CN107420077A - One kind is based on high energy CO2The shale oil recovery method and device of fluid fracturing - Google Patents
One kind is based on high energy CO2The shale oil recovery method and device of fluid fracturing Download PDFInfo
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- CN107420077A CN107420077A CN201710794097.1A CN201710794097A CN107420077A CN 107420077 A CN107420077 A CN 107420077A CN 201710794097 A CN201710794097 A CN 201710794097A CN 107420077 A CN107420077 A CN 107420077A
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- 239000012530 fluid Substances 0.000 title claims abstract description 41
- 239000003079 shale oil Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000004058 oil shale Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000010891 electric arc Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 31
- 239000003921 oil Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 229930195733 hydrocarbon Natural products 0.000 claims description 5
- 150000002430 hydrocarbons Chemical class 0.000 claims description 5
- 238000000197 pyrolysis Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 238000012856 packing Methods 0.000 claims 1
- 239000003208 petroleum Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
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- 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
-
- 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
- E21B36/008—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using chemical heat generating means
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- 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
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
-
- 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
-
- 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)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses one kind to be based on high energy CO2The shale oil recovery method and device of fluid fracturing, mainly including fracturing unit truck, oil extraction system, ground oil gas treating device, power well, producing well, packer, perforating gun, fracturing string, resistance wire, arc generator etc..Fracturing unit truck is by the liquid CO in holding vessel2It is pressed into by power well in fracturing string, packer closing fracturing string simultaneously pressurizes, and ground controls resistance wire to the CO in fracturing string2Heating, when reaching certain temperature and pressure in fracturing string, perforating gun is opened and projects high energy CO2Fluid, arc generator produces electric arc to high energy CO at perforation muzzle2Further fill energy, high energy CO2Fluid carries out pressure break to oil shale and is pyrolyzed oil shale, and oil gas is brought to producing well enrichment along crack, and oil extraction system adopts away these petroleum resourceses by producing well.Split mining method and device compared to existing hydraulic pressure, the present invention has the advantages of simple saving water resource, environmental protection, process, energy-controllable, high oil displacement efficiency.
Description
Technical field
The present invention relates to shale oil production technique field, and high energy CO is based in particular to one kind2The page of fluid fracturing
Shale oil recovery method and device.
Background technology
The world today, although Recoverable oil and gas reserves and sustained production increase, demand increase more powerful, oil gas supply
It is difficult to the demand for supporting economic growth, supply falls short of demand for oil.Meanwhile the change of international geopolitics situation also influences oil gas confession
Should.Therefore, in order to ensure the notice of the energy is gradually focused on unconventional petroleum resources by oil gas supply, countries in the world.Again
Before raw energy substitution fossil fuel, unconventionaloil pool exploration and development turns into the inexorable trend of globe petroleum industry development.
Shale oil provides new approach as important unconventional petroleum resources to alleviate China's problem of energy crisis.
Shale oil refers to petroleum resources contained in shale series of strata based on shale, including the oil in mud shale hole and crack,
Also include mud shale series of strata in fine and close carbonatite or clastic rock adjacent bed and interlayer in petroleum resources, have have a very wide distribution,
The features such as stock number is big, the stable yields cycle is long, has and be born from storage, air free water interface, large-area accumulation, low-porosity, hyposmosis certainly
The features such as rate, typically without natural production capacity, it is necessary to could obtain effective capacity by means of horizontal well and fracturing technique.At present, waterpower
Fracturing technique be exploit shale oil mainstream technology, but all the time there is water resources consumption greatly and pressure break caused by pollute etc. environmental protection
Problem.Although China's oil shale resources are abundant, be mainly distributed on Song-liao basin, Ordos Basin and the Junggar Basin and its
The area of the water shortages such as Mountain Areas of Southern.Hydraulic fracturing not only expends great lot of water resources, and chemical substance can be impurely in fracturing fluid
Lower water layer.Hydraulic fracturing technology has been prohibitted the use of to open by legislation for the area such as the protection to water table geology, Europe
Adopt shale oil.The viscosity of shale oil is big, and water can not dissolve each other, and merely increasing crack in shale with hydraulic fracturing can not substantially carry
The production efficiency of high shale oil.In addition, shale is a kind of sedimentary rock, complicated component, mainly deposited by clay through pressure and temperature
The rock formed is spent, the joint with thin laminated or thin slice stratiform, after hydraulic fracturing, shale meeting water swelling causes pressure break
Crack closure.In view of this, the problems to be run into when solving water Splitting Method exploitation shale oil, it is necessary to consider from multi-angle
Shale oil production technique is reformed, it is proposed that one kind is based on high energy CO2The shale oil recovery method and device of fluid fracturing.
The content of the invention
It is an object of the invention to overcome prior art defect, the present invention provides one kind and is based on high energy CO2Fluid fracturing
Shale oil recovery method and device.
To achieve the above object, the present invention uses following technical scheme：One kind is based on high energy CO2The shale oil of fluid fracturing
Recovery method, it comprises the following steps：
S1：Top earth's surface in horizontal shale oil reservoir of the buried depth no more than 2500 meters is produced by the distribution of hexagon shape
The distance between well, each producing well is 600~1000m, and power well is arranged at the geometric center in the region between producing well,
The distance of power well and producing well is also 600~1000m.
S2：By the liquid CO in holding vessel2It is transported in fracturing unit truck and carries out system boost, in whole manifold of ground and equipment
Basic pressure is established in passage；By power well, fracturing unit truck is by liquid CO2It is pressed into by main pipeline in fracturing string；In addition, pressure break
A small amount of water is pressed into fracturing string by car by secondary duct again；When being full of CO in fracturing string2During with the mixture of water, packer is close
Close, then by CO2Pressurizeed with the mixture of water；By surface power supply, the CO by the resistance wire in fracturing string wall to inside2And water
Mixture heating；When reaching certain pressure intensity and temperature in fracturing string, perforating gun is opened and connects electric arc at perforation muzzle
Generating means, electric arc heat the jet for making fluid become high energy to oil shale progress pressure break again to the fluid of ejection again.
S3：The high energy CO projected in perforating gun2The wax and asphalitine in area, oil gas caused by pyrolysis near fluid dissolving
Along crack with high energy CO2Flowing toward producing well be enriched with, oil, gas, steam and the non-hydrocarbon gases of enrichment flow into production together
In well, floor-treating device is delivered to by producing well, oil, gas and water separation are carried out, afterwards again by the oil isolated, gas product
It is respectively delivered to corresponding processing unit (plant) and carries out deep processing.
Preferably, producing well arranges that its spacing is 600~1000m, and power well is arranged in production on ground by regular hexagon
At the geometric center for the hexagon that well surrounds；Power well and producing well driving arrive oil shale layer, the oil shale thickness of a pressure break
In 12~16m, the pressure of the system boost is between 1.5~3.0MPa, the CO2With CO in the mixture of water2With the ratio of water
Example is 15：1, CO after the packer is closed2It is described and the pressure after the mixture repressurization of water is between 40~60MPa
Fracturing string internal temperature reaches 600 DEG C when perforating gun is opened.
One kind is based on high energy CO2The shale oil quarrying apparatus of fluid fracturing, it mainly includes fracturing unit truck, packer, pressure break
Tubing string, resistance wire, perforating gun and arc generator.
The fracturing unit truck passes through pipeline and liquid CO2Holding vessel is connected, and the fracturing unit truck passes through main pipeline and secondary duct
It is connected with packer, the packer is arranged on fracturing string end to seal fracturing string, the post jamb of the fracturing string
Resistance wire is inside disposed with, the perforating gun is loaded on fracturing string and with being communicated inside fracturing string, the arc generating device
It is arranged at the muzzle of perforating gun.
Preferably, resistive heater is disposed with the fracturing string wall, resistance wire is controlled by the control system on ground, by
Ground power supply system is powered.
Preferably, the length of fracturing string is between 200~300m.
Preferably, perforating gun is diagonally-installed is axially formed 45 ° of angles, fracturing string on fracturing string and with fracturing string
Axis direction installs 60~120 layers of perforating gun, and for the spacing between every layer of perforating gun between 2.5~3m, every layer of perforating gun includes 3
Perforating gun of~6 radial equipartitions on fracturing string.
Preferably, arc generator is installed, arc generator is controlled by the control system on ground, by ground at perforation muzzle
Electric power system is powered.
The present invention has following distinguishing feature：
1. the present invention uses high energy CO2Fluid carries out pressure break to oil shale, only with minimal amount of water auxiliary high-energy CO2Fluid
Fracturing work is carried out, can greatly reduce the consumption in fracturing process to water resource；CO2It is nonpolar molecule, compatibility is good, right
Water sensitivity, acid-sensitive or the quick property stratum of salt are applicable, and need not pour into other fracturing fluids in fracturing process to reservoir, after pressure break
The measures such as discharge opeing are not required to, to reservoir damage very little, stratum will not be polluted, be advantageous to environmental protection.
2. the present invention is controlled by the way of surface power supply to the resistance wire in well and arc generator, fracturing process
Middle whole device energy-controllable, the CO in fracturing string is made using electrically heated method2With the mixture pressure of water again drastically
Increase, can remove traditional cumbersome uncontrollable multistage pressuring machine process from, Resistant heating makes CO2Become high-energy fluid, make
Water becomes the vapor of high energy, and arc generating device adds at perforating muzzle again when the high-energy fluid of mixing projects from perforating gun
Heat, the heat in these fluids can make the wax and asphaltene dissolution in neighbouring area, release the blocking in oil reservoir duct, improve stratum
The physical property and fluidised form of fluid, accelerate flowing velocity of the crude oil to shaft bottom, improve the oil displacement efficiency of reservoir, repeatedly filled the fluid of energy
The crack of diffusion type is easily formed in oil shale pressure break, is not influenceed by surrounding confined pressure, high-temperature steam and CO2Split along pressure break
Gap is pyrolyzed oil shale, and oil gas caused by pyrolysis can be with high energy CO2Flowing take out of, in addition, high energy CO2Fluid fracturing is used to solve
Stifled, its effect is not influenceed by blocking mechanism.
3. producing well of the present invention is arranged on ground by regular hexagon, power well is arranged in the geometric center of regular hexagon, raw
Production well integral arrangement is for example cellular, and a producing well can adopt the petroleum resources that three power well pressure breaks go out, and a power well can
Think six producing wells enrichment petroleum resourceses, perforating gun it is diagonally-installed on fracturing string and with fracturing string shape angle at 45 °,
There is notable displacement in the crack that pressure break goes out in the horizontal direction, in high energy CO2Under the driving effect of fluid, petroleum resources can be more efficient
Ground is enriched with toward producing well.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the schematic diagram of the preferred embodiment of the present invention；
Fig. 2 is the position schematic diagram of power well and producing well；
Fig. 3 is pressure break schematic diagram；
Fig. 4 is the sectional view of fracturing string and perforating gun.
In figure：1 is fracturing unit truck, and 2 be oil extraction system, and 3 be ground oil gas treating device, and 4 be power well, and 5 be producing well, 6
It is packer, 7 be perforating gun, and 8 be fracturing string, and 9 be resistance wire, and 10 be arc generator.
Embodiment
In order to more fully understand the technology contents of the present invention, 1-4 and embodiment are to technology of the invention below in conjunction with the accompanying drawings
Scheme is described further and illustrated.
One kind is based on high energy CO2The shale oil recovery method of fluid fracturing, comprises the following steps：
Step 1：Earth's surface at horizontal or inclination angle above oil shale layer of the smaller and buried depth no more than 2800 meters presses positive six side
Shape located production wells, integral layout is in cellular, the arrangement power well at the geometric center in region between producing well；
Step 2：Producing well and power well drilling are into oil shale layer, by power well, by fracturing string (8), packer
(6), the fracturing unit such as perforating gun (7), arc generating device (10) is sent to specified fracture zone, subsurface fracture equipment and ground
Equipment is connected by main pipeline with secondary duct；
Step 3：Liquid CO in holding vessel2Be transported in fracturing unit truck (1) and carry out system boost, in whole manifold of ground and
Basic pressure is established in device channels, a small amount of water is pressed into fracturing string (8) by fracturing unit truck (1) by secondary duct again；When pressure break pipe
CO is full of in post (8)2During with the mixture of water, packer (6) is closed, then by CO2Pressurizeed with the mixture of water；
Step 4：By surface power supply, the CO by the resistance wire (9) in fracturing string (8) wall to inside2With the mixing of water
Thing heats；When reaching certain pressure intensity and temperature in fracturing string (8), perforating gun (7) is opened and connects electric arc at perforation muzzle
Generating means (10), electric arc heats again to the fluid of injection again makes it become the jet of high energy and then press oil shale
Split；
Step 5：The inner high energy CO projected of perforating gun (7)2The wax and asphalitine in area, pyrolysis produce near fluid dissolving
Oil gas along crack with high energy CO2Flowing toward producing well (5) be enriched with, oil, gas, steam and the non-hydrocarbon gases of enrichment are together
Flow into producing well (5), oil, gas, steam and non-hydrocarbon gases are delivered to by ground oil by producing well (5) oil extraction system (2)
Flash Gas Compression Skid System (3), oil, gas and water separation are carried out, and then the oil isolated, gas product are respectively delivered to process accordingly
Device carries out deep processing.
One kind is based on high energy CO2The specific work process of the shale oil quarrying apparatus of fluid fracturing is as follows：In holding vessel
Liquid CO2It is transported in fracturing unit truck (1) and carries out system boost, basic pressure is established in whole manifold of ground and device channels；
By power well (4), fracturing unit truck (1) is by liquid CO2By in main pipeline press-in fracturing string (8)；In addition, fracturing unit truck (1) again will
A small amount of water is pressed into fracturing string (8) by secondary duct；When being full of CO in fracturing string2During with the mixture of water, packer (6) is close
Close, then by CO2Pressurizeed with the mixture of water；By surface power supply, by the resistance wire (9) in fracturing string (8) wall to inside
CO2Heated with the mixture of water；When reaching certain pressure intensity and temperature in fracturing string (8), perforating gun (7) is opened and connected and penetrates
Arc generating device (10) at the muzzle of hole, electric arc heat the jet for making fluid become high energy to oily page again to the fluid of ejection again
Rock carries out pressure break.The inner high energy CO projected of perforating gun (7)2The wax and asphalitine in the neighbouring area of fluid dissolving, caused by pyrolysis
Oil gas is along crack with high energy CO2Flowing toward producing well (5) be enriched with, oil, gas, steam and the non-hydrocarbon gases of enrichment flow together
Enter in producing well (5), ground oil gas treating device (3) is delivered to by producing well (5), carry out oil, gas and water separation, afterwards, then
The oil isolated, gas product are respectively delivered to corresponding processing unit (plant) and carry out deep processing.
Described above is presently preferred embodiments of the present invention, is not intended to limit the invention, do not depart from spirit of the invention and
On the premise of scope, various changes and modifications of the present invention are possible, these changes and improvements should be included in the present invention protection it
It is interior.The claimed scope of the invention is defined by appended claims and coordinate.Meanwhile although more use herein
Fracturing unit truck (1), oil extraction system (2), ground oil gas treating device (3), power well (4), producing well (5), packer (6), perforation
The terms such as rifle (7), fracturing string (8), resistance wire (9), arc generator (10), but it is not precluded from the possibility using other terms
Property.It is used for the purpose of more easily describing and explaining the essence of the present invention using these terms；It is construed as any one
Additional limitation is all disagreed with spirit of the present invention.
Claims (7)
1. one kind is based on high energy CO2The shale oil recovery method of fluid fracturing, it is characterised in that comprise the following steps：
S1：Top earth's surface in horizontal shale oil reservoir of the buried depth no more than 2500 meters is distributed producing well by hexagon shape, often
The distance between individual producing well is 600~1000m, and power well, power are arranged at the geometric center in the region between producing well
The distance of well and each producing well is also 600~1000m；
S2：Liquid CO in holding vessel2It is transported in fracturing unit truck and carries out system boost, in whole manifold of ground and device channels
Establish basic pressure；By power well, fracturing unit truck is by liquid CO2It is pressed into by main pipeline in fracturing string；In addition, fracturing unit truck again will
A small amount of water is pressed into fracturing string by secondary duct；When being full of CO in fracturing string2During with the mixture of water, packer is closed, then
By CO2Pressurizeed with the mixture of water；By surface power supply, the CO by the resistance wire in fracturing string wall to inside2With the mixing of water
Thing heats；When reaching certain pressure intensity and temperature in fracturing string, perforating gun is opened and connects electric arc at perforation muzzle and fills
Put, electric arc heats the jet for making fluid become high energy to oil shale progress pressure break again to the fluid of ejection again；
S3：The high energy CO projected in perforating gun2Fluid dissolving nearby area wax and asphalitine, oil gas caused by pyrolysis along
Crack is with high energy CO2Flowing be enriched with toward producing well, oil, gas, steam and the non-hydrocarbon gases of enrichment are flowed into producing well together,
Floor-treating device is delivered to by producing well, carries out oil, gas and water separation, afterwards, then the oil isolated, gas product is distinguished
It is transported to corresponding processing unit (plant) and carries out deep processing.
2. high energy CO is based on according to one kind described in claim 12The shale oil recovery method of fluid fracturing, it is characterised in that
Producing well arranges that its spacing is 600~1000m, and power well is arranged in the hexagon that producing well surrounds on ground by regular hexagon
Geometric center at；Power well and producing well driving arrive oil shale layer, and the oil shale thickness of a pressure break is described in 12~16m
The pressure of system boost is between 1.5~3.0MPa, the CO2With CO in the mixture of water2Ratio with water is 15：1, it is described
CO after packer is closed2And the pressure after the mixture repressurization of water, between 40~60MPa, the perforating gun is pressed when opening
Split tubing string internal temperature and reach 600 DEG C.
3. one kind is based on high energy CO2The shale oil quarrying apparatus of fluid fracturing, it is characterised in that mainly including fracturing unit truck, packing
Device, fracturing string, resistance wire, perforating gun and arc generator；The fracturing unit truck passes through pipeline and liquid CO2Holding vessel is connected
Logical, the fracturing unit truck is connected by main pipeline and secondary duct with packer, the packer installed in fracturing string end with
Seal fracturing string, be disposed with resistance wire in the post jamb of the fracturing string, the perforating gun loaded on fracturing string and with pressure
Split and communicated inside tubing string, the arc generating device is arranged at the muzzle of perforating gun.
4. a kind of according to claim 3 be based on high energy CO2The shale oil quarrying apparatus of fluid fracturing, it is characterised in that institute
State and resistive heater is disposed with fracturing string wall, resistance wire is controlled by the control system on ground, is carried out by ground power supply system
Power supply.
5. a kind of according to claim 3 be based on high energy CO2The shale oil quarrying apparatus of fluid fracturing, it is characterised in that pressure
The length of tubing string is split between 200~300m.
6. a kind of according to claim 3 be based on high energy CO2The shale oil quarrying apparatus of fluid fracturing, it is characterised in that penetrate
Hole rifle is diagonally-installed to be axially formed 45 ° of angles on fracturing string and with fracturing string, and fracturing string axis direction installation 60~
120 layers of perforating gun, between 2.5~3m, every layer of perforating gun exists the spacing between every layer of perforating gun comprising 3~6 radial equipartitions
Perforating gun on fracturing string.
7. a kind of according to claim 3 be based on high energy CO2The shale oil quarrying apparatus of fluid fracturing, it is characterised in that penetrate
Arc generator is installed, arc generator is controlled by the control system on ground, is powered by ground power supply system at the muzzle of hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710794097.1A CN107420077A (en) | 2017-09-06 | 2017-09-06 | One kind is based on high energy CO2The shale oil recovery method and device of fluid fracturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710794097.1A CN107420077A (en) | 2017-09-06 | 2017-09-06 | One kind is based on high energy CO2The shale oil recovery method and device of fluid fracturing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022021A (en) * | 2020-01-02 | 2020-04-17 | 吉林大学 | Oil shale in-situ heating method for coping with thermal expansion characteristics of oil shale formation |
| US11994009B2 (en) | 2020-03-31 | 2024-05-28 | Saudi Arabian Oil Company | Non-explosive CO2-based perforation tool for oil and gas downhole operations |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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