CN1757882A - Sea bed gas hydrate exploitation and conveying method and device - Google Patents
Sea bed gas hydrate exploitation and conveying method and device Download PDFInfo
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- CN1757882A CN1757882A CNA2005101008105A CN200510100810A CN1757882A CN 1757882 A CN1757882 A CN 1757882A CN A2005101008105 A CNA2005101008105 A CN A2005101008105A CN 200510100810 A CN200510100810 A CN 200510100810A CN 1757882 A CN1757882 A CN 1757882A
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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
- 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
The invention provides a kind of exploitation of gas hydrates and conveying method and device, comprise multi-phase mixed delivering pipeline 1, fragmentation and piece-rate system 2, freezing and formation system 3, hydrate storage and transportation ship 4 etc., described fragmentation and piece-rate system 2 are connected multiphase mixed transportation technology pipeline 1 and freezing and formation system 3 respectively, and described freezing and formation system 3 exports hydrate storage and transportation ship 4 to.Described fragmentation and piece-rate system 2 also are connected with platform energy supply system 5, and described platform energy supply system 5 is provided with TRT 6, and are connected to freezing and formation system 3 by another hydrate generation system 7 jointly with broken and piece-rate system 2.Method and apparatus of the present invention, overcome the drawback of existing exploiting ocean natural gas hydrate the whole bag of tricks preferably, equipment is simple, easy to operate, with low cost, high efficiency, can be applied to exploiting ocean natural gas hydrate on a large scale, find a new way for the mankind utilize the ocean natural gas resource on a large scale.
Description
[technical field]
The present invention relates to the natural gas extraction technology, exploitation and the conveying method and the device of the gas hydrates that especially a kind of seabed stores.
[technical background]
The natural-gas hydrate is mainly contained in the seabed, is the white solid state crystalline material that natural gas forms with the water mutual effect under the cryogenic high pressure condition.Because the self-characteristic of gas hydrates, its exploitation method is different with the exploitation of conventional energy resource (as coal, oil, natural gas etc.).Such as, coal is solid under mine, because its storage degree of depth is little, so can directly adopt solid-state mining, that is to say, is still solid after the exploitation; The oil storage degree of depth is big, but since oil underground be fluid, therefore can exploit with liquid form, be still fluid after the exploitation.Different with coal, oil, though gas hydrates bury with solid forms at marine bottom, production technique is all different with existing coal and oil.The gas hydrates development technique that comprehensive various countries scientist proposes can be divided into two classes substantially: gaseous state exploitation and solid-state mining.
The gaseous state exploitation is the activities with reference to oil exploitation, at first in the stratum, form pit shaft, consider how to break artificially the temperature and pressure condition of gas hydrates stable existence then, the hydrate that will contain in deposit decomposes, and natural gas is adopted to ground at last again.Mainly comprise: (1) heating is that steam, hot water, hot salt brine or other hot fluid are pumped into the gas hydrates reservoir from ground, impels temperature to rise and reaches the decomposition of hydrate; (2) voltage drop method is by reducing moving of phase equilibrium line that pressure causes that gas hydrates are stable, thereby reaches the purpose of impelling gas hydrates to decompose; (3) chemical agent method, chemical agents such as salt solution, methyl alcohol, ethanol are pumped into the stratum from wellhole after, can change the phase balance condition that hydrate forms, reduce the hydrate equilibrium temperature, cause the decomposition of gas hydrates.For underground decomposition exploitation, be easy to form reasons such as hydrate obstruction in, the pipeline very long owing to the pipeline of the instability of continental slope, laying, can produce certain technology and economic problems.Simultaneously, more than various production techniques itself limitation is all arranged, big as the heating heat waste, efficient is low, the voltage drop method exploitation rate is slow, chemical agent method expense costliness etc.More than these factors, all might make people be difficult to utilize this means to come the exploitation of gas hydrate resource.
Solid-state mining is meant under the situation that gas hydrates are decomposed, and gas hydrates is transported on land or the sea decomposes exploitation.Someone proposes following method: make gas hydrate particleization at the deep-sea; in a kind of expandable soft airbag of afterwards gas hydrates being packed into (its inner gas hydrates that keep are stablized needed temperature and pressure condition); with submarine gas hydrates are dragged near the continental shelf shallow water area again; there; gas hydrates can decompose lentamente, produce fuel and water.Perhaps can develop a kind of additive from now on, gas hydrates can be stablized under lower pressure and higher temperature.Yet the shortcoming of this method is batch production on the one hand, is that yield is very little on the other hand, is not suitable for large scale mining.
In view of above reason, the present invention is on the basis of advantage that takes into full account gaseous state exploitation and solid-state mining and deficiency, a kind of economy, the method and the device of large scale mining ocean gas hydrate have efficiently been proposed, for the exploitation and the accumulating of hydrate opens up a new way.
[summary of the invention]
The purpose of this invention is to provide a kind of economy, the method and the device of large scale mining and accumulating ocean gas hydrate efficiently.
The objective of the invention is to be achieved through the following technical solutions: hydrate is transported to the plane, seabed with solid forms, carrying out preliminary silt there separates, then, adopt multiphase mixed transportation technology, the mixture of hydrate-silt-water-gas is transported to offshore platform as three-phase mixed transporting tube road etc.The mixture of the hydrate-silt-water-gas that comes from three-phase mixed transporting tube road at first enters breaker, the hydrate and the silt of bulk is broken into little particle, to help the separation of silt.Afterwards, mixture enters silt separation apparatus, the silt of separating is entered marine, and gas hydrates then enter freezing and formation system.In the decomposed natural gas part enter motor be used for the generating, use for platform, remaining natural gas then enters the hydrate generation system, synthesis of natural gas hydrate in this generation system, mix mutually with the gas hydrates that directly produce the front, enter freezing and shaped device,, adopt solid forms to be transported to seashore the hydrate storage and transportation ship of packing into after the hydrate extrusion modling.
Exploitation of gas hydrates of the present invention and storage and transportation apparatus, comprise multi-phase mixed delivering pipeline 1, fragmentation and piece-rate system 2, freezing and formation system 3, hydrate storage and transportation ship 4 etc., described fragmentation and piece-rate system 2 are connected multiphase mixed transportation technology pipeline 1 and freezing and formation system 3 respectively, and described freezing and formation system 3 exports hydrate storage and transportation ship 4 to.Described fragmentation and piece-rate system 2 also are connected with platform energy supply system 5, and described platform energy supply system 5 is provided with TRT 6, and are connected to freezing and formation system 3 by hydrate generation system 7 jointly with broken and piece-rate system 2.
Further specify as follows to content of the present invention:
Multiphase mixed transportation technology: crucial amount according to hydrate and silt, the mixed volume of control water is controlled at 25-35% in the percent by volume of multi-phase mixed delivering entrance water, and this ratio convey unit solid masses wasted work is minimum.As far as possible gas is separated in the heterogeneous course of conveying, the multi-phase mixed delivering pipe is made up of trunk line and secondary duct, every a segment distance gas storage ring is set at multi-phase mixed delivering Guan Shangke gas is collected, and by secondary duct gas is carried and is gone up offshore platform.
Fragmentation and piece-rate system: sky gas hydrate and silt mixture after the fragmentation tangentially enter separator, the rotation of agitator accelerating mixture, and in gravity and centrifugal force acting in conjunction, heavy silt enters the sea from separation unit bottoms.Sky gas hydrate and seawater after the separation are discharged from the separator middle and upper part, filter out seawater and just obtain a day gas hydrate.Discharge from the separator top at the natural gas that separation process produces.
Freezing and formation system: freezing to below-10 ℃ sky loose, that disperse gas hydrate, pressurization 2Mpa is compressed into fine and close formation solid, the hydrate storage and transportation ship of packing into then, heat-insulation pressure keeping transportation.
Method and apparatus of the present invention, overcome the drawback of existing exploiting ocean natural gas hydrate the whole bag of tricks preferably, equipment is simple, easy to operate, with low cost, high efficiency, can be applied to exploiting ocean natural gas hydrate on a large scale, find a new way for the mankind utilize the ocean natural gas resource on a large scale.
[description of drawings]
Fig. 1 is the general flow chart of apparatus of the present invention figure and method
Fig. 2 is an embodiment of the invention multi-phase mixed delivering pipeline configuration schematic diagram
Fig. 3 is the broken and piece-rate system structural representation of the embodiment of the invention
Fig. 4 is broken and a piece-rate system pipeline 29 and separator 28 position views of the embodiment of the invention
Description of reference numerals
Multi-phase mixed delivering pipeline 1, fragmentation and piece-rate system 2, freezing and formation system 3, hydrate storage and transportation ship 4, platform energy supply system 5, TRT 6, hydrate generation system 7, trunk line 8, secondary duct 9, gas storage ring 10, floating valve 11, by-pass prot 12, water yield adjustment doors 13, separator 14, pipeline 15, pipeline 16, remove sand tube 17, gas pipeline 18, agitator 19, breaker 20
[specific embodiment]
As shown in Figure 1, the inventive system comprises multi-phase mixed delivering pipeline 1, fragmentation and piece-rate system 2, freezing and formation system 3, hydrate storage and transportation ship 4 etc., described fragmentation is connected multiphase mixed transportation technology pipeline 1 and freezing and formation system 3 respectively with piece-rate system 2, described multiphase mixed transportation technology pipeline 1 mixes the transferring technology pipeline for three-phase, mixture with the hydrate-silt-water-gas that will separate through preliminary silt from the seabed is transported to offshore platform, and carries out fragmentation and separate.The silt of separating is entered marine, gas hydrates then enter freezing and formation system.Described freezing and formation system 3 exports isolated gas hydrates extrusion modling to hydrate storage and transportation ship 4.In addition, described fragmentation and piece-rate system 2 also are connected with platform energy supply system 5, described platform energy supply system 5 is provided with TRT 6, using in broken and the piece-rate system 2 in the decomposed natural gas part to enter TRT 6 is used for generating electricity, and be connected to freezing and formation system 3 by another hydrate generation system 7 jointly with broken and piece-rate system, so that remaining natural gas is then entered hydrate generation system 7, synthesis of natural gas hydrate in this generation system, mix mutually with the hydrate that directly produce the front, enter freezing and shaped device 3, the hydrate storage and transportation ship 4 of packing into then, the heat-insulation pressure keeping transportation.
Described freezing and formation system 3 is freezing to below-10 ℃ sky loose, that disperse gas hydrates, and pressurization 2Mpa is compressed into fine and close formation solid.
As shown in Figure 2, multi-phase mixed delivering pipeline 1 needs seawater amount and the tolerance in the control pipeline.Multi-phase mixed delivering pipeline 1 is made of trunk line 8, secondary duct 9, gas storage ring 10.At trunk line 8 entrance sides water yield adjustment doors 13 is set,, makes the percent by volume of entrance water be controlled at 25-35% by regulating its aperture size.On trunk line 8, a gas storage ring 10 is set every 50 meters, the gas of trunk line 8 enters gas storage ring 10 by by-pass prot 12, be connected by secondary duct 9 between two gas storage rings 10, secondary duct 9 lower port upside in gas storage ring 10, floating valve 11 is installed under secondary duct 9 lower port, when entering gas storage ring 10 hypervolias, floating valve 11 rises and blocks secondary duct 9 lower port, prevent that seawater from entering secondary duct 9, when gas storage ring 10 tolerance increase, the water surface descends, and floating valve 11 descends, and secondary duct 9 is open-minded again; Secondary duct 9 upper port enter upside in the gas storage ring 10.The mixture of hydrate-silt-water-gas decomposes the gas that comes out in the process that trunk line 8 is carried just can discharge trunk line 8, improves transfer efficiency.
As shown in Figure 3, broken and piece-rate system comprises breaker 20 and separator 14.The mixture of hydrate-silt-water-gas that three-phase mixed transporting tube road comes at first enters breaker 20, comes out to enter separator 14 through piping 15 from breaker 20, and pipeline 15 is tangential direction (as shown in Figure 4) with separator 14 walls.Separator 14 centers are provided with agitator 19, and through the rotation of agitator 19 accelerating mixtures, in gravity and centrifugal force acting in conjunction, heavy silt removes sand tube 17 from separator 14 and enters the sea.Sky gas hydrate after the separation and seawater are discharged from the pipeline 16 of separator 14 middle and upper parts, filter out seawater and just obtain a day gas hydrate.Discharge from separator 14 gas pipelines 18 tops at the natural gas that separation process produces.
Claims (10)
1, a kind of sea bed gas hydrate exploitation and conveying method is characterized in that may further comprise the steps:
(1) hydrate is transported to the plane, seabed with solid forms, carries out preliminary silt and separate;
(2) adopt multiphase mixed transportation technology that the mixture of hydrate-silt-water-gas is transported to offshore platform;
(3) it is marine through the silt of separating being entered after the fragmentation to be transported to the mixture of water-hydrate-silt-natural gas of offshore platform, and gas hydrates then enter freezing and the formation system extrusion modling;
(4) the accumulating ship of packing into of the hydrate after the extrusion modling adopts solid forms to be transported to seashore.
2, sea bed gas hydrate exploitation as claimed in claim 1 and conveying method, it is characterized in that further comprising the steps of: a part in the decomposed natural gas in the step (3) is entered motor be used for generating, use for offshore platform, remaining natural gas then enters the hydrate generation system, synthesis of natural gas hydrate in this generation system, mix mutually with the hydrate of directly separating, enter freezing and the formation system extrusion modling.
3, sea bed gas hydrate exploitation as claimed in claim 1 and conveying method, it is characterized in that: the multiphase mixed transportation technology in the described step (2) adopts three-phase mixed transporting tube road.
4, as claim 1 or 3 described sea bed gas hydrate exploitation and conveying methods, it is characterized in that: the percent by volume at multi-phase mixed delivering entrance water is controlled at 25-35%.
5, as claim 1 or 3 described sea bed gas hydrate exploitation and conveying methods, it is characterized in that: described multi-phase mixed delivering pipeline is made up of trunk line and secondary duct, on described multi-phase mixed delivering pipeline, be interrupted being provided with the gas storage ring, by secondary duct gas carried and gone up offshore platform.
6, sea bed gas hydrate exploitation as claimed in claim 1 or 2 and conveying method is characterized in that: freezing to below-10 ℃ sky loose, that disperse gas hydrate in freezing and formation system, pressurization 2Mpa is compressed into fine and close formation solid.
7, a kind of sea bed gas hydrate exploitation and storage and transportation apparatus, it is characterized in that comprising multi-phase mixed delivering pipeline (1), fragmentation and piece-rate system (2), freezing and formation system (3), hydrate storage and transportation ship (4), described fragmentation and piece-rate system (2) are connected multiphase mixed transportation technology pipeline (1) and freezing and formation system (3) respectively, and described freezing and formation system (3) exports hydrate storage and transportation ship (4) to; Described fragmentation and piece-rate system (2) also are connected with platform energy supply system (5), described platform energy supply system (5) is provided with TRT (6), and is connected to freezing by hydrate generation system (7) jointly and formation system (3) with broken and piece-rate system (2).
8, sea bed gas hydrate exploitation as claimed in claim 7 and storage and transportation apparatus, it is characterized in that: described multi-phase mixed delivering pipeline (1) is three-phase mixed transporting tube road.
9, as claim 7 or 8 described sea bed gas hydrate exploitation and storage and transportation apparatus, it is characterized in that: described multi-phase mixed delivering pipeline (1) is made up of trunk line (8) and secondary duct (9), go up interruption at described multi-phase mixed delivering pipeline (1) and be provided with gas storage ring (10), be connected by secondary duct (9) between two gas storage rings (10).
10, sea bed gas hydrate exploitation as claimed in claim 7 and storage and transportation apparatus, it is characterized in that: described fragmentation and piece-rate system (2) comprise breaker (20) and separator (14), at first enter breaker (20) from the mixture of the next hydrate-silt-water-gas of multi-phase mixed delivering pipeline (1), come out to enter separator (14) through piping (15) from breaker (20).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101008105A CN100449117C (en) | 2005-10-31 | 2005-10-31 | Extracting and conveying method and device of sea-bottom natural gas hydrate |
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| CNB2005101008105A CN100449117C (en) | 2005-10-31 | 2005-10-31 | Extracting and conveying method and device of sea-bottom natural gas hydrate |
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| CN1757882A true CN1757882A (en) | 2006-04-12 |
| CN100449117C CN100449117C (en) | 2009-01-07 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100587227C (en) * | 2007-02-13 | 2010-02-03 | 中国科学院广州能源研究所 | Method for exploiting natural gas hydrates and device thereof |
| CN102084086A (en) * | 2008-07-02 | 2011-06-01 | 海洋能源勘探国际有限责任公司 | A method of mining and processing seabed sediment |
| CN101666286B (en) * | 2009-09-28 | 2011-12-07 | 中国海洋石油总公司 | System for integrally exploiting marine energy resource |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN103321641A (en) * | 2013-07-01 | 2013-09-25 | 北京四达特商业有限责任公司 | Solid-state combustible ice exploitation method |
| CN103498648A (en) * | 2013-10-17 | 2014-01-08 | 中国科学院广州能源研究所 | Method and device for exploiting aquo-complex through combination of pressure reducing technology and hydraulic fracturing technology |
| CN103628844A (en) * | 2013-11-21 | 2014-03-12 | 中国海洋石油总公司 | Method for green mining of natural gas hydrate of shallow non-diagenesis stratum of deep seabed |
| CN106837339A (en) * | 2017-04-09 | 2017-06-13 | 杭州云蜂工业设计有限公司 | A kind of broken equipment of submarine surface combustible ice |
| CN106968674A (en) * | 2017-04-09 | 2017-07-21 | 杭州云蜂工业设计有限公司 | A kind of disintegrating apparatus of submarine surface gas hydrates |
| CN106968645A (en) * | 2017-04-09 | 2017-07-21 | 杭州云蜂工业设计有限公司 | A kind of sea bed gas hydrate disintegrating apparatus |
| CN109971519A (en) * | 2019-03-28 | 2019-07-05 | 中国科学院广州能源研究所 | The continuous preparation device of gas hydrates bead |
| CN110073078A (en) * | 2016-12-15 | 2019-07-30 | 日挥株式会社 | Methane gas production equipment and methane gas production method |
| CN111577213A (en) * | 2020-05-28 | 2020-08-25 | 广东工业大学 | System and method for solid-state storage and transportation of gas produced by ocean combustible ice |
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| NO922478L (en) * | 1991-07-10 | 1993-01-11 | Conoco Inc | OIL BURNER PRODUCTION SYSTEM |
| DE19906147A1 (en) * | 1999-02-13 | 2000-08-17 | Heinz Hoelter | Process for the production of frozen gas on the sea floor |
| JP2003193788A (en) * | 2001-12-27 | 2003-07-09 | Mitsubishi Heavy Ind Ltd | Method and system for collecting gas hydrate by boring |
| CN1587642A (en) * | 2004-09-21 | 2005-03-02 | 中国科学院广州能源研究所 | Method and device for sea natural gas hydrate production |
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2005
- 2005-10-31 CN CNB2005101008105A patent/CN100449117C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100587227C (en) * | 2007-02-13 | 2010-02-03 | 中国科学院广州能源研究所 | Method for exploiting natural gas hydrates and device thereof |
| CN102084086A (en) * | 2008-07-02 | 2011-06-01 | 海洋能源勘探国际有限责任公司 | A method of mining and processing seabed sediment |
| CN101666286B (en) * | 2009-09-28 | 2011-12-07 | 中国海洋石油总公司 | System for integrally exploiting marine energy resource |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN103321641A (en) * | 2013-07-01 | 2013-09-25 | 北京四达特商业有限责任公司 | Solid-state combustible ice exploitation method |
| CN103321641B (en) * | 2013-07-01 | 2015-02-11 | 北京四达特商业有限责任公司 | Solid-state combustible ice exploitation method |
| CN103498648A (en) * | 2013-10-17 | 2014-01-08 | 中国科学院广州能源研究所 | Method and device for exploiting aquo-complex through combination of pressure reducing technology and hydraulic fracturing technology |
| CN103628844A (en) * | 2013-11-21 | 2014-03-12 | 中国海洋石油总公司 | Method for green mining of natural gas hydrate of shallow non-diagenesis stratum of deep seabed |
| CN103628844B (en) * | 2013-11-21 | 2017-07-18 | 中国海洋石油总公司 | The recovery method of the non-diagenesis formation gas hydrate of deep seafloor shallow-layer |
| CN110073078A (en) * | 2016-12-15 | 2019-07-30 | 日挥株式会社 | Methane gas production equipment and methane gas production method |
| CN110073078B (en) * | 2016-12-15 | 2021-12-07 | 日挥环球株式会社 | Methane gas production equipment and methane gas production method |
| CN106837339A (en) * | 2017-04-09 | 2017-06-13 | 杭州云蜂工业设计有限公司 | A kind of broken equipment of submarine surface combustible ice |
| CN106837339B (en) * | 2017-04-09 | 2018-03-16 | 杭州云蜂工业设计有限公司 | A kind of broken equipment of submarine surface combustible ice |
| CN108160298A (en) * | 2017-04-09 | 2018-06-15 | 杭州云蜂工业设计有限公司 | A kind of crushing plant of submarine surface gas hydrates |
| CN106968645A (en) * | 2017-04-09 | 2017-07-21 | 杭州云蜂工业设计有限公司 | A kind of sea bed gas hydrate disintegrating apparatus |
| CN106968674A (en) * | 2017-04-09 | 2017-07-21 | 杭州云蜂工业设计有限公司 | A kind of disintegrating apparatus of submarine surface gas hydrates |
| CN109971519A (en) * | 2019-03-28 | 2019-07-05 | 中国科学院广州能源研究所 | The continuous preparation device of gas hydrates bead |
| CN111577213A (en) * | 2020-05-28 | 2020-08-25 | 广东工业大学 | System and method for solid-state storage and transportation of gas produced by ocean combustible ice |
| CN111577213B (en) * | 2020-05-28 | 2021-12-24 | 广东工业大学 | System and method for solid-state storage and transportation of gas produced by ocean combustible ice |
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