CN109577922A - A kind of method of coal-bed-gas production-increase - Google Patents
A kind of method of coal-bed-gas production-increase Download PDFInfo
- Publication number
- CN109577922A CN109577922A CN201811444666.0A CN201811444666A CN109577922A CN 109577922 A CN109577922 A CN 109577922A CN 201811444666 A CN201811444666 A CN 201811444666A CN 109577922 A CN109577922 A CN 109577922A
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- China
- Prior art keywords
- coal
- gas
- injection device
- carbon dioxide
- bed
- Prior art date
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Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 239000003245 coal Substances 0.000 claims abstract description 44
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 29
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 29
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000003034 coal gas Substances 0.000 claims abstract description 7
- 238000004080 punching Methods 0.000 claims abstract description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000000116 mitigating effect Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 238000003339 best practice Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The present invention relates to the technical fields of energy volume increase, more particularly to a kind of method of coal-bed-gas production-increase；The anatonosis and mitigation effect of its absorption advantage for taking into account carbon dioxide and nitrogen, reducing emission of carbon dioxide and methane, increase the quantum of output of coal bed gas while improving the recovery ratio and single rate of coal bed gas；The following steps are included: carrying out punching exploration to target position, it is measured and is measured, coal gas layer and coal seam position are surveyed, survey location is punched after exploration, nitrogen gas tank output end is connected to carbon dioxide tank output end with the input terminal of injection device, the injection ratio for controlling carbon dioxide tank and nitrogen gas tank is 1:2, use pressurizing device, to carrying out being forced into 10MPa in injection device, carbon dioxide and nitrogen are injected into coal bed gas simultaneously, the hole of injection device input terminal is sealed up for safekeeping, sealing of hole carries out the exploitation of coal bed gas after terminating 4 days.
Description
Technical field
The present invention relates to the technical fields of energy volume increase, more particularly to a kind of method of coal-bed-gas production-increase.
Background technique
It is stored in coal seam it is well known that coal bed gas refers to using methane as main component, to be adsorbed on matrix of coal particle table
Based on face, the hydrocarbon gas for being partially free in coal hole or being dissolved in coal seam water is the associated minerals resource of coal, is belonged to very
Natural gas is advised, is the clean high-grade energy and industrial chemicals to emerge in the world in nearly ten or twenty year, calorific value is the 2-5 of general coal
Times, it can be used as the energy to a certain extent and used instead of coal, in Current resource natural environment in short supply, coal bed gas can reduce coal
It uses, while very clean after coal bed gas burning, environmental pollution is smaller, and the influence after reduction coal combustion to air quality subtracts
The generation of few haze；The method of existing coal-bed-gas production-increase is mainly insufflation, and insufflation is by gas (natural gas, titanium dioxide
Carbon, nitrogen or air) it is injected into oil reservoir by injection well, the method to supplement and keep oil layer energy；Existing coal bed gas
Found in the method use of volume increase, carbon dioxide displacement coal bed gas Technical comparing be suitable for Thief zone and can not working seam, it is right
In China's hyposmosis and can working seam have compared with big limitation, and nitrogen flooding for coal gas layer technology competition adsorption capacity it is smaller, coal
Layer gas quantum of output is lower.
Summary of the invention
In order to solve the above technical problems, the present invention provide it is a kind of take into account carbon dioxide advantage absorption and nitrogen anatonosis and
Mitigation effect, reducing emission of carbon dioxide and methane, increase the production of coal bed gas while improving the recovery ratio and single rate of coal bed gas
The method of the coal-bed-gas production-increase of output.
A kind of method of coal-bed-gas production-increase of the invention, comprising the following steps:
(1) site survey: punching exploration is carried out to target position, it is measured and is measured, to coal gas layer and coal seam
Position is surveyed；
(2) it punches: survey location being punched after exploration, and in installing injection device in hole, by injection device lower end
Hole bottom end is squeezed into, injection device top is stayed loaded on the upside of ground；
(3) gas injects: nitrogen gas tank and carbon dioxide tank being placed in by injection device, and by nitrogen gas tank output end and titanium dioxide
Canister output end is connected to the input terminal of injection device, is controlled the flow velocity of carbon dioxide tank and nitrogen gas tank, is controlled titanium dioxide with this
The injection ratio of carbon and nitrogen, using pressurizing device, to carrying out being forced into unfavourable pressure in injection device, while by carbon dioxide
It is injected into coal bed gas with nitrogen；
(4) sealing of hole: the hole of injection device input terminal is sealed up for safekeeping；
(5) coal-bed gas exploitation: sealing of hole carries out the exploitation of coal bed gas after terminating a period of time.
A kind of method of coal-bed-gas production-increase of the invention, the injection ratio in step (3) are 1:0.5 to 1:3.
A kind of method of coal-bed-gas production-increase of the invention, the pressure in step (3) are 3-15MPa.
A kind of method of coal-bed-gas production-increase of the invention, a period of time in step (5) are 3-5 days.
Compared with prior art the invention has the benefit that by above-mentioned setting, the competition that can play carbon dioxide is inhaled
Attached ability, coal is stronger than methane to the adsorption capacity of carbon dioxide, and the carbon dioxide injected in mixed gas can promote methane de-
It is attached, meanwhile, the nitrogen injected in mixed gas can reduce partial pressure of the methane in coal seam, and it is de- also to play certain promotion methane
Attached effect；And mixed gas can play the anatonosis effect of nitrogen, after the nitrogen flooding in injection mixed gas replaces methane, coal seam
Contraction distortion is generated, plays the role of increase permeability, this is particularly important for the cbm development of China's low permeability coal seam.
Specific embodiment
With reference to embodiment, the embodiment of the present invention is furthur described in detail.Following embodiment is used for
Illustrate the present invention, but is not intended to limit the scope of the invention.
Embodiment 1
Punching exploration is carried out to target position, it is measured and is measured, coal gas layer and coal seam position are carried out
Exploration；
Survey location is punched after exploration, and in installing injection device in hole, bottom hole is squeezed into injection device lower end
End stays on injection device top loaded on the upside of ground；
Nitrogen gas tank and carbon dioxide tank are placed in by injection device, and by nitrogen gas tank output end and carbon dioxide tank output end with
The input terminal of injection device is connected to, and the injection ratio for controlling carbon dioxide tank and nitrogen gas tank is 1:0.5, right using pressurizing device
It carries out being forced into 3MPa in injection device, while carbon dioxide and nitrogen being injected into coal bed gas；
The hole of injection device input terminal is sealed up for safekeeping；
Sealing of hole carries out the exploitation of coal bed gas after terminating 3 days.
Embodiment 2
Punching exploration is carried out to target position, it is measured and is measured, coal gas layer and coal seam position are carried out
Exploration；
Survey location is punched after exploration, and in installing injection device in hole, bottom hole is squeezed into injection device lower end
End stays on injection device top loaded on the upside of ground；
Nitrogen gas tank and carbon dioxide tank are placed in by injection device, and by nitrogen gas tank output end and carbon dioxide tank output end with
The input terminal of injection device is connected to, and the injection ratio for controlling carbon dioxide tank and nitrogen gas tank is 1:2, using pressurizing device, to note
Enter to carry out being forced into device 10MPa, while carbon dioxide and nitrogen being injected into coal bed gas；
The hole of injection device input terminal is sealed up for safekeeping；
Sealing of hole carries out the exploitation of coal bed gas after terminating 4 days.
Embodiment 3
Punching exploration is carried out to target position, it is measured and is measured, coal gas layer and coal seam position are carried out
Exploration；
Survey location is punched after exploration, and in installing injection device in hole, bottom hole is squeezed into injection device lower end
End stays on injection device top loaded on the upside of ground；
Nitrogen gas tank and carbon dioxide tank are placed in by injection device, and by nitrogen gas tank output end and carbon dioxide tank output end with
The input terminal of injection device is connected to, and the injection ratio for controlling carbon dioxide tank and nitrogen gas tank is 1:3, using pressurizing device, to note
Enter to carry out being forced into device 15MPa, while carbon dioxide and nitrogen being injected into coal bed gas；
The hole of injection device input terminal is sealed up for safekeeping；
Sealing of hole carries out the exploitation of coal bed gas after terminating 5 days.
Choose everywhere similar coal bed gas field as experimental plot, respectively marked as 1# sample field, 2# sample field, 3# sample field and
4# sample field, 1# sample field, 2# sample field and 3# sample field are tested using embodiment 1 to embodiment 3 respectively, while 4# sample
Honda is tested using the prior art, using 4# sample field as radix, calculates the coal in 1# sample field, 2# sample field and 3# sample field
The rate of growth of layer gas, test result is as follows:
| Sample field | 1# | 2# | 3# |
| Coalbed Methane Production | 15% | 30% | 20% |
In conclusion a kind of method of coal-bed-gas production-increase of the invention is compared with the prior art, 1# sample field, 2# sample field and 3#
The Coalbed Methane Production of sample Tanaka increased, while 2# sample field coal seam quantum of output highest, therefore, one kind of the invention
Embodiment 2 is best practice in the method for coal-bed-gas production-increase.
A kind of method of coal-bed-gas production-increase of the invention before completing above-mentioned movement, will move first at work
The position needed to user.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications, these improvements and modifications can also be made
Also it should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of method of coal-bed-gas production-increase, which comprises the following steps:
(1) site survey: punching exploration is carried out to target position, it is measured and is measured, to coal gas layer and coal seam
Position is surveyed；
(2) it punches: survey location being punched after exploration, and in installing injection device in hole, by injection device lower end
Hole bottom end is squeezed into, injection device top is stayed loaded on the upside of ground；
(3) gas injects: nitrogen gas tank and carbon dioxide tank being placed in by injection device, and by nitrogen gas tank output end and titanium dioxide
Canister output end is connected to the input terminal of injection device, is controlled the flow velocity of carbon dioxide tank and nitrogen gas tank, is controlled titanium dioxide with this
The injection ratio of carbon and nitrogen, using pressurizing device, to carrying out being forced into unfavourable pressure in injection device, while by carbon dioxide
It is injected into coal bed gas with nitrogen；
(4) sealing of hole: the hole of injection device input terminal is sealed up for safekeeping；
(5) coal-bed gas exploitation: sealing of hole carries out the exploitation of coal bed gas after terminating a period of time.
2. a kind of method of coal-bed-gas production-increase as described in claim 1, which is characterized in that the injection ratio in step (3) is
1:0.5 to 1:3.
3. a kind of method of coal-bed-gas production-increase as claimed in claim 2, which is characterized in that the pressure in step (3) is 3-
15MPa。
4. a kind of method of coal-bed-gas production-increase as claimed in claim 3, which is characterized in that a period of time in step (5) is
3-5 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444666.0A CN109577922A (en) | 2018-11-29 | 2018-11-29 | A kind of method of coal-bed-gas production-increase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444666.0A CN109577922A (en) | 2018-11-29 | 2018-11-29 | A kind of method of coal-bed-gas production-increase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109577922A true CN109577922A (en) | 2019-04-05 |
Family
ID=65925641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811444666.0A Pending CN109577922A (en) | 2018-11-29 | 2018-11-29 | A kind of method of coal-bed-gas production-increase |
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| Country | Link |
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| CN (1) | CN109577922A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400034A (en) * | 1981-02-09 | 1983-08-23 | Mobil Oil Corporation | Coal comminution and recovery process using gas drying |
| CN101122222A (en) * | 2007-09-19 | 2008-02-13 | 中国科学院武汉岩土力学研究所 | Down-hole horizontal hole exploitation system for mixing gas displacing coal gas, and the method |
| CN201236672Y (en) * | 2008-08-29 | 2009-05-13 | 李继清 | Gas generator for petroleum thermal production |
| CN102168544A (en) * | 2011-03-28 | 2011-08-31 | 河南理工大学 | Method for surface modification and transmission increase of coal reservoirs by using chlorine dioxide |
| CN104747230A (en) * | 2015-03-02 | 2015-07-01 | 王肇东 | Coal mine well gas extraction device and use method thereof |
-
2018
- 2018-11-29 CN CN201811444666.0A patent/CN109577922A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400034A (en) * | 1981-02-09 | 1983-08-23 | Mobil Oil Corporation | Coal comminution and recovery process using gas drying |
| CN101122222A (en) * | 2007-09-19 | 2008-02-13 | 中国科学院武汉岩土力学研究所 | Down-hole horizontal hole exploitation system for mixing gas displacing coal gas, and the method |
| CN201236672Y (en) * | 2008-08-29 | 2009-05-13 | 李继清 | Gas generator for petroleum thermal production |
| CN102168544A (en) * | 2011-03-28 | 2011-08-31 | 河南理工大学 | Method for surface modification and transmission increase of coal reservoirs by using chlorine dioxide |
| CN104747230A (en) * | 2015-03-02 | 2015-07-01 | 王肇东 | Coal mine well gas extraction device and use method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190405 |
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