CN108071369A - The simple type recovery scheme of common seabed combustible ice mineral reserve - Google Patents
The simple type recovery scheme of common seabed combustible ice mineral reserve Download PDFInfo
- Publication number
- CN108071369A CN108071369A CN201611032710.8A CN201611032710A CN108071369A CN 108071369 A CN108071369 A CN 108071369A CN 201611032710 A CN201611032710 A CN 201611032710A CN 108071369 A CN108071369 A CN 108071369A
- Authority
- CN
- China
- Prior art keywords
- immersible pump
- hole
- combustible ice
- mantlerock
- mineral reserve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
A kind of simple type recovery scheme of common seabed combustible ice mineral reserve, has：From top to bottom combustible ice mineral reserve are clipped in the geologic aspects of wherein most common distribution：Seawater, mantlerock, flammable ice sheet and lower rock stratum；It is characterized in that：Rigid long tube (4) and stretching sea level (output methane) upwards on being set in mantlerock hole, in lower rock stratum hole, there is provided the lower rigid short tubes (6) that its bottom encloses immersible pump (7), immersible pump (7) is to be positioned by dead weight by the back taper basic (8) of themselves bottom with the back taper hole of hole bottom in rock stratum under being arranged on to match；Immersible pump (7) carries out carrying out local reduction for flammable ice sheet and promote it to resolve into methane and water by dedicated external drainage pipeline (2), the simple type recovery method, most construction links can be completed using the simple construction or mounting means of no manpower live assistance.--- key of the invention is：The extraordinary immersible pump for meeting combustible ice exploitation is had been devised by, it is positive that affiliate is waited to go to complete together.
Description
Technical field
The present invention relates to the simple type recovery schemes of common seabed combustible ice mineral reserve.
Background technology
With the huge consumption of especially resource, the mankind start to be faced with the great crises of especially resource in 21 century,
As the big country of energy consumption, Chinese festiva crude oil import alreadys exceed 100,000,000 tons, and the yield of domestic onshore oil gas field is kept reluctantly
Stablize, brainstrust estimation is difficult there can be important breakthrough again in a short time.And gas hydrates, you can combustion ice, as a kind of replacement
The energy by countries in the world, is especially favored by developed country.
By taking the gas hydrates formed in seabed as an example：In 1 DEG C to 20 DEG C of environment temperature, as long as the depth of water is 300
Rice, that is, reach 30 atmospheric pressures, will form gas hydrates, you can combustion ice mineral reserve；And environment higher than above-mentioned temperature or/
With environment less than above-mentioned pressure, the gas hydrate dissociation will be promoted into methane and water.
--- the reserves of combustible ice mineral reserve are 2 times of such as oil combustible mineral reserves in the world, enough population in the world
It uses 1000；Theoretical calculation, 1m3Saturated natural gas hydrate can release 164m at the standard conditions3Methane gas,
And gas hydrates burning only generates CO2And H2O belongs to a kind of rare clean energy.
Extremely abundant combustible ice mineral reserve have been contained in the South Sea seabed of China, however, as other marine sites in the world,
Combustible ice mineral reserve are not extracted, the main reason is that, the cost of winning of combustible ice is very high, about 200 dollars/m3。
So far, there are many " laboratory " method that people find out, and still, are in the exploratory stage, it is difficult to enter
Practical business mining phase that can be on a large scale.
From the point of view of specific technological layer：Combustible ice under production of water needs in many recovery methods to decompose natural gas hydration
The high depth immersible pump being had to during object not yet comes out, i.e., high diving depth (such as：Hundreds of meters of even upper kms) immersible pump
It is difficult to come out due to the containing (not yet solving) of multiple technologies problem.
--- key issue of the existing immersible pump due to not resolving its waterproof sealing can only generally leave the water surface
Several meters remote of underwater use can just receive best effect, be torn open moreover, must also periodically hang and pull on bank in machine progress blowdown pump
Infiltration safeguards (not being the repair after corrupted), " periodically disembarkation safeguard " interval time, at most some months and few then several weeks
Even several days, the diving depth of immersible pump was bigger, then the cycle of above-mentioned " periodically disembarkation is safeguarded " is shorter；Just as it needs " to determine
Phase disembarkation safeguard " this point, people dare not just extravagantly hope using superpower (such as：Myriawatts up to a hundred) immersible pump be used for underwater work
Journey, because the unit weight of extra heavy immersible pump can not possibly be very light, it is difficult to " hang regularly and pull on bank and carry out excluding to ooze
The maintenance of water ".
The content of the invention
The purpose of the present invention or being for key point：
Mainly from solving the problems, such as that above-mentioned most thorny immersible pump sets about, propose that one kind can successfully enter practical rank
Section, for combustible ice, i.e. gas hydrate dissociation is finally obtained into the decompression special exploitation scheme of methane and water needed for people
The cheap methane wanted.
The features of the present invention：
Since the present invention can solve or realize many institutes in above-mentioned " purpose of the present invention " or " key point of the invention "
The problem of stating, this is just for that can allow combustible ice, i.e. gas hydrates entrance mining phase, while may also reach up business on a large scale
Industry melts the degree (having profit) adopted and creates condition.
The features of the present invention：
Since the present invention can realize and solve above-mentioned " purpose of the present invention " and many institutes in " key of the invention "
The problem of stating, this is just that can allow the exploitation of combustible ice, i.e. gas hydrates, can be simultaneously reached commercialization exploitation (favorably
Profit even high profit) degree create condition.
Description of the drawings
Fig. 1 illustrates the distribution situation in the common combustible ice mineral reserve being imbedded in below the rock stratum of seabed in vertical direction
And production facility placement scheme.
1：Discharge duct；2：Higher than the drainage pipeline on sea level；2’：Drainage pipeline higher than mantlerock exports；3：Sealing
The collecting and distributing room of methane (take into account：People carries the odd-job room that oxygen cylinder enters)；4：Upper well passage；5：Flammable ice-out is separated into
Methane and the ice sheet wall after water；6：It goes into the well passage；7：Variable-frequency diving pump；8：The conical bottom basis of adapted water pump；9：Adapted becomes
Frequency immersible pump conical bottom foundation bottom is used for the bottom cave of the broken miscellaneous stone of access；W：It is used in recovery process as non-flammable ice mineral reserve
Reception fall the reception net of broken miscellaneous stone；Dotted arrowIllustrate the flow direction of methane (gas)；Solid arrowIllustrate the flow direction of water.
Specific embodiment
In order to realize the invention described above purpose, intend using following technical solution：
Have：The very abundant underwater combustible ice mineral reserve of reserves, i.e. very abundant gas hydrates in ocean by
It is as follows that a kind of common distribution overview therein is clipped under：
Seawater, mantlerock, flammable ice sheet and lower rock stratum；
It is characterized in that：
First, underwater geological drilling engineering：
The marine site bottom that has flammable ice sheet is being verified, the hole that diameter is more than 7 outer diameter of immersible pump is drilled out downwards in mantlerock,
Through after flammable ice sheet, lower rock layer surface of going directly, then drilled out and 7 bottom back taper basis of water pump, 8 identical taper in lower rock stratum
Cave, and also in the taper cave, bottom drills out the small cave 9 for being used to store broken miscellaneous stone again；--- the setting in the cave 9
Purpose is to improve above-mentioned " goodness of fit ".
2nd, the exploitation engineering plan of establishment：
Rigid long tube 4 and sea level is stretched out upwards, connect with closed methane collection device 3 on being set in mantlerock hole
It is logical, and externally exported by discharge duct 1 for people to use.
If --- upper rigidity long tube 4 diameter less (such as：Several meters or so) when, mantlerock hole can be inserted by lifting
Interior positioning, the live assistance which may not need manpower can just be completed.
In lower rock stratum hole, there is provided the lower rigid short tubes 6 that its bottom encloses immersible pump 7.
If --- lower rigidity short tube 6 diameter less (such as：Several meters or so) when, lower rock stratum hole can be inserted by lifting
Interior positioning, the live assistance which may not need manpower can just be completed.
The immersible pump 7 is by back taper basis 8 of the dead weight by themselves bottom and rock under being arranged on to match
What the back taper hole of layer hole bottom was positioned.
If --- immersible pump 7 belong to minicomputer (such as：One people can lift it), then, 7 bottom of immersible pump
The basic 8 bottom back taper holes identical with it of back taper position fixing process, being can be in the simple of no manpower live assistance
Form of construction work carries out.
Immersible pump 7 is connected with dedicated drainage pipeline 2, it can be exported from the close drainage pipeline in mantlerock surface is left
2 ' directly discharge clean waste water to external seabed, can also be externally expelled directly out clearly by stretching out the drainage pipeline 2 on sea level
Clean waste water.
--- if drainage pipeline 2 is served as using the plastic flexible pipe that can be rolled (after stretching in exploitation deep-well part
Drainage pipeline 2 is can be used as to use), then the setting of the partial drainage pipeline 2 may be employed the simple of no manpower live assistance and apply
Work mode carries out.
In the over top of immersible pump 7, the crushed stone filter screen disk W that can be extracted from top sea level location is provided with,
Whenever needing to remove flammable ice sheet and erecting wall and melt (resolving into methane and water), i.e., methane decomposition is few with being scattered during water process
During number crushed stone, people just can be on the premise of oxygen cylinder be carried, and the upper rigid long tube 4 out of methane collection device 3 stretches out sea
On the initial position of plane, the crushed stone filter screen disk W of mining depth underground is hung and pulls and is received crushed stone therein
Migration elsewhere abandons collection again.
So far, it is not difficult to find out：If the engineering of small production combustible ice to be used, most construction links or even complete
The construction link in portion can be carried out using the simple form of construction work of no manpower live assistance.It specifically refers in above-mentioned text and breaks folding
Related description content after number " --- ".
--- obviously, the methane collection device 3 divides except being exclusively used in collecting in upper rigid long tube 4 from the combustible ice of seabed
The methane gas of solution out, meanwhile, it also takes into account and people is allowed to carry oxygen cylinder enter as seal operation room to use, that is, take into account and allow people
The operating room of the operations such as above-mentioned crushed stone is removed herein to use.
The dynamic process of present invention exploitation combustible ice：
First, (starting stage is in) first, by calculating the substantially true standard mineral reserve borehole wall gross area energy of flammable ice sheet
Enough ensure：When immersible pump 7 by the borehole wall gross area of entire combustible ice mineral reserve the starting stage (perimeter of upper rigidity long tube 4 with
The product of the thickness of the flammable ice sheet at place), it becomes possible to it allows：Pass through (pair for the extraneous water body that immersible pump 7 is subject at this time of immersible pump 7
Interior osmotic pressure is great --- the waterproof sealing method of the prior art be definitely be difficult to it is competent) by the seawater of entire mine
After all discharging so that：The flammable ice sheet of mine is in close to 1 into the environment of several atmospheric pressures, will be forced
Combustible ice is decomposed into methane and water.--- afterwards：Methane gas is moved upward in methane collection device 3, and then just from sea
User's use is transported in above exhaust pipe 1；And water is just externally discharged from drainage pipeline 2 naturally.
2nd, then (be in normal operating phase), when the water level in combustible ice mine due to constantly drawing water for immersible pump 7 and
When being down to " the shaft bottom horizontal plane of control " that is higher than 7 top of immersible pump anticipated shown in Fig. 1, water pump stops arranging upwards
Water ... ... afterwards, just by the start and shutdown of immersible pump 7, is maintained the position of " the shaft bottom horizontal plane of control ".——
Obviously, must be requested that：The displacement of immersible pump 7 should be higher than the several times of the mineral reserve borehole wall starting stage gross area of flammable ice sheet
；Because during combustible ice is constantly resolved into methane and water, the position of the nearly mine of the combustible ice will by by
Empty to step, you can methane decomposition and the internal surface area of water can be increasingly bigger contacted with low pressure power, methane decomposition and water
Speed also can be increasing, in order to be maintained the height of above-mentioned " the shaft bottom horizontal plane of control ", must just increase immersible pump 7
Draining power.
--- recovery process according to the present invention understands that the immersible pump 7 of such high request not yet comes out, and therefore, " should not ask
Generation " is also one of to cause the reason for the cost of its cost of winning is considerable；It is had been devised by terms of metering university of China
It can be suitble to immersible pump 7 structure of such high request, positive wait cooperatively allows it to come out with partner.
3rd, according to the present invention in the dynamic process of above-mentioned exploitation combustible ice, it is characterised in that：The immersible pump 7 is necessary
There is the liquid pump for much surmounting the prior art, this surmount refer to that the waterproof sealing degree of the immersible pump 7 can reach will
Asking be：
A, can persistently slip into any depth underwater operation or idle accumulated time at 15 years or more；
B, the machine of tearing open that need not debark in the lasting diving time section of 15 years or more carries out the maintenance workers to seep water in blowdown pump
Make.
--- above " 15 years " are primarily referred to as the disposable service life of the dragging motor in adapted immersible pump 7, and
The service life of the waterproof sealing effect in immersible pump 7 after change is infinitely great.
--- recovery process according to the present invention understands that the immersible pump 7 of such high request not yet comes out, for this purpose, " should not ask
Generation " is also one of to cause the reason for the cost of combustible ice cost of winning is considerable；It has been set in terms of metering university of China
7 structure of immersible pump of such high request can be suitble to by having counted out, and positive wait cooperatively allows it to come out with partner, and technology is detailed
See the content of " patent of invention " application number " 201610915144.9 ".
Claims (2)
1. a kind of simple type recovery scheme of common seabed combustible ice mineral reserve, has：From top to bottom combustible ice mineral reserve are clipped in wherein most
The geologic aspects of common distribution：Seawater, mantlerock, flammable ice sheet and lower rock stratum；
It is characterized in that：
First, the underwater geological drilling engineering being related to：
The marine site bottom that has flammable ice sheet is being verified, the hole that diameter is more than immersible pump (7) outer diameter is being drilled out downwards in mantlerock, wears
After crossing flammable ice sheet, lower rock layer surface of going directly, then the cone identical with water pump (7) bottom back taper basic (8) is drilled out in lower rock stratum
Shape cave, and also in the taper cave, bottom drills out the small cave (9) for being used to store broken miscellaneous stone again；
2nd, the exploitation engineering plan of establishment being related to：
Rigid long tube (4) and sea level is stretched out upwards, connect with closed methane collection device (3) on being set in mantlerock hole
It is logical, and externally exported by discharge duct (1) for people to use.
In lower rock stratum hole, there is provided the lower rigid short tubes (6) that its bottom encloses immersible pump (7).
The immersible pump (7) is by back taper basic (8) of the dead weight by themselves bottom and rock under being arranged on to match
What the back taper hole of layer hole bottom was positioned.
Immersible pump (7) is connected with dedicated drainage pipeline (2), it can be exported from the close drainage pipeline in mantlerock surface is left
(2 ') directly discharge clean waste water to external seabed or the drainage pipeline (2) by stretching out sea level is externally expelled directly out
Clean waste water.
Over top in immersible pump (7) is provided with the crushed stone filter screen disk (W) that can be extracted from top sea level location；
The exploitation engineering plan of establishment being related to, if small production engineering installation scheme to be used, the overwhelming majority apply
Work link, even all of construction link can be carried out using the simple form of construction work of no manpower live assistance；
The methane collection device (3) decomposites what is come except being exclusively used in collecting in upper rigid long tube (4) from the combustible ice of seabed
Methane gas, meanwhile, it also takes into account and people's carrying oxygen cylinder is allowed to enter as seal operation room to use, that is, take into account and people is allowed to remove herein
The operating room of above-mentioned crushed stone operation uses；
The immersible pump (7) has the function of to surmount the prior art.
2. a kind of simple type recovery scheme of common seabed combustible ice mineral reserve as described in claim 1, which is characterized in that described
Immersible pump (7) have the function of that surmounting prior art liquid pump refers to what the waterproof sealing degree of the immersible pump (7) can reach
It is required that it is：
A, can persistently slip into any depth underwater operation or idle accumulated time at 15 years or more；
B, need not debark the maintenance work torn open and seeped water in machine blowdown pump in the lasting diving time of 15 years or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032710.8A CN108071369A (en) | 2016-11-15 | 2016-11-15 | The simple type recovery scheme of common seabed combustible ice mineral reserve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032710.8A CN108071369A (en) | 2016-11-15 | 2016-11-15 | The simple type recovery scheme of common seabed combustible ice mineral reserve |
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| CN108071369A true CN108071369A (en) | 2018-05-25 |
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