CN106703752A - System closing method used for oil shale underground in-situ exploitation - Google Patents
System closing method used for oil shale underground in-situ exploitation Download PDFInfo
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- CN106703752A CN106703752A CN201611097759.1A CN201611097759A CN106703752A CN 106703752 A CN106703752 A CN 106703752A CN 201611097759 A CN201611097759 A CN 201611097759A CN 106703752 A CN106703752 A CN 106703752A
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- oil shale
- grouting
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- hole
- closing
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- 239000004058 oil shale Substances 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 33
- 239000011440 grout Substances 0.000 claims abstract description 4
- 230000035699 permeability Effects 0.000 claims abstract description 3
- 238000007569 slipcasting Methods 0.000 claims description 36
- 239000002002 slurry Substances 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 125000006850 spacer group Chemical group 0.000 claims description 17
- 238000005065 mining Methods 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 15
- 210000004911 serous fluid Anatomy 0.000 claims description 7
- 230000003204 osmotic effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000013517 stratification Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 6
- 239000006227 byproduct Substances 0.000 abstract description 4
- 239000003245 coal Substances 0.000 description 9
- 230000008014 freezing Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 7
- 239000010883 coal ash Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000035515 penetration Effects 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000011414 polymer cement Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 238000003911 water pollution 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/003—Insulating arrangements
-
- 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
-
- 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
- E21B43/241—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale
-
- 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
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
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)
- Railway Tracks (AREA)
Abstract
The invention discloses a system closing method used for oil shale underground in-situ exploitation. The closing system is composed of a top plate thermal insulation closing layer, a bottom plate thermal insulation closing layer and a horizontal exploitation area closing curtain. The system closing method comprises the steps of 1, the bottom plate thermal insulation closing layer is arranged at an oil shale layer bottom plate to cover an oil shale in-situ exploitation area and to connect the horizontal exploitation area closing curtain into an entirety; 2, the top plate thermal insulation closing layer is arranged at an oil shale layer top plate to cover the oil shale in-situ exploitation area, and a method of fracturing grouting is adopted to arrange the top plate thermal insulation closing layer, so that a grout in all grouting holes is mutually through; 3, the horizontal exploitation area closing curtain is consecutive and sealed, and through a method of permeation grouting, the grout penetrates through the exploitation oil shale layer bottom plate, and arrives at a bottom shale layer with poor water permeability. According to the system closing method used for oil shale underground in-situ exploitation, a sealed heating area is provided for oil shale underground in-situ exploitation, and the method is used for preventing exploitation area longitudinal underground water from entering, preventing heat loss and preventing horizontal underground water from entering and oil gas and side products from outflowing.
Description
Technical field
It is more particularly to a kind of for oil shale underground in situ exploitation the present invention relates to a kind of ground in-situ system enclosure method
System enclosure method.
Background technology
Oil shale in-situ production technique is a kind of new oil shale mining type after oil shale retorting, and it is by boring
The mode such as hole and hydraulic fracturing, forms heating passage, to oil shale after thermal source entrance heating passage in subterranean oil shale rock stratum
Heating destructive distillation is carried out, the air-fuel mixture product of generation is derived to earth's surface through recovery well and carries out separating treatment.The oil shale that compares is done
Technology is evaporated, oil shale in-situ production technique has ground installation few, and floor space is small, small grade is polluted in production process significantly excellent
Point.
Oil shale in-situ exploitation needs form one in underground mainly includes that oil shale heats passage and oil shale layer crack
Closing exploitation space.The exploitation space of such a closing, is conducive to controlling the scope of oil shale in-situ exploitation, it is to avoid former
The adverse effects such as oil gas leakage are produced in the recovery process of position to outside stratum.In the exploitation space of such a high temperature, especially
It is noted that the influence that underground water and the exploitation of temperature diffusion couple are produced.On the one hand, if having water in exploitation space or not exploited
The characteristics of heat insulation work in space, specific heat big due to water, a big chunk heat will be only absorbed by the water, and exploitation is unable to reach in space
Ideal temperature, influences oil shale recovery efficiency.On the other hand, if having water in exploitation space, even if generating oil gas, oil gas
A large amount of vapor can be carried and return to earth's surface, while the work of oil supply gas-water separation brings difficulty, be greatly reduced returning for oil gas
Produce effects rate.If exploitation space is connected with underground aquaporin, the pollutant produced in recovery process can enter underground reservoir,
Polluted underground water.Therefore, it is particularly important for the production zone of oil shale provides closing space.
The ground in-situ production practice (ICP) of Shell Co. Ltd proposes a kind of underground freezing wall technology, with heated well and
It is certain and be interconnected to form the freezing well of closed system that producing well certain distance bores many mouthfuls of spacing, to injecting uniform temperature in well
Freezing liquid in system interior circulation, the underground water around well is formed freezing wall with surrounding rocks.But underground freezes answering for wall
During, there is long construction period, power consumption is high, and the shortcomings of polluting is produced to underground water.
Patent CN102278116B provides a kind of cold districts and makes underground freezing wall device and make freezing wall
Method.The method is sent the low-temperature receiver obtained from winter outdoor temperature by the use of the low-temperature glycol aqueous solution as circulatory mediator
Enter in the hole beaten in advance, freeze geologic body, and then form freezing wall.The method construction can only in the winter time and winter temperature is cold
Area is carried out, and limits larger, without the condition being widely popularized.
The content of the invention
The method presence that closing space is provided the invention aims to solve the existing production zone for oil shale is applied
The work cycle is long, high energy consumption, pollution environment, the problem being subject to seasonal restrictions, and the one kind for providing is applied to different buried depth difference thickness
Oil shale underground in situ exploitation system enclosure method.
Closed system involved in the present invention is by the heat-insulated confining bed of top board, floor spacer confining bed and horizon mining region
Closing curtain composition.
The present invention is comprised the following steps：
The first, floor spacer confining bed is set at oil shale layer base plate, oil shale in-situ production zone is covered, is opened with level
Exploiting field domain closing curtain is connected to become entirety；
It is to bore a series of fracture grouting of quincuncial arrangements on ground for the fracture grouting method of floor spacer confining bed
Hole, the grouting serous fluid in adjacent fracture grouting hole mutually goes here and there footpath, and hole depth reaches oil shale layer base plate.
Injected hole passes through oil shale layer base plate, using the grouting mode of protrusive, slip casting, slurries is carried out in oil shale base plate
Under the action of pulling stress that pressure manages direction more than oil shale in-situ perpendicular to layer, oil shale layer of riving, the splitting route of slurries
In crisscross veiny network, slurries mutually go here and there footpath in each injected hole, form floor spacer confining bed.
The 2nd, the heat-insulated confining bed of top board is set at oil shale top plate, oil shale in-situ production zone is covered, top board is set
Heat-insulated confining bed makes slurries in each injected hole mutually go here and there footpath using the method for fracture grouting.
It is to bore a series of fracture grouting of quincuncial arrangements on ground for the fracture grouting method of the heat-insulated confining bed of top board
Hole, the grouting serous fluid in adjacent fracture grouting hole mutually goes here and there footpath, and hole depth reaches oil shale layer top board.
Injected hole passes through oil shale layer top board, using the grouting mode of protrusive, slip casting, slurries is carried out in oil shale top board
Under the action of pulling stress that pressure manages direction more than oil shale in-situ perpendicular to layer, oil shale layer of riving, the splitting route of slurries
In crisscross veiny network, slurries mutually go here and there footpath in each injected hole, form the heat-insulated confining bed of top board；
Closing mud i.e. fracture grouting slurries are poured into fracture grouting hole, one-way valve tube is inserted to oil shale layer top board,
Grouting serous fluid to be cleaved is set in one-way valve tube, is inserted into slip casting core pipe in one-way valve tube, carries out slip casting；Work as slurry pressure
During more than oil shale in-situ vertical stratification direction tension, slurries are rived in oil shale layer and entrance crack, form top board heat-insulated
Confining bed.
3rd, closing curtain in horizon mining region is continuous and closed, using the method for osmotic grouting, through the oily page of exploitation
Rock stratum base plate, reaches the basal bed of bad hydraulic permeability.
It is to bore a series of single slip castings on ground for the osmotic grouting method of horizon mining region closing curtain construction
Hole, slip casting hole depth is reached at oil shale layer base plate, and the grout mixing that slip casting pitch of holes should meet adjacent holes is overlapped, finally
Continuous and closed horizon mining region closing curtain can be formed.When carrying out slip casting to single hole, should use and be segmented from bottom to top
The mode of slip casting, since oil shale base plate, using only tholepin plug, carries out segmenting slip casting.
The course of work of the invention and principle are：
The present invention is to provide a closed heating zone around oil shale in-situ production zone i.e. heat injection well and recovery well
Domain.
Arrangement fracture grouting hole and curtain-grouting hole, fracture grouting hole is in quincunx distribution, and meets the slip casting of adjacent holes
Slurries mutually go here and there footpath, and hole depth reaches oil shale layer base plate.The rounded single distribution in curtain-grouting hole, adjacent single hole spacing 3m, hole
The deep 5m below oil shale layer base plate.
Closing mud i.e. fracture grouting slurries are poured into fracture grouting hole, one-way valve tube is inserted to oil shale layer base plate,
Grouting serous fluid to be cleaved is set in one-way valve tube, is inserted into slip casting core pipe in one-way valve tube, carries out slip casting.Work as slurry pressure
During more than oil shale in-situ vertical stratification direction tension, slurries are rived in oil shale layer and entrance crack, form floor spacer
Confining bed.Same method can form the heat-insulated confining bed of top board.
After top board, floor spacer confining bed is completed, the construction that curtain is closed in horizon mining region is carried out, single hole is applied
Man-hour, in the curtain-grouting hole under enter grouting pipe, using only tholepin plug segmenting slip casting from bottom to top, by curtain-grouting slurries from
Grouting pipe injects 5-1 sections, treats after the completion of 5-1 sections of injection, starts 5-2 sections of slip casting, until 5-n sections.After the completion of single hole construction,
(construction ultimately forms horizon mining region closing curtain to carry out other curtain-grouting holes again.
After the completion of above step, that is, the heat-insulated closed area of oil shale in-situ exploitation is established, the region can carry out oily page
The follow-up work of rock in-situ retorting.
Beneficial effects of the present invention：The present invention provides a closed heating region for oil shale underground in situ exploitation,
Enter for blocking production zone longitudinal direction underground water, heat scatters and disappears and horizontal direction underground water enters and oil gas and by-product stream
Go out.
Brief description of the drawings
Fig. 1 is the system enclosure method schematic diagram of the embodiment of the present invention.
Fig. 2 is the plane well location layout drawing of the embodiment of the present invention.
Fig. 3 is top board, the floor spacer confining bed construction technology figure of the embodiment of the present invention.
Fig. 4 is the horizon mining region closing curtain construction process figure of the embodiment of the present invention.
Specific embodiment
Refer to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, be the first embodiment of the present invention, the obturator that the present embodiment is related to
System is made up of the heat-insulated confining bed of top board, floor spacer confining bed and horizon mining region closing curtain.
Need to block that underground water enters and heat scatters and disappears on longitudinal direction；Need to block underground water entrance and oil gas in horizontal direction
And byproduct is reserved.
Shown according to geologic information, oil shale layer buried depth is 64~72m, belong to weak water penetration stratum stratum more.The oily page of delineation
Rock production zone is 30m × 30m square areas.
According to the weak water penetration property on stratum, the construction of the heat-insulated confining bed of top board and floor spacer confining bed is first carried out.Adopt
Constructed with fracture grouting method, slip casting bore dia 80mm, hole depth 75m, through oil shale layer.Carried out by quincunx in production zone
Cloth hole, distance between borehole 2.5m.Using protrusive grouting method.Grouting with plunger is：Drilling-slip casting-cleaning bottom of hole-drilling-slip casting.
Drilling to 61m places, under enter stop grouting plug, carry out perforation slip casting, 2.5~3MPa of grouting pressure, material is modified rubber cement, also may be used
Think nano modification superhigh tenacity cement-base composite material.After the completion of top board slip casting, cleaning bottom of hole drilling is carried out, at drilling to 75m, under
Enter stop grouting plug, perforation slip casting is carried out to base plate.
After the completion of the heat-insulated confining bed of top board and floor spacer confining bed fracture grouting, level is formed using permeation grouting method and is opened
Close curtain, slip casting bore dia 80mm, hole depth 80m, to oil shale layer base plate in exploiting field domain.Injected hole is carried out along production zone periphery
Cloth hole, distance between borehole 1m.During single hole mortar depositing construction, using retrusive segmenting slip casting method from bottom to top, segmentation distance is 8m,
1~1.5MPa of grouting pressure, injecting paste material is fast solidifying type polymer cement waterproof slurry.
After the completion of closed system construction, water yield is from 19m in production zone3/ d drops to 1m3Within/d, oil shale in-situ
Production practice is successfully carried out and output shale oil, it was demonstrated that the method can provide the anti-of heat-insulated closing for oil shale in-situ production practice
Region is answered, thermal loss, underground water entrance and the outflow of oil gas and byproduct is reduced.
Refer to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, be the second embodiment of the present invention, the obturator that the present embodiment is related to
System is made up of the heat-insulated confining bed of top board, floor spacer confining bed and horizon mining region closing curtain.
Compared with the Coal Gasification of ground, underground gasification need not be by coal mining to ground, but coal seam is carried out in underground
Gasification, also would not on the ground produce gangue or coal ash to account for the problem that firming ground, dust and fine particulates pollute air, phase
Ying Di, hazardous trace elements can increase the risk of underground water pollution in underground in coal ash.For reduce coal ash and with coal ash in be harmful to
Pollution of the element to groundwater environment, therefore need in advance for underground coal gasification(UCG) provides a resistant-walled production zone.
Shown according to geologic information, somewhere coal seam buried depth is 41.2~47.0m, stratum underground water is on the high side, draw a circle to approve mining area
Domain is 50m × 50m.
According to the weak water penetration property on stratum, the construction of the heat-insulated confining bed of top board and floor spacer confining bed is first carried out.Adopt
Constructed with fracture grouting method, slip casting bore dia 80mm, hole depth 50m, through coal seam.In production zone cloth is carried out by quincunx
Hole, distance between borehole 2.5m.Using protrusive grouting method.Grouting with plunger is：Drilling-slip casting-cleaning bottom of hole-drilling-slip casting.Bore
Proceed at 39m, under enter stop grouting plug, carry out perforation slip casting, 2.5~3MPa of grouting pressure, material is modified rubber cement, it is also possible to
It is nano modification superhigh tenacity cement-base composite material.After the completion of top board slip casting, carry out cleaning bottom of hole drilling, at drilling to 50m, under enter
Stop grouting plug, perforation slip casting is carried out to base plate.
After the completion of the heat-insulated confining bed of top board and floor spacer confining bed fracture grouting, level is formed using permeation grouting method and is opened
Close curtain, slip casting bore dia 80mm, hole depth 54m, to seat earth in exploiting field domain.Injected hole carries out cloth along production zone periphery
Hole, distance between borehole 1m.During single hole mortar depositing construction, using retrusive segmenting slip casting method from bottom to top, segmentation distance is 8m, note
Slurry 1~1.5MPa of pressure, injecting paste material is fast solidifying type polymer cement waterproof slurry.
After the completion of closed system construction, water yield is from 30m in production zone3/ d drops to 1m3Within/d, coal underground gas
Chemical industry skill is successfully carried out and output coal bed gas, it was demonstrated that the method can provide the reaction zone of heat-insulated closing for coal underground gasifying technology
Domain, reduces the pollution of coal ash and harmful element to groundwater environment.
Claims (1)
1. a kind of system enclosure method for oil shale underground in situ exploitation, the closed system involved by this method is by top board
Heat-insulated confining bed, floor spacer confining bed and horizon mining region closing curtain composition；It is characterized in that：Comprise the following steps：
The first, floor spacer confining bed is set at oil shale layer (1) base plate, oil shale in-situ production zone is covered, is opened with level
Exploiting field domain closing curtain is connected to become entirety；
It is to bore a series of fracture grouting hole of quincuncial arrangements on ground for the fracture grouting method of floor spacer confining bed
(6), the grouting serous fluid of adjacent fracture grouting hole (6) mutually goes here and there footpath, and hole depth reaches oil shale layer (1) base plate；
Injected hole (6), using the grouting mode of protrusive, slip casting is carried out in oil shale base plate through oil shale layer (1) base plate, slurry
Liquid pressure more than oil shale in-situ perpendicular to layer reason direction action of pulling stress under, oil shale layer of riving, the splitting road of slurries
Line is in crisscross veiny network, and slurries mutually go here and there footpath in each injected hole, forms floor spacer confining bed；
The 2nd, the heat-insulated confining bed of top board is set at oil shale top plate, oil shale in-situ production zone is covered, it is heat-insulated that top board is set
Confining bed makes slurries in each injected hole mutually go here and there footpath using the method for fracture grouting；
It is to bore a series of fracture grouting hole of quincuncial arrangements on ground for the fracture grouting method of the heat-insulated confining bed of top board
(6), the grouting serous fluid of adjacent fracture grouting hole (6) mutually goes here and there footpath, and hole depth reaches oil shale layer (1) top board；
Injected hole (6), using the grouting mode of protrusive, slip casting is carried out in oil shale top board through oil shale layer (1) top board, slurry
Liquid pressure more than oil shale in-situ perpendicular to layer reason direction action of pulling stress under, oil shale layer of riving, the splitting road of slurries
Line is in crisscross veiny network, and slurries mutually go here and there footpath in each injected hole, forms the heat-insulated confining bed of top board；
Closing mud i.e. fracture grouting slurries (13), insertion one-way valve tube (11) to oil shale are poured into fracture grouting hole (6)
Layer top board, grouting serous fluid (13) to be cleaved is set in one-way valve tube (11), is inserted into slip casting core pipe (12) in one-way valve tube,
Carry out slip casting；When slurry pressure is more than oil shale in-situ vertical stratification direction tension, slurries oil shale layer (1) of riving is gone forward side by side
Enter in crack, form the heat-insulated confining bed of top board (7)；
3rd, closing curtain in horizon mining region is continuous and closed, using the method for osmotic grouting, through exploitation oil shale layer
Base plate, reaches the basal bed of bad hydraulic permeability；
It is to bore a series of single injected holes (6) on ground for the osmotic grouting method of horizon mining region closing curtain construction,
Injected hole (6) depth is reached at oil shale layer base plate, and the grout mixing that injected hole (6) spacing should meet adjacent holes is overlapped,
Continuous and closed horizon mining region closing curtain may finally be formed；When carrying out slip casting to single hole, should be using from bottom to top
The mode of segmenting slip casting, since oil shale base plate, using only tholepin plug (16), carries out segmenting slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611097759.1A CN106703752B (en) | 2016-12-03 | 2016-12-03 | A kind of system enclosure method for oil shale underground in situ exploitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611097759.1A CN106703752B (en) | 2016-12-03 | 2016-12-03 | A kind of system enclosure method for oil shale underground in situ exploitation |
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| CN106703752A true CN106703752A (en) | 2017-05-24 |
| CN106703752B CN106703752B (en) | 2019-04-19 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060716A (en) * | 2017-06-14 | 2017-08-18 | 长春工程学院 | A kind of oil shale underground in situ injection splitting constructing device and construction technology |
| CN107060717A (en) * | 2017-06-14 | 2017-08-18 | 长春工程学院 | A kind of oil shale underground in situ splitting cracking constructing device and construction technology |
| CN107178355A (en) * | 2017-07-14 | 2017-09-19 | 新疆国利衡清洁能源科技有限公司 | Coal underground gasification system and construction method thereof |
| CN107558950A (en) * | 2017-09-13 | 2018-01-09 | 吉林大学 | Orientation blocking method for the closing of oil shale underground in situ production zone |
| CN107605422A (en) * | 2017-10-20 | 2018-01-19 | 吉林大学 | For the combined type packer under high temperature and high pressure condition and packing method |
| CN110159233A (en) * | 2019-06-10 | 2019-08-23 | 中国石油大学(华东) | A method of gas hydrates recovery ratio is improved by artificial fine and close cap rock |
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| CN112112601A (en) * | 2020-09-18 | 2020-12-22 | 西安交通大学 | Closed system for underground in-situ pyrolysis of coal and construction method thereof |
| CN112127868A (en) * | 2020-09-27 | 2020-12-25 | 中国地质大学（北京） | Test device for simulating underground coal gasification and oil shale co-production and test method thereof |
| CN112160738A (en) * | 2020-09-18 | 2021-01-01 | 西安交通大学 | Well arrangement structure for underground in-situ pyrolysis of coal and construction method thereof |
| CN112412430A (en) * | 2020-09-18 | 2021-02-26 | 西安交通大学 | System and method for underground in-situ pyrolysis of coal |
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| CN112412430A (en) * | 2020-09-18 | 2021-02-26 | 西安交通大学 | System and method for underground in-situ pyrolysis of coal |
| CN112160738A (en) * | 2020-09-18 | 2021-01-01 | 西安交通大学 | Well arrangement structure for underground in-situ pyrolysis of coal and construction method thereof |
| CN112112601A (en) * | 2020-09-18 | 2020-12-22 | 西安交通大学 | Closed system for underground in-situ pyrolysis of coal and construction method thereof |
| CN112127868A (en) * | 2020-09-27 | 2020-12-25 | 中国地质大学（北京） | Test device for simulating underground coal gasification and oil shale co-production and test method thereof |
| CN113006795A (en) * | 2021-04-09 | 2021-06-22 | 中国煤炭地质总局勘查研究总院 | Treatment method of sandstone water on top plate of Jurassic coal field |
| CN113006795B (en) * | 2021-04-09 | 2023-10-20 | 中国煤炭地质总局勘查研究总院 | Treatment method of dwarf coal field roof sandstone water |
| CN115306367A (en) * | 2022-08-19 | 2022-11-08 | 陕西省煤田地质集团有限公司 | Method for underground in-situ conversion and economic evaluation of oil-rich coal |
| CN115306367B (en) * | 2022-08-19 | 2023-11-21 | 陕西省煤田地质集团有限公司 | Underground in-situ conversion and economical evaluation method for oil-rich coal |
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