CN110439523A - Gas drainage technique based on burning detonation fracturing - Google Patents
Gas drainage technique based on burning detonation fracturing Download PDFInfo
- Publication number
- CN110439523A CN110439523A CN201910766003.9A CN201910766003A CN110439523A CN 110439523 A CN110439523 A CN 110439523A CN 201910766003 A CN201910766003 A CN 201910766003A CN 110439523 A CN110439523 A CN 110439523A
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- Prior art keywords
- carbon dioxide
- fracturing
- fracturing device
- gas
- methane gas
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- 238000005474 detonation Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 164
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 80
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 80
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000003245 coal Substances 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000005065 mining Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 229960004424 carbon dioxide Drugs 0.000 claims description 77
- 239000007788 liquid Substances 0.000 claims description 11
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 4
- -1 at the same time Chemical compound 0.000 claims 1
- 238000001727 in vivo Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 230000001052 transient effect Effects 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
- E21B43/006—Production of coal-bed methane
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
-
- 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a kind of gas drainage techniques based on burning detonation fracturing, altogether include five steps；Injection hole is added in the tail end of carbon dioxide fracturing device, which is connected with big flow mesolow injecting mechanism, big flow mesolow injecting mechanism is connected with air supply system, and closes the shut-off valve on mining high-voltage hose；It will be in the push-in drilling of carbon dioxide fracturing device and by borehole sealing by drilling machine；Make carbon dioxide fracturing device burning expansion fracturing by control device for detonation of electric；Open the shut-off valve on mining high-voltage hose, the carbon dioxide gas that injection pressure is 7-10MPa into carbon dioxide fracturing device by air supply system, big flow mesolow injecting mechanism, methane gas displacement in coal seam is come out, at the same time, methane gas extraction is carried out by methane gas drainage holes set in addition.Using the carbon dioxide fracturing device fracturing of existing burning detonation, then the displacement that carbon dioxide fracturing device carries out methane gas is borrowed, gas drainage is high-efficient.
Description
Technical field
The invention belongs to coal bed gas extraction technical fields, and in particular to a kind of gas drainage based on burning detonation fracturing
Technique.
Background technique
Carbon dioxide fracturing device is using liquid carbon dioxide by thermal evaporation expansion, quick release high pressure gas fracture coal
Layer, solves and blew exploitation up with dynamite in the past, the defect that destructive is big in presplitting and risk is high improves to a certain extent
The safety of coal mining and presplitting, therefore it is widely used in coal mine operation.
The principle of carbon dioxide fracturing is: carbon dioxide exists when being lower than 31 DEG C with liquid, and while surmounting 31 DEG C starts
Gasification, and as the change pressure of temperature is also constantly changing.Using this feature of carbon dioxide, in fracturing device supervisor
It fills a certain amount of liquid carbon dioxide (usually 1.5kg or so), while being also equipped with igniter head, combustion in fracturing device supervisor
Stick and level pressure rupture diaphragm are burnt, igniter head is controlled using initiator and burner is caused to be burnt, to be heated to liquid carbon dioxide, is made
Liquid carbon dioxide transient evaporation shrinks and generates high pressure, and 600 times of volume contraction or more.When pressure reaches setting limit value,
The fracture of level pressure rupture diaphragm, high pressure gas acts on coal (rock) body from the relief hole release on release pipe, to reach coal seam cause
The purpose split.
Existing carbon dioxide fracturing device compares explosive charge fracturing, improves the safety of coal mining operation, but two
The liquid carbon dioxide carried in carbonoxide fracturing device is less, is only enough in the use of coal seam fracturing.In addition, also being needed after the fracturing of coal seam
In addition to drill using negative pressure carry out drainage from coal seam, extraction to the device in Gas scale of construction and coal seam in physical holding of the stock the device in Gas scale of construction
Ratio it is lower.
Summary of the invention
It is less for the included liquid carbon dioxide amount of existing carbon dioxide fracturing device, only it is enough in the limitation of coal seam fracturing
Property, while the limited problem of gas drainage amount in coal seam, the present invention is quasi- to provide a kind of gas drainage based on burning detonation fracturing
Technique.
For this purpose, the technical scheme adopted by the invention is as follows: a kind of gas drainage technique based on burning detonation fracturing, including
Following steps:
Step 1 adds injection hole in the tail end of carbon dioxide fracturing device, by the injection hole by mining high-voltage hose with
Big flow mesolow injecting mechanism is connected, and big flow mesolow injecting mechanism is connected by pipeline with air supply system, and closes mine
With the shut-off valve on high-pressure hose；
The rear end of carbon dioxide fracturing device is connected with the front end of bag type paste hole packer, passes through the drilling rod of drilling machine by step 2
It is against the rear end of bag type paste hole packer, thus by carbon dioxide fracturing device and bag type paste hole packer (8) push-in drilling, to pouch
The inflation of formula hole packer is thus by borehole sealing；
Step 3 makes the liquid carbon dioxide burning expansion in carbon dioxide fracturing device, level pressure by control device for detonation of electric
Rupture diaphragm rupture, to realize the fracturing of working seam；
Step 4, open mining high-voltage hose on shut-off valve, by air supply system, big flow mesolow injecting mechanism to
Injection pressure is the carbon dioxide gas of 7-10MPa in carbon dioxide fracturing device, is arranged by the relief hole of carbon dioxide fracturing device
In working seam after entering fracturing, the methane gas displacement in coal seam is come out by carbon dioxide, at the same time, by addition
The methane gas drainage holes of setting carry out methane gas extraction；
Step 5, the carbon dioxide gas that continuously injection pressure is 7-10MPa into carbon dioxide fracturing device,
The displacement and extraction of methane gas are carried out simultaneously, until extraction finishes.
The air supply system includes co 2 liquefaction module, carbon dioxide accumulating tank, two as a preferred embodiment of the above solution,
Carbonoxide filling components, three, which is integrated in same cabinet, constitutes air supply system.Air supply system has liquefaction, storage and transportation and filling function
Energy, and be integrally designed using integrated form, convenient for management, and it is transported to also more convenient when the progress drainage from coal seam operation of field.
Further preferably, it is provided with along the length direction and circumferencial direction of the release pipe of the carbon dioxide fracturing device
On the one hand several relief holes can be further reduced the time of displacement, improve displacement efficiency；On the other hand it also ensures that from all directions
The gas displacement without dead angle is carried out, the gas drainage amount in coal seam is improved.
Beneficial effects of the present invention: working seam is realized using the carbon dioxide fracturing device of existing burning detonation first
Fracturing, then the displacement that carbon dioxide fracturing device carries out methane gas is borrowed, the dual-use material of carbon dioxide fracturing device is realized, is grasped
Facilitate, and gas drainage is high-efficient.
Detailed description of the invention
Fig. 1 is simple schematic diagram of the invention.
Fig. 2 is the connection schematic diagram of drilling machine, carbon dioxide fracturing device, hole packer, hand booster pump.
Fig. 3 is connection schematic diagram of the invention.
Specific embodiment
By way of example and in conjunction with the accompanying drawings, the invention will be further described:
In conjunction with shown in Fig. 1-Fig. 3, a kind of gas drainage technique based on burning detonation fracturing, comprising the following steps:
Step 1 adds injection hole in the tail end of carbon dioxide fracturing device 4, which is passed through mining high-voltage hose 6
It is connected with big flow mesolow injecting mechanism 5, big flow mesolow injecting mechanism 5 is connected by pipeline with air supply system, and is closed
Close the shut-off valve on mining high-voltage hose 6.
Preferably, air supply system includes co 2 liquefaction module 1, carbon dioxide accumulating tank, carbon dioxide filling components
3, three, which is integrated in same cabinet, constitutes air supply system.The gas source has co 2 liquefaction, storage and transportation and perfusion functional, can lead to
It crosses pipeline to be connected with big flow mesolow injecting mechanism 5, carbon dioxide is perfused for big flow mesolow injecting mechanism 5, and pass through
Big flow mesolow injecting mechanism 5 is sent into carbon dioxide fracturing device 4 after being pressurized.
The rear end of carbon dioxide fracturing device 4 is connected with the front end of bag type paste hole packer 8, passes through the brill of drilling machine 7 by step 2
Bar is against the rear end of bag type paste hole packer 8 to which carbon dioxide fracturing device 4 and bag type paste hole packer 8 to be pushed into drilling, to capsule
The inflation of pocket type hole packer 8 is thus by borehole sealing.Preferably, it is inflated by hand booster pump 9 to bag type paste hole packer 8.Using
Carbon dioxide fracturing device 4 and bag type paste hole packer 8 are pushed into drilling by drilling machine, without being pushed using hydraulic pusher, are
Because drilling machine first drills, just borrow at the construction field (site).Drilling machine can be used to drilling and being used for carbon dioxide fracturing device and capsule
The push of pocket type hole packer.
Step 3 makes the liquid carbon dioxide burning expansion in carbon dioxide fracturing device 4, level pressure by control device for detonation of electric
Rupture diaphragm rupture, to realize the fracturing of working seam.
Step 4 opens the shut-off valve on mining high-voltage hose 6, passes through air supply system, big flow mesolow injecting mechanism 5
Into carbon dioxide fracturing device 4, injection pressure is the carbon dioxide gas of 7-10MPa, passes through the release of carbon dioxide fracturing device 4
Hole is discharged into the working seam after fracturing, is come out the methane gas displacement in coal seam by carbon dioxide, at the same time, is passed through
Methane gas drainage holes set in addition carry out methane gas extraction.
Step 5, the carbon dioxide gas that continuously injection pressure is 7-10MPa into carbon dioxide fracturing device 4,
In working seam after being discharged into fracturing by the relief hole of carbon dioxide fracturing device 4, by carbon dioxide by the gas in coal seam
Gas displacement comes out, and at the same time, carries out methane gas extraction by methane gas drainage holes set in addition.
The length direction and circumferencial direction of the release pipe of carbon dioxide fracturing device 4 are provided with several relief holes.
Step 6, the carbon dioxide gas that continuously injection pressure is 7-10MPa into carbon dioxide fracturing device 4,
The displacement and extraction of methane gas are carried out simultaneously, until extraction finishes.
Existing carbon dioxide fracturing device is provided with igniter head, burner, level pressure rupture diaphragm and release pipe, while also holding
There is liquid carbon dioxide, is lighted a fire by the control device for detonation of electric outside drilling, coal seam fracturing is made after detonation, but there is still a need for pass through
The methane gas in coal seam is taken out in drilling using negative pressure.The present invention can be to two by air supply system, big flow mesolow injecting mechanism 5
Injection pressure is the carbon dioxide gas of 7-10MPa in carbonoxide fracturing device 4, is arranged by the relief hole of carbon dioxide fracturing device 4
In working seam after entering fracturing, the displacement of methane gas is realized.
The present invention is based on used carbon dioxide fracturing devices 4 to be transformed, by adding air supply system, big flow mesolow
Injecting mechanism 5 etc. can inject a large amount of mesolow carbon dioxide gas into carbon dioxide fracturing device 4, be caused by carbon dioxide
The relief hole for splitting device 4 is discharged into the working seam after fracturing, realizes the displacement of methane gas.Since carbon dioxide gas is adsorbed in coal seam
The ability of body is far longer than the ability of adsorption gas gas, therefore can quickly come out the gas displacement in coal seam, is convenient for coal seam
The extraction of methane gas.
Claims (3)
1. a kind of gas drainage technique based on burning detonation fracturing, which comprises the following steps:
Step 1 adds injection hole in the tail end of carbon dioxide fracturing device (4), which is passed through mining high-voltage hose (6)
It is connected with big flow mesolow injecting mechanism (5), big flow mesolow injecting mechanism (5) is connected by pipeline with air supply system,
And close the shut-off valve on mining high-voltage hose (6)；
The rear end of carbon dioxide fracturing device (4) is connected with the front end of bag type paste hole packer (8), passes through drilling machine (7) by step 2
Drilling rod is against the rear end of bag type paste hole packer (8) to which carbon dioxide fracturing device (4) and bag type paste hole packer (8) push-in drill
It is interior, it is inflated to bag type paste hole packer (8) thus by borehole sealing；
Step 3 makes the liquid carbon dioxide burning expansion in carbon dioxide fracturing device (4) by control device for detonation of electric, and level pressure is broken
Sliver rupture, to realize the fracturing of working seam；
Step 4 opens the shut-off valve on mining high-voltage hose (6), passes through air supply system, big flow mesolow injecting mechanism (5)
The carbon dioxide gas for being 7-10MPa to carbon dioxide fracturing device (4) interior injection pressure, passes through carbon dioxide fracturing device (4)
Relief hole is discharged into the working seam after fracturing, is come out the methane gas displacement in coal seam by carbon dioxide, at the same time,
Methane gas extraction is carried out by methane gas drainage holes set in addition；
Step 5, the carbon dioxide gas for being continuously 7-10MPa to carbon dioxide fracturing device (4) interior injection pressure, together
The displacement and extraction of Shi Jinhang methane gas, until extraction finishes.
2. the gas drainage technique described in accordance with the claim 1 based on burning detonation fracturing, it is characterised in that: the gas source system
System includes co 2 liquefaction module (1), carbon dioxide accumulating tank, carbon dioxide filling components (3), and three is integrated in same case
Air supply system is constituted in vivo.
3. the gas drainage technique described in accordance with the claim 1 based on burning detonation fracturing, it is characterised in that: along described two
The length direction and circumferencial direction of the release pipe of carbonoxide fracturing device (4) are provided with several relief holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766003.9A CN110439523B (en) | 2019-08-19 | 2019-08-19 | Gas extraction process based on combustion initiation cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766003.9A CN110439523B (en) | 2019-08-19 | 2019-08-19 | Gas extraction process based on combustion initiation cracking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110439523A true CN110439523A (en) | 2019-11-12 |
| CN110439523B CN110439523B (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910766003.9A Active CN110439523B (en) | 2019-08-19 | 2019-08-19 | Gas extraction process based on combustion initiation cracking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608629A (en) * | 2020-06-16 | 2020-09-01 | 江苏中控能源科技有限公司 | Carbon dioxide pulse type fracturing device and fracturing method thereof |
-
2019
- 2019-08-19 CN CN201910766003.9A patent/CN110439523B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608629A (en) * | 2020-06-16 | 2020-09-01 | 江苏中控能源科技有限公司 | Carbon dioxide pulse type fracturing device and fracturing method thereof |
| CN111608629B (en) * | 2020-06-16 | 2022-01-18 | 江苏中控能源科技有限公司 | Carbon dioxide pulse type fracturing device and fracturing method thereof |
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| Publication number | Publication date |
|---|---|
| CN110439523B (en) | 2021-03-02 |
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