CN106640028A - Completion method of enhanced geothermal system through communication and circulation of two wells - Google Patents
Completion method of enhanced geothermal system through communication and circulation of two wells Download PDFInfo
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- CN106640028A CN106640028A CN201710132947.1A CN201710132947A CN106640028A CN 106640028 A CN106640028 A CN 106640028A CN 201710132947 A CN201710132947 A CN 201710132947A CN 106640028 A CN106640028 A CN 106640028A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004891 communication Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 135
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- 230000001681 protective effect Effects 0.000 claims description 55
- 230000005611 electricity Effects 0.000 abstract description 7
- 239000012774 insulation material Substances 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- 238000011161 development Methods 0.000 description 15
- 238000005553 drilling Methods 0.000 description 8
- 238000012546 transfer Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T2010/50—Component parts, details or accessories
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
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Abstract
The invention relates to a completion method of an enhanced geothermal system through communication and circulation of two wells. The completion method is characterized in that when being injected into a water injection well, water is subjected to low-efficiency heat exchange in a straight well section of the water injection and then enters a geothermal reservoir along a horizontal heat collection well, and the water is subjected to sufficient and high-efficiency heat exchange with the geothermal reservoir through a high-temperature-resistant casing pipe and then enters a heat extracting well; high-temperature hot water passes through a heat-insulating protective layer formed by an intermediate casing with the interior and exterior coated with a thermal insulation material in the heat extracting well and then extracted out of the ground, and the extracted hot water is used for generating electricity.
Description
Technical field
The present invention relates to underground heat production technique field, and in particular to a kind of two wells communication loop enhancement mode geothermal system completion
Method.
Background technology
Resource and environment is the primary condition that the mankind depend on for existence, multiply and develop, and resource environment is with sustainable development
Become the significant problem of mankind's facing.Since a nearly century, global population increases 2 times, the energy and natural money
The consumption in source increases 10 times, and the utilization to non-renewable energy resources has been well beyond the ability that environment can bear, air
Pollution and global warming seriously threaten the living environment of the mankind, geothermal energy resources as a kind of regenerative resource of cleanliness without any pollution,
In today that people's environmental consciousness is increasingly stronger, also receive more and more attention.
Geothermal energy resources are referred under current techniques economy and geological conditions, can be from earth's crust internal medicine, reasonably open
The useful constituent of the heat in heat, geothermal fluid and its association in the High temperature rocks for issuing.The earth is one huge
Thermal store, from ground, more down temperature is higher, and normal geothermal gradient is that every 1000m increases by 20 DEG C or so, when surface temperature is 10
DEG C when, in the case of normal geothermal gradient, formation temperature is about 90 DEG C at the 4000m of underground.Due to constructing reason, the whole world is differently
The geothermal gradient difference in area is larger so that the formation temperature difference of the same depth of different regions is larger, the ground temperature of some areas
Gradient just forms high-temperature geothermal reservoir when being more than normal geothermal gradient, there are many area formation temperatures at the 4000m of underground in the whole world
Abnormal high temperature geothermal reservoir is formed more than 200 DEG C, the energy storage stores very high heat, i.e. referred to as geothermal energy.China ground
Thermal resource enriches, and market potential is huge, and development prospect is wide.Speeding up development using geothermal energy resources not only to readjusting the energy structure,
Energy-saving and emission-reduction, to improve environment significant.To implement《Renewable Energy Law》, according to《Renewable Energy Development " 13
Five " plan》, formulate《Geothermal energy development utilizes " 13 " planning》, plan and elaborate the guidance side that geothermal energy development is utilized
Pin and target, key task, great layout, and the safeguard of planning implementation etc., the planning is " 13 " period China
The basic foundation that geothermal energy development is utilized.
Geothermal energy is divided into hot water type underground heat and xeothermic lithotype underground heat, and hot water type underground heat is that have high-temperature-hot-water in subsurface reservoir,
It is High temperature rocks that xeothermic lithotype underground heat is subsurface reservoir, and the world exploits at present and is mainly hot water type underground heat using geothermal energy resources,
I.e. from ground drilling to high-temperature geothermal reservoir, then geothermal water is produced ground to generate electricity, xeothermic lithotype is from ground by water
Be injected into underground, by contacting with High temperature rocks after absorb heat water body, then high temperature water body return and be discharged to ground to generate electricity,
The system is referred to as enhancement mode geothermal system, Future potentiality it is bigger be xeothermic lithotype underground heat exploitation, i.e. enhancement mode underground heat
Electricity generation system.
The existing development scheme of enhancement mode geothermal system is：In the area with geothermal energy reservoir, on ground at a distance of 1000
Then two positions of rice carry out pressure break, by reservoir simultaneously to two mouthfuls of wells of underground drilling in the underground geothermal reservoir position of Liang Koujing
Rock is pressed into crack, and the crack connection of two mouthfuls of well pressure breaks is connected in two mouthfuls of wells by the crack of pressure break in underground, then passes through
Ground high-pressure pump is betted normal-temperature water from wherein a bite well to ground, and water is by temperature reservoirs flow in fracture, while heat is absorbed, then
Hot water is generated electricity from another mouthful of well extraction to ground.But the deficiency that the system is present is：Bore needs to carry out pressure break after two mouthfuls of wells,
The pressure break expense of 1000m length probably needs 6,000,000, and the somewhat expensive of pressure break increased development cost.
Analysis based on more than, the development cost of geothermal energy is high, if it is possible to research and develop it is a set of only need to bung down it is same
When do not need pressure break mode just can mining geothermal energy technology, development cost can be substantially reduced.Analyze based on more than, the present invention is specially
Profit devises a kind of two wells communication loop enhancement mode geothermal system completion method, it is intended to fills up China and unifies in enhancement mode geothermal system
The vacancy of two well communication loop enhancement mode geothermal system completion methods is planted, compared with existing development scheme, the system only needs to bore
Two mouthfuls of well head wells are docked, and by the circulation of water body geothermal energy is absorbed, and are reduced by the design of the development system
Geothermal energy development cost, to realize safe efficient, sustainable, the inexpensive development and utilization to geothermal energy.
The content of the invention
It is an object of the invention to developing into well for enhancement mode geothermal system provides a kind of two wells communication loop enhancement mode ground
Hot systems completion method, to improve high efficiency, safety, the sustainability of exploitation of geothermal resource.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
A kind of two well communication loop enhancement mode geothermal system completion methods, mainly by water injection well and water acquisition well construction, by noting
Well, water acquisition well connect to form U-shaped casing programme, water acquisition well well type be straight well, water injection well well type be horizontal well, water injection well well bore
Structure includes straight well section and horizontal segment；Before drilling well, need to be selected at a distance of 2000m's on previously selected geothermal reservoir top
2 points, as water injection well, the geographical coordinates of water acquisition well；Then to underground subdrilling a bite water acquisition well to geothermal reservoir, note is then bored
Well, in water injection well drilling process, is first drilled to straight well section, and straight well section is reached in geothermal reservoir, then bores horizontal segment, until boring
To position of the water acquisition well in geothermal reservoir, the horizontal segment of water injection well drills the straight well section of water acquisition well, realizes the connection of two mouthfuls of wells,
Horizontal section length is 2000m.Bore before water injection well horizontal segment in geothermal reservoir, need for magnetic steering instrument to be lowered into water injection well
Straight well section bottom, the magnetic steering instrument plays a part of orientation, that is, guide to be bored in water injection well horizontal segment drilling process and meet water acquisition well
Position in geothermal reservoir.
U-shaped casing programme is formed after water injection well, the connection of water acquisition well, then normal-temperature water is injected from water injection well, water is from water injection well
Straight well section protective casing stream is to horizontal segment protective casing, because horizontal segment protective casing is in geothermal reservoir, geothermal reservoir heat
Endlessly it is delivered in protective casing, heat is absorbed when water flows in the horizontal segment protective casing and becomes high-temperature water, so
Afterwards then high-temperature water carries out sending out from horizontal segment protective casing stream to water acquisition well protective casing from water acquisition well protective casing stream to ground
Electricity.
Heretofore described water injection well horizontal segment protective casing size is more than water acquisition down-hole portion protective casing size, the design
Water injection well horizontal segment protective casing size is larger, and water flowing velocity in large-sized horizontal segment protective casing is slower, and water is in institute
The flowing time stated in protective casing is longer, i.e. the time of water absorption geothermal reservoir heat is just longer, and heat transfer effect is more preferable, water
Temperature becomes higher, and it is more preferable that hot water reaches generating efficiency behind ground.
Heretofore described water acquisition well protective casing is divided into top protective casing and bottom protective casing, and water acquisition down-hole portion
Protective casing is smaller in size than water acquisition well top protective casing size, be because high-temperature-hot-water in water acquisition well protective casing from it is lower to
During upper flowing, due to pressure action, the pressure of water is big in the pressure ratio top protective casing of water in water acquisition down-hole portion protective casing,
Because the three-phase of water is determined by the temperature and pressure of water, when the timing of temperature one of water, the pressure that water is subject to is when larger
Liquid, is changed into gaseous state when reverse pressure is less, therefore, when the high-temperature-hot-water in water acquisition well protective casing is at the protective casing of bottom
Pressure is big, is liquid, and pressure is little when at the protective casing of top, and aqueous water becomes gaseous state.It is swollen that aqueous water becomes volume after gaseous state
It is swollen, pressure increase, it is possible to the protective casing for ruining top can be squeezed, ruined in order to avoid well top protective casing is not squeezed, so
Increase top protective casing size, buffering aqueous water becomes the pressure that volumetric expansion after gaseous state brings.
Water injection well straight well section protective casing is different from water injection well horizontal segment protective casing size, can be formed in the reducer
Current are hoarded, and to water Liu Jin row bufferings, can will not inject air etc. miscellaneous on the premise of ensureing that injection flow, pressure are constant
Matter, air takes heat transfer space in water injection well horizontal segment protective casing, affects heat-transfer effect.
Description of the drawings
Accompanying drawing 1 is cross-sectional view of the invention.
1 water injection well straight well section, 2 water injection well horizontal segments, 3 water acquisition wells, 4 water injection well surface pipes, 5 water injection well straight well section technologies
Sleeve pipe, 6 water injection well horizontal segment protective casings, 7 water acquisition well top protective casings, 8 water acquisition down-hole portion protective casings, 9 water acquisition well tables
Layer sleeve pipe.
Specific embodiment
Below in conjunction with accompanying drawing 1, the present invention is described in detail, it is as follows：
The main 1 water injection well straight well section of two well communication loop enhancement mode geothermal system completion methods of one kind, 2 water injection well levels
Section, 3 water acquisition wells, 4 water injection well surface pipes, 5 water injection well straight well section protective casings, 6 water injection well horizontal segment protective casings, 7 water acquisitions
Well top protective casing, 8 water acquisition down-hole portion protective casings, 9 water acquisition well surface pipes composition.
The present invention is in the case of the parameter determinations such as geothermal reservoir geographical position, orientation, depth, on geothermal reservoir top
Bore a bite straight well first, as water acquisition well 3, the well type of water acquisition well 3 is straight well, is spudded in first by 374.4mm drill bits, under enter
272.8mm surface pipes 9 and cementing well, it is therefore an objective to isolate top layer complicated geological structure；Then using the resistance to height of 250.6mm
Warm drill bit is drilled into geothermal reservoir, and large-sized water acquisition well top protective casing 7 and undersized water acquisition down-hole portion skill are then entered down
Art sleeve pipe 8, and shunt in a well after cementing well.
During water injection well drilling well, water injection well straight well section 1 gets into geothermal reservoir, and the well type of water injection well is horizontal well, is sequentially note
Well straight well section 1, water injection well horizontal segment 2, using horizontal well technology pit shaft and stratum heat exchange area, water filling well water can be fully increased
The length of flat section 2 is more than 2000m.During 1 drilling well of water injection well, spud in first by 444.2mm drill bits, subsequently under enter 406.1mm
Water injection well surface pipe 4 and cementing well, isolate stratum top layer complicated geological structure；Secondly it is drilled into using 374.4mm drill bits
Geothermal reservoir kickoff point (KOP), under enter water injection well straight well section protective casing 5 and cement the well；Subsequently using 250.6mm drill bits and high temperature resistant magnetic
Guide instrument directional inclination.
Water injection well straight well section protective casing 5 is different from water injection well horizontal segment 6 sizes of protective casing, is formed in the reducer
Current are hoarded, and to water Liu Jin row bufferings, can will not inject the impurity such as air on the premise of flow, pressure is ensured, air exists
Heat transfer space is taken in water injection well horizontal segment protective casing 6, heat-transfer effect is affected.
When boring water injection well horizontal segment 2, it is oriented by high temperature resistant magnetic steering instrument, real-time control drill bit is in geothermal reservoir
The direction of middle drilling, until water injection well horizontal segment 2 reaches position of the water acquisition well 3 in geothermal reservoir, water injection well horizontal segment 2 is bored
Water acquisition down-hole portion protective casing 8 is worn, the connection of two mouthfuls of wells is realized.
A kind of two well communication loop enhancement mode geothermal system completion methods by injecting normal-temperature water from water injection well straight well section 1,
Water is flowed to water injection well horizontal segment protective casing 6 from water injection well straight well section protective casing 5, because water injection well horizontal segment protective casing 6
In geothermal reservoir, geothermal reservoir heat is endlessly delivered to water injection well horizontal segment protective casing 6, and water is in water injection well level
Heat being absorbed in section protective casing 6 during flowing and becoming high-temperature water, then high-temperature water is flowed to adopting from water injection well horizontal segment protective casing 6
Well bottom protective casing 8, then high temperature flow to ground from water acquisition well top protective casing 7 and generated electricity.
Claims (3)
1. a kind of two wells communication loop enhancement mode geothermal system completion method, it is characterised in that：Completion casing programme by water injection well,
Water acquisition well connects the U-shaped casing programme to be formed；The water injection well described in geothermal reservoir is bored before horizontal segment, by under magnetic steering instrument
Enter to water injection well well section bottom and be oriented.
2. a kind of two wells communication loop enhancement mode geothermal system completion method according to claim 1, it is characterised in that：Institute
Water injection well horizontal segment protective casing size is stated more than water acquisition down-hole portion protective casing size.
3. a kind of two wells communication loop enhancement mode geothermal system completion method according to claim 1, it is characterised in that：Institute
State water acquisition down-hole portion protective casing and be smaller in size than water acquisition well top protective casing size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710132947.1A CN106640028A (en) | 2017-03-06 | 2017-03-06 | Completion method of enhanced geothermal system through communication and circulation of two wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710132947.1A CN106640028A (en) | 2017-03-06 | 2017-03-06 | Completion method of enhanced geothermal system through communication and circulation of two wells |
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| CN106640028A true CN106640028A (en) | 2017-05-10 |
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| CN201710132947.1A Pending CN106640028A (en) | 2017-03-06 | 2017-03-06 | Completion method of enhanced geothermal system through communication and circulation of two wells |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192151A (en) * | 2017-05-21 | 2017-09-22 | 庄永林 | Scrap oil-water well underground high heat rock mass heating combined equipment and its heating method in oil field |
| CN107575159A (en) * | 2017-08-07 | 2018-01-12 | 青海九0六工程勘察设计院 | Heat-exchange tube mounting process in a kind of geothermal well well |
| CN107642914A (en) * | 2017-11-02 | 2018-01-30 | 北京泰利新能源科技发展有限公司 | Thermal cycle utilizes system |
| CN107642329A (en) * | 2017-11-14 | 2018-01-30 | 中国煤炭地质总局水文地质局 | A kind of process of the U-shaped docking geothermal well casings pipeline sealing operation of mid-deep strata |
| CN108222831A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | Multidirectional geothermal well and high-efficiency mining hot dry rock method |
| CN108756747A (en) * | 2018-05-11 | 2018-11-06 | 中国石油大学(北京) | Enhanced geothermal system construction method based on magnetic steering and device |
| CN109505580A (en) * | 2019-01-17 | 2019-03-22 | 东北大学 | A kind of radial well low temperature underground heat recovery method |
| CN110952928A (en) * | 2019-09-27 | 2020-04-03 | 中煤科工集团西安研究院有限公司 | Well completion device and method for efficiently developing and utilizing hot dry rock |
| CN111456720A (en) * | 2020-03-24 | 2020-07-28 | 中国地质科学院勘探技术研究所 | Heat exchange isolation mining method for geothermal communication well |
| CN111520110A (en) * | 2019-02-02 | 2020-08-11 | 中国石油天然气股份有限公司 | Supercritical CO of horizontal well2Method and system for developing enhanced geothermal energy by fracturing |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192151A (en) * | 2017-05-21 | 2017-09-22 | 庄永林 | Scrap oil-water well underground high heat rock mass heating combined equipment and its heating method in oil field |
| CN107575159A (en) * | 2017-08-07 | 2018-01-12 | 青海九0六工程勘察设计院 | Heat-exchange tube mounting process in a kind of geothermal well well |
| CN107642914B (en) * | 2017-11-02 | 2023-11-21 | 北京泰利新能源科技发展有限公司 | Geothermal recycling system |
| CN107642914A (en) * | 2017-11-02 | 2018-01-30 | 北京泰利新能源科技发展有限公司 | Thermal cycle utilizes system |
| CN107642329A (en) * | 2017-11-14 | 2018-01-30 | 中国煤炭地质总局水文地质局 | A kind of process of the U-shaped docking geothermal well casings pipeline sealing operation of mid-deep strata |
| CN108222831A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | Multidirectional geothermal well and high-efficiency mining hot dry rock method |
| CN108756747A (en) * | 2018-05-11 | 2018-11-06 | 中国石油大学(北京) | Enhanced geothermal system construction method based on magnetic steering and device |
| CN109505580A (en) * | 2019-01-17 | 2019-03-22 | 东北大学 | A kind of radial well low temperature underground heat recovery method |
| CN111520110A (en) * | 2019-02-02 | 2020-08-11 | 中国石油天然气股份有限公司 | Supercritical CO of horizontal well2Method and system for developing enhanced geothermal energy by fracturing |
| CN111520110B (en) * | 2019-02-02 | 2022-06-03 | 中国石油天然气股份有限公司 | Supercritical CO of horizontal well2Method and system for developing enhanced geothermal energy by fracturing |
| CN110952928B (en) * | 2019-09-27 | 2022-02-01 | 中煤科工集团西安研究院有限公司 | Well completion device and method for efficiently developing and utilizing hot dry rock |
| CN110952928A (en) * | 2019-09-27 | 2020-04-03 | 中煤科工集团西安研究院有限公司 | Well completion device and method for efficiently developing and utilizing hot dry rock |
| CN111456720A (en) * | 2020-03-24 | 2020-07-28 | 中国地质科学院勘探技术研究所 | Heat exchange isolation mining method for geothermal communication well |
| CN111456720B (en) * | 2020-03-24 | 2023-05-23 | 中国地质科学院勘探技术研究所 | Heat exchange isolation exploitation method for geothermal communication well |
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