CN101503957B - Aboveground and underground combined heat injection coal bed gas extraction method - Google Patents
Aboveground and underground combined heat injection coal bed gas extraction method Download PDFInfo
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- CN101503957B CN101503957B CN200910073743A CN200910073743A CN101503957B CN 101503957 B CN101503957 B CN 101503957B CN 200910073743 A CN200910073743 A CN 200910073743A CN 200910073743 A CN200910073743 A CN 200910073743A CN 101503957 B CN101503957 B CN 101503957B
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Abstract
The invention provides a method for extracting coal bed gas by up-hole and down-hole combination, and relates to the technical field of extracting the coal bed gas (or named as gas). The method can solve the technical problem of pre-extracting the coal bed gas of a coal bed, in particular for a low-permeability coal bed. The method for extracting the coal bed gas by the up-hole and down-hole combination comprises the following steps: carrying out vertical drilling into the coal bed from ground to the coal bed, carrying out an extracting channel in the down hole along the coal bed, and then closing the extracting channel to form a down-hole extracting system; and injecting overheating vapor or overheating water from the ground vertical to the coal bed, displacing the coal bed to flow into the down-hole extracting channel along the coal bed, and then transporting the extracted coal bed gas into a ground coal bed gas system. The method overcomes the deficiency of the prior art, can simply, reliably and efficiently pre-extract the coal bed gas of the coal bed, and in particular for the low-permeability coal bed in large areas, and can basically solve the problems of coal mine gas disasters and the coal bed gas exploitation.
Description
Technical field
The present invention relates to single coal seam or the method for coal seam group extraction coal bed gas of the pumping method, particularly a kind of hyposmosis of coal bed gas (or claim gas).
Background technology
Coal mine gas has become the major safety risks of coal production; Because Chinese coal seam permeability is extremely low; How effectively the extraction coal-bed gas is the great technical barrier that all collieries, the whole nation face, and almost all collieries, the whole nation are that huge effort has been paid in the preparatory extraction of gas and cost produces little effect.
Known coal mine gas has the main pumping method of single coal seam or coal seam group: this coal bed drilling extraction in the coal mine roadway, contiguous coal seam layer-through drilling extraction, or top layer tunnel pumping method etc.; The multi-branched horizontal well pumping method that implement on peupendicular hole that implement on ground and the pressure break pumping method that matches thereof, ground.These conventional methods almost do not have any effect for the coal seam than hyposmosis.
At present, domestic and international many scholar's research temperature to desorption of mash gas velocity effect rule in the coal body.Can improve the desorption of mash gas speed in the coal body though discover temperature, the temperature of research is mostly between 30 ℃～70 ℃.Its result does not produce special influence for quick, high-efficiency mining coal bed gas.Therefore, corresponding industry application method thereof is not proposed yet.
Chinese patent 200710145879.9 discloses " a kind of coal-bed gas exploitation new technology "; This technology is through setting up the vertical shaft that is communicated with ground and coal seam; Then the high-temperature gas after the coal bed gas burning is injected air inlet well heating coal seam, the mist of extraction is separated.At present, because rapidly and efficiently gas separation is still immature, particularly the isolation technics difficulty of carbon dioxide and methane gas is big, makes technology to be difficult to realize the commercial production application.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing coal bed gas pumping method, a kind of method of aboveground and underground combined heat injection coal bed gas extraction is provided.Can large tracts of land, simple and easy reliably, efficiently, high extraction rate ground implements the preparatory extraction of the coal bed gas in coal seam, particularly hyposmosis coal seam, fundamentally solves a coal mine gas disaster and a coal-bed gas exploitation difficult problem.
The present invention realizes through following technical scheme:
A kind of method of aboveground and underground combined heat injection coal bed gas extraction; It is characterized in that: implement vertical drilling from ground to the coal seam and get into the coal seam, implement extraction in the down-hole along the coal seam and use passage, passage is used in airtight then extraction; Form down-hole extraction system; Inject overheated steam or superheated water by the ground peupendicular hole to the coal seam, gas displacing coal-bedly flow into the down-hole extraction along the coal seam and use passage, the coal bed gas with extraction is transported to ground coal bed gas system again.
Described vertical drilling is a bite at least, and in the time of more than two mouthfuls, single layout is positioned at the middle part of two extractions in down-hole with passage, peupendicular hole spacing 50-1000m.
Described overheated steam or superheated water are 80 ℃～300 ℃ hyperthermia and superheating steam or superheated water.
The structure of described vertical drilling is: after peupendicular hole got into the coal seam, the coal seam section was provided with the sleeve pipe of doing flow channel between ability and coal seam, and the above rock stratum section in coal seam is provided with double-deck annulus line, and uses resistant to elevated temperatures well cementing of cement.
The sleeve pipe that described coal seam section is provided with is a kind of floral tube for single coal seam, is a kind of individual layer sleeve pipe for coal seam group.
Passage is used in described extraction, for single main mining coal seam, is at least two the parallel extraction tunnels of constructing along the coal seam of implementing with seam mining big lane oblique or quadrature, more than the spacing 200m of tunnel.
Passage is used in described extraction; For coal seam group; Be to implement and at least two parallel extraction tunnels of main mining coal seam construction, the edge of seam mining big lane oblique or quadrature, more than the spacing 200m of tunnel, along the extraction tunnel to the contiguous up and down coal seam of the main mining coal seam extraction borehole of constructing.
Passage is used in described extraction, for single main mining coal seam, is to implement to hole with at least two parallel overlength of construction along the coal seam of seam mining big lane oblique or quadrature, more than the spacing 200m.
Passage is used in described extraction, for coal seam group, is to implement to hole with at least two the parallel overlength of all will constructing along each thicker coal seam of seam mining big lane oblique or quadrature, more than the spacing 200m.
The method of aboveground and underground combined heat injection coal bed gas extraction of the present invention through to the coal seam heating, reduces the adsorptivity of coal to coal bed gas, quickens the desorb of coal bed gas, because free gas increases rapidly, has increased coal bed gas pressure significantly; Simultaneously, can produce many new thermal fracture cracks after the coal body heating, increase the permeability in coal seam synchronously, thereby improved the coal seam, particularly the coal bed gas extraction rate in hyposmosis coal seam and extraction speed.Owing to adopt the scheme for combining under aboveground, thus realized on a large scale, in large area, simple and easy and implement the extraction of coal bed gas in single coal seam or the coal seam group of hyposmosis reliably.Owing to adopt down-hole extraction system airtight, that concentrate, realized the exploitation of high-purity coal bed gas and the intensification production of extraction system, thereby thoroughly done away with complicated, that disperse, low-security, hang down the drawback of the existing techniques of reliability, high cost of production.
Description of drawings
Fig. 1 is the layout plan that the present invention is directed to construction extraction tunnel, single coal seam and heat injection well;
Fig. 2 is the C-C sectional drawing of Fig. 1;
Fig. 3 is the layout plan that the present invention is directed to single coal seam construction overlength boring and heat injection well;
Fig. 4 is the C-C sectional drawing of Fig. 3;
Fig. 5 is the layout plan that the present invention is directed to coal seam group construction extraction tunnel, contiguous drainage from coal seam boring and heat injection well;
Fig. 6 is the A-A sectional drawing of Fig. 5;
Fig. 7 is the D-D sectional drawing of Fig. 5;
Fig. 8 is the sketch map layout plan that the present invention is directed to coal seam group construction overlength boring and heat injection well;
Fig. 9 is the A-A sectional drawing of Fig. 8;
Figure 10 is the D-D sectional drawing of Fig. 8;
Figure 11 is the layout plan that the present invention is directed to single coal seam construction a bite heat injection well and extraction tunnel;
Figure 12 is the C-C sectional drawing of Figure 11.
The present invention is elaborated through preferred embodiment below in conjunction with accompanying drawing.
The specific embodiment
Embodiment 1:
Like Fig. 1, shown in 2, a kind of aboveground method of the single coal seam of associating heat injection extraction coal bed gas down is 10m at a thickness; In the single coal seam of the nearly level of buried depth 100m, adopt the present invention to arrange two mouthfuls of vertical heat injection wells 1, well spacing 600m; Vertical with big lane, down-hole 3, each drilling well is drilled in the coal seam 6, and roof strata section 5 is divided into double-deck annulus line 8; Coal seam section 6 is divided into floral tube 14, and the skin of the double-deck annulus line 8 in edge adopts resistant to elevated temperatures cement 9 well cementation.Two the extraction tunnels 2 of constructing make it parallel with the line of two mouthfuls of heat injection wells 1, and vertical with big lane 3, the 4 airtight extraction tunnels 2 in the Da Xiang entrance.According to conventional method, install extraction coal bed gas pumping plant and drainage system through airtight extraction tunnel, and monitoring system.
Concrete extraction step is following:
1) with 300 ℃ superheated vapour through heat injection well 1 injection coal seam 6;
2) overheated steam that injects the coal seam to injecting seepage flow around the well, heats the coal seam along the coal seam rapidly, and the coal seam is composed the rapid desorb of the coal bed gas that is stored in the coal seam and become free coal bed gas under high temperature action, and under the driving of steam, seepage flow is transferred to the extraction tunnel;
3) through the condensation in extraction tunnel with separate after, coal bed gas is discharged to ground coal bed gas system through the extraction pump, water is discharged extraction tunnel 2 along gutter.
4) along with the continuous injection coal seam of overheated steam, the coal body in heat injection well 1 and 2 control areas, extraction tunnel is heated, and the coal bed gas in the coal seam can be stopped heat injection by extraction.
Embodiment 2:
Like Fig. 3, shown in 4, a kind of aboveground method of the single coal seam of associating heat injection extraction coal bed gas down is 10m at a thickness; In the single coal seam of the nearly level of buried depth 100m, adopt the present invention to arrange two mouthfuls of vertical heat injection wells 1, well spacing 600m; The big lane in the line of two wells and down-hole 3 is vertical; And be parallel to two extraction overlength borings 10, each drilling well is drilled in the coal seam 6, and roof strata section 5 is divided into double-deck annulus line 8; Coal seam section 6 is divided into floral tube 14, and the skin of the double-deck annulus line 8 in edge adopts resistant to elevated temperatures cement 9 well cementation.Two the extraction overlength of constructing boring 10 makes it parallel with the line of two mouthfuls of heat injection wells 1, and vertical with big lane 3, the 16 airtight extraction overlength borings 10 in extraction overlength boring entrance.According to conventional method, install extraction coal bed gas pumping plant and drainage system through airtight extraction overlength boring, and monitoring system.
Concrete extraction step is following:
1) with 80 ℃ superheated vapour through heat injection well 1 injection coal seam 6;
2) overheated steam that injects the coal seam along the coal seam around heat injection well 1 seepage flow; Heat coal seam 6 rapidly, the coal seam is composed the rapid desorb of the coal bed gas that is stored in the coal seam and is become free coal bed gas under high temperature action; Under the driving of steam, seepage flow is transferred to extraction overlength boring 10;
The coal bed gas of 3) extraction overlength boring 10 is discharged to down-hole large coal bed gas system through the extraction pump, is discharged to ground coal bed gas system after coal bed gas and the separated form water, and water comes underworkings.
4) along with the continuous injection coal seam of overheated steam, the coal body that heat injection well 1 and extraction overlength are holed in 10 control areas is heated, and the coal bed gas in the coal seam can be stopped heat injection by extraction.
Embodiment 3:
Like Fig. 5,6, shown in 7, a kind of method of aboveground down associating heat injection extraction coal seam group coal bed gas, its coal seam thickness are respectively main mining coal seam 6m, upward contiguous coal seam 1.5m and down contiguous coal seam 1m; Last contiguous coal seam and main mining coal seam spacing 3m, following contiguous coal seam and main mining coal seam spacing 4m are the flat seam crowd of main mining coal seam buried depth 400m; Adopt the present invention to arrange two mouthfuls of vertical heat injection wells 1, well spacing 800m is vertical with big lane, down-hole 3; Each drilling well is drilled in the coal seam 6,11,12; Roof strata section 5 is divided into double-deck annulus line 8; Coal seam section 6 is divided into individual layer sleeve pipe 15, and the skin of double-deck annulus line 8 in edge and individual layer sleeve pipe 15 adopts resistant to elevated temperatures cement 9 well cementation, and the communication passage between coal seam and sleeve pipe is done in each coal seam section in the well cementation back.Two the extraction tunnels 2 of constructing make it parallel with the line of two mouthfuls of heat injection wells 1, and vertical with big lane 3.Along roof strata section 5, the base plate 7 in extraction tunnel 2, after construction is close to the extraction borehole 13 in coal seam up and down, the 4 airtight extraction tunnels 2 in the Da Xiang entrance.According to conventional method, through airtight extraction tunnel, install extraction coal bed gas pumping plant and drainage system, and monitoring system.
Concrete extraction step is following:
1) with 300 ℃ superheated water through heat injection well 1 injection coal seam 6,11,12;
2) superheated water that injects the coal seam along the coal seam around the heat injection well seepage flow, heat the coal seam rapidly, the coal seam is composed the rapid desorb of the coal bed gas that is stored in the coal seam and is become free coal bed gas under high temperature action, under the driving of superheated water, seepage flow is transferred to extraction tunnel 2;
3) through the condensation in extraction tunnel with separate after, coal bed gas is discharged to ground coal bed gas system through the extraction pump, water is discharged the extraction tunnel along gutter;
4) along with the continuous injection coal seam of superheated water, the coal body in heat injection well and the control area, extraction tunnel is heated, and the coal bed gas in the coal seam can be stopped heat injection by extraction.
Embodiment 4:
Like Fig. 8,9, shown in 10, a kind of method of aboveground down associating heat injection extraction coal seam group coal bed gas, its coal seam thickness are respectively main mining coal seam 6m, upward contiguous coal seam 1.5m and down contiguous coal seam 1m; Last contiguous coal seam and main mining coal seam spacing 3m, following contiguous coal seam and main mining coal seam spacing 4m are the flat seam crowd of main mining coal seam buried depth 400m; Adopt the present invention to arrange two mouthfuls of vertical heat injection wells 1, well spacing 800m is vertical with big lane, down-hole 3; Each drilling well is drilled in the coal seam 6,11,12; Roof strata section 5 is divided into double-deck annulus line 8; Coal seam section 6 is divided into individual layer sleeve pipe 15, and the skin of double-deck annulus line 8 in edge and individual layer sleeve pipe 15 adopts resistant to elevated temperatures cement 9 well cementation, and the communication passage between coal seam and sleeve pipe is done in each coal seam section in the well cementation back.The extraction overlength of constructing respectively along main mining coal seam and contiguous coal seam up and down holes 10, with 60 ° of angles of 3 obliques, big lane, makes it substantially parallel with the line of two mouthfuls of heat injection wells 1.16 sealing of holes in extraction overlength boring entrance.According to conventional method, through airtight extraction overlength boring 10, install extraction coal bed gas pumping plant and drainage system, and monitoring system.
Concrete extraction step is following:
1) with 80 ℃ superheated water through heat injection well 1 injection coal seam 6,11,12;
2) superheated water that injects the coal seam along the coal seam to injecting seepage flow around the well; Heat the coal seam rapidly, the coal seam is composed the rapid desorb of the coal bed gas that is stored in the coal seam and is become free coal bed gas under high temperature action; Under the driving of superheated water, seepage flow is transferred to main mining coal seam and the extraction overlength boring in contiguous coal seam up and down;
The coal bed gas of 3) extraction overlength boring is discharged to ground coal bed gas system through the extraction pump, and water is discharged extraction borehole along gutter.
4) along with the continuous injection coal seam of superheated water, the coal body in heat injection well and the control area, extraction tunnel is heated, and the coal bed gas in the coal seam can be stopped heat injection by extraction.
Embodiment 5:
Like Figure 11, shown in 12, a kind of aboveground method of the single coal seam of associating heat injection extraction coal bed gas down is 10m at a thickness; In the single coal seam of the nearly level of buried depth 100m, adopt the present invention to arrange the vertical heat injection well 1 of a bite, with big lane, down-hole 3 apart from 500m; Be positioned at 2 middle parts, two extraction tunnels, drilling well is drilled in the coal seam 6, and roof strata section 5 is divided into double-deck annulus line 8; Coal seam section 6 is divided into floral tube 14, and the skin of the double-deck annulus line 8 in edge adopts resistant to elevated temperatures cement 9 well cementation.Two the parallel extraction tunnels 2 of constructing, vertical with big lane 3, make heat injection well 1 be positioned at the middle part in two extraction tunnels 2,4 airtight extraction tunnels 2 in the Da Xiang entrance.According to conventional method, through airtight extraction tunnel, install extraction coal bed gas pumping plant and drainage system, and monitoring system.
Concrete extraction step is following:
1) with 150 ℃ superheated vapour through heat injection well 1 injection coal seam 6;
2) overheated steam that injects the coal seam along the coal seam around the heat injection well seepage flow, heat the coal seam rapidly, the coal seam is composed the rapid desorb of the coal bed gas that is stored in the coal seam and is become free coal bed gas under high temperature action, under the driving of steam, seepage flow is transferred to the extraction tunnel;
3) through the condensation in extraction tunnel with separate after, coal bed gas is discharged to ground coal bed gas system through the extraction pump, water is discharged the extraction tunnel along gutter.
4) along with the continuous injection coal seam of overheated steam, the coal body in heat injection well and the control area, extraction tunnel is heated, and the coal bed gas in the coal seam can be stopped heat injection by extraction.
Claims (2)
1. the method for an aboveground and underground combined heat injection coal bed gas extraction; It is characterized in that: implement vertical drilling from ground to the coal seam and get into the coal seam, implement extraction in the down-hole along the coal seam and use passage, passage is used in airtight then extraction; Form down-hole extraction system; Inject overheated steam or superheated water by the ground peupendicular hole to the coal seam, gas displacing coal-bedly flow into the down-hole extraction along the coal seam and use passage, and then the coal bed gas of extraction is transported to ground coal bed gas system;
Passage is used in described extraction, for single main mining coal seam, is at least two the parallel extraction tunnels of constructing along the coal seam of implementing with seam mining big lane oblique or quadrature, more than the spacing 200m of tunnel; Passage is used in described extraction; For coal seam group; Be to implement and at least two parallel extraction tunnels of main mining coal seam construction, the edge of seam mining big lane oblique or quadrature, more than the spacing 200m of tunnel, along the extraction tunnel to the contiguous up and down coal seam of the main mining coal seam extraction borehole of constructing; Passage is used in described extraction, for single main mining coal seam, is to implement to hole with at least two parallel overlength of construction along the coal seam of seam mining big lane oblique or quadrature, more than the spacing 200m; Passage is used in described extraction, for coal seam group, is to implement to hole with at least two the parallel overlength of all will constructing along each thicker coal seam of seam mining big lane oblique or quadrature, more than the spacing 200m.
2. the method for aboveground and underground combined heat injection coal bed gas extraction according to claim 1 is characterized in that: described overheated steam or superheated water≤300 ℃.
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| CN102162352A (en) * | 2011-04-19 | 2011-08-24 | 王正东 | Novel method for exploiting coal-bed gas |
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| CN110965964B (en) * | 2019-12-16 | 2021-10-12 | 临沂矿业集团菏泽煤电有限公司 | Gas extraction method for ultra-thick coal seam |
| CN113982589B (en) * | 2021-10-26 | 2022-12-23 | 西安交通大学 | Temperature control method and system for in-situ mining of oil-rich coal |
| CN114320440A (en) * | 2021-11-29 | 2022-04-12 | 淮北矿业股份有限公司 | Up-down combined extraction method for well |
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| CN114483160B (en) * | 2021-12-28 | 2023-03-21 | 西安交通大学 | Gas extraction method for connecting roadway |
| CN114704234B (en) * | 2022-03-22 | 2024-02-27 | 太原理工大学 | Method for alternately and circularly injecting heat to extract gas from underground adjacent drilling holes |
| CN114856518B (en) * | 2022-05-09 | 2023-02-03 | 大连理工大学 | Method for increasing production of coal bed gas by using medium-low enthalpy dry rock geothermal energy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508387A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN1676870A (en) * | 2005-04-20 | 2005-10-05 | 太原理工大学 | Method for extracting oil and gas by convection heating of oil shale |
| CN101122217A (en) * | 2007-09-19 | 2008-02-13 | 中国科学院武汉岩土力学研究所 | Down-hole pump drainage laneway exploitation system for mixing gas dispelling coal gas, and the method |
-
2009
- 2009-01-23 CN CN200910073743A patent/CN101503957B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508387A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN1676870A (en) * | 2005-04-20 | 2005-10-05 | 太原理工大学 | Method for extracting oil and gas by convection heating of oil shale |
| CN101122217A (en) * | 2007-09-19 | 2008-02-13 | 中国科学院武汉岩土力学研究所 | Down-hole pump drainage laneway exploitation system for mixing gas dispelling coal gas, and the method |
Non-Patent Citations (2)
| Title |
|---|
| 胡春岩，等.突出矿井瓦斯井上下共同抽放.《煤炭技术》.2008,第27卷(第1期),58-59. * |
| 说明书附图1-2. |
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