CN106050214B - The recovery method of combustible ice - Google Patents
The recovery method of combustible ice Download PDFInfo
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- CN106050214B CN106050214B CN201610430858.0A CN201610430858A CN106050214B CN 106050214 B CN106050214 B CN 106050214B CN 201610430858 A CN201610430858 A CN 201610430858A CN 106050214 B CN106050214 B CN 106050214B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 239000004568 cement Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 80
- 239000007789 gas Substances 0.000 claims description 51
- 239000003345 natural gas Substances 0.000 claims description 40
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000005485 electric heating Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 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
- 239000000243 solution Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 235000009566 rice Nutrition 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
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
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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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention discloses a kind of recovery method of combustible ice, comprising the following steps: step 1, drilling well bores the first well from top to bottom extended at the top of flammable ice sheet, the second well being connected to first well that few a bite extends transversely is drilled into the flammable ice sheet；Step 2, it cements the well, conduit is set in first and second well, then concreting forms concrete layer between the outside wall surface of the conduit and the inner wall of first and second well；Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is connected to the inner hole of the casing and the hole of flammable ice sheet using perforating gun setting；Step 4, it exploits.It can prevent flammable ice sheet from collapsing and boring more second wells, and explore, exploit that the period is short, and working security is good, and production cost is low, good economy performance.
Description
Technical field
The present invention relates to natural gas extraction technologies, and in particular to the recovery method of combustible ice.
Background technique
After 20-30, the whole world will will appear energy famine.Show to send out in ocean according to research and investigation exploration
Show combustible ice (gas hydrates), it can be mankind's use about 1000.Combustible ice is had found in China Qinghai-Tibet Platean, is stored
About 35,000,000,000 tons, available 35 years of amount.
Aforementioned combustible ice, the gas hydrates (Natural being distributed across in the permafrost of halmeic deposit or land-based area
Gas Hydrate, abbreviation Gas Hydrate), by the crystal for the class ice-like that natural gas and water are formed under the conditions of high pressure low temperature
Matter.Because of its appearance as ice and also meet fire be incendivity, so be referred to as " combustible ice ", " solid gas " or " gas ice ".
How these combustible ices are exploited, and the whole world has all carried out the research of this respect, but never preferable method.It is existing
It is for example, may cause flammable ice sheet in recovery process and collapse, and to cause tsunami, made to the mankind the problem of being primarily present
At very big threat, combustible ice is evaporate into air, causes greenhouse effects, is made global warming, therefore is hesitated to exploit.
For this reason, it may be desirable to seek a kind of technical solution, at least to mitigate the above problem.
Summary of the invention
The technical problem to be solved by the present invention is to providing 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.
In order to solve the above technical problems, the present invention adopts the following technical solutions.
A kind of recovery method of combustible ice, comprising the following steps:
Step 1, drilling well is bored the first well from top to bottom extended at the top of flammable ice sheet, is bored in the flammable ice sheet
The second well being connected to first well at least extended transversely flatly；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, by injection temperature in first well thereto the second well of a bite more than or equal to 200 DEG C
Pressure is greater than or equal to the air of 10 megapascal, is continuously injected into a month rear enclosed of 1-3 the second well well head；When the well head of second well
When increasing 10-20 megapascal on the basis of well head pressure of the pressure when closing second well, start to be injected before discharge outward
Air and measure the content of natural gas in discharged air, when the content of natural gas in the air discharged is greater than or equal to
Light a fire when 50% emptying, igniting emptying until when the content of natural gas is greater than or equal to 80% in the air that is discharged, by this
The gas that two wells are discharged inputs gas transmission equipmen, alternatively, the temperature and air injection by adjusting injected air continue
Time, when single port the second well gas production being made to be no less than annual 1 billion cubic meter, the gas which is discharged inputs gas transmission
Equipment.
Further include the steps that exploiting flammable ice sheet corresponding to remaining second well according to the step 4.
In the step 1, second well from top to bottom layered arrangement.
Every layer of 1-10 mouthfuls of setting second well.
The distance of top surface of the top layer away from flammable ice sheet is the one third of flammable ice layer thickness to half.
Second well radial arrangement centered on first well.
In the step 4, the temperature of the air injected is 200-2000 DEG C.
In the step 4, every 30-60 minutes measures the content of natural gas in the air once discharged.
In the step 4, air is injected to second well using the air compressor for being installed on mobile drilling platforms.
A kind of recovery method of combustible ice, comprising the following steps:
Step 1, drilling well is bored the first well from top to bottom extended at the top of flammable ice sheet, is bored in the flammable ice sheet
The second well being connected to first well at least extended transversely flatly；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, 10 megapascal is greater than or equal to by injection pressure in first well thereto the second well of a bite
Air is continuously injected into a month rear enclosed of 1-3 the second well well head；Then the air that electric heating is injected makes air and flammable ice sheet
Combustion of natural gas and heat flammable ice sheet corresponding to second well, when the well head pressure of second well is in initial well head pressure
On the basis of the air that is injected and measured natural in discharged air when increasing 10-20 megapascal, before starting discharge outward
The content of gas, the igniting emptying when the content of natural gas in the air discharged is greater than or equal to 50%, igniting emptying is until institute
When the content of natural gas is greater than or equal to 80% in the air of discharge, the gas which is discharged inputs gas transmission equipmen.
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, and few a bite is drilled into flammable ice sheet
The second well being connected to the first well extended transversely；Casing is set in the first and second well, then the outside wall surface of the casing with
Concreting forms concrete layer between the inner wall of first and second well；At least in the second well corresponding to flammable ice sheet
Concrete, casing side wall setting be connected to the casing inner hole and flammable ice sheet hole；It is right that wherein one second well institute is exploited again
The flammable ice sheet answered, and then obtain natural gas.By adopting the above technical scheme, it can prevent flammable ice sheet from collapsing and boring more
Two wells, and explore, exploit that the period is short, and working security is good, and production cost is low, good economy performance.
Specific embodiment
The contents of the present invention are described in further details below with reference to embodiment, but the embodiment of the present invention is not limited to
This.
Embodiment 1
A kind of recovery method of combustible ice of the invention, comprising the following steps:
Step 1, drilling well bores the first well from top to bottom extended at the top of flammable ice sheet, bores 1 in the flammable ice sheet
The second well being connected to first well that opening's edge is laterally extended；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, is 10 by the pressure that injection temperature in first well thereto the second well of a bite is 200 DEG C
The air of megapascal is continuously injected into 1 month rear enclosed the second well well head；When the well head pressure of second well is closing second well
When well head pressure on the basis of when increasing by 10 megapascal, start the air injected before discharge outward and measure discharged sky
The content of natural gas in gas, the igniting emptying when the content of natural gas in the air discharged is 50%, igniting emptying is until institute
When the content of natural gas is 80% in the air of discharge, the gas which is discharged inputs gas transmission equipmen, alternatively, passing through
The temperature of injected air and the duration of air injection are adjusted, makes single port the second well gas production up to annual 100000000 cubes
Meter Shi, the gas which is discharged input gas transmission equipmen.
Embodiment 2
A kind of recovery method of combustible ice of the invention, comprising the following steps:
Step 1, drilling well bores the first well from top to bottom extended at the top of flammable ice sheet, bores 5 in the flammable ice sheet
The second well being connected to first well that opening's edge is laterally extended；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, is 20 by the pressure that injection temperature in first well thereto the second well of a bite is 1000 DEG C
The air of megapascal is continuously injected into 2 months rear enclosed the second well well heads；When the well head pressure of second well is closing second well
When well head pressure on the basis of when increasing by 15 megapascal, start the air injected before discharge outward and measure discharged sky
The content of natural gas in gas, the igniting emptying when the content of natural gas in the air discharged is 65%, igniting emptying is until institute
When the content of natural gas is 85% in the air of discharge, the gas which is discharged inputs gas transmission equipmen, alternatively, passing through
The temperature of injected air and the duration of air injection are adjusted, makes annual 1.1 hundred million cubes of the second well gas production of single port
Meter Shi, the gas which is discharged input gas transmission equipmen.
Embodiment 3
A kind of recovery method of combustible ice of the invention, comprising the following steps:
Step 1, drilling well is bored the first well from top to bottom extended at the top of flammable ice sheet, is bored in the flammable ice sheet
The second well being connected to first well that 10 opening's edges are laterally extended；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, is 30 by the pressure that injection temperature in first well thereto the second well of a bite is 2000 DEG C
The air of megapascal is continuously injected into 3 months rear enclosed the second well well heads；When the well head pressure of second well is closing second well
When well head pressure on the basis of when increasing by 20 megapascal, start the air injected before discharge outward and measure discharged sky
The content of natural gas in gas, the igniting emptying when the content of natural gas in the air discharged is 70%, igniting emptying is until institute
When the content of natural gas is 90% in the air of discharge, the gas which is discharged inputs gas transmission equipmen, alternatively, passing through
The temperature of injected air and the duration of air injection are adjusted, keeps single port the second well gas production annual 1.5 hundred million vertical
When square rice, the gas which is discharged inputs gas transmission equipmen.
Embodiment 4
A kind of recovery method of combustible ice of the invention, comprising the following steps:
Step 1, drilling well bores the first well from top to bottom extended at the top of flammable ice sheet, bores 1 in the flammable ice sheet
The second well being connected to first well that opening's edge is laterally extended；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, is the air of 10 megapascal by injection pressure in first well thereto the second well of a bite, even
The rear enclosed of continuous injection 1 month the second well well head；Then the air that electric heating is injected makes the natural gas of air Yu flammable ice sheet
It burns and heats flammable ice sheet corresponding to second well, when the well head pressure of second well is on the basis of initial well head pressure
When increasing by 20 megapascal, the content for starting the air injected before discharge outward and measuring natural gas in discharged air, when
Igniting emptying when the content of natural gas is 50% in the air discharged, igniting emptying is up to natural gas in the air discharged
When content is 80%, the gas which is discharged inputs gas transmission equipmen.
Embodiment 5
A kind of recovery method of combustible ice of the invention, comprising the following steps:
Step 1, drilling well bores the first well from top to bottom extended at the top of flammable ice sheet, bores 5 in the flammable ice sheet
The second well being connected to first well that opening's edge is laterally extended；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, is the air of 20 megapascal by injection pressure in first well thereto the second well of a bite, even
The rear enclosed of continuous injection 2 months the second well well head；Then the air that electric heating is injected makes the natural gas of air Yu flammable ice sheet
It burns and heats flammable ice sheet corresponding to second well, when the well head pressure of second well is on the basis of initial well head pressure
When increasing by 15 megapascal, the content for starting the air injected before discharge outward and measuring natural gas in discharged air, when
Igniting emptying when the content of natural gas is 65% in the air discharged, igniting emptying is up to natural gas in the air discharged
When content is 85%, the gas which is discharged inputs gas transmission equipmen.
Embodiment 6
A kind of recovery method of combustible ice of the invention, comprising the following steps:
Step 1, drilling well is bored the first well from top to bottom extended at the top of flammable ice sheet, is bored in the flammable ice sheet
The second well being connected to first well that 10 opening's edges are laterally extended；
Step 2, cement the well, casing is set in first and second well, then the outside wall surface of the casing and this first and second
Concreting forms concrete layer between the inner wall of well；
Step 3, the side wall of perforation, concrete layer, casing at least in second well corresponding to flammable ice sheet is adopted
The hole of the inner hole and flammable ice sheet that are connected to the casing is set with perforating gun；
Step 4, it exploits, is the air of 30 megapascal by injection pressure in first well thereto the second well of a bite, even
The rear enclosed of continuous injection 3 months the second well well head；Then the air that electric heating is injected makes the natural gas of air Yu flammable ice sheet
It burns and heats flammable ice sheet corresponding to second well, when the well head pressure of second well is on the basis of initial well head pressure
When increasing by 20 megapascal, the content for starting the air injected before discharge outward and measuring natural gas in discharged air, when
Igniting emptying when the content of natural gas is 70% in the air discharged, igniting emptying is up to natural gas in the air discharged
When content is 90%, the gas which is discharged inputs gas transmission equipmen.
Embodiment 7
The present embodiment and previous embodiment the difference is that, in step 1, the second well from top to bottom layered arrangement, to mention
High security and yield, in addition to this, other are same as the previously described embodiments.
Embodiment 8
The present embodiment and previous embodiment 7 the difference is that, every layer of setting 1-10 second well of mouth, using appropriate quantity
Second well can prevent flammable ice sheet from collapsing to improve yield, improve the efficiency of exploitation, reduce cost, and in addition to this, other are
It is identical as previous embodiment 7.
Embodiment 9
The present embodiment and previous embodiment 7,8 the difference is that, the distance of top surface of the top layer away from flammable ice sheet is can
The one third of ice layer thickness is fired to half, it is not easy to be caused flammable ice sheet to collapse, is conducive to bore the second well, except this it
Outside, other are identical as previous embodiment 7,8.
Embodiment 10
The present embodiment and previous embodiment the difference is that, further include exploiting remaining second well institute according to the step 4
The step of corresponding flammable ice sheet, reduces production cost, in addition to this, other are identical as previous embodiment to improve yield.
Embodiment 11
The present embodiment and previous embodiment the difference is that, second well is radial centered on first well
Arrangement, can more reasonably bore the second well and prevent from collapsing, circumferentially uniformly distributed preferable along the first well, in addition to this, other with it is aforementioned
Embodiment is identical.
In step 4, the temperature of the air injected selects preferably between 200-2000 DEG C, and temperature is excessively high, easily causes to cover
Tube swelling causes gas leakage.
In step 4, the every 30-60 minutes content for measuring natural gas in the air once discharged is preferable.
In step 4, it can be, but not limited to inject air to second well using air compressor, air compressor is installed on
Mobile drilling platforms is preferable.
In step 4, air is injected to the second well, the gas input that second well is discharged after meeting above-mentioned requirements is defeated
Gas equipment, the gas that the second well is constantly discharged can cause the second well to be unsatisfactory for above-mentioned requirements, can be again when there is such case
Air is injected to second well, the gas that second well is discharged after meeting above-mentioned requirements again inputs gas transmission equipmen, such as
This alternately, sufficiently to exploit flammable ice sheet corresponding to second well.
Concrete can be, but not limited to using cement production systD.
Casing can be, but not limited to using petroleum casing pipe.
The quantity of first and second well is not particular value, according to actual needs, can also be other quantity.
It should be noted that each particular technique feature described in above-mentioned specific embodiment, in reconcilable feelings
Under condition, it can be combined by any suitable mode.Each particular technique described in different specific embodiments is special
Sign, in the case of no contradiction, can also be combined by any suitable mode each other.In order to avoid unnecessary
It repeats, the present invention is not described various combinations of possible ways.
Above with reference to embodiment to the present invention have been described in detail, be it is illustrative rather than restrictive, do not taking off
It is within the scope of the present invention from the variation and/or modification under present general inventive concept.
Claims (8)
1. a kind of recovery method of combustible ice, which comprises the following steps:
Step 1, the first well from top to bottom extended is bored in drilling well at the top of flammable ice sheet, is drilled into the flammable ice sheet few
The second well being connected to first well extended transversely flatly；
Step 2, it cements the well, casing is set in first and second well, then in the outside wall surface of the casing and first and second well
Concreting forms concrete layer between inner wall；
Step 3, perforation, the side wall of concrete layer, casing at least in second well corresponding to flammable ice sheet, which uses, to be penetrated
Rifle setting in hole is connected to the inner hole of the casing and the hole of flammable ice sheet；
Step 4, it exploits, 200 DEG C of pressure is greater than or equal to by injection temperature in first well thereto the second well of a bite
More than or equal to the air of 10 megapascal, it is continuously injected into a month rear enclosed of 1-3 the second well well head；When the well head pressure of second well
When increasing 10-20 megapascal on the basis of well head pressure when closing second well, start the sky injected before discharge outward
Gas and the content for measuring natural gas in discharged air, when the content of natural gas in the air discharged is greater than or equal to 50%
When igniting emptying, igniting emptying is until when the content of natural gas is greater than or equal to 80% in the air that is discharged, by second well
The gas input gas transmission equipmen being discharged, alternatively, the duration of temperature and air injection by adjusting injected air,
When single port the second well gas production being made to be no less than annual 1 billion cubic meter, the gas which is discharged inputs gas transmission equipmen；
In the step 1, from top to bottom layered arrangement, the distance of top surface of the top layer away from flammable ice sheet are flammable to second well
The one third of ice layer thickness is to half.
2. the recovery method of combustible ice according to claim 1, which is characterized in that further include being exploited according to the step 4
The step of flammable ice sheet corresponding to remaining second well.
3. the recovery method of combustible ice according to claim 1, which is characterized in that every layer 1-10 mouthfuls described second of setting
Well.
4. the recovery method of combustible ice according to claim 1, which is characterized in that second well is with first well
The radial arrangement in center.
5. the recovery method of combustible ice according to claim 1, which is characterized in that in the step 4, the air that is injected
Temperature be 200-2000 DEG C.
6. the recovery method of combustible ice according to claim 1, which is characterized in that 30-60 minutes every in the step 4
Measure the content of natural gas in the air once discharged.
7. the recovery method of combustible ice according to any one of claims 1 to 6, which is characterized in that in the step 4, adopt
Air is injected to second well with the air compressor for being installed on mobile drilling platforms.
8. a kind of recovery method of combustible ice, which comprises the following steps:
Step 1, the first well from top to bottom extended is bored in drilling well at the top of flammable ice sheet, is drilled into the flammable ice sheet few
The second well being connected to first well extended transversely flatly；
Step 2, it cements the well, casing is set in first and second well, then in the outside wall surface of the casing and first and second well
Concreting forms concrete layer between inner wall；
Step 3, perforation, the side wall of concrete layer, casing at least in second well corresponding to flammable ice sheet, which uses, to be penetrated
Rifle setting in hole is connected to the inner hole of the casing and the hole of flammable ice sheet；
Step 4, it exploits, the sky of 10 megapascal is greater than or equal to by injection pressure in first well thereto the second well of a bite
Gas is continuously injected into a month rear enclosed of 1-3 the second well well head；Then the air that electric heating is injected makes air and flammable ice sheet
Combustion of natural gas and heat flammable ice sheet corresponding to second well, when the well head pressure of second well is in initial well head pressure
On the basis of the air that is injected and measure natural gas in discharged air when increasing 10-20 megapascal, before starting discharge outward
Content, the igniting emptying when the content of natural gas in the air discharged is greater than or equal to 50%, igniting emptying is until arranged
When the content of natural gas is greater than or equal to 80% in the air put, the gas which is discharged inputs gas transmission equipmen；
In the step 1, from top to bottom layered arrangement, the distance of top surface of the top layer away from flammable ice sheet are flammable to second well
The one third of ice layer thickness is to half.
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 |
|---|---|---|---|
| CN201610430858.0A CN106050214B (en) | 2016-06-17 | 2016-06-17 | The recovery method of combustible ice |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106050214A CN106050214A (en) | 2016-10-26 |
| CN106050214B true CN106050214B (en) | 2019-03-29 |
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| CN108071369A (en) * | 2016-11-15 | 2018-05-25 | 梁嘉麟 | The simple type recovery scheme of common seabed combustible ice mineral reserve |
| 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 |
| CN107313752B (en) * | 2017-06-20 | 2019-10-15 | 天津大学 | Combustible ice based on super lubrication gas transport interface fells and transports device and fells and transports method |
| CN108194055B (en) * | 2018-01-03 | 2019-12-10 | 伍丕济 | method for exploiting combustible ice |
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