CN103628880B - The green mining system of deep seafloor shallow-layer non-diagenesis formation gas hydrate - Google Patents
The green mining system of deep seafloor shallow-layer non-diagenesis formation gas hydrate Download PDFInfo
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Abstract
The invention discloses a kind of green mining system of gas hydrates, for the exploitation of gas hydrates on the non-diagenesis stratum of deep-sea shallow-layer, it comprises: seabed driving fluidisation promotes sled: in order to the storage area at gas hydrates, with the temperature and pressure in natural environment, solid-state form digging gas hydrates, gas hydrates solid matter is carried out collecting and being broken for particle, seawater and particle are mixed to form gas-liquid-solid multiphase mixture stream by injection; Airtight fluidisation gathering line: comprise closed conduit, closed conduit and seabed are tunneled fluidisation and are promoted to prize and be connected that gas-liquid-solid multiphase mixture stream is promoted to sea; Sea separating and treating apparatus: be arranged at sea back-up system, comprises the device be separated the gas-liquid-solid multiphase mixture being promoted to sea by closed conduit and the treating apparatus processed separator.Present invention achieves the safety of deep-sea gas hydrates, lasting exploit, avoid the potential danger of many aspects.
Description
Technical field
The present invention relates to unconventional petroleum resources development technique field, particularly relate to a kind of gas hydrates green mining system that the gas hydrates for deep-sea shallow-layer non-diagenesis stratum are developed.
Background technology
Along with growing continuously and fast of Chinese national economy, energy supply and demand contradiction, within 2012, China's imported crude oil reaches 2.07 hundred million tons, becomes second-biggest-in-the-world crude oil import state, external dependence degree reaches 56.7%, approaches or exceedes internationally recognized energy security line.Therefore, while the exploration and development dynamics strengthening oil gas new district frontier, finding Novel connecting has become the grand strategy behave ensureing national energy security and national security for the energy.
The exploration and development of the unconventional petroleum resourceses such as shale oil gas, coal bed gas and gas hydrates utilize for realize China's energy industry sustainable development undoubtedly tool be of great significance.This clearly defines in the major fields of " National Program for Medium-to Long-term Scientific and Technological Development (2006-2020) " " Natural Gas Hydrate Technology is cutting edge technology field ".
Gas hydrates are white crystalline " cage compound " (Clathrate) that the hydrocarbon gas such as methane or volatile liquid and water are formed under high pressure low temperature condition, and its appearance is as ice, and a bit just combustion, is therefore called as " combustible ice ".The molecular formula of gas hydrates is CH
46H
2o.High density, high heating value, distribution are extensively the distinguishing features of gas hydrates, and the gas hydrate dissociation of a usual unit volume can produce the methane gas of 164-180 unit volume.Gas hydrates are mainly distributed in land-based area permafrost and marine site, deep-sea, the reserves of its mesopelagic (200 meter Dao1000 meter Shui Shen) Gas Hydrate In Sea Areas are about 100 times of land, total amount reaches 7.6 × 1,018 cubic metre, be 2 times of known conventional fossil fuel (coal, oil, natural gas etc.) reserves, being therefore considered to 21 century most potentially takes over the energy.
Gas Hydrate In Sea Areas is mainly distributed in Amalgamated continent edge continental slope, passive continental margin continental slope, seamount, inland sea and marginal sea Deep Water Basins and sea floor spreading basin, meet surface deposit or sedimentary rock that hydrate generates Temperature-pressure Conditions, also may be interspersed in ocean floor and occurs with graininess.
The gas hydrates of current discovery mainly exist with four kinds of forms: sandrock-type hydrate, sandstone crack type hydrate, particulate crack type hydrate, decentralized hydrate, wherein sandrock-type hydrate can adopt the method such as step-down, heat injection to develop, and particulate crack type hydrate, decentralized hydrate total amount are large, account for about 80% of overall hydrate resource, but owing to having the features such as buried depth is shallow, cementing properties is poor, said method cannot be adopted to exploit.
The gas hydrates on deep-sea shallow-layer non-diagenesis stratum have the feature of large, weak cementing, the poor stability of reserves, once the temperature of region, pressure condition change, just may cause a large amount of decomposition, the gasification of the gas hydrates on deep seafloor non-diagenesis stratum and freely discharge, as adopted the exploitation method of prior art to exploit, there are the potential risks of following three aspects:
1) the weak cementing unordered decomposition of gas hydrates on deep seafloor shallow-layer non-diagenesis stratum, the geological disasters such as potential submarine landslide may be brought, simultaneously, even the gas hydrates on the good diagenesis stratum of cementing properties, because gas hydrates does not have obvious tectonic boundary and tight cap rock, along with gas hydrates scale development, earth formation becomes evacuation by starting, and subsea strata may be caused unstable;
2) the gas hydrates main decomposition on the non-diagenesis stratum of deep-sea shallow-layer is natural gas and water, and a large amount of natural gas can cause greenhouse gases effect, causes damage to atmospheric environment;
3) due to the decomposition of gas hydrates, cause the unordered release of a large amount of natural gas, the free wxpansion of a large amount of gas is risen and all may be caused disaster to sea ship and airborne aircraft.
In existing exploitation of gas hydrates technology, usually by step-down heat injection Gas Hydrate deep-sea with certain storage cap rock such as injecting be gas and water at in-situ conversion, the gas obtained after conversion is collected, produced by underwater production facility or floating production facility again, this method can only be adapted to the exploitation of deep water diagenesis gas hydrates, current production efficiency also cannot meet the thresholding of commercial development, and this method also cannot realize the exploitation of the weak cementing gas hydrates of deep water shallow-layer simultaneously
In sum, no matter the gas hydrates on cementing good diagenesis stratum, or the gas hydrates on cementing poor non-diagenesis stratum, in the exploitation method at home and abroad studied and Mining Equipment technology, the problem of above-mentioned three aspects is all effectively solved on stream.
, effectively must protect environment while carrying out development of resources meanwhile, and the safety of exploitation; also be the important problem in one, development of resources field; therefore, need a kind of green mining system, realize the exploitation of gas hydrates to non-diagenesis stratum, deep-sea.
Summary of the invention
For problems of the prior art, object of the present invention is the green mining system of a kind of gas hydrates being provided for deep-sea non-diagenesis formation gas hydrate exploitation, to avoid the potential risk of above-mentioned three aspects in the mining system of prior art.
For achieving the above object, technical scheme of the present invention is as follows:
A green mining system for gas hydrates, for the exploitation of the gas hydrates on the non-diagenesis stratum of deep-sea shallow-layer, described green mining system comprises sea back-up system, and the green mining system of described gas hydrates also comprises:
Seabed driving fluidisation promotes sled: in order to the storage area at described gas hydrates, with the temperature and pressure in natural environment, gas hydrates described in digging in solid form, the solid matter of described gas hydrates is carried out collecting and being broken for particle, seawater and described particle are mixed to form gas-liquid-solid multiphase mixture stream by injection;
Airtight fluidisation gathering line: comprise closed conduit, described closed conduit and described seabed are tunneled fluidisation and are promoted to prize and be connected that described gas-liquid-solid multiphase mixture stream is promoted to sea;
Sea separating and treating apparatus: be arranged at described sea back-up system, comprises the separator that is separated the described gas-liquid-solid multiphase mixture being promoted to sea by closed conduit and the treating apparatus processed gained separator after being separated
Beneficial effect of the present invention is: the mining system of gas hydrates of the present invention, utilize the stability of gas hydrates under bottom-water temperature and pressure on diagenesis stratum, deep-sea, adopt solid-state mining system, because whole mining process carries out in territory, sea bottom hydrate Tibetan area, do not change the temperature, pressure condition of hydrate, therefore hydrate can not decompose, thus achieves the solid-state exploitation of original position, avoids the potential danger of above-mentioned three aspects.
Green mining system of the present invention, make use of the natural trend of gas hydrates temperature, pressure in transmitting procedure, realizes the controlled Ordered Decomposition of the solid-liquid-gas mixture in closed conduit simultaneously.Meanwhile, local use seawater, carries out seawater injection in confined conditions, forms gas-liquid-solid multiphase mixture stream and realize closed conveying after digging being gone out hydrate pulverizing grinding; The induction system of whole closed conduit, be equivalent to conventional gas and oil hide, thus guarantee production safety, reach the object of green controlled exploitation, avoid the potential danger of above-mentioned three aspects, fundamentally avoid geology and environmental hazard that gas hydrate dissociation that the problems such as various environmental changes cause brings.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the green mining system of the gas hydrates of the embodiment of the present invention.
Fig. 2 is that the gas hydrates of the green mining system of the gas hydrates of the embodiment of the present invention move towards schematic diagram.
Fig. 3 is the device connection diagram of the green mining system of the gas hydrates of the embodiment of the present invention.
Detailed description of the invention
The exemplary embodiments embodying feature & benefits of the present invention will describe in detail in the following description.It should be understood that the present invention can have various changes in different embodiments, it neither departs from the scope of the present invention, and explanation wherein and accompanying drawing are the use when explain in itself, and is not used to limit the present invention.
The green mining system of the deep-sea shallow-layer gas hydrates of the embodiment of the present invention, its thinking realized and principle are: weak for deep-sea shallow-layer cementing gas hydrates is used as a kind of seabed mining deposits, utilize its stability under the temperature and pressure of the natural environment in seabed, adopt solid-state mining system, namely heading equipment is adopted, with the pressure and temperature in natural environment, develop hydrate in solid form to hide, after deposit containing hydrate is ground into fine particle, again with sea water mixing, closed conduct is adopted to be delivered to surface platform, thereafter it is carried out post-processed and processing at sea back-up system, as shown in Figure 1.
Conventional gas and oil hides the control by trap structure, can realize the orderly control of recovery process.And the mining system of gas hydrates of the present invention, be that uncontrollable for deep-sea shallow-layer non-diagenetic water compound is hidden, by the airtight fluidisation hoisting system of digging, become controlled natural gas hydrate resources, thus guarantee production safety, reach the object of green controlled exploitation.
Lower mask body introduces the green mining system of the gas hydrates of the embodiment of the present invention.
As shown in Figure 1-Figure 3, the green mining system of the gas hydrates of the embodiment of the present invention, the seabed driving fluidisation being included in sea bed operation promotes sled 1, the airtight fluidisation gathering line carried to sea by sea bed and these three parts of sea separating and treating apparatus in operations offshore.Below make introductions all round:
One, driving fluidisation in seabed promotes sled
It is at the storage area of deep-sea shallow-layer gas hydrates gas hydrates described in digging in solid form that seabed driving fluidisation promotes sled 1, and pulverizes described gas hydrates for after particle, becomes gas-liquid-solid multiphase mixture stream with sea water mixing.Storage area mentioned here is also production zone.
As shown in Figure 3, seabed driving fluidisation promotes sled 1 and comprises mole, mixed pipe line, supercharging device and monitoring device, and mole then comprises fuselage, running mechanism, once broken rock machinery and collecting.
Wherein, running mechanism is arranged at fuselage bottom; Mechanism out of shape is such as crawler type running mechanism, but the present invention is not as limit.
Once broken rock machinery is arranged at the front of fuselage, and once broken rock machinery comprises the broken rock cylinder 16 of front lower that the spiral be arranged on the upside of described fuselage front breaks rock machinery 18 and is arranged on described fuselage.The top of broken rock cylinder 16, is provided with overflow gas collection cap 17, with by overflow gas collection in collecting, avoid producing large impact to the pressure of production zone.
Collecting is then built in described fuselage, be mechanically connected with once broken rock, to collect the gas hydrates once broken after rock Mechanical Crushing; Secondary breaks rock machinery 15 and is arranged in collecting, and the gas hydrates after once breaking the first time fragmentation of rock machinery are carried out second time fragmentation to form particle.
Mixed pipe line, be then connected to described collecting, and the described gas hydrates of described mole digging and sea water mixing are formed described gas-liquid-solid multiphase mixture stream.
Supercharging device is such as the mortar screw pump 11 for supercharging, for the transmission supercharging for mixed pipe line.
Promote in sled in seabed driving fluidisation and be provided with monitoring device, for the temperature and pressure of Real-Time Monitoring storage area, owing to being solid-state mining, therefore, the temperature and pressure easily maintaining storage area is the pressure and temperature of the original storage ambient of gas hydrates.Here monitoring device such as comprises temperature pick up, pressure sensor and control device.By the sea on sea, the equipment station service power of the temperature and pressure of monitoring production zone here, can support that the sea back-up system such as ship or sea supporting platform carrys out responsible supply.The control device of monitoring device, also can be arranged on sea and support ship or sea supporting platform.
The storage area being gas hydrates in seabed due to whole mining process is carried out, do not change the temperature, pressure condition of hydrate, therefore can ensure that gas hydrates keep solid-state and can not decompose, thus achieve the solid-state exploitation of original position, avoid the potential danger of above-mentioned three aspects.
It is that large area is attached to seabed and has certain thickness that mode feature is deposited in tax in view of hydrate.Therefore, the seabed driving fluidisation of the green mining system of the embodiment of the present invention promote sled adopt the external spiral under water of mole to break mode that rock machinery and broken rock cylinder combine carries out Mechanical Crushing.Because this mining method is not changing the Mechanical Crushing under hydrate temperature, pressure field condition, gas hydrates all can keep original solid-state form with prime stratum state after primary fragmentation.Then, by through first time broken solid-state form gas hydrates be sent to the built-in secondary of the fuselage of mole and break rock machinery 15 and carry out second time fragmentation, be broken into and be less than or equal to 100 object particles.Secondary breaks rock machinery 15 and provides power by electric direct-drive pump 14.
Solid water compound is fluidized to mortar along with spiral breaks rock machinery containing sand hydrate by the bulky grain after fragmentation in mixing duct together with seawater, enters airtight fluidisation gathering line.In seabed, driving fluidisation promotes in the mixed pipe line of sled, mix with particle with seawater, here seawater, not directly the seawater at deep-sea is directly mixed with the particle after digging fragmentation, but the seawater of sea certain depth is first promoted to sea by seawater lift and control unit, then as shown in Figure 3, be delivered in mixed pipe line, as described in Figure 3, seawater, through strainer 13, pumps into closed conduit hypomere 23 by reciprocating pump 12, and seawater is mix with the particle after twice fragmentation on the one hand, for it provides lubrication, become mortar; On the other hand by seawater ejector action for the flowing of mixed solid-liquid-gas mixing logistics provides power.
Solid water compound is fluidized to hydrate mortar (also i.e. solid-liquid-gas hydration logistics) along with spiral breaks rock machinery containing sand hydrate by the bulky grain after fragmentation together with seawater, also namely liquid-solid mixture stream is mixed to form by seawater injection, in mixed process, partially hydrated thing discharges from solid particle, be converted into gas and water, therefore, after mixed process, define gas-liquid-solid multiphase mixture stream, enter the closed conduit of fluidisation induction system.
The seabed driving fluidisation of the present embodiment promotes sled 1, and be gas hydrates digging under water, collection, grinding, conveying seabed installation, it utilizes the cutter of efficiency crushing sea bed, can adapt to seabed high pressure height corrosive environment.Can effectively by the mud of sea bed, stone is broken into the fragment of certain degree, to adapt to the collection in later stage.Spiral wherein breaks rock machinery, and adopt spiral to break the mode of rock, horizontal broken collects hydrate mineral reserve.And secondary breaks rock machinery 15, be the device that combustible ice is stirred in the fragmentation arranged in seabed installation, further by collected combustible ice mixture process uniformly density, to be pumped into the closed conduit of airtight fluidisation gathering line.
Seabed driving fluidisation promotes sled 1 and adopts wet type to be electrically connected with electric power system, namely in the energized state, can under water in environment wet type plug, it is mainly through in plug process, and cable supplies dielectric and nitrogen, realizes electric insulation.
Two, airtight fluidisation gathering line
The effect of airtight fluidisation gathering line is, by closed conduit, described gas-liquid-solid multiphase mixture stream is promoted to sea (or claiming marine).
The green mining system of the gas hydrates of the embodiment of the present invention, comprises closed conduit, supercharging prizes 22 Sum decomposition control device.Wherein closed conduit comprises with supercharging sled 22 be boundary epimere 21 and hypomere 23.
Wherein, closed conduit is the airtight long-distance transmission pipeline of gas hydrates mortar, closed conduit has seal, pressure-bearing property, pliability, and closed conduit can with the supercharging of pressurization system prize 22 and sea support that ship is connected fast, keep certain buoyancy simultaneously.
The power that solid-liquid-gas mixing logistics promotes in closed conduit, mainly comes from supercharging device, also can come from the ejector action of seawater, and decompose control device control mixture in closed conduit decompose produce gas from castering action.Below describe respectively.
At deep-sea shallow-layer, being installed in addition with of one-level only can be set and put and supercharging sled 22 is not set.And in deep-sea deep layer, after residing for gas hydrates, the depth of water exceedes certain depth, the supercharging device of one-level is not enough to the hydrate mortar in closed conduit to give rise to sea, can closed conduit medium position arrange supercharging sled 22 as water in supercharging equipment, supercharging sled 22 can be arranged on distance depth of water place, about 300 meters, sea, but the present invention is not limited with supercharging sled 22, also can arrange supercharging equipment in the water of other types.
In water, supercharging promotes sled and supports that ship hangs to the required depth of water by sea (or claiming the water surface), is connected fast to carry out supercharging by supercharging sled 22 with the closed conduit of airtight fluidisation gathering system.Supercharging sled 22 can be made up of manifold system and screw pump, as required can single pump or many pumps pressure-increasing unit.By sea, the supply of electric power of supercharging sled 22 supports that ship supplies.
Except supercharging sled 22, utilize the pressure, temperature variation in closed conduit course of conveying, the portion of natural gas hydrate natural decomposition in solid-liquid-gas mixing logistics can be realized, uncontrollable for deep-sea shallow-layer non-diagenetic water compound is hidden and becomes controlled hydrate resource by digging airtight fluidisation hoisting system, the induction system of whole closed conduit is equivalent to conventional gas and oil and hides, thus guarantee production safety, reach the object of green controlled exploitation; Its essence is and change the uncontrollable gas hydrates of non-for seabed diagenesis in closed conduit controllable gas hydrates, closed conduit system is just equivalent to the fine and close cap rock that conventional gas and oil is hidden.Therefore, the pressure of described gas-liquid-solid multiphase mixture stream in lifting process controlled in closed conduit by decomposing control device changes and variations in temperature, can make the described gas hydrates natural decomposition of the part in gas-liquid-solid multiphase mixture stream.The gas pressure supercharging that formed after the gas that gas hydrate dissociation produces and water, particularly gas hydrate dissociation, makes the density of the solid-liquid-gas mixing logistics in closed conduit reduce, can realize part hydrate slurry from gaslift.
Three, sea separating and treating apparatus
The effect of sea separating and treating apparatus is separated the described gas-liquid-solid multiphase mixture being promoted to sea by closed conduit and processes, and isolates natural gas.
The green mining system of the gas hydrates of the embodiment of the present invention, its sea separating and treating apparatus comprises separator, treating apparatus, well head integrity control device, storage device and conveying device.
Above-mentioned sea back-up system, can be sea and supports ship or sea supporting platform, be arranged on the sea of production zone, and sea supports that gear has characteristic flexibly, can reuse at different production zones.But the present invention is not as limit.Also sea supporting platform can be built on the sea of production zone, with the effect replacing sea to support ship.
The green mining system of the embodiment of the present invention, its sea separating and treating apparatus can be arranged on above-mentioned sea and support on ship or sea supporting platform, but sea is supported ship or sea supporting platform are not limited to arrange sea separating and treating apparatus, can also arrange dynamical system, shearing device, seawater lift and control unit etc.The supervisory control desk of the green mining system of the embodiment of the present invention, also can be arranged on sea and support ship or sea supporting platform.
For dynamical system, the electric power that the electric power of supercharging sled 22 and seabed driving fluidisation promote sled is supplied by dynamical system.Such as, spiral breaks the motor 19 of rock machinery 18, the broken motor of rock cylinder 16 and the electric power of electric direct-drive pump 14 and supplies by dynamical system.
And shearing device, under emergency conditions, the power source that closed conduit carries out solid-liquid-gas mixing logistics lifting can be cut off, utilize silt gravitational settling in closed conduit, realize nature pressure " well ", power source mentioned here, comprises the power source of booster pump and the power source of supercharging sled 22, also can cut off the power source of seawater lift and injection simultaneously.
After gas-liquid-solid multiphase mixture stream being risen to sea by closed conduit, the well head of conventional oil field can be regarded as.Owing to having the natural gas of certain pressure in closed conduit, therefore, devise well head integrity control device, it comprises linkage and emergent cutoff device, and the end of closed conduit and sea are supported that ship is connected to carry out well head integrity control by linkage.Emergent cutoff device is arranged on closed conduit end and supports before and after the linkage that ship is connected, such as, to be arranged on emergent shut-off valve 35 with sea, with timely under emergency conditions, sea is supported that ship separates with closed conduit, ensures the safety of mining operations.
Above-mentioned emergent cutoff device can mainly comprise, and is arranged on shut-off valve 35 and the pressure and temp monitoring system of closed conduit end, when pressure in closed system temperature occur abnormal or support that emergency work condition appears in ship time, close shut-off valve 35, ensure security of system; In addition, sea is supported also can be connected with multi-function emergency operating mode automatic unbuckling system between ship and closed conduit, at typhoon etc. in emergency circumstances, supports ship quick-release with sea.
Sea separating and treating apparatus, as the terminal of whole recovery process, is responsible for collection and the post-processed of natural gas/undecomposed gas hydrates/seawater completely/silt multiphase pipe flow mixture.
Separator comprises settlement separator 31 with pressure and cyclone separator 32, cyclone separator 32 is connected to the separator output of settlement separator 31 with pressure, isolated separator except seawater, silt or ore in sand form all enters cyclone separator 32, and the separator output of cyclone separator 32 connects natural gas treatment plant 33.And the separator output of silt or ore in sand form is connected with backfill pipeline, for silt or ore in sand form are backfilled to seabed.Silt after eliminator with pressure is separated or the silt of ore in sand form and cyclone separator 32 or ore in sand form backfill sea after treatment on the spot.Both can use same backfill road through backfilling.After being separated, ore in sand form and silt backfill on the spot, can keep seabed original appearance, avoid Secondary Geological Hazards.
Therefore, first multiphase mixture enters settlement separator 31 with pressure and carries out sedimentation separation with pressure, and silt is by Action of Gravity Field sedimentation separation, and natural gas and water obtain initial gross separation, and due to certain pressure, eliminator is provided with pressure safeguard system.
Then, natural gas after settlement separator 31 with pressure just divides and liquid enter gas-liquid cyclone separator 32 and carry out rotational flow separation, cyclone separator 32 centrifugal action is utilized to realize being separated further, natural gas after separation enters natural gas treatment plant 33, separating obtained natural gas liquid is turned to liquefied natural gas (LNG), enter LNG treatment system 34, such as, enter in storage device and store, or outwards carried by conveying device.
The separating obtained seawater of said mixture enters the step in ocean again after seawater treatment apparatus process is qualified, in order to avoid pollute ocean.
The mining system of the gas hydrates of the embodiment of the present invention, utilizes the stability of gas hydrates under bottom-water temperature and pressure on diagenesis stratum, deep-sea, adopts solid-state mining system.Because whole mining process carries out in territory, sea bottom hydrate Tibetan area, do not change the temperature, pressure condition of hydrate, therefore hydrate can not decompose, thus achieves the solid-state exploitation of original position, avoids the potential danger of above-mentioned three aspects.
Meanwhile, the mining system of the gas hydrates of the embodiment of the present invention, local use seawater, carries out seawater injection in confined conditions, forms gas-liquid-solid multiphase mixture stream and realize closed conveying after digging being gone out hydrate pulverizing grinding; The induction system of whole closed conduit, be equivalent to conventional gas and oil hide, thus ensure that production safety, reach the object of green controlled exploitation, avoid above-mentioned three to endanger greatly, fundamentally avoid geology and environmental hazard that gas hydrate dissociation that the problems such as various environmental changes cause brings.
The change that those skilled in the art do when should recognize the scope and spirit of the present invention disclosed in the claim do not departed from appended by the present invention and retouching, within the protection domain all belonging to claim of the present invention.
Claims (17)
1. a green mining system for gas hydrates, for the exploitation of the gas hydrates on the non-diagenesis stratum of deep-sea shallow-layer, described green mining system comprises sea back-up system, it is characterized in that, the green mining system of described gas hydrates also comprises:
Seabed driving fluidisation promotes sled: in order to the storage area at described gas hydrates, with the temperature and pressure in natural environment, gas hydrates described in digging in solid form, the solid matter of described gas hydrates is carried out collecting and being broken for particle, seawater and described particle are mixed to form gas-liquid-solid multiphase mixture stream by injection;
Airtight fluidisation gathering line: comprise closed conduit, described closed conduit and described seabed are tunneled fluidisation and are promoted to prize and be connected that described gas-liquid-solid multiphase mixture stream is promoted to sea;
Sea separating and treating apparatus: be arranged at described sea back-up system, comprises the separator that is separated the described gas-liquid-solid multiphase mixture being promoted to sea by closed conduit and the treating apparatus processed gained separator after being separated;
In airtight fluidisation gathering line system, also be provided with decomposition control device, described decomposition control device controls the pressure change in lifting process of described gas-liquid-solid multiphase mixture in described closed conduit and variations in temperature to make the described gas hydrate dissociation of part in described gas-liquid-solid multiphase mixture for water and natural gas, and to make natural gas decomposition amount increase, realization is intrasystem from gaslift at described closed conduit.
2. the green mining system of gas hydrates as claimed in claim 1, is characterized in that, described seabed driving fluidisation promotes sled and comprises:
Mole, comprising:
Fuselage;
Running mechanism, is arranged at described fuselage bottom;
Once broken rock machinery, is arranged at the front of described fuselage; And
Collecting, is arranged in described fuselage, described in collecting, once break the described gas hydrates after rock Mechanical Crushing;
Mixed pipe line, is connected to described collecting, so that the described gas hydrates of described mole digging and sea water mixing are formed described gas-liquid-solid multiphase mixture stream; And
Supercharging device, for increasing transmission pressure for described mixed pipe line.
3. the green mining system of gas hydrates as claimed in claim 2, it is characterized in that, in described seabed driving fluidisation lifting sled, described collecting is also provided with and breaks rock machinery for the described described gas hydrates once breaking the first time fragmentation of rock machinery are carried out second time fragmentation with the secondary forming described particle.
4. the green mining system of gas hydrates as claimed in claim 2, it is characterized in that, described running mechanism is crawler type running mechanism, and described once broken rock machinery comprises the broken rock cylinder that the spiral be arranged on the upside of described fuselage front breaks rock machinery and is arranged on described fuselage front lower.
5. the green mining system of gas hydrates as claimed in claim 4, it is characterized in that, the top of described broken rock cylinder is provided with overflow gas collection cap.
6. the green mining system of gas hydrates as claimed in claim 1, is characterized in that, in seabed, driving fluidisation promotes the monitoring device also comprising the temperature and pressure for storage area described in Real-Time Monitoring in sled.
7. the green mining system of gas hydrates as claimed in claim 2, is characterized in that, in marine site, ultra-deep sea, described airtight fluidisation gathering line is also included in supercharging equipment in the water of described closed conduit medium position setting.
8. the green mining system of gas hydrates as claimed in claim 7, is characterized in that, in described water, supercharging equipment is supercharging sled, and described supercharging sled is connected to carry out supercharging to the transmission medium in described closed conduit with described closed conduit.
9. the green mining system of gas hydrates as claimed in claim 8, is characterized in that, described sea back-up system is that ship or sea supporting platform are supported in sea.
10. the green mining system of gas hydrates as claimed in claim 9, it is characterized in that, in described water, by described sea, the electric power of supercharging equipment and the electric power of described seabed driving fluidisation lifting sled support that the dynamical system that ship or sea supporting platform are arranged supplies.
The green mining system of 11. gas hydrates as claimed in claim 7, it is characterized in that, described separator comprises the cyclone separator that settlement separator with pressure is connected with the separator output of described settlement separator with pressure, and described treating apparatus comprises the natural gas treatment plant that described cyclone separator separator output connects.
The green mining system of 12. gas hydrates as claimed in claim 8, it is characterized in that, described sea separating and treating apparatus also comprises well head integrity control device, described well head integrity control device comprise connect described closed conduit end and described sea support the linkage of ship and the emergent cutoff device that arranges before and after described linkage to carry out well head integrity control to the outlet of described closed conduit.
The green mining system of 13. gas hydrates as claimed in claim 11, it is characterized in that, described separator also comprises the backfill pipeline being backfilled to the region of exploiting described gas hydrates for silt and ore in sand form, and described backfill pipeline is connected to the separator output of settlement separator with pressure and cyclone separator.
The green mining system of 14. gas hydrates as claimed in claim 9, it is characterized in that, described green mining system is also included in the shearing device arranged between described sea back-up system and described airtight fluidisation gathering line, with the power source cutting off described supercharging equipment under emergency conditions to utilize silt gravitational settling in described closed conduit in described gas-liquid-solid multiphase mixture and natural kill-job.
The green mining system of 15. gas hydrates as claimed in claim 9, it is characterized in that, described green mining system is also included in sea and supports the seawater lift that ship or sea supporting platform are arranged and control unit, with by the seawater lift of certain depth under sea to sea, then be delivered to described mixed pipe line to mix with described particle, and the described gas-liquid-solid multiphase mixture stream in mixed pipe line described in drainage.
The green mining system of 16. gas hydrates as claimed in claim 11, is characterized in that, also comprises the conveying device of the separating obtained and natural gas of post liquefaction being carried out storage device and the outwards conveying stored in the separating and treating apparatus of sea.
The green mining system of 17. gas hydrates as claimed in claim 13, it is characterized in that, described separator also comprises seawater treatment apparatus, and described seawater treatment apparatus is connected to the separator output of settlement separator with pressure and cyclone separator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595204.XA CN103628880B (en) | 2013-11-21 | 2013-11-21 | The green mining system of deep seafloor shallow-layer non-diagenesis formation gas hydrate |
Applications Claiming Priority (1)
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| CN201310595204.XA CN103628880B (en) | 2013-11-21 | 2013-11-21 | The green mining system of deep seafloor shallow-layer non-diagenesis formation gas hydrate |
Publications (2)
| Publication Number | Publication Date |
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| CN101182771A (en) * | 2007-12-12 | 2008-05-21 | 中国地质大学（武汉） | Seabed gas hydrate mining methods and device |
| SG186178A1 (en) * | 2010-06-18 | 2013-01-30 | Nautilus Minerals Pacific Pty | A system for seafloor mining |
| DE102011106905A1 (en) * | 2011-03-11 | 2012-09-13 | Jochen Prasser | Method for conveying methane from methane hydrate deposits, involves limiting current action area of deposit from surrounding by covering device, and releasing gas from gas hydrate by heating limited area |
| CN103046930B (en) * | 2013-01-15 | 2015-05-13 | 中国科学院力学研究所 | Suction type hydrate mining device and method |
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