CN109653787A - A kind of high artesian high gas layer group coordination pumping and mining pressure relief method - Google Patents
A kind of high artesian high gas layer group coordination pumping and mining pressure relief method Download PDFInfo
- Publication number
- CN109653787A CN109653787A CN201910072920.7A CN201910072920A CN109653787A CN 109653787 A CN109653787 A CN 109653787A CN 201910072920 A CN201910072920 A CN 201910072920A CN 109653787 A CN109653787 A CN 109653787A
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- coal seam
- drilling
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- water
- extraction
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 238000005086 pumping Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 103
- 238000005553 drilling Methods 0.000 claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000000605 extraction Methods 0.000 claims abstract description 50
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001572175 Gaza Species 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Pipeline Systems (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of high artesian high gas layer groups to coordinate pumping and mining pressure relief method, it is by opening up a vertical drilling, and the coal bed drilling for being connected to each coal seam is opened up in vertical drilling, the pressure break that high pressure water realizes coal seam is injected into vertical drilling and coal bed drilling, after coal bed fracturing, extraction high pressure water, hydrophobic drilling connection vertical drilling and water-bearing layer are set again, extraction general pipeline is arranged in vertical drilling, gas drainage branch pipe is arranged in coal bed drilling, hydrophobic branch pipe is arranged in hydrophobic drilling, and install corresponding valve, the storage water in gas and water-bearing layer is detached in order, to realize " one hole and one pipe is multi-purpose " draining coal seam gas and high artesian, it is simple with operational procedure, it is at low cost, and extraction, unrestrained high-efficient advantage.
Description
Technical field
Coordinate extraction the present invention relates to coal mining technology field more particularly to a kind of high artesian high gas layer group to unload
Pressure method.
Background technique
East China mining area coal measure strata is mostly coal seam group condition, and coal-bed gas pressure is high and is often accompanied by water-bearing layer, is exploited
Difficulty is very big, and to prevent the accidents such as gas, water damage, safe working needs first coal seam to implement drilling in seam mining previous aspect,
Firedamp drainage；On the other hand also to implement drilling to water-bearing layer to discharge water, current pumping and mining pressure relief and the unrestrained measure construction journey of draining
Sequence is complicated, higher cost, and extraction, unrestrained inefficiency.
Summary of the invention
The present invention provides a kind of high artesian high gas layer groups to coordinate pumping and mining pressure relief method, and operational procedure can be made simple
It is single, cost is reduced, and improve extraction and unrestrained efficiency.
The present invention provides a kind of high artesian high gas layer groups to coordinate pumping and mining pressure relief method comprising:
The distribution situation of detection of coal seam and the preservation situation in each coal seam and water-bearing layer；
Implement vertical drilling through each coal seam until in bottom coal seam from ground, and runs through each coal seam position
Towards opening up corresponding coal bed drilling in each coal seam on the hole wall of the vertical drilling；
Extraction general pipeline is arranged in the vertical drilling, arrangement and the extraction general pipeline phase in each coal bed drilling
Gas drainage branch pipe even, injects high pressure into the coal bed drilling by the extraction general pipeline and the gas drainage branch pipe
Water carries out frac treatment to each coal seam, detaches the high pressure water after each coal seam is by pressure break；
After the high pressure water is pulled out, the drainage hole for being connected to the water-bearing layer is opened up from the vertical drilling；
Arrange that the hydrophobic branch pipe being connected with the extraction general pipeline, the extraction general pipeline are equipped with total valve, institute in the drainage hole
Gas drainage branch pipe is stated equipped with gas drainage valve, the hydrophobic branch pipe is equipped with hydrophobic valve；
The extraction equipment that is connected with the extraction general pipeline is set outside the vertical drilling, and start the extraction equipment,
The total valve and the gas drainage valve are opened, gas is carried out to each coal seam and is detached；
When gas density in coal seam is down to safe range, the gas drainage valve is closed, the drain valve is opened
Storage water in door extraction water-bearing layer.
Further, the coal bed drilling is at being radially distributed in each coal seam.
Further, execute it is described to each coal seam carry out frac treatment step while the method also includes:
Suitable proppant and gaza's amount are selected according to the characteristic attribute in each coal seam.
Further, the drainage hole is to open up from the vertical drilling towards inclination angled in the water-bearing layer
Hole body.
Further, the total valve, the gas drainage valve and the hydrophobic valve are single by outside control
The electronic valve that member is uniformly controlled.
The embodiment of the present invention opens up the coal for being connected to each coal seam by opening up a vertical drilling in vertical drilling
The pressure break that high pressure water realizes coal seam is injected in layer drilling into vertical drilling and coal bed drilling, after coal bed fracturing, extraction high pressure
Water, then hydrophobic drilling connection vertical drilling and water-bearing layer is arranged is arranged extraction general pipeline in vertical drilling, is arranged in coal bed drilling
Gas drainage branch pipe arranges hydrophobic branch pipe in hydrophobic drilling, and installs corresponding valve, detaches gas and water-bearing layer in order
Storage water, " one hole and one pipe is multi-purpose " draining coal seam gas and high artesian, have operational procedure simple, cost to realize
It is low, and extraction, unrestrained high-efficient advantage.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is that a kind of high artesian high gas layer group that the embodiment of the present invention one provides coordinates showing for pumping and mining pressure relief method
Meaning flow chart；
Fig. 2 is the reality that a kind of high artesian high gas layer group that the embodiment of the present invention one provides coordinates pumping and mining pressure relief method
Existing structural schematic diagram；
Fig. 3 is that a kind of high artesian high gas layer group that the embodiment of the present invention one provides coordinates the every of pumping and mining pressure relief method
Gas drainage branch pipe fit structure schematic diagram in a coal seam.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that mesh of the term used in this description of the invention merely for the sake of description specific embodiment
And be not intended to limit the present invention.As description of the invention and it is used in the attached claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
It is that a kind of high artesian high gas layer group that the embodiment of the present invention one provides coordinates pumping and mining pressure relief side referring to Fig. 1
The schematic flow diagram of method comprising following steps S101~S106:
Step S101: the distribution situation of detection of coal seam and the preservation situation in each coal seam and water-bearing layer.
Step S102: implement vertical drilling through each coal seam until in bottom coal seam from ground, and through each
Towards opening up corresponding coal bed drilling in each coal seam on the hole wall of the vertical drilling of coal seam position.
Step S103: extraction general pipeline is arranged in vertical drilling, arranges in each coal bed drilling and is connected with extraction general pipeline
Gas drainage branch pipe, high pressure water is injected into coal bed drilling by extraction general pipeline and gas drainage branch pipe, to each coal seam into
Row frac treatment detaches high pressure water after each coal seam is by pressure break.
Step S104: after high pressure water is pulled out, the drainage hole for being connected to water-bearing layer is opened up from vertical drilling, is being arranged
Arrange that the hydrophobic branch pipe being connected with extraction general pipeline, extraction general pipeline are equipped with total valve in water drilling hole, gas drainage branch pipe is equipped with
Gas drainage valve, hydrophobic branch pipe are equipped with hydrophobic valve.
Step S105: being arranged the extraction equipment being connected with extraction general pipeline outside vertical drilling, and starts extraction equipment, opens
Total valve and gas drainage valve carry out gas to each coal seam and detach.
Step S106: when gas density in coal seam is down to safe range, closed gas extraction valve opens described dredge
Storage water in penstock extraction water-bearing layer.
Specifically, referring to fig. 2, by taking three layers of coal seam as an example (coal seam 1, coal seam 2 and coal seam 3 in such as figure), detection of coal seam 1,
The preservation situation in coal seam 2, coal seam 3 and water-bearing layer 4；Implement vertical drilling 6 from ground 5, passes through coal seam 1, coal seam 2 and reach coal seam 3；
Implement coal bed drilling 7 in 3 coal seam of coal seam 1, coal seam 2 and coal seam；High pressure water is injected to vertical drilling 6 and coal bed drilling 7, is utilized
High pressure water pressure break coal seam 1, coal seam 2 reach coal seam 3, generate coal seam fracture 16, improve the gas permeability in coal seam；Extraction vertical drilling 6
And the high pressure water in coal bed drilling 7；Drainage hole 8 is played from vertical drilling 6, reaches water-bearing layer 4；It arranges and takes out in vertical drilling 6
Put main pipe rail 9；Gas drainage bye-pass 10 is arranged in coal bed drilling 7；Hydrophobic branch pipe(tube) 11 is arranged in drainage hole 8；Peace
Fill total valve 12, gas drainage valve 13, hydrophobic valve 14；Extraction equipment 15 is disposed about in vertical drilling 6；Starting extraction is set
Standby 15, open total valve 12, gas drainage valve 13,3 coal-bed gas of extraction coal seam 1, coal seam 2 and coal seam；Closed gas extraction
Valve 13 opens hydrophobic valve 14, the high pressure water in extraction water-bearing layer 4.It in the concrete realization, can such as opening vertical drilling 6
If diameter is set as making it meet the extraction demand of one hole and one pipe not less than 150mm, extraction efficiency is improved.
Specifically, by opening up a vertical drilling, and the coal seam drilling for being connected to each coal seam is opened up in vertical drilling
The pressure break that high pressure water realizes coal seam is injected in hole into vertical drilling and coal bed drilling, after coal bed fracturing, extraction high pressure water, then
Hydrophobic drilling connection vertical drilling and water-bearing layer are set, extraction general pipeline is arranged in vertical drilling, arranges gas in coal bed drilling
Extraction branch pipe arranges hydrophobic branch pipe in hydrophobic drilling, and installs corresponding valve, detaches depositing for gas and water-bearing layer in order
Water storage has operational procedure simple to realize " one hole and one pipe is multi-purpose " draining coal seam gas and high artesian, at low cost, and
Extraction, unrestrained high-efficient advantage.
Referring to Fig. 3, further, coal bed drilling 7 is at being radially distributed in each coal seam.
Specifically, coal bed drilling 7 is opened up at radial in each coal seam, it is ensured that the pressure break in each coal seam is uniformly and coal
Layer gas drainage under suction is thorough.
Referring to fig. 2, further, drainage hole 8 is to open up from vertical drilling 6 towards inclination angled in water-bearing layer 4
Hole body.
It specifically, can be to water-bearing layer 4 by using inclined drill because the storage water in water-bearing layer 4 has certain pressure
Interior storage water generates certain buffer function, it is ensured that the safety of drilling construction.
Further, total valve 12, gas drainage valve 13 and hydrophobic valve 14 are unified by external control unit outside
The electronic valve of control.
Specifically, total valve 12, gas drainage valve 13 and hydrophobic valve 14 are electronic valve, single by outside control
Member is uniformly controlled opening and closing, so that coherent in time controls each pipeline, improves extraction working efficiency.
In embodiment provided herein, it should be understood that disclosed content only schematically can be with
It realizes by another way.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (4)
1. a kind of high artesian high gas layer group coordinates pumping and mining pressure relief method characterized by comprising
The distribution situation of detection of coal seam and the preservation situation in each coal seam and water-bearing layer；
Implement vertical drilling through each coal seam until in bottom coal seam from ground, and is running through described in each coal seam position
Towards opening up corresponding coal bed drilling in each coal seam on the hole wall of vertical drilling；
Extraction general pipeline is arranged in the vertical drilling, arrangement is connected with the extraction general pipeline in each coal bed drilling
Gas drainage branch pipe injects high pressure water into the coal bed drilling by the extraction general pipeline and the gas drainage branch pipe, right
Each coal seam carries out frac treatment, detaches the high pressure water after each coal seam is by pressure break；
After the high pressure water is pulled out, the drainage hole for being connected to the water-bearing layer is opened up from the vertical drilling, in institute
Stating the hydrophobic branch pipe that arrangement is connected with the extraction general pipeline in drainage hole, the extraction general pipeline is equipped with total valve, and described watt
This extraction branch pipe is equipped with gas drainage valve, and the hydrophobic branch pipe is equipped with hydrophobic valve；
The extraction equipment being connected with the extraction general pipeline is set outside the vertical drilling, and starts the extraction equipment, opening
The total valve and the gas drainage valve carry out gas to each coal seam and detach；
When gas density in coal seam is down to safe range, the gas drainage valve is closed, the hydrophobic valve is opened and takes out
Put the storage water in water-bearing layer.
2. high artesian high gas layer group according to claim 1 coordinates pumping and mining pressure relief method, which is characterized in that described
Coal bed drilling is at being radially distributed in each coal seam.
3. high artesian high gas layer group according to claim 1 coordinates pumping and mining pressure relief method, which is characterized in that described
Drainage hole is to tilt the hole body opened up from the vertical drilling towards angled in the water-bearing layer.
4. high artesian high gas layer group according to claim 1 coordinates pumping and mining pressure relief method, which is characterized in that described
Total valve, the gas drainage valve and the hydrophobic valve are the electronic valve being uniformly controlled by external control unit outside.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910072920.7A CN109653787B (en) | 2019-01-25 | 2019-01-25 | Coordinated extraction pressure relief method for high-pressure-bearing water and high-gas coal seam group |
| PCT/CN2019/096402 WO2020151207A1 (en) | 2019-01-25 | 2019-07-17 | Coordinative extraction and pressure relief method for high confined water high gas coal seam group |
| ZA2020/00363A ZA202000363B (en) | 2019-01-25 | 2020-01-20 | Method for coordinate extraction and pressure relief of high-pressure water and high-gas coal seam groups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910072920.7A CN109653787B (en) | 2019-01-25 | 2019-01-25 | Coordinated extraction pressure relief method for high-pressure-bearing water and high-gas coal seam group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109653787A true CN109653787A (en) | 2019-04-19 |
| CN109653787B CN109653787B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910072920.7A Active CN109653787B (en) | 2019-01-25 | 2019-01-25 | Coordinated extraction pressure relief method for high-pressure-bearing water and high-gas coal seam group |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN109653787B (en) |
| WO (1) | WO2020151207A1 (en) |
| ZA (1) | ZA202000363B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020151207A1 (en) * | 2019-01-25 | 2020-07-30 | 安徽理工大学 | Coordinative extraction and pressure relief method for high confined water high gas coal seam group |
| CN113107583A (en) * | 2021-05-21 | 2021-07-13 | 中国矿业大学 | Thick and hard roof high-gas coal seam gas extraction system and extraction method |
| CN113123720A (en) * | 2021-03-22 | 2021-07-16 | 中国煤炭地质总局水文地质局 | Construction process for treating grouting holes and simultaneously using grouting holes as gas extraction holes in water damage area of coal seam floor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114837646B (en) * | 2022-05-05 | 2023-11-24 | 中联煤层气国家工程研究中心有限责任公司 | Multilayer co-mining device for coal bed gas mining |
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| WO2020151207A1 (en) * | 2019-01-25 | 2020-07-30 | 安徽理工大学 | Coordinative extraction and pressure relief method for high confined water high gas coal seam group |
| CN113123720A (en) * | 2021-03-22 | 2021-07-16 | 中国煤炭地质总局水文地质局 | Construction process for treating grouting holes and simultaneously using grouting holes as gas extraction holes in water damage area of coal seam floor |
| CN113107583A (en) * | 2021-05-21 | 2021-07-13 | 中国矿业大学 | Thick and hard roof high-gas coal seam gas extraction system and extraction method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020151207A1 (en) | 2020-07-30 |
| ZA202000363B (en) | 2020-12-23 |
| CN109653787B (en) | 2024-05-03 |
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