CN109519157A - Heat yield-increasing technique in coal bed gas well underground - Google Patents
Heat yield-increasing technique in coal bed gas well underground Download PDFInfo
- Publication number
- CN109519157A CN109519157A CN201811145245.8A CN201811145245A CN109519157A CN 109519157 A CN109519157 A CN 109519157A CN 201811145245 A CN201811145245 A CN 201811145245A CN 109519157 A CN109519157 A CN 109519157A
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- CN
- China
- Prior art keywords
- bed gas
- coal bed
- coal
- gas well
- high temperature
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The present invention relates to coal bed gas well mining technology fields, for the volume increase for realizing coal bed gas well head, the invention proposes a kind of coal bed gas well undergrounds to heat yield-increasing technique, be by the annular space of existing coal bed gas well oil pipe and casing one bottom of tripping in be high temperature resistant glass fibre reinforced plastic screen casing, top be annular space steel pipe composition structure, the annular space steel pipe on top is connect with wellhead sealing, it is high temperature-resistant cable in annular space steel pipe, it is heating rod in high temperature resistant glass fibre reinforced plastic screen casing, high temperature-resistant cable and heating rod connecting part are to be tightly connected；Heating rod is directly realized the water at coal bed gas well bottom after being powered and is heated, and around the heat diffusion to shaft bottom coal seam that the water in coal seam gradually releases heating rod, accelerates the coal bed gas parsing in coal seam reservoirs.The present invention is by directly changing bottom hole temperature (BHT) field to the heating of coal seam reservoirs；Improve the recovery ratio of coal bed gas；Accelerate the extraction of coal bed gas in coal seam；Shaft bottom water temperature increases the Brownian movement for increasing coal dust, improves coal dust indirectly and accumulates holddown well workover problem.
Description
Technical field
The present invention relates to coal bed gas well mining technology field, specially a kind of coal bed gas well underground heating volume increase work
Skill.
Background technique
China is one of coal bed gas resource country the most abundant.The exploitation of coal bed gas is not only to China's energy safeguard and coal
Mine is of great significance safely, and to energy resource structure is improved, clean energy resource development is promoted also to be of great significance.But from coal seam
From the point of view of gas industry development status, methane output and utilization long-run development are slow, do not go out to obtain essence by years development
Raising.The fundamental factor developed slowly be the geological conditions of China's complexity cause the production technique difficulty of coal bed gas compared with
Greatly, it is directed to the research theory achievement of forefathers, proposes a kind of method for increasing yield of coal bed gas with strong applicability.Specifically by straight
It connects and is heated in coal bed gas well underground to change the temperature field of coal seam reservoirs and increase the yield-increasing technique of methane output.
Summary of the invention
The purpose of the invention patent is: proposing a kind of coal bed gas well underground on the basis of existing theory only supports
Yield-increasing technique is heated, which can realize the volume increase of coal bed gas well head.
The present invention adopts the following technical scheme that;
A kind of coal bed gas well underground heating yield-increasing technique, is by the tripping in the annular space of existing coal bed gas well oil pipe and casing
The structure that one bottom is high temperature resistant glass fibre reinforced plastic screen casing, top is annular space steel pipe composition, the annular space steel pipe and wellhead sealing on top
Connection, is high temperature-resistant cable in annular space steel pipe, is heating rod, high temperature-resistant cable and heating rod in high temperature resistant glass fibre reinforced plastic screen casing
Connecting part is to be tightly connected；Heating rod directly realizes heating to the water at coal bed gas well bottom after being powered, and the water in coal seam will gradually add
Around the heat diffusion that hot pin releases to shaft bottom coal seam, accelerate the coal bed gas parsing in coal seam reservoirs.
The annular space steel pipe will be more than hydrodynamic face, and the interface of high temperature resistant glass fibre reinforced plastic screen casing and annular space steel pipe will be placed in hydrodynamic
It is more than face.
The interface of the high temperature-resistant cable and heating rod will be placed in hydrodynamic face or more.
It can reach following effect through the invention: bottom hole temperature (BHT) field changed by the heating directly to coal seam reservoirs；Improve coal
The recovery ratio of layer gas；Accelerate the extraction of coal bed gas in coal seam；Shaft bottom water temperature increases the Brownian movement for increasing coal dust, improves indirectly
Coal dust accumulates holddown well workover problem.The assembling of complete equipment device is simple, and technological operation is simple, has practical operability.Especially
It is the coal bed gas well that will affect suitable for down-hole mining.The assembling of complete equipment device is simple, and technological operation is simple, has and actually may be used
Operability.
Detailed description of the invention
Heat yield-increasing technique schematic diagram in Fig. 1 coal bed gas well shaft bottom；
In figure: polished rod (1), outlet pipeline (2), outlet pipe (3), cementing concrete (4), high temperature-resistant cable (5), annular space steel pipe
(6), high temperature resistant glass fibre reinforced plastic screen casing (7), heating rod (8), high temperature resistant glass fibre reinforced plastic screen casing underseal (9), coal seam (10), casing (11),
Oil pipe (12).
Specific embodiment
This modification scheme is to increase a part of device on the basis of existing coal bed gas well, and specific implementation method is as follows:
According to the annular space steel pipe and high temperature resistant glass fibre reinforced plastic screen casing of coal seam depth and coal seam thickness production corresponding length, in existing coal
One bottom of tripping in is high temperature resistant glass fibre reinforced plastic screen casing in the annular space of layer gas well oil pipe and casing, and top is the knot of annular space steel pipe composition
The annular space steel pipe of structure, top is connect with wellhead sealing, is high temperature-resistant cable in annular space steel pipe, is heating in glass reinforced plastic screen casing
Stick, high-temperature cable and heating rod connecting part are to be tightly connected.2, directly the water at coal bed gas well bottom is realized after heating rod is powered and is added
Heat around the heat diffusion to shaft bottom coal seam that the water in coal seam gradually releases heating rod, accelerates the coal bed gas in coal seam reservoirs
Parsing.
The present invention improves the recovery ratio of coal bed gas, accelerates coal by directly changing bottom hole temperature (BHT) field to the heating of coal seam reservoirs
The extraction of coal bed gas in layer, is the coal bed gas well that will affect especially suitable for down-hole mining, and water temperature raising in shaft bottom increases coal dust
Brownian movement, indirectly improve coal dust accumulate holddown well workover problem.The assembling of complete equipment device is simple, and technological operation is simple, tool
There is practical operability.
Although being described above in conjunction with preferred embodiment of the attached drawing to this patent, this patent is not limited to
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff, when not departing from this patent objective and scope of the claimed protection, may be used also under the enlightenment of this patent
By make it is many in the form of, these are belonged within the protection scope of this patent.
Claims (3)
1. yield-increasing technique is heated in a kind of coal bed gas well underground, which is characterized in that be by existing coal bed gas well oil pipe (12)
It is high temperature resistant glass fibre reinforced plastic screen casing (7) with one bottom of tripping in the annular space of casing (11), the knot that top is annular space steel pipe (6) composition
The annular space steel pipe (6) of structure, top is connect with wellhead sealing, is high temperature-resistant cable (5) in annular space steel pipe (6), in high temperature resistant glass
It is heating rod (8) in glass steel screen casing (7), high temperature-resistant cable (5) and heating rod (8) connecting part are to be tightly connected；Heating rod (8) is logical
Heating directly is realized to the water at coal bed gas well bottom after electricity, the heat diffusion that the water in coal seam gradually releases heating rod (8) is extremely
Around the coal seam of shaft bottom, accelerate the coal bed gas parsing in coal seam reservoirs.
2. yield-increasing technique is heated in coal bed gas well underground according to claim 1, which is characterized in that the annular space steel pipe (6)
Will be more than hydrodynamic face, the interface of high temperature resistant glass fibre reinforced plastic screen casing (7) and annular space steel pipe (6) will be placed in hydrodynamic face or more.
3. yield-increasing technique is heated in coal bed gas well underground according to claim 2, which is characterized in that the high temperature-resistant cable
(5) hydrodynamic face or more is placed in the interface of heating rod (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811145245.8A CN109519157A (en) | 2018-09-29 | 2018-09-29 | Heat yield-increasing technique in coal bed gas well underground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811145245.8A CN109519157A (en) | 2018-09-29 | 2018-09-29 | Heat yield-increasing technique in coal bed gas well underground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109519157A true CN109519157A (en) | 2019-03-26 |
Family
ID=65771502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811145245.8A Pending CN109519157A (en) | 2018-09-29 | 2018-09-29 | Heat yield-increasing technique in coal bed gas well underground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578508A (en) * | 2019-08-05 | 2019-12-17 | 邓惠荣 | Horizontal well one-well multi-mining combined coal bed gas mining and coal gasification method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456186A (en) * | 1981-03-09 | 1984-06-26 | Chisso Engineering Co. Ltd. | Electrically heated reactor for high temperature and pressure chemical reactions |
| US20020033253A1 (en) * | 2000-04-24 | 2002-03-21 | Rouffignac Eric Pierre De | In situ thermal processing of a hydrocarbon containing formation using insulated conductor heat sources |
| CN1508389A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN104912522A (en) * | 2015-05-11 | 2015-09-16 | 中国矿业大学 | Multi-hydraulic-fracturing-layer drainage and mining device for coal-bed gas well in high-stress region and multi-hydraulic-fracturing-layer drainage and mining process for coal-bed gas well in high-stress region |
| CN106884638A (en) * | 2017-04-14 | 2017-06-23 | 太原理工大学 | A kind of In Situ Heating method of coal bed gas heating exploitation |
| CN206860160U (en) * | 2017-06-26 | 2018-01-09 | 山西页岩气有限公司 | The gas yield-increasing apparatus of coal measures three |
| CN107701157A (en) * | 2017-09-30 | 2018-02-16 | 太原理工大学 | A kind of device and method of underground heat injection transformation coal seam physical characteristic |
-
2018
- 2018-09-29 CN CN201811145245.8A patent/CN109519157A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456186A (en) * | 1981-03-09 | 1984-06-26 | Chisso Engineering Co. Ltd. | Electrically heated reactor for high temperature and pressure chemical reactions |
| US20020033253A1 (en) * | 2000-04-24 | 2002-03-21 | Rouffignac Eric Pierre De | In situ thermal processing of a hydrocarbon containing formation using insulated conductor heat sources |
| CN1508389A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN104912522A (en) * | 2015-05-11 | 2015-09-16 | 中国矿业大学 | Multi-hydraulic-fracturing-layer drainage and mining device for coal-bed gas well in high-stress region and multi-hydraulic-fracturing-layer drainage and mining process for coal-bed gas well in high-stress region |
| CN106884638A (en) * | 2017-04-14 | 2017-06-23 | 太原理工大学 | A kind of In Situ Heating method of coal bed gas heating exploitation |
| CN206860160U (en) * | 2017-06-26 | 2018-01-09 | 山西页岩气有限公司 | The gas yield-increasing apparatus of coal measures three |
| CN107701157A (en) * | 2017-09-30 | 2018-02-16 | 太原理工大学 | A kind of device and method of underground heat injection transformation coal seam physical characteristic |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578508A (en) * | 2019-08-05 | 2019-12-17 | 邓惠荣 | Horizontal well one-well multi-mining combined coal bed gas mining and coal gasification method |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190326 |
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| RJ01 | Rejection of invention patent application after publication |