CN107339093A - A kind of drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure - Google Patents
A kind of drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure Download PDFInfo
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- CN107339093A CN107339093A CN201710740964.3A CN201710740964A CN107339093A CN 107339093 A CN107339093 A CN 107339093A CN 201710740964 A CN201710740964 A CN 201710740964A CN 107339093 A CN107339093 A CN 107339093A
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- drilling well
- main shaft
- multilateral wells
- gas
- imitative
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- 238000005553 drilling Methods 0.000 title claims abstract description 73
- 241000190021 Zelkova Species 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 41
- 210000003462 vein Anatomy 0.000 claims abstract description 20
- 210000001367 artery Anatomy 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 235000010099 Fagus sylvatica Nutrition 0.000 claims description 7
- 241000269793 Cryothenia peninsulae Species 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 240000000731 Fagus sylvatica Species 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 12
- 238000005086 pumping Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 6
- 230000008033 biological extinction Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 49
- 241001070947 Fagus Species 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007789 sealing 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
-
- 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
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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)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure, is related to mine gas and administers and utilize technical field.The drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure, copies arrangement of the schneider zelkova leaf arteries and veins in blade to be arranged mash gas pumping drilling, mainly includes the following steps that：1st, drilling well-head position is chosen；2nd, schneider zelkova leaf kank structure is imitated to construct to the main shaft of drilling well for gas drainage；3rd, schneider zelkova leaf kank structure is imitated to construct to the Multilateral Wells of drilling well for gas drainage.The drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure, the position of main shaft and Multilateral Wells is arranged according to schneider zelkova leaf kank structure, and the scope that the drilling well length for providing Multilateral Wells is met, reasonably reduce wellbore construction length, realize and efficient extinction is carried out to hypotonicity coal seam, improve coal bed gas extraction efficiency, reduce face gas outburst amount, Coal Seam Outburst Hazard is eliminated, ensures shaft production safety.
Description
Technical field
Technical field, more particularly to a kind of gas of imitative schneider zelkova leaf kank structure are administered and utilized the present invention relates to mine gas
Extraction drilling well method for arranging.
Background technology
With the development of World Economics, dependence of the mankind to fossil energy is increasing, and large-scale, Oversize Mine is near
Put into effect in succession in year.Mine gas is to restrict one of an important factor for China's coal-mine is produced and developed, and gas accident can be made
It is dead into up to a hundred people, or even whole mine can be destroyed overnight.Gas is a kind of disaster gas for the safety in production in colliery
Body, but for utilization of resources angle, gas is also a kind of clean energy resource, and the harmful of pollution air will not be produced after gas combustion
Gas and flue dust, while liberated heat is higher than coal in combustion for methane.
Gas pumping is the current improvement main most straightforward approach of coal mine gas, and mine gas extraction has the extraction time
Long, the characteristics of gas extraction concentration is big, the gas of its extraction can be utilized efficiently, be ensure coal mine production safety and
The key technology that mine gas commercialization utilizes.
Traditional gas pumping method be the tunnel dug in advance from early stage constructed into primitive coalbed concordant or wear layer brill
Hole carries out gas pumping, and these bore arrangement modes require that extraction tunnel is tunneled, more than the sealing of hole number that drill and due to lane in advance
Road end load influences the cranny development around drilling, and air enters extraction system, causes the gas density of extraction low.
In the last few years, with improvement, the raising of drilling tool performance and the optimization of drillng operation pattern that drilling tool designs, Directional Drilling
Enter technological level to be significantly improved, multi-branched horizontal well gas pumping technology is being widely applied more, but it is in drilling well
Often according to engineering experience in terms of arrangement, without concrete foundation, in order to ensure mine safety, people often add against blindness
Wammel well density causes the abundant pressure release in coal seam, adds many unnecessary project inputs.
The content of the invention
The defects of for prior art, the present invention provide a kind of drilling well for gas drainage arrangement side of imitative schneider zelkova leaf kank structure
Method, the wellbore construction length of mine gas extraction is rationally reduced, improve the extraction efficiency of drilling；
A kind of drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure, including following steps：
Step 1：The selection of drilling well-head position；
Correspond to the geological condition of earth's surface according to gas control region, drilling well-head be arranged on treat production zone physical features it is higher and
Flat position；
Step 2：Imitative schneider zelkova leaf kank structure is constructed to the main shaft of drilling well for gas drainage；
Constructed drilling well for gas drainage from ground to target coal seam, buried depth, the pithead position of the track of drilling well by target coal seam
And drill capacity determines；The drilling well length of main shaft is that it is remained in target coal seam into the distance of coal point to borehole bottom location；
The drilling well length of main shaft determines according to the ability of the shape of gas control target area, area and used rig, ensures main shaft
Drilling well length it is maximum in target coal seam；
Step 3：Imitative schneider zelkova leaf kank structure is constructed to the Multilateral Wells of drilling well for gas drainage；
In target coal seam, imitative schneider zelkova leaf kank structure sets one of Multilateral Wells in main shaft both sides at a certain distance respectively, main
The Multilateral Wells of well both sides are staggered, and have certain angle, the plane that Multilateral Wells are formed with main shaft between Multilateral Wells and main shaft
It is parallel with coal seam；The both sides of described main shaft per, apart from all same, meeting l ∈ (0.04L, 0.25L) between the Multilateral Wells butt of side,
Wherein, L is that l is the both sides of main shaft per side Multilateral Wells butt from drilling well length of the coal point to the main shaft of borehole bottom location is entered in drilling well
Between distance, distance is l/2 between the relative Multilateral Wells butt of two side positions；The drilling well length of Multilateral Wells meetsWherein, P is the drilling well length of Multilateral Wells, and t is Multilateral Wells butt
To the length of borehole bottom location, the Multilateral Wells butt is the intersection point of Multilateral Wells and main shaft.
Further, the value of the angle of the Multilateral Wells described in step 3 and main shaft is in beech tree main lobe arteries and veins and two level vein
In the range of angle value, that is, it is taken as 25 °~75 °.
As shown from the above technical solution, the beneficial effects of the present invention are：A kind of imitative schneider zelkova leaf kank provided by the invention
The drilling well for gas drainage method for arranging of structure, by the way that schneider zelkova leaf arteries and veins distributed constant is surveyed and optimized, its rule is applied to
In the preferred arrangement of mash gas pumping drilling, the position of main shaft and Multilateral Wells is arranged according to schneider zelkova leaf kank structure, and provides Multilateral Wells
The scope that is met of drilling well length, reasonably reduce wellbore construction length, realize and hypotonicity coal seam is efficiently disappeared
It is prominent, coal bed gas extraction efficiency is improved, reduces face gas outburst amount, eliminates Coal Seam Outburst Hazard, working face is solved and returns
During adopting the problem of gas exceeding limit, ensure shaft production safety.
Brief description of the drawings
Fig. 1 is that schneider zelkova leaf kank structure arrangement drilling well for gas drainage is imitated in gas control target area provided in an embodiment of the present invention
Structural representation；
Fig. 2 is the gas pumping provided in an embodiment of the present invention that schneider zelkova leaf kank structure arrangement is imitated in gas control target area
The arrangement result schematic diagram of drilling well.
In figure：1st, ground aperture；2nd, coal point is entered；3rd, drilling well borehole bottom location；4th, target coal seam；5th, gas control target area
Domain.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
The present embodiment is directed to the concrete condition in certain coal seam, is arranged using a kind of drilling well for gas drainage of imitative schneider zelkova leaf kank structure
Drilling well for gas drainage as shown in Figure 1 is arranged in the target area that method is administered to coal-bed gas, specifically includes following steps：
Step 1：Choose the position of drilling well-head 1；
According to the geological condition of the corresponding earth's surface in gas control target area 5, it is higher and flat that drilling well-head 1 is arranged on physical features
Position；
Step 2：Imitative schneider zelkova leaf kank structure is constructed to the main shaft of drilling well for gas drainage；
Constructed drilling well for gas drainage from ground to target coal seam, the track of drilling well by target coal seam buried depth, pithead position and
Drill capacity determines；The drilling well length of main shaft is that the distance of borehole bottom location 3 is arrived into coal point 2, and its end is maintained in target coal seam 4；
The drilling well length of main shaft determines according to the ability of the shape of gas control target area 5, area and used rig, ensures main shaft
Drilling well length it is maximum in target coal seam 4；In the present embodiment, the construction of main shaft is as shown in figure 1, gas control target coal seam area
Domain 5 be 1400 × 600m rectangular configuration, the drilling ability of rig with reference to selected by the ore deposit, to ensure that the drilling well length of main shaft exists
It is up to principle in target coal seam 4, the present embodiment sets the drilling well length L into the main shaft of coal point 2 to borehole bottom location 3 as 1000m.
Step 3：Imitative schneider zelkova leaf kank structure is constructed to the Multilateral Wells of drilling well for gas drainage；
By being surveyed to schneider zelkova leaf kank structure, the distance between two level vein of a large amount of beech trees, two level vein are obtained
Length and the angle of beech tree main lobe arteries and veins and two level vein measured data, and these measured datas are entered using least square method
Row fitting of a polynomial optimizes, and obtains the distance between two level vein of beech tree, the length of two level vein and beech tree main lobe arteries and veins and two
Number range where the angle of level vein, these number ranges is applied to the construction of the Multilateral Wells of drilling well for gas drainage.
In target coal seam 4, imitative schneider zelkova leaf kank structure sets one of Multilateral Wells in main shaft both sides at a certain distance respectively, main
The Multilateral Wells of well both sides are staggered, and have certain angle, the plane that Multilateral Wells are formed with main shaft between Multilateral Wells and main shaft
It is parallel with coal seam.Number where the distance between two level vein butt obtained after being optimized according to schneider zelkova leaf kank structure measured data
Be worth scope, the both sides of described main shaft per, apart from all same, meeting l ∈ (0.04L, 0.25L) between the Multilateral Wells butt of side, its
In, L is that l is the distance between the every side Multilateral Wells butt in both sides of main shaft from main shaft length of the coal point to borehole bottom location is entered in drilling well,
Distance is l/2 between the relative Multilateral Wells butt of two side positions.Distance l between the present embodiment Multilateral Wells butt is taken as 0.2L=
200m, then branch's number is 7, is staggeredly located at main shaft both sides respectively, distance is l/2 between the relative Multilateral Wells butt of two side positions
=100m.Number range where the length of the two level vein obtained after being optimized according to schneider zelkova leaf kank structure measured data, it is described
Multilateral Wells drilling well length meetWherein, P is Multilateral Wells
Drilling well length, t are length of the Multilateral Wells butt to borehole bottom location 3, and the Multilateral Wells butt is the intersection point of Multilateral Wells and main shaft, this
The drilling well length of each Multilateral Wells is as shown in table 1 in embodiment.Angle value between Multilateral Wells and main shaft in beech tree main lobe arteries and veins and
In the range of the angle value of two level vein, the beech tree main lobe arteries and veins and two level leaf that are obtained after being optimized according to schneider zelkova leaf kank structure measured data
The span of number range where the angle of arteries and veins, Multilateral Wells and main shaft angle theta be 25 °~75 °, the present embodiment Multilateral Wells with
The angle theta of main shaft takes 45 °.
The Multilateral Wells length of the diverse location of table 1
Drilling well for gas drainage as shown in Figure 2 is obtained according to the design parameter of above mash gas pumping drilling to arrange, Multilateral Wells
For interlaced arrangement in main shaft both sides, the plane of main shaft and branch's well construction is parallel with target coal seam at a certain distance.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in previous embodiment, either which part or all technical characteristic are equal
Replace；And these modifications or replacement, the essence of appropriate technical solution is departed from the model that the claims in the present invention are limited
Enclose.
Claims (2)
- A kind of 1. drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure, it is characterised in that：Including following steps：Step 1：The selection of drilling well-head (1) position；According to the geological condition of gas control target area (5) corresponding earth's surface, drilling well-head (1), which is arranged on, treats production zone physical features Higher and flat position；Step 2：Imitative schneider zelkova leaf kank structure is constructed to the main shaft of drilling well for gas drainage；Constructed drilling well for gas drainage from ground to target coal seam, the track of drilling well by target coal seam buried depth, pithead position and brill Function power determines；The drilling well length of main shaft is that the distance of borehole bottom location (3) is arrived into coal point (2), and it remains at target coal seam (4) in；The drilling well length of main shaft according to the ability of the shape of gas control target area (5), area and used rig determine, Ensure that the drilling well length of main shaft is maximum in target coal seam (4)；Step 3：Imitative schneider zelkova leaf kank structure is constructed to the Multilateral Wells of drilling well for gas drainage；In target coal seam (4), imitative schneider zelkova leaf kank structure sets one of Multilateral Wells at a certain distance respectively in main shaft both sides, The Multilateral Wells of main shaft both sides are staggered, and have certain angle between Multilateral Wells and main shaft, what Multilateral Wells were formed with main shaft Plane is parallel with coal seam；The both sides of described main shaft per apart from all same, meet between the Multilateral Wells butt of side l ∈ (0.04L, 0.25L), wherein, L is that l is that the both sides of main shaft are divided per side from drilling well length of the coal point to the main shaft of borehole bottom location is entered in drilling well Distance between branch well butt, distance is l/2 between the relative Multilateral Wells butt of two side positions；The drilling well length of Multilateral Wells meetsWherein, P is the drilling well length of Multilateral Wells, and t is Multilateral Wells butt To the length of borehole bottom location (3), the Multilateral Wells butt is the intersection point of Multilateral Wells and main shaft.
- A kind of 2. drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure according to claim 1, it is characterised in that： The value of the angle of Multilateral Wells and main shaft described in step 3 takes in the range of the angle value of beech tree main lobe arteries and veins and two level vein For 25 °~75 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710740964.3A CN107339093A (en) | 2017-08-25 | 2017-08-25 | A kind of drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure |
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| CN201710740964.3A CN107339093A (en) | 2017-08-25 | 2017-08-25 | A kind of drilling well for gas drainage method for arranging of imitative schneider zelkova leaf kank structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108625824A (en) * | 2018-05-02 | 2018-10-09 | 辽宁工程技术大学 | A kind of buried aqueous coal bed gas extraction drilling method for arranging |
| CN111594258A (en) * | 2020-04-29 | 2020-08-28 | 中煤科工集团西安研究院有限公司 | Technical method for quickly extracting gas to reach standard by using broken soft low-permeability outburst coal seam instead of roadway through holes |
| CN111764954A (en) * | 2020-07-13 | 2020-10-13 | 中煤科工集团重庆研究院有限公司 | Long-distance target gas content identification and three-dimensional gas extraction method |
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Application publication date: 20171110 |