat and reach a high-temperature state;
when the combustion reaction reaches the required temperature, the oxygen is completely consumed by directly injecting steam, and carbon dioxide and coal generate carbon monoxide and hydrogen under the action of heat;
The heat acts on the coal bed in the dry area to release coal bed gas; reacting carbon monoxide with hydrogen, carbon dioxide and hydrogen to produce methane;
And discharging carbon monoxide, hydrogen, methane and carbon dioxide through a gas production well.
Preferably, the technical method for producing hydrogen by reverse well arrangement, one injection and multiple production of deep and ultra-thick coal through supercritical combustion gasification is suitable for strata with a coal seam buried depth of more than 500 meters.
preferably, the technical method for producing hydrogen by reverse well distribution, one injection and multiple production of deep and ultra-thick coal by supercritical combustion gasification adopts a nine-point method to arrange a well pattern, namely four corner points of a square are formed by four adjacent gas production wells, one gas production well is arranged on the side of each square, eight gas production wells are arranged, the side length is 100 meters, and the center of the square is provided with the gas injection well.
Preferably, squares formed by a plurality of nine-point well patterns are combined to form a rectangular well pattern, and two adjacent squares share one side.
Preferably, the injection amount of the steam is calculated by the following formula:
according to the formula Qr ═ pi r2h (Pc) (Tavg-Tr)
Wherein Qr is steam injection amount in tons, R is injection radius in meters, h is formation thickness in meters, Pc is injection strength in MPa, Tavg is steam zone temperature in degrees centigrade, Tr is formation temperature in degrees centigrade, and pi is circumferential ratio.
Preferably, Qr is 800 tons to 1200 tons.
The technical scheme has the following beneficial effects: because the technical means of injecting steam, air and oxygen through the bottom of the gas injection well and igniting underground is adopted, the technical effects of stable gas components after gasification and stable gas production well and gas injection well are achieved.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top plan view of the deployment pattern of the present invention;
FIG. 2 is a perspective view of a front view of a nine point deployment pattern of the present invention;
Reference numerals: 1. a first gas recovery well; 2. a second gas recovery well; 3. a third gas recovery well; 4. a fourth gas recovery well; 5. a fifth gas recovery well; 6. a sixth gas recovery well; 7. a seventh gas recovery well; 8. an eighth gas recovery well; 9. a gas injection well; 10. a coal seam.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
the embodiment of the invention provides a method for producing hydrogen and fuel by one-injection multi-production supercritical combustion gasification in a deep-layer and ultra-thick-layer coal trans-well arrangement mode, wherein the method for producing hydrogen and fuel by one-injection multi-production supercritical combustion gasification in the deep-layer and ultra-thick-layer coal trans-well arrangement mode comprises the following steps:
Arranging a gas injection well 9 and a gas production well in the deep layer and the ultra-thick coal seam, wherein the gas injection well is used for injecting air, oxygen and steam, and a user of the gas production well produces hydrogen, carbon monoxide and methane;
performing blasting pressure operation at the bottom of the injection well to ensure that a gap exists in the coal bed in the range of the bottom of the well, and extracting coal bed gas in the coal bed 10; namely, breaking a coal bed through blasting, and extracting free coal bed gas in seams of the coal bed;
Injecting air, oxygen and steam from a gas injection well, and keeping the formation pressure above 22.17 MPa; this pressure is one of the conditions under which the following chemical reaction takes place;
Igniting the coal bed at the bottom of the well to enable the temperature of the coal bed to reach more than 578 ℃; this temperature is one of the conditions under which the following chemical reaction takes place;
The oxygen and coal are combusted to produce carbon dioxide and heat; the generated heat serves as a condition for the following chemical reaction;
When the combustion reaction is finished, the oxygen is completely consumed, and carbon dioxide and coal generate carbon monoxide and hydrogen under the action of heat, namely the reduction reaction of carbon dioxide, wherein CO 2 + C is 2 CO-162.4 MJ/kmol;
the heat acts on a coal bed in a drying area to release coal bed gas, carbon monoxide reacts with hydrogen, carbon dioxide and hydrogen to generate methane, and methanation reaction is carried out, wherein the reaction is CO +3H 2 (CH 4 + H 2 O +206.4 MJ/kmol), the reaction is 2CO +2H 2 (CH 4 + CO 2 +247.4 MJ/kmol), and the reaction is CO 2 +4H 2 (CH 4 +2H 2 O +165.4 MJ/kmol;
discharging carbon monoxide, hydrogen and methane through a gas production well; and a plurality of packers are arranged at the bottoms of the gas production well and the gas injection well and used for fire prevention.
preferably, the method for producing hydrogen and fuel by reverse well arrangement, one injection and multiple production supercritical combustion gasification of deep and ultra-thick coal is suitable for strata with coal seam burial depth of more than 800 meters; when the coal seam is buried more than 800 meters, the generated pressure is enough for the chemical reaction.
Preferably, the method for producing hydrogen and fuel by reverse well distribution, one-injection and multiple-production supercritical combustion gasification of deep and ultra-thick coal adopts a nine-point method to arrange a well pattern, namely four corner points of a square are formed by four adjacent gas production wells, one gas production well is arranged on the side of each square, eight gas production wells are formed, the side length is 100 meters, and the center of the square is a gas injection well; the well pattern is arranged, one well enters eight wells, the gas production efficiency is improved, and the utilization rate of the gas injection well is improved; the eight gas recovery wells are respectively a first gas recovery well 1, a second gas recovery well 2, a third gas recovery well 3, a fourth gas recovery well 4, a fifth gas recovery well 5, a sixth gas recovery well 6, a seventh gas recovery well 7 and an eighth gas recovery well 8.
Preferably, squares formed by a plurality of nine-point well spacing are combined to form a rectangular well pattern, and two adjacent squares share one side; the gas recovery well can share three gas recovery wells, and a plurality of gas injection wells and a plurality of gas recovery wells form a well pattern through a plurality of nine-point methods, so that the gas injection wells and the gas recovery wells can be effectively utilized, and the regional management is facilitated.
preferably, the injection amount of the superheated steam: according to the formula Qr ═ pi r2h (Pc) (Tavg-Tr)
Wherein Qr is steam injection amount in tons, R is injection radius in meters, h is formation thickness in meters, Pc is injection strength in MPa, Tavg is steam zone temperature in degrees centigrade, Tr is formation temperature in degrees centigrade, and pi is circumferential ratio. According to calculation, the requirement of steam injection is met when the Qr is 800 tons to 1200 tons, the optimal Qr is 1000 tons, the method is reasonable, the gas injection requirements of abandoned and production-stopped oil fields, ultra-heavy oil, shale oil and oil shale can be met under general conditions, and the energy and the cost are saved.
Gasifying agents (air, O 2 and H 2 O (g)) are blown in through air inlet holes, a coal layer is ignited at the air inlet side, O 2 in the gasifying agents burns when meeting coal to generate CO 2 and release a large amount of reaction heat, the combustion area is called an oxidation area, and when the concentration of O 2 in airflow is close to zero, the combustion reaction is finished and the oxidation area is finished.
oxidation reaction (combustion reaction):
C+O2＝＝CO2+393.8MJ/kmol
partial oxidation reaction of carbon (incomplete combustion reaction):
2C+O2＝＝2CO+221.1MJ/kmol
CO oxidation reaction (CO combustion reaction):
2CO+O2＝＝2CO2+570.1MJ/kmol
After the oxidation zone is completed, the coal bed in the reduction zone is in a hot state, CO 2 and hot C are reduced into CO in the reduction zone, H 2 O (g) and hot C are reduced into CO, H 2 and the like, the temperature of the coal bed and the gas flow is gradually reduced because the reduction reaction is an endothermic reaction, and the reduction zone is completed when the temperature is reduced to a weaker extent so that the reduction reaction is completed.
CO 2 reduction (producer gas reaction):
CO2+C＝＝2CO—162.4MJ/kmol
steam decomposition reaction (water gas reaction):
H2O+C＝＝H2+CO—131.5MJ/kmol
water vapor decomposition reaction:
2H2O+C＝＝2H2+CO2—90.0MJ/kmol
CO shift reaction:
CO+H2O＝＝H2+CO2+41.0MJ/kmol
And (3) hydrogenation reaction of carbon:
C+2H2＝＝CH4+74.9MJ/kmol
after the reduction zone is finished, the temperature of the airflow is still high, and the coal bed of the down-flow dry distillation drying zone is heated to release pyrolysis coal gas and generate methanation reaction. The main reaction formula is as follows:
Coal pyrolysis reaction:
Coal- -CH 4 + H 2 + H 2 O + CO + CO 2 + … …
Methanation reaction:
CO+3H2＝＝CH4+H2O+206.4MJ/kmol
2CO+2H2＝＝CH4+CO2+247.4MJ/kmol
CO2+4H2＝＝CH4+2H2O+165.4MJ/kmol
from the chemical reaction point of view, the three regions have no strict boundaries, the oxidation region and the reduction region also have the pyrolysis reaction of coal, and the division of the three regions is only the relative strength of the oxidation, reduction and pyrolysis reactions in the gasification channel. After passing through the three reaction zones, coal gas containing combustible components mainly H2, CO and CH4 is generated, and the gasification reaction zone gradually moves towards the gas outlet, so that the continuous operation of the gasification reaction process is maintained. It follows that the generation of combustible gas is mainly derived from three aspects: namely, the combustion pyrolysis of coal, the reduction of CO2 and the decomposition of water vapor, and the degree of the three functions is proportional to the reaction zone temperature and the reaction specific surface area, and also determines the composition and the calorific value of the outlet gas.
According to the thickness of the coal bed, a five-point well arrangement (a nine-point well arrangement), an injection well in the middle and four gas production wells (eight wells) on the periphery form a square well pattern with the side length of one hundred meters, and if the thickness of the coal bed is large, four gas production wells can be encrypted at the side length center point of a quadrilateral. A plurality of production units can form large-scale production.
And carrying out deflagration pressure operation at the bottom of the injection well to ensure that micro-crack gaps exist in the coal bed in the range of the bottom of the well, and the gas producing well can produce coal bed gas at the moment. And then igniting the bottom of the injection well, igniting the coal bed, simultaneously injecting oxygen-enriched gas, injecting steam after meeting, adjusting the temperature to enable the temperature of the coal bed to reach the supercritical temperature (578 ℃) of water, simultaneously injecting air to keep the formation pressure to be more than 22.17 MPa (less than the formation fracture pressure), enabling the near-well coal bed to reach the supercritical state of water, enabling the steam to react with the coal to generate hydrogen and other effective gases, and enabling the gas-producing body to move in the direction of a peripheral gas-producing well due to the pure pressure difference and cracks, and then extracting the gas from a production well.
the above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for producing hydrogen and fuel by one-injection multi-production supercritical combustion gasification of deep-layer and ultra-thick-layer coal in a reverse well arrangement mode is characterized by comprising the following steps:
arranging a gas injection well and a gas production well in a deep layer and an ultra-thick coal seam;
Performing blasting pressure operation at the bottom of an injection well to ensure that a gap exists in a coal bed in the range of the bottom of the well, and extracting coal bed gas in the coal bed;
Injecting air, oxygen and steam from a gas injection well, and keeping the formation pressure above 22.17 MPa;
igniting the coal bed at the bottom of the well to enable the temperature of the coal bed to reach more than 578 ℃;
The oxygen and coal are combusted to produce carbon dioxide and heat;
When the combustion reaction is finished, the oxygen is completely consumed, and carbon dioxide and coal generate carbon monoxide and hydrogen under the action of heat;
The heat acts on the coal bed in the dry area to release coal bed gas; reacting carbon monoxide with hydrogen, carbon dioxide and hydrogen to produce methane;
and discharging carbon monoxide, hydrogen and methane through the gas production well.
2. The method for producing hydrogen and fuel by one-injection multi-production supercritical combustion gasification in a deep-layer coal and ultra-thick-layer coal trans-well-distribution manner according to claim 1, wherein the method for producing hydrogen and fuel by one-injection multi-production supercritical combustion gasification in a deep-layer coal and ultra-thick-layer coal trans-well-distribution manner is suitable for strata with a coal seam burial depth of more than 800 meters.
3. The method for producing hydrogen and fuel by the supercritical combustion gasification with one injection and multiple extraction of the deep-layer and ultra-thick-layer coal in a reverse well arrangement mode according to claim 1, wherein a well pattern is arranged by a nine-point method, namely four corner points of a square are formed by four adjacent gas production wells, one gas production well is arranged on the side of each square, eight gas production wells are arranged on the total side, the side length is 100 meters, and the center of the square is a gas injection well.
4. The method for producing hydrogen and fuel by supercritical combustion and gasification of deep and ultra-thick coal through reverse well arrangement and injection and multiple mining according to claim 1, wherein squares formed by multiple nine-point well arrangement are combined to form a rectangular well pattern, and two adjacent squares share one side.
5. The method for producing hydrogen and fuel by supercritical combustion gasification of deep-layer and ultra-thick-layer coal through reverse well arrangement and one-injection multi-extraction according to claim 1, wherein the injection amount of steam is calculated by the following formula when the injection amount of steam meets the set requirement:
according to the formula Qr ═ pi r 2 h (Pc) (Tavg-Tr)
wherein Qr is steam injection amount in tons, R is injection radius in meters, h is formation thickness in meters, Pc is injection strength in MPa, Tavg is steam zone temperature in degrees centigrade, Tr is formation temperature in degrees centigrade, and pi is circumferential ratio.
6. The method for producing hydrogen and fuel by supercritical combustion and gasification of deep and ultra-thick coal through reverse well arrangement and multiple production according to claim 5, wherein Qr is 800-1200 tons.
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| CN112302598A (en) * | 2020-11-20 | 2021-02-02 | 西南石油大学 | System and method for generating steam underground in ultra-deep heavy oil reservoir |
| CN112761604A (en) * | 2021-01-18 | 2021-05-07 | 栾海涛 | Method for producing hydrogen and displacing oil by injecting supercritical steam and liquid oxygen into super heavy oil |
| CN113073967A (en) * | 2021-03-15 | 2021-07-06 | 山东科技大学 | Channel arrangement mode for coal bed in-situ conversion hydrogen production and hydrogen production method |
| CN114215601A (en) * | 2021-12-31 | 2022-03-22 | 北京派创石油技术服务有限公司 | Method for producing hydrogen by using waste oil well |
| CN114876437A (en) * | 2022-05-08 | 2022-08-09 | 太原理工大学 | Coal bed in-situ hydrogen production method utilizing supercritical water |
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