CN110360761A - A kind of tree-shaped hot dry rock well construction and recovery method - Google Patents
A kind of tree-shaped hot dry rock well construction and recovery method Download PDFInfo
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- CN110360761A CN110360761A CN201810006004.9A CN201810006004A CN110360761A CN 110360761 A CN110360761 A CN 110360761A CN 201810006004 A CN201810006004 A CN 201810006004A CN 110360761 A CN110360761 A CN 110360761A
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- hot dry
- dry rock
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- thermosphere
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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 hot dry rock resource exploitation field, a kind of tree-shaped hot dry rock well construction and recovery method are disclosed.The well depth structure is divided into vertical section, inclination section and inclination son field.Wherein hot dry rock reservoir is divided into different high-temperature heating areas by inclination Multilateral Wells, it can be realized height and adopt heating rate exploitation of geothermal system, down-hole application high thermal conductivity coefficient production technology casing, realize being isolated for working-medium water and hot dry rock reservoir, avoid conventional pressure break extraction system to the damage of hot dry rock reservoir, permeability is low the problems such as.Tripping in water filling tube bank is into each recharge layer in Vertical Well, simultaneously above tripping in vapor collecting apparatus to hot dry rock reservoir, to realize the water conservancy diversion and energy acquisition of high-temperature steam, after ground utilizes after high-temperature vapor liquefaction, underground can be delivered to again by land equipment.
Description
Technical field
The present invention relates to geothermal energy development field, particularly a kind of tree-shaped hot dry rock well construction and recovery method.
Background technique
The problems such as pollution of traditional fossil energy resource environment, scarcity of resources, gets worse.It develops and makes full use of and is emerging
Clean reproducible energy is that world situation is become, and copes with the act of great hot issues such as " global warming " " energy-saving and emission-reduction "
It arranges.Underground heat is the clean energy resource of a kind of great potential and competitiveness, is got the attention.Hot dry rock in geothermal energy resources is also referred to as
" enhanced geothermal system ", general temperature are greater than 200 DEG C, and the thousands of rice of buried depth, inside is there is no fluid or there is only minute quantities
The high heat rock mass of fluid.With the progress of exploration and development technology, reasonable development can be particularly important with using dry-hot-rock geothermal,
The exploitation of deep geothermal not only can optimize recombination to existing energy resource structure, also further solve plateau remotely
The practical problems such as the electricity consumption heating in area.Hot dry rock resource buries depth, and porosity and permeability is minimum.High temperature geothermal energy resources at present
Development technique it is not yet mature, mainly pass through toward underground transportation work medium --- water extracts geothermal energy resources.Conventional opens
For example pure artificial fracturing of technology, intrinsic fracture-artificial fracturing, individual well exploitation and Multilateral Wells exploitation are adopted, though it mentions to a certain extent
High geothermal energy resources harvest utilization rates, but due to the scrambling of pressure break rock seam, the rock seam of effective use is less, heat storage difficulty compared with
Greatly, cause working medium to be lost serious, realize that Efficient Development is more difficult.
The invention proposes a kind of tree-shaped hot dry rock well construction and recovery methods thus, by increasing xeothermic rock stratum heat-transfer surface
Product is to improve working medium heat exchange rate.And This solution avoids the loss of working medium caused by artificial fracturing technology, poor efficiency
Problem has important directive function to the development and utilization of the dry-hot-rock geothermal energy, is conducive to push China's renewable energy work
The development of industry.
Summary of the invention
In order to improve the efficient utilization of geothermal energy resources, above-mentioned technical purpose is realized, the technical solution of the present invention is as follows:
A kind of tree-shaped hot dry rock well construction and recovery method, it is specific as follows,
(1) by scientific geology detecting, hot dry rock reservoir position, underground area coverage are determined, hot dry rock well location is chosen and sets
And determine inclination Multilateral Wells length；
(2) hot dry rock well casing programme is divided into vertical section, inclination section, tilting section；
(3) it drills through and has carried out well in Vertical Well to hot dry rock reservoir after certain position, heat preservation technology casing is used when complete well；
(4) on the basis of step (3), using casing sidetracking technology, deflecting is first carried out, then carry out inclined drilling, tilted
Angle is 5 °~10 °, after the horizontal distance of drilling to corresponding earth's surface planning, has carried out well using high thermal conductivity protective casing, formation the
One adopts first inclination Multilateral Wells of thermosphere；
(5) step (4) are repeated and complete other Multilateral Wells that same depth first adopts thermosphere；
(6) certain distance is crept into the vertical bottom along step (3), continuation vertically downward, repeats step (4), (5), shape
At multiple multiple Multilateral Wells for adopting thermosphere such as second, third.
(7) tube bank of tripping in water injection pipe is tilted to first, second, third, etc. each thermosphere branch of adopting respectively in hot dry rock well
Section；Vertical well section tripping in vapor collecting apparatus, and sealing device is installed in annular space；
(8) when exploiting, the sustained water injection into hot dry rock well, water flow is along the branch's well section for respectively adopting thermosphere, and water flow is by hot dry rock
The high-temperature heating of reservoir becomes high-temperature steam respectively adopting working-medium water in thermosphere；
(9) steam is from along respectively adopting, thermosphere reversely flows into Vertical Well and progress energy in introducing ground is adopted from vapor collecting apparatus
Collection；
(10) steam ground is liquefied after being utilized, and the water after liquefaction can be delivered to well head by ground installation and reinject ground
Under, realize that water recycling is used.
Preferably: in step (3), selecting heat preservation technology casing, reduce the loss of steam heat；
Preferably: in step (4), selecting the production casing of high thermal conductivity coefficient, improve working medium and hot dry rock in pipeline and store up
The heat exchange of layer；
Preferably: the thermosphere of adopting for adopting hot well is crept into using certain inclination angle, and the working medium water flow for guaranteeing respectively to adopt in thermosphere is fixed
To flowing, the heat of hot dry rock reservoir is fully absorbed；
Preferably: in step (7), respectively being adopted the corresponding water filling of thermosphere in water injection well in a manner of tube bank, be capable of providing and fill
The working media of foot；
Preferably: in step (7), on the one hand the application of sealed fixing device realizes that hot dry rock reservoir and hot dry rock store up
Layer top area isolation, prevents steam from overflowing from annular space, promotes steam to enter vapor collecting apparatus, on the other hand to water injection pipe
Beam and vapor collecting apparatus play fixed function；
The beneficial effects of the present invention are: the 1, present invention is designed more using tree-shaped thermospheres of adopting, the hot storage cavern of large area is formd,
Working medium reserves are improved, heat can be continuously generated.2, the inclined design of thermosphere is adopted, the water flow that can guarantee respectively to adopt in thermosphere is fixed
To flowing, the heat of hot dry rock reservoir is fully absorbed, improve recharge rate and adopts heating rate.3, the present invention is in hot dry rock heat reservori
Using high thermal conductivity coefficient technology production casing, heat transfer efficiency between working medium and rock stratum is improved, also avoids working medium loss, crack
The problem of being connected to bad, rock stratum corrosion and fouling.
Detailed description of the invention
Fig. 1 is a kind of tree-shaped hot dry rock well construction and recovery method.
In figure: 1. hot dry rock wells, 2. heat preservation technology casings, 3. ground, 4. vapor collecting apparatus, 5. water filling tube banks, 6. is close
Seal apparatus, 7. high thermal conductivity protective casings, 8. hot dry rock reservoirs, 9. first adopt thermosphere, and 10. second adopt thermosphere, and 11. thirds adopt heat
Layer, 12. inclinations angle.
Specific embodiment
Invention is not limited by following embodiments, can determine tool with actual conditions according to the technique and scheme of the present invention
The embodiment of body.The present invention will be further explained below with reference to the attached drawings
In conjunction with Fig. 1, a kind of tree-shaped hot dry rock well construction and recovery method are specific as follows,
(1) by scientific geology detecting, 8 position of hot dry rock reservoir, underground area coverage are determined, chooses 1, hot dry rock well
Set and determine inclination Multilateral Wells length；
(2) 1 casing programme of hot dry rock well is divided into vertical section, inclination section, tilting section；
(3) it drills through and has carried out well in Vertical Well to hot dry rock reservoir 8 after certain position, heat preservation technology casing is used when complete well
2；
(4) on the basis of step (3), using casing sidetracking technology, deflecting is first carried out, then carry out inclined drilling, tilted
Angle 12 is 5 °~10 °, after the horizontal distance of drilling to corresponding earth's surface planning, has carried out well using high thermal conductivity protective casing 7, has been formed
First adopts first inclination Multilateral Wells of thermosphere 9；
(5) step (4) are repeated and complete other Multilateral Wells that same depth first adopts thermosphere 9；
(6) certain distance is crept into the vertical bottom along step (3), continuation vertically downward, repeats step (4), (5), shape
Thermosphere 10 is adopted at second, third adopts multiple multiple Multilateral Wells for adopting thermosphere such as thermosphere 11.
(7) tripping in water injection pipe tube bank 5 is tilted to first, second, third, etc. each thermosphere branch of adopting respectively in hot dry rock well
Section；Vertical well section tripping in vapor collecting apparatus 4, and sealing device 6 is installed in annular space；
(8) when exploiting, the sustained water injection into hot dry rock well 1, water flow is along the branch's well section for respectively adopting thermosphere, and water flow is by hot dry rock
The high-temperature heating of reservoir 8 becomes high-temperature steam respectively adopting working-medium water in thermosphere；
(9) steam is from along respectively adopting, thermosphere reversely flows into Vertical Well and introducing ground 3 carries out energy from vapor collecting apparatus
Acquisition；
(10) steam ground is liquefied after being utilized, and the water after liquefaction can be delivered to well head by ground installation and reinject ground
Under, realize that water recycling is used.
As shown in Figure 1, hot dry rock well well bore is tree, each branch for adopting thermosphere forms certain angle with earth's surface and inclines
Tiltedly, the vertical structure space of hot dry rock reservoir is made full use of, the underground Jing Shangyu forms closed water cycle loop.Individual well while reality
Heat is now filled the water and adopts, underground mostly inclination adopts thermosphere and forms large-scale heat reservoir, provides sufficient geothermal energy for floor heating, power generation etc.
Source.
Herein, the related noun of locality is defined with relative position between each structure in scheming, 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, replacement for being made etc., within that scope of the present invention.
Claims (3)
1. a kind of tree-shaped hot dry rock well construction and recovery method, specific as follows,
(1) by scientific geology detecting, hot dry rock reservoir position, underground area coverage are determined, choose hot dry rock well location set and
Determine inclination Multilateral Wells length；
(2) hot dry rock well casing programme is divided into vertical section, inclination section, tilting section；
(3) it drills through and has carried out well in Vertical Well to hot dry rock reservoir after certain position, heat preservation technology casing is used when complete well；
(4) on the basis of step (3), using casing sidetracking technology, deflecting is first carried out, then carry out inclined drilling, inclination angle is
5 °~10 °, drilling has carried out well to after corresponding to the horizontal distance that earth's surface is planned, using high thermal conductivity protective casing, forms first and adopts
First inclination Multilateral Wells of thermosphere；
(5) step (4) are repeated and complete other Multilateral Wells that same depth first adopts thermosphere；
(6) certain distance is crept into the vertical bottom along step (3), continuation vertically downward, repeats step (4), (5), forms the
Two, multiple multiple Multilateral Wells for adopting thermosphere such as third.
(7) tube bank of tripping in water injection pipe each adopts thermosphere branch tilting section to first, second, third, etc. respectively in hot dry rock well；It is perpendicular
Straight well section tripping in vapor collecting apparatus, and sealing device is installed in annular space；
(8) when exploiting, the sustained water injection into hot dry rock well, water flow is along the branch's well section for respectively adopting thermosphere, and water flow is by hot dry rock reservoir
High-temperature heating, become high-temperature steam respectively adopting working-medium water in thermosphere；
(9) steam is from along respectively adopting, thermosphere reversely flows into Vertical Well and introducing ground carries out energy acquisition from vapor collecting apparatus；
(10) steam ground is liquefied after being utilized, and the water after liquefaction can be delivered to well head by ground installation and reinject underground, real
Existing water recycling is used.
2. a kind of tree-shaped hot dry rock well construction as described in claim 1 and recovery method, it is characterised in that: hot dry rock well well bore
For tree, each branch for adopting thermosphere and earth's surface form certain angle inclination, make full use of longitudinal knot of hot dry rock reservoir
Conformational space, the underground Jing Shangyu form closed water cycle loop.
3. a kind of tree-shaped hot dry rock well construction as described in claim 1 and recovery method, it is characterised in that: individual well is realized simultaneously
Heat is filled the water and adopts, underground mostly inclination adopts thermosphere and forms large-scale heat reservoir, provides sufficient geothermal energy resources for floor heating, power generation etc..
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| CN201810006004.9A CN110360761A (en) | 2018-01-03 | 2018-01-03 | A kind of tree-shaped hot dry rock well construction and recovery method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237146A (en) * | 2020-01-14 | 2020-06-05 | 西南石油大学 | Geothermal branch well constant temperature difference power generation system |
| NO345651B1 (en) * | 2020-01-17 | 2021-05-31 | Eyvind Normann | Exploiting Geothermal Energy through heat recovery by circulating water in purpose-built system of multilateral wells |
| CN114482930A (en) * | 2020-10-23 | 2022-05-13 | 中国科学院广州能源研究所 | Unconsolidated sandstone area geothermal mining method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2041041A (en) * | 1979-01-12 | 1980-09-03 | Hdr Energy Dev Corp | Method for producing a geothermal reservoir in a hot dry rock formation for the recovery of geothermal energy |
| WO2015159188A2 (en) * | 2014-04-14 | 2015-10-22 | Ozols Ojars | A method of borehole arrangement for extraction of geothermal energy |
| CN105909214A (en) * | 2016-04-14 | 2016-08-31 | 中国石油大学(华东) | Method for exploiting compact dry heat rock geothermal energy by utilizing long horizontal well self-circulation structure |
| CN205939788U (en) * | 2016-07-05 | 2017-02-08 | 河南圆方干热岩勘探开发股份有限公司 | Do hot dry rock (EGS) monocline well heat exchange system |
| CN106948795A (en) * | 2017-03-30 | 2017-07-14 | 中国石油大学(北京) | A kind of method that multi-branched horizontal well closed cycle develops hot water type underground heat |
| CN106949649A (en) * | 2017-04-17 | 2017-07-14 | 山西泰杰地能干热岩有限公司 | The tree-shaped multiple spot heat-exchange system of ground energy hot dry rock and its heat-exchange method |
| CN106978993A (en) * | 2017-05-16 | 2017-07-25 | 中国地质大学（武汉） | A kind of medium and deep sandstone underground heat horizontal well recovery method and structure |
-
2018
- 2018-01-03 CN CN201810006004.9A patent/CN110360761A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2041041A (en) * | 1979-01-12 | 1980-09-03 | Hdr Energy Dev Corp | Method for producing a geothermal reservoir in a hot dry rock formation for the recovery of geothermal energy |
| WO2015159188A2 (en) * | 2014-04-14 | 2015-10-22 | Ozols Ojars | A method of borehole arrangement for extraction of geothermal energy |
| CN105909214A (en) * | 2016-04-14 | 2016-08-31 | 中国石油大学(华东) | Method for exploiting compact dry heat rock geothermal energy by utilizing long horizontal well self-circulation structure |
| CN205939788U (en) * | 2016-07-05 | 2017-02-08 | 河南圆方干热岩勘探开发股份有限公司 | Do hot dry rock (EGS) monocline well heat exchange system |
| CN106948795A (en) * | 2017-03-30 | 2017-07-14 | 中国石油大学(北京) | A kind of method that multi-branched horizontal well closed cycle develops hot water type underground heat |
| CN106949649A (en) * | 2017-04-17 | 2017-07-14 | 山西泰杰地能干热岩有限公司 | The tree-shaped multiple spot heat-exchange system of ground energy hot dry rock and its heat-exchange method |
| CN106978993A (en) * | 2017-05-16 | 2017-07-25 | 中国地质大学（武汉） | A kind of medium and deep sandstone underground heat horizontal well recovery method and structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237146A (en) * | 2020-01-14 | 2020-06-05 | 西南石油大学 | Geothermal branch well constant temperature difference power generation system |
| NO345651B1 (en) * | 2020-01-17 | 2021-05-31 | Eyvind Normann | Exploiting Geothermal Energy through heat recovery by circulating water in purpose-built system of multilateral wells |
| WO2021145776A1 (en) * | 2020-01-17 | 2021-07-22 | Eyvind Normann | Exploiting geothermal energy through heat recovery by circulating working fluid in purpose-built system of multilateral wells |
| EP4090895A4 (en) * | 2020-01-17 | 2024-02-07 | Eyvind Normann | Exploiting geothermal energy through heat recovery by circulating working fluid in purpose-built system of multilateral wells |
| CN114482930A (en) * | 2020-10-23 | 2022-05-13 | 中国科学院广州能源研究所 | Unconsolidated sandstone area geothermal mining method |
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Application publication date: 20191022 |
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