CN109630081A - A kind of coal bed drilling note high pressure-temperature vapor strengthens coal bed gas drainage device and method - Google Patents
A kind of coal bed drilling note high pressure-temperature vapor strengthens coal bed gas drainage device and method Download PDFInfo
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- CN109630081A CN109630081A CN201811495290.6A CN201811495290A CN109630081A CN 109630081 A CN109630081 A CN 109630081A CN 201811495290 A CN201811495290 A CN 201811495290A CN 109630081 A CN109630081 A CN 109630081A
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- 239000003245 coal Substances 0.000 title claims abstract description 129
- 238000005553 drilling Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 53
- 239000007924 injection Substances 0.000 claims abstract description 53
- 238000000605 extraction Methods 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000000284 extract Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 89
- 238000005086 pumping Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 210000004262 dental pulp cavity Anatomy 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims 4
- 238000005728 strengthening Methods 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention is that a kind of coal bed drilling infuses high pressure-temperature vapor reinforcing coal bed gas drainage device and method, is suitable for underground coal mine.Vapor injection hole and coal bed gas extraction borehole are alternately arranged in coal seam；230 DEG C of high-pressure steam is injected to vapor injection hole circulation simultaneously, heating coal seam is until its temperature stops injecting and uses hole packer sealing of hole when reaching 180 DEG C or so；Run through the mixed gas that coal bed gas extraction borehole extracts vapor and coal bed gas；Cooling processing is done to mixed gas, vapor is made to be liquefied as liquid water to the higher coal bed gas gas of isolated concentration.The present invention is applied to the coal bed gas extraction of region low air permeability coal seam, has many advantages, such as that extracting result is good, at low cost, auxiliary gas is easily separated.
Description
Technical field
The present invention relates to a kind of coal bed gas drainage device and methods, are particularly suitable for a kind of coal seam drilling that underground coal mine uses
It infuses high pressure-temperature vapor and strengthens coal bed gas drainage device and method in hole.
Background technique
Coal bed gas is both to endanger " the first killer " of mine safety production, if greatly utilizing and being a kind of efficient cleaning
The energy, each coal mining enterprise, China has been devoted to the extraction to coal bed gas in recent years, can China be widely present high watt of low-permeable
This coal seam, how to carry out effective coal bed gas extraction to such coal seam is a problem.
Currently, domestic and foreign scholars propose the anti-reflection technology of many low air permeability coal seams altogether, i.e., increased by making coal seam generate crack
Add its gas permeability, so that effective extraction to coal bed gas is completed, such as: waterpower isolates method, hydrofracturing method, deep hole blasting side
Method, but waterpower isolates method and requires have higher operation difficulty cutting logical between drilling；Although hydrofracturing method antireflective effect
It is good, but technique can serious polluted source, threat ecological environment and local resident's body using the water of a large amount of incorporation chemical substances
Body health；Complicated operation and is easy to happen contingency threat Safety of Coal Mine Production for deep hole blasting.It is being ground there are also some
The anti-reflection new technology in coal seam for studying carefully exploitation, is such as motivated by ultrasound anti-reflection production technique, but this technology it is not yet mature and complicated for operation, at
This is higher.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, a kind of pair of coal bed drilling hole wall is provided and carries out pressure break increasing
Thoroughly, high temperature promotes coal bed gas to be converted to free state enhanced gas extraction from ADSORPTION STATE, and coal-gas recovering is easy, coal bed drilling note at low cost
High pressure-temperature vapor strengthens coal bed gas drainage device and method.
To realize the above-mentioned technical purpose, coal bed drilling of the invention note high pressure-temperature vapor strengthens coal bed gas extraction dress
It sets, including the gas injection device spout being arranged on vapor output pipe, gas injection device spout and vapor efferent duct junction
Heat-resistant sealing ring equipped with fixing seal between borehole wall, gas injection device spout are equipped with real-time monitoring bore inner temperature
The pressure sensor of temperature sensor and monitoring bore inner gas pressure, temperature sensor and pressure sensor pass through conducting wire
It is connected with the display equipment being arranged on the outside of heat-resistant sealing ring, real-time display detection data.
A kind of coal bed drilling note high pressure-temperature vapor reinforcing coal bed gas pumping method, its step are as follows:
Step 1 is alternately arranged vapor injection hole and coal bed gas pumping on coal working face and driving face coal seam
Borehole；
Step 2, the high-pressure steam for injecting 230 DEG C to vapor injection hole circulation simultaneously using more root canal roads, injection
The high-temperature vapor in coal seam carries out continuous heating and pressure break to coal seam, when temperature sensor detection coal seam temperature reaches 180 DEG C
Stop injection vapor, and using hole packer to vapor injection hole sealing of hole；
Step 3 runs through the mixed gas that coal bed gas extraction borehole extracts vapor and coal bed gas；
Step 4 does cooling processing to mixed gas using U-tube is logical, and vapor is made to be liquefied as liquid water to separate
To coal bed gas gas.
The high-pressure steam that 230 DEG C are injected to vapor injection hole circulation, the steps include:
Start to inject 230 DEG C of high-pressure steams to vapor injection hole using vapor injection device, vapor is infused
Enter air pressure in drilling and be maintained at 1~2.5Mpa, the coal seam temperature around vapor injection hole will be slow raising and consume at this time
The heat of vapor is had been injected into, steam temperature can be reduced constantly, and coal seam temperature will be slow raising, when steam temperature is lower than
When unobvious to coal seam heating after 180 DEG C, steamed 230 DEG C of high pressure waters are injected to drilling again after the vapor cooled extraction
Gas；
It repeats the above steps, until coal seam is heated to 180 DEG C of purpose temperature, during which high-pressure steam also can be persistently to coal
Lamination is split, when detecting around vapor injection hole that coal seam is heated to up to 180 DEG C, it is believed that vapor is abundant to coal seam
Heating and pressure break.
Vapor injection hole described in step 1 and coal bed gas extraction borehole are all vertical drilling, boring radius 50
~180mm, hole depth are 40~150mm, and the spacing of adjacent two drilling is 1~2.5m.
When filling the water steam into vapor injection hole, by 3 real-time monitoring numerical value of pressure sensor by borehole gases pressure
Power is controlled in 1~2.5Mpa.
The extraction to mixed gas is quickly completed after to gas injection link, and coal bed gas pumping is maintained at during entire extraction
It is carried out under hot environment in borehole more than 100 DEG C of temperature.
The utility model has the advantages that
By recycling injection high-temperature high-pressure steam to coal bed drilling, high pressure draught meeting pressure break coal seam simultaneously acts on the present invention
On crack, make cracks in coal seam expansion perforation, the gas permeability in coal seam can be significantly improved；High temperature can promote ADSORPTION STATE coal bed gas
Desorption, keeps the extraction of coal bed gas more thorough；Mixed gas after extraction is through liquid easily separated, and isolating after cooling is handled
Water can be recycled；Advantage: for the exploitation of down-hole coal bed gas, there is construction is simple, at low cost and can be effective
Extraction is carried out to coal bed gas, improves the advantages of extraction rate.
Detailed description of the invention
Fig. 1 is coal working face drilling arrangement schematic diagram of the invention；
Fig. 2 is coal bed drift face drilling arrangement schematic diagram of the invention；
Fig. 3 is nozzle schematic device of the invention；
Fig. 4 is vapor injection hole operation schematic diagram of the invention；
Fig. 5 is coal bed gas extraction borehole operation schematic diagram of the invention.
In figure: a- vapor injection hole, b- coal bed gas extraction borehole, 1- gas injection device spout, 2- temperature sensor, 3-
Pressure sensor, 4- heat-resistant sealing ring, 5- high-temperature vapor, 6- free coal bed gas, 7- cracks in coal seam, 8- vapor and coal seam
The mixed gas of gas.
Specific implementation step
The embodiment of the present invention is described further with reference to the accompanying drawing:
As shown in figure 3, the note that coal bed gas concordant drilling note high pressure-temperature vapor enhanced gas extraction method of the invention uses
Device of air, including the gas injection device spout 1 being arranged on vapor output pipe, gas injection device spout 1 and vapor efferent duct
Junction is equipped with the heat-resistant sealing ring 4 of the fixing seal between borehole wall, and gas injection device spout 1 is equipped in real-time monitoring drilling
The temperature sensor 2 of portion's temperature and the pressure sensor 3 of monitoring bore inner gas pressure, temperature sensor 2 and pressure sensing
Device 3 is connected by conducting wire with the display equipment that 4 outside of heat-resistant sealing ring is arranged in, real-time display detection data.
A kind of coal bed drilling note high pressure-temperature vapor reinforcing coal bed gas pumping method, its step are as follows:
Step 1 is alternately arranged vapor injection hole and coal bed gas pumping on coal working face and driving face coal seam
Borehole；
In order to keep coal bed gas extraction more thorough, there are four vapor for arrangement as far as possible around each coal bed gas extraction borehole
Injection hole and the spacing of wells are 1~2.5m, and general four vapor distribution of boreholes are coal bed gas extraction borehole is upper and lower, Zuo He
Right four direction.The vapor injection hole and coal bed gas extraction borehole is all vertical drilling, and boring radius is 50~
180mm, hole depth are 40~150mm, and the spacing of adjacent two drilling is 1~2.5m；
As depicted in figs. 1 and 2 in coal working face drilling arrangement, the drilling that number is a is to fill the water the drilling of group I of steam,
The drilling that number is b is that the group II of mash gas extraction drills；If playing dry hole in coal bed drift face, drilling arrangement is such as Fig. 2 institute
Show, the drilling that number is a is to fill the water the drilling of group I of steam, and the drilling that number is b is that the group II of mash gas extraction drills.
Step 2, the high-pressure steam for injecting 230 DEG C to vapor injection hole circulation simultaneously using more root canal roads, injection
The high-temperature vapor in coal seam carries out continuous heating and pressure break to coal seam, when temperature sensor 2 detects coal seam temperature and reaches 180 DEG C
Stop injection vapor, and using hole packer to vapor injection hole sealing of hole；
As shown in figure 4, injecting 230 DEG C of high-pressure steam to vapor injection hole circulation, the steps include:
Start to inject 230 DEG C of high-pressure steams to vapor injection hole using vapor injection device, vapor is infused
Enter air pressure in drilling and be maintained at 1~2.5Mpa, the coal seam temperature around vapor injection hole will be slow raising and consume at this time
The heat of vapor is had been injected into, steam temperature can be reduced constantly, and coal seam temperature will be slow raising, when steam temperature is lower than
When unobvious to coal seam heating after 180 DEG C, steamed 230 DEG C of high pressure waters are injected to drilling again after the vapor cooled extraction
Gas；
It repeats the above steps, until coal seam is heated to 180 DEG C of purpose temperature, during which high-pressure steam also can be persistently to coal
Lamination is split, when detecting around vapor injection hole that coal seam is heated to up to 180 DEG C, it is believed that vapor is abundant to coal seam
Heating and pressure break；
When filling the water steam into vapor injection hole, by 3 real-time monitoring numerical value of pressure sensor by borehole gases pressure
Power is controlled in 1~2.5Mpa；
As shown in figure 5, step 3, run through coal bed gas extraction borehole extract vapor and coal bed gas mixed gas；It is whole
The process of a extraction to mixed gas is maintained under the hot environment in coal bed gas extraction borehole more than 100 DEG C of temperature and carries out；
Step 4 does cooling processing to mixed gas using U-tube is logical, and vapor is made to be liquefied as liquid water to separate
To coal bed gas gas.
Claims (6)
1. a kind of coal bed drilling note high pressure-temperature vapor strengthens coal bed gas drainage device, it is characterised in that: it includes that setting exists
Gas injection device spout (1) on vapor output pipe, gas injection device spout (1) and vapor efferent duct junction are equipped with and brill
The heat-resistant sealing ring (4) of fixing seal between the hole wall of hole, gas injection device spout (1) are equipped with the temperature of real-time monitoring bore inner temperature
It spends sensor (2) and monitors the pressure sensor (3) of bore inner gas pressure, temperature sensor (2) and pressure sensor (3)
It is connected by conducting wire with the display equipment being arranged on the outside of heat-resistant sealing ring (4), real-time display detection data.
2. a kind of coal seam drilling for strengthening coal bed gas drainage device using the note high pressure-temperature vapor of coal bed drilling described in claim 1
It infuses high pressure-temperature vapor and strengthens coal bed gas pumping method in hole, it is characterised in that steps are as follows:
Step 1 is alternately arranged vapor injection hole and coal bed gas extraction brill on coal working face and driving face coal seam
Hole；
Step 2, the high-pressure steam for injecting 230 DEG C to vapor injection hole circulation simultaneously using more root canal roads, inject coal seam
High-temperature vapor continuous heating and pressure break are carried out to coal seam, stop when temperature sensor (2) detection coal seam temperature reaches 180 DEG C
Vapor is only injected, and using hole packer to vapor injection hole sealing of hole；
Step 3 runs through the mixed gas that coal bed gas extraction borehole extracts vapor and coal bed gas；
Step 4 does cooling processing to mixed gas using U-tube is logical, and vapor is made to be liquefied as liquid water to isolated coal
Layer gas gas.
3. coal bed drilling note high pressure-temperature vapor according to claim 2 strengthens coal bed gas pumping method, feature exists
In: the high-pressure steam that 230 DEG C of injection is recycled to vapor injection hole the steps include:
Start to inject 230 DEG C of high-pressure steams to vapor injection hole using vapor injection device, injects steam into brill
Air pressure is maintained at 1~2.5Mpa in hole, and the coal seam temperature around vapor injection hole will be slow raising and consume and infused at this time
Enter the heat of vapor, steam temperature can be reduced constantly, and coal seam temperature will be slow raising, when steam temperature is lower than 180 DEG C
When unobvious to coal seam heating afterwards, 230 DEG C of high-pressure steams will be injected to drilling again after the vapor cooled extraction；
It repeats the above steps, until coal seam is heated to 180 DEG C of purpose temperature, during which high-pressure steam also can persistently be pressed coal seam
It splits, when detecting around vapor injection hole that coal seam is heated to up to 180 DEG C, it is believed that vapor sufficiently heats coal seam
And pressure break.
4. coal bed drilling note high pressure-temperature vapor according to claim 2 strengthens coal bed gas pumping method, feature exists
It is all vertical drilling in: vapor injection hole described in step 1 and coal bed gas extraction borehole, boring radius is 50~
180mm, hole depth are 40~150mm, and the spacing of adjacent two drilling is 1~2.5m.
5. coal bed drilling note high pressure-temperature vapor according to claim 2 strengthens coal bed gas pumping method, feature exists
In: when filling the water steam into vapor injection hole, borehole gases pressure is controlled by 3 real-time monitoring numerical value of pressure sensor
In 1~2.5Mpa.
6. coal bed drilling note high pressure-temperature vapor according to claim 1 strengthens coal bed gas pumping method, feature exists
In: the extraction to mixed gas is quickly completed after to gas injection link, and coal bed gas extraction brill is maintained at during entire extraction
It is carried out under hot environment in hole more than 100 DEG C of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495290.6A CN109630081A (en) | 2018-12-07 | 2018-12-07 | A kind of coal bed drilling note high pressure-temperature vapor strengthens coal bed gas drainage device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495290.6A CN109630081A (en) | 2018-12-07 | 2018-12-07 | A kind of coal bed drilling note high pressure-temperature vapor strengthens coal bed gas drainage device and method |
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| CN109630081A true CN109630081A (en) | 2019-04-16 |
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| CN201811495290.6A Pending CN109630081A (en) | 2018-12-07 | 2018-12-07 | A kind of coal bed drilling note high pressure-temperature vapor strengthens coal bed gas drainage device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374566A (en) * | 2019-07-24 | 2019-10-25 | 河南理工大学 | A kind of pumping method that ultrasound combines fracturing coal seam with high steam, desorbs gas |
| CN110886594A (en) * | 2019-12-17 | 2020-03-17 | 中国煤炭地质总局勘查研究总院 | Method for exploiting coal bed gas |
| CN111188620A (en) * | 2020-01-13 | 2020-05-22 | 西南交通大学 | High-ground-temperature tunnel rock burst prevention and treatment device |
| CN113605868A (en) * | 2021-08-30 | 2021-11-05 | 中国煤炭地质总局广东煤炭地质局勘查院 | Coal bed gas well production increase gas injection displacement system and working method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418679A (en) * | 2008-11-12 | 2009-04-29 | 太原理工大学 | Method for pumping coalbed gas by heating coal bed |
| CN101832149A (en) * | 2010-05-20 | 2010-09-15 | 太原理工大学 | Method for extracting coal seam gas by underground heat injection |
| CN207229083U (en) * | 2017-09-30 | 2018-04-13 | 太原理工大学 | A kind of device of underground heat injection transformation coal seam physical characteristic |
-
2018
- 2018-12-07 CN CN201811495290.6A patent/CN109630081A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418679A (en) * | 2008-11-12 | 2009-04-29 | 太原理工大学 | Method for pumping coalbed gas by heating coal bed |
| CN101832149A (en) * | 2010-05-20 | 2010-09-15 | 太原理工大学 | Method for extracting coal seam gas by underground heat injection |
| CN207229083U (en) * | 2017-09-30 | 2018-04-13 | 太原理工大学 | A kind of device of underground heat injection transformation coal seam physical characteristic |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374566A (en) * | 2019-07-24 | 2019-10-25 | 河南理工大学 | A kind of pumping method that ultrasound combines fracturing coal seam with high steam, desorbs gas |
| CN110886594A (en) * | 2019-12-17 | 2020-03-17 | 中国煤炭地质总局勘查研究总院 | Method for exploiting coal bed gas |
| CN110886594B (en) * | 2019-12-17 | 2022-04-01 | 中国煤炭地质总局勘查研究总院 | Method for exploiting coal bed gas |
| CN111188620A (en) * | 2020-01-13 | 2020-05-22 | 西南交通大学 | High-ground-temperature tunnel rock burst prevention and treatment device |
| CN113605868A (en) * | 2021-08-30 | 2021-11-05 | 中国煤炭地质总局广东煤炭地质局勘查院 | Coal bed gas well production increase gas injection displacement system and working method thereof |
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Application publication date: 20190416 |
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