CN105114116B - A kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method - Google Patents
A kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method Download PDFInfo
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- CN105114116B CN105114116B CN201510458809.3A CN201510458809A CN105114116B CN 105114116 B CN105114116 B CN 105114116B CN 201510458809 A CN201510458809 A CN 201510458809A CN 105114116 B CN105114116 B CN 105114116B
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- 230000008878 coupling Effects 0.000 title claims abstract description 25
- 238000010168 coupling process Methods 0.000 title claims abstract description 25
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 25
- 238000001027 hydrothermal synthesis Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005086 pumping Methods 0.000 title claims abstract description 19
- 238000005728 strengthening Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003245 coal Substances 0.000 claims abstract description 21
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 15
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 15
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 15
- 239000011575 calcium Substances 0.000 claims abstract description 15
- 239000004571 lime Substances 0.000 claims abstract description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 230000004044 response Effects 0.000 claims abstract description 4
- 235000013312 flour Nutrition 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 238000007796 conventional method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 3
- 239000010959 steel Substances 0.000 claims 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims 1
- 239000002956 ash Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 9
- 238000003795 desorption Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method disclosed by the invention, constructed successively on the lane side of coal seam first main pressure break hole, branch's pressure break hole and bullport, main pressure break hole is arranged in an equilateral triangle center position, the position of opening in branch's pressure break hole is arranged in three apexes of the equilateral triangle, its borehole bottom location is met at the equilateral triangle center line, bullport is in using main pressure break hole as the center of circle, and radius is on 5~15m circle；Fracturing unit includes the water injection equipment being made up of intelligent water tank, fracturing pump and note powder device forms.The calcium lime powder noted in powder device is injected in main pressure break hole and branch's pressure break hole by underground blast；Hydraulic fracturing is carried out to main pressure break hole by water injection equipment, calcium lime powder enters crack under the carrying of water under high pressure, while the substantial amounts of heat of thermal response generation occurs for calcium lime powder and moisture, realizes hydrothermal reaction coupling pressure break；By implementing hydrothermal reaction coupling pressure break strengthening region gas pumping method, the increase of pressure break influence area, the increase of mash gas extraction concentration, significant effect, the requirements of one's work such as colliery scene regional gas control are met.
Description
Technical field
The present invention relates to a kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method, belongs to underground coal mine region gas and controls
Technical field is managed, is particularly suitable for use in the hydrothermal reaction coupling fracturing work of the projecting coal bed middle regional gas control of deep high methane.
Background technology
Chinese Academy of Engineering《National energy development strategy 2030~2050》Report proposes that the year two thousand fifty coal annual production control exists
3000000000 tons, coal is using for a long time as the leading energy in China.But China Mine Geological complicated condition, high gas layer account for
50%-70%, and high gassy and low permeability coal seam accounts for therein 70% or so.China's high gassy and low permeability coal seam preservation is special
Sign is micropore property, low-permeability and high adsorption, causes to be usually associated with a large amount of Gas in recovery process, particularly
With the high-efficiency intensifying of coal production and the increase of mining depth, gas emission is increasing, and gas explosion and gas are dashed forward
The threat for going out danger is increasingly severe.Therefore, colliery often needs to carry out regional gas control operation, waterpower pressure in recovery process
The technology of splitting is one of major measure of oil output, and certain effect is also achieved in the application of underground coal mine.
However, existing coal seam hydraulic fracture technology is present, technique effect is unstable, release is insufficient, extraction efficiency is low etc.
Phenomenon, it is not only time-consuming, workload is big, and it is dangerous it is high, cost is high.Traditional hydraulic fracturing technology is primarily due to split
Gap extension is insufficient, is not carried out the Fracture Networks in region.Moreover, the presence of moisture is sealed after the implementation of conventional hydraulic fracturing technique
Blocked up the passage of Gas Flow, produced and suppress desorption of mash gas, diffusion and the effect of infiltration, cause hydraulic fracturing technology gradually by
Limitation.Therefore, in order to solve existing hydraulic fracturing technology defect, it is badly in need of a kind of new fracturing technique method, to meet colliery
The requirements of one's work such as field regions gas preventing and control.With reference to and draw the advantage of existing hydraulic fracturing, use for reference heating and promote gas solution
The thinking of suction, increase pressure break after gas desorption quantity, the plugging action for reducing moisture after pressure break, produced using rational drilling arrangement
Region Fracture Networks, form hydrothermal reaction coupling pressure break and strengthen gas pumping technical method.
The content of the invention
Technical problem：The purpose of the present invention is to be directed in high gassy and low permeability coal seam in existing hydraulic fracturing technology not
Foot part, there is provided a kind of pressure break influence area is big, and desorption of mash gas amount is big, and gas pumping effect is obvious, success rate is high, cost is low
Hydrothermal reaction coupling pressure break strengthening region gas pumping method.
Technical scheme：
Hydrothermal reaction coupling pressure break strengthening region gas pumping method of the present invention, it is characterised in that comprise the following steps：
A. construct main pressure break hole successively in coal seam lane side and three branch's pressure break holes, main pressure break hole are arranged in one equilateral three
Angular center position, the position of opening in three branch's pressure break holes are arranged in three apexes of the equilateral triangle, and three
The borehole bottom location in individual branch's pressure break hole is met at the equilateral triangle center line, is formed using the equilateral triangle bottom of as, to divide
Branch pressure break hole is the positive triangular pyramid of seamed edge, main pressure break hole, three branch's pressure break holes is penetrated in coal seam, and main pressure break hole is with dividing
The spacing in branch pressure break hole is 2~3m；
B. in 5~15m opening positions, four bullports of construction apart from main pressure break hole, four bullports are made to be in main pressure break
Hole is the center of circle, and radius is on 5~15m circle；
C. fracturing unit is connected in main pressure break hole aperture, the fracturing unit includes being made up of intelligent water tank, fracturing pump
Water injection equipment and note powder device composition.The outlet pipe of water injection equipment and the flour extraction pipe of note powder device are linked together by threeway, threeway
Outlet be connected through high-pressure rubber pipe with pressure break pipe, the outlet pipe of water injection equipment, note be respectively equipped with the flour extraction pipe of powder device it is unidirectional
Valve；
D. borehole sealing is carried out to main pressure break hole, branch's pressure break hole and bullport using conventional method for sealing successively；
E. a certain amount of calcium lime powder is added into note powder device, is injected the calcium lime powder noted in powder device by underground blast
In main pressure break hole, when all branch's pressure break holes all go out powder, stop note powder；
F. fracturing pump is opened, hydraulic fracturing is carried out to main pressure break hole by water injection equipment, in main pressure break hole and branch's pressure break
Crack is produced around hole, calcium lime powder enters crack under the carrying of water under high pressure, while thermal response occurs for calcium lime powder and moisture
The substantial amounts of heat of generation, realizes hydrothermal reaction coupling pressure break；
G. repeat step e, f, when water outflow all occur in four bullports, stop hydrothermal reaction coupling pressure break, remove pressure break
Equipment, main pressure break hole, branch's pressure break hole and bullport are connected to gas drainage pipe network, carry out gas pumping.
Beneficial effect：By adopting the above-described technical solution, solving existing hydraulic fracturing technology defect, coal seam is realized
Hydrothermal reaction coupling pressure break, promote the development of coal body internal crack, extension and insertion, the increase of pressure break influence area；Temperature rise promotes
Desorption of mash gas, the increase pressure break after gas desorption quantity of high adsorption；Moisture reacts with calcium lime powder, and moisture reduces, and reduces
The plugging action of moisture after pressure break.By implementing hydrothermal reaction coupling pressure break strengthening region gas pumping method, mash gas extraction concentration increases
Greatly, cost is low, significant effect, meets the requirements of one's work such as colliery scene regional gas control.
Brief description of the drawings
Fig. 1 is the hydrothermal reaction coupling pressure break strengthening region gas pumping method borehole pattern of the present invention.
Fig. 2 is the hydrothermal reaction coupling pressure break strengthening region gas pumping method embodiment schematic diagram of the present invention.
In figure：1-lane side, 2-main pressure break hole, 3-branch pressure break hole, 4-bullport, 5-intelligent water tank, 6-pressure break
Pump, 7-high-pressure rubber pipe, 8-1-check valve, 8-2-check valve, 9-valve, 10-threeway, 11-pressure break pipe, 12-note powder
Device, 13-calcium lime powder, 14-crack.
Embodiment：
The specific embodiment of the invention is further described below in conjunction with the accompanying drawings：
Shown in Fig. 1 and Fig. 2, a kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method：First, on coal seam lane side 1
To construct successively main pressure break hole 2 and three branch's pressure break holes 3, main pressure break hole 2 is arranged in an equilateral triangle center position, and three
The position of opening in individual branch's pressure break hole 3 is arranged in three apexes of the equilateral triangle, the end in three branch's pressure break holes 3
Hole site is met at the equilateral triangle center line, is formed using the equilateral triangle bottom of as, is seamed edge with branch's pressure break hole 3
Positive triangular pyramid, main 2, three branch's pressure break holes 3 in pressure break hole are made to be penetrated in coal seam, main pressure break hole 2 is opened with branch's pressure break hole 3
Pitch of holes is 2~3m；In 5~15m opening positions, four bullports 4 of construction apart from main pressure break hole 2, it is in four bullports 4
It is the center of circle with main pressure break hole 2, radius is on 5~15m circle；Fracturing unit, the fracturing unit are connected in the main aperture of pressure break hole 2
Formed including the water injection equipment being made up of intelligent water tank 5, fracturing pump 6 and note powder device 12.The outlet pipe and note powder device of water injection equipment
Flour extraction pipe linked together by threeway 10, the outlet of threeway 10 is connected through high-pressure rubber pipe 7 with pressure break pipe 11, water injection equipment
Outlet pipe, note powder device 12 flour extraction pipe on be respectively equipped with check valve 8-1 and check valve 8-2；Using routine method for sealing according to
It is secondary that borehole sealing is carried out to main pressure break hole 2, branch's pressure break hole 3 and bullport 4；A certain amount of quick lime is added into note powder device 12
Powder 13, the calcium lime powder 13 noted in powder device 12 is injected in main pressure break hole 2 by underground blast, treats that all branch's pressure break holes 3 are complete
When portion goes out powder, stop note powder；Fracturing pump 6 is opened, hydraulic fracturing is carried out to main pressure break hole 2 by water injection equipment, in main pressure break hole 2
Crack 14 is produced with the surrounding of branch's pressure break hole 3, calcium lime powder 13 enters crack 14, while calcium lime powder under the carrying of water under high pressure
13 and moisture the substantial amounts of heat of thermal response generation occurs, realize hydrothermal reaction coupling pressure break, temperature raises the gas for promoting high adsorption
Desorption, increase pressure break after gas desorption quantity；Moisture reacts with calcium lime powder, and moisture reduces, and reduces the envelope of moisture after pressure break
Stifled effect；When four bullports 4 all water outflow occur, stop hydrothermal reaction coupling pressure break, fracturing unit is removed, by main pressure break hole
2nd, branch's pressure break hole 3 and bullport 4 are connected to gas drainage pipe network, carry out gas pumping.Strengthened by implementing hydrothermal reaction coupling pressure break
Region gas pumping method, solve existing hydraulic fracturing technology defect, realize coal seam hydrothermal reaction coupling pressure break, promote in coal body
Portion's cranny development, extension and insertion, the increase of mash gas extraction concentration, cost is low, significant effect, meets colliery scene region gas
The requirements of one's work such as improvement.
Claims (2)
1. a kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method, it is characterised in that comprise the following steps：
A. constructed successively main pressure break hole (2) and three branch's pressure break holes (3) in coal seam lane side (1), main pressure break hole (2) is arranged in one
Individual equilateral triangle center position, the position of opening of three branch's pressure break holes (3) are arranged in the three of the equilateral triangle
Individual apex, the borehole bottom location of three branch's pressure break holes (3) are met at the equilateral triangle center line, make main pressure break hole (2),
Three branch's pressure break holes (3) penetrate in coal seam, and main pressure break hole (2) and the spacing in branch's pressure break hole (3) are 2~3m；
B. apart from the main 5~15m opening positions of pressure break hole (2) four bullports (4) of construction, four bullports (4) are made to be in master
Pressure break hole (2) is the center of circle, and radius is on 5~15m circle；
C. fracturing unit is connected in main pressure break hole (2) aperture, the fracturing unit is made up of intelligent water tank (5), fracturing pump (6)
Water injection equipment and note powder device (12) composition, the outlet pipe of water injection equipment and the flour extraction pipe of note powder device are connected to one by threeway (10)
Rise, the outlet of threeway (10) is connected through high-pressure rubber pipe (7) with pressure break pipe (11), outlet pipe, the note powder device (12) of water injection equipment
Flour extraction pipe on be respectively equipped with check valve one (8-1) and check valve two (8-2)；
D. using conventional method for sealing successively main pressure break hole (2), branch's pressure break hole (3) and bullport (4) drill it is close
Envelope；
E. a certain amount of calcium lime powder (13) is added into note powder device (12), the life stone in powder device (12) will be noted by underground blast
Ashes (13) is injected in main pressure break hole (2), when all branch's pressure break holes (3) all go out powder, stops note powder；
F. fracturing pump (6) is opened, hydraulic fracturing is carried out to main pressure break hole (2) by water injection equipment, in main pressure break hole (2) and branch
Crack (14) are produced around pressure break hole (3), calcium lime powder (13) enters crack (14) under the carrying of water under high pressure, while quick lime
The substantial amounts of heat of thermal response generation occurs for powder (13) and moisture, realizes hydrothermal reaction coupling pressure break；
G. repeat step e, f, when four bullports (4) all water outflow occur, stop hydrothermal reaction coupling pressure break, remove pressure break and set
It is standby, main pressure break hole (2), branch's pressure break hole (3) and bullport (4) are connected to gas drainage pipe network, carry out gas pumping.
2. hydrothermal reaction coupling pressure break strengthening region gas pumping method according to claim 1, it is characterised in that：Pressure break pipe
(11) it is total for the seamless steel pipe of even tube wall arrangement aperture, hole diameter 10mm, a diameter of 25mm of seamless steel pipe, seamless steel pipe
Length is 30m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510458809.3A CN105114116B (en) | 2015-07-30 | 2015-07-30 | A kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510458809.3A CN105114116B (en) | 2015-07-30 | 2015-07-30 | A kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method |
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| Publication Number | Publication Date |
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| CN105114116A CN105114116A (en) | 2015-12-02 |
| CN105114116B true CN105114116B (en) | 2018-01-05 |
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| CN201510458809.3A Expired - Fee Related CN105114116B (en) | 2015-07-30 | 2015-07-30 | A kind of hydrothermal reaction coupling pressure break strengthening region gas pumping method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105525901B (en) * | 2015-12-29 | 2017-10-24 | 中国矿业大学 | A kind of coal seam hydraulic fracture reinforcing anti-reflection method based on microwave irradiation |
| CN105484720B (en) * | 2015-12-29 | 2017-10-24 | 中国矿业大学 | The coal seam anti-reflection method that a kind of On Microwave-assisted Extraction is mutually cooperateed with hydraulic fracturing |
| CN105673067B (en) * | 2016-03-07 | 2018-02-13 | 中国矿业大学 | A kind of hydraulic fracturing and the device and method of the combined reinforced draining coal seam gas of microwave radiation |
| CN107842350B (en) * | 2017-11-07 | 2019-08-02 | 河南理工大学 | A kind of method that extraction rate is improved in the high gas remainder quantity coal seam of underground coal mine |
| CN107975359B (en) * | 2017-11-23 | 2019-12-03 | 山东科技大学 | A kind of anti-disaster method of coal-bed flooding based on seawater corrosion |
| CN108708765B (en) * | 2018-04-13 | 2019-09-06 | 山东科技大学 | One kind strengthening acid fracturing coal uncovering method based on high temperature disturbance |
| CN108643878B (en) * | 2018-04-13 | 2020-03-10 | 山东科技大学 | High-temperature disturbance strengthened acidizing and fracturing area gas extraction method |
| CN110067548B (en) * | 2019-06-10 | 2023-05-16 | 河南理工大学 | Coal mine underground high-temperature hydraulic fracturing permeability-increasing method and system |
| CN113738435B (en) * | 2021-09-10 | 2023-05-19 | 湘潭大学 | Enhanced anti-reflection extraction method for deep low-permeability high-gas coal seam area |
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2015
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| CN101191415A (en) * | 2006-11-27 | 2008-06-04 | 杨仁树 | Method for crushing rock formation of coal mine |
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