CN106285602A - A kind of carbon dioxide powder for shale gas exploitation melts device for picking and method - Google Patents
A kind of carbon dioxide powder for shale gas exploitation melts device for picking and method Download PDFInfo
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- CN106285602A CN106285602A CN201610700865.8A CN201610700865A CN106285602A CN 106285602 A CN106285602 A CN 106285602A CN 201610700865 A CN201610700865 A CN 201610700865A CN 106285602 A CN106285602 A CN 106285602A
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- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 71
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 title claims abstract description 10
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 8
- 239000000155 melt Substances 0.000 title claims abstract description 4
- 238000000034 method Methods 0.000 title claims description 23
- 238000006253 efflorescence Methods 0.000 claims abstract description 35
- 206010037844 rash Diseases 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 8
- 238000004880 explosion Methods 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000010454 slate Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 32
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005235 decoking Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The carbon dioxide powder that present invention provide for shale gas exploitation melts device for picking, including interconnective terminal control system, high pressure CO2Feed system, transport system, pressure relief devices；Described terminal control system is used for controlling described high pressure CO2Feed system, pressure relief devices；Described high pressure CO2Feed system is used for storing and supplying high pressure CO2Liquid；Described transport system is for by high pressure CO2Liquid transport is to shale reservoir；Described pressure relief devices is for making the high pressure CO being positioned in shale reservoir2Fast pressure relief.The present invention allows high pressure CO2Liquid penetrates into inside shale reservoir, forms inner homogeneous pressure field, off-load the most suddenly, form high pressure gradients, cause the efflorescence of shale near region, far field to rupture in shale crack and hole, and shale gas can automatically separate out and collect.Utilize the present invention to carry out shale gas exploitation, CO can be substantially reduced2Injection pressure, thus cost-effective, and efflorescence and broken shale that shale gas is separated out is the most thorough, substantially increase recovery ratio.
Description
Technical field
The invention belongs to shale gas development field, be specifically related to a kind of CO for shale gas exploitation2Efflorescence production technique.
Background technology
There are abundant shale gas reserves and exploitable deposit in China, can carry out work by means of horizontal well and hydraulic fracturing technology
Industry is developed.But, hydraulic fracturing technology, in addition to success rate is low, is applied to China and does not have sustainable developability.The first
3-4 times of cost Gao Shi U.S. development cost；It two is that water consumption is big, is not suitable for China's shale gas aboundresources water resource and lacks
Block.Exploitation is suitable for China's national situation, sustainable development and has the shale gas of independent intellectual property rights and develop new departure, new technology
There is important strategic importance and economic benefit.The technological core of China's shale gas exploitation is at 3000-4000 meter layer depth
Rock mass in form complicated crack seam net.The target of engineering is intended to improve success rate, reduce production cost, saving water resource.
After China expert completes technology transfer, digests, innovates, still can not form the feelings of the technical matters of applicable China's national situation
Under condition, need the framework breaking through prior art badly, seek new energy-conserving and environment-protective and efficient shale gas production practice.
Currently for shale gas fracturing process, generally based on fracturing.As a whole, horizontal well adds segmentation pressure
Split is that current shale gas develops most widely used mode.The most conventional staged fracturing renovation technique: from the point of view of action mode
Multistage fracturing, expansion type pressure break, hydraulic jetting fracturing, many wells is had to synchronize pressure break etc.；Clear water pressure can be divided into again in terms of pressure break medium
Split, fiber fracturing, carbon dioxide pressure break, nitrogen pressure break, liquified petroleum gas fracturing etc..But no matter select which kind of pressure break mode,
Whole purpose is all to construct effective fracture network, it is thus achieved that bigger network fracture area, to increase recovery ratio and quantum of output.So
And, current fracturing reform depends on greatly the accumulation of experience and on-the-spot testing and debugging repeatedly, and cycle length, cost are high.China's mesh
In front shale gas development block, the yield of decoking masonry dam block meets outside commercial development demand, and remaining major part effect is also
Undesirable.A bite shale gas horizontal well needs water, thousand side's sand incomparably, and frac pressure needs tens up to a hundred MPas, is drilled well and pressure
It is cleaved into this at about 0.8 hundred million 1.0 hundred million yuan.
Summary of the invention
It is an object of the invention to provide a kind of energy-conserving and environment-protective and efficiently for the carbon dioxide efflorescence of shale gas exploitation
Quarrying apparatus and method.
In order to solve the problems referred to above, the present invention provides a kind of carbon dioxide powder for shale gas exploitation to melt device for picking,
Including interconnective terminal control system, high pressure CO2Feed system, transport system, pressure relief devices；Described terminal control system
For controlling described high pressure CO2Feed system, pressure relief devices；Described high pressure CO2Feed system is used for storing and supplying high pressure CO2
Liquid；Described transport system is for by high pressure CO2Liquid transport is to shale reservoir；Described pressure relief devices is used for making to be positioned at shale storage
High pressure CO in Ceng2Fast pressure relief.
Further, described terminal control system and described high pressure CO2Feed system is positioned at top, stratum；Described transport system
It is positioned at shale gas exploitation pit shaft with pressure relief devices；Described high pressure CO2Feed system provides the high pressure CO of pressure 7MPa2Liquid；Institute
State transport system and include CO2Liquid transport pipeline, outlet pipe；Described pressure relief devices includes demolition set, explosion protection system.
Further, described high pressure CO2Feed system and described CO2The upper end of conveying pipe connects, and is provided with the first valve therebetween
Door, can control CO by described terminal control system2Quantity delivered and supply pressure；Described CO2 liquid transport lower end of duct is even
Connect the efflorescence storehouse cut in advance in shale reservoir；It is suitable for reading that outlet pipe lower end connects pit shaft, is provided with the second valve therebetween；Described
First valve, the second valve are check valve, for controlling opening and closing and the flow direction of pipeline；Described first valve only allows CO2From
Described high pressure CO2Feed system flows to efflorescence storehouse；Described second valve only allows gas to flow out from pit shaft.
Further, described demolition set is the instantaneous ignition of external control system radio control circuit, and described explosion protection system is
Dual rupture disks, to improve the stability of pressurization, ruptures opportunity by control that the pressure reduction between burst disk controls burst disk.
The present invention also provides for the recovery method of a kind of described quarrying apparatus, comprises the steps:
A) described terminal control system controls high pressure CO2Feed system is slowly injected in shale reservoir by transport system
High pressure CO2Liquid；
B) reach to stop injecting CO after design requires2；
C) control, by terminal control system, the high pressure CO that pressure relief devices makes to be positioned in shale reservoir2Fast pressure relief；
Repeat step a)-c)；
D) by transport system, shale gas is expelled to ground.
Further, described step a) specifically includes:
1) described terminal control system controls high pressure CO2Feed system is dug in shale reservoir in advance by transport system
The efflorescence storehouse gone out is slowly injected into high pressure CO2Liquid；
2) described terminal control system controls CO according to design2Injection rate and injection length, monitor injection pressure.
Further, described step b) specifically includes:
1) described terminal control system determines injection length and injection rate according to reservoir characteristics；
2) reach to stop injecting CO2 after design requires；
3) the unnecessary CO in pit shaft is pumped2, open the valve of described outlet pipe, make pit shaft and atmosphere.
Further, described step c) specifically includes:
1) terminal control system ignites demolition set；
2) burst disk is opened, the rapid release in efflorescence storehouse.
Further, described step d) specifically includes:
1) shale gas of efflorescence and burst region runs through discharge duct discharge；
2) for preventing pit shaft from blocking, release should rinse pit shaft with water after completing as early as possible, is washed out by the slate flour in pit shaft.
Relative to prior art, the present invention has a following technique effect:
With existing CO2Fracturing technique is different, the method for present invention proposition the direct fracturing of non-used gas high pressure, but allows
High pressure CO2Liquid penetrates into inside shale reservoir, forms inner homogeneous pressure field, then in specific pressure in shale crack and hole
Unexpected off-load under power, forms high pressure gradients, causes the efflorescence of shale near region, far field to rupture.The shale of efflorescence is tens microns of amounts
Level, can be transported to ground by air blast, and shale gas also can automatically separate out and collect.Repeat above-mentioned to add-uninstall process, can effectively expand
Big efflorescence fracturing scope.Utilize the method to carry out shale gas exploitation, CO can be substantially reduced2Injection pressure, it is only necessary to about
About 7MPa, thus cost-effective, and efflorescence and broken shale that shale gas is separated out is the most thorough, substantially increase and gather
Rate.
Accompanying drawing explanation
Fig. 1 is high pressure CO of the present invention2The seepage flow loading procedure schematic diagram injected；
Fig. 2 is the shale reservoir schematic diagram after release efflorescence；
Fig. 3 a is the photo of the front shale block of shale efflorescence experiment on a small scale；
Fig. 3 b is the photo of shale powder after small-scale shale efflorescence is tested.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that do not conflicting
In the case of, the embodiment in the application and the feature in embodiment can mutual combination in any.
Embodiment one:
As shown in Figure 1-2, the present invention provides a kind of carbon dioxide powder for shale gas exploitation to melt device for picking, including phase
The terminal control system 1 that connects, high pressure CO2Feed system 2, transport system, pressure relief devices；Terminal control system 1 is used for controlling
High pressure CO processed2Feed system 2, pressure relief devices；High pressure CO2Feed system 2 is used for storing and supplying high pressure CO2Liquid；Transport system
For by high pressure CO2Liquid transport is to shale reservoir 9；Pressure relief devices is for making the high pressure CO being positioned in shale reservoir 92Quickly unload
Pressure.
Terminal control system 1 and high pressure CO2Feed system 2 is positioned at top, stratum；Transport system and pressure relief devices are positioned at page
In rock gas exploitation pit shaft 6；High pressure CO2Feed system 2 provides the high pressure CO of pressure 7MPa2Liquid；Transport system includes CO2Liquid
Conveying pipe 4, outlet pipe 5；Pressure relief devices includes demolition set and explosion protection system 7.
High pressure CO2Feed system 2 and CO2The upper end of conveying pipe connects, and is provided with the first valve 3 therebetween, can pass through terminal control
System 1 processed controls CO2Quantity delivered and supply pressure；CO2Connection shale reservoir 9 in liquid transport pipeline 4 lower end cuts in advance
Efflorescence storehouse；It is suitable for reading that outlet pipe 5 lower end connects pit shaft 6, is provided with the second valve 13 therebetween；First valve the 3, second valve 13 is equal
For check valve, it is used for controlling opening and closing and the flow direction of pipeline；First 3, valve allows CO2From high pressure CO2Feed system 2 is to efflorescence storehouse
Flowing；Second 13, valve allows gas to flow out from pit shaft 6.
Demolition set is the instantaneous ignition of external control system radio control circuit, and explosion protection system is dual rupture disks, to improve
The stability of pressurization, ruptures opportunity by control that the pressure reduction between burst disk controls burst disk.
Utilize the CO that shale reservoir 9 is carried out by the present invention2The method of efflorescence exploitation: beat vertical pit shaft 6 in superstratum 8,
Fetching water in shale reservoir 9 horizontal well or Vertical Well, lay the said equipment, each several part notes sealing, and circuit to be connected firm and take
Corresponding protective reinforcing measure；Open CO2The first valve 3 on liquid transport pipeline 4, controls height by terminal control system 1
Pressure CO2Feed system 2 is to injecting CO between efflorescence storehouse 12 and burst disk2, control CO according to design2Injection rate and injection length, monitoring
Injection pressure；Determine injection length and injection rate according to reservoir characteristics, reach to stop injecting CO after design requires2, and pump well
Unnecessary CO in cylinder 62, the second valve 13 opened on outlet pipe 5 makes pit shaft 6 and atmosphere；By terminal control system 1
Igniting demolition set, make burst disk open, the rapid release in efflorescence storehouse 12, the shale near efflorescence storehouse 12 is sent out due to high stress gradients
Fecula, the most remote region also can occur rupturing in various degree due to STRESS VARIATION；Repeat to add-uninstall process, rupture zone
Crack can expand effective efflorescence scope further；The shale gas of efflorescence and burst region runs through discharge duct and discharges；Due to
Atomizing, the shale gas recovery ratio in efflorescence district 10 will be greatly improved, and also complete the process of pressure break, in shale reservoir 9 simultaneously
Shale gas can ooze out along the fissure channel of rupture zone, thus obtain stable air-flow；For preventing pit shaft 6 from blocking, release completes
After should as early as possible with water rinse pit shaft 6, the slate flour in pit shaft 6 is washed out.
As shown in Figure 1-2, the present embodiment is horizontal shale gas well, the size of conveying pipe and size, CO2Pressure and note
Enter amount can according to scene need depending on.CO2Pressure takes 7MPa, pressure precision 1%, and burst disk uses double aluminium plate device, if P1 and
P2 is respectively CO in efflorescence storehouse2CO between pressure and double-layer explosion-proof sheet2Pressure.Two set burst disk materials and physical dimension are complete
Unanimously, the broken plate pressure (3.5Mpa) of burst disk is the most stable.During pressurization can synchronous boost, as P1-P2 < 3.5Mpa and P2
< during 3.5Mpa, i.e. P1-3.5Mpa < P2 < 3.5Mpa, it is in steady statue；When P1-P2 < during 3.5Mpa and P2=3.5Mpa, i.e.
P1 < 7Mpa, and P2=3.5Mpa, outside aluminium sheet first destroys, and then, inner side aluminium sheet is in the external and internal pressure difference condition close to 7Mpa
Lower destruction.Meanwhile, using explosion to realize the purpose of quick relief, explosion response time is 20～30ms.When the pressure of reservoir is protected
Holding after 7MPa, it is believed that the shale near efflorescence storehouse is substantially saturated, after fast pressure relief, shale is sent out due to high-ground stress difference effect
Fecula, far field can produce fragment and crack (Fig. 2).Utilize special drilling well equipment replacement burst disk, and repeat above-mentioned pressurization-unload
Load process, progressively expands efflorescence fracturing scope.Each instantaneous release has the ejection of partial page rock dust, inflates in time in pit shaft 6
Shale powder is gone out, or utilize high pressure dust-absorbing system by shale powder sucking-off, with blockage resisting.Shale after efflorescence and the page of rupture zone
Rock can separate out a large amount of shale gas, and atomizing makes shale gas exploitation the most thorough.Efflorescence storehouse 12 is expanded by the strip in Fig. 1
For the ellipticity in Fig. 2.
Pilot experiments:
As it is shown on figure 3, be placed in the steel pipe of 95mm diameter by shale block (Fig. 3 a), steel pipe one end is closed, and the other end is anti-
Quick-fried, then toward liquid CO injecting 2.5kg in cylinder2, standing a period of time allows the CO in shale block2Saturated, explosive cartridge one end is drawn
Burst disk is opened by bursting charge, instantaneous release.Experimental result is: shale block becomes the fine powder (Fig. 3 b) about 100 mesh, explanation
Utilize CO2It is feasible technically that powdering techniques carries out shale gas exploitation.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. one kind melts device for picking for the carbon dioxide powder of shale gas exploitation, it is characterised in that: include interconnective terminal
Control system, high pressure CO2Feed system, transport system, pressure relief devices；Described terminal control system is used for controlling described high pressure CO2
Feed system, pressure relief devices；Described high pressure CO2Feed system is used for storing and supplying high pressure CO2Liquid；Described transport system is used
In by high pressure CO2Liquid transport is to shale reservoir；Described pressure relief devices is for making the high pressure CO being positioned in shale reservoir2Quickly unload
Pressure.
2. quarrying apparatus as claimed in claim 1, it is characterised in that: described terminal control system and described high pressure CO2Supply system
System is positioned at top, stratum；Described transport system and pressure relief devices are positioned at shale gas exploitation pit shaft；Described high pressure CO2Feed system
The high pressure CO of pressure 7MPa is provided2Liquid；Described transport system includes CO2Liquid transport pipeline, outlet pipe；Described release sets
For including demolition set, explosion protection system.
3. quarrying apparatus as claimed in claim 2, it is characterised in that:
Described high pressure CO2Feed system and described CO2The upper end of conveying pipe connects, and is provided with the first valve therebetween, can be by described
Terminal control system controls CO2Quantity delivered and supply pressure；Described CO2 liquid transport lower end of duct connects in shale reservoir pre-
The efflorescence storehouse first cut；It is suitable for reading that outlet pipe lower end connects pit shaft, is provided with the second valve therebetween；Described first valve, second
Valve is check valve, for controlling opening and closing and the flow direction of pipeline；Described first valve only allows CO2From described high pressure CO2Supply
System flows to efflorescence storehouse；Described second valve only allows gas to flow out from pit shaft.
4. quarrying apparatus as claimed in claim 3, it is characterised in that:
Described demolition set is the instantaneous ignition of external control system radio control circuit, and described explosion protection system is dual rupture disks, with
Improve the stability of pressurization, rupture opportunity by control that the pressure reduction between burst disk controls burst disk.
5. the recovery method of the quarrying apparatus as described in claim 1-4, it is characterised in that comprise the steps:
A) described terminal control system controls high pressure CO2Feed system is slowly injected into high pressure by transport system in shale reservoir
CO2Liquid；
B) reach to stop injecting CO after design requires2；
C) control, by terminal control system, the high pressure CO that pressure relief devices makes to be positioned in shale reservoir2Fast pressure relief；
Repeat step a)-c)；
D) by transport system, shale gas is expelled to ground.
6. recovery method as claimed in claim 5, it is characterised in that described step a) specifically includes:
1) described terminal control system controls high pressure CO2Feed system is cut in shale reservoir in advance by transport system
Efflorescence storehouse is slowly injected into high pressure CO2Liquid；
2) described terminal control system controls CO according to design2Injection rate and injection length, monitor injection pressure.
7. recovery method as claimed in claim 6, it is characterised in that described step b) specifically includes:
1) described terminal control system determines injection length and injection rate according to reservoir characteristics；
2) reach to stop injecting CO2 after design requires；
3) the unnecessary CO in pit shaft is pumped2, open the valve of described outlet pipe, make pit shaft and atmosphere.
8. recovery method as claimed in claim 7, it is characterised in that described step c) specifically includes:
1) terminal control system ignites demolition set；
2) burst disk is opened, the rapid release in efflorescence storehouse.
9. recovery method as claimed in claim 7, it is characterised in that described step d) specifically includes:
1) shale gas of efflorescence and burst region runs through discharge duct discharge；
2) for preventing pit shaft from blocking, release should rinse pit shaft with water after completing as early as possible, is washed out by the slate flour in pit shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700865.8A CN106285602B (en) | 2016-08-22 | 2016-08-22 | It is a kind of for shale gas exploitation carbon dioxide powder melt device for picking and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700865.8A CN106285602B (en) | 2016-08-22 | 2016-08-22 | It is a kind of for shale gas exploitation carbon dioxide powder melt device for picking and method |
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| CN106285602B CN106285602B (en) | 2019-04-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302324A (en) * | 2018-04-02 | 2018-07-20 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Liquid carbon dioxide energization frac system and technological process |
| CN109751029A (en) * | 2017-11-01 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of method of deep layer shale gas pressure break |
| CN113338889A (en) * | 2021-07-05 | 2021-09-03 | 中国矿业大学 | Shale gas production promotion method based on combination of combustion-explosion fracturing and hydraulic fracturing |
| CN114112714A (en) * | 2021-12-08 | 2022-03-01 | 中国科学院武汉岩土力学研究所 | Supercharging device for rock and concrete material high-pressure unloading cracking test |
| CN114183118A (en) * | 2021-12-31 | 2022-03-15 | 石家庄铁道大学 | Infiltration mining method and device for infiltration-increasing area of low-permeability sandstone uranium ore and terminal equipment |
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| CN114112714A (en) * | 2021-12-08 | 2022-03-01 | 中国科学院武汉岩土力学研究所 | Supercharging device for rock and concrete material high-pressure unloading cracking test |
| CN114183118A (en) * | 2021-12-31 | 2022-03-15 | 石家庄铁道大学 | Infiltration mining method and device for infiltration-increasing area of low-permeability sandstone uranium ore and terminal equipment |
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