CN207348838U - A kind of enhanced underground heat completion system of standing column well - Google Patents
A kind of enhanced underground heat completion system of standing column well Download PDFInfo
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- CN207348838U CN207348838U CN201720213647.1U CN201720213647U CN207348838U CN 207348838 U CN207348838 U CN 207348838U CN 201720213647 U CN201720213647 U CN 201720213647U CN 207348838 U CN207348838 U CN 207348838U
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- oil pipe
- high temperature
- water
- temperature resistant
- annular space
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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
A kind of enhanced underground heat completion system of standing column well is the utility model is related to, its feature mainly includes：Surface pipe, ordinary skill casing, high temperature resistant protective casing, oil pipe, preforation tunnel and high temperature resistant centralizer.A kind of enhanced underground heat completion system of standing column well can enable earth formation deep geothermal energy be effectively passed to ground, itself the specific implementation process is as follows：Water is injected in the annular space formed from ground to ordinary skill casing with oil pipe, water is in annular space from top toward lower flow, and when water flows to annular space bottom, water flows through preforation tunnel and enters in oil pipe, then water flows in oil pipe from lower to upper part, eventually flows to ground receiving wastewater facility.Geothermal reservoir temperature is more than 200 DEG C, reservoir heat is delivered to high temperature resistant protective casing and the annular space of oil pipe formation through high temperature resistant protective casing, the water for flowing through annular space absorbs the heat for the annular space that high temperature resistant protective casing is formed with oil pipe, temperature raises after water absorbs heat, and then high temperature water flow generates electricity through oil pipe to ground receiving wastewater facility.
Description
Technical field
It the utility model is related to underground heat production technique field, and in particular to a kind of enhanced underground heat completion system of standing column well
System.
Background technology
The resource and environment that non-renewable conventional energy resource constantly develops (oil, natural gas and coal etc.) and exploitation is brought
Problem is increasingly serious, but geothermal energy resources enter my people as a kind of cleaning, low-carbon, safe and efficient regenerative resource
The visual field.Geothermal energy is broadly divided into hot water type underground heat and xeothermic lithotype underground heat, exploits in the world at present and main using geothermal energy resources
It is hot water type underground heat, but the exploitation for xeothermic lithotype underground heat has bright prospects with utilizing.Xeothermic lithotype underground heat refers to ground
Lower reservoir is High temperature rocks, its main method exploited is that water is injected into underground from ground, is contacted by water with High temperature rocks
Heat water body is absorbed, is returned through high temperature water body and is discharged to ground to generate electricity, which is known as enhanced geothermal system, xeothermic lithotype
The exploitation of underground heat has very big potentiality in future source of energy development.
Enhanced geothermal system development scheme is at present：In the area with geothermal energy reservoir, on ground at a distance of 1000 meters
Two positions to two mouthfuls of wells of underground drilling, be then carried out at the same time pressure break in the underground geothermal reservoir position of Liang Koujing, pressure break will make
Reservoir produces crack, and crack connects two mouthfuls of wells, is then betted by ground high-pressure pump from wherein a well to ground normal-temperature water, and water leads to
The flowing of high temperature Reservoir Fracture is crossed, while absorbs geothermal energy, hot water is produced to ground from another a well and generated electricity.But it is directed to
In the system, there are some deficiency：(1) system needs to bore two mouthfuls of wells, and the expense of every mouth geothermal well all at least needs 10,000,000
RMB, drilling cost is expensive, adds development cost；(2) need to carry out pressure break after boring two mouthfuls of wells, the pressure break of 1000m long is taken
6,000,000 are needed with general, the somewhat expensive of pressure break, adds development cost.Analyzed based on more than, xeothermic lithotype geothermal energy development
It is with high costs, thus compel to need we research and develop a kind of need bung down and meanwhile be not required pressure break mode just can mining geothermal energy skill
Art, xeothermic lithotype geothermal energy development cost is reduced with this.
Analyzed based on more than, the utility model patent devises a kind of enhanced underground heat completion system of standing column well, it is intended to
Vacancy of the China in enhanced geothermal system completion method is filled up, compared with existing development scheme, which only needs to bore flatly
Pressure break is not required in well, and geothermal energy is absorbed by the circulation of water body, and geothermal energy is reduced by the design of the development system
Development cost, to realize safe efficient, sustainable, the inexpensive development and utilization to geothermal energy.
Utility model content
The utility model aim is to provide a kind of standing column well enhanced underground heat completion system for enhanced geothermal system,
Geothermal energy resources are more efficiently developed with this.
In order to achieve the above object, the utility model adopts the following technical scheme：
A kind of enhanced underground heat completion system of standing column well is mainly by surface pipe, ordinary skill casing, high temperature resistant technology
Casing, preforation tunnel, oil pipe and high temperature resistant centralizer composition.
A kind of enhanced underground heat completion system of standing column well, passes through the ring formed on ground to ordinary skill casing and oil pipe
Water is injected in shape space, water flows to borehole bottom by the annular space that ordinary skill casing and oil pipe are formed from top toward lower part
When enter preforation tunnel, by preforation tunnel enter oil pipe in, water in oil pipe from lower to upper part flow, then flow to ground
Reception device；For geothermal reservoir temperature more than 200 DEG C, reservoir heat is delivered to high temperature resistant technology set by high temperature resistant protective casing
The annular space that pipe is formed with oil pipe, when water flows in the annular space that high temperature resistant protective casing and oil pipe are formed, absorbs resistance to
Heat in the annular space that high-temperature technology casing is formed with oil pipe, water body form high-temperature water by heat absorption, and high-temperature water passes through again
Oil pipe flows to ground receiving wastewater facility and generates electricity.
A kind of enhanced underground heat completion system of standing column well, feature have：The casing programme that completion uses is horizontal well type, water
The horizontal section length of horizontal well reaches 2000m, is flowed from the water of ground injection in the annular space that ordinary skill casing is formed with oil pipe
It is out-of-date, there is longer time to absorb the heat being delivered to from geothermal reservoir rock in the annular space, by diabatic process, institute
Stating water in annular space, when flowing at preforation tunnel, temperature is very high, and hereafter, high-temperature water is flowed into oil pipe by eyelet,
Flow from bottom to top, flow out to ground.
The horizontal segment of oil pipe uses heat-resisting material, and the vertical section of oil pipe uses common material, but in the vertical section of oil pipe
Heat insulating coat is respectively scribbled on wall and outer wall, in order to reach the insulation effect to oily liquid in pipe, because there is certain ground temperature on stratum
Gradient, stratum is deeper, and temperature is higher, and similarly, stratum is more shallow, and temperature is lower, therefore in vertical boreholes section formation temperature from bottom to top
It is more and more lower, it is that temperature is about 10 DEG C or so to ground, so respectively scribbling heat-insulated painting on the vertical section inner and outer wall of oil pipe
Water distributes heat to layer in vertical section oil Bottomhole pressure in order to prevent.
By grout off, which prevents water flowing into geothermal reservoir for the bottom of protective casing and oil pipe, but
Protective casing is allowed to be flowed into the water in the annular space of oil pipe formation by preforation tunnel in oil pipe.
The horizontal segment of oil pipe is provided with eyelet close to bottom position, the annular sky which forms for protective casing with oil pipe
Between in current oil inlet pipe provide passage.
The horizontal component of oil pipe is provided with high temperature resistant centralizer in geothermal reservoir, and high temperature resistant centralizer is installed around oil pipe
Be in order to make horizontal segment oil pipe be placed centrally in the protective casing of horizontal segment because gravity, when no external force acts on, water
Flat section oil pipe can be close to the lower position at protective casing interface so that oil pipe distance technique ferrule interface lower part is relatively near, apart from skill
Art ferrule interface top farther out because around protective casing being the High temperature rocks in geothermal reservoir, when oil pipe is not placed in the middle,
Also farther out, heat transfer efficiency reduces the rock on oil pipe distance technique ferrule interface top, therefore after high temperature resistant centralizer is installed, oil
Pipe is placed in the middle in protective casing, and heat-transfer effect is preferable.
The utility model has the following advantages：(1) ground normal-temperature water is entered oil by the utility model by the annular space
Pipe, then flow to ground, which realizes closed circulation, completion well bore knot of the closed circulation in individual well by oil pipe
Realized in structure, cost is relatively low；(2) in the utility model long section horizontal well design absorb heat for water in flow process provide it is longer
Time, reaches preferable heat transfer effect, and no longer needs to reach by pressing crack construction higher heat transfer effect, significantly reduces
Underground heat cost of winning.
Brief description of the drawings
Attached drawing 1 is the utility model structure diagram.
Figure label：Surface pipe 1, ordinary skill casing 2, high temperature resistant protective casing 3, high temperature resistant centralizer 4, oil pipe 5,
Annular space 8, cement plug 9, high temperature resistant cement 10, the cement that preforation tunnel 6, high-temperaure coating 7, protective casing and oil pipe are formed
11。
Embodiment
Below in conjunction with attached drawing 1, the utility model is described in detail, it is as follows：
A kind of enhanced underground heat completion system of standing column well, main surface pipe 1, ordinary skill casing 2, high temperature resistant technology
The annular space that casing 3, high temperature resistant centralizer 4, oil pipe 5, preforation tunnel 6, high-temperaure coating 7, protective casing and oil pipe are formed
8th, cement plug 9 forms.
The utility model is in the case where the parameters such as heat reservori geographical location, orientation, depth determine, with the side of horizontal well
Formula is bored and turned up the soil heat reservori, is sequentially straight well, deflecting and horizontal well.Spud in the predetermined area；Institute's drilling well is two boiling water horizontal wells, is used
Horizontal well technology can fully increase pit shaft and stratum heat exchange area, and horizontal segment can reach away from more than well head horizontal distance 2000m
Scope；Spudded in using the drill bit of 310.9mm, one open tripping in 244.3mm surface pipes 1 after cementing 11 cement the well, it is therefore an objective to every
From top layer complicated geological structure；Two open and are drilled into kickoff point (KOP) top using 215.9mm drill bits, are then bored using 215.9mm high temperature resistants
Head carries out deflecting and moves towards distance more than extending level section 2000m along reservoir.If unstable sedimentary rock, on kickoff point (KOP)
Portion with tripping in 177.8mm ordinary skills casing 2 and can carry out cementing 11 and cement the well, kickoff point (KOP) lower part tripping in 177.8mm high temperature resistants
Protective casing 3 simultaneously notes high temperature resistant cement 10 and cements the well.
Then tripping in oil pipe 5, oil pipe 5 are a kind of oil pipes 5 that a kind of inside and outside tubing wall has high-temperaure coating 7, high temperature resistant
Coating 7 is made of the aviation heat-barrier material with some strength, and high-temperaure coating 7 can prevent the high-temp liquid in oil pipe 5 from dissipating
Heat, plays insulation effect.The oil pipe 5 of 101.6mm can be used below kickoff point (KOP) at the same time using high temperature resistant centralizer 4 to lower part oil
Pipe 5 carries out between two parties, more than kickoff point (KOP) can use the oil pipe 5 of 139.7mm, and oil pipe 5 can isolate internal and external environment, ensure oil
The temperature of vapor in pipe 5 remains unchanged.
In the high temperature resistant cement 10 of ground injection certain volume, the insulating liquid of certain volume is subsequently injected into, is pushed away by clear water
Move to 5 bottom of oil pipe, high-temperature cement 10 and solidified in 5 bottom of oil pipe, it is therefore an objective to shaft bottom oil pipe 5 is kept middle position, to ensure
There is the thermal conversion efficiency of higher during exploitation.
Perforation is carried out to 5 bottom of oil pipe from subsurface entrance aperture rifle, six preforation tunnels 4, oil pipe are formed in 5 bottom of oil pipe
5 connect with high temperature resistant casing 3, and preforation tunnel 4 is uniformly distributed on 5 wall of oil pipe, the sum of area of six preforation tunnels 4 and oil
5 inner section of pipe product is equal, ensures that vapor enters oil pipe 5 with uniform flow rate with this.
A kind of enhanced underground heat completion system of standing column well is on ground into ordinary skill casing 2 and 5 annular space 8 of oil pipe
Inject water, water by ordinary skill casing 2 and 5 annular space 8 of oil pipe from top toward lower part flow to borehole bottom when into entrance aperture
Eyelet 4, is entered in oil pipe 5 by preforation tunnel 4, and water flows in oil pipe 5 from lower to upper part, then flows to ground receiver
Device；For geothermal reservoir temperature more than 200 DEG C, reservoir heat is delivered to high temperature resistant protective casing 3 by high temperature resistant protective casing 3
With 5 annular space 8 of oil pipe, when water flows in high temperature resistant protective casing 3 and 5 annular space 8 of oil pipe, high temperature resistant technology set is absorbed
Pipe 3 flows to ground by oil pipe 5 again with the heat in 5 annular space 8 of oil pipe, water body by being thermally formed high-temperature water, high-temperature water
Reception device generates electricity.
Claims (1)
- A kind of 1. enhanced underground heat completion system of standing column well, it is characterised in that：Completion casing programme by vertical section, bending section and Horizontal segment forms；The bottom of protective casing and oil pipe passes through grout off；The horizontal segment of the protective casing uses high temperature resistant skill Art casing；The horizontal segment of the oil pipe uses high temperature resistant oil pipe；The horizontal segment of the oil pipe is provided with eyelet close to bottom position； Tube wall scribbles thermal insulation layer inside and outside the vertical section of the oil pipe；High temperature resistant centralizer is installed on the horizontal component of the oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720213647.1U CN207348838U (en) | 2017-03-06 | 2017-03-06 | A kind of enhanced underground heat completion system of standing column well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720213647.1U CN207348838U (en) | 2017-03-06 | 2017-03-06 | A kind of enhanced underground heat completion system of standing column well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207348838U true CN207348838U (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720213647.1U Expired - Fee Related CN207348838U (en) | 2017-03-06 | 2017-03-06 | A kind of enhanced underground heat completion system of standing column well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894804A (en) * | 2017-03-06 | 2017-06-27 | 中国石油集团钻井工程技术研究院 | A kind of enhanced geothermal system completion method of standing column well |
| CN110924865A (en) * | 2019-11-26 | 2020-03-27 | 中国石油大学(北京) | Method and system for cyclic development and utilization of hydrothermal geothermal energy in same horizontal well |
| WO2020113914A1 (en) * | 2018-12-05 | 2020-06-11 | 田振林 | Process for improving heat production capacity of geothermal well |
| CN111911087A (en) * | 2020-07-22 | 2020-11-10 | 中国石油集团工程技术研究院有限公司 | Well body structure penetrating through high-pressure layer and basalt collapsed layer and construction method of well body structure |
-
2017
- 2017-03-06 CN CN201720213647.1U patent/CN207348838U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894804A (en) * | 2017-03-06 | 2017-06-27 | 中国石油集团钻井工程技术研究院 | A kind of enhanced geothermal system completion method of standing column well |
| WO2020113914A1 (en) * | 2018-12-05 | 2020-06-11 | 田振林 | Process for improving heat production capacity of geothermal well |
| CN110924865A (en) * | 2019-11-26 | 2020-03-27 | 中国石油大学(北京) | Method and system for cyclic development and utilization of hydrothermal geothermal energy in same horizontal well |
| CN110924865B (en) * | 2019-11-26 | 2020-11-03 | 中国石油大学(北京) | Method and system for cyclic development and utilization of hydrothermal geothermal energy in same horizontal well |
| CN111911087A (en) * | 2020-07-22 | 2020-11-10 | 中国石油集团工程技术研究院有限公司 | Well body structure penetrating through high-pressure layer and basalt collapsed layer and construction method of well body structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 Termination date: 20190306 |
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| CF01 | Termination of patent right due to non-payment of annual fee |