CN108331569A - A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio - Google Patents
A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio Download PDFInfo
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- CN108331569A CN108331569A CN201810209437.4A CN201810209437A CN108331569A CN 108331569 A CN108331569 A CN 108331569A CN 201810209437 A CN201810209437 A CN 201810209437A CN 108331569 A CN108331569 A CN 108331569A
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- 230000001186 cumulative effect Effects 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 239000002360 explosive Substances 0.000 claims abstract description 26
- 238000005474 detonation Methods 0.000 claims abstract description 15
- 230000037452 priming Effects 0.000 claims abstract description 15
- 230000009172 bursting Effects 0.000 claims description 2
- 239000003999 initiator Substances 0.000 abstract description 10
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 17
- 238000004880 explosion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
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- 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)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio, including priming device and air transporting arrangement, priming device includes energy-gathering device, detonation chain and initiator, energy-gathering device includes the middle energy gathering cap for vertically projecting explosive charge energy centralization outward, and middle energy gathering cap is the paraboloid of revolution of outward opening.Compared with prior art, due to the cumulative action of middle energy gathering cap, the shale in explosive fracturing area is squeezed from spatial vertical orientation, crackle is formed through rapidly the shale zone of fracture, the specific surface area for increasing shale, to effectively increase the parsing rate and its recovery ratio of shale gas.
Description
Technical field
The present invention relates to the device for increasing shale gas recovery ratio, more particularly to a kind of paraboloid of revolution cumulative pressure break increases page
The device of rock gas recovery ratio.
Background technology
Shale gas is a kind of emerging clear energy sources, because its large storage capacity, exploitation receive much attention due to long the features such as in period.However
As gas storage carrier shale body because its Natural porosity it is small, permeability is low, and 95% shale gas well is needed through artificial fracturing
Mode increase shale body permeability, can have commercial mining value.
Currently, the method for artificial fracturing includes mainly two classes：When hydraulic fracturing method, second is that foam fracturing method.Water
It forces cracking method and mainly achievees the purpose that fracturing rock stratum by injecting highly pressurised liquid into drilling.According to specific fracturing technology,
Hydraulic fracturing method includes three kinds of multistage fracturing, riverfrac treatment, hydraulic jetting fracturing etc..Multistage fracturing is to utilize ball sealer or limit
Flow Technique separates the technology that reservoir different layers position carries out staged fracturing.Riverfrac treatment is to utilize the induction production of a large amount of clear water injection stratum
The fracturing technique in raw water conservancy diversion crack.Hydraulic jetting fracturing is to carry sand body using high speed and high-pressure fluid to carry out perforation and open to split
The fracturing technique of seam.Foam fracturing method mainly reaches the mesh of fracturing rock stratum by injecting the liquid gas mixture of high pressure into drilling
's.According to the difference of gas componant, foam fracturing method can be divided into nitrogen foam pressure break and carbon dioxide foaming pressure break etc. two
Kind.There is the shortcomings that being difficult to overcome in the fracturing process of rammell in hydraulic fracturing method and foam fracturing method：First, pressure break
A large amount of chemical agents are equipped in liquid, it is big to formation damage；Second is that after the perforation of pressure break later stage major fracture, the leakage of fracturing fluid compared with
It is serious；Third, the anti-row of fracturing fluid is slower.Most important, the occurrence form of shale gas is based on adsorbed gas, only by broken
Broken method increases the specific surface area of shale body, could increase the parsing amount of adsorbed gas, and above-mentioned two classes fracturing process is main
Achieve the purpose that volume increase by penetrating through the natural fissure in rock mass, the preservation characteristic of this and shale gas itself is inconsistent.
Chinese patent CN102168543B discloses a kind of method and dress increasing shale gas recovery ratio by explosive manner
It sets, described device setting includes loading priming device and air transporting arrangement, wherein loading detonation dress in shale gas well bore hole
It sets for surrounding shale to burst apart, air transporting arrangement will be transported to ground by the shale gas oozed out in the shale that is burst apart
Face；This method and device have that explosive charge power dissipation, explosive charge capacity usage ratio are low.
Invention content
The technical problem to be solved by the present invention is to overcome the defect of the prior art, the one kind for overcoming above-mentioned technical problem is provided
Paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio.
In order to solve the above-mentioned technical problem, a kind of paraboloid of revolution cumulative pressure break of the present invention increases shale gas recovery ratio
Device technical solution it is as follows：
A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio, and described device setting is naked in shale gas well
In eye, described device includes priming device and air transporting arrangement, and for priming device for surrounding shale to burst apart, gas is defeated
Send device that will be transported to ground by the shale gas oozed out in the shale that is burst apart, the priming device includes detonation chain and detonation
Device, the air transporting arrangement include right flange, isolating device, Oil/Gas Pipe, poroid air inlet pipe；The poroid air inlet pipe setting exists
Between the isolating device and the right flange, one end of poroid air inlet pipe is arranged in the through-hole of the right flange, the other end
It is arranged in the through-hole in isolating device；Poroid air inlet pipe be the pipe with several air admission holes, Oil/Gas Pipe one end setting every
From in the through-hole of device, the other end is connected with ground gas collecting apparatus；The priming device further includes energy-gathering device, the cumulative dress
It sets including the middle energy gathering cap for vertically projecting explosive charge energy centralization outward, the left flange and the set that are arranged on the left of middle energy gathering cap
Pipe；
The middle energy gathering cap includes middle concave outer surface and middle concave inner surface, the middle concave outer surface and the concave
Shape inner surface is the paraboloid of revolution of outward opening, and the paraboloid of revolution of the middle concave inner surface forms cavity；In described
Energy gathering cap forms an enclosure space with left flange and right flange, and explosive is arranged in the space；The middle energy gathering cap is most
Big outer diameter is Dc, the length of the middle energy gathering cap is Lc；
Be outside described sleeve pipe cylinder and its inside be cylindrical hole, described sleeve pipe sequentially passes through the middle concave inner surface
Cavity and right flange through-hole, described sleeve pipe one end is fixed on the right side of left flange, and the described sleeve pipe other end is fixed on the right side
The right side of flange；
Several initiators, initiator is arranged in interval on the right surface of the left flange and the left surface of the right flange
It is connect with ground control unit by the detonation chain being arranged in described sleeve pipe, and initiator is controlled by ground control unit
Detonation；
Preferably, the rotary shaft of the middle concave outer surface is XcThe busbar of axis, the middle concave outer surface is busbar E,
The busbar E is around the XcAxis rotates to form the middle concave outer surface, and the busbar E is the parabolic being made of following equation
Line：
yc=a3+b3xc 2； (5)
The rotary shaft of the middle concave inner surface is XcThe busbar of axis, the middle concave inner surface is busbar F, the busbar
F is around the XcAxis rotates to form the concave inside surface, and the busbar F is the parabola being made of following equation：
yc=a4+b4xc 2； (6)
In various above：
Oc-XcYcZcThe coordinate origin of coordinate system is on the axis of the middle energy gathering cap and in the length of middle energy gathering cap
Point, XcAxis, YcAxis and ZcAxis constitutes right hand rectangular coordinate system, XcAxis is overlapped with the axis of the middle energy gathering cap, XcAxis positive direction from
The right side of energy gathering cap during the left side of middle energy gathering cap is directed toward；xc、ycAnd zcRespectively XcAxis, YcAxis and ZcThe coordinate variable of axis；
DcFor 100mm~800mm, LcFor 200mm~1000mm；
a3、b3、a4And b4For parameter, a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3>a4, b3、b4
It is calculated by following formula：
In formula：e3、e4For coefficient, e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3；
Preferably, the parameter：DcFor 200mm~500mm, LcFor 300mm~600mm；
Preferably, the parameter a3For Dc0.2~0.6 times, a4For Dc0.15~0.55 times and a3>a4；
Preferably, the parameter e3For 0.8~1.2, e4For 1.0~1.4 and e4>e3；
Compared with prior art, advantageous effect of the present invention is：Due to Mohaupt effect, parabolical optical characteristics, pass through
Middle energy gathering cap projects explosive charge energy centralization, and explosive charge capacity usage ratio is high, while improving the page in explosive fracturing area
The quantity of the length and shale crackle of lithofraction line；Especially because the cumulative action of middle energy gathering cap, squeezes from spatial vertical orientation
The shale in explosive fracturing area, crackle are formed through rapidly the shale zone of fracture, increase the specific surface area of shale, to be effectively increased
The parsing rate and its recovery ratio of shale gas.
Description of the drawings
Fig. 1 is schematic device；
Fig. 2 is middle energy gathering cap structural schematic diagram；
In above-mentioned Fig. 1-Fig. 2：1- shale gas well bore holes, 2- Oil/Gas Pipes, the poroid air inlet pipe of 3-, 7- air admission holes, 8- middle concaves
Outer surface, 9- middle concave inner surfaces, energy gathering cap in 10-, the left flanges of 13-, 17- casings, the right flanges of 18-, 19- isolating devices, 20-
Initiator, 21- detonation chains.
Specific implementation mode
Below in conjunction with Figure of description, preferred embodiment of the present invention will be described, it should be understood that described herein
Preferred embodiment is only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention
A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio, and described device setting is naked in shale gas well
1 in eye, described device includes priming device and air transporting arrangement, and priming device is for bursting apart surrounding shale, gas
Conveying device will be transported to ground by the shale gas oozed out in the shale that is burst apart, and the priming device includes 21 He of detonation chain
Initiator 20, the air transporting arrangement include right flange 18, isolating device 19, Oil/Gas Pipe 2, poroid air inlet pipe 3；It is described poroid
Air inlet pipe 3 is arranged between the isolating device 19 and the right flange 18, and one end setting of poroid air inlet pipe 3 is convex on the right side
In the through-hole of edge 18, the other end is arranged in the through-hole in isolating device 19；Poroid air inlet pipe 3 is with several air admission holes 7
Pipe, one end of Oil/Gas Pipe 2 are arranged in the through-hole of isolating device 19, and the other end is connected with ground gas collecting apparatus；The detonation dress
It further includes energy-gathering device to set, the energy-gathering device include the middle energy gathering cap 10 for vertically projecting explosive charge energy centralization outward,
Left flange 13 and casing 17 in 10 left side of middle energy gathering cap is set；
The middle energy gathering cap 10 includes middle concave outer surface 8 and middle concave inner surface 9, the middle concave outer surface 8 and institute
The paraboloid of revolution that middle concave inner surface 9 is outward opening is stated, the paraboloid of revolution of the middle concave inner surface 9 forms sky
Chamber；The middle energy gathering cap 10 forms an enclosure space with left flange 13 and right flange 18, and explosive is arranged in the space；Institute
The maximum outside diameter for stating middle energy gathering cap 10 is Dc, the length of the middle energy gathering cap 10 is Lc；
The outside of described sleeve pipe 17 be cylinder and its inside be cylindrical hole, described sleeve pipe 17 sequentially passes through in the middle concave
The through-hole of the cavity on surface 9 and right flange, 17 one end of described sleeve pipe are fixed on the right side of left flange 13, and described sleeve pipe 17 is another
End is fixed on the right side of right flange 18；
Several initiators 20 are arranged in interval on the right surface of the left flange 13 and the left surface of the right flange 18,
Initiator 20 is connect by the detonation chain 21 being arranged in described sleeve pipe 17 with ground control unit, and is controlled and filled by ground
Set the detonation of control initiator 20；
Establish Oc-XcYcZcThe coordinate origin of coordinate system is on the axis of the middle energy gathering cap 10 and in middle energy gathering cap 10
The midpoint of length, XcAxis, YcAxis and ZcAxis constitutes right hand rectangular coordinate system, XcAxis is overlapped with the axis of the middle energy gathering cap 10, Xc
Axis positive direction therefrom energy gathering cap 10 left side be directed toward in energy gathering cap 10 right side；xc、ycAnd zcRespectively XcAxis, YcAxis and ZcAxis
Coordinate variable.
The rotary shaft of the middle concave outer surface 8 is XcThe busbar of axis, the middle concave outer surface 8 is busbar E, the mother
Line E is around the XcAxis rotates to form the middle concave outer surface 8, and the busbar E is the parabola being made of following equation：
yc=a3+b3xc 2； (15)
The rotary shaft of the middle concave inner surface 9 is XcThe busbar of axis, the middle concave inner surface 9 is busbar F, the mother
Line F is around the XcAxis rotates to form the concave inside surface 9, and the busbar F is the parabola being made of following equation：
yc=a4+b4xc 2； (16)
a3、b3、a4And b4For parameter, a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3>a4；
Known parabola is by vertex (0, a3, 0) and other two points
Then rule of thumb, b3、b4It is calculated by following formula：
In formula：e3、e4For coefficient, e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3。
The present embodiment is chosen：Dc=300mm, Lc=400mm, takes a3For Dc0.2 times i.e. a3=60mm, takes a4For Dc's
0.15 times i.e. a4=45mm and meet a3>a4, take e3=0.8 and e4=1.0 and meet e4>e3, bring into respectively formula (16-1) and
(16-2), obtains：
The technical solution of the present embodiment and its major parameter determination finish as a result,.
It is preferable that above example integrates Mohaupt effect.
According to Mohaupt effect, after explosive charge, explosion product is at high temperature under high pressure substantially along explosive normal to a surface side
To what is dispersed outward, therefore, explosive with groove will appear one is converged, speed and pressure after ignition in recess axis
Strong all very high explosion product stream, in a certain range puts together the explosion energy that explosive charge releases.This hair
The outer surface of bright middle energy gathering cap 10 and inner surface are the paraboloid of revolution, and busbar E, busbar F are parabola, the paraboloid of revolution
Rotary shaft and the parabolical axis of symmetry it is at a right angle；Rotation of the parabolical axis of symmetry of middle energy gathering cap 10 around the paraboloid of revolution
The plane rotated perpendicular to axis is formed after shaft rotation；Due to parabolical light characteristic, i.e., the light through focus is through parabola
For light ray parallel after reflection in the parabolical axis of symmetry, this parabolical characteristic further enhances Mohaupt effect；Explosive
After explosion, the explosion energy of middle energy gathering cap 10 is converged along the plane perpendicular to axis rotation to be projected, and is squeezed from spatial vertical orientation quick-fried
The shale in fried pressure break area, crackle is formed through rapidly the shale zone of fracture, increases the specific surface area of shale, to effectively increase
The parsing rate and its recovery ratio of shale gas.
Wall thickness for energy gathering cap in guarantee 10 is gradually reduced from centre to both sides, it is desirable that a3>a4。
Parameter a3、a4、e3、e4Value, should be selected according to performances such as the hardness of shale, parameter a3、a4Value it is smaller, Explosive Energy
Amount convergence is more concentrated, and explosive fracturing area is deep and narrow, the length of shale crackle is longer；Conversely, explosion energy convergence more dissipates, explode
Pressure break area is wide and shallow, the length of shale crackle is shorter.a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3>
a4；e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3；Preferably：a3For Dc0.2~0.6 times, a3For Dc0.15~0.55
Times and a3>a3；e3For 0.8~1.2, e4For 1.0~1.4 and e4>e3。
Middle energy gathering cap 10 is made by the aluminium alloy of 7A09 models, and cost performance is best.
Left flange 13 and right flange 18 are made by 4350 steel alloys, and cost performance is best.
Described sleeve pipe 17 is made by HP9-4-20 type high temperature resistant stainless steel pipes, and cost performance is best.
A kind of paraboloid of revolution cumulative pressure break disclosed in this invention increases the device of shale gas recovery ratio, when making,
Explosive is put into priming device in advance, then whole device is arranged 1 in shale gas well bore hole again；Initiator 20 includes
Electric cap, digital primer etc., detonation mode include electric initiating, digital detonation etc.；The explosive includes liquid explosives, solid explosive
Deng.
Above example is the primary structure of the present invention, form parameter, remaining CONSTRUCTED SPECIFICATION is common according to this professional domain
Common technical knowledge and conventional techniques are designed and select.
Claims (6)
1. a kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio, described device is arranged in shale gas well bore hole
In, described device includes priming device and air transporting arrangement, and priming device is for bursting apart surrounding shale, gas conveying
Device will be transported to ground by the shale gas oozed out in the shale that is burst apart, and the priming device includes detonation chain and detonation
Device, the air transporting arrangement include right flange, isolating device, Oil/Gas Pipe, poroid air inlet pipe；The poroid air inlet pipe setting exists
Between the isolating device and the right flange, one end of poroid air inlet pipe is arranged in the through-hole of the right flange, the other end
It is arranged in the through-hole in isolating device；Poroid air inlet pipe be the pipe with several air admission holes, Oil/Gas Pipe one end setting every
From in the through-hole of device, the other end is connected with ground gas collecting apparatus；It is characterized in that the priming device further includes cumulative dress
It sets, the energy-gathering device includes the middle energy gathering cap for vertically projecting explosive charge energy centralization outward, setting on a middle energy gathering cap left side
The left flange and casing of side；
The middle energy gathering cap includes middle concave outer surface and middle concave inner surface, in the middle concave outer surface and the middle concave
Surface is the paraboloid of revolution of outward opening, and the paraboloid of revolution of the middle concave inner surface forms cavity；The middle cumulative
Cover forms an enclosure space with left flange and right flange, and explosive is arranged in the space；The maximum of the middle energy gathering cap is outer
Diameter is Dc, the length of the middle energy gathering cap is Lc；
Be outside described sleeve pipe cylinder and its inside be cylindrical hole, described sleeve pipe sequentially passes through the sky of the middle concave inner surface
The through-hole of chamber and right flange, described sleeve pipe one end are fixed on the right side of left flange, and the described sleeve pipe other end is fixed on right flange
Right side.
2. a kind of paraboloid of revolution cumulative pressure break according to claim 1 increases the device of shale gas recovery ratio, feature
It is,
The rotary shaft of the middle concave outer surface is XcThe busbar of axis, the middle concave outer surface is busbar E, and the busbar E is around institute
State XcAxis rotates to form the middle concave outer surface, and the busbar E is the parabola being made of following equation：
yc=a3+b3xc 2；
The rotary shaft of the middle concave inner surface is XcThe busbar of axis, the middle concave inner surface is busbar F, and the busbar F is around institute
State XcAxis rotates to form the concave inside surface, and the busbar F is the parabola being made of following equation：
yc=a4+b4xc 2；
In various above：
Oc-XcYcZcThe midpoint of length of the coordinate origin of coordinate system on the axis of the middle energy gathering cap and in middle energy gathering cap, Xc
Axis, YcAxis and ZcAxis constitutes right hand rectangular coordinate system, XcAxis is overlapped with the axis of the middle energy gathering cap, XcAxis positive direction is therefrom gathered
The right side of energy gathering cap during the left side that can be covered is directed toward；xc、ycAnd zcRespectively XcAxis, YcAxis and ZcThe coordinate variable of axis；
DcFor 100mm~800mm, LcFor 200mm~1000mm；
a3、b3、a4And b4For parameter, a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3>a4, b3、b4By with
Lower formula calculates：
In formula：e3、e4For coefficient, e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3。
3. a kind of paraboloid of revolution cumulative pressure break according to claim 2 increases the device of shale gas recovery ratio, feature
It is, the parameter a3For Dc0.2~0.6 times, a4For Dc0.15~0.55 times and a3>a4。
4. a kind of paraboloid of revolution cumulative pressure break according to claim 2 increases the device of shale gas recovery ratio, feature
It is, the parameter e3For 0.8~1.2, e4For 1.0~1.4 and e4>e3。
5. a kind of paraboloid of revolution cumulative pressure break according to claim 2 increases the device of shale gas recovery ratio, feature
It is, the parameter DcFor 200mm~500mm, LcFor 300mm~600mm.
6. a kind of paraboloid of revolution cumulative pressure break according to claim 2,3,4 or 5 increases the device of shale gas recovery ratio,
It is characterized in that, the parameter Dc=300mm, Lc=400mm, a3=60mm, a4=45mm, takes e3=0.8, e4=1.0, b3=
0.0015, b4=0.001875.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209437.4A CN108331569A (en) | 2018-03-14 | 2018-03-14 | A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209437.4A CN108331569A (en) | 2018-03-14 | 2018-03-14 | A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108331569A true CN108331569A (en) | 2018-07-27 |
Family
ID=62932205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810209437.4A Withdrawn CN108331569A (en) | 2018-03-14 | 2018-03-14 | A kind of paraboloid of revolution cumulative pressure break increases the device of shale gas recovery ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108331569A (en) |
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2018
- 2018-03-14 CN CN201810209437.4A patent/CN108331569A/en not_active Withdrawn
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Application publication date: 20180727 |