CN109798095A - A kind of coal-bed-gas production-increase pressure disturbance device and method for increasing yield of coal bed gas - Google Patents
A kind of coal-bed-gas production-increase pressure disturbance device and method for increasing yield of coal bed gas Download PDFInfo
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- CN109798095A CN109798095A CN201910175820.7A CN201910175820A CN109798095A CN 109798095 A CN109798095 A CN 109798095A CN 201910175820 A CN201910175820 A CN 201910175820A CN 109798095 A CN109798095 A CN 109798095A
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Abstract
The present invention relates to a kind of coal-bed-gas production-increase pressure disturbance devices and method for increasing yield of coal bed gas, first emptying will be extracted out by the sewage inside sleeve pipe in coal seam when use, close pumping unit, pass through air compressor machine, nitrogen making machine and gas compressor disturb compressed nitrogen in gas sprue bushing, gas is disturbed by the crack injection coal seam in the intercommunicating pore and coal seam on casing, stop gas injection when reaching setting pressure, close the first valve, then open the second valve, it is connected to fuel gas and dust separator with escape pipe, coal bed gas and coal dust in coal seam can be in the disturbance gas sleeve pipe of injection and entering in gas-dust separator by escape pipe and are filtered separation, gas, which enters, is acquired coal bed gas in gas transmission line, coal dust is separated, also some coal dust sinks to sleeve bottom under the effect of gravity.
Description
Technical field
The present invention relates to cbm development fields, and in particular to a kind of coal-bed-gas production-increase pressure disturbance device and coal bed gas
Method for increasing.
Background technique
China is the country of coal more than one, and coal occupies 60% of energy-consuming or more, a large amount of methane gas is adsorbed in coal
Body is commonly called as methane gas or coal bed gas.The difference of coal bed gas and conventional gas is storing state, after the former is adsorbed state
Person is free state.Compared with conventional gas, coal bed gas is referred to as non-conventional gas.Coal bed gas is both high-grade energy and coal mine
The security risk of exploitation.
As China has formulated subsidy to non-conventional gas exploitation and the attention of Safety of Coal Mine Production, the exploitation for coal bed gas
Policy encourages the exploitation of all trades and professions investment coal bed gas.Everybody relies on the mature technology of the construction of natural gas fields, opens coal bed gas
Hair, poor effect, well yield are extremely low.
Existing coal-bed gas exploitation commonly uses the devices such as pumping unit, casing and the oil pipe that is set in casing, in oil pipe
Equipped with sucker rod, the upper end of sucker rod is connect with pumping unit is pumped and is drawn water.Casing is placed in underground, sleeve bottom passes through
Coal seam, there are crack in coal seam, in being provided with intercommunicating pore in the covering part of coal seam on casing, in coal seam water and coal seam
Gas sleeve pipe.The upper end of casing is provided with escape pipe, is connected with aspiration pump on escape pipe, for taking out the coal bed gas in casing
Out.But main problem is present in conventional gas during output, the not generation of solid powder, the seepage flow of natural gas is logical
Road is unimpeded always.And coal bed gas is during output, due to the decline of coal seam pressure, a large amount of coal dusts are generated, and block coal bed gas
Seepage channel, to cause single well productivity lower.
Summary of the invention
The object of the present invention is to provide a kind of coal-bed-gas production-increase that can be improved single well productivity pressure disturbance devices；Simultaneously
The above-mentioned coal-bed-gas production-increase method for increasing yield of coal bed gas of pressure disturbance device is used the object of the invention is also to provide a kind of.
To achieve the above object, a kind of coal-bed-gas production-increase of the invention is adopted the following technical scheme that with pressure disturbance device
A kind of coal-bed-gas production-increase pressure disturbance device, it is characterised in that: be used for including what is be connected to for the escape pipe with sleeve upper end
The gas compressor of disturbance gas is passed through into casing, gas compressor, which is connected with, send nitrogen in the nitrogen processed into gas compressor
Machine, nitrogen making machine are connected with for sending air to the air compressor machine into nitrogen making machine, and escape pipe passes through three-way connection and gas compressor
Connection, another connector of three-way connection are connected with gas-dust separator, the connection between three-way connection and gas compressor
Pipeline is equipped with the first valve, is provided with the second valve on the connecting pipe between three-way connection and gas-dust separator.
A kind of method for increasing yield of coal bed gas using above-mentioned coal-bed-gas production-increase pressure disturbance device of the invention is using as follows
Technical solution: method for increasing yield of coal bed gas, including step is pressed below:
1) emptying will be extracted out by the water in sleeve pipe in coal seam using pumping unit；
2) compressed air is sent to nitrogen making machine by air compressor machine, nitrogen making machine send nitrogen to gas compressor, will by gas compressor
Compressed nitrogen disturbs gas and is passed through in casing, disturbs gas by the intercommunicating pore on casing wall and enters splitting in coal seam
It in gap, and then disturbs gas and expands in entire coal seam and contact mixing with the coal bed gas in coal seam, pressure reaches in casing
Stop the conveying disturbance gas into casing when setting value, closes the first valve；
3) the second valve is opened, gas-dust separator and casing are connected to, the pressure in casing is discharged, the coal seam in coal seam
Gas and coal dust enter in casing with disturbance gas, by gas-dust separator by pulverized-coal filtering, by coal bed gas and disturb
Body of taking offence is conveyed.
In step 2, pressure set points are 5MPa in casing.
In step 2, when set overpressure reaches 5MPa, stop gas injection 5 hours.
In step 3), after the pressure release in casing, step 2 and step 3) are repeated, repeatedly pressurization and pressure release, make coal
Layer " breathing " gets up.
Beneficial effects of the present invention: first emptying will be extracted out by the sewage inside sleeve pipe in coal seam when use, closes and takes out
Oil machine is disturbed compressed nitrogen in gas sprue bushing by air compressor machine, nitrogen making machine and gas compressor, and disturbance gas passes through
In crack injection coal seam in intercommunicating pore and coal seam on casing, stops gas injection when reaching setting pressure, close the first valve, and
After open the second valve, be connected to fuel gas and dust separator with escape pipe, the coal bed gas and coal dust in coal seam can be with injections
Disturbance gas sleeve pipe in and enter gas-dust separator kind by escape pipe and be filtered separation, gas is into defeated
Coal bed gas is acquired in gas pipeline, coal dust is separated, and also some coal dust sinks to sleeve bottom under the effect of gravity.
Further, it is possible to repeatedly carry out repeating the pressurization and pressure release in above-mentioned movement realization well, make coal seam " breathing ",
To achieve the purpose that pressure disturbance coal seam.By multiple pressure disturbance, seepage channel is dredged, the parsing of coal bed gas is excited；
Coal dust blocking seepage channel is also avoided simultaneously, achievees the purpose that volume increase.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of one embodiment of coal-bed-gas production-increase pressure disturbance device of the invention.
Specific embodiment
The embodiment of a kind of coal-bed-gas production-increase pressure disturbance device of the invention, as shown in Figure 1, including that bottom passes through coal
The casing 1 of layer, in being provided with intercommunicating pore in the covering part of coal seam on casing 1, water, gas and coal dust can pass through intercommunicating pore.Casing 1
In be provided with oil pipe 4, beam hanger 5 is provided in oil pipe, the upper end of beam hanger is connected with pumping unit 9, and the lower end of beam hanger is provided with oil pump
8.The upper end of casing 1 is communicated with escape pipe 16, and the upper end of oil pipe is provided with water flowing out structure 10, for the water in casing to be drained into storage
Pond.The above technology is the prior art, its specific structure is not described in detail in this patent.Outlet pipe 11 passes through three-way connection
17 are communicated with the gas compressor 12 for being passed through disturbance gas into casing, and gas compressor 12, which is connected with, send nitrogen to gas
Nitrogen making machine 13 in gas compressor, nitrogen making machine are connected with for air to be sent to the air compressor machine 14 into nitrogen making machine.Three-way connection 17
Another connector be connected with gas-dust separator 18, feed-line 19 is additionally provided on gas-dust separator 18.Threeway
Connecting pipe between connector 17 and gas compressor 12 is equipped with the first valve 15, three-way connection 17 and gas-dust separation
The second valve 16 is provided on connecting pipe between device 18.
A kind of coal-bed-gas production-increase of the invention when in use, contains water 6 and coal bed gas 7 with pressure disturbance device in coal seam 2,
Emptying must will be extracted out by the sewage in 2 sleeve pipe of coal seam by pumping unit before pressurization in casing, make the pressurization in later period and let out
Press it is unblocked, water emptying after close pumping unit；By air compressor machine, nitrogen making machine and gas compressor by compressed nitrogen, that is, disturbance gas
In body sprue bushing, disturbance gas injects in coal seam 2 by the crack 3 in the intercommunicating pore and coal seam on casing, reaches setting pressure
Stop gas injection when power, then open fuel gas and dust separator, the coal bed gas 7 and coal dust 20 in coal seam 2 can disturbing with injection
In body sleeve pipe of taking offence and enter gas-dust separator kind by escape pipe and be filtered separation, gas enters appendix
Coal bed gas is acquired in line, coal dust is separated, and also some coal dust sinks to sleeve bottom under the effect of gravity.Pressurization
Gas be nitrogen, the gas of pressure release is the mixture of the gases and nitrogen such as methane.It can repeatedly carry out repeating above-mentioned movement reality
Pressurization and pressure release in existing well, make coal seam " breathing ", to achieve the purpose that pressure disturbance coal seam.Pass through multiple pressure
Disturbance dredges seepage channel, excites the parsing of coal bed gas；Coal dust blocking seepage channel is also avoided simultaneously, reaches the mesh of volume increase
's.
It is of the invention a kind of using the above-mentioned coal-bed-gas production-increase method for increasing yield of coal bed gas of pressure disturbance device including following
Step:
1) emptying out is extracted the water in coal seam in sleeve pipe using pumping unit；
2) compressed air is sent to nitrogen making machine by air compressor machine, nitrogen making machine send nitrogen to gas compressor, will by gas compressor
Compressed nitrogen disturbs gas and is passed through in casing, disturbs gas by the intercommunicating pore on casing wall and enters splitting in coal seam
It in gap, and then disturbs gas and expands in entire coal seam and contact mixing with the coal bed gas in coal seam, pressure reaches in casing
Stop the conveying disturbance gas into casing when setting value, closes the first valve；
3) the second valve is opened, gas-dust separator and casing are connected to, the pressure in casing is discharged, the coal seam in coal seam
Gas and coal dust enter in casing with disturbance gas, by gas-dust separator by pulverized-coal filtering, by coal bed gas and disturb
Body of taking offence is conveyed.
In step 2, pressure set points are 5MPa in pipe.
In step 2, when set overpressure reaches 5MPa, stop gas injection 5 hours.
In step 3), after the pressure release in casing, step 2 and step 3) are repeated, repeatedly pressurization and pressure release, make coal
Layer " breathing " gets up.
In other embodiments of the invention, stop gas injection when gas pressure may be 2MPa in casing；It can also root
It is adjusted according to realistic well condition, for example, 1MPa；The time for stopping gas injection can also being adjusted according to the actual situation.
Claims (5)
1. a kind of coal-bed-gas production-increase pressure disturbance device, it is characterised in that: including being connected to for the escape pipe with sleeve upper end
For be passed through into casing disturbance gas gas compressor, gas compressor, which is connected with, send nitrogen into gas compressor
Nitrogen making machine, nitrogen making machine is connected with for sending air to the air compressor machine into nitrogen making machine, and escape pipe passes through three-way connection and gas
Compressor connection, another connector of three-way connection is connected with gas-dust separator, between three-way connection and gas compressor
Connecting pipe be equipped with the first valve, be provided with second on the connecting pipe between three-way connection and gas-dust separator
Valve.
2. it is a kind of using the coal-bed-gas production-increase as described in claim 1 method for increasing yield of coal bed gas of pressure disturbance device, it is special
Sign is, including presses step below:
1) emptying will be extracted out by the water in sleeve pipe in coal seam using pumping unit；
2) compressed air is sent to nitrogen making machine by air compressor machine, nitrogen making machine send nitrogen to gas compressor, will by gas compressor
Compressed nitrogen disturbs gas and is passed through in casing, disturbs gas by the intercommunicating pore on casing wall and enters splitting in coal seam
It in gap, and then disturbs gas and expands in entire coal seam and contact mixing with the coal bed gas in coal seam, pressure, which reaches, in casing sets
Stop the conveying disturbance gas into casing when definite value, closes the first valve；
3) the second valve is opened, gas-dust separator and casing are connected to, the pressure in casing is discharged, the coal seam in coal seam
Gas and coal dust enter in casing with disturbance gas, by gas-dust separator by pulverized-coal filtering, by coal bed gas and disturb
Body of taking offence is conveyed.
3. method for increasing yield of coal bed gas according to claim 2, it is characterised in that: in step 2, pressure is set in casing
Value is 5MPa.
4. method for increasing yield of coal bed gas according to claim 3, it is characterised in that: in step 2, when set overpressure reaches
When to 5MPa, stop gas injection 5 hours.
5. method for increasing yield of coal bed gas according to claim 2, it is characterised in that: in step 3), the pressure in casing is released
After putting, step 2 and step 3) are repeated, repeatedly pressurization and pressure release, make coal seam " breathing ".
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175820.7A CN109798095A (en) | 2019-03-08 | 2019-03-08 | A kind of coal-bed-gas production-increase pressure disturbance device and method for increasing yield of coal bed gas |
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| CN201910175820.7A CN109798095A (en) | 2019-03-08 | 2019-03-08 | A kind of coal-bed-gas production-increase pressure disturbance device and method for increasing yield of coal bed gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855088A (en) * | 2021-04-06 | 2021-05-28 | 中联煤层气有限责任公司 | Method for improving gas production rate of coal bed |
| CN113234503A (en) * | 2021-06-03 | 2021-08-10 | 中国地质大学（北京） | Low-coal-rank coal bed gas high-efficiency mining dust treatment device |
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| WO2018170830A1 (en) * | 2017-03-23 | 2018-09-27 | 陈信平 | Method for increasing production of coal bed gas by injecting high temperature air |
| CN108661603A (en) * | 2018-05-15 | 2018-10-16 | 西南石油大学 | Nitrogen injection induces coal seam and improves Methane Recovery Recovery method from transformation |
| CN108729891A (en) * | 2018-05-04 | 2018-11-02 | 北京方圆天地油气技术有限责任公司 | A kind of CBM Fracturing blocking more bout compressed air method for removing blockage of well |
| CN209724305U (en) * | 2019-03-08 | 2019-12-03 | 南阳市天达同兴石油技术有限公司 | A kind of coal-bed-gas production-increase pressure disturbance device |
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2019
- 2019-03-08 CN CN201910175820.7A patent/CN109798095A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105317411A (en) * | 2014-08-03 | 2016-02-10 | 山东拓普石油装备有限公司 | High-pressure, oxygen-free, yield-increasing and plug-release gas injection device of CBM (Coal Bed Methane) well and using method of high-pressure, oxygen-free, yield-increasing and plug-release gas injection device |
| WO2018170830A1 (en) * | 2017-03-23 | 2018-09-27 | 陈信平 | Method for increasing production of coal bed gas by injecting high temperature air |
| CN107558962A (en) * | 2017-07-21 | 2018-01-09 | 山西晋城无烟煤矿业集团有限责任公司 | Concentric tube type batch-type gaslift drainage technology |
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| CN108661603A (en) * | 2018-05-15 | 2018-10-16 | 西南石油大学 | Nitrogen injection induces coal seam and improves Methane Recovery Recovery method from transformation |
| CN209724305U (en) * | 2019-03-08 | 2019-12-03 | 南阳市天达同兴石油技术有限公司 | A kind of coal-bed-gas production-increase pressure disturbance device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855088A (en) * | 2021-04-06 | 2021-05-28 | 中联煤层气有限责任公司 | Method for improving gas production rate of coal bed |
| CN113234503A (en) * | 2021-06-03 | 2021-08-10 | 中国地质大学（北京） | Low-coal-rank coal bed gas high-efficiency mining dust treatment device |
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