WO2016112759A1 - 一种钻孔内热驱替式强化抽采方法 - Google Patents
一种钻孔内热驱替式强化抽采方法 Download PDFInfo
- Publication number
- WO2016112759A1 WO2016112759A1 PCT/CN2015/096789 CN2015096789W WO2016112759A1 WO 2016112759 A1 WO2016112759 A1 WO 2016112759A1 CN 2015096789 W CN2015096789 W CN 2015096789W WO 2016112759 A1 WO2016112759 A1 WO 2016112759A1
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- Prior art keywords
- pipe
- heat
- borehole
- hole
- thermal
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000605 extraction Methods 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 22
- 238000005086 pumping Methods 0.000 claims description 10
- 239000011440 grout Substances 0.000 claims description 6
- 238000004868 gas analysis Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 abstract description 4
- 238000003795 desorption Methods 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 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
- 238000004880 explosion Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000243 solution 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
-
- 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
-
- 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
Definitions
- the invention relates to a thermal flooding enhanced drainage method in a borehole, and is particularly suitable for gas efficient extraction of a high gas and low permeability coal seam in a coal mine.
- the basic means of gas control in underground coal mines in China is the gas drainage measures based on the method of drilling gas drainage.
- the low permeability of coal seams has gradually become the main controlling factor for efficient gas drainage. Therefore, strengthening the anti-reflection has become a key technology to improve the gas drainage effect and achieve deep coal and gas co-production.
- intensive anti-reflection technologies There are mainly two types of intensive anti-reflection technologies mainly used.
- One is a method in which a fluid machine and a fluid medium are combined to treat a coal body, such as hydraulic slitting, hydraulic fracturing, etc., and the other is an explosive explosion method. Cause the coal body to crack.
- Both methods can increase the permeability of the coal seam and improve the gas drainage effect, but still have their own limitations.
- hydraulic cutting, hydraulic fracturing and other methods there will be water lock effect and other methods to suppress gas analysis;
- explosives and other methods there is costly charging, and the explosive itself is a dangerous source, and there is a certain safety for underground production. Threat. Therefore, it is necessary to find a safe and reliable, time-saving and labor-saving, simple and easy to implement and cost-effective strengthening measures, which is of great significance to improve mine gas drainage efficiency and prevent coal and gas outburst.
- the object of the present invention is to overcome the deficiencies in the prior art and to provide a method for intensive drilling and drainage in a borehole that is safe, reliable, time-saving, labor-saving, simple and inexpensive.
- the method for intensifying the excavation in the borehole of the present invention including through-drilling or bedding drilling, spacing a plurality of holes of the pumping holes in the coal seam; Sealing and paralleling into the gas extraction pipe network for gas drainage; the steps are as follows:
- multiple heat-displaced drill holes are arranged at intervals in a plurality of pumping boreholes, and the heat-displaced drill holes are alternately arranged with the drill holes;
- the thermal drive for the drill hole, exit the drill pipe, and then send the grouting pipe, the slurry return pipe, the heat pipe and the pumping pipe to the hot drive, and connect the exposed end of the grouting pipe with the grouting pump.
- the exposed end of the extraction pipe is connected to the gas drainage pipe network, and a heating device is installed on the exposed section of the heat pipe;
- the present invention utilizes a heat pipe to continuously release heat in a borehole, and continuously heats the coal body or the surrounding coal body in the borehole to form a higher temperature field.
- the law of gas adsorption reduction occurs when the coal temperature rises, thereby promoting the desorption of gas and achieving the purpose of strengthening gas drainage, significantly expanding the effective pressure relief range of single holes, and improving the gas drainage efficiency of coal seam by more than 40%.
- the method is safe and reliable, low in cost, simple and easy to operate, saves time and labor, and has wide practicality.
- FIG. 1 is a schematic view of a method for enhancing thermal drainage in a borehole according to the present invention
- FIG. 2 is a schematic view showing the staggered arrangement of the extraction drilling holes and the thermal displacement drilling holes of the present invention.
- the borehole internal thermal flooding enhanced drainage method of the present invention comprises a through-hole drilling or a bedding drilling:
- the heating device 4 After the end of the sealing, the heating device 4 is started, the heat pipe 5 starts to work, the heat pipe absorbs heat from the heating device, releases heat in the borehole, and releases heat in the borehole by continuously driving the heat to the borehole, thereby improving the borehole. And the temperature of the coal around the borehole, promote the gas analysis of the coal in the area, and then achieve the thermal flooding enhanced pumping;
- the distance between the extraction drilling hole and the thermal drive for the end of the drilling end is 6-8 m; when drilling the bedding layer, the drilling hole and the thermal drive replace the drilling hole end.
- the center connection distance is 3 to 5 m.
- the heating device adopts a water circulation heating method or an electric heating tube heating method.
- the heating device is a closed container, and after the explosion-proof treatment, the heating element is immersed in the water and passed through The hot water further heats the heat pipe or is isolated from the surrounding environment, and heats the heat pipe by heat radiation and heat convection, has no direct contact with the heat pipe, and has no direct contact with the downhole air.
- the heat pipe is composed of a pipe shell, a liquid absorbing core and an end cover, and is a mature heat dissipating device on the market, which utilizes the liquid filled in the pipe, absorbs heat at one end of the heat pipe, and releases heat at the other end, thereby realizing heat. transfer.
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- 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)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Road Paving Structures (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims (3)
- 一种钻孔内热驱替式强化抽采方法,包括穿层钻孔或顺层钻孔,在煤层中间隔布置多个抽采钻孔的孔位;依次施工抽采钻孔、封孔、并联入瓦斯抽采管网进行瓦斯抽采;其特征在于步骤如下:a.在多个抽采钻孔中间隔布置多个热驱替钻孔,热驱替钻孔与抽采钻孔成交错排列;b.依次施工热驱替钻孔,退出钻杆后向热驱替钻孔内送入注浆管、回浆管、热管和抽采管,将注浆管的外露端与注浆泵相连接、抽采管外露端与瓦斯抽采管网相连,并在热管的外露段上安装加热装置;c.开启注浆泵,通过注浆管向热驱替钻孔内注浆,待回浆管回浆后,停止注浆,对热驱替钻孔进行封孔;d.启动加热装置,使热管开始工作,不断向热驱替钻孔内释放热量,通过提高钻孔内及钻孔周围煤体的温度,促进区域内煤体的瓦斯解析,从而实现热驱替式强化抽采;e.重复步骤a~d,继续下一区域的热驱替式强化抽采。
- 根据权利要求1所述的一种钻孔内热驱替式强化抽采方法,其特征在于:施工穿层钻孔时,抽采钻孔与热驱替钻孔孔底端中心连线距离为6~8m;施工顺层钻孔时,抽采钻孔和热驱替钻孔孔口端中心连线距离为3~5m。
- 根据权利要求1所述的一种钻孔内热驱替式强化抽采方法,其特征在于:所述的加热装置采用水循环加热方式或电热管加热方式。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US15/323,272 US9869168B2 (en) | 2015-01-12 | 2015-12-09 | Method for thermal-displacement-type strengthened extraction in drill hole |
AU2015377012A AU2015377012B2 (en) | 2015-01-12 | 2015-12-09 | Method for thermal-displacement-type strengthened extraction in drill hole |
Applications Claiming Priority (2)
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CN201510014227.6A CN104533514B (zh) | 2015-01-12 | 2015-01-12 | 一种钻孔内热驱替式强化抽采方法 |
CN201510014227.6 | 2015-01-12 |
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WO2016112759A1 true WO2016112759A1 (zh) | 2016-07-21 |
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Family Applications (1)
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PCT/CN2015/096789 WO2016112759A1 (zh) | 2015-01-12 | 2015-12-09 | 一种钻孔内热驱替式强化抽采方法 |
Country Status (4)
Country | Link |
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US (1) | US9869168B2 (zh) |
CN (1) | CN104533514B (zh) |
AU (1) | AU2015377012B2 (zh) |
WO (1) | WO2016112759A1 (zh) |
Cited By (4)
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CN106285605A (zh) * | 2016-11-01 | 2017-01-04 | 中国矿业大学 | 一种微波液氮协同冻融煤层增透方法 |
CN106401533A (zh) * | 2016-11-25 | 2017-02-15 | 河南理工大学 | 二次利用顺层钻孔注液氮冷冻煤体快速消突装置与方法 |
US9869168B2 (en) | 2015-01-12 | 2018-01-16 | China University Of Mining And Technology | Method for thermal-displacement-type strengthened extraction in drill hole |
CN107893651A (zh) * | 2017-12-04 | 2018-04-10 | 贵州大学 | 一种煤矿井下注热增透装置 |
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- 2015-01-12 CN CN201510014227.6A patent/CN104533514B/zh active Active
- 2015-12-09 WO PCT/CN2015/096789 patent/WO2016112759A1/zh active Application Filing
- 2015-12-09 AU AU2015377012A patent/AU2015377012B2/en active Active
- 2015-12-09 US US15/323,272 patent/US9869168B2/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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US9869168B2 (en) | 2015-01-12 | 2018-01-16 | China University Of Mining And Technology | Method for thermal-displacement-type strengthened extraction in drill hole |
CN106285605A (zh) * | 2016-11-01 | 2017-01-04 | 中国矿业大学 | 一种微波液氮协同冻融煤层增透方法 |
CN106401533A (zh) * | 2016-11-25 | 2017-02-15 | 河南理工大学 | 二次利用顺层钻孔注液氮冷冻煤体快速消突装置与方法 |
CN106401533B (zh) * | 2016-11-25 | 2019-05-10 | 河南理工大学 | 二次利用顺层钻孔注液氮冷冻煤体快速消突装置与方法 |
CN107893651A (zh) * | 2017-12-04 | 2018-04-10 | 贵州大学 | 一种煤矿井下注热增透装置 |
Also Published As
Publication number | Publication date |
---|---|
AU2015377012B2 (en) | 2018-06-14 |
US20170152734A1 (en) | 2017-06-01 |
AU2015377012A1 (en) | 2016-12-15 |
US9869168B2 (en) | 2018-01-16 |
CN104533514B (zh) | 2017-07-07 |
CN104533514A (zh) | 2015-04-22 |
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