CN110173241A - A kind of novel separation recovery method in situ of ocean gas hydrate and device - Google Patents
A kind of novel separation recovery method in situ of ocean gas hydrate and device Download PDFInfo
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- CN110173241A CN110173241A CN201910544008.7A CN201910544008A CN110173241A CN 110173241 A CN110173241 A CN 110173241A CN 201910544008 A CN201910544008 A CN 201910544008A CN 110173241 A CN110173241 A CN 110173241A
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- hydrate
- situ
- inner tube
- recovery method
- backfill
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- 238000011084 recovery Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000926 separation method Methods 0.000 title claims abstract description 22
- 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 title claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 11
- 150000004677 hydrates Chemical class 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000004576 sand Substances 0.000 abstract description 10
- 239000003345 natural gas Substances 0.000 abstract description 6
- 239000013535 sea water Substances 0.000 abstract description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- -1 natural gas hydrates Chemical class 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 238000005065 mining Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method 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
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
- E21B7/185—Drilling by liquid or gas jets, with or without entrained pellets underwater
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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Disclosed herein is a kind of novel separation recovery method in situ of ocean gas hydrate and devices, belong to exploiting ocean natural gas hydrates technical field, it mainly comprises the steps that above decentralization riser pipe to hydrate layer mineral, continues to creep into using drill bit Mechanical Crushing, form vertical neck eye；It returns and drags drill string; hydrate ore bed is crushed using the jet hole of arranged tangential, water jets form high speed rotation flow field in exploitation chamber, and hydrate particle and impurity sand grain are layered under the influence of centrifugal force; to separation in situ, cavity is backfilled to positioned at outermost impurity sand grain；Hydrate after the separation recovery pump together with seawater serves sea.The original position that the present invention realizes sea-bottom shallow hydrate is broken, separates, backfill institutional operation, is able to carry out efficient, safety, duration exploitation, and while guaranteeing production efficiency, exploitation tool complexity, promotion backfill stability is effectively reduced.
Description
Technical field
The present invention relates to exploiting ocean natural gas hydrates technical field more particularly to ocean shallow layer gas hydrate are former
Position separation backfill jet stream recovery method and device.
Background technique
The gas hydrates of referred to as " combustible ice " are the unconventional energy resource of a kind of high density, high heating value.It is complete according to statistics
It is total that the carbon content of the total resources of ball gas hydrates is equivalent to the resources such as coal, oil and natural gas known to the current whole world
Twice of reserves.China's ocean gas hydrate Resources Prospect is very wide, only the total resources of Gas Hydrate of The South China Sea
It is equivalent to the half on about China land and offshore oil natural gas gross reserves.
There are four types of the gas hydrates storage forms for being currently known dawn self-assembling formation, respectively sandrock-type, sandstone crack
Type, dispersing type, particulate crack type.It is mainly characterized by burying shallow, cementing weak, most of not fine and close cap rock or completeness
The deep storage lid of state.The successful method of production testing operation has heat shock method, voltage drop method, note chemical-agent technique, CO in the world2Displacement method
And several method is used in combination.But these methods have centainly hydrate cap rock without departing from traditional oil-gas mining thinking
It is required that long-term exploitation may cause potential geological disaster.The basic principle of solid state fluidizing recovery method is not change seabed
Hydrate mineral reserve temperature carries out digging to hydrate deposition ore body and is crushed, backfill in advance through second-time breakage and silt in the case where
Sea is delivered to by closed conveying standpipe afterwards, while extra large exterior heat seawater being introduced into sea risers and is mixed with hydrate particle
It is mixed, to realize Ordered Decomposition of the gas hydrates in standpipe, and then the density of blending agent in standpipe is reduced, generated vertical
Pipe inside and outside differential pressure, and then realize the lifting certainly of blending agent in standpipe.
According to the buried depth of hydrate resource, solid state fluidizing recovery method can be divided into the exploitation of surface layer solid state fluidizing and shallow-layer
Solid state fluidizing exploitation.Shallow-layer solid state fluidizing mining method needs individual separation module, broken module and recycling module, whole to tie
Structure is complicated, and difficulty of processing is big, at high cost；And backfilling apparatus cannot be opened up in nearly bit part, otherwise because backfill channel it is long and narrow with
It results in blockage, backfill sediment structure intensity is low, easily causes reservoir to collapse, or even the collapsing of hydrate ore bed is caused to cause address calamity
Evil is unfavorable for business and exploits.
Summary of the invention
Aiming at the problems existing in the prior art, it is new for ocean gas hydrate that the object of the present invention is to provide one kind
The recovery method and device that type separates in situ, exploitation reducig equipment configuration complexity increase backfill separative efficiency.
To realize the above goal of the invention, technical scheme is as follows: a kind of novel original position of ocean gas hydrate
Separate recovery method, the exploitation for the non-diagenesis gas hydrates of sea-bottom shallow, which is characterized in that the sea-bottom natural gas water
Closing the novel separation recovery method in situ of object includes:
Step S1: being drilled into hydrate reservoir by intelligent steering Drilling bore bit, forms the vertical neck eye of certain length；
Step S2: it returns and drags intelligent steering Drilling bore bit, and hydrate reservoir is crushed by jet stream spray-hole, is separated
And backfill, the flow field of rotation is formed in the cavities, and hydrate and impurity sand separate under the influence of centrifugal force, and it is outermost to be located at flow field
Layer impurity sand to goaf into
Row compensation backfill；
Step S3: positioned at flow field center hydrate under the effect of gravity, and be recovered module recovery holes sucking internal layer
Among the annular space of pipe and outer layer sleeve, inner tube annular space is changed to by passageway bridge postposition, pump is finally recovered and is lifted to sea
First processing platform simultaneously stores.
A kind of quarrying apparatus of the novel separation recovery method in situ of ocean gas hydrate, is hydrated for ocean natural gas
The novel separation exploitation in situ of object, including it is processing platform at the beginning of sea, marine riser, packer, bimetallic tube, drive module, broken apart
Backfill module, recycling module, intelligent steering Drilling bore bit.
Just processing platform connect for bimetallic tube, marine riser top and sea, using packer shape on the outside of marine riser at the mud layer
At enclosure space, double layer continuous pipe is isolated with seawater.Mud line following double layer continuous pipe in seabed connects drive module, in drive module
Passageway bridge is installed in portion, and the hydrate slurry that upper external layer pipe changes in aerial injection water and inner tube with inner tube is handed over
It changes, inner tube is installed in passageway bridge lower part, and injection water, hydrate slurry are isolated, motor is installed inside inner tube, is lower die
Block provides power, installs outer tube on the outside of passageway bridge, and injection water, hydrate slurry are isolated with seawater.It is connect under drive module
Broken apart backfill module, this module can carry out broken hydrate ore bed, and initial gross separation hydrate and impurity are husky, and impurity is husky
Backfill is in broken cavity.Passageway bridge is installed, by upper external layer pipe and internal layer pipe ring above broken apart backfill inside modules
Injection water in aerial hydrate slurry and inner tube swaps.Inner tube, peace inside inner tube are installed under passageway bridge
Armored pump adsorbs gas hydrate particle pre-separated at broken cavity center, and it is transported upwards.Outside passageway bridge
Side is equipped with outer tube, opens up multilayer jet hole in the outer tube, same layer jet hole using outer tube axle center as rotation center into
Row arrangement, it is interlaced between every layer of jet hole to be arranged, the axle center of all jet holes with the radial rectangular cloth of outer tube
It sets.Broken apart recycling module can be formed in broken cavity using outer tube axle center as the rotational flow field of rotation axis, be broken
Broken hydrate particle is pumped and is inhaled from recovery holes due to the smaller center that will stay on flow field under the influence of centrifugal force of quality
Enter, and impurity sand will be dispersed under the action of the centrifugal force on the outside of flow field since quality is bigger, be filled up the cavity being pooled out, be prevented sky
Chamber collapses.Recycling module is installed, recycling module inner upper installs passageway bridge, by upper external layer under broken apart backfill module
Pipe is swapped with the hydrate slurry in the injection water and inner tube in inner tube annular space.Inner tube is connect under passageway bridge, it will
Injection water is conducted to intelligent steering Drilling bore bit, provides power for it.Outer tube, the outer once Guan Shangkai are installed on the outside of passageway bridge
If multiple rows of recovery holes.
The beneficial effects of the present invention are: recovery process does not change the temperature and pressure of hydrate reservoir, prevents hydrate
The geological disaster of initiation is decomposed in recovery process；Vertical neck eye is formed, and goes back to the side for dragging the broken vertical neck eye of Mining Equipment,
Broken cavity upper surface is avoided to be collapsed by broken impact；One broken apart recycling module has broken apart three kinds of recycling
Function carries out separation in situ, backfill, the rear portion for avoiding the backfill of leading portion digging rear end caused in broken hydrate reservoir cavity
The case where pipeline is buried, exploitation reducig equip complexity, reduce the technology degree and energy of vertical pipe pumping hydrate slurry
Commercial mining cost is saved in consumption.
Detailed description of the invention
A kind of novel separation recovery method schematic diagram in situ of ocean gas hydrate of Fig. 1.
1. seas just processing platform, 2. marine risers, 3. bimetallic tubes, 4. packers, 5. outer tubes, 6. motors, 7. sprays in figure
Perforation, 8. recovery holes, 9. impurity sand, 10. intelligent steering Drilling bore bits, 11. hydrate particles, 12. recycling modules, 13. pump,
14. broken apart backfill module, 15. inner tubes, 16. drive modules, 17. passageway bridges.
Sectional view at A in a kind of novel separation recovery method schematic diagram Fig. 1 in situ of ocean gas hydrate of Fig. 2.
Specific embodiment
The exemplary embodiments for embodying feature of the present invention will be illustrated specifically in the following description.It should be noted that the present invention
There can be different variations in different embodiments, and the present embodiment and attached drawing are only purposes of discussion, not to limit this
Invention.
The embodiment of the present invention is for the novel separation recovery method in situ of ocean gas hydrate, comprising the following steps:
Step S1: lower marine riser 2 processing platform 1 as at the beginning of sea is transferred, after transferring to seabed, intelligent steering Drilling bore bit 10
It leads whole system to continue to creep into the covering mud layer to hydrate reservoir, packer 4 is installed at this time, is fixed in water proof
2 outside of pipe, lower section mining area and seawater are separated.Intelligent steering Drilling bore bit 10 continues vertically to creep into, and in hydrate mine
The vertical neck eye of certain length is formed in layer；
Step S2: returning and drag intelligent steering Drilling bore bit 10, keeps the intelligent steering Drilling bore bit 10 of bottom hanging, sprays water
It is flowed downward by the outer tube 5 and 15 annular space of inner tube of bimetallic tube 3, the passageway bridge 17 through drive module 16 enters inner tube
15, then entered in the annular space of outer tube 5 and inner tube 15 by the passageway bridge 17 of broken apart backfill module 14, finally by
Jet hole 7 is crushed hydrate reservoir, is separated, and forms the flow field of rotation in the cavities.Due to hydrate and impurity sand
Quality is different, and hydrate and impurity sand separate under the influence of centrifugal force, be located at the outermost impurity sand in flow field to goaf into
Row compensation backfill；
Step S3: since the quality of hydrate is smaller compared to the quality of impurity sand, the hydrate positioned at flow field center exists
It is settled under gravity, and the recovery holes 8 for being recovered module 12 suck among the annular space of inner tube 15 and outer tube 5, by returning
17 postposition of passageway bridge for receiving module 12 changes to 15 annular space of inner tube, pressurizes via the pump 13 of broken apart backfill module 14, from
Passageway bridge 17 enters 16 inner tube 15 of drive module and 5 annular space of outer tube, finally by 16 passageway bridge 17 of drive module into
Enter in the inner tube 15 of bimetallic tube 3, processing platform 1 at the beginning of being lifted to sea by pump 13 simultaneously stores.
Claims (6)
1. a kind of novel separation recovery method in situ of ocean gas hydrate, is used for the non-diagenesis gas hydrates of sea-bottom shallow
Exploitation, which is characterized in that the novel separation recovery method in situ of the ocean gas hydrate includes:
Step S1: being drilled into hydrate reservoir by intelligent steering Drilling bore bit (10), forms the vertical neck eye of certain length；
Step S2: it returns and drags intelligent steering Drilling bore bit (10), and hydrate reservoir is crushed by spray-hole (7), is separated
And backfill, water jets form rotational flow field, hydrate particle (11) and impurity husky (9) in the effect of centrifugal force in exploitation cavity
Lower leaf is to separate, and the biggish impurity of quality husky (9) is in the outermost layer of rotational flow field, so that split mined out chamber compensates
Backfill；
Step S3: the lesser hydrate particle of quality (11) under centrifugal force under the action of, the center in flow field, and being recovered
Among recovery holes sucking inner tube (15) of module and the annular space of outer tube (5), internal layer is changed to by passageway bridge c (17) postposition
(15) annular space is managed, (13) recycling is finally pumped and is lifted to the first processing platform (1) in sea and stores.
2. a kind of quarrying apparatus for realizing the novel separation recovery method in situ of ocean gas hydrate described in claim 1,
It is characterized by comprising processing platform at the beginning of sea (1), marine riser (2), packer (4), bimetallic tube (3), drive module (16),
Broken apart backfill module (14), recycling module (12), intelligent steering Drilling bore bit (10).
3. the quarrying apparatus of the novel separation recovery method in situ of ocean gas hydrate according to claim 2, special
Sign is that the drive module (16) inner upper installs passageway bridge a (17), and outer tube is installed on the outside of passageway bridge a (17)
(5), inner tube (15) are installed in downside, are equipped with motor (6) in inner tube (15)；Motor (6) and inner tube (15) coaxially, bridge-type
Channel a (17) and inner tube (15) are coaxial.
4. the quarrying apparatus of the novel separation recovery method in situ of ocean gas hydrate according to claim 2, special
Sign is broken apart backfill module (14) inner upper installation passageway bridge b (17), installation on the outside of passageway bridge b (17)
Inner tube (15) are installed in outer tube (5), downside, are equipped with pump (13) in inner tube (15)；Pump (13) and inner tube (5) coaxially,
Passageway bridge b (13) and inner tube (15) are coaxial.
5. the quarrying apparatus of the novel separation recovery method in situ of ocean gas hydrate according to claim 2, special
Sign is to be equipped with multilayer spray hole (7) in the outer tube (5) of broken apart backfill module (14), each spray-hole (7)
Axial line and outer tube (5) radial shape angle in 90 °, and spray-hole (7) is rotated with outer tube (5) axial line and is arranged, every layer of spray
Perforation (7) is arranged along outer tube (5) axial direction, and every layer of spray-hole (7) interlaced arrangement, and rotation can be generated in digging cavity
Turn of tidal stream field.
6. the quarrying apparatus of the novel separation recovery method in situ of ocean gas hydrate according to claim 2, special
Sign is that the recycling module (12) inner upper installs passageway bridge c (17), and outer tube is installed on the outside of passageway bridge c (17)
(5), inner tube (5) are installed in downside, are equipped with recovery holes (8) in outer tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910544008.7A CN110173241A (en) | 2019-06-21 | 2019-06-21 | A kind of novel separation recovery method in situ of ocean gas hydrate and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910544008.7A CN110173241A (en) | 2019-06-21 | 2019-06-21 | A kind of novel separation recovery method in situ of ocean gas hydrate and device |
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| Publication Number | Publication Date |
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| CN110173241A true CN110173241A (en) | 2019-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113976007A (en) * | 2021-09-23 | 2022-01-28 | 超威电源集团有限公司 | Mixing method of additive and auxiliary materials for paste mixing |
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Application publication date: 20190827 |