CN104131832B - A kind of high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration - Google Patents
A kind of high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration Download PDFInfo
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- CN104131832B CN104131832B CN201410334414.8A CN201410334414A CN104131832B CN 104131832 B CN104131832 B CN 104131832B CN 201410334414 A CN201410334414 A CN 201410334414A CN 104131832 B CN104131832 B CN 104131832B
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- 238000005086 pumping Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000010354 integration Effects 0.000 title abstract description 7
- 239000003245 coal Substances 0.000 claims abstract description 57
- 238000004080 punching Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000011010 flushing procedure Methods 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 9
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 238000007796 conventional method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 239000004047 hole gas Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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Abstract
A kind of high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration, a base plate layer-through drilling of first constructing in coal seam, then moves back brill, changes hydraulic flushing in hole drill rod special and drill bit in boring.In drilling rod, it is passed through the water under high pressure of 5～35MPa, rotates and move back and forth drill bit, hydraulic flushing in hole is implemented in coal seam, around boring, form the punching hole of a diameter of 0.3～1m.When moving back brill, drill bit is moved to punching coal less coal seam section, rotate in place drill bit, by high-pressure water cutting coal seam, form flat slot slot.Exit hydraulic flushing in hole drill rod special and drill bit, access special fracturing equipment, conventionally fracturing is implemented in boring；After pressure break, conventionally carry out boring sealing and mash gas extraction.The present invention has broken the limitation of single waterpower measure, by punching, slot, pressure break and extraction institutional operation, achieve coal seam release overall, uniform, single hole relief range is made to improve more than 50%, the pure flow of single hole gas improves more than 40%, single hole gas pumping rate improves more than 30%, has significant economic benefit and is widely applied prospect.
Description
Technical field
The present invention relates to a kind of high gas layer and rush the release permeability-increasing gas pumping method of cutting, press and pumping integration, be particularly well-suited to high watt
This low-air-permeability coal-bed gas extraction.
Background technology
Mine gas disaster (Gas, gas explosion, coal and gas prominent etc.) is the high-efficiency intensifying exploitation of restriction colliery
Principal element.Gas pumping is to reduce gas accident to occur, and improves gas utilization of energy and reduces at all arranging of greenhouse gas emission
Execute.In recent years, in coal seam, the anti-reflection technology of waterpowerization is with notable, the practical feature of its effect, low ventilative at China's high methane
Property coal bed gas extraction is widely used, such as hydraulic flushing technology, hydraulic turbulence and hydraulic fracturing technology etc..Engineering
Practice have shown that, use single waterpower measure to there is the biggest limitation: hydraulic flushing in hole passes through high pressure water impact, crushes and discharge
Part coal body forms certain discharge space, but for the coal seam of soft or hard skewness, punching hole often presents irregular
Shape, thus cause stress raisers；Hydraulic slotted liner technique forms flat slot by cutting coal body repeatedly, and part coal body is at slot
After deform, be caving, stress field redistributes, and coalmass crevasse is gradually grown, but, individually use hydraulic slotted liner technique operation difficulty
Degree is high, quantities is big, and particularly with weak seam, coal body creep is serious, and slot is difficult to shape, and closing of fracture is very fast, gas
Extraction is difficult to continue, efficiently carry out；Fracturing is capable of coal seam release on a large scale, but, pressure break direction is difficult to control to,
Fractured zones is the most uneven, and for hard and superhigh seam, Hydraulic fracturing pressure is higher, and operation has certain risk.To sum up, list is used
Although the waterpower measure of can realize coal seam pressure relief and permeability improvement to a certain extent, it is difficult to coal seam release overall, uniform,
Release antireflective effect is limited, and follow-up driving and stoping operation in stress raisers serious threat.
Summary of the invention
Technical problem: the problem that it is an object of the invention to exist for prior art, it is provided that a kind of simple to operate, release is uniform,
Anti-reflection significant high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration.
Technical scheme: the high gas layer of the present invention rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration, including walking as follows
Rapid:
A, from base plate to a boring of constructing in coal seam to top board, then move back brill；
B, in boring, send into hydraulic flushing in hole drill rod special and drill bit, start rig, drill rod special and drill bit are pushed in coal seam,
Then being passed through water under high pressure in drilling rod, operation drill control drill rod special moves back and forth and drives bit, and coal seam is implemented water
Power punching, forms a certain size punching hole, the coal output in real time record punching path in punch process around boring；
C, after punching reaches ceiling location implement move back brill, according to record punching coal output, often move back and be drilled into the coal that coal amount is less
During interval, rotating in place drill bit 5～15 minutes, under the effect of water under high pressure, cut coal seam, interval is formed the most flat
Flat slot slot, to increase discharge space；
D, exit hydraulic flushing in hole drill rod special and drill bit, in boring, access special fracturing equipment, according to a conventional method to boring
Implement fracturing；
E, exit special fracturing equipment, conventionally carry out boring sealing and mash gas extraction.
The pressure of described water under high pressure is 5～35MPa；Described a certain size punching hole a diameter of 0.3～1m.
Beneficial effect: achieved the preliminary release in coal seam by hydraulic flushing in hole, in hard coal section, punching aperture reduces, and occurring should
Power is concentrated, and realizes coal seam release overall, uniform by this section of coal body carries out fixed point hydraulic slotted liner technique, eliminates stress and concentrate；Meanwhile,
Expand boring release coverage, extend coal body migration space.Waterpower is implemented on the basis of hydraulic flushing in hole with hydraulic slotted liner technique
Pressure break, water under high pressure flows along punching hole and slot slot, it is achieved controlled guiding fracturing；Meanwhile, coal body is after preliminary release
Become to loosen, porous, reduce water injection pressure and improve fracturing effect.The present invention has broken the bottleneck of single waterpower measure
Problem, by punching, slot, pressure break and extraction institutional operation, it is achieved that by " line " to " face ", by " face " to " body "
Coal seam release overall, uniform, the present invention can make single hole relief range improve more than 50%, the pure flow of single hole gas improve 40%
Above, single hole gas pumping rate improves more than 30%, has significant economic benefit and is widely applied prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: 1-base plate, 2-top board, 3-coal seam, 4-holes, 5-punching hole, 6-slot slot
Detailed description of the invention
Below in conjunction with the accompanying drawings one embodiment of the present of invention is further described:
As it is shown in figure 1, the high gas layer of the present invention rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration, first the end of from
Plate 1, takes out one layer-through drilling 4 of construction in region in advance to coal seam 3, and boring 4 is through full coal section and enters top board 2 about 0.5m,
Boring 4 has been constructed to retreat and has been bored, and sends into hydraulic flushing in hole drill rod special and drill bit in boring 4, and drilling rod afterbody is connected with rig,
Starting rig, push in coal seam 3 by drill rod special and drill bit, be then passed through water under high pressure in drilling rod, operation drill control is special
Drilling rod moves back and forth and drives bit, and coal seam 3 is implemented hydraulic flushing in hole, forms a diameter of 0.3～1m around boring 4
Punching hole 5, the coal output in real time record punching path in punch process, according to boring produce coal situation regulation hydraulic pressure, go out
Coal amount properly increases hydraulic pressure time less, hydraulic pressure range of accommodation controls 5～35MPa.Implement to move back after punching reaches top board 2 position
Bore, according to the punching coal output of record, often move back when being drilled into the less coal seam section of coal amount, rotate in place drill bit 5～15 minutes,
Under the effect of water under high pressure, cutting coal seam 3, interval forms the most flat slot slot 6, to increase discharge space,
Elimination stress is concentrated.After slot terminates, exit hydraulic flushing in hole drill rod special and drill bit, in boring 4, access special fracturing
Equipment, according to a conventional method to boring 4 enforcement fracturing, after the crack initiation of coal seam 3, water injection pressure substantially reduces, and the most again rises
High water injection pressure, the most repeated multiple times, during until water injection pressure finally stably no longer changes, pressure break terminates, and stops water filling.Move back
Go out the fracturing unit in boring 4, conventionally carry out sealing and mash gas extraction to boring 4.
Claims (1)
1. a high gas layer rushes the release permeability-increasing gas pumping method that cutting, press and pumping is integrated, it is characterised in that includes implementing in coal bed drilling successively hydraulic flushing in hole, hydraulic slotted liner technique, fracturing and gas pumping, specifically comprises the following steps that
A, from base plate (1) to a boring (4) of constructing in coal seam (3), boring (4) is through full coal section and enters top board (2) about 0.5m, and boring (4) construct and retreated brill；
B, in boring (4) feeding hydraulic flushing in hole drill rod special and drill bit, drilling rod afterbody is connected with rig, start rig, drill rod special and drill bit are pushed in coal seam (3), then being passed through water under high pressure in drilling rod, operation drill control drill rod special moves back and forth and drives bit, and coal seam (3) are implemented hydraulic flushing in hole, the punching hole (5) of a diameter of 0.3 ~ 1m, the coal output in real time record punching path in punch process is formed around boring (4)；According to boring produce coal situation regulation hydraulic pressure, hydraulic pressure range of accommodation controls at 5 ~ 35MPa；
C, after punching reaches top board (2) position implement move back brill, punching coal output according to record, often move back when being drilled into the less coal seam section of coal amount, rotate in place drill bit 5 ~ 15 minutes, under the effect of water under high pressure, cutting coal seam (3), interval forms the most flat slot slot (6), to increase discharge space, eliminate stress and concentrate；
After d, slot terminate, exit hydraulic flushing in hole drill rod special and drill bit, in boring (4), access special fracturing equipment, according to a conventional method fracturing is implemented in boring (4)；
After e, coal seam (3) crack initiation, water injection pressure substantially reduces, and the most again raises water injection pressure, the most repeated multiple times, and during until water injection pressure finally stably no longer changes, pressure break terminates, and stops water filling；Exit the fracturing unit in boring (4), conventionally carry out sealing and mash gas extraction to boring (4).
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| CN201410334414.8A CN104131832B (en) | 2014-07-14 | 2014-07-14 | A kind of high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration |
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| CN201410334414.8A CN104131832B (en) | 2014-07-14 | 2014-07-14 | A kind of high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration |
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| CN104131832A CN104131832A (en) | 2014-11-05 |
| CN104131832B true CN104131832B (en) | 2016-08-17 |
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| CN104563990B (en) * | 2015-01-06 | 2018-04-20 | 中国矿业大学 | One kind bores blanking integration and heat injection cooperative reinforcing coal bed gas extraction method |
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| CN105507938B (en) * | 2015-12-31 | 2017-12-22 | 河南理工大学 | Hydraulic flushing in hole combines the construction method of anti-reflection extraction system with presplit blasting in drilling |
| CN106285768B (en) * | 2016-08-04 | 2017-10-27 | 重庆大学 | CO2Directional blasting crack initiation couples anti-reflection gas pumping method with hydraulic fracturing |
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| CN109898994A (en) * | 2019-03-21 | 2019-06-18 | 程领存 | A kind of coal seam pressure relief method and device thereof |
| CN110700798A (en) * | 2019-10-09 | 2020-01-17 | 中国矿业大学 | Efficient gas extraction method for coal seam containing gangue |
| CN111911158B (en) * | 2020-08-12 | 2022-02-25 | 华北科技学院 | Directional fracturing top-control pressure relief device for hard top plate |
| CN112267875B (en) * | 2020-10-22 | 2022-04-01 | 中国矿业大学 | Method for determining optimal coal yield of coal seam hydraulic punching |
| CN112593999B (en) * | 2020-12-24 | 2023-04-25 | 山西晋煤集团技术研究院有限责任公司 | Directional long-drilling hydraulic permeability-increasing method for soft coal seam and/or soft and hard composite coal seam |
| CN113431530A (en) * | 2021-06-29 | 2021-09-24 | 安徽理工大学 | Coal seam hydraulic slotting and combined fracturing comprehensive permeability increasing device |
| CN114320444B (en) * | 2021-12-28 | 2023-03-24 | 中国矿业大学 | Composite coal seam wind-water conversion reaming pressure-relief permeability-increasing method |
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