CN108331566B - A kind of hot dry rock Reservoir Fracture forming method - Google Patents
A kind of hot dry rock Reservoir Fracture forming method Download PDFInfo
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- CN108331566B CN108331566B CN201810185454.9A CN201810185454A CN108331566B CN 108331566 B CN108331566 B CN 108331566B CN 201810185454 A CN201810185454 A CN 201810185454A CN 108331566 B CN108331566 B CN 108331566B
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- well
- net horizontal
- horizontal section
- injection well
- hot dry
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- 239000011435 rock Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000005474 detonation Methods 0.000 claims abstract description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 17
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 239000003999 initiator Substances 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 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
-
- 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
- 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
- E21B43/255—Methods for stimulating production including the injection of a gaseous medium as treatment fluid into the formation
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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)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The present invention provides a kind of hot dry rock Reservoir Fracture forming method, comprising: S1 determines injection well position and in Drilling injection well in hot dry rock, and injection well includes vertical well section and n net horizontal section, wherein n >=1；S2 surrounds n producing well of injection well Drilling, and producing well includes vertical well section and corresponds and be respectively arranged at immediately below n net horizontal section of injection well with net horizontal section, the net horizontal section of a producing well of n and n net horizontal section of injection well；S3 constructs several detonation vestibules straight down, and several detonation vestibules in the net horizontal section of each producing well construction straight up in the net horizontal section of injection well；S4 transfers demolition set in n net horizontal section of injection well and the net horizontal section of n producing well, and ignition demolition set, which releases carbon dioxide gas expansion generation pressure, to be made to generate crack in hot dry rock.The advantages of beneficial effects of the present invention: having rock breaking capacity strong, and seam is uniform, and burst pressure is controllable, and device is simple, environmental protection and economy.
Description
Technical field
The present invention relates to geothermal energy development technical field more particularly to a kind of hot dry rock Reservoir Fracture forming methods.
Background technique
Hot dry rock is part most potential in geothermal energy as clean renewable energy, and restricting dry-hot-rock geothermal can open
The bottleneck of hair is manually to build the Fracture Networks effectively passed through for heat-conducting medium on a large scale.Currently used heat reservori builds hand
Section is hydraulic fracturing technology, and disadvantage is prominent: broken rock surge pressure is insufficient, and water body leak-off is serious, and big to reservoir damage, reservoir is all
Multiple location cannot be excited effectively, and heat storage is adopted heat and is restricted.There is an urgent need to new effective broken rock development tools.Carbon dioxide
Explosion is anti-reflection in coal seam, has comparable application in shallow-layer rock mining, with the obvious advantage: rock breaking capacity is strong, and seam is uniform, burst pressure
Power is controllable, and device is simple, environmental protection and economy.In order to create the effective heat transfer space of sufficiently large reservoir, by carbon dioxide explosive applications
Building in hot dry rock Fracture Networks is a kind of feasible trial.
Summary of the invention
In view of this, the embodiment provides a kind of hot dry rock Reservoir Fracture forming methods.
The embodiment of the present invention provides a kind of hot dry rock Reservoir Fracture forming method, comprising:
S1 determines injection well position and in Drilling injection well in hot dry rock rock mass, and the injection well includes vertical well section and n
A net horizontal section, the vertical well section are connected to the n net horizontal sections respectively, wherein n >=1；
S2 surround described n producing well of injection well Drilling, each producing well include vertical well section and with the Vertical Well
Mono- net horizontal section of Duan Liantong, the net horizontal section of the n producing wells correspond and divide with n net horizontal section of the injection well
It is not set to immediately below n net horizontal section of the injection well；
S3 constructs several detonation vestibules straight down in the net horizontal section of the injection well, and in each producing well
Net horizontal section construction several detonation vestibules straight up；
S4 transfers demolition set in the net horizontal section of n net horizontal section and the n producing well of the injection well, institute
Stating demolition set includes carbon dioxide fracturing device and electromagnetism initiator, starts all electromagnetism initiators, ignites all carbon dioxide
Fracturing device releases carbon dioxide gas, and gas expansion generates pressure and acts on hot dry rock rock mass, makes to generate in hot dry rock rock mass
Crack.
Further, intracavitary using the crack formed in hydraulic fracturing extension S4 in all detonation holes, and in all levels
Well section transfers floral tube.
Further, the gap between each floral tube and hot dry rock rock mass is filled with sandstone.
Further, all detonation vestibules are constructed using pulse perforating technology.
Further, n net horizontal section of the injection well is divided into n-layer along vertical direction.
Further, the n producing wells are uniformly distributed around the injection well.
Further, the adjacent detonation cavity spacing on each net horizontal section is equal.
Further, two net horizontal sections of the injection well arbitrary neighborhood in the projection angle on horizontal plane be 360 °/n,
Wherein n >=2.
The technical solution that the embodiment of the present invention provides has the benefit that a kind of hot dry rock Reservoir Fracture of the present invention
Forming method solves hot dry rock reservoir and builds hand in the quick-fried artificial Fracture Networks of formation of hot dry rock rock mass inner utilization carbon dioxide
The effective pressure break reservoir of Duan Wufa, big to reservoir damage, technical costs is high, the technical problem of fluid heat transfer low efficiency, has broken rock
The advantages of ability is strong, and seam is uniform, and burst pressure is controllable, and device is simple, environmental protection and economy has to pushing hot dry rock commercialization to exploit
There is important technological progress meaning.
Detailed description of the invention
Fig. 1 is a kind of flow chart of hot dry rock Reservoir Fracture forming method of the present invention；
Fig. 2 is the arrangement schematic diagram of injection well and producing well；
Fig. 3 is hot dry rock Reservoir Fracture network formation process schematic diagram.
In figure: 1- injection well, 2- producing well, 3- vertical well section, 4- net horizontal section, 5- detonation vestibule.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
Referring to FIG. 1, the embodiment provides a kind of hot dry rock Reservoir Fracture forming methods, comprising:
S1 determines injection well position and in Drilling injection well in hot dry rock rock mass, and the injection well includes vertical well section and n
A net horizontal section, the vertical well section are connected to the n net horizontal sections respectively, wherein n >=1；
S2 surround described n producing well of injection well Drilling, each producing well include vertical well section and with the Vertical Well
Mono- net horizontal section of Duan Liantong, the net horizontal section of the n producing wells correspond and divide with n net horizontal section of the injection well
It is not set to immediately below n net horizontal section of the injection well；
S3 constructs several detonation vestibules straight down in the net horizontal section of the injection well, and in each producing well
Net horizontal section construction several detonation vestibules straight up；
S4 transfers demolition set in the net horizontal section of n net horizontal section and the n producing well of the injection well, institute
Stating demolition set includes carbon dioxide fracturing device and electromagnetism initiator, starts all electromagnetism initiators, ignites all carbon dioxide
The carbon dioxide gas that fracturing device releases, gas expansion generate pressure and act on hot dry rock rock mass, make to produce in hot dry rock rock mass
Raw crack.
It illustrates below and the above method is illustrated,
Referring to figure 2. and Fig. 3, determine that dry-hot-rock geothermal can develop work area and carry out well group arrangement in the underground heat target area of delineation,
As needed, plan arranges an injection well 1 in center, arranges that five producing wells 2, five producing wells 2 are arranged as around injection well
Regular pentagon, construction procedure are as follows:
(1) in underground heat target area hot dry rock rock mass center Drilling injection well 1, the injection well 1 includes 3 He of vertical well section
Five net horizontal sections 4, the vertical well section 3 are connected to five net horizontal sections 4 respectively, five net horizontal sections, 4 edge of the injection well 1
Vertical direction be divided into five layers, two net horizontal sections 4 of 1 arbitrary neighborhood of injection well are equal in the projection angle on horizontal plane,
It is 72 °；
(2) with the injection well 1 for five producing well 2 of center Drilling, five producing wells 2 are arranged in regular pentagon, each
Distance L is determined according to underground heat target area area between the producing well 2 and the injection well 1, and the producing well 2 includes the vertical of connection
Well section 3 and net horizontal section 4, the net horizontal section of five producing wells 2 and five net horizontal sections of the injection well 1 correspond, and five
The net horizontal section 4 of the producing well 2 is respectively arranged at immediately below five net horizontal section 4 of the injection well 1；
(3) pulse perforating technology, several blast holes of the construction of net horizontal section 4 of Yu Suoshu injection well 1 straight down are used
Chamber 5, and in the net horizontal section 4 of each producing well 2 construction several detonation vestibules 5 straight up, the injection well 1 it is each
The detonation vestibule 5 of net horizontal section 4 and the detonation vestibule 5 of the net horizontal section 4 of each producing well 2 are oppositely arranged；
(4) five net horizontal sections 4 of Yu Suoshu injection well 1 and the net horizontal section 4 of five producing wells 2 transfer explosion dress
It sets, the demolition set includes carbon dioxide fracturing device and electromagnetism initiator, the carbon dioxide fracturing device explosion design flow root
It is determined according to each 4 volume of net horizontal section, starts all electromagnetism initiators, ignite all carbon dioxide fracturing devices release two
Carbon oxide gas, gas expansion generate pressure and act on hot dry rock rock mass, make to generate crack in hot dry rock rock mass；
(5) carbon dioxide bursting work effect is monitored, step (4) can be repeated several times until crack meets in detonation vestibule 5
Until design requirement；
(6) in all detonation vestibules 5 use hydraulic fracturing extension the intracorporal crack of hot dry rock rock form artificial fracture network
Network penetrates through the net horizontal section 4 of each producing well 2 and the net horizontal section 4 of the injection well 1 right above it, reaches fluid
The good result that medium sufficiently exchanges heat, and floral tube is transferred in all net horizontal sections 4, between each floral tube and hot dry rock rock mass
Gap is filled with sandstone, forms sandstone filter screen.
Cold fluid is injected in 1 well head of injection well, cold fluid flows into 1 net horizontal section 4 of injection well, by hot dry rock
Artificial Fracture Networks reach each 2 net horizontal section 4 of producing well, are then discharged by each 2 well head of producing well, wherein cold fluid
Heat is carried out with hot dry rock rock mass to exchange, and is obtained enough heats and is taken ground to and the commercial exploitations such as is generated electricity or warmed oneself.
Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of hot dry rock Reservoir Fracture forming method characterized by comprising
S1 determines injection well position and in Drilling injection well in hot dry rock rock mass, and the injection well includes vertical well section and n water
Horizontal well section, the vertical well section are connected to the n net horizontal sections respectively, wherein n >=1；
S2 surrounds described n producing well of injection well Drilling, and each producing well includes vertical well section and connects with the vertical well section
A logical net horizontal section, the net horizontal section of the n producing wells are corresponded with n net horizontal section of the injection well and are set respectively
It is placed in immediately below n net horizontal section of the injection well；
S3 constructs several detonation vestibules straight down in the net horizontal section of the injection well, and in the water of each producing well
Several detonation vestibules of horizontal well section construction straight up；
S4 transfers demolition set in the net horizontal section of n net horizontal section and the n producing well of the injection well, described quick-fried
Breaking device includes carbon dioxide fracturing device and electromagnetism initiator, starts all electromagnetism initiators, ignites all carbon dioxide fracturings
Device releases carbon dioxide gas, and gas expansion generates pressure and acts on hot dry rock rock mass, makes to generate crack in hot dry rock rock mass.
2. a kind of hot dry rock Reservoir Fracture forming method as described in claim 1, which is characterized in that the method also includes:
S5 is intracavitary using the crack formed in hydraulic fracturing extension S4 in all detonation holes, and lets off fireworks under all net horizontal sections
Pipe.
3. a kind of hot dry rock Reservoir Fracture forming method as claimed in claim 2, it is characterised in that: each floral tube with it is xeothermic
Gap between rock rock mass is filled with sandstone.
4. a kind of hot dry rock Reservoir Fracture forming method as described in claim 1, it is characterised in that: all detonation vestibules use
Pulse perforating technology construction.
5. a kind of hot dry rock Reservoir Fracture forming method as described in claim 1, it is characterised in that: n of the injection well
Net horizontal section is divided into n-layer along vertical direction.
6. a kind of hot dry rock Reservoir Fracture forming method as described in claim 1, it is characterised in that: the n producing wells enclose
It is uniformly distributed around the injection well.
7. a kind of hot dry rock Reservoir Fracture forming method as described in claim 1, it is characterised in that: on each net horizontal section
Adjacent detonation vestibule spacing it is equal.
8. a kind of hot dry rock Reservoir Fracture forming method as described in claim 1, it is characterised in that: any phase of injection well
Two adjacent net horizontal sections are 360 °/n in the projection angle on horizontal plane, wherein n >=2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810185454.9A CN108331566B (en) | 2018-03-07 | 2018-03-07 | A kind of hot dry rock Reservoir Fracture forming method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810185454.9A CN108331566B (en) | 2018-03-07 | 2018-03-07 | A kind of hot dry rock Reservoir Fracture forming method |
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| CN108331566A CN108331566A (en) | 2018-07-27 |
| CN108331566B true CN108331566B (en) | 2019-06-25 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109577930A (en) * | 2018-12-13 | 2019-04-05 | 苏州峰极电磁科技有限公司 | Two-way geothermal well and hoistway fracturing crack method for communicating |
| CN110541696A (en) * | 2019-07-15 | 2019-12-06 | 河南理工大学 | carbon dioxide blasting-hydraulic fracturing reconstruction yield increasing method for oil and gas well |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437497A (en) * | 2016-09-23 | 2017-02-22 | 太原理工大学 | Method for constructing hot dry rock artificial geothermal reservoir through water pressure blasting fracturing |
| CN106481328A (en) * | 2016-09-23 | 2017-03-08 | 太原理工大学 | A kind of utilization graininess dry ice builds the hot dry rock method that manually heat is stored up |
| CN107100605A (en) * | 2017-04-21 | 2017-08-29 | 中国石油大学(北京) | A kind of method that dual horizontal well circulation supercritical carbon dioxide develops hot dry rock |
| CN107288606A (en) * | 2017-08-07 | 2017-10-24 | 吉林大学 | A kind of method of artificial construction hot dry rock heat reservori |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2005258224A1 (en) * | 2004-06-23 | 2006-01-05 | Terrawatt Holdings Corporation | Method of developingand producing deep geothermal reservoirs |
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- 2018-03-07 CN CN201810185454.9A patent/CN108331566B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437497A (en) * | 2016-09-23 | 2017-02-22 | 太原理工大学 | Method for constructing hot dry rock artificial geothermal reservoir through water pressure blasting fracturing |
| CN106481328A (en) * | 2016-09-23 | 2017-03-08 | 太原理工大学 | A kind of utilization graininess dry ice builds the hot dry rock method that manually heat is stored up |
| CN107100605A (en) * | 2017-04-21 | 2017-08-29 | 中国石油大学(北京) | A kind of method that dual horizontal well circulation supercritical carbon dioxide develops hot dry rock |
| CN107288606A (en) * | 2017-08-07 | 2017-10-24 | 吉林大学 | A kind of method of artificial construction hot dry rock heat reservori |
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Application publication date: 20180727 Assignee: JIANGSU HEXIN PETROLEUM MACHINERY Co.,Ltd. Assignor: CHINA University OF GEOSCIENCES (WUHAN CITY) Contract record no.: X2022420000014 Denomination of invention: A method for forming fractures in dry hot rock reservoir Granted publication date: 20190625 License type: Exclusive License Record date: 20220225 |
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