CN108868697A - A kind of method of coal-bed gas exploitation - Google Patents
A kind of method of coal-bed gas exploitation Download PDFInfo
- Publication number
- CN108868697A CN108868697A CN201810546699.XA CN201810546699A CN108868697A CN 108868697 A CN108868697 A CN 108868697A CN 201810546699 A CN201810546699 A CN 201810546699A CN 108868697 A CN108868697 A CN 108868697A
- Authority
- CN
- China
- Prior art keywords
- bed gas
- coal
- coal bed
- well
- gas well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 238000005538 encapsulation Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000003795 desorption Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 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
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of methods of coal-bed gas exploitation, include the following steps：Step（1）：Hydraulic fracturing is carried out to coal bed gas well；Step（2）：By the water body extraction in coal bed gas well；Step（3）：300 DEG C -400 DEG C of gas is passed through in coal bed gas well, coal bed gas well is then closed, carries out bored well operation；Step（4）：Coal bed gas well is connected, drainage tube is accessed into coal bed gas well, and processing will be sealed between drainage tube and the coal bed gas borehole wall.The present invention can be improved the production efficiency of coal bed gas.
Description
Technical field
The invention belongs to Coal-seam Gas Recovery Technologies fields, and in particular to a kind of method of coal-bed gas exploitation.
Background technique
Coal bed gas is commonly called as " gas ", it, which refers to, is stored in coal seam using methane as main component, to be adsorbed on matrix of coal
Based on grain surface, the hydrocarbon gas that is partially free in coal hole or is dissolved in coal seam water, be the associated minerals resource of coal, belong to
Unconventional gas.Since coal bed gas is mainly present in coal seam with adsorbed state, in exploitation, coal bed gas first will be from coal seam
Then desorption is permeated from coal bed gas well in the gap of coal seam by extraction.The exploitation production operation efficiency also phase of coal bed gas at present
To lower, it is necessary to design a kind of development approach of efficient coal bed gas.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of coal-bed gas exploitation, can be improved the production efficiency of coal bed gas.
To achieve the above object, the present invention provides the following technical solutions：
A kind of method of coal-bed gas exploitation, includes the following steps：
Step（1）：Hydraulic fracturing is carried out to coal bed gas well；
Step（2）：By the water body extraction in coal bed gas well；
Step（3）：300 DEG C -400 DEG C of gas is passed through in coal bed gas well, coal bed gas well is then closed, carries out bored well operation；
Step（4）：Connect coal bed gas well, access drainage tube into coal bed gas well, and by between drainage tube and the coal bed gas borehole wall into
Row encapsulation process.
Preferably, the step（1）In segmentation hydraulic fracturing is carried out to coal bed gas well.
Preferably, the step（3）When the bored well of middle coal bed gas well, the air pressure in coal bed gas well is higher than normal atmospheric pressure.
The beneficial effects of the invention are as follows：Hydraulic fracturing first is carried out to coal bed gas well, so that the coal bed gas well borehole wall generates crack,
Hydraulic fracturing is safe and efficient, then extracts the water body in coal bed gas well, makes main Enriching Coalbed Methane section exposure, passes through
High temperature and high pressure gas carries out desorption processing to the coal bed gas well borehole wall, so that the coal bed gas being adsorbed on coal seam accelerates desorption, and
It is discharged from the crack of the borehole wall.The desorption coal bed gas in coal bed gas well can be extracted and be collected by drainage tube, it is entire to grasp
It is very efficient to deal with process.
Specific embodiment
In order to make content of the present invention easily facilitate understanding, With reference to embodiment to of the present invention
Technical solution is described further, but the present invention is not limited only to this.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of method of coal-bed gas exploitation, includes the following steps：
Step（1）：Hydraulic fracturing is carried out to coal bed gas well；
Step（2）：By the water body extraction in coal bed gas well；
Step（3）：300 DEG C -400 DEG C of gas is passed through in coal bed gas well, coal bed gas well is then closed, carries out bored well operation；
Step（4）：Connect coal bed gas well, access drainage tube into coal bed gas well, and by between drainage tube and the coal bed gas borehole wall into
Row encapsulation process.
Preferably, the step（1）In segmentation hydraulic fracturing is carried out to coal bed gas well.
Preferably, the step（3）When the bored well of middle coal bed gas well, the air pressure in coal bed gas well is higher than normal atmospheric pressure.
Because permeability of the gas between coal seam can be improved in 400 DEG C of temperature, accelerate the dissociation rate of coal bed gas, the present invention
After coal bed gas well frac treatment, coal bed gas parsing desorption is accelerated using high-temperature gas, the production efficiency of coal bed gas will obtain bright
It is aobvious to be promoted.
Claims (3)
1. a kind of method of coal-bed gas exploitation, which is characterized in that include the following steps：
Step（1）：Hydraulic fracturing is carried out to coal bed gas well；
Step（2）：By the water body extraction in coal bed gas well；
Step（3）：300 DEG C -400 DEG C of gas is passed through in coal bed gas well, coal bed gas well is then closed, carries out bored well operation；
Step（4）：Connect coal bed gas well, access drainage tube into coal bed gas well, and by between drainage tube and the coal bed gas borehole wall into
Row encapsulation process.
2. a kind of method of coal-bed gas exploitation according to claim 1, which is characterized in that the step（1）In to coal seam
Gas well carries out segmentation hydraulic fracturing.
3. a kind of method of coal-bed gas exploitation according to claim 1, which is characterized in that the step（3）Middle coal bed gas
When the bored well of well, the air pressure in coal bed gas well is higher than normal atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810546699.XA CN108868697A (en) | 2018-05-31 | 2018-05-31 | A kind of method of coal-bed gas exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810546699.XA CN108868697A (en) | 2018-05-31 | 2018-05-31 | A kind of method of coal-bed gas exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108868697A true CN108868697A (en) | 2018-11-23 |
Family
ID=64335860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810546699.XA Withdrawn CN108868697A (en) | 2018-05-31 | 2018-05-31 | A kind of method of coal-bed gas exploitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108868697A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566172A (en) * | 2019-08-15 | 2019-12-13 | 太原理工大学 | method for fracturing coal bed by using flue gas of high-pressure thermal power plant |
-
2018
- 2018-05-31 CN CN201810546699.XA patent/CN108868697A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566172A (en) * | 2019-08-15 | 2019-12-13 | 太原理工大学 | method for fracturing coal bed by using flue gas of high-pressure thermal power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181123 |