CN109577930A - Two-way geothermal well and hoistway fracturing crack method for communicating - Google Patents
Two-way geothermal well and hoistway fracturing crack method for communicating Download PDFInfo
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- CN109577930A CN109577930A CN201811522532.6A CN201811522532A CN109577930A CN 109577930 A CN109577930 A CN 109577930A CN 201811522532 A CN201811522532 A CN 201811522532A CN 109577930 A CN109577930 A CN 109577930A
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- China
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- well
- geothermal
- producing well
- water injection
- hoistway
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention discloses a kind of two-way geothermal well and hoistway fracturing crack method for communicating, the two-way geothermal well includes water injection well, first producing well and the second producing well, filling pipe is set between water injection well and the first producing well, geothermal heat pipeline is set between first producing well and the second producing well, filling pipe and geothermal heat pipeline pass through the electric discharge progress hoistway fracturing crack connection between high-field electrode and low-field electrode, and distich entire crack line is extended, the present invention realizes the systematicness arrangement of fracturing crack, working fluid can be made to carry out more fully heat with geothermal layer by the connection crackle after extension to exchange, improve the band heat of working fluid in hoistway, the quantity of hoistway can be reduced simultaneously, reduce cost of winning.
Description
Technical field
The present invention relates to underground heat production technique field more particularly to a kind of two-way geothermal well and hoistway fracturing crack connection sides
Method.
Background technique
In future source of energy development field, geothermal energy increasingly becomes a kind of extremely competitive renewable resource, with
Era development, traditional fossil energy pollution environment, it is deficient the problems such as get worse, develop and make full use of emerging cleaning can be again
The raw energy is that world situation is become, and is needed for national development, while being also in response to the great heat such as " global warming ", " energy-saving and emission-reduction "
The behave of point problem, the practical problem currently faced to solution have important practical significance.
The development technique of high temperature geothermal energy resources is not yet mature at present, mainly by toward underground transportation work medium water come
Extract geothermal energy resources.For the production technique in current underground heat field, there are pure artificial fracturing, intrinsic fracture-artificial fracturing, individual well to open
It adopts and the exploitation of the methods of Multilateral Wells.Most of underground heat well constructions are " individual well is applied alone ", " one area of a well ", are based on hot dry rock resource
High efficiency, in following using energy source, the development mode in " individual well is applied alone ", " one area of a well " will be difficult to meet national energy again
Source utilizes the low-carbon environment-friendly specification planned；It is analyzed simultaneously by science data, although the application of volume fracturing technology is in certain journey
Geothermal energy resources harvesting utilization rate is improved on degree, but due to the scrambling of pressure break rock seam, the rock seam of effective use is less, heat storage
Difficulty is larger, and heat exchange effect is poor.
Summary of the invention
The purpose of the present invention is to provide a kind of two-way geothermal well and hoistway fracturing crack method for communicating, by electric in hoistway
The crackle method for communicating of pole electric discharge realizes the systematicness arrangement of fracturing crack, and is extended to it, can make work by crackle
Make liquid to exchange with geothermal layer progress more fully heat, improve the band heat of working fluid in hoistway, while well can be reduced
The quantity in road reduces cost of winning.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: two-way geothermal well and hoistway fracturing crack connection side
Method, comprising the following steps:
S1 geothermal layer position and underground area coverage) are determined by geology detecting, choose water injection well rational position；
S2) according to the position of water injection well position Rational choice the first producing well and the second producing well, water injection well, the first producing well and
The central axes of second producing well are in the same plane, and water injection well is between the first producing well and the second producing well；
S3) water injection well, the first producing well and the second producing well have carried out well after creeping into geothermal layer, and complete well is low using keeping the temperature
Heat transfer coefficient production technology casing；
S4) water injection well, the first producing well and the second producing well continue to be drilled down into, and water injection well is crept into geothermal layer certain depth
Completion, the first producing well and the second producing well continue to be drilled down into same even depth；
S5) by filling pipe complete water injection well and the first producing well connection, by geothermal heat pipeline complete the first producing well and
The connection of second producing well, filling pipe are parallel to each other with geothermal heat pipeline, and its central axes is located in same vertical plane, to water filling
Pipe, the first production pipe and the second production pipe, which are located in geothermal layer, uses high heat transfer coefficient production technology cased hole completion；
S6 it) is protruded into high-field electrode to filling pipe in water injection well, low-field electrode is protruded into the first producing well to geothermal tube
In road, be in high-field electrode and low-field electrode in same vertical plane, carry out discharge operation, to filling pipe and geothermal heat pipeline it
Between crackle carry out connection and extension；
S7 the position for) adjusting high-field electrode and low-field electrode, can carry out multiple crackles between filling pipe and geothermal heat pipeline
Connection and extension, the connection crackle after extension penetrate through filling pipe and geothermal heat pipeline in the vertical direction；
S8 drinking-water pipe is set in) tripping in water inlet pipe in water injection well, the first producing well and the second producing well.
Further, apply differential voltage between high-field electrode and low-field electrode, between high-field electrode and low-field electrode
Voltage difference be greater than 100000V.
Further, differential voltage is applied in the form of the duration is less than multiple pulses of 500 nanoseconds.
Further, the evaporation under differential voltage effect of at least part of stratum forms connection crackle in crackle.
Further, the extension multiple of connection crackle is 2-100 times, and extension multiple is connection crackle mean gap after extension
With the ratio of crackle mean gap before connection.
Further, the connection crackle after extension is substantially parallel.
Further, drinking-water pipe is at away from 2 .5m of ground across heat preservation low heat transfer coefficient production technology casing turning water conservancy diversion.
Compared with prior art, the present invention has the following beneficial effects:
1. injecting working fluid using water injection well, two mouthfuls of producing well Collaboration of two sides of living apart are conducive to different regions underground heat
The comprehensive utilization of resource, while eliminating and corresponding filling pipe is set in the second producing well side, it is possible to reduce hoistway
Quantity reduces cost of winning；
2. realizing the systematicness arrangement of fracturing crack by the crackle method for communicating of electrode discharge in hoistway, be conducive in geothermal layer
The guiding performance of heat is conducted, and it is extended to crackle, by the crackle after extension can make working fluid and geothermal layer into
Row more fully heat exchanges, and improves the band heat of working fluid in hoistway.
Detailed description of the invention
Fig. 1 is diagrammatic cross-section of the invention.
Fig. 2 is the schematic diagram of electrode fracturing crack connection of the present invention；
In figure, 1. water injection wells；2. the first producing well；3. the second producing well；4. filling pipe；5. geothermal heat pipeline；6. connection crackle；
7. water inlet pipe；8. drinking-water pipe；9. geothermal layer；10. ground；11. high-field electrode；21. low-field electrode.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
As shown in Figure 1 to Figure 2, two-way geothermal well and hoistway fracturing crack method for communicating, comprising the following steps:
S1 9 position of geothermal layer and underground area coverage) are determined by geology detecting, choose 1 rational position of water injection well；
S2) according to the position of 1 position Rational choice the first producing well 2 and the second producing well 3 of water injection well, water injection well 1, first is produced
The central axes of well 2 and the second producing well 3 are in the same plane, and water injection well 1 is located at the first producing well 2 and the second producing well 3
Between；
S3 well) has been carried out after water injection well 1, the first producing well 2 and the second producing well 3 drilling to 9 top of geothermal layer, complete well is using guarantor
Warm low heat transfer coefficient production technology casing；
S4) water injection well 1, the first producing well 2 and the second producing well 3 continue to be drilled down into, the drilling of water injection well 1 in geothermal layer 9 one
It completes after depthkeeping degree, the first producing well 2 and the second producing well 3 continue to be drilled down into same even depth；
S5 the connection that water injection well 1 and the first producing well 2) are completed by filling pipe 4 completes the first production by geothermal heat pipeline 5
The connection of well 2 and the second producing well 3, filling pipe 4 are parallel to each other with geothermal heat pipeline 5, and its central axes is located at same vertical plane
It is interior, pipe 2 is produced to water injection pipe 1, first and the second production pipe 3 is located in geothermal layer 9 using high heat transfer coefficient production technology casing
Complete well；
S6) protruded into water injection well 1 in high-field electrode 11 to filling pipe 4, protruded into the first producing well 2 low-field electrode 21 to
It in geothermal heat pipeline 5, is in high-field electrode 11 and low-field electrode 21 in same vertical plane, discharge operation is carried out, to filling pipe 4
Crackle between geothermal heat pipeline 5 carries out connection and extension；
S7 the position of high-field electrode 11 and low-field electrode 21) is adjusted, multiple between filling pipe 4 and geothermal heat pipeline 5 can be split
Line carries out connection and extension, the connection crackle 6 after extension penetrate through filling pipe 4 and geothermal heat pipeline 5 in the vertical direction；
Drinking-water pipe 8 is set in S8) tripping in water inlet pipe 7 in water injection well 1, the first producing well 2 and the second producing well 3.
Apply differential voltage between high-field electrode 11 and low-field electrode 21, between high-field electrode 11 and low-field electrode 21
Voltage difference is greater than 100000V, and differential voltage is applied in the form of the duration is less than multiple pulses of 500 nanoseconds, crackle
In the evaporation under differential voltage effect of at least part of stratum form connection crackle 6, the extension multiple of connection crackle 6 is 2-
100 times, extension multiple is the ratio of 6 mean gap of connection crackle and crackle mean gap before connection after extension, after multiple extensions
Connection crackle 6 it is substantially parallel.
Drinking-water pipe 8 passes through heat preservation low heat transfer coefficient production technology casing turning water conservancy diversion at ground 10.
Working fluid is entered 4 in filling pipe by the water inlet pipe 7 of water injection well 1, passes through high heat transfer coefficient production technology set
Pipe carries out heat with geothermal layer 9 and exchanges, and due to the presence of connection crackle 6, accelerates geothermal layer 9 to working solution in filling pipe 4
The heat transfer rate of body, while heat transfer amount is increased, heat transfer effect is improved, working fluid can be raw by first
The liquid suction pipe 8 produced in well 2 is transported to destination；Meanwhile the working efficiency of adjustable water inlet pipe 7 and liquid suction pipe 8, make to infuse
Working fluid part in waterpipe 4 via geothermal heat pipeline 5 from the second producing well 3 with being delivered to another object, this part work
Heat conduction efficiency can equally be accelerated by the effect of connection crackle 6 in geothermal heat pipeline 5, promote amount of heat transfer by making liquid；Also may be used
The liquid suction pipe 8 in wherein a certain producing well is closed, working fluid is all introduced into a certain designated destination.
It is filled the water using a well, two mouthfuls of producing well Collaboration improve heat utilization ratio, are conducive to the ground of satellite town
Thermal resource comprehensive utilization, while eliminating and corresponding filling pipe is set in 3 side of the second producing well, it is possible to reduce hoistway
Quantity reduces cost of winning；The systematicness arrangement of fracturing crack is realized by the crackle method for communicating of electrode discharge in hoistway,
Be conducive to the guiding performance conduction of heat in geothermal layer, and it is extended, working fluid can be made by the crackle after extension
More fully heat is carried out with geothermal layer to exchange, and improves the band heat of working fluid in hoistway.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (7)
1. two-way geothermal well and hoistway fracturing crack method for communicating, which comprises the following steps:
S1 geothermal layer (9) position and underground area coverage) are determined by geology detecting, choose water injection well (1) rational position；
S2) according to the position of water injection well (1) position the first producing well of Rational choice (2) and the second producing well (3), water injection well (1),
The central axes of first producing well (2) and the second producing well (3) are in the same plane, and water injection well (1) is located at the first producing well
(2) between the second producing well (3)；
S3 well) has been carried out after water injection well (1), the first producing well (2) and the second producing well (3) drilling to geothermal layer (9) top, it is complete
Well is using heat preservation low heat transfer coefficient production technology casing；
S4) water injection well (1), the first producing well (2) and the second producing well (3) continue to be drilled down into, water injection well (1) drilling to underground heat
It completes after layer (9) interior certain depth, the first producing well (2) and the second producing well (3) continue to be drilled down into same even depth；
S5 the connection that water injection well (1) and the first producing well (2)) are completed by filling pipe (4), is completed by geothermal heat pipeline (5)
The connection of first producing well (2) and the second producing well (3), filling pipe (4) is parallel to each other with geothermal heat pipeline (5), and its axis
Line is located in same vertical plane, and the portion of geothermal layer (9) is located to water injection pipe (1), the first production pipe (2) and the second production pipe (3)
Divide and uses high heat transfer coefficient production technology cased hole completion；
S6 it) is protruded into water injection well (1) in high-field electrode (11) to filling pipe (4), protrudes into low pressure in the first producing well (2)
In electrode (21) to geothermal heat pipeline (5), it is in high-field electrode (11) and low-field electrode (21) in same vertical plane, discharges
Operation carries out connection and extension to the crackle between filling pipe (4) and geothermal heat pipeline (5)；
S7 the position for) adjusting high-field electrode (11) and low-field electrode (21), can be between filling pipe (4) and geothermal heat pipeline (5)
Multiple crackles carry out connection and extension, the connection crackle (6) after extension and penetrate through filling pipe (4) and underground heat in the vertical direction
Pipeline (5)；
S8 drinking-water pipe (8) are set in) tripping in water inlet pipe (7) in water injection well (1), the first producing well (2) and the second producing well (3).
2. two-way geothermal well according to claim 1 and hoistway fracturing crack method for communicating, which is characterized in that in high-voltage electricity
Apply differential voltage between pole (11) and low-field electrode (21), the voltage difference between high-field electrode (11) and low-field electrode (21) is big
In 100000V.
3. two-way geothermal well according to claim 2 and hoistway fracturing crack method for communicating, which is characterized in that differential voltage
It is applied in the form of the duration is less than multiple pulses of 500 nanoseconds.
4. two-way geothermal well according to claim 2 and hoistway fracturing crack method for communicating, which is characterized in that in crackle extremely
The evaporation under differential voltage effect of at least part of stratum forms connection crackle (6).
5. two-way geothermal well according to claim 2 and hoistway fracturing crack method for communicating, which is characterized in that connection crackle
(6) extension multiple is 2-100 times, extension multiple be after extension before connection crackle (6) mean gap and connection crackle averagely between
The ratio of gap.
6. two-way geothermal well according to claim 1 and hoistway fracturing crack method for communicating, which is characterized in that multiple extensions
Connection crackle (6) afterwards is substantially parallel.
7. two-way geothermal well according to claim 1 and hoistway fracturing crack method for communicating, which is characterized in that drinking-water pipe
(8) heat preservation low heat transfer coefficient production technology casing turning water conservancy diversion is passed through at ground (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811522532.6A CN109577930A (en) | 2018-12-13 | 2018-12-13 | Two-way geothermal well and hoistway fracturing crack method for communicating |
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| CN201811522532.6A CN109577930A (en) | 2018-12-13 | 2018-12-13 | Two-way geothermal well and hoistway fracturing crack method for communicating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952928A (en) * | 2019-09-27 | 2020-04-03 | 中煤科工集团西安研究院有限公司 | Well completion device and method for efficiently developing and utilizing hot dry rock |
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| WO2013169242A1 (en) * | 2012-05-09 | 2013-11-14 | Halliburton Energy Services, Inc. | Enhanced geothermal systems and methods |
| CN104204405A (en) * | 2012-03-29 | 2014-12-10 | 国际壳牌研究有限公司 | Electrofracturing formations |
| CN204252967U (en) * | 2014-11-28 | 2015-04-08 | 吉林大学 | Hot dry rock multi cycle heating system |
| US20150275638A1 (en) * | 2014-03-25 | 2015-10-01 | Ut-Battelle, Llc | Cavitation-based hydro-fracturing technique for geothermal reservoir stimulation |
| CN108222831A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | Multidirectional geothermal well and high-efficiency mining hot dry rock method |
| CN108331566A (en) * | 2018-03-07 | 2018-07-27 | 中国地质大学（武汉） | A kind of hot dry rock Reservoir Fracture forming method |
-
2018
- 2018-12-13 CN CN201811522532.6A patent/CN109577930A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204405A (en) * | 2012-03-29 | 2014-12-10 | 国际壳牌研究有限公司 | Electrofracturing formations |
| WO2013169242A1 (en) * | 2012-05-09 | 2013-11-14 | Halliburton Energy Services, Inc. | Enhanced geothermal systems and methods |
| US20150275638A1 (en) * | 2014-03-25 | 2015-10-01 | Ut-Battelle, Llc | Cavitation-based hydro-fracturing technique for geothermal reservoir stimulation |
| CN204252967U (en) * | 2014-11-28 | 2015-04-08 | 吉林大学 | Hot dry rock multi cycle heating system |
| CN108222831A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | Multidirectional geothermal well and high-efficiency mining hot dry rock method |
| CN108331566A (en) * | 2018-03-07 | 2018-07-27 | 中国地质大学（武汉） | A kind of hot dry rock Reservoir Fracture forming method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952928A (en) * | 2019-09-27 | 2020-04-03 | 中煤科工集团西安研究院有限公司 | Well completion device and method for efficiently developing and utilizing hot dry rock |
| CN110952928B (en) * | 2019-09-27 | 2022-02-01 | 中煤科工集团西安研究院有限公司 | Well completion device and method for efficiently developing and utilizing hot dry rock |
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Application publication date: 20190405 |