CN113445970A - Ground production increase auxiliary device of coal bed gas single well tolerance - Google Patents
Ground production increase auxiliary device of coal bed gas single well tolerance Download PDFInfo
- Publication number
- CN113445970A CN113445970A CN202110959405.8A CN202110959405A CN113445970A CN 113445970 A CN113445970 A CN 113445970A CN 202110959405 A CN202110959405 A CN 202110959405A CN 113445970 A CN113445970 A CN 113445970A
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- Prior art keywords
- gas
- coal bed
- oil pipe
- gas production
- sleeve
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 57
- 239000003245 coal Substances 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 68
- 238000003795 desorption Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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
- E21B34/00—Valve arrangements for boreholes or wells
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B43/34—Arrangements for separating materials produced by the well
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- 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)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a ground production increase auxiliary device for coal bed gas single well gas quantity, which comprises a sleeve extending to the lower side of a underground coal bed, wherein an oil pipe is sleeved on the inner side of the sleeve, a well bottom pocket is arranged between the inner bottom of the sleeve and the oil pipe, the lower end of the oil pipe is connected with a plug through a sieve pipe, a water suction pump is arranged at the inner bottom of the oil pipe, a sucker rod is sleeved on the inner side of the oil pipe, a gas production channel is arranged at the right side of the upper end of the sleeve, the gas production channel is connected with a gas production main pipeline and a gas production auxiliary pipeline through a three-way pipe, and a main pipeline valve and an auxiliary pipeline valve are respectively arranged on the gas production main pipeline and the gas production auxiliary pipeline. Compared with the prior art, the method has the advantages that: compared with the traditional coal bed methane mining method, the method has the advantages that the characteristics of a speed sensitive effect, a water sensitive effect and the like can not be formed, the pressure on the surface of the coal bed pore matrix can be reduced, the coal bed methane can be quickly desorbed, the gas yield of the coal bed gas well is improved, and meanwhile, the abandoned coal bed gas well can be coiled.
Description
Technical Field
The invention relates to the technical field of ground coal bed gas exploitation, in particular to a ground production increase auxiliary device for coal bed gas single well gas quantity.
Background
The coal bed gas is unconventional energy associated with coal, has high calorific value and is clean, and is a key field of unconventional natural gas resource exploration and development. At present, the development of coal bed gas mainly takes ground drainage and mining as main parts, methane gas attached to pores of a coal bed is desorbed through drainage and depressurization, and the effect of gas production is achieved. However, the adoption of the drainage and production depressurization mode often forms the characteristics of a speed sensitive effect, a water sensitive effect and the like, so that the coal bed methane cannot be effectively desorbed, and the gas production rate of most coal bed methane production wells can be seen to be lower in the existing drainage and production wells, so that the requirement of industrial gas flow of 800m3/d cannot be met.
Because the gas production rate of the coal-bed gas well is low, the coal-bed gas well which can not reach the industrial gas flow is treated by adopting a abandoning method, and the problem of great resource waste exists.
Disclosure of Invention
The invention aims to solve the technical problems and provide a ground production increase auxiliary device for coal bed gas single well gas quantity, which can not form the characteristics of quick response effect, water sensitivity effect and the like and can increase the yield of a coal bed gas production well.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a ground of coal bed gas individual well tolerance increases output auxiliary device, is including extending to the sleeve pipe of underground coal seam downside, the inboard cover of sleeve pipe is equipped with oil pipe and is provided with the shaft bottom pocket between bottom and the oil pipe in and, the oil pipe lower extreme is connected with the plug through the screen pipe, and the bottom is provided with the suction pump in the oil pipe, and the inboard cover of oil pipe is equipped with the sucker rod, sleeve pipe upper end right side is provided with the product gas passageway, the product gas passageway is connected with gas production main line and gas production auxiliary line through the three-way pipe, be provided with main line valve and auxiliary line valve respectively on gas production main line and the gas production auxiliary line, the gas outlet end of gas production auxiliary line is connected with the right part of gas production main line, has from left to right set gradually negative pressure sampling device and gas-water separator on the gas production auxiliary line, the tip is provided with gas flowmeter behind the gas production main line.
The upper end of the oil pipe extends to the outer side of the sleeve and the right side of the upper end of the oil pipe is provided with a stratum drainage channel, and the stratum drainage channel is connected with a water outlet of the water suction pump through a water delivery hose.
And a sleeve pressure gauge and an underground pressure gauge cable channel are arranged on the left side of the upper end of the sleeve. And the cable is used for leading in the connecting pressure gauge and the underground pressure gauge.
And a main pipeline valve is arranged on the gas production main pipeline on the right side of the gas flowmeter, and a gas gathering and transporting or emptying pipeline interface is arranged at the tail end of the gas production main pipeline.
Compared with the prior art, the invention has the advantages that: compared with the traditional coal bed methane mining method, the method has the advantages that the characteristics of a speed sensitive effect, a water sensitive effect and the like can not be formed, the pressure on the surface of the coal bed pore matrix can be reduced, the coal bed methane can be quickly desorbed, the gas yield of the coal bed gas well is improved, and meanwhile, the abandoned coal bed gas well can be coiled.
Drawings
FIG. 1 is a schematic structural diagram of a ground stimulation auxiliary device for coal bed methane single well gas volume according to the present invention.
As shown in the figure: 1. a sucker rod; 2. a formation drainage channel; 3. a gas production channel; 4. a cable channel of the sleeve pressure gauge and the underground pressure gauge; 5. a gas production auxiliary pipeline; 6. a three-way pipe; 7. a negative pressure sampling device; 8. a gas production main pipeline; 9. a gas-water separator; 10. a gas flow meter; 11. a gas gathering or emptying pipeline interface; 12. an oil pipe; 13. a sleeve; 14. a coal seam; 15. a water pump; 16. a screen pipe; 17. plugging with a thread; 18. a well bottom pocket.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.
The present invention will be described in further detail with reference to the accompanying drawings.
A ground production-increasing auxiliary device for coal bed gas single well gas quantity comprises a casing 13 extending to the lower side of an underground coal bed 14, an oil pipe 12 is sleeved on the inner side of the casing 13, a well bottom pocket 18 is arranged between the inner bottom of the casing and the oil pipe 12, the lower end of the oil pipe 12 is connected with a plug 17 through a sieve pipe 16, the bottom in the oil pipe 12 is provided with a water pump 15, the inner side of the oil pipe 12 is sleeved with a sucker rod 1, the right side of the upper end of the sleeve 13 is provided with a gas production channel 3, the gas production channel 3 is connected with a gas production main pipeline 8 and a gas production auxiliary pipeline 5 through a three-way pipe 6, a main pipeline valve and an auxiliary pipeline valve are respectively arranged on the gas production main pipeline 8 and the gas production auxiliary pipeline 5, the gas production auxiliary pipeline 5 is provided with a gas outlet end connected with the right part of the gas production main pipeline 8, the gas production auxiliary pipeline 5 is sequentially provided with a negative pressure sampling device 7 and a gas-water separator 9 from left to right, and the rear end part of the gas production main pipeline 8 is provided with a gas flowmeter 10.
Wherein, the upper end of the oil pipe 12 extends to the outer side of the sleeve 13, the right side of the upper end part is provided with a stratum drainage channel 2, and the stratum drainage channel 2 is connected with the water outlet of the water pump 15 through a water delivery hose. And a sleeve pressure gauge and a downhole pressure gauge cable channel 4 are arranged on the left side of the upper end of the sleeve 13. A main pipeline valve is arranged on the gas production main pipeline 8 on the right side of the gas flowmeter 10, and a gas gathering and transporting or emptying pipeline interface 11 is arranged at the tail end of the gas production main pipeline 8.
In the specific implementation of the invention, the negative pressure extraction device 7 provides external kinetic energy for desorption of coal bed methane, namely the negative pressure sampling device 7 can form a certain negative pressure at the mouth of the coal bed gas well, the negative pressure is conducted to the surface of the coal bed pore matrix from the annular space between the underground oil pipe 12 and the sleeve 13, gas on the surface of the coal bed pore matrix is stripped firstly, then residual adsorbed gas in the coal bed is desorbed in an accelerated manner under the action of stress difference and concentration difference, then the methane desorption area is enlarged continuously, the gas-water separator 9 is used for removing moisture in the gas, and finally the gas flowmeter 10 measures the gas yield of the coal bed gas well in real time.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides a ground production increase auxiliary device of coal bed gas individual well tolerance which characterized in that: comprises a sleeve (13) extending to the lower side of an underground coal seam (14), wherein an oil pipe (12) is sleeved on the inner side of the sleeve (13), a well bottom pocket (18) is arranged between the inner bottom of the sleeve (13) and the oil pipe (12), the lower end of the oil pipe (12) is connected with a plug (17) through a sieve pipe (16), a water suction pump (15) is arranged at the inner bottom of the oil pipe (12), a sucker rod (1) is sleeved on the inner side of the oil pipe (12), a gas production channel (3) is arranged on the right side of the upper end of the sleeve (13), the gas production channel (3) is connected with a gas production main pipeline (8) and a gas production auxiliary pipeline (5) through a three-way pipe (6), a main pipeline valve and an auxiliary pipeline valve are respectively arranged on the gas production main pipeline (8) and the gas production auxiliary pipeline (5), the gas production auxiliary pipeline (5) is sequentially provided with a negative pressure sampling device (7) and a gas-water separator (9) from left to right, and a gas flowmeter (10) is arranged at the rear end part of the gas production main pipeline (8).
2. The ground production increase auxiliary device for the coal bed gas single well gas volume according to claim 1, characterized in that: the upper end of the oil pipe (12) extends to the outer side of the casing pipe (13), a stratum drainage channel (2) is arranged on the right side of the upper end of the oil pipe, and the stratum drainage channel (2) is connected with a water outlet of the water suction pump (15) through a water delivery hose.
3. The ground production increase auxiliary device for the coal bed gas single well gas volume according to claim 1, characterized in that: and a sleeve pressure gauge and an underground pressure gauge cable channel (4) are arranged on the left side of the upper end of the sleeve (13).
4. The ground production increase auxiliary device for the coal bed gas single well gas volume according to claim 1, characterized in that: the gas production main pipeline (8) on the right side of the gas flowmeter (10) is provided with a main pipeline valve, and the tail end of the gas production main pipeline (8) is provided with a gas gathering and transporting or emptying pipeline interface (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110959405.8A CN113445970A (en) | 2021-08-20 | 2021-08-20 | Ground production increase auxiliary device of coal bed gas single well tolerance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110959405.8A CN113445970A (en) | 2021-08-20 | 2021-08-20 | Ground production increase auxiliary device of coal bed gas single well tolerance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113445970A true CN113445970A (en) | 2021-09-28 |
Family
ID=77818787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110959405.8A Withdrawn CN113445970A (en) | 2021-08-20 | 2021-08-20 | Ground production increase auxiliary device of coal bed gas single well tolerance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113445970A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445402A (en) * | 2022-09-14 | 2022-12-09 | 合肥万豪能源设备有限责任公司 | Coal bed gas drying system applied to conveying pipeline |
-
2021
- 2021-08-20 CN CN202110959405.8A patent/CN113445970A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445402A (en) * | 2022-09-14 | 2022-12-09 | 合肥万豪能源设备有限责任公司 | Coal bed gas drying system applied to conveying pipeline |
| CN115445402B (en) * | 2022-09-14 | 2023-08-11 | 合肥万豪能源设备有限责任公司 | Coal bed gas drying system applied to conveying pipeline |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210928 |
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| WW01 | Invention patent application withdrawn after publication |