CN106930746A - The alternative expression coal seam anti-reflection method that drilling acetone invasion and attack are combined with hydraulic fracturing - Google Patents
The alternative expression coal seam anti-reflection method that drilling acetone invasion and attack are combined with hydraulic fracturing Download PDFInfo
- Publication number
- CN106930746A CN106930746A CN201710127893.XA CN201710127893A CN106930746A CN 106930746 A CN106930746 A CN 106930746A CN 201710127893 A CN201710127893 A CN 201710127893A CN 106930746 A CN106930746 A CN 106930746A
- Authority
- CN
- China
- Prior art keywords
- solvent
- pipe
- acetone
- hole
- invasion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000003245 coal Substances 0.000 title claims abstract description 59
- 230000009545 invasion Effects 0.000 title claims abstract description 22
- 238000001028 reflection method Methods 0.000 title claims abstract description 9
- 238000005553 drilling Methods 0.000 title description 6
- 239000002904 solvent Substances 0.000 claims abstract description 55
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000010808 liquid waste Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000003795 desorption Methods 0.000 abstract description 5
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 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
- E21B43/27—Methods for stimulating production by forming crevices or fractures by use of eroding chemicals, e.g. acids
-
- 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
- E21B43/006—Production of coal-bed methane
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention discloses the alternative expression coal seam anti-reflection method that a kind of acetone invasion and attack that drill are combined with hydraulic fracturing, belong to coal mine underground coal bed anti-reflection correlative technology field.The method carries out invasion and attack operation using acetone solvent to coal body, and under acetone effect, coal body is attacked, and produces new crack.Then media are carried out with fracturing work using hydraulic fracturing, promotes growing for coal body hole and crack, improve coal body permeability, be that desorption of mash gas flowing creates good conditions in coal body.With hydraulic fracturing be combined for acetone invasion and attack by the present invention, improves coal seam hole fissured structure, lifting coal body permeability, promotes desorption of mash gas flowing, so that for raising coal bed gas extraction efficiency creates good conditions.
Description
Technical field
The present invention relates to the alternative expression coal seam anti-reflection method that a kind of acetone invasion and attack that drill are combined with hydraulic fracturing, belong to coal
The down-hole coal bed anti-reflection correlative technology field of ore deposit, is particularly suited for soft high gassy and low permeability coal seam.
Background technology
At present, the gas pumping means of China are mainly hole pumping and mining, there is requirement higher to gas permeability of coal seam, and
With the continuous intensification of China's coal-mine mining depth, increasingly severe, the good coal of restriction of the gas permeability of coal seam to gas pumping
Layer is anti-reflection, and technology becomes the indispensable technology of colliery deep production.In order to solve this problem, existing many scholars are carried out to this
Substantial amounts of research, hydraulic fracturing is a kind of anti-reflection means in conventional coal seam, but existing hydraulic fracturing technology effect is unstable
It is fixed, under crustal stress effect, pressure break crack can quick-make, there is the phenomenons such as release is insufficient.And organic solvent is utilized to coal
Body is attacked, and can be attacked coal body, produces new crack.If first utilizing solvent attack to coal body, then carry out waterpower
Fracturing work, can improve coal seam hole fissured structure, lifting coal body permeability, promote desorption of mash gas flowing, surely reach one kind
The anti-reflection purpose in efficient coal seam.By experimental study, invasion and attack effect of the acetone solvent to coal body is obvious, and acetone is soluble in water,
While hydraulic fracturing job is carried out after attacking operation, the effect for removing acetone can be simultaneously reached, reach a water dual-purpose
Effect.The alternative expression coal seam anti-reflection method that this drilling acetone invasion and attack are combined with hydraulic fracturing surely obtains preferable effect
Really.
The content of the invention
Technical problem：The purpose of the present invention is to overcome weak point present in prior art, there is provided a kind of method is simple,
The alternative expression coal seam anti-reflection method that the drilling acetone invasion and attack of coal seam antireflective effect are combined with hydraulic fracturing can be greatly improved.
Technical scheme：The anti-reflection side in alternative expression coal seam that a kind of acetone invasion and attack that drill of the invention are combined with hydraulic fracturing
Method, is included in one pressure break hole of construction in coal seam and is located at two extraction holes of pressure break hole both sides, it is characterised in that also including with
Lower step：
Solvent pipe is sent into a, the pressure break hole after the completion of construction, until the front end of solvent pipe reaches the top in pressure break hole；
B, the exposed junction connection threeway in solvent pipe, one end connection solvent pump of threeway, solvent pump connection solvent tank, solvent
Pump front end is installed by solvent valve；The threeway other end connects high-pressure rubber pipe, and high-pressure rubber pipe is sequentially connected high-pressure hydraulic pump and water tank, high pressure
Water pump valve is installed in water pump front end, and pressure gauge is installed in water pump valve front end；
C, in the extraction hole of pressure break hole both sides releasing pipe is respectively fed to, until the front end of releasing pipe reaches extraction hole top
Portion, the exposed junction of releasing pipe is connected with liquid waste treatment system；
After d, pipeline arrangement are completed, sealing of hole is carried out to extraction hole and pressure break hole with hole packer；
After the completion of e, sealing of hole operation, solvent valve is opened, make acetone solvent in solvent tank by solvent pump, threeway and molten
Agent pipe carries out invasion and attack operation in being injected into coal seam；
After the completion of f, invasion and attack operation, close solvent valve, open water pump valve, make water in water tank by high-pressure hydraulic pump,
High-pressure rubber pipe, threeway and solvent pipe implement hydraulic fracturing to coal seam, meanwhile, acetone solvent forms dilute acetone soln after being dissolved in water,
Liquid waste treatment system is delivered to through releasing pipe；
G, when pressure gauge display pressure substantially rise when, switched off the pump valve, and releasing pipe is connected with fire damp pipe network,
Carry out gas pumping.
The exposed junction of the solvent pipe is at the 0.1-0.15m positions of aperture.
The exposed junction of the releasing pipe is at the 0.1-0.15m positions of aperture.
Beneficial effect：By adopting the above-described technical solution, with hydraulic fracturing be combined for acetone invasion and attack by the present invention, can
Greatly improve coal seam antireflective effect.Under acetone effect, coal body is attacked, and new crack is produced, then using hydraulic fracturing
Media are carried out with fracturing work, promotes growing for coal body hole and crack, improve coal body permeability, be gas solution in coal body
Inhale flowing to create good conditions, improve coal seam hole fissured structure, improve coal body permeability, promote desorption of mash gas stream
It is dynamic, so that created good conditions to improve coal bed gas extraction efficiency, in the art with wide applicability.
Brief description of the drawings
Fig. 1 is the alternative expression coal seam anti-reflection method schematic diagram that drilling acetone invasion and attack of the invention are combined with hydraulic fracturing.
In figure：1- coal seams, 2- extractions hole, 3- pressure breaks hole, 4- solvent pipes, 5- threeways, 6- solvent pumps, 7- solvent tanks, 8- is molten
Agent valve, 9- high-pressure rubber pipes, 10- water pump valves, 11- high-pressure hydraulic pumps, 12- water tanks, 13- releasing pipes, 14- hole packers, 15- pressure
Table.
Specific embodiment
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings：
The alternative expression coal seam anti-reflection method that drilling acetone invasion and attack of the invention are combined with hydraulic fracturing, step is as follows：
A, constructing first in coal seam 1 a pressure break hole 3 and is located at two extraction holes 2 of the both sides of pressure break hole 3, is then applying
Feeding solvent pipe 4 in the pressure break hole 3 that work is completed, until the front end of solvent pipe 4 reaches the top in pressure break hole 3；The solvent pipe 4
Exposed junction is at the 0.1-0.15m positions of aperture；
B, the exposed junction connection threeway 5 in solvent pipe 4, one end connection solvent pump 6 of threeway, the connection solvent tank of solvent pump 6
7, solvent valve 8 is installed in the front end of solvent pump 6；The other end of threeway 5 connects high-pressure rubber pipe 9, and high-pressure rubber pipe 9 is sequentially connected high-pressure hydraulic pump
11 and water tank 12, water pump valve 10 is installed in the front end of high-pressure hydraulic pump 11, and pressure gauge 15 is installed in the front end of water pump valve 10；
C, the both sides of pressure break hole 3 extraction hole 2 in be respectively fed to releasing pipe 13, until releasing pipe 13 front end reach extraction
The top of hole 2, the exposed junction of releasing pipe 13 is connected with liquid waste treatment system；The exposed junction of the releasing pipe 13 is apart from aperture
At 0.1m positions；
After d, pipeline arrangement are completed, sealing of hole is carried out to extraction hole 2 and pressure break hole 3 with hole packer 14；Closure on the outside of hole
Distance of the end face away from aperture is 1-1.5m；
After the completion of e, sealing of hole operation, solvent valve 8 is opened, make the acetone solvent in solvent tank 7 by solvent pump 6, threeway 5
Being injected into coal seam with solvent pipe 4 carries out invasion and attack operation, and under acetone effect, coal body is attacked, and produces new crack；
After the completion of f, invasion and attack operation, solvent valve 8 is closed, open water pump valve 10, make the water in water tank 12 by high pressure
Water pump 11, high-pressure rubber pipe 9, threeway 5 and solvent pipe 4 implement hydraulic fracturing to coal seam 1, promote the growth hair in coal body hole and crack
Educate, improve coal body permeability, be that desorption of mash gas flowing creates good conditions in coal body, meanwhile, acetone solvent is formed after being dissolved in water
Dilute acetone soln, liquid waste treatment system is delivered to through releasing pipe 13；
G, when the display pressure of pressure gauge 15 substantially rises, switch off the pump valve 10, by releasing pipe 13 and fire damp pipe
Net connection, carries out gas pumping.
Claims (3)
1. the alternative expression coal seam anti-reflection method that a kind of acetone invasion and attack that drill are combined with hydraulic fracturing, is included in coal seam（1）In apply
One pressure break hole of work（3）Be located at pressure break hole（3）Two extraction holes of both sides（2）, it is characterised in that it is further comprising the steps of：
A, the pressure break hole after the completion of construction（3）Interior feeding solvent pipe（4）, until solvent pipe（4）Front end reach pressure break hole（3）
Top；
B, in solvent pipe（4）Exposed junction connection threeway（5）, one end connection solvent pump of threeway（6）, solvent pump（6）Connection is molten
Agent case（7）, solvent pump（6）Front end is installed by solvent valve（8）；Threeway（5）The other end connects high-pressure rubber pipe（9）, high-pressure rubber pipe
（9）It is sequentially connected high-pressure hydraulic pump（11）And water tank（12）, high-pressure hydraulic pump（11）Front end is installed by water pump valve（10）, water pump valve
（10）Front end is installed by pressure gauge（15）；
C, in pressure break hole（3）The extraction hole of both sides（2）Inside it is respectively fed to releasing pipe（13）, until releasing pipe（13）Front end reach
Extraction hole（2）Top, by releasing pipe（13）Exposed junction be connected with liquid waste treatment system；
After d, pipeline arrangement are completed, hole packer is used（14）To extraction hole（2）With pressure break hole（3）Carry out sealing of hole；
After the completion of e, sealing of hole operation, solvent valve is opened（8）, make solvent tank（7）In acetone solvent by solvent pump（6）, three
It is logical（5）And solvent pipe（4）Being injected into coal seam carries out invasion and attack operation；
After the completion of f, invasion and attack operation, solvent valve is closed（8）, open water pump valve（10）, make water tank（12）In water through too high
Water pump（11）, high-pressure rubber pipe（9）, threeway（5）And solvent pipe（4）To coal seam（1）Implement hydraulic fracturing, meanwhile, acetone solvent
Dilute acetone soln is formed after being dissolved in water, through releasing pipe（13）It is delivered to liquid waste treatment system；
G, when pressure gauge display pressure substantially rise when, switch off the pump valve（10）, by releasing pipe（13）With fire damp pipe network
Connection, carries out gas pumping.
2. the anti-reflection side in alternative expression coal seam that a kind of acetone invasion and attack that drill according to claim 1 are combined with hydraulic fracturing
Method, it is characterised in that：The solvent pipe（4）Exposed junction at the 0.1-0.15m positions of aperture.
3. the anti-reflection side in alternative expression coal seam that a kind of acetone invasion and attack that drill according to claim 1 are combined with hydraulic fracturing
Method, it is characterised in that：The releasing pipe（13）Exposed junction at the 0.1-0.15m positions of aperture.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710127893.XA CN106930746B (en) | 2017-03-06 | 2017-03-06 | Drilling acetone invades the alternative expression coal seam anti-reflection method combined with hydraulic fracturing |
| PCT/CN2017/089969 WO2018161470A1 (en) | 2017-03-06 | 2017-06-26 | Method sequentially employing acetone erosion and hydraulic fracturing techniques in borehole to increase permeability of coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710127893.XA CN106930746B (en) | 2017-03-06 | 2017-03-06 | Drilling acetone invades the alternative expression coal seam anti-reflection method combined with hydraulic fracturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106930746A true CN106930746A (en) | 2017-07-07 |
| CN106930746B CN106930746B (en) | 2019-06-04 |
Family
ID=59424598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710127893.XA Active CN106930746B (en) | 2017-03-06 | 2017-03-06 | Drilling acetone invades the alternative expression coal seam anti-reflection method combined with hydraulic fracturing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106930746B (en) |
| WO (1) | WO2018161470A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387082A (en) * | 2017-07-31 | 2017-11-24 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method for weakening coal seam tight roof |
| CN108266222A (en) * | 2018-01-10 | 2018-07-10 | 中国矿业大学 | A kind of solvent extraction, moistening reversion, pulsation pressure break Trinity coal body anti-reflection method |
| CN108708694A (en) * | 2018-05-28 | 2018-10-26 | 四川省煤炭产业集团有限责任公司 | The high-pressure gas-liquid microvesicle anti-reflection method of low air permeability coal seam |
| CN111828082A (en) * | 2020-07-21 | 2020-10-27 | 中国矿业大学 | Coal bed permeability increasing method with cooperation of chemical extraction and liquid explosive |
| CN115492563A (en) * | 2022-09-27 | 2022-12-20 | 中煤科工集团重庆研究院有限公司 | Multi-drill-hole through type fracturing, punching, permeation increasing and pressure relieving device and method for soft coal seam |
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| US20070151729A1 (en) * | 2006-01-04 | 2007-07-05 | Halliburton Energy Services, Inc. | Methods of stimulating liquid-sensitive subterranean formations |
| WO2011081665A1 (en) * | 2009-12-28 | 2011-07-07 | Enis Ben M | Sequestering co2 and releasing natural gas from coal and gas shale formations |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387082A (en) * | 2017-07-31 | 2017-11-24 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method for weakening coal seam tight roof |
| CN108266222A (en) * | 2018-01-10 | 2018-07-10 | 中国矿业大学 | A kind of solvent extraction, moistening reversion, pulsation pressure break Trinity coal body anti-reflection method |
| CN108708694A (en) * | 2018-05-28 | 2018-10-26 | 四川省煤炭产业集团有限责任公司 | The high-pressure gas-liquid microvesicle anti-reflection method of low air permeability coal seam |
| CN108708694B (en) * | 2018-05-28 | 2021-02-02 | 四川省煤炭产业集团有限责任公司 | High-pressure gas-liquid microbubble permeability increasing method for low-permeability coal seam |
| CN111828082A (en) * | 2020-07-21 | 2020-10-27 | 中国矿业大学 | Coal bed permeability increasing method with cooperation of chemical extraction and liquid explosive |
| CN111828082B (en) * | 2020-07-21 | 2021-09-07 | 中国矿业大学 | Coal bed permeability increasing method with cooperation of chemical extraction and liquid explosive |
| CN115492563A (en) * | 2022-09-27 | 2022-12-20 | 中煤科工集团重庆研究院有限公司 | Multi-drill-hole through type fracturing, punching, permeation increasing and pressure relieving device and method for soft coal seam |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018161470A1 (en) | 2018-09-13 |
| CN106930746B (en) | 2019-06-04 |
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