CN108224819A - Multi-layer U-shape geothermal well and recovery method - Google Patents
Multi-layer U-shape geothermal well and recovery method Download PDFInfo
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- CN108224819A CN108224819A CN201810005437.2A CN201810005437A CN108224819A CN 108224819 A CN108224819 A CN 108224819A CN 201810005437 A CN201810005437 A CN 201810005437A CN 108224819 A CN108224819 A CN 108224819A
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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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Abstract
The present invention relates to geothermal energy resources to exploit field, discloses a kind of Multi-layer U-shape underground heat well construction and underground heat recovery method.Entire well bore is Multi-layer U-shape structure, and adopting thermosphere by inclination connects water injection well with producing well so that water or other working medium fully absorb Formation heat in flow process and are converted into high temperature fluid or steam, and then carry out energy acquisition by wellhead equipment.The Multi-layer U-shape geothermal well not only can be adapted for hot dry rock well, be also applied for middle low temperature geothermal well, and recovery method is simple, and development efficiency is higher, while also solve the problems, such as that working medium leakage is serious, be of great significance to Development of Geothermal Resources.
Description
Technical field
The present invention relates to geothermal energy development field, particularly a kind of Multi-layer U-shape ground well and recovery method.
Background technology
In future source of energy development field, underground heat is a kind of one of extremely competitive renewable resource.It develops and fills
Divide and utilize emerging clean reproducible energy, be that world situation is become, be needed for national development.Middle low temperature geothermal energy and hot dry rock
As a kind of clean energy resource of buried underground, underground storage enriches, and is the weight link of future source of energy exploitation, but at present not
To large-scale developing and utilizing.Geothermal well mostly exploits hot dry rock using artificial fracturing and intrinsic fracture at present.Due to dry
Hot rock resource buries depth, and porosity and permeability is minimum, and it is low, of high cost that artificial fracturing mode exploits geothermal energy resources utilization ratio,
Because the loss of working medium has the problem of pollution hot dry rock natural reservoirs.
Based on problem above, to save development cost, geothermal energy resources production efficiency is improved, the present invention proposes a kind of multilayer
U-shaped geothermal well and its recovery method.Working media is caused to fully absorb rock stratum heat using the construction of Multi-layer U-shape well, so as to big
Improve underground heat coefficient of mining greatly.
Invention content
The purpose of the present invention is：In order to overcome, existing geothermal well production efficiency is low, energy consumption is big, working medium easily leakage etc. is asked
Topic, spy carry a kind of Multi-layer U-shape geothermal well, and geothermal energy resources production efficiency can be greatly improved in it.
To achieve these goals, the present invention uses following technical scheme：Multi-layer U-shape geothermal well is by water injection well and life
Well construction is produced, water injection well is divided into vertical section, inclination section, tilting section, and producing well is Vertical Well, and producing well passes through inclination with water injection well
Duan Liantong and formed it is multiple adopt thermosphere, well bore system structure is in Multi-layer U-shape shape, and when water injection well vertical section completion uses heat preservation technology
With high heat conduction protective casing when casing, inclination section and tilting section completion, tripping in water filling tube bank in water injection well, under water filling tube bank respectively
To first adopt thermosphere, second adopt thermosphere, third adopts that thermosphere etc. is each to adopt thermosphere, producing well well section heat preservation technology set above reservoir
Pipe, lower section section high heat conduction protective casing.
Tripping in vapor collecting apparatus and water filling tube bank, and sealing device is installed in top pit shaft simultaneously in water injection well, in life
It produces tripping in vapor collecting apparatus in well and sealing device is installed in top pit shaft side, which is suitable for hot dry rock well；Multilayer U
Type geothermal well exploit when, by ground installation to water filling tube bank in water filling, water be transported to first adopt thermosphere, second adopt thermosphere,
Third adopts thermosphere, and is flowed into producing well direction, and the heat that water fully absorbs hot dry rock reservoir in tilting section flow process becomes
For steam, steam flows into water injection well and producing well along the both direction for adopting thermosphere, is delivered to ground finally by vapor collecting apparatus
The acquisition that face carries out steam energy utilizes, the steam liquefied Cheng Shui being utilized, and is pumped into water filling tube bank again by land equipment.
Or only tripping in water filling is restrained in water injection well, top pit shaft installation sealing device, in producing well tripping in drinking-water pipe and
Vapor collecting apparatus, wherein suction pipe end are in bottom and adopt thermosphere, which is suitable for middle low temperature geothermal well；Multi-layer U-shape
When geothermal well is exploited, by ground installation water filling into water filling tube bank, water is transported to first and adopts thermosphere, second adopts thermosphere, the
Three adopt thermosphere, and flow into producing well direction, and water fully absorbs the heat of geothermal reservoir in tilting section flow process, a part
Becoming high-temperature water, a part becomes steam, and high temperature water flow to producing well shaft bottom simultaneously passes through drinking-water pipe and is pumped into ground and utilized, and
Steam is delivered to ground by vapor collecting apparatus and carries out energy acquisition utilization, the steam liquefied Cheng Shui being utilized, by ground
Equipment is pumped into water filling tube bank again.
The beneficial effects of the invention are as follows：(1) present invention is designed using multilayer geothermal layer, forms large area heat transfer space,
Working medium reserves are improved, heat can be continuously generated；(2) thermosphere inclined design is adopted, can ensure working medium directed flow, is fully inhaled
Store up a layer heat；(3) water injection well " well is mostly used ", while realize that water filling is acquired with heat, and realization ground is combined with producing well
Thermal resource efficiently harvests；(4) thermosphere is adopted using high heat conduction protective casing, is improved working medium and reservoir heat transfer efficiency, is also avoided
Working medium is lost in, crack connection is bad, rock stratum is corroded and scale problems；(5) for geothermal reservoir, the same of high-temperature water is being taken
When, the interior steam generated of well can be acquired by vapor collecting apparatus, so as to improve recovery ratio.
Description of the drawings
Fig. 1 is hot dry rock exploitation Multi-layer U-shape ground well structure chart.
Fig. 2 is middle low-temperature geothermal resource exploitation Multi-layer U-shape ground well structure chart.
In figure：1. water filling is restrained, 2. sealing devices, 3. water injection wells, 4. first adopt thermosphere, and 5. second adopt thermosphere, 6. thirds
Adopt thermosphere, 7. producing wells, 8. heat preservation technology casings, 9. drinking-water pipes, 10. vapor collecting apparatus, 11. high heat conduction protective casings, 12.
Hot dry rock reservoir, 13. sealing devices, 14. sealing devices, 15. geothermal reservoirs.
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.The invention will be further described with reference to the accompanying drawings and detailed description.
As depicted in figs. 1 and 2, Multi-layer U-shape geothermal well is made of water injection well 3 and producing well 7, and it is vertical that water injection well 3, which divides,
Section, inclination section, tilting section, producing well 7 are Vertical Well, and producing well 3, which is connected with water injection well 7 and formed by tilting section, multiple adopts heat
Layer, well bore system structure are in Multi-layer U-shape shape, and heat preservation technology casing 8, inclination section and inclination are used during 3 vertical section completion of water injection well
With high heat conduction protective casing 11 during section completion, tripping in water filling tube bank 1 in water injection well, water filling tube bank 1 adopts thermosphere down toward first respectively
4th, second thermosphere 5 is adopted, third adopts that thermosphere 6 etc. is each to adopt thermosphere, producing well 7 well section heat preservation technology casing 8 above reservoir, lower section
Section high heat conduction protective casing 11.
As shown in Figure 1, tripping in vapor collecting apparatus 10 and water filling tube bank 1, and installed in top pit shaft simultaneously in water injection well 3
Sealing device 13, in producing well 7 tripping in vapor collecting apparatus 10 and top pit shaft side install sealing device 14, the well construction
Suitable for hot dry rock well；When Multi-layer U-shape geothermal well is exploited, by ground installation water filling into water filling tube bank 1, water is transported to the
One adopt thermosphere 4, second adopt thermosphere 5, third adopts thermosphere 6, and is flowed into 7 direction of producing well, water fills in tilting section flow process
The heat for absorbing hot dry rock reservoir 12 is divided to become steam, steam flows into water injection well 3 and producing well 7 along the both direction for adopting thermosphere,
The acquisition that progress steam energy in ground is delivered to finally by vapor collecting apparatus 10 utilizes, the steam liquefied Cheng Shui being utilized,
It is pumped into water filling tube bank 1 again by land equipment.
As shown in Fig. 2, the only tripping in water filling tube bank 1 in water injection well 3, top pit shaft installation sealing device 2, in producing well 7
Tripping in drinking-water pipe 9 and vapor collecting apparatus 10, wherein 9 end of drinking-water pipe are in bottom and adopt thermosphere, and the well construction is low in being suitable for
Warm geothermal well；When Multi-layer U-shape geothermal well is exploited, by ground installation water filling into water filling tube bank 1, water is transported to first and adopts heat
Layer 4, second adopts thermosphere 5, third adopts thermosphere 6, and is flowed into 7 direction of producing well, and water fully absorbs in tilting section flow process
The heat of geothermal reservoir 15, a part become high-temperature water, and a part becomes steam, and high temperature water flow is to 7 shaft bottom of producing well and passes through
Drinking-water pipe 9 is pumped into ground and is utilized, and steam is delivered to ground by vapor collecting apparatus 10 and carries out energy acquisition utilization, quilt
The steam liquefied Cheng Shui utilized is pumped into water filling tube bank 1 by land equipment again.
Claims (3)
1. Multi-layer U-shape geothermal well is made of water injection well (3) and producing well (7), it is characterised in that：Water injection well (3) is divided into vertically
Section, inclination section, tilting section, producing well (7) are Vertical Well, and producing well (3) is connected by tilting section and formed more with water injection well (7)
A to adopt thermosphere, well bore system structure is in Multi-layer U-shape shape, using heat preservation technology casing (8) during water injection well (3) vertical section completion, is made
With high heat conduction protective casing (11) when oblique section and tilting section completion, tripping in water filling tube bank (1) in water injection well, water filling tube bank (1) point
Not down toward first adopt thermosphere (4), second adopt thermosphere (5), third adopts that thermosphere (6) etc. is each to adopt thermosphere, producing well (7) above reservoir
Well section heat preservation technology casing (8), lower section section high heat conduction protective casing (11).
2. Multi-layer U-shape geothermal well according to claim 1, it is characterised in that tripping in steam is collected simultaneously in water injection well (3)
Device (10) and water filling tube bank (1), and sealing device (13) is installed in top pit shaft, it is collected in the interior tripping in steam of producing well (7)
Device (10) simultaneously installs sealing device (14) in top pit shaft side, which is suitable for hot dry rock well；Multi-layer U-shape geothermal well is opened
When adopting, (1) interior water filling is restrained to water filling by ground installation, water is transported to first and adopts thermosphere (4), second adopts thermosphere (5), the
Three adopt thermosphere (6), and flow into producing well (7) direction, and water fully absorbs hot dry rock reservoir (12) in tilting section flow process
Heat become steam, steam flows into water injection well (3) and producing well (7) along the both direction for adopting thermosphere, is received finally by steam
Acquisition means (10) are delivered to the acquisition utilization that ground carries out steam energy, the steam liquefied Cheng Shui being utilized, by land equipment
It is pumped into water filling tube bank (1) again.
3. Multi-layer U-shape geothermal well according to claim 1, feature or it is in water injection well (3) only tripping in water injection pipe
Beam (1), top pit shaft installation sealing device (2), the interior tripping in drinking-water pipe (9) of producing well (7) and vapor collecting apparatus (10), wherein
Drinking-water pipe (9) end is in bottom and adopts thermosphere, which is suitable for middle low temperature geothermal well；When Multi-layer U-shape geothermal well is exploited, lead to
Cross ground installation and restrain (1) interior water filling to water filling, water be transported to first adopt thermosphere (4), second adopt thermosphere (5), third adopts heat
Layer (6), and flows into producing well (7) direction, and water fully absorbs the heat of geothermal reservoir (15) in tilting section flow process, and one
Partially change into high-temperature water, a part becomes steam, and high temperature water flow to producing well (7) shaft bottom simultaneously passes through drinking-water pipe (9) and is pumped into ground
It is utilized, and steam is delivered to ground by vapor collecting apparatus (10) and carries out energy acquisition utilization, the vapor liquid being utilized
Water is melted into, is pumped into water filling tube bank (1) again by land equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810005437.2A CN108224819A (en) | 2018-01-03 | 2018-01-03 | Multi-layer U-shape geothermal well and recovery method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810005437.2A CN108224819A (en) | 2018-01-03 | 2018-01-03 | Multi-layer U-shape geothermal well and recovery method |
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| CN108224819A true CN108224819A (en) | 2018-06-29 |
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| CN201810005437.2A Pending CN108224819A (en) | 2018-01-03 | 2018-01-03 | Multi-layer U-shape geothermal well and recovery method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406753A (en) * | 2018-10-30 | 2019-03-01 | 河南理工大学 | High temperature driven gas-liquid voluntarily circulating analog geothermal energy Mining Test device |
| CN111076435A (en) * | 2019-12-13 | 2020-04-28 | 西安科技大学 | Underground multi-loop heat exchange method for geothermal well |
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| CN203349411U (en) * | 2013-06-21 | 2013-12-18 | 南京工程学院 | Frostless air conditioner capable of exchanging heat based on air-soil energy |
| CN204163939U (en) * | 2014-09-29 | 2015-02-18 | 濮阳洪峰地热新能源开发有限公司 | A kind of honeycomb system for geothermal production of electricity |
| CN104612691A (en) * | 2014-11-27 | 2015-05-13 | 中盐勘察设计院有限公司 | Single borehole multilateral directional butted well salt mining method |
| CN104713259A (en) * | 2015-03-20 | 2015-06-17 | 清华大学 | Method and system for extracting heat energy of hot dry rocks |
| CN107476797A (en) * | 2017-08-22 | 2017-12-15 | 陕西省煤田地质集团有限公司 | A kind of construction method of the casing programme of the horizontal docking geothermal well of heat exchange type |
-
2018
- 2018-01-03 CN CN201810005437.2A patent/CN108224819A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203349411U (en) * | 2013-06-21 | 2013-12-18 | 南京工程学院 | Frostless air conditioner capable of exchanging heat based on air-soil energy |
| CN204163939U (en) * | 2014-09-29 | 2015-02-18 | 濮阳洪峰地热新能源开发有限公司 | A kind of honeycomb system for geothermal production of electricity |
| CN104612691A (en) * | 2014-11-27 | 2015-05-13 | 中盐勘察设计院有限公司 | Single borehole multilateral directional butted well salt mining method |
| CN104713259A (en) * | 2015-03-20 | 2015-06-17 | 清华大学 | Method and system for extracting heat energy of hot dry rocks |
| CN107476797A (en) * | 2017-08-22 | 2017-12-15 | 陕西省煤田地质集团有限公司 | A kind of construction method of the casing programme of the horizontal docking geothermal well of heat exchange type |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406753A (en) * | 2018-10-30 | 2019-03-01 | 河南理工大学 | High temperature driven gas-liquid voluntarily circulating analog geothermal energy Mining Test device |
| CN111076435A (en) * | 2019-12-13 | 2020-04-28 | 西安科技大学 | Underground multi-loop heat exchange method for geothermal well |
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Application publication date: 20180629 |
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