CN106930746B - Alternate Coal Seam Permeability Enhancement Method Combined with Drilling Acetone Invasion and Hydraulic Fracturing - Google Patents
Alternate Coal Seam Permeability Enhancement Method Combined with Drilling Acetone Invasion and Hydraulic Fracturing Download PDFInfo
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- CN106930746B CN106930746B CN201710127893.XA CN201710127893A CN106930746B CN 106930746 B CN106930746 B CN 106930746B CN 201710127893 A CN201710127893 A CN 201710127893A CN 106930746 B CN106930746 B CN 106930746B
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- 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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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Extraction Or Liquid Replacement (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of drilling acetone to invade the alternative expression coal seam anti-reflection method combined with hydraulic fracturing, belongs to coal mine underground coal bed anti-reflection correlative technology field.This method carries out invasion operation to coal body using acetone solvent, and under acetone effect, coal body is invaded, and new crack is generated.Then fracturing work is carried out to media using hydraulic fracturing, promotes the growth and development of coal body hole and crack, improve coal body permeability, created good conditions for desorption of mash gas flowing in coal body.Acetone is invaded and is combined with hydraulic fracturing by the present invention, is improved coal seam hole fissured structure, is promoted coal body permeability, promotes desorption of mash gas flowing, to create good conditions to improve coal bed gas extraction efficiency.
Description
Technical field
The present invention relates to a kind of drilling acetone to invade the alternative expression coal seam anti-reflection method combined with hydraulic fracturing, belongs to coal
The down-hole coal bed anti-reflection correlative technology field of mine, is particularly suitable for soft high gassy and low permeability coal seam.
Background technique
Currently, the gas drainage means in China are mainly hole pumping and mining, there is higher requirement to gas permeability of coal seam, and
With the continuous intensification of China's coal-mine mining depth, gas permeability of coal seam is increasingly severe to the restriction of gas drainage, good coal
Layer is anti-reflection, and technology becomes the indispensable technology of coal mine deep production.In order to solve this problem, have many scholars to this progress
A large amount of research, hydraulic fracturing is a kind of anti-reflection means in common coal seam, but existing hydraulic fracturing technology effect is unstable
It is fixed, under crustal stress effect, pressure break crack can quick-make, it is insufficient there are release phenomena such as.And utilize organic solvent to coal
Body is invaded, and coal body can be made to be invaded, and generates new crack.If first utilizing solvent attack to coal body, then carry out waterpower
Fracturing work can improve coal seam hole fissured structure, promote coal body permeability, promote desorption of mash gas flowing, surely reach a kind of
The anti-reflection purpose in efficient coal seam.By experimental study, acetone solvent acts on obviously the invasion of coal body, and acetone is soluble easily in water,
While carrying out hydraulic fracturing job after invading operation, it can achieve the effect that remove acetone simultaneously, it is dual-purpose to reach a water
Effect.The alternative expression coal seam anti-reflection method that this drilling acetone invasion are combined with hydraulic fracturing surely obtains ideal effect
Fruit.
Summary of the invention
Technical problem: the purpose of the present invention is overcoming shortcoming present in prior art, provide a kind of method it is simple,
The drilling acetone that coal seam antireflective effect can be greatly improved invades the alternative expression coal seam anti-reflection method combined with hydraulic fracturing.
Technical solution: a kind of drilling acetone of the invention invades the anti-reflection side in alternative expression coal seam combined with hydraulic fracturing
Method pressure break hole and is located at two extraction holes of pressure break hole two sides including constructing in coal seam, which is characterized in that further include with
Lower step:
A, it is sent into solvent pipe in pressure break hole after the completion of construction, until the front end of solvent pipe reaches the top in pressure break hole；
B, threeway is connected in the exposed junction of solvent pipe, one end of threeway connects solvent pump, and solvent pump connects solvent tank, solvent
It pumps front end and solvent valve is installed；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, it is respectively fed to releasing pipe in the extraction hole of pressure break hole two sides, until the front end of releasing pipe reaches extraction hole top
The exposed junction of releasing pipe is connected by portion with liquid waste treatment system；
D, after pipeline arrangement is completed, sealing of hole is carried out to extraction hole and pressure break hole with hole packer；
E, after the completion of sealing of hole operation, solvent valve is opened, makes acetone solvent in solvent tank by solvent pump, threeway and molten
Agent pipe, which is injected into coal seam, carries out invasion operation；
F, invade after the completion of 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 shows that pressure obviously rises, switch off the pump valve, and releasing pipe is connect with fire damp pipe network,
Carry out gas drainage.
The exposed junction of the solvent pipe is at the position 0.1-0.15m of aperture.
The exposed junction of the releasing pipe is at the position 0.1-0.15m of aperture.
The utility model has the advantages that by adopting the above-described technical solution, the present invention invades acetone combines with hydraulic fracturing, it can
Greatly improve coal seam antireflective effect.Under acetone effect, coal body is invaded, and generates new crack, then utilizes hydraulic fracturing
Fracturing work is carried out to media, promotes the growth and development of coal body hole and crack, improves coal body permeability, is gas solution in coal body
It inhales flowing to create good conditions, improves coal seam hole fissured structure, improve coal body permeability, promote desorption of mash gas stream
It is dynamic, to create good conditions to improve coal bed gas extraction efficiency, there is wide applicability in the art.
Detailed description of the invention
Fig. 1 is that drilling acetone of the invention invades the alternative expression coal seam anti-reflection method schematic diagram combined with hydraulic fracturing.
In figure: the coal seam 1-, 2- extraction hole, 3- pressure break hole, 4- solvent pipe, 5- threeway, 6- solvent pump, 7- solvent tank, 8- are molten
Agent valve, 9- high-pressure rubber pipe, 10- water pump valve, 11- high-pressure hydraulic pump, 12- water tank, 13- releasing pipe, 14- hole packer, 15- pressure
Table.
Specific embodiment
One embodiment of the present of invention is further described with reference to the accompanying drawing:
Drilling acetone of the invention invades the alternative expression coal seam anti-reflection method combined with hydraulic fracturing, and steps are as follows:
A, it constructs first in coal seam 1 and a pressure break hole 3 and is located at two extraction holes 2 of 3 two sides of pressure break hole, then applying
Solvent pipe 4 is sent into 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 position 0.1-0.15m of aperture；
B, threeway 5 is connected in the exposed junction of solvent pipe 4, one end of threeway connects solvent pump 6, and solvent pump 6 connects solvent tank
7, solvent valve 8 is installed in 6 front end of solvent pump；5 other end of threeway 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 11 front end of high-pressure hydraulic pump, and pressure gauge 15 is installed in 10 front end of water pump valve；
C, it is respectively fed to releasing pipe 13 in the extraction hole 2 of 3 two sides of pressure break hole, until the front end of releasing pipe 13 reaches extraction
2 top of hole, 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 the position 0.1m；
D, after pipeline arrangement is 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 far from aperture is 1-1.5m；
E, after the completion of sealing of hole operation, solvent valve 8 is opened, makes the acetone solvent in solvent tank 7 by solvent pump 6, threeway 5
It is injected into coal seam with solvent pipe 4 and carries out invasion operation, under acetone effect, coal body is invaded, and new crack is generated；
F, it invades after the completion of operation, closes solvent valve 8, 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 in coal body hole and crack hair
It educates, improves coal body permeability, create good conditions for desorption of mash gas flowing in coal body, meanwhile, acetone solvent is formed after being dissolved in water
Dilute acetone soln is delivered to liquid waste treatment system through releasing pipe 13；
G, when pressure gauge 15 shows that pressure obviously rises, switch off the pump valve 10, by releasing pipe 13 and fire damp pipe
Net connection, carries out gas drainage.
Claims (3)
1. a kind of drilling acetone invades the alternative expression coal seam anti-reflection method combined with hydraulic fracturing, it is included in coal seam (1) and applies
One pressure break hole (3) of work and two extraction holes (2) for being located at pressure break hole (3) two sides, which is characterized in that further comprising the steps of:
A, solvent pipe (4) are sent into the pressure break hole (3) after the completion of construction, until the front end of solvent pipe (4) reaches pressure break hole (3)
Top；
B, threeway (5) are connected in the exposed junction of solvent pipe (4), one end of threeway connects solvent pump (6), and solvent pump (6) connection is molten
Solvent valve (8) are installed in agent case (7), solvent pump (6) front end；Threeway (5) 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), water pump valve (10) are installed in high-pressure hydraulic pump (11) front end, water pump valve (10)
Front end is installed by pressure gauge (15)；
C, releasing pipe (13) are respectively fed in the extraction hole (2) of pressure break hole (3) two sides, until the front end of releasing pipe (13) reaches
At the top of extraction hole (2), the exposed junction of releasing pipe (13) is connected with liquid waste treatment system；
D, after pipeline arrangement is completed, sealing of hole is carried out to extraction hole (2) and pressure break hole (3) with hole packer (14)；
E, it after the completion of sealing of hole operation, opens solvent valve (8), makes the acetone solvent in solvent tank (7) by solvent pump (6), three
Logical (5) and solvent pipe (4) are injected into coal seam and carry out invasion operation；
F, it invades after the completion of operation, closes solvent valve (8), open water pump valve (10), make the water in water tank (12) through excessively high
Water pump (11), high-pressure rubber pipe (9), threeway (5) and solvent pipe (4) implement hydraulic fracturing to coal seam (1), meanwhile, acetone solvent
Dilute acetone soln is formed after being dissolved in water, is delivered to liquid waste treatment system through releasing pipe (13)；Under acetone effect, coal body is invaded
It attacks, generates new crack, fracturing work then is carried out to coal body using hydraulic fracturing, promote the growth in coal body hole and crack hair
It educates, improves coal body permeability, create good conditions for desorption of mash gas flowing in coal body, improve coal seam hole fissured structure, mention
It risen coal body permeability, promoted desorption of mash gas flowing；
G, when pressure gauge shows that pressure obviously rises, the valve that switches off the pump (10), by releasing pipe (13) and fire damp pipe network
Connection carries out gas drainage.
2. a kind of drilling acetone according to claim 1 invades the anti-reflection side in alternative expression coal seam combined with hydraulic fracturing
Method, it is characterised in that: the exposed junction of the solvent pipe (4) is at the position 0.1-0.15m of pressure break hole aperture.
3. a kind of drilling acetone according to claim 1 invades the anti-reflection side in alternative expression coal seam combined with hydraulic fracturing
Method, it is characterised in that: the exposed junction of the releasing pipe (13) is at the position 0.1-0.15m of extraction hole aperture.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710127893.XA CN106930746B (en) | 2017-03-06 | 2017-03-06 | Alternate Coal Seam Permeability Enhancement Method Combined with Drilling Acetone Invasion and 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 | Alternate Coal Seam Permeability Enhancement Method Combined with Drilling Acetone Invasion and Hydraulic Fracturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106930746A CN106930746A (en) | 2017-07-07 |
| CN106930746B true 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 | Alternate Coal Seam Permeability Enhancement Method Combined with Drilling Acetone Invasion and Hydraulic Fracturing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106930746B (en) |
| WO (1) | WO2018161470A1 (en) |
Families Citing this family (10)
| 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 |
| 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 |
| CN109765137B (en) * | 2019-01-16 | 2024-10-22 | 西安科技大学 | Experimental device for detecting coal sample hot-cold impact fracturing effect |
| CN111828082B (en) * | 2020-07-21 | 2021-09-07 | 中国矿业大学 | A Coal Seam Permeability Enhancement Method Combined with Chemical Extraction and Liquid Explosives |
| CN114382480B (en) * | 2022-01-18 | 2025-07-15 | 辽宁工程技术大学 | Pressure relief method and application of coal pillar left in upper goaf based on controllable shock wave |
| CN115492563A (en) * | 2022-09-27 | 2022-12-20 | 中煤科工集团重庆研究院有限公司 | A soft coal seam multi-drilled through-hole fracturing device and method for increasing permeability and releasing pressure |
| CN115898328A (en) * | 2022-11-17 | 2023-04-04 | 河南理工大学 | Intelligent recoverable hole sealing construction process for ground slurry making and underground slurry storage |
| CN118774821B (en) * | 2024-07-10 | 2025-09-26 | 中国矿业大学 | Combined storage and improvement method of sand-carrying oxidant pulse injection and static fracturing in hard coal seams |
| CN119102739B (en) * | 2024-10-17 | 2025-09-19 | 重庆大学 | Dual-pulsation acid fracturing permeability-increasing low-permeability coal seam reinforced gas extraction system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070151729A1 (en) * | 2006-01-04 | 2007-07-05 | Halliburton Energy Services, Inc. | Methods of stimulating liquid-sensitive subterranean formations |
| CN202023547U (en) * | 2011-04-29 | 2011-11-02 | 中国矿业大学 | Coal mine underground pulsed hydraulic fracturing equipment |
| CN103541710A (en) * | 2013-10-16 | 2014-01-29 | 中国矿业大学 | Method for forcedly draining gas from underground gas and liquid alternate phase-drive fracture coal of coal mine |
| CN104632270A (en) * | 2015-01-06 | 2015-05-20 | 中国矿业大学 | Oscillating impulse type high-energy gas fracturing and heat injection alternating gas-extracting method |
| CN105484720A (en) * | 2015-12-29 | 2016-04-13 | 中国矿业大学 | Microwave-assisted extraction and hydrofracture cooperative coal seam anti-reflection method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8839875B2 (en) * | 2009-12-28 | 2014-09-23 | Ben M. Enis | Method and apparatus for sequestering CO2 gas and releasing natural gas from coal and gas shale formations |
| CN102168544B (en) * | 2011-03-28 | 2014-04-16 | 河南理工大学 | Method for surface modification and transmission increase of coal reservoirs by using chlorine dioxide |
| RU2566883C1 (en) * | 2014-04-16 | 2015-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" | Method of hydraulic treatment of coal bed |
| CN103993901B (en) * | 2014-04-25 | 2018-04-20 | 河南理工大学 | A kind of projecting coal bed drilling waterpower is handled up anti-reflection method |
| CN105134284B (en) * | 2015-08-03 | 2017-05-31 | 中国矿业大学 | One kind is based on horizontal orientation drilling liquid nitrogen circulating freezing resistance anti-reflection mash gas extraction method |
-
2017
- 2017-03-06 CN CN201710127893.XA patent/CN106930746B/en active Active
- 2017-06-26 WO PCT/CN2017/089969 patent/WO2018161470A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070151729A1 (en) * | 2006-01-04 | 2007-07-05 | Halliburton Energy Services, Inc. | Methods of stimulating liquid-sensitive subterranean formations |
| CN202023547U (en) * | 2011-04-29 | 2011-11-02 | 中国矿业大学 | Coal mine underground pulsed hydraulic fracturing equipment |
| CN103541710A (en) * | 2013-10-16 | 2014-01-29 | 中国矿业大学 | Method for forcedly draining gas from underground gas and liquid alternate phase-drive fracture coal of coal mine |
| CN104632270A (en) * | 2015-01-06 | 2015-05-20 | 中国矿业大学 | Oscillating impulse type high-energy gas fracturing and heat injection alternating gas-extracting method |
| CN105484720A (en) * | 2015-12-29 | 2016-04-13 | 中国矿业大学 | Microwave-assisted extraction and hydrofracture cooperative coal seam anti-reflection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106930746A (en) | 2017-07-07 |
| WO2018161470A1 (en) | 2018-09-13 |
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