CN108194125A - A kind of coal seam cooperates with anti-reflection method step by step - Google Patents
A kind of coal seam cooperates with anti-reflection method step by step Download PDFInfo
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- CN108194125A CN108194125A CN201711362143.7A CN201711362143A CN108194125A CN 108194125 A CN108194125 A CN 108194125A CN 201711362143 A CN201711362143 A CN 201711362143A CN 108194125 A CN108194125 A CN 108194125A
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- coal seam
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- extraction
- drilling
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- 239000003245 coal Substances 0.000 title claims abstract description 73
- 238000001028 reflection method Methods 0.000 title claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000005553 drilling Methods 0.000 claims abstract description 63
- 238000000605 extraction Methods 0.000 claims abstract description 62
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 33
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 26
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 26
- 238000004880 explosion Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 17
- 239000002775 capsule Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000010257 thawing Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 21
- 239000007924 injection Substances 0.000 abstract description 21
- 230000003667 anti-reflective effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of coal seams to cooperate with anti-reflection method step by step, and extraction is first drilled out in coal seam and is drilled, and the coal seam for making extraction drilling surrounding with carbon dioxide explosion forms uniformly initial cracked district, then alternately injects water and liquid nitrogen in extraction drilling.After drainage holes fill water, draining reinjects liquid nitrogen, and the water in initial cracked district, which meets liquid nitrogen setting expansion, makes crack continue to expand along existing fracture strike.Alternately and repeatedly water filling and liquid nitrogen make crack constantly move towards to expand along both fissare, it is more preferable that uniformly widened crack, antireflective effect are formed in coal seam.Coal seam collaboration in anti-reflection method, has formed initial cracked district, low pressure water injection can make water seepage flow avoid the hidden danger that high pressure water injection is brought into cracked district in drilling due to extraction step by step.Rupture coal body during the water setting expansion of initial cracked district, initial crack made to expand step by step along existing crack, in coal seam the expansion in crack have more controllability.
Description
Technical field
The present invention relates to coal seam anti-reflection method fields more particularly to a kind of coal seam to cooperate with anti-reflection method step by step.
Background technology
Gas is that the gas of initiation Coal Mine Disasters is also a kind of clean energy resource, and extraction is carried out to the gas of underground coal mine, can
It reduces coal mine gas disaster and obtains this clean energy resource.The most gas permeability of coal seam of coal mine in China is low, and gas is caused to take out
It is low to adopt concentration, gas pumping scale is few.It is anti-reflection to coal seam implementation, it is to solve the problems, such as these major measure.The coal used at present
The anti-reflection technology of layer mainly has that standing, hydraulic flushing in hole, water jet slot, high-pressure hydraulic pressure break, high energy gas explosion is anti-reflection etc.
Method, these anti-reflection methods have the defects of certain applicable elements are with itself.Standing is anti-reflection, and explosive used in technology is easy
Generation is miss-fired phenomenon, and the explosive to miss-fire is not disposable, leaves security risk；Hydraulic flushing technology easily induces in punch process
Coal and gas prominent causes safety accident；Into seam, effect is undesirable or nothing for the softer coal seam of hardness for water jet slotting technique
For method into seam, antireflective effect is poor；Technology that high energy gas explosion is anti-reflection generates the bulbs of pressure to coal fracturing using the phase transformation of gas
It is anti-reflection, but phase transformation explosion energy is smaller, and anti-reflection region is small；The uncontrollability that hydraulic fracturing technology is flowed due to high pressure water, makes
Into the uncontrollability and inhomogeneities of fracture zone.
Invention content
In view of above-mentioned deficiencies of the prior art, the present invention provides a kind of coal seams to cooperate with anti-reflection method step by step.It assists in the coal seam
Extraction drilling is first drilled out in scheduled coal seam with anti-reflection method step by step, then is formed uniformly with carbon dioxide explosion in extraction drilling
Initial cracked district, then alternately toward injecting water and liquid nitrogen in extraction drilling.When injecting water, water is full of in initial cracked district,
The water in extraction drilling is discharged, interior water still retains in the crack of initial cracked district, and then injection liquid nitrogen makes into extraction drilling
Water-setting in initial cracked district is consolidated.Water-setting in initial cracked district expands when solid, and crack is made to continue to expand along existing fracture strike
Greatly.Discharge liquid nitrogen and low temperature nitrogen, the ice-out in crack.Repeat water filling, draining, injection liquid nitrogen, discharge liquid nitrogen and cryogenic nitrogen
Gas, makes crack constantly constantly expand along existing fracture strike, and big uniform crack is formed in coal seam.The coal seam cooperates with step by step
In anti-reflection method, initial crack first is generated with carbon dioxide explosion, then alternately injection extraction borehole gradually expands with water and liquid nitrogen
Crack.Due to having formed initial cracked district, low pressure water injection can make water seepage flow into cracked district, avoid high pressure water injection bring it is hidden
Suffer from.Coal body is ruptured during the water setting expansion of initial cracked district, initial crack is made to expand along existing crack, it is uniform to realize crack
Controllable expansion, antireflective effect are more preferable.
Technical scheme is as follows：
A kind of coal seam cooperates with anti-reflection method step by step, including step：
S1：Extraction drilling is drilled out in scheduled coal seam；
S2：The coal seam of extraction drilling inner periphery is formed in the interior implementation carbon dioxide explosion of extraction drilling uniformly initially to split
Gap circle；
S3：Filling water into extraction drilling makes water be full of initial cracked district；
S4：The water in extraction drilling is discharged, the water in initial cracked district is remained in initial cracked district；
S5：The water stayed in initial cracked district will be made to be frozen into ice in liquid nitrogen injection extraction drilling；
S6：The trend that expansion makes coal seam along initial crack when water-setting in initial cracked district is solid continues rupture and is split so as to expand
Crack in gap circle；
S7：The liquid nitrogen and low temperature nitrogen in extraction drilling are discharged, the heat that the ice in cracked district absorbs coal seam slowly melts；
S8：Step S3 to S7 is repeated in, makes the uniform expansion of crack step by step in cracked district.
Preferably, step S1 is specifically included：
S11：Concordant extraction drilling or cross drainage drilling holes are drilled out in predetermined coal seam；
S12：Exit drilling rod；
S13：Clear up the clast in concordant extraction drilling or cross drainage drilling holes.
Preferably, step S2 is specifically included：
S21：Measure the length of the coal seam section in extraction drilling；
S22：Carbon dioxide explosion bar is connected, the total length of carbon dioxide explosion bar is more than the coal seam section in extraction drilling
Length；
S23：Carbon dioxide explosion bar is sent to the coal seam section in extraction drilling and implements explosion；
S24：It exits carbon dioxide explosion bar and extraction is closed by high pressure resistant rubber hole packer and drill.
Preferably, high pressure resistant rubber hole packer is capsule hole.
Preferably, in step S3, the hydraulic pressure of water filling is higher than the pressure 0.5-1.5MPa of the gas in coal seam.
Preferably, in step S3, the hydraulic pressure of water filling is higher than the pressure 1MPa of gas in coal seam.
Compared with prior art, beneficial effects of the present invention：
A kind of coal seam provided by the invention cooperates with anti-reflection method step by step, passes through carbon dioxide explosion and is formed in extraction drills
Uniform initial cracked district, then alternately injecting water and liquid nitrogen in extraction drilling makes the crack in initial cracked district be split along existing
Gap trend expands step by step, realizes crack and uniformly expands, antireflective effect is more preferable；By carbon dioxide explosion in extraction drilling
Form uniform initial cracked district so that low pressure water injection can make water seepage flow into cracked district, avoid high pressure water injection bring it is hidden
Suffer from；Expand cracks in coal seam step by step on the basis of initial cracked district so that the expansion in crack has more controllability.
Description of the drawings
Fig. 1 is the structure diagram of the carbon dioxide blaster device described in the embodiment of the present invention 1；
Fig. 2 is the structure diagram of the water injection device and liquid injection nitrogen device described in the embodiment of the present invention 1；
Specific embodiment：
The present invention is described further with reference to the accompanying drawings.
Embodiment 1
As depicted in figs. 1 and 2, one cross drainage drilling holes is drilled out using conventional method across the mantlerock 3 in Di Chou lanes, taken out
The rock stratum 1 for drilling and penetrating on the entire arrival of coal seam 2 coal seam 2 is put, the aperture 94mm of extraction drilling, it is dry that drilling construction finishes cleaning
Remnant clasts in net drilling.According to extraction drill in coal seam section length, connection carbon dioxide blaster device 6 connected
The length of carbon dioxide blaster device 6 is greater than the length of the coal seam section in extraction drilling.By 6 steel splitting pipes, 1.5m/ roots,
Composition connecting tube 5 is connected with each other to send carbon dioxide demolition set 6 to the coal seam section in extraction drilling, and in the hole of extraction drilling
Mouth seals extraction drilling using single hole capsule hole 4, and the interface of connecting rod 5 is reserved on capsule hole 4.Implement explosion
Afterwards, the impact that the phase transformation of carbon dioxide high energy gas generates makes the coal seam 2 around extraction drilling is broken to form uniform cracked district.
After implementing carbon dioxide explosion, capsule hole 4, connecting rod 5, carbon dioxide blaster device 6 are removed, to extraction
Fluid injection nitrogen pipe 12, water injection pipe 11, exhaust water pipe 17 are inserted into drilling, using porous capsule hole packer 16 in the outlet that extraction drills
Place seals drilling, and 12 interface of note liquid nitrogen pipe, 11 interface of water injection pipe, exhaust 17 interface of water pipe are reserved on capsule hole 16.It closes
Close exhaust aqueduct valve 15, fluid injection nitrogen tube valve 13, open water filling tube valve 14, open water injecting pump 10, by extraction drill to
Water filling in coal seam 2, the pressure of water higher than pressure 1MPa of gas in coal seam 2 or so, when 2 water filling saturation of coal seam namely with
When the variation water injection rate of time and not changing or change very little, stop water filling.Close water filling tube valve 14 and water injecting pump 10, fluid injection
Nitrogen pipe 13 remains turned-off, and opens exhaust aqueduct valve 15, closes exhaust aqueduct valve 15 after discharging the water in extraction drilling, opens
Liquid nitrogen pipe 13 is noted, opens note liquid nitrogen pump 9, injects liquid nitrogen into extraction drilling.With the seepage flow of low temperature liquid nitrogen, coal seam 2 is initially split
Water flash freeze in gap circle, during water freezing expansion crack is forced to continue to expand along both fissare trends.Discharge liquid nitrogen and low
After warm nitrogen, ice in cracks in coal seam absorbs the heat in coal seam and melts, repeat later above-mentioned water filling, draining, injection liquid nitrogen,
Liquid nitrogen and low temperature nitrogen step are discharged, the crack in coal seam 2 is made uniformly to extend step by step.
A kind of coal seam provided by the invention cooperates with anti-reflection method step by step, passes through carbon dioxide explosion and is formed in extraction drills
Uniform initial cracked district, then alternately injecting water and liquid nitrogen in extraction drilling makes the crack in initial cracked district be split along existing
Gap trend expands step by step, realizes crack and uniformly expands, antireflective effect is more preferable；By carbon dioxide explosion in extraction drilling
Form uniform initial cracked district so that low pressure water injection can make water seepage flow into cracked district, avoid high pressure water injection bring it is hidden
Suffer from；Expand cracks in coal seam step by step on the basis of uniform initial cracked district so that the expansion in crack has more controllability in coal seam.
It should be understood that the application of the present invention is not limited to the above, it, can for the normal technician of this field
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect range.
Claims (6)
1. a kind of coal seam cooperates with anti-reflection method step by step, which is characterized in that including step：
S1：Extraction drilling is drilled out in scheduled coal seam；
S2：The coal seam of the extraction drilling inner periphery is made to be formed uniformly by implementing carbon dioxide explosion in drilling in the extraction
Initial cracked district；
S3：Water is made to be full of the initial cracked district by filling water into extraction drilling；
S4：The cross drainage drilling holes are vacated by discharging the water in the extraction drilling, the water in the initial cracked district
It stays in the initial cracked district；
S5：The water stayed in the initial cracked district is made to be frozen into ice by the way that liquid nitrogen is injected in the extraction drilling；
S6：The crack expanded in the initial cracked district by expansion of the water-setting in initial cracked district when solid forms new
Cracked district；
S7：The extraction drilling is vacated by discharging liquid nitrogen in extraction drilling and low temperature nitrogen, the new crack
Ice in circle absorbs heat and the thawing in coal seam；
S8：Crack in the new cracked district is expanded step by step by being repeated in the step S3 to S7.
2. a kind of coal seam according to claim 1 cooperates with anti-reflection method step by step, which is characterized in that the step S1：Pre-
Fixed coal seam drills out extraction drilling and specifically includes：
S11：Concordant extraction drilling or cross drainage drilling holes are drilled out in predetermined coal seam；
S12：Exit drilling rod；
S13：Clear up the clast in the concordant extraction drilling or cross drainage drilling holes.
3. a kind of coal seam according to claim 1 cooperates with anti-reflection method step by step, which is characterized in that the step S2：Pass through
Implementation carbon dioxide explosion makes the coal seam of the extraction drilling inner periphery form initial cracked district specific in the extraction drills
Including：
S21：Measure the length of the coal seam section in the extraction drilling；
S22：Carbon dioxide explosion bar is connected, the total length of the carbon dioxide explosion bar is more than the coal seam in extraction drilling
The length of section；
S23：The carbon dioxide explosion bar is sent to the coal seam section in extraction drilling and implements explosion；
S24：It exits the carbon dioxide explosion bar and the extraction is closed by high pressure resistant rubber hole packer and drill.
4. a kind of coal seam according to claim 3 cooperates with anti-reflection method step by step, which is characterized in that the step S24：It exits
The carbon dioxide explosion bar is simultaneously closed by high pressure resistant rubber hole packer in the extraction drilling, the high pressure resistant rubber sealing of hole
Device is capsule hole.
5. a kind of coal seam according to claim 1 cooperates with anti-reflection method step by step, which is characterized in that the step S3：Pass through
Filling water into extraction drilling makes water be full of in the initial cracked district, and the hydraulic pressure of the water filling is higher than the gas in coal seam
0.5~1.5MPa of pressure.
6. a kind of coal seam according to claim 5 cooperates with anti-reflection method step by step, which is characterized in that the step S3：Pass through
Filling water into extraction drilling makes water be full of in the initial cracked district, and the hydraulic pressure of the water filling is higher than gas pressure in coal seam
Power 1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711362143.7A CN108194125A (en) | 2017-12-18 | 2017-12-18 | A kind of coal seam cooperates with anti-reflection method step by step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711362143.7A CN108194125A (en) | 2017-12-18 | 2017-12-18 | A kind of coal seam cooperates with anti-reflection method step by step |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108194125A true CN108194125A (en) | 2018-06-22 |
Family
ID=62576870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711362143.7A Pending CN108194125A (en) | 2017-12-18 | 2017-12-18 | A kind of coal seam cooperates with anti-reflection method step by step |
Country Status (1)
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| CN (1) | CN108194125A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322622A (en) * | 2018-09-28 | 2019-02-12 | 三峡大学 | A kind of swollen expanding method of the ice of Rock And Soil |
| CN110617047A (en) * | 2019-10-21 | 2019-12-27 | 中煤科工集团重庆研究院有限公司 | Coal seam gas extraction method based on directional drilling and liquid nitrogen quick freezing thermal cracking |
| CN112211625A (en) * | 2020-10-09 | 2021-01-12 | 中国矿业大学 | Thermal and chemical fluid modified reservoir simulation device and method |
| CN113006858A (en) * | 2021-04-20 | 2021-06-22 | 中国矿业大学 | Intelligent detection equipment and method for coal seam occurrence distribution in regional gas control process |
| CN114165209A (en) * | 2021-11-30 | 2022-03-11 | 中国矿业大学 | Method for constructing complex seam net of coal seam step by step |
| CN114575818A (en) * | 2022-03-31 | 2022-06-03 | 中国石油大学(北京) | Fracturing method based on gas-liquid driving pulse |
| CN114837731A (en) * | 2022-05-25 | 2022-08-02 | 中国矿业大学 | High-temperature flue gas pressure injection and pulse gas cooperative construction coal seam complex seam network system and method |
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| CN106988719A (en) * | 2017-05-09 | 2017-07-28 | 河南理工大学 | The anti-reflection system and anti-reflection method of injection hot water and liquid nitrogen are circulated to coal seam |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322622A (en) * | 2018-09-28 | 2019-02-12 | 三峡大学 | A kind of swollen expanding method of the ice of Rock And Soil |
| CN110617047A (en) * | 2019-10-21 | 2019-12-27 | 中煤科工集团重庆研究院有限公司 | Coal seam gas extraction method based on directional drilling and liquid nitrogen quick freezing thermal cracking |
| CN112211625A (en) * | 2020-10-09 | 2021-01-12 | 中国矿业大学 | Thermal and chemical fluid modified reservoir simulation device and method |
| CN113006858A (en) * | 2021-04-20 | 2021-06-22 | 中国矿业大学 | Intelligent detection equipment and method for coal seam occurrence distribution in regional gas control process |
| CN113006858B (en) * | 2021-04-20 | 2022-06-17 | 中国矿业大学 | Intelligent detection device and method for coal seam occurrence distribution in regional gas control process |
| CN114165209A (en) * | 2021-11-30 | 2022-03-11 | 中国矿业大学 | Method for constructing complex seam net of coal seam step by step |
| CN114165209B (en) * | 2021-11-30 | 2023-09-15 | 中国矿业大学 | Method for constructing complex seam network of coal seam step by step |
| CN114575818A (en) * | 2022-03-31 | 2022-06-03 | 中国石油大学(北京) | Fracturing method based on gas-liquid driving pulse |
| CN114837731A (en) * | 2022-05-25 | 2022-08-02 | 中国矿业大学 | High-temperature flue gas pressure injection and pulse gas cooperative construction coal seam complex seam network system and method |
| CN114837731B (en) * | 2022-05-25 | 2023-02-24 | 中国矿业大学 | High-temperature flue gas pressure injection and pulse gas cooperative construction coal seam complex seam network system and method |
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Application publication date: 20180622 |