CN106050214A - Exploitation method of combustible ice - Google Patents
Exploitation method of combustible ice Download PDFInfo
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- CN106050214A CN106050214A CN201610430858.0A CN201610430858A CN106050214A CN 106050214 A CN106050214 A CN 106050214A CN 201610430858 A CN201610430858 A CN 201610430858A CN 106050214 A CN106050214 A CN 106050214A
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- ice sheet
- sleeve pipe
- flammable
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 82
- 239000007789 gas Substances 0.000 claims description 49
- 239000003345 natural gas Substances 0.000 claims description 41
- 238000011084 recovery Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000002085 persistent effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 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
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- 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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an exploitation method of combustible ice. The exploitation method comprises the following steps that 1, well drilling is conducted, specifically, a first well extending from top to bottom is drilled in the top of a combustible ice layer, and at least one second well which extends transversely and communicates with the first well is drilled in the combustible ice layer; 2, well cementation is conducted, specifically, a guide pipe is arranged in the first well and the second wells, then the space between the outer wall face of the guide pipe and the inner wall face of the first well as well as the space between the outer wall face of the guide pipe and the inner wall face of each second well are grouted with concrete, and thus a concrete layer is formed; 3, perforation is conducted, specifically, at least an inner hole communicating with the guide pipe and a hole of the combustible ice layer are formed in the portion, corresponding to the combustible ice layer, of the concrete layer of each second well and the side wall of the guide pipe with a perforating gun; and 4, exploitation is conducted. By the adoption of the exploitation method, the combustible ice layer can be prevented from being collapsed, more second wells can be drilled, the exploration and exploitation period is short, the construction safety is good, the production cost is low, and the economical efficiency is good.
Description
Technical field
The present invention relates to natural gas extraction technology, be specifically related to the recovery method of combustible ice.
Background technology
After 20-30, the whole world is it would appear that the energy is waste.Show with investigation exploration according to research, send out in ocean
Show combustible ice (gas hydrates), it is possible to the mankind use about 1000.It is found that combustible ice, storage in China Qinghai-Tibet Platean
Measure about 35,000,000,000 tons, available 35 years.
Aforementioned combustible ice, the gas hydrates (Natural being distributed across in the permafrost of halmeic deposit or land-based area
Gas Hydrate, is called for short Gas Hydrate), natural gas and water the crystal of the class ice-like formed under the conditions of high pressure low temperature
Matter.Because its outward appearance and meets fire i.e. incendivity as ice, so being referred to as " combustible ice ", " solid gas " or " gas ice ".
How to exploit these combustible ices, the whole world has all carried out the research of this respect, but the most preferable method.Existing
It is, such as, in recovery process, to be likely to result in flammable ice sheet and collapse, and cause tsunami, make to the mankind in the problem being primarily present
Becoming the biggest threat, combustible ice evaporate in air, causes greenhouse effect, makes global warming, therefore hesitates to exploit.
For this reason, it may be desirable to seek a kind of technical scheme, at least to alleviate the problems referred to above.
Summary of the invention
The technical problem to be solved in the present invention is to provide and a kind of can prevent flammable ice sheet from collapsing and that cost of winning is low is flammable
The recovery method of ice sheet.
For solving above-mentioned technical problem, the present invention uses following technical proposals.
The recovery method of a kind of combustible ice, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, be drilled into few in described flammable ice sheet
The second well connected with described first well extended transversely flatly；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by the implantation temperature pressure more than or equal to 200 DEG C in described first well wherein a bite the second well
Air more than or equal to 10 MPas, is continuously injected into 1-3 this second well well head of month rear enclosed；Well head pressure when this second well
When increasing 10-20 MPa on the basis of the well head pressure when closing this second well, start the sky injected before outwards discharge
Gas also measures the content of natural gas in discharged air, when in the air discharged, the content of natural gas is more than or equal to 50%
Time igniting emptying, when igniting emptying is until the content of natural gas is more than or equal to 80% in the air that discharged, by this second well
Institute's expellant gas input gas transmission equipment, or, the persistent period injected by the temperature and air regulating the air injected,
When making this second well gas production of single port no less than annual 1 billion cubic meter, by this second well institute expellant gas input gas transmission equipment.
Also include the step exploiting flammable ice sheet corresponding to remaining second well according to described step 4.
In described step 1, described second well layered arrangement from top to bottom.
Every layer arranges described second well of 1-10 mouth.
Distance is combustible ice layer thickness 1st/1st to two/3rd of the superiors' end face away from flammable ice sheet.
Described second well is radially arranged centered by described first well.
In described step 4, the temperature of the air injected is 200-2000 DEG C.
In described step 4, within every 30-60 minute, measure the content of natural gas in the air once discharged.
In described step 4, the air compressor being installed on mobile drilling platforms is used to inject air to this second well.
The recovery method of a kind of combustible ice, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, be drilled into few in described flammable ice sheet
The second well connected with described first well extended transversely flatly；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by the injection pressure sky more than or equal to 10 MPas in described first well wherein a bite the second well
Gas, is continuously injected into 1-3 this second well well head of month rear enclosed；Then the air that electrical heating is injected makes air and flammable ice sheet
Combustion of natural gas and heat the flammable ice sheet corresponding to this second well, when the well head pressure of this second well is at initial well mouth pressure
On the basis of when increasing 10-20 MPa, start the air that injected before outwards discharge and measure natural gas in discharged air
Content, when in the air discharged the content of natural gas more than or equal to 50% time igniting emptying, igniting emptying until being arranged
When in the air put, the content of natural gas is more than or equal to 80%, by this second well institute expellant gas input gas transmission equipment.
The present invention has following Advantageous Effects.
The present invention is boring the first well from top to bottom extended at the top of flammable ice sheet, is drilled into few a bite in flammable ice sheet
The second well connected with the first well extended transversely；In first and second well, sleeve pipe is set, then this sleeve pipe outside wall surface with
Between the internal face of this first and second well, concreting forms concrete layer；At least in the second well corresponding to flammable ice sheet
Concrete, the sidewall of sleeve pipe arranges and connects the endoporus of this sleeve pipe and the hole of flammable ice sheet；Exploit wherein one second well institute more right
The flammable ice sheet answered, and then obtain natural gas.Use technique scheme, it is possible to prevent flammable ice sheet from collapsing and bore more the
Two wells, and explore, the exploitation cycle short, working security is good, and production cost is low, good economy performance.
Detailed description of the invention
Below in conjunction with embodiment, present disclosure is described in further details, but embodiments of the invention are not limited to
This.
Embodiment 1
The recovery method of a kind of combustible ice of the present invention, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, in described flammable ice sheet, bore 1 opening's edge
Second well connected with described first well of horizontal expansion；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by described first well wherein flatly in the second well implantation temperature be the pressure of 200 DEG C be 10 MPas
Air, be continuously injected into 1 month this second well well head of rear enclosed；When the well head pressure of this second well is at this second well of closing
When increasing by 10 MPas on the basis of well head pressure, start the air that injected before outwards discharge and measure in discharged air
The content of natural gas, the igniting emptying when the content of natural gas is 50% in the air discharged, igniting emptying is until being discharged
Air in the content of natural gas when being 80%, by this second well institute expellant gas input gas transmission equipment, or, by regulation
The persistent period that the temperature of the air injected and air inject, when making this second well gas production of single port reach annual 1 billion cubic meter,
By this second well institute expellant gas input gas transmission equipment.
Embodiment 2
The recovery method of a kind of combustible ice of the present invention, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, in described flammable ice sheet, bore 5 opening's edges
Second well connected with described first well of horizontal expansion；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by described first well wherein flatly in the second well implantation temperature be the pressure of 1000 DEG C be 20 MPas
Air, be continuously injected into 2 months these the second well well heads of rear enclosed；When the well head pressure of this second well is at this second well of closing
When increasing by 15 MPas on the basis of well head pressure, start the air that injected before outwards discharge and measure in discharged air
The content of natural gas, the igniting emptying when the content of natural gas is 65% in the air discharged, igniting emptying is until being discharged
Air in the content of natural gas when being 85%, by this second well institute expellant gas input gas transmission equipment, or, by regulation
The persistent period that the temperature of the air injected and air inject, when making this second well annual 1.1 billion cubic meter of gas production of single port,
By this second well institute expellant gas input gas transmission equipment.
Embodiment 3
The recovery method of a kind of combustible ice of the present invention, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, in described flammable ice sheet, bore 10 mouthfuls
The second well connected with described first well extended transversely；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by described first well wherein flatly in the second well implantation temperature be the pressure of 2000 DEG C be 30 MPas
Air, be continuously injected into 3 months these the second well well heads of rear enclosed；When the well head pressure of this second well is at this second well of closing
When increasing by 20 MPas on the basis of well head pressure, start the air that injected before outwards discharge and measure in discharged air
The content of natural gas, the igniting emptying when the content of natural gas is 70% in the air discharged, igniting emptying is until being discharged
Air in the content of natural gas when being 90%, by this second well institute expellant gas input gas transmission equipment, or, by regulation
The persistent period that the temperature of the air injected and air inject, making this second well gas production of single port is annual 1.5 billion cubic meters
Time, by this second well institute expellant gas input gas transmission equipment.
Embodiment 4
The recovery method of a kind of combustible ice of the present invention, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, in described flammable ice sheet, bore 1 opening's edge
Second well connected with described first well of horizontal expansion；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, it is the air of 10 MPas by injection pressure in described first well wherein a bite the second well, notes continuously
Enter 1 month this second well well head of rear enclosed；Then the air that electrical heating is injected makes the combustion of natural gas of air and flammable ice sheet
And heat the flammable ice sheet corresponding to this second well, when the well head pressure of this second well increases on the basis of initial well mouth pressure
When 20 MPas, start the air that injected before outwards discharge and measure the content of natural gas in discharged air, when being arranged
The content of natural gas igniting emptying when being 50% in the air put, igniting emptying is until the content of natural gas in the air that discharged
When being 80%, by this second well institute expellant gas input gas transmission equipment.
Embodiment 5
The recovery method of a kind of combustible ice of the present invention, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, in described flammable ice sheet, bore 5 opening's edges
Second well connected with described first well of horizontal expansion；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, it is the air of 20 MPas by injection pressure in described first well wherein a bite the second well, notes continuously
Enter 2 months these the second well well heads of rear enclosed；Then the air that electrical heating is injected makes the combustion of natural gas of air and flammable ice sheet
And heat the flammable ice sheet corresponding to this second well, when the well head pressure of this second well increases on the basis of initial well mouth pressure
When 15 MPas, start the air that injected before outwards discharge and measure the content of natural gas in discharged air, when being arranged
The content of natural gas igniting emptying when being 65% in the air put, igniting emptying is until the content of natural gas in the air that discharged
When being 85%, by this second well institute expellant gas input gas transmission equipment.
Embodiment 6
The recovery method of a kind of combustible ice of the present invention, comprises the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, in described flammable ice sheet, bore 10 mouthfuls
The second well connected with described first well extended transversely；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, it is the air of 30 MPas by injection pressure in described first well wherein a bite the second well, notes continuously
Enter 3 months these the second well well heads of rear enclosed；Then the air that electrical heating is injected makes the combustion of natural gas of air and flammable ice sheet
And heat the flammable ice sheet corresponding to this second well, when the well head pressure of this second well increases on the basis of initial well mouth pressure
When 20 MPas, start the air that injected before outwards discharge and measure the content of natural gas in discharged air, when being arranged
The content of natural gas igniting emptying when being 70% in the air put, igniting emptying is until the content of natural gas in the air that discharged
When being 90%, by this second well institute expellant gas input gas transmission equipment.
Embodiment 7
The present embodiment is with previous embodiment difference, and in step 1, the second well layered arrangement from top to bottom, to improve peace
Full property and yield, in addition, other are the most same as the previously described embodiments.
Embodiment 8
The present embodiment is with previous embodiment 7 difference, and every layer arranges 1-10 mouth the second well, uses the second of appropriate quantity
Well is to improve yield, and can prevent flammable ice sheet from collapsing, and improves the efficiency of exploitation, reduces cost, and in addition, other are all with front
State embodiment 7 identical.
Embodiment 9
The present embodiment is with previous embodiment 7,8 difference, and the distance of the superiors' end face away from flammable ice sheet is combustible ice
/ to two/3rd of layer thickness, it is not easy to cause flammable ice sheet to collapse, beneficially brill the second well, in addition, its
He is all identical with previous embodiment 7,8.
Embodiment 10
The present embodiment is with previous embodiment difference, also includes exploiting corresponding to remaining second well according to described step 4
The step of flammable ice sheet, to improve yield, reduce production cost, in addition, other are all identical with previous embodiment.
Embodiment 11
The present embodiment is with previous embodiment difference, described second well radially cloth centered by described first well
Put, can more reasonably bore the second well and prevent from collapsing, along first well circumference uniform preferably, in addition, other all with aforementioned reality
Execute example identical.
In step 4, the temperature of the air injected selects preferably between 200-2000 DEG C, and temperature is too high, easily causes set
Tube swelling, causes gas leakage.
In step 4, within every 30-60 minute, measure the content of natural gas in the air once discharged preferable.
In step 4, can be, but not limited to use air compressor to inject air to this second well, air compressor is installed on
Mobile drilling platforms is preferable.
In step 4, inject air to the second well, by defeated for this second well institute expellant gas input after meeting above-mentioned requirements
Gas equipment, the second continuous expellant gas of well can cause the second well to be unsatisfactory for above-mentioned requirements, can be again when there is this situation
Air is injected to this second well, by this second well institute expellant gas input gas transmission equipment after again meeting above-mentioned requirements, as
This alternately, fully to exploit the flammable ice sheet corresponding to this second well.
Concrete can be, but not limited to use cement production systD.
Sleeve pipe can be, but not limited to use petroleum casing pipe.
The quantity of first and second well is not particular value, according to the actual requirements, it is also possible to be other quantity.
It should be noted that each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable feelings
Under condition, can by any applicable by the way of be combined.Each concrete technology described in different detailed description of the invention is special
Levy, in the case of reconcilable, each other can also by any applicable by the way of be combined.In order to avoid unnecessary
Repeating, various possible compound modes are not described further by the present invention.
Above with reference to embodiment to the present invention have been described in detail, it is illustrative and not restrictive, is not taking off
Change under present general inventive concept and/or amendment, all within protection scope of the present invention.
Claims (10)
1. the recovery method of a combustible ice, it is characterised in that comprise the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, be drilled into few in described flammable ice sheet
The second well connected with described first well extended transversely flatly；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by the implantation temperature pressure more than or equal to 200 DEG C in described first well wherein a bite the second well
Air more than or equal to 10 MPas, is continuously injected into 1-3 this second well well head of month rear enclosed；Well head pressure when this second well
When increasing 10-20 MPa on the basis of the well head pressure when closing this second well, start the sky injected before outwards discharge
Gas also measures the content of natural gas in discharged air, when in the air discharged, the content of natural gas is more than or equal to 50%
Time igniting emptying, when igniting emptying is until the content of natural gas is more than or equal to 80% in the air that discharged, by this second well
Institute's expellant gas input gas transmission equipment, or, the persistent period injected by the temperature and air regulating the air injected,
When making this second well gas production of single port no less than annual 1 billion cubic meter, by this second well institute expellant gas input gas transmission equipment.
The recovery method of combustible ice the most according to claim 1, it is characterised in that also include exploiting according to described step 4
The step of the flammable ice sheet corresponding to remaining second well.
The recovery method of combustible ice the most according to claim 1, it is characterised in that in described step 1, described second well by
Up to lower leaf is arranged.
The recovery method of combustible ice the most according to claim 3, it is characterised in that every layer arranges 1-10 mouth described second
Well.
The recovery method of combustible ice the most according to claim 3, it is characterised in that the superiors' end face away from flammable ice sheet
Distance is 1st/1st to two/3rd of combustible ice layer thickness.
The recovery method of combustible ice the most according to claim 1, it is characterised in that described second well with described first well is
Center is radially arranged.
The recovery method of combustible ice the most according to claim 1, it is characterised in that in described step 4, the air injected
Temperature be 200-2000 DEG C.
The recovery method of combustible ice the most according to claim 1, it is characterised in that in described step 4, every 30-60 minute
Measure the content of natural gas in the air once discharged.
9. according to the recovery method of the combustible ice described in any one of claim 1 to 8, it is characterised in that in described step 4, adopt
Air is injected to this second well with the air compressor being installed on mobile drilling platforms.
10. the recovery method of a combustible ice, it is characterised in that comprise the following steps:
Step 1, drilling well, bore the first well from top to bottom extended at the top of flammable ice sheet, be drilled into few in described flammable ice sheet
The second well connected with described first well extended transversely flatly；
Step 2, well cementation, sleeve pipe is set in described first and second well, then at outside wall surface and this first and second well of this sleeve pipe
Between internal face, concreting forms concrete layer；
Step 3, perforation, at least concrete layer in described second well corresponding to flammable ice sheet, the sidewall of sleeve pipe use and penetrate
Hole rifle arranges endoporus and the hole of flammable ice sheet connecting this sleeve pipe；
Step 4, exploitation, by the injection pressure sky more than or equal to 10 MPas in described first well wherein a bite the second well
Gas, is continuously injected into 1-3 this second well well head of month rear enclosed；Then the air that electrical heating is injected makes air and flammable ice sheet
Combustion of natural gas and heat the flammable ice sheet corresponding to this second well, when the well head pressure of this second well is at initial well mouth pressure
On the basis of when increasing 10-20 MPa, start the air that injected before outwards discharge and measure natural gas in discharged air
Content, when in the air discharged the content of natural gas more than or equal to 50% time igniting emptying, igniting emptying until being arranged
When in the air put, the content of natural gas is more than or equal to 80%, by this second well institute expellant gas input gas transmission equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610430858.0A CN106050214B (en) | 2016-06-17 | 2016-06-17 | The recovery method of combustible ice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN107313752A (en) * | 2017-06-20 | 2017-11-03 | 天津大学 | Combustible ice based on super lubrication gas transport interface fells and transports device and fells and transports method |
| CN108071370A (en) * | 2016-11-15 | 2018-05-25 | 梁嘉麟 | The planning of common seabed combustible ice mineral reserve is exploited using decompression method |
| CN108071369A (en) * | 2016-11-15 | 2018-05-25 | 梁嘉麟 | The simple type recovery scheme of common seabed combustible ice mineral reserve |
| CN108194055A (en) * | 2018-01-03 | 2018-06-22 | 伍丕济 | The recovery method of combustible ice |
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| CN108194055B (en) * | 2018-01-03 | 2019-12-10 | 伍丕济 | method for exploiting combustible ice |
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| CN106050214B (en) | 2019-03-29 |
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