CN108222831A - Multidirectional geothermal well and high-efficiency mining hot dry rock method - Google Patents
Multidirectional geothermal well and high-efficiency mining hot dry rock method Download PDFInfo
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- CN108222831A CN108222831A CN201810006014.2A CN201810006014A CN108222831A CN 108222831 A CN108222831 A CN 108222831A CN 201810006014 A CN201810006014 A CN 201810006014A CN 108222831 A CN108222831 A CN 108222831A
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- 239000011435 rock Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005065 mining Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000002347 injection Methods 0.000 claims abstract description 58
- 239000007924 injection Substances 0.000 claims abstract description 58
- 238000004064 recycling Methods 0.000 claims abstract 2
- 238000005516 engineering process Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 235000020188 drinking water Nutrition 0.000 claims description 10
- 239000003651 drinking water Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000002459 sustained effect Effects 0.000 claims description 3
- 238000009834 vaporization Methods 0.000 claims description 3
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- 230000009471 action Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 5
- 235000020681 well water Nutrition 0.000 abstract description 3
- 239000002349 well water Substances 0.000 abstract description 3
- 239000012736 aqueous medium Substances 0.000 abstract 1
- 239000002609 medium Substances 0.000 abstract 1
- 238000003032 molecular docking Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
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- 230000007797 corrosion Effects 0.000 description 2
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000005338 heat storage Methods 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
-
- 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
- E21B7/06—Deflecting the direction of boreholes
-
- 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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Abstract
The present invention relates to dry-hot-rock geothermal resource exploitation fields, disclose a kind of multidirectional geothermal well and high-efficiency mining hot dry rock method.This method applies U-shaped linker principle, and the more wells of individual well water filling exploit geothermal energy resources simultaneously.Producing well casing programme includes vertical section, inclination section and horizontal segment, water injection well is made to be connected with producing well in the realization of multiple reservoirs using target spot docking technique.Water injection well only carries out water injection work, producing well can be collected simultaneously steam and high-temperature water, the underground heat mining system not only increases working medium storage capacity, the underground space is made full use of to conduct heat to meet ground heat demand, key city and satellite town's energy coordination utilization, recycling for aqueous medium is realized simultaneously, is economized on resources and space.
Description
Technical field
The invention belongs to underground heat to exploit field, more particularly to a kind of dry-hot-rock geothermal well construction and recovery method.
Background technology
In future source of energy development field, geothermal energy increasingly becomes a kind of extremely competitive renewable resource.With
Era development, traditional fossil energy pollution environment, it is deficient the problems such as getting worse.Develop and make full use of emerging cleaning can be again
The raw energy is that world situation is become, and is needed for national development.Also it is in response to great heat such as " global warming " " energy-saving and emission-reduction " simultaneously
The behave of point problem, the practical problem currently faced to solution have important practical significance.
Hot dry rock is also referred to as " enhanced geothermal system ", and general temperature is more than 200 DEG C, and the thousands of rice of buried depth, there is no streams for inside
Body or the high heat rock mass there is only minute quantity fluid.From China's area distribution, southern Qinghai-Tibet Plateau accounts for China's Mainland
The 20.5% of regional hot dry rock total resources, temperature also highest；Secondly North China (Fen Weihe of the edge of south containing East Ordos Basin
Moat) and southeastern coast Mesozoic Magmatic Activities area (Zhejiang, Fujian, Guangdong), the 8.6% and 8.2% of total amount is accounted for respectively；Northeast
(Song-liao basin) accounts for 5.2%；Western Yunnan hot dry rock temperature is higher, but limited area, accounts for the 3.8% of total resources.Through domestic special
Family's science measuring and calculating, 3 to 10 km depths hot dry rock resource of China's Mainland add up to 2.09 × 107EJ, close 7.149 × 1014 tons of marks
Quasi- coal, higher than continental United States (being free of Yellowstone) dry-hot-rock geothermal resource (4 × 107EJ).If based on 2% Allowable exploitation quantity
It calculates, is equivalent to 4400 times of China's Mainland energy consumption total amount in 2010.With the progress of exploration and development technology, reasonable development with
It can be particularly important using dry-hot-rock geothermal, the exploitation of deep geothermal can not only optimize existing energy resource structure
Recombination also further solves the practical problems such as the electricity consumption heating of plateau remote districts.
Hot dry rock resource buries depth, and porosity and permeability is minimum.But the development technique of current high temperature geothermal energy resources is still
Prematurity mainly passes through toward underground transportation work medium --- and water extracts geothermal energy resources.For opening for current underground heat field
The methods of adopting technology, there is pure artificial fracturing, intrinsic fracture-artificial fracturing, individual well exploitation and Multilateral Wells is exploited.Most of underground heat
Well construction is " individual well is applied alone ", " one area of a well ".Based on the high efficiency of hot dry rock resource, in following using energy source, " individual well
Be applied alone ", the development mode in " one area of a well " will be difficult to meet low-carbon environment-friendly specification of the national energy using planning again.Pass through science
Data analysis, although the application of volume fracturing technology improves geothermal energy resources harvesting utilization rate to a certain extent, due to pressure
The scrambling of rock seam is split, the rock seam efficiently used is less, and heat storage difficulty is larger, working medium is caused to be lost in serious.Due to working medium with
Rock is in direct contact, cause rock stratum fouling, corrosion etc. can not inverse problem, realize that the Efficient Development of the hot dry rock energy great is chosen
War property.
Based on problem above, the present invention proposes a kind of structure and method of multidirectional high-efficiency mining dry-hot-rock geothermal well, profit
With the construction of multiple U-shaped horizontal branch wells, extracted from different Btu utilization points.The design of this underground heat well construction increases
Big hot storage capacity, enough steam powers and high temperature refrigerant are provided for the multiple Btu utilization points in ground.Pass through working media
Multistage flow fully absorbs rock stratum heat, so as to substantially increase the utilization of underground heat.This solution avoids artificial fracturing technologies to make
Into working medium be lost in, poor efficiency problem, to the dry-hot-rock geothermal energy utilization have important directive function, be conducive to
Push China's regenerative resource industrial expansion.
Invention content
The purpose of the present invention：In order to improve the efficient utilization of geothermal energy resources, the work(of " well is mostly used ", " more cities are same to be taken " is realized
Can, the problems such as working medium caused by overcoming conventional-volume fracturing technique is lost in, and geothermal utilization efficiency is low.
In order to achieve the above objectives, the present invention takes the technical solution to be：
Multidirectional geothermal well and high-efficiency mining hot dry rock method, the specific steps are,
(1) by science geology detecting, hot dry rock reservoir position, underground area coverage are determined, it is reasonable to choose water injection well
Position；
(2) water injection well addressing is measured the distance between to periphery satellite city, respectively the selection producing well at multiple satellite cities
Position；
(3) water injection well and producing well carry out completion after creeping into above hot dry rock reservoir, and completion is using heat preservation low heat transfer
Coefficient production technology casing；
(4) continue drilling after water injection well completion to hot dry rock reservoir distance below, place RMRS in shaft bottom and determine
Position instrument, the magnetic field signal of transmitting, which is used as, drills through producing well horizontal segment target center；
(5) production casing programme is divided into vertical section, inclination section, horizontal segment；Producing well first carries out deflecting, then carries out horizontal brill
Into, the target center in RMRS location instruments searching step (4) is installed on drill bit, until water injection well connection, and use high thermal conductivity coefficient
Production technology casing carries out completion；
(6) water injection well continues to be drilled down into certain distance, and RMRS location instruments, the magnetic field signal of transmitting are placed in shaft bottom
As drilling through the second reservoir target center；
(7) producing well continues to be drilled down into vertical section, by deflecting again and horizontal drilling, until the second reservoir target
The heart makes water injection well be connected with producing well in the second reservoir, and uses high thermal conductivity coefficient production technology cased hole completion；
(8) step (6), (7) are repeated, water injection well and producing well is completed and is connected simultaneously completion in third reservoir；
(9) similarly, step (6), (7) can be repeated several times, water injection well can be completed with producing well in the four, 5th etc. multiple storages
The connection of thermosphere；
(10) tripping in water injection pipe in water injection well, and above the first reservoir at a certain distance from annular space in packer is installed
Structure prevents steam from being overflowed from annular space；
(11) tripping in drinking-water pipe is to reservoir horizontal segment in producing well respectively, and drinking-water pipe is at away from ground 2.5m across guarantor
Warm low heat transfer coefficient production technology casing turning water conservancy diversion；
(12) sustained water injection into water injection well, and flowed into producing well direction around, under hot dry rock high temperature action, water becomes
It for steam, is overflowed from the annular space of producing well and utilization is collected on ground, the high-temperature water water for failing vaporization can be from drinking-water pipe
In be pumped into ground and carry out the mode of heating etc. and utilized；
(13) steam and high-temperature water can be delivered to water injection well after utilizing by ground installation and reinject underground, realize water again
It recycles.
Entire pit shaft is tree, and centre is water injection well, and surrounding is multiple producing wells, and each producing well exists with water injection well
U-shaped linker structure is formed at multiple reservoirs or the different well depths on same stratum.
The water injection rate of water injection well is codetermined according to Multiple factors such as the quantity, hot dry rock temperature, user demand of producing well.
The invention has the advantages that：1st, the present invention is designed using Multi-layer U-shape well construction, forms the heat of large area
Storage cavern improves working medium reserves, can continuously generate heat.2nd, the present invention is compared with routinely exploiting hot dry rock resource, using one
Mouth well water filling, more mouthfuls of producing well cooperating syringes improve heat utilization ratio, are conducive to the geothermal energy resources synthesis profit of satellite town
With.3rd, the present invention is improved and is passed between working medium and rock stratum using high thermal conductivity coefficient technology production casing in hot dry rock heat reservori
The thermal efficiency also avoids the problem of working medium is lost in, crack connects bad, rock stratum corrosion and fouling.
Description of the drawings
Fig. 1 is casing programme schematic diagram of the present invention.
Fig. 2 is well bore sectional view of the present invention.
In figure：1. water injection pipe, 2. water injection wells, 3. packer constructions, 4. earth's surfaces, 5. producing wells, 6. drinking-water pipes, 7. first storages
Thermosphere, 8. second reservoirs, 9. third reservoirs, 10. hot dry rock reservoirs, 11. high thermal conductivity coefficient production technology casings, 12. protect
Warm low heat transfer coefficient production technology casing.
Specific embodiment
The present invention is not limited by following embodiments, can be determined according to the technique and scheme of the present invention with actual conditions
Specific embodiment.
As depicted in figs. 1 and 2, multidirectional geothermal well and high-efficiency mining hot dry rock method, specific step be,
(1) by science geology detecting, position, the underground area coverage of hot dry rock reservoir 10 are determined, water injection well 2 is chosen and closes
Manage position；
(2) 2 addressing of water injection well is measured the distance between to periphery satellite city, respectively the selection producing well at multiple satellite cities
5 positions；
(3) water injection well 2 and producing well 5 carry out completion after creeping into 10 top of hot dry rock reservoir, and completion is using the low biography of heat preservation
Hot coefficient production technology casing 12；
(4) continue drilling after 2 completion of water injection well to 10 distance below of hot dry rock reservoir, place RMRS in shaft bottom and determine
Position instrument, the magnetic field signal of transmitting, which is used as, drills through 5 first reservoir of producing well, 7 horizontal segment target center；
(5) 5 body structure of producing well is divided into vertical section, inclination section, horizontal segment；Producing well 5 first carries out deflecting, then carries out level
It creeps into, installation RMRS location instruments find the target center in step (4) on drill bit, until water injection well 2 connects, and use high heat conduction system
Number production technology casing 11 carries out completion；
(6) water injection well 2 continues to be drilled down into certain distance, and RMRS location instruments, the magnetic field letter of transmitting are placed in shaft bottom
Number conduct drills through 8 target center of the second reservoir；
(7) producing well 5 continues to be drilled down into vertical section, by deflecting again and horizontal drilling, until the second reservoir 8
Target center makes water injection well 2 be connected with producing well 5 in the second reservoir 8, and using 11 completion of high thermal conductivity coefficient production technology casing；
(8) step (6), (7) are repeated, water injection well 2 and producing well 5 is completed and is connected simultaneously completion in third reservoir 9；
(9) similarly, step (6), (7) can be repeated several times, it is multiple the four, 5th etc. with producing well 5 that water injection well 2 can be completed
The connection of reservoir；
(10) tripping in water injection pipe 1 in water injection well 2, and above the first reservoir 7 at a certain distance from annular space in envelope is installed
Every device structure 3, prevent steam from being overflowed from annular space；
(11) tripping in drinking-water pipe 6 is to reservoir horizontal segment in each producing well 5 respectively, and drinking-water pipe 6 is at away from ground 2.5m
Across the heat preservation turning water conservancy diversion of low heat transfer coefficient production technology casing 12；
(12) sustained water injection into water injection well 2, and flowed into 5 direction of producing well around, make in 10 high temperature of hot dry rock reservoir
Under, water becomes steam, is overflowed from the annular space of producing well and is collected utilization on ground 4, and the high-temperature water for failing vaporization can
It ground is pumped into from drinking-water pipe carries out the mode of heating etc. and utilized；
(13) steam and high-temperature water can be delivered to water injection well after utilizing by ground installation and reinject underground, realize water again
It recycles.
As shown in Figure 1, the pit shaft of multidirectional geothermal well is tree, centre is water injection well, and surrounding is multiple producing wells, respectively
A producing well forms U-shaped linker structure from water injection well at the different well depths on multiple reservoirs or same stratum；Water injection well
Water injection rate according to the Multiple factors such as the quantity, hot dry rock temperature, user demand of producing well codetermine.
Herein, the involved noun of locality is the relative position between each structure in scheming to define, and is intended merely to table
Up to the clear of technical solution and conveniently, it should be understood that the use of the noun of locality should not limit the claimed range of the application.Place
Within the spirit and principles in the present invention, any modification for being made, replacement etc., within the scope of the present invention.
Claims (3)
1. multidirectional geothermal well and high-efficiency mining hot dry rock method, it is characterised in that：Its specific step is,
(1) by science geology detecting, hot dry rock reservoir position, underground area coverage are determined, chooses water injection well rational position；
(2) water injection well addressing is measured the distance between to periphery satellite city, respectively the selection producing well position at multiple satellite cities；
(3) water injection well and producing well carry out completion after creeping into above hot dry rock reservoir, and completion is using heat preservation low heat transfer coefficient
Production technology casing；
(4) continue drilling after water injection well completion to hot dry rock reservoir distance below, RMRS position indicators are placed in shaft bottom
Device, the magnetic field signal of transmitting, which is used as, drills through producing well the first reservoir horizontal segment target center；
(5) production casing programme is divided into vertical section, inclination section, horizontal segment；Producing well first carries out deflecting, then carries out horizontal drilling,
Target center in RMRS location instruments searching step (4) on drill bit is installed, until water injection well connects, and is produced using high thermal conductivity coefficient
Protective casing carries out completion；
(6) water injection well continues to be drilled down into certain distance, and RMRS location instruments, the magnetic field signal conduct of transmitting are placed in shaft bottom
Drill through the second reservoir target center；
(7) producing well continues to be drilled down into vertical section, by deflecting again and horizontal drilling, until the second reservoir target center,
Water injection well is made to be connected with producing well in the second reservoir, and uses high thermal conductivity coefficient production technology cased hole completion；
(8) step (6), (7) are repeated, water injection well and producing well is completed and is connected simultaneously completion in third reservoir；
(9) similarly, step (6), (7) can be repeated several times, water injection well can be completed with producing well in the four, 5th etc. multiple reservoirs
Connection；
(10) tripping in water injection pipe in water injection well, and above the first reservoir at a certain distance from annular space in packer knot is installed
Structure prevents steam from being overflowed from annular space；
(11) tripping in drinking-water pipe is to reservoir horizontal segment in each producing well respectively, and drinking-water pipe is at away from ground 2.5m across heat preservation
Low heat transfer coefficient production technology casing turning water conservancy diversion；
(12) sustained water injection into water injection well, and flowed into producing well direction around, under hot dry rock high temperature action, water becomes steaming
Vapour overflows from the annular space of producing well and utilization is collected on ground, fails the high-temperature water of vaporization and can be pumped into from drinking-water pipe
Ground carries out the mode of heating etc. and is utilized；
(13) steam and high-temperature water can be delivered to water injection well after utilizing by ground installation and reinject underground, realize water recycling
It utilizes.
2. multidirectional geothermal well as described in claim 1 and high-efficiency mining hot dry rock method, it is characterised in that entire pit shaft is tree
Shape structure, for water injection well, surrounding is multiple producing wells for centre, and each producing well and water injection well are in multiple reservoirs or same
U-shaped linker structure is formed at the different well depths of layer.
3. multidirectional geothermal well as described in claim 1 and high-efficiency mining hot dry rock method, it is characterised in that the water filling of water injection well
Amount is codetermined according to Multiple factors such as the quantity, hot dry rock temperature, user demand of producing well.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810006014.2A CN108222831A (en) | 2018-01-03 | 2018-01-03 | Multidirectional geothermal well and high-efficiency mining hot dry rock method |
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| CN201810006014.2A CN108222831A (en) | 2018-01-03 | 2018-01-03 | Multidirectional geothermal well and high-efficiency mining hot dry rock method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505580A (en) * | 2019-01-17 | 2019-03-22 | 东北大学 | A kind of radial well low temperature underground heat recovery method |
| CN109577930A (en) * | 2018-12-13 | 2019-04-05 | 苏州峰极电磁科技有限公司 | Two-way geothermal well and hoistway fracturing crack method for communicating |
| CN109826595A (en) * | 2019-03-13 | 2019-05-31 | 中国科学院武汉岩土力学研究所 | A kind of multipotency joint hot dry rock energy storage heating system |
| CN111076435A (en) * | 2019-12-13 | 2020-04-28 | 西安科技大学 | Underground multi-loop heat exchange method for geothermal well |
| CN114427755A (en) * | 2022-01-17 | 2022-05-03 | 中国科学院广州能源研究所 | Efficient heat taking system of U-shaped heat exchanger for karst heat storage |
| WO2023147670A1 (en) * | 2022-02-04 | 2023-08-10 | Novus Earth Energy Operations Inc. | Balanced geothermal energy transfer loop |
| CN118009554A (en) * | 2024-04-08 | 2024-05-10 | 中煤科工开采研究院有限公司 | Geothermal resource utilization system and method for surrounding rock of deep well roadway |
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| 肖钢等: "《煤层气——浪子变宠儿》", 30 November 2013 * |
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| CN109505580A (en) * | 2019-01-17 | 2019-03-22 | 东北大学 | A kind of radial well low temperature underground heat recovery method |
| CN109826595A (en) * | 2019-03-13 | 2019-05-31 | 中国科学院武汉岩土力学研究所 | A kind of multipotency joint hot dry rock energy storage heating system |
| CN111076435A (en) * | 2019-12-13 | 2020-04-28 | 西安科技大学 | Underground multi-loop heat exchange method for geothermal well |
| CN114427755A (en) * | 2022-01-17 | 2022-05-03 | 中国科学院广州能源研究所 | Efficient heat taking system of U-shaped heat exchanger for karst heat storage |
| WO2023147670A1 (en) * | 2022-02-04 | 2023-08-10 | Novus Earth Energy Operations Inc. | Balanced geothermal energy transfer loop |
| CN118009554A (en) * | 2024-04-08 | 2024-05-10 | 中煤科工开采研究院有限公司 | Geothermal resource utilization system and method for surrounding rock of deep well roadway |
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