CN108868594A - Penetrate shape well pattern geothermal energy urban heat supplying method - Google Patents
Penetrate shape well pattern geothermal energy urban heat supplying method Download PDFInfo
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- CN108868594A CN108868594A CN201810670309.XA CN201810670309A CN108868594A CN 108868594 A CN108868594 A CN 108868594A CN 201810670309 A CN201810670309 A CN 201810670309A CN 108868594 A CN108868594 A CN 108868594A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 230000018109 developmental process Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 238000010792 warming Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses one kind to penetrate shape well pattern geothermal energy urban heat supplying method, the program is divided into ground and the part of underground two, underground system follows the principle of " heat is taken not fetch water ", cold fluid is injected from main borehole, fluid circulation flows out around to shaft bottom and in " radial ", fluid flows into horizontal well well section from main borehole, in flow process, underground heat heats cold fluid automatically, a large amount of thermal energy is carried by automatic heated fluid, finally urban heating system is discharged into from horizontal well well head, it is recycled by ground is a series of, the energy that fluid carries is utilized completely, main borehole is returned to by ground pipeloop, successively reciprocation cycle.Compared with prior art, strong operability of the present invention is, it can be achieved that produce the efficient utilization of geothermal energy, while realize underground point to multi--point penetrates shape well network design, is also an innovation on drilling technology and theoretical developments.
Description
Technical field
The present invention relates to a kind of Oil-Gas Well Engineering fields more particularly to one kind to penetrate shape well pattern geothermal energy urban heat supplying method.
Background technique
China is an energy-consuming big country, and traditional energy consumption is huge, brings a series of environmental problem.Geothermal energy
It is a kind of green low-carbon, recyclable renewable energy, has that reserves are big, distribution is wide, clean and environmental protection, the spies such as reliable and stable
Point, is a kind of practicable and competitive clean energy resource, and Speeding up development utilizes geothermal energy, to readjusting the energy structure, save
Energy emission reduction, improvement environment are of great significance.
Different thermal energy extracting modes is mainly taken in the utilization of geothermal energy according to the difference of depth at present, with mainly having shallow-layer
Using technology, the buried tubular type extractive technique of mid-deep strata geothermal energy etc., these technologies exist for heat energy heat pump technology, mid-deep strata geothermal fluid
To a certain extent can be mined by geothermal energy, but without forming a complete ground underground fluid circulatory system, together
When the energy that obtains be not utilized, or even also result in groundwater balance imbalance.
Summary of the invention
The object of the invention is that providing one kind to solve the above-mentioned problems and penetrating shape well pattern geothermal energy urban heat supplying side
Method.
The present invention is achieved through the following technical solutions above-mentioned purpose：
The present invention includes the following steps：
(1) geologic prospect determines the distribution situation of urban gertherm energy；
(2) geothermal well is bored in the suitable position design according to distribution situation in the city, which meets following two item
Part：
1) mineshaft diameter is larger；
2) it is located at the center of heating area as far as possible；
(3) 4 mouthfuls of water horizontal wells are designed on four boundaries of heating area centered on geothermal well main borehole, target spot is underground heat
Well main borehole；
(4) using sealing fluid processing is sealed to pit shaft junction after the completion of docking, then respectively from each horizontal well into
Row drifting；
(5) the well head external transport pipeline of 4 mouthfuls of water horizontal wells is connected with the pipeline of urban heating system respectively, stratum and well
Thus fluid in cylinder enters the urban heat supplying circulatory system；
(6) fluid flows back into geothermal well after earth's surface completes a series of circulation by surface line.
The program is divided into ground and the part of underground two, and underground system follows the principle of " heat is taken not fetch water ", cold fluid from
Main borehole injection, fluid circulation to shaft bottom are simultaneously flowed out in " radial " around, and fluid flows into horizontal well well section from main borehole,
In flow process, underground heat heats cold fluid automatically, a large amount of thermal energy is carried by automatic heated fluid, finally from horizontal well
Well head is discharged into urban heating system, recycles by ground is a series of, and the energy that fluid carries is utilized completely, after
Main borehole is returned to through ground pipeloop, successively reciprocation cycle.
The beneficial effects of the present invention are：
The present invention is that one kind penetrates shape well pattern geothermal energy urban heat supplying method, compared with prior art, operability of the present invention
Strong while realize underground point to multi--point penetrates shape well network design, it can be achieved that produce the efficient utilization of geothermal energy, in drilling well
It is also an innovation in technology and theoretical developments.
Detailed description of the invention
Fig. 1 is the schematic diagram for penetrating shape well pattern geothermal energy urban heat supplying scheme of the invention；
Fig. 2 is flow chart of the method for the present invention.
In Fig. 1：1- covering heating area, 2- geothermal well main borehole, 3- horizontal well wellbore, 4- underground fluid flowing side
To the flow direction of, 5- surface fluids.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings：
As shown in Figure 1：1 it is the heating area of covering in figure, 2 be geothermal well main borehole, 3 be horizontal well wellbore, 4 is underground
The flow direction of fluid, 5 be surface fluids flow direction.
Specific method includes the following steps：
(7) geologic prospect determines the distribution situation of urban gertherm energy；
(8) geothermal well is bored in the suitable position design according to distribution situation in the city, which meets following two item
Part：
3) mineshaft diameter is larger；
4) it is located at the center of heating area as far as possible；
(9) 4 mouthfuls of water horizontal wells are designed on four boundaries of heating area centered on geothermal well main borehole, target spot is underground heat
Well main borehole；
(10) using sealing fluid processing is sealed to pit shaft junction after the completion of docking, then respectively from each horizontal well into
Row drifting；
(11) the well head external transport pipeline of 4 mouthfuls of water horizontal wells is connected with the pipeline of urban heating system respectively, stratum and
Thus fluid in pit shaft enters the urban heat supplying circulatory system；
(6) fluid flows back into geothermal well after earth's surface completes a series of circulation by surface line.
Design principle of the invention：
The density of population of one city different zones is different, big according to the principle design level wellbore of the equilibrium of supply and demand
Small, the bigger region of the density of population, the heat that when warming needs is more, and in the region, design uses major diameter horizontal well；
The smaller region of the density of population, the heat that warming needs is fewer, and in the region, design uses minor diameter horizontal well.Cold fluid
When being recycled to shaft bottom from main hole inflow, fluid will distribute automatically the stream of each horizontal well according to the size of hole diameter in shaft bottom
Amount, to realize the equilibrium of supply and demand of heat and efficiently utilize to the geothermal energy produced, avoids unnecessary thermal loss.Tool
Body design is as follows：
The determination of thermic load:
The thermic load in cold season each region is required with meeting the minimum heating of region resident as principle, it is assumed that in local-style dwelling houses 70 years
The population of a region resident remains unchanged, and ignores the influence of secondary cause, thermic load is the function of population, and then can be counted
Calculate total amount of heat required for the warming of each region.
The specific design for penetrating shape well pattern is realized：
The present invention determines the position of inlet well and wet well according to the actual state in city, as far as possible using shape well pattern is penetrated
The entire heating area of covering.The insufficient problem of the geothermal energy utilization produced at present is than more prominent, with economy in design
The principle of the equilibrium of supply and demand in determines the region lateral wellbore according to limit highest heat needed for the region warming
Size, realize a degree of equilibrium of supply and demand, successively determine the size of remaining each branch well hole.The key of the design is point
Branch wellbore is docked with the accurate of main borehole, carries out reaming hole to vertical well target interval first with the first-class tool of reamer, then
It is put into the instrument being made of three axis accelerators and three axis magnetoresistive sensors in vertical well reaming hole interval, for measuring permanent magnetic field
The magnetic field of generation.During horizontal well drilling, the permanent magnet of rotation generates an alternating magnetic field, the measuring instrument in vertical well
After measuring changing magnetic field, the current location of horizontal well drill can be determined after calculating, vertical well controls people
Member is according to the drilling for calculating data control next step, to realize that each branch well hole is docked with the accurate of main borehole.
Pit shaft sealing is divided into junction sealing and annular space sealing.Junction sealing：It is accurately right for main borehole, branch well hole
Sealing fluid is directlyed adopt after connecing and is sealed processing, then carries out drifting operation；Annular space sealing：1. underground heat is into and out of well
Surface pipe, protective casing use the sealing of High Performance Adiabatic material, reduce heat exchange；2. being adopted below underground heat wet well protective casing
With High-performance heat conduction material sealing, to increase heat exchanger effectiveness.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1. one kind penetrates shape well pattern geothermal energy urban heat supplying method, it is characterised in that：Include the following steps：
(1) geologic prospect determines the distribution situation of urban gertherm energy；
(2) geothermal well is bored in the suitable position design according to distribution situation in the city, which meets following two condition：
1) mineshaft diameter is larger；
2) it is located at the center of heating area as far as possible；
(3) 4 mouthfuls of water horizontal wells are designed on four boundaries of heating area centered on geothermal well main borehole, target spot is geothermal well master
Wellbore；
(4) processing is sealed to pit shaft junction using sealing fluid after the completion of docking, then is led to respectively from each horizontal well
Well；
(5) the well head external transport pipeline of 4 mouthfuls of water horizontal wells is connected with the pipeline of urban heating system respectively, in stratum and pit shaft
Fluid thus enter the urban heat supplying circulatory system；
(6) fluid flows back into geothermal well after earth's surface completes a series of circulation by surface line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810670309.XA CN108868594A (en) | 2018-06-26 | 2018-06-26 | Penetrate shape well pattern geothermal energy urban heat supplying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810670309.XA CN108868594A (en) | 2018-06-26 | 2018-06-26 | Penetrate shape well pattern geothermal energy urban heat supplying method |
Publications (1)
| Publication Number | Publication Date |
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| CN108868594A true CN108868594A (en) | 2018-11-23 |
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| CN201810670309.XA Pending CN108868594A (en) | 2018-06-26 | 2018-06-26 | Penetrate shape well pattern geothermal energy urban heat supplying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111523171A (en) * | 2020-04-30 | 2020-08-11 | 西安石油大学 | Method for optimizing wellhead position of shooting-shaped well type geothermal well |
| CN113279728A (en) * | 2021-06-04 | 2021-08-20 | 中国地质科学院勘探技术研究所 | Medium-deep geothermal energy closed heat exchange structure and process method thereof |
Citations (5)
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|---|---|---|---|---|
| CN101629485A (en) * | 2009-06-17 | 2010-01-20 | 中国地质科学院勘探技术研究所 | Exploitation method of communication well of geothermal energy bore well |
| CN102635966A (en) * | 2012-05-03 | 2012-08-15 | 张宇 | System for utilizing geothermal energy of earthquake-weakened/averted deep water injection wells |
| CN103090571A (en) * | 2013-01-06 | 2013-05-08 | 姚亚明 | Method of circular mining geothermal resources |
| CN206803542U (en) * | 2017-05-22 | 2017-12-26 | 西安浩沃新能源有限公司 | A kind of porous geothermal well system of large span |
| KR20180013355A (en) * | 2016-07-29 | 2018-02-07 | 한국지질자원연구원 | Enhanced Geothermal System Used For Deep Geothermal Power Generation Systems |
-
2018
- 2018-06-26 CN CN201810670309.XA patent/CN108868594A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629485A (en) * | 2009-06-17 | 2010-01-20 | 中国地质科学院勘探技术研究所 | Exploitation method of communication well of geothermal energy bore well |
| CN102635966A (en) * | 2012-05-03 | 2012-08-15 | 张宇 | System for utilizing geothermal energy of earthquake-weakened/averted deep water injection wells |
| CN103090571A (en) * | 2013-01-06 | 2013-05-08 | 姚亚明 | Method of circular mining geothermal resources |
| KR20180013355A (en) * | 2016-07-29 | 2018-02-07 | 한국지질자원연구원 | Enhanced Geothermal System Used For Deep Geothermal Power Generation Systems |
| CN206803542U (en) * | 2017-05-22 | 2017-12-26 | 西安浩沃新能源有限公司 | A kind of porous geothermal well system of large span |
Non-Patent Citations (1)
| Title |
|---|
| 段云星: "干热岩地热资源开采井网优化数值模拟研究", 《中国优秀硕士学位论文全文数据库 基础科学辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111523171A (en) * | 2020-04-30 | 2020-08-11 | 西安石油大学 | Method for optimizing wellhead position of shooting-shaped well type geothermal well |
| CN111523171B (en) * | 2020-04-30 | 2023-07-25 | 西安石油大学 | Method for optimizing wellhead position of radial well type geothermal well |
| CN113279728A (en) * | 2021-06-04 | 2021-08-20 | 中国地质科学院勘探技术研究所 | Medium-deep geothermal energy closed heat exchange structure and process method thereof |
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Application publication date: 20181123 |
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