CN107313743A - One kind is using coal bed gas well to seat earth water barrier weak area band method for repairing and mending - Google Patents
One kind is using coal bed gas well to seat earth water barrier weak area band method for repairing and mending Download PDFInfo
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- CN107313743A CN107313743A CN201710535523.XA CN201710535523A CN107313743A CN 107313743 A CN107313743 A CN 107313743A CN 201710535523 A CN201710535523 A CN 201710535523A CN 107313743 A CN107313743 A CN 107313743A
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- slip casting
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- 239000003245 coal Substances 0.000 title claims abstract description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 230000004888 barrier function Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007569 slipcasting Methods 0.000 claims abstract description 67
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 230000009172 bursting Effects 0.000 claims abstract description 4
- 230000035699 permeability Effects 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004035 construction material Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 210000004911 serous fluid Anatomy 0.000 claims description 3
- 230000001568 sexual effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 description 9
- 230000018109 developmental process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 235000019738 Limestone Nutrition 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 241000256135 Chironomus thummi Species 0.000 description 1
- 235000009781 Myrtillocactus geometrizans Nutrition 0.000 description 1
- 240000009125 Myrtillocactus geometrizans Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003094 perturbing effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 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
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
Abstract
Technical field is adopted altogether the invention belongs to coal and coal bed gas resource, in order to make full use of grouting and reinforcing repairing is carried out to intending the weak zone of working seam water-resisting floor, the invention provides one kind using coal bed gas well to seat earth water barrier weak area band method for repairing and mending, this method is to reinforce coal seam water-resisting floor using discarded coal bed gas well, first passes through and creeps into form the extension slip casting repairing section drilling that coal bed gas well extends downwardly section in discarded coal bed gas well bottom；Then section drilling progress high-pressure slip-casting is repaired by extending slip casting, fills the water producing fractures in seat earth water barrier, reinforced the weak water barrier intensity of seat earth, water producing fractures closing, feed channel of cutting off the water supply reduces the possibility of coal seam bottom water bursting.
Description
Technical field
Technical field is adopted altogether the invention belongs to coal and coal bed gas resource, and in particular to one kind is using coal bed gas well to coal seam bottom
Plate water barrier weak area band method for repairing and mending.
Background technology
With the expansion of cbm development scale, influence of the cbm development to following coal mining is increasingly highlighted, as
Sleeve pipe is left in face coal bed gas extraction drilling well, is unfavorable for coal mining；Ground drilling and hydraulic fracturing etc. are anti-reflection, and measure destroys coal
Layer roof and floor condition, easily links up water-bearing layer, potential safety hazard etc. is carried out to following coal mining belt.Cbm development straight well typically all exists
40-50m completions under seat earth, CBM Drilling plays the role of disturbance destruction to seat earth, and after coal bed gas extraction,
The exploitation effect of coal causes the secondary destruction of bottom plate.If coal seam is small to interlamellar spacing between water-bearing layer, in cbm development
Afterwards there is Water Inrush danger in coal mining.
Such as in the southern Jincheng Mining Area of Qinshui Basin In Shanxi Province into village field with "nine squares", CBM Drilling is typically lower to arrive Taiyuan group
15# coals bottom 40m-50m or so.According to geologic information, area's aquifer in Ordovician limestone water level elevation is 454.70m ~ 535m；And coal seam
Mining elevation is between 420 ~ 730m, the water level of aquifer in Ordovician limestone will be higher by each 0 ~ 112m of seat earth.In this case, coal
Layer pneumatic drill well has the possibility of conducting Ordovician karst water.At present, Shanxi blue-flame coal bed gas company is in Jincheng Mining Area into applying in the range of the ore deposit of the village
The mouth of work coal bed gas well more than 260, area's cbm development is using connection floor mining type, i.e. 3#, 9#, 15# coal while working seam
Gas.Production practices show that some well liquid faces delay to decline, and maintain always above 3# coal seams, and liquid level reduction is difficult, and having can
Communication can be formd with bottom Ordovician limestone aquifer water, be possible in progress of coal mining deposit after cbm development
In gushing water hidden danger.
Therefore, existing coal bed gas well is made full use of, reinforcing and repairing is carried out for the weak area of seat earth water barrier, no
Production cost can be only reduced, can also effectively prevent Water Inrush, the safety guarantee energy of following coal mining is obviously improved
Power.
The content of the invention
The invention solves the problems that key technical problem be：
（1）Existing discarded coal bed gas well how is made full use of, is noted to intending the weak zone of working seam water-resisting floor
Starch reinforcing and repairing.Obviously, slip casting intensive treatment is carried out to seat earth water barrier band, it is broken that it can increase seat earth construction
Ore deposit pressure and destruction of the pressure-bearing hydraulic pressure to water-resisting floor are adopted in area and the rock strength of weak water barrier band, reduction, reach safe life
The purpose of production.Under normal circumstances, frequently with down-hole drilling grouting and reinforcing and surface drilling grouting and reinforcing, wherein underground bottom in engineering
Plate grouting reinforcement technique is crept into using convolution, and perforate inclination angle is certain, and pore-forming is also straight hole, and hole mark is not easily controlled, slip casting section ratio
Shorter, slip casting effect is not fine, and drilling utilization rate is also than relatively low, and underground sets up interim slip casting station and compares labor intensive thing
Power, mechanization degree is not also high.Surface drilling slip casting, comparatively preferably, operating efficiency is greatly improved working environment, but will
Significantly increase borehole engineering expense and extension duration.Therefore, coal bed gas well is made full use of to carry out slip casting, it will to reduce drilling expense
With raising slip casting efficiency and quality play the multifunctionality of coal bed gas well, realize the high usage of coal bed gas well.
（2）The scope and quality of grouting and reinforcing repairing are carried out to the water barrier weak area band of seat earth 4 using coal bed gas well
Control technology.Coal bed gas well is the drilling well dug for the characteristic distributions of coal bed gas resource, and its well location spacing and layout can not be covered
Lid seat earth water barrier weak area, therefore present invention needs are in coal bed gas well drilling extension 16, grouting pressure, injecting paste material
In terms of take measures, the scope and quality of strict control grouting and reinforcing repairing, repairing enhancing seat earth 4 is strong to greatest extent
Degree, reduces the hydraulic conductivity of the rock mass of seat earth 4.
The specific of the present invention adopts the following technical scheme that：
One kind is using coal bed gas well to seat earth water barrier weak area band method for repairing and mending, and this method is to utilize discarded coal bed gas well
To reinforce coal seam water-resisting floor, first pass through and creep into form the extension that coal bed gas well extends downwardly section in discarded coal bed gas well bottom
Slip casting repairing section drilling；Then repaired by extending slip casting in section drilling progress high-pressure slip-casting, filling seat earth water barrier
Water producing fractures, are reinforced the weak water barrier intensity of seat earth, water producing fractures closing, feed channel of cutting off the water supply, reduction
The possibility of coal seam bottom water bursting.
Specific construction technique is as follows：
1）Coal bed gas well is chosen, rig and construction material prepare；
2）Along coal bed gas well tripping in pneumatic down-hole hammer, coal bed gas well extension slip casting section drilling drilling is carried out, construction extension slip casting is repaiied
When mending section drilling, spud in hole by the two of former discarded coal bed gas well or three hole bottom holes of spudding in continue to creep into, pass through seat earth water proof
The seat earth water producing fractures of layer, to bottom hole formation extension slip casting repairing section drilling；
3）Packer permeability test is done in well, the permeability of extension slip casting section drilling is determined；
4）Tripping in high-pressure slip-casting device sets stop grouting plug, hole inner high voltage note to bottom hole at the top of extension slip casting repairing section drilling
Slurry；
5）Slip casting is finished, Hou Ning；
6）Using pneumatic down-hole hammer, cleaning bottom of hole is carried out to extension slip casting repairing section drilling, bottom hole is drilled into；
7）Packer permeability test is done in well again, the permeability of extension slip casting section drilling is determined, if permeability is unsatisfactory for requiring, repeats
4）-5）；If permeating sexual satisfaction requirement, repair grouting is terminated, and coal bed gas well is filled to roof using cement grout
More than, form closure slurry；
8）Seal and protect coal bed gas well well head up for safekeeping.
If segmenting slip casting, since hole-bottom slurry-injection, bottom slip casting is finished, then carries out top slip casting, repeats 4）-5）Step
Suddenly, until the whole grouting and reinforcings of extension slip casting repairing section drilling, Hou Ning.
The final depth of drill hole of the extension slip casting repairing section drilling is 40 ~ 60m below seat earth or drilled to aqueous
Layer top plate.
Grouting serous fluid uses neat slurry, and the ratio of mud is 1：1.6, density is 1.65t/m3。
Final grouting pressure is 6-10MPa.
After coal bed gas well mining is finished, the pipe well of coal bed gas well is carried out transformation re-using by the present invention, in bottom hole（Two open
Drill or three open foot of hole）Continue to drill, pass through seat earth water producing fractures, until close to water-bearing layer, forming extension slip casting
Repair section drilling.The form that section drilling carries out complete opening or segmentation high-pressure slip-casting is repaired by extending slip casting, it is weak to seat earth
Area and its water producing fractures carry out grouting and reinforcing, gradually to reduce the water penetration of water producing fractures, and feed channel of cutting off the water supply increases coal
The mechanical strength of layer bottom plate, greatly promotes the protrusion-dispelling outlet capacity of seat earth.
Brief description of the drawings
Fig. 1 is that Hole cross-section plotting is repaired in slip casting（Bottom slip casting）；
Fig. 2 is that Hole cross-section plotting is repaired in slip casting（Top slip casting）；
Fig. 3 is that Hole cross-section plotting is repaired in slip casting（Shaft bottom is backfilled）；
In figure：1. the 4th is；2. Strata Overlying The Seam；3. coal seam；4. seat earth water barrier；5. water-bearing layer；6. aperture；7. one
Spud in hole；8. surface pipe；9. outer layer sleeve shell material；10. two spud in hole；11. protective casing；12. the outer injecting cement paste of protective casing；
13. three spud in hole；14. production casing；15. the outer injecting cement paste of production casing；16. extend slip casting repairing section drilling；17. stop grouting plug；
18. seat earth water producing fractures；19. bottom hole；20. injecting cement paste；21. block slurry.
Embodiment
With reference to accompanying drawing, the embodiment to the present invention is described further：
The present invention recycles problem for discarded coal bed gas well, based on coal bed gas well bottom injected hole extension drilling, extension
The ancillary techniques such as slip casing by pressure, coal bed gas well filling, solve and utilize discarded coal bed gas well repairing and reinforcing seat earth water barrier
The technical barrier of weak area.It is characterized in that, in discarded coal bed gas well bottom（Spud in the bottom of hole 13 in two holes 10 or three of spudding in
Portion）Continue to creep into using pneumatic down-hole hammer（94 ~ φ of bore diameter φ 75）, form coal bed gas well and extend downwardly section injected hole 16.
Then, slip casting section high-pressure slip-casting is extended by coal bed gas well, fills the water producing fractures 18 of the water barrier of seat earth 4（Weathering fissures,
Structural fracture, Karst Fissures or solution cavity）, reinforced weak water barrier intensity, water producing fractures closing, supply of cutting off the water supply is logical
Road, reduces the possibility of coal seam bottom water bursting, realizes the comprehensive recycling of discarded coal bed gas well.
The construction technology of the present invention is as follows：
1）Coal bed gas well is chosen, rig and construction material prepare；
2）Along coal bed gas well tripping in pneumatic down-hole hammer, carry out coal bed gas well extension slip casting section drilling 16 and creep into, pass through seat earth
Water barrier 4 and its water producing fractures 18, to bottom hole 19, final depth of drill hole Hz is perturbing area below seat earth（Desirable 40 ~ 60m）
Or close to water-bearing layer top plate, carry brill；
3）Packer permeability test is done in well, the permeability of extension slip casting section drilling 16 is determined；
4）Tripping in high-pressure slip-casting device sets stop grouting plug 17, hole inner high voltage slip casting, note to bottom hole 19 at the top of slip casting section drilling
Starch parameter as follows：
1. grouting serous fluid is matched：Neat slurry, with the ratio of mud 1：, can be according to drilling midge on the basis of 1.6, density 1.65t/m3
The parameter adjustment concentration such as amount, pore pressure, optimum proportioning is determined by grouting test；
2. final grouting pressure Pz：By aperture, pressure is defined, and final grouting pressure can use 6-10MPa, should specifically carry out grouting test determination；
3. maximum grouting amount Qz：Maximum grouting amount is estimated by range of grouting with crack rate.
5）Slip casting is finished, Hou Ning；
6）, need to be since hole-bottom slurry-injection if segmenting slip casting, bottom slip casting is finished, then carries out top slip casting, repeats 4）-5）Step
Suddenly, until the whole grouting and reinforcings of extension slip casting repairing section drilling 16, Hou Ning；
7）Using pneumatic down-hole hammer, cleaning bottom of hole is carried out to extension slip casting repairing section drilling 16, bottom hole 19 is drilled into；
8）Packer permeability test is done in well again, the permeability of extension slip casting section drilling 16 is determined.If permeability is unsatisfactory for requiring, repeat
4）-6）；If permeating sexual satisfaction requirement, repair grouting is terminated, and coal bed gas well is filled to roof using cement grout
More than, form closure slurry 21；
9）Seal and protect coal bed gas well well head up for safekeeping.
Claims (6)
1. one kind is using coal bed gas well to seat earth water barrier weak area band method for repairing and mending, it is characterised in that this method is profit
Coal seam water-resisting floor is reinforced with discarded coal bed gas well, first pass through crept into discarded coal bed gas well bottom to be formed coal bed gas well to
The extension slip casting repairing section drilling of lower extension；Then section drilling progress high-pressure slip-casting is repaired by extending slip casting, fills coal seam
Water producing fractures in water-resisting floor, are reinforced the weak water barrier intensity of seat earth, and water producing fractures closing is cut off the water supply
Feed channel, reduces the possibility of coal seam bottom water bursting.
2. utilization coal bed gas well according to claim 1 is to seat earth water barrier weak area band method for repairing and mending, its feature
It is, Specific construction technique is as follows：
1）Coal bed gas well is chosen, rig and construction material prepare；
2）Along coal bed gas well tripping in pneumatic down-hole hammer, coal bed gas well extension slip casting section drilling drilling is carried out, construction extension slip casting is repaiied
When mending section drilling, spud in hole by the two of former discarded coal bed gas well or three hole bottom holes of spudding in continue to creep into, pass through seat earth water proof
The seat earth water producing fractures of layer, to bottom hole formation extension slip casting repairing section drilling；
3）Packer permeability test is done in well, the permeability of extension slip casting section drilling is determined；
4）Tripping in high-pressure slip-casting device sets stop grouting plug, hole inner high voltage note to bottom hole at the top of extension slip casting repairing section drilling
Slurry；
5）Slip casting is finished, Hou Ning；
6）Using pneumatic down-hole hammer, cleaning bottom of hole is carried out to extension slip casting repairing section drilling, bottom hole is drilled into；
7）Packer permeability test is done in well again, the permeability of extension slip casting section drilling is determined, if permeability is unsatisfactory for requiring, repeats
4）-5）；If permeating sexual satisfaction requirement, repair grouting is terminated, and coal bed gas well is filled to roof using cement grout
More than, form closure slurry；
8）Seal and protect coal bed gas well well head up for safekeeping.
3. utilization coal bed gas well according to claim 2 is to seat earth water barrier weak area band method for repairing and mending, its feature
It is：If segmenting slip casting, since hole-bottom slurry-injection, bottom slip casting is finished, then carries out top slip casting, repeats 4）-5）Step, directly
To the whole grouting and reinforcings of extension slip casting repairing section drilling, Hou Ning.
4. utilization coal bed gas well according to claim 3 is to seat earth water barrier weak area band method for repairing and mending, its feature
It is：Extend the final depth of drill hole of slip casting repairing section drilling for 40 ~ 60m below seat earth or drill to water-bearing layer top plate.
5. utilization coal bed gas well according to claim 4 is to seat earth water barrier weak area band method for repairing and mending, its feature
It is：Grouting serous fluid uses neat slurry, and the ratio of mud is 1：1.6, density is 1.65t/m3。
6. utilization coal bed gas well according to claim 5 is to seat earth water barrier weak area band method for repairing and mending, its feature
It is：Final grouting pressure is 6-10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710535523.XA CN107313743B (en) | 2017-07-04 | 2017-07-04 | Method for repairing weak zone of coal seam floor water-resisting layer by utilizing coal seam gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710535523.XA CN107313743B (en) | 2017-07-04 | 2017-07-04 | Method for repairing weak zone of coal seam floor water-resisting layer by utilizing coal seam gas well |
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| Publication Number | Publication Date |
|---|---|
| CN107313743A true CN107313743A (en) | 2017-11-03 |
| CN107313743B CN107313743B (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710535523.XA Active CN107313743B (en) | 2017-07-04 | 2017-07-04 | Method for repairing weak zone of coal seam floor water-resisting layer by utilizing coal seam gas well |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630211A (en) * | 2018-08-31 | 2019-12-31 | 中国矿业大学 | Method for blocking overburden mining-induced fracture by ultrasonic in-situ slurry making |
| CN112664159A (en) * | 2020-12-24 | 2021-04-16 | 北京大地高科地质勘查有限公司 | Horizontal directional leaking stoppage method for small-sized cracks of coal seam roof |
| CN113464144A (en) * | 2021-06-16 | 2021-10-01 | 枣庄矿业(集团)有限责任公司 | Ground grouting process for treating water leakage and cracks of coal mine shaft in Lunan region |
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| CN201474608U (en) * | 2009-08-19 | 2010-05-19 | 兴和鹏能源技术(北京)有限公司 | Coal-bed-gas production-increase and gas water-inrush-prevention horizontal well |
| CN103216249A (en) * | 2013-04-02 | 2013-07-24 | 中国矿业大学 | Waterproof support method of water sump of water-swellable soft rock of underground coal mine |
| CN106437790A (en) * | 2016-12-02 | 2017-02-22 | 淮北矿业股份有限公司 | High-pressure-intensity water-containing layer karst fissure grouting method of difficult mining coal seam base plate thin-layer limestone |
| CN106545296A (en) * | 2016-12-02 | 2017-03-29 | 淮北矿业股份有限公司 | A kind of surface drilling grouting treatment method of deep mining coal seam base plate limestone water damage |
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2017
- 2017-07-04 CN CN201710535523.XA patent/CN107313743B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201474608U (en) * | 2009-08-19 | 2010-05-19 | 兴和鹏能源技术(北京)有限公司 | Coal-bed-gas production-increase and gas water-inrush-prevention horizontal well |
| CN103216249A (en) * | 2013-04-02 | 2013-07-24 | 中国矿业大学 | Waterproof support method of water sump of water-swellable soft rock of underground coal mine |
| CN106437790A (en) * | 2016-12-02 | 2017-02-22 | 淮北矿业股份有限公司 | High-pressure-intensity water-containing layer karst fissure grouting method of difficult mining coal seam base plate thin-layer limestone |
| CN106545296A (en) * | 2016-12-02 | 2017-03-29 | 淮北矿业股份有限公司 | A kind of surface drilling grouting treatment method of deep mining coal seam base plate limestone water damage |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630211A (en) * | 2018-08-31 | 2019-12-31 | 中国矿业大学 | Method for blocking overburden mining-induced fracture by ultrasonic in-situ slurry making |
| CN110630211B (en) * | 2018-08-31 | 2021-08-17 | 中国矿业大学 | Method for blocking overburden mining-induced fracture by ultrasonic in-situ slurry making |
| CN112664159A (en) * | 2020-12-24 | 2021-04-16 | 北京大地高科地质勘查有限公司 | Horizontal directional leaking stoppage method for small-sized cracks of coal seam roof |
| CN113464144A (en) * | 2021-06-16 | 2021-10-01 | 枣庄矿业(集团)有限责任公司 | Ground grouting process for treating water leakage and cracks of coal mine shaft in Lunan region |
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| CN107313743B (en) | 2020-05-12 |
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