CN206803542U - A kind of porous geothermal well system of large span - Google Patents
A kind of porous geothermal well system of large span Download PDFInfo
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- CN206803542U CN206803542U CN201720571904.9U CN201720571904U CN206803542U CN 206803542 U CN206803542 U CN 206803542U CN 201720571904 U CN201720571904 U CN 201720571904U CN 206803542 U CN206803542 U CN 206803542U
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- well
- withdrawal
- injection
- geothermal
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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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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of porous geothermal well system of large span, a kind of porous geothermal well system of large span, including injection well and withdrawal well, the injection well is the utility model is related to connect with withdrawal well bottom, wherein, the withdrawal well is Vertical Well；The injection well includes vertical section and horizontal segment, and the vertical section bottom connects with described horizontal segment one end, and the horizontal segment other end connects with the withdrawal well；The injection well is provided with more mouthfuls, and symmetrical centered on the withdrawal well；The horizontal segment of the more mouthfuls of injection wells is respectively arranged in the hot dry rock reservoir of different depth；Geothermal well system of the present utility model, ground well head is arranged using " rice " font, centered on withdrawal well, 48 mouthfuls of injection wells are arranged around, injection well connects with withdrawal well respectively, can so increase the quantity of circulating water of withdrawal well, quantity of heat production greatly increases simultaneously, and heating area is also significantly increased.
Description
Technical field
The utility model belongs to geothermal well technical field, and in particular to a kind of porous geothermal well system of large span.
Background technology
The relevant new energy report display of the United Nations：Global geothermal energy resources total resources, equivalent to global resources total flow
450,000 times.The decay of radioactive element is the main source of earth heat energy.The earth of motion constantly stores up and discharged energy
Amount.Scattered and disappeared every year by heat transfer, volcanic eruption, earthquake, the substantial amounts of energy of release such as hot spring.Continental crust general thickness is 30
~70 kilometers, geothermic gradient gradually increases from the top down, general every lower 100m, and temperature raises 3 DEG C, geothermal energy type underground heat buried depth to ground
Under thousands of rice, inside in the absence of fluid or only a small amount of underground fluid high heat rock mass.Because substantial amounts of geothermal energy type underground heat obtains
Utilized less than effective, cause a large amount of losses and waste of the energy.
Mass energy can be saved by carrying out circulation heating using underground heat, and be advantageous to environmental protection.In the prior art,
Most geothermal heating system is all exchanged heat using individual well, and some are exchanged heat using U-shaped well, but such geothermal heating system, due in well
Water injection rate it is limited, the GEOTHERMAL WATER extracted out is limited after causing heat exchange, and multiple individual wells exchange heat simultaneously needs multigroup heat transmission equipment,
Cost is too high, so can not meet the heating of large area.
Through retrieval, Application No. " 201510124612.6 ", patent name for " it is a kind of extract hot dry rock heat energy method and
The patent of invention of system ", the system of the patent notes include hot dry rock reservoir, injection well system, horizontal well system and production
Go out well system；The injection well system includes some injection well casings, and the horizontal well system includes some horizontal well tubes, institute
Stating withdrawal well includes some output well casings, and the port of export at the injection well ttom of pipe end connects with the arrival end of the horizontal well tube
Logical, the port of export of the horizontal well tube connects with the arrival end at the withdrawal well ttom of pipe end.
The program with well casing by realizing the heat energy in a large amount of extraction hot dry rocks more, but due to an injection well casing difference
A corresponding horizontal well tube and an output well casing, so the water in a pipeline is fixed, so the heat of its offer
And fixed, corresponding its supplies area and also receives limitation, moreover, having in injection well and withdrawal well more with pipeline, also can
Influence underground heat exchange effect.
Utility model content
The small technical problem of heat is taken in order to solve to exist in the prior art underground, the utility model provides following technology
Scheme：
A kind of porous geothermal well system of large span, including injection well and withdrawal well, the injection well and withdrawal well bottom connect
It is logical, wherein, the withdrawal well is Vertical Well；
The injection well includes vertical section and horizontal segment, and the vertical section bottom connects with described horizontal segment one end, described
The horizontal segment other end connects with the withdrawal well；
The injection well is provided with more mouthfuls, and symmetrical centered on the withdrawal well；
The horizontal segment of the more mouthfuls of injection wells is respectively arranged in the hot dry rock reservoir of different depth.
As further explanation of the present utility model, the depth that the horizontal segment of the injection well is set is determined by strata structure
It is fixed.
As further explanation of the present utility model, the quantity of the injection well is 4-8.
As further explanation of the present utility model, the quantity of the injection well is 8, and bottom surface well head is with the output
Centered on well, it is distributed in rice font.
As further explanation of the present utility model, the injection well and withdrawal well are in outside the pipeline section in the hot dry rock of underground
Surface is disposed with heat conduction cement layer and heat conduction oxidant layer.
As further explanation of the present utility model, pipeline section that the injection well and withdrawal well are in more than underground hot dry rock
Outer surface is provided with insulating cement layer.
Compared with prior art, what the utility model obtained has the beneficial effect that：
Geothermal well system of the present utility model, ground well head is arranged using " rice " font, centered on withdrawal well, around
4-8 mouth injection wells are arranged, injection well connects with withdrawal well respectively, can so increase the quantity of circulating water of withdrawal well, while heat production
Amount greatly increases, and heating area is also significantly increased.
The utility model is described in further details below with reference to drawings and Examples.
Brief description of the drawings
Fig. 1 is geothermal well system pipeline structural representation of the present utility model.
Fig. 2 is geothermal well system ground well head distribution schematic diagram of the present utility model.
In figure：1st, injection well；2nd, withdrawal well；3rd, vertical section；4th, horizontal segment.
Embodiment
For the technological means and effect that the utility model is reached predetermined purpose and taken is expanded on further, below in conjunction with accompanying drawing
And embodiment describes in detail as follows to specific embodiment of the present utility model, architectural feature and its effect.
Particularly point out, term of the present utility model " on ", " under ", "left", "right", " top surface ", " bottom surface ", " interior ", " outer "
Orientation or position relationship Deng instruction are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this practicality newly
Type and simplifying describes, rather than instruction or implies that signified device or element must have specific orientation, with specific orientation
Construction and operation, therefore it is not intended that to limitation of the present utility model.
A kind of porous geothermal well system of large span, including injection well 1 and withdrawal well 2, injection well 1 and the bottom of withdrawal well 2 connect
It is logical, wherein, withdrawal well 2 is Vertical Well；Injection well 1 includes vertical section 3 and horizontal segment 4, the bottom of vertical section 3 and the one end of horizontal segment 4
Connection, the other end of horizontal segment 4 connect with withdrawal well 2；Injection well 1 is provided with 4-8 mouths, and centered on withdrawal well 2, in " rice " word
Type is distributed；The horizontal segment 4 of more mouthfuls of injection wells 1 is respectively arranged in the hot dry rock reservoir of different depth, the horizontal segment of injection well 1
When 4 depth set are by practice of construction, the hot dry rock formation depth of job location determines.
Preferably, the pipeline section outer surface that injection well 1 and withdrawal well 2 are in the hot dry rock of underground is disposed with heat conduction cement
Layer and heat conduction oxidant layer；The pipeline section outer surface that injection well 1 and withdrawal well 2 are in more than underground hot dry rock is provided with insulating cement layer.
By the geothermal well system, multiple injection wells 1 inject cooling water and carry out underground heat exchange simultaneously, and cooling water is in injection well
1 horizontal segment 4 absorbs the heat in hot dry rock, then flows into withdrawal well 2 by the delivery port of horizontal segment 4, cold in multiple horizontal wells
But water can reach the several times of common individual well, quantity of heat production and heating by the output of withdrawal well 2, the water yield of such withdrawal well 2
Area also increases considerably.
In practice of construction, the maximum of a bite withdrawal well 2 can 8 mouthfuls of injection wells 1 of band, injection well 1 centered on withdrawal well 2, be in
" rice " font is distributed, and " rice " font well loop number as one group can reach 800-1200 cubic meters/hour, quantity of heat production
24-64MW/H, heating area can reach ten thousand square metres of 60-100.
The geothermal well system Specific construction process is as follows：
(1) a kind of high temperature hot dry rock reservoir is chosen, using drilling equipment, one, which spuds in, wears hot dry rock reservoir ground top layer, carries
After brill, tripping in top layer insulating cement sleeve pipe, while using insulating cement slurry well cementation；
(2) well head and ground blowout control equipment are installed, then more bit change progress two is opened, and is drilled into 2600 meters, is started deflecting and is made
Industry drills hot dry rock reservoir, and drilling tripping in sleeve pipe, uses simultaneously to hot dry rock reservoir bottom section to 3000 meters of horizontal segments
Special efficacy thermal conducting agent；
Magnetic orientation technology is used in (3) three exploitations, and two mouthfuls of wells start to wearing operation, and underground work uses international advanced technology, fixed
To multimode magnetic induction type technology, to tripping in sleeve pipe after biography, while special efficacy thermal conducting agent is used；
(4) outer corrosion heat exchange steel tube is added after carrying brill, and uses special heat conduction well cementing of cement；Butted part uses German well
Lower robot sealing welding operation, welding portion are fully sealed, carry out and only take heat, the environmentally friendly geothermal system of not water outlet；
(5) tripping in production casing, while using perforating and fracturing technique separate stratum fracfturing hot dry rock lower regions reservoir, fracturing fluid
Hot dry rock reservoir is pressed into along preforation tunnel, so as to a wide range of interior pressure break hot dry rock reservoir, and connects hot dry rock lower regions.
(6) after pressure break, act production casing, the novel pre-stressed N80 steel pipes of tripping in, lead to so as to provide to take hot fluid and produce
Road.
(7) along casing annulus tripping in packer, packer is arranged on above and below hot dry rock among perforated zone, heat is taken in prevention
Fluid flows in the air in the collar.
(8) open ground injection pump, hot fluid will be taken and injected along casing annulus, take hot fluid will along top perforation well and
Fracturing fracture flows into hot dry rock reservoir around pit shaft, and under injection pressure and Action of Gravity Field, flows to around pit shaft and xeothermic
Rock reservoir bottom.
(9) special efficacy thermal conducting agent is poured into fracturing fracture after pressure break, using expansion tube Sealing Technology block perforation, make steel pipe with
Hot dry rock top layer forms a kind of heat transfer root system.
(10) ground suction pump is opened, bottom perforation well will be flowed into from fracturing fracture by taking hot fluid, and along thermal sleeve
Ground is flowed back to, by heat-exchange apparatus, exploits geothermal energy therein, and the hot fluid of taking after cooling is done by circulating pump injection
Hot rock reservoir, realize that rice type well takes hot fluid circulation flowing.
The master data that one group of " rice " font well is provided herein according to simulation calculating is as follows：
Table 1, basic data
Remarks：Data are that software calculates gained automatically in form, are defined by local data during practice of construction.
Position relationship between table 2, injection well and withdrawal well
Above-mentioned data are the position distribution and injection well and withdrawal well that " rice " font well is calculated in software simulation
Estimated data, do not taken this as the standard in practice of construction, need the depth of xeothermic rock stratum under base area to determine corresponding data, Ran Houjin
Row construction.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (6)
1. a kind of porous geothermal well system of large span, including injection well (1) and withdrawal well (2), the injection well (1) and withdrawal well
(2) bottom connects, it is characterised in that：The withdrawal well (2) is Vertical Well；
The injection well (1) includes vertical section (3) and horizontal segment (4), vertical section (3) bottom and the horizontal segment (4) one
End connection, horizontal segment (4) other end connect with the withdrawal well (2)；
The injection well (1) is provided with more mouthfuls, and symmetrical centered on the withdrawal well (2)；
The horizontal segment (4) of the more mouthfuls of injection wells (1) is respectively arranged in the hot dry rock reservoir of different depth.
2. geothermal well system according to claim 1, it is characterised in that：What the horizontal segment (4) of the injection well (1) was set
Depth is determined by strata structure.
3. geothermal well system according to claim 1, it is characterised in that：The quantity of the injection well (1) is 4-8.
4. geothermal well system according to claim 3, it is characterised in that：The quantity of the injection well (1) is 8, and bottom
Face well head is distributed centered on the withdrawal well (2) in rice font.
5. geothermal well system according to claim 1, it is characterised in that：The injection well (1) and withdrawal well (2) are in ground
Pipeline section outer surface in lower hot dry rock is disposed with heat conduction cement layer and heat conduction oxidant layer.
6. geothermal well system according to claim 1, it is characterised in that：The injection well (1) and withdrawal well (2) are in ground
Pipeline section outer surface more than lower hot dry rock is provided with insulating cement layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720571904.9U CN206803542U (en) | 2017-05-22 | 2017-05-22 | A kind of porous geothermal well system of large span |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720571904.9U CN206803542U (en) | 2017-05-22 | 2017-05-22 | A kind of porous geothermal well system of large span |
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| CN206803542U true CN206803542U (en) | 2017-12-26 |
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| CN201720571904.9U Expired - Fee Related CN206803542U (en) | 2017-05-22 | 2017-05-22 | A kind of porous geothermal well system of large span |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868594A (en) * | 2018-06-26 | 2018-11-23 | 西安石油大学 | Penetrate shape well pattern geothermal energy urban heat supplying method |
| CN109740203A (en) * | 2018-12-18 | 2019-05-10 | 新疆贝肯能源工程股份有限公司 | Orientation trajectory design method for underground heat well development |
| CN110206526A (en) * | 2019-05-17 | 2019-09-06 | 山东科技大学 | Prevent the design method and application method of the enhanced geothermal system of Tectonic earthquake |
| WO2020143066A1 (en) * | 2019-01-12 | 2020-07-16 | 力软科技(美国)有限责任公司 | Geothermal exploitation system and construction method therefor |
| US12000626B2 (en) | 2019-01-12 | 2024-06-04 | Mechsoft Technology (U.S.A.) Co., Llc | Geothermal development system and the construction method thereof |
-
2017
- 2017-05-22 CN CN201720571904.9U patent/CN206803542U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868594A (en) * | 2018-06-26 | 2018-11-23 | 西安石油大学 | Penetrate shape well pattern geothermal energy urban heat supplying method |
| CN109740203A (en) * | 2018-12-18 | 2019-05-10 | 新疆贝肯能源工程股份有限公司 | Orientation trajectory design method for underground heat well development |
| WO2020143066A1 (en) * | 2019-01-12 | 2020-07-16 | 力软科技(美国)有限责任公司 | Geothermal exploitation system and construction method therefor |
| US12000626B2 (en) | 2019-01-12 | 2024-06-04 | Mechsoft Technology (U.S.A.) Co., Llc | Geothermal development system and the construction method thereof |
| CN110206526A (en) * | 2019-05-17 | 2019-09-06 | 山东科技大学 | Prevent the design method and application method of the enhanced geothermal system of Tectonic earthquake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20210522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |