CN108005618A - A kind of gas hydrate exploitation device and method based on solar energy-sea water source heat pump combined heat technology - Google Patents
A kind of gas hydrate exploitation device and method based on solar energy-sea water source heat pump combined heat technology Download PDFInfo
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- CN108005618A CN108005618A CN201711288676.5A CN201711288676A CN108005618A CN 108005618 A CN108005618 A CN 108005618A CN 201711288676 A CN201711288676 A CN 201711288676A CN 108005618 A CN108005618 A CN 108005618A
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- 239000013535 sea water Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 59
- 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 24
- 238000005516 engineering process Methods 0.000 title claims description 22
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 150000004677 hydrates Chemical class 0.000 claims abstract description 25
- 238000010248 power generation Methods 0.000 claims abstract description 20
- 238000005065 mining Methods 0.000 claims abstract description 16
- 238000007667 floating Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 59
- 239000012530 fluid Substances 0.000 claims description 47
- 238000000605 extraction Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000012267 brine Substances 0.000 claims description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 3
- 238000011549 displacement method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—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
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of gas hydrate exploitation device and method based on the heat pump united heat supply process in solar energy sea water source.This method relates generally to maritime floating platform, solar thermal unit, sea water source heat pump unit, solar power generation unit, sea bed gas hydrate production unit, monitoring and controlling unit.The method can carry out heat supply using the solar energy and seawater enriched in marine site, basic heat source as the exploitation of sea bed gas hydrate heat injection method, utilize solar power generation at the same time, energized to current consuming apparatus such as system inner compressor, superheater, pumps, be a kind of method that solar energy can combine energy supply exploitation of gas hydrate with seawater.This method can utilize reproducible solar energy and extra large hydraulic power potentials, high-efficiency mining sea bed gas hydrate resource, greatly reduces the input cost of exploitation heat source, and technique is simple, with multiple benefits such as economy, environment, societies, the large-scale commercial of gas hydrates is contributed to exploit.
Description
Technical field
It is more particularly to a kind of to be based on solar energy-sea water source heat pump the invention belongs to exploitation of gas hydrates technical field
The gas hydrate exploitation device and method of combined heat technology.
Background technology
Gas hydrates are the huge clean energy resourcies of a kind of potential reserves, its reserves is approximately the current explored whole world
2 times of carbon content summation in all fossil fuels, at least 1.0 × 1013Ton.How efficiently, economically from hydrate reservoir
The huge natural gas resource of mine reserves still faces lot of challenges.
Since being stabilized for gas hydrates needs specific temperature and pressure condition, it is typically distributed about in frozen soil
Or in bottom sediment of the depth of water more than 300 meters.If temperature raises or pressure reduces, gas hydrates will become unstable
Fixed, decomposition discharges methane gas.Therefore, the thermodynamic condition being stabilized by breaking sea bed gas hydrate, you can real
Its existing high-efficiency mining.
At present, the successful methods by mining site actual verification mainly have voltage drop method, note chemical-agent technique, heat injection method, CO2Put
Change method etc..Voltage drop method is to make it below hydrate generation pressure by reducing reservoir pressure；It is by someization to note chemical-agent technique
Learn reagent（Such as methanol, ethanol, ethylene glycol）Stratum is injected, changes the phase balance condition of gas hydrate synthesis；Heat injection method is mainly
Steam, hot water, hot salt brine or other hot fluids are injected into gas hydrates reservoir, make its temperature higher than hydrate generation temperature
Degree；CO2Displacement method is by CO2（Or containing CO2The gaseous mixture of displacement method）Hydrate reservoir is injected into, is displaced in hydrate
CH4, while by CO2Bury in seabed.In actual application, the above method has certain limitation, such as voltage drop method is low
Effect problem, the high cost and pollution problem for noting chemical-agent technique, the heat loss problem of heat injection method and CO2The mechanism of displacement method is not
It is bright.It is applied widely since heat injection method can be effectively facilitated decomposition of hydrate, if the heat loss in recovery process can be resolved
Problem, provides a large amount of relatively cheap heat sources for the exploitation of hydrate resource, contributes to what gas hydrates scale was exploited
Realize.
Need to consume substantial amounts of energy for the exploitation of gas hydrates heat injection method, the present invention proposes that one kind is based on the sun
The gas hydrate mining methods of energy-sea water source heat pump combined heat technology, can be provided using reproducible solar energy and seawater
Source, obtains the heats largely available for hydrate exploitation, whole process economy, environmental protection, energy saving.
The content of the invention
In order to solve to need to consume the substantial amounts of energy during heat injection method exploitation sea bed gas hydrate, reduce exploitation into
This, the present invention proposes a kind of gas hydrate mining methods based on solar energy-sea water source heat pump combined heat technology.The party
Method makes full use of the reproducible solar energy enriched in marine site and extra large hydraulic power potentials, produces a large amount of cheap opened available for hydrate
The heat adopted, it is whole process economy, environmental protection, energy saving.
In order to achieve the above object, the present invention provides a kind of based on solar energy-sea water source heat pump combined heat technology
Gas hydrate exploitation device and method, are achieved through the following technical solutions.
A kind of gas hydrate mining methods based on solar energy-sea water source heat pump combined heat technology, the seabed day
Right gas hydrate recovery method mainly passes through maritime floating platform, solar thermal collector, sea water source heat pump, solar power generation list
Member, sea bed gas hydrate production unit, monitor controller realize that step is as follows：
(1) more than two mouthfuls of horizontal well is drilled out in gas hydrates reservoir using deep sea drilling technology；The horizontal well bag
Include more than one recovery well and more than one extraction well；Perforation is set at recovery well horizontal segment position, for being stored up to hydrate
Layer heated fluid injection；Gas and liquid collecting casing is set at extraction well horizontal segment position, for collecting the methane gas decomposed and produced；
(2) maritime floating platform is built（22）, arrange solar thermal collector（1）, sea water source heat pump（10）, solar power generation dress
Put（6）, monitor controller（20）And ancillary equipment, it is laid with the pipe to sea bottom hydrate reservoir recovery well input hot-fluid injection
Road, superheater is set in recovery well vertical section bottom（14）, for heating hot-fluid injection, and in solar power generation unit and well
Cable is set up between the superheater of bottom；The solar power generation unit includes storage battery（5）, device of solar generating（6）And control
Conversion equipment processed（7）；
(3) solar power generation unit is opened, photovoltaic battery plate, which is collected, radiation energy and can be converted into electric energy very much, and the electric energy of generation is used for
Maintenance system inner compressor, superheater, the normal work of pump；
(4) initial stage of production promotes gas hydrates to be decomposed by decompression mode, reaches and changes hydrate reservoir structure
Purpose, a large amount of pore channels of inductive formation, improve reservoir permeability, contribute to diffusion of the hot-fluid injection in reservoir；When natural
When gas hydrate reservoir pressure is down to less than 15% of hydrate phase balance pressure corresponding to reservoir temperature, the hot method exploitation of metaideophone, i.e.,
Hot-fluid injection is inputted by recovery well, hydrate reservoir is injected by horizontal segment perforation, promotes decomposition of hydrate；
(5) in the hot method mining phase of hydrate metaideophone, by solar energy-sea water source heat pump combined heat, solar thermal collector is utilized
The energy collected with sea water source heat pump is energized, and hot-fluid injection is pumped into after heating 60 ~ 100 °C from recovery well well head, through overheat
After device heating, hydrate reservoir is injected by the perforation position of recovery well horizontal segment；
(6) monitoring and controlling unit ensures the whole safe efficient operation of recovery process, passes through temperature and pressure sensor collection system
System operation information, judges its operating status, and the operation of timely control valve, pump, realizes the switching of system operation mode, meets not
Mining requirement with the conditions of.
In the above method, the hot-fluid injection is strong brine, methanol, ethylene glycol, seawater and its mixed solution.
In the above method, the superheater is electric heater, microwave applicator, ultrasonic generator and combinations thereof.
In the above method, depending on the switching foundation ocean temperature and solar radiation power of the system operation mode, specifically
Following five kinds can be divided into：
(1) the independent heat-supplying mode of solar thermal unit：Heat injection method initial stage of production, hydrate concentration is higher, required thermic load
Smaller, the temperature that solar thermal unit provides is higher, fluid temperature (F.T.)T>=60 °C, meet mining requirement, without starting seawater
Source heat pump unit；
(2) solar energy heat-supplying mode in parallel with sea water source heat pump：Temperature after solar thermal unit heating fluid is 40 °C
≤T≤ 60 °C, it is impossible to be directly injected into stratum, the fluid of hot water storage tank outlet at this time and the condenser of sea water source heat pump unit are simultaneously
Connection, carries out heat supply in parallel；
(3) solar energy is connected heat-supplying mode with sea water source heat pump：Temperature after solar thermal unit heating fluid is 20 °C
≤T≤ 40 °C, into sea water source heat pump unit evaporator, carry out series connection heat supply；
(4) the independent heat-supplying mode of sea water source heat pump：After solar thermal unit heating fluid,T≤ 10 °C, stop solar energy system
System work, utilizes the independent heat supply of sea water source heat pump；
(5) the independent heat-supplying mode of solar power generation unit：In the winter time, under the meteorological condition such as night or rainy days, solar energy collection
The heat that hot cell and sea water source heat pump unit provide can not meet the needs of gas hydrates heat injection method exploitation, and system can be by
Solar power generation unit heat supply, the spare electricity by discharging storage ensure that systems stay is run.
A kind of gas hydrate exploitation device based on solar energy-sea water source heat pump combined heat technology, including the sun
Can heat collector, hot water storage tank, valve, pump, plate heat exchanger, sea water source heat pump, recovery well well head, superstratum, recovery well, under
Cover stratum, hydrate reservoir, extraction well, extraction well well head, gas-liquid separator, maritime floating platform, hot-fluid injection input pipe, gas
Liquid collects casing and perforation；The hydrate reservoir is internally provided with recovery well and extraction well, and the extraction well, which is provided outside, to be adopted
Go out well well head, the extraction well well head is connected with gas-liquid separator, and the extraction well horizontal segment is provided with gas and liquid collecting casing, institute
State recovery well and be provided outside recovery well well head, the recovery well horizontal segment is provided with perforation；The pump, valve, hot water storage tank, too
Positive energy heat collector is sequentially connected with, and the outlet of the solar thermal collector is connected with hot water storage tank, and the hot water storage tank passes through note
Hot fluid input pipe is connected with recovery well well head；The sea water source heat pump, plate heat exchanger and maritime floating platform are sequentially connected with,
And maritime floating platform is sequentially connected with by pumping with plate heat exchanger, sea water source heat pump, the sea water source heat pump passes through heat injection stream
Body input pipe is connected with recovery well well head；Pipeline, the source of seawater heat are provided between the hot water storage tank and plate heat exchanger
Pump is connected with pump, and the sea water source heat pump is connected with hot water storage tank；The hydrate reservoir is located at below superstratum, under being located at
Cover above stratum.
Present invention additionally comprises storage battery, device of solar generating, control conversion equipment and superheater；The superheater
Be arranged in recovery well, the superheater by cable with control conversion equipment be connected, it is described control conversion equipment respectively with
Storage battery, device of solar generating connection.
In above device, temperature and pressure sensor is both provided with the recovery well, extraction well and hot water storage tank, it is described
Temperature and pressure sensor is connected with monitor controller.
In above device, the sea water source heat pump is by evaporator, compressor, condenser, throttling arrangement and internal circulation pump group
Into；The evaporator, compressor, condenser, throttling arrangement and internal circulation pump head and the tail connect.
Compared with prior art, advantage of the invention is that：
(1) by the way that trans-utilization can be carried out to solar energy and seawater low-quality in marine site, high-grade natural gas is produced,
Significantly improve efficiency of energy utilization；
(2) solar energy can be continuously the exploitation of sea bed gas hydrate with seawater as a kind of abundant regenerative resource
Heat and electric energy are provided, greatly reduce production cost；
(3) according to meteorological condition and system operation requirement, the timely switching system method of operation, effectively avoids winter, night or the moon
The problem of rainy day production efficiency is low.
Brief description of the drawings
Fig. 1 is a kind of exploitation of gas hydrates side based on solar energy-sea water source heat pump combined heat technology of the present invention
The process flow chart of method.
Fig. 2 is the process flow chart of sea water source heat pump.
All parts are as follows in figure：
Solar thermal collector 1, hot water storage tank 2, valve 3, pump 4, storage battery 5, device of solar generating 6, control conversion equipment 7,
Temperature and pressure sensor 8, plate heat exchanger 9, sea water source heat pump 10, recovery well well head 11, superstratum 12, recovery well 13,
Superheater 14, under cover stratum 15, hydrate reservoir 16, extraction well 17, extraction well well head 18, gas-liquid separator 19, monitoring control
Device 20 processed, cable 21, maritime floating platform 22, hot-fluid injection input pipe 23, gas and liquid collecting casing 24, perforation 25, evaporator 26,
Compressor 27, condenser 28, throttling arrangement 29, internal circulation pump 30.
Embodiment
The present invention is made with reference to specific embodiment to be further specifically described in detail, but embodiments of the present invention
Not limited to this, for especially not dated technological parameter, can refer to routine techniques progress.
A kind of gas hydrate exploitation device based on solar energy-sea water source heat pump combined heat technology, including the sun
Can heat collector 1, hot water storage tank 2, valve 3, pump 4, plate heat exchanger 9, sea water source heat pump 10, recovery well well head 11, superstratum
12nd, recovery well 13, under cover stratum 15, hydrate reservoir 16, extraction well 17, extraction well well head 18, gas-liquid separator 19, marine floating
Moving platform 22, hot-fluid injection input pipe 23, gas and liquid collecting casing 24 and perforation 25；The hydrate reservoir 16 is internally provided with out
Well 13 and extraction well 17 are adopted, the extraction well 17 is provided outside extraction well well head 18, the extraction well well head 18 and gas-liquid separation
Device 19 connects, and extraction 17 horizontal segment of well is provided with gas and liquid collecting casing 24, and the recovery well 13 is provided outside recovery well well
Mouth 11,13 horizontal segment of recovery well is provided with perforation 25；The pump 4, valve 3, hot water storage tank 2, solar thermal collector 1 are sequentially
Connection, and the outlet of the solar thermal collector 1 is connected with hot water storage tank 2, the hot water storage tank 2 passes through hot-fluid injection input pipe
23 are connected with recovery well well head 11；The sea water source heat pump 10, plate heat exchanger 9 and maritime floating platform 22 are sequentially connected with, and
Maritime floating platform 22 is sequentially connected with by pumping with plate heat exchanger 9, sea water source heat pump 10, and the sea water source heat pump 10 passes through note
Hot fluid input pipe 23 is connected with recovery well well head 11；Pipeline is provided between the hot water storage tank 2 and plate heat exchanger 9, institute
State sea water source heat pump 10 to be connected with pump 4, the sea water source heat pump 10 is connected with hot water storage tank 2；The hydrate reservoir 16 is located at
The lower section of superstratum 12, covers the top of stratum 15 under being located at.Further include storage battery 5, device of solar generating 6, control conversion equipment 7
With superheater 14；The superheater 14 is arranged in recovery well 13, and the superheater 14 is turned by cable 21 and control
Changing device 7 connects, and the control conversion equipment 7 is connected with storage battery 5, device of solar generating 6 respectively.The recovery well 13,
Temperature and pressure sensor 8 is both provided with extraction well 17 and hot water storage tank 2, the temperature and pressure sensor 8 is controlled with monitoring
Device 20 processed connects.The sea water source heat pump 10 is by evaporator 26, compressor 27, condenser 28, throttling arrangement 29 and internal circulation pump
30 compositions；The evaporator 26, compressor 27, condenser 28, throttling arrangement 29 and internal circulation pump 30 connect from beginning to end.
The method of the present invention is as follows：
(1) more than two mouthfuls of horizontal well is drilled out in gas hydrates reservoir 16 using deep sea drilling technology；The horizontal well
Including more than one recovery well 13 and more than one extraction well 17；Recovery well horizontal segment position set perforation 25, for
Hydrate reservoir heated fluid injection；Gas and liquid collecting casing 24 is set at extraction well horizontal segment position, decomposes what is produced for collecting
Methane gas；
(2) maritime floating platform 22, arrangement solar thermal unit 1, sea water source heat pump unit 10, solar power generation list are built
Member 6, monitoring and controlling unit 20 and ancillary equipment, are laid with the pipeline to sea bottom hydrate reservoir recovery well input hot-fluid injection
23, superheater 14 is set in recovery well vertical section bottom, for heating hot-fluid injection, and in solar power generation unit and shaft bottom
Cable 21 is set up between superheater；
(3) solar power generation unit 6 is opened, photovoltaic battery plate, which is collected, radiation energy and can be converted into electric energy very much, and the electric energy of generation is used for
Maintenance system inner compressor 25, superheater 14, the normal work for pumping the current consuming apparatus such as 4；
(4) initial stage of production promotes gas hydrates to be decomposed by decompression mode, reaches and changes hydrate reservoir structure
Purpose, a large amount of pore channels of inductive formation, improve reservoir permeability, contribute to diffusion of the hot-fluid injection in reservoir.When natural
When gas hydrate reservoir pressure is down to less than 15% of hydrate phase balance pressure corresponding to reservoir temperature, the hot method exploitation of metaideophone, i.e.,
Hot-fluid injection is inputted by recovery well, hydrate reservoir is injected by horizontal segment perforation, promotes decomposition of hydrate；
(5) in the hot method mining phase of hydrate metaideophone, by solar energy-sea water source heat pump combined heat, solar thermal collector is utilized
The energy collected with sea water source heat pump is energized, from recovery well well head after 60 °C of hot-fluid injection heating（11）It is pumped into, and passes through
After thermal heating, hydrate reservoir is injected by the perforation position of recovery well horizontal segment；
(6) monitoring and controlling unit ensures the whole safe efficient operation of recovery process, passes through temperature and pressure sensor collection system
System operation information, judges its operating status, and the operation of timely control valve 3, pump 4, realizes the switching of system operation mode, meets
Mining requirement under different condition.
The hot-fluid injection can be strong brine, methanol, ethylene glycol, seawater and its mixed solution.
The superheater can be electric heater, microwave applicator, ultrasonic generator and combinations thereof.
Depending on the switching of the system operation mode is according to ocean temperature and solar radiation power, following five are particularly may be divided into
Kind：
(1) the independent heat-supplying mode of solar thermal unit：Heat injection method initial stage of production, hydrate concentration is higher, required thermic load
Smaller, the temperature that solar thermal unit provides is higher, fluid temperature (F.T.)T>=60 °C, meet mining requirement, without starting seawater
Source heat pump unit, opening valve a, b, c, d, other valves are closed；
(2) solar energy heat-supplying mode in parallel with sea water source heat pump：Temperature after solar thermal unit heating fluid is 40 °C
≤T≤ 60 °C, it is impossible to be directly injected into stratum, the condenser of the fluid and sea water source heat pump unit of hot water storage tank outlet at this time
（26）Parallel connection, carries out heat supply in parallel, opening valve a, b, c, d, g, h, i, j, k, l, other valves are closed；
(3) solar energy is connected heat-supplying mode with sea water source heat pump：Temperature after solar thermal unit heating fluid is 20 °C
≤T≤ 40 °C, the fluid of hot water storage tank outlet enters sea water source heat pump unit evaporator 24, carries out series connection heat supply, opening valve a,
B, e, f, k, l, other valves are closed；
(4) the independent heat-supplying mode of sea water source heat pump：After solar thermal unit heating fluid,T≤ 10 °C, stop solar energy system
System work, utilizes sea water source heat pump independent heat supply g, h, k, l, other valves are closed；
(5) the independent heat-supplying mode of solar power generation unit：In the winter time, under the meteorological condition such as night or rainy days, solar energy collection
The heat that hot cell and sea water source heat pump unit provide can not meet the needs of gas hydrates heat injection method exploitation, and system can be by
Solar power generation unit heat supply, the spare electricity by discharging storage ensure that systems stay is run.
Claims (8)
- A kind of 1. gas hydrate mining methods based on solar energy-sea water source heat pump combined heat technology, it is characterised in that Step is as follows：(1) more than two mouthfuls of horizontal well is drilled out in gas hydrates reservoir using deep sea drilling technology；The horizontal well bag Include more than one recovery well and more than one extraction well；Perforation is set at recovery well horizontal segment position, for being stored up to hydrate Layer heated fluid injection；Gas and liquid collecting casing is set at extraction well horizontal segment position, for collecting the methane gas decomposed and produced；(2) maritime floating platform is built（22）, arrange solar thermal collector（1）, sea water source heat pump（10）, solar power generation dress Put（6）, monitor controller（20）And ancillary equipment, it is laid with the pipe to sea bottom hydrate reservoir recovery well input hot-fluid injection Road, superheater is set in recovery well vertical section bottom（14）, for heating hot-fluid injection, and in solar power generation unit and well Cable is set up between the superheater of bottom；The solar power generation unit includes storage battery（5）, device of solar generating（6）And control Conversion equipment processed（7）；(3) solar power generation unit is opened, photovoltaic battery plate, which is collected, radiation energy and can be converted into electric energy very much, and the electric energy of generation is used for Maintenance system inner compressor, superheater, the normal work of pump；(4) initial stage of production promotes gas hydrates to be decomposed by decompression mode, reaches and changes hydrate reservoir structure Purpose, a large amount of pore channels of inductive formation, improve reservoir permeability, contribute to diffusion of the hot-fluid injection in reservoir；When natural When gas hydrate reservoir pressure is down to less than 15% of hydrate phase balance pressure corresponding to reservoir temperature, the hot method exploitation of metaideophone, i.e., Hot-fluid injection is inputted by recovery well, hydrate reservoir is injected by horizontal segment perforation, promotes decomposition of hydrate；(5) in the hot method mining phase of hydrate metaideophone, by solar energy-sea water source heat pump combined heat, solar thermal collector is utilized The energy collected with sea water source heat pump is energized, and hot-fluid injection is pumped into after heating 60 ~ 100 °C from recovery well well head, through overheat After device heating, hydrate reservoir is injected by the perforation position of recovery well horizontal segment；(6) monitoring and controlling unit ensures the whole safe efficient operation of recovery process, passes through temperature and pressure sensor collection system System operation information, judges its operating status, and the operation of timely control valve, pump, realizes the switching of system operation mode, meets not Mining requirement with the conditions of.
- A kind of 2. gas hydrates based on solar energy-sea water source heat pump combined heat technology according to claim 1 Recovery method, it is characterised in that the hot-fluid injection is strong brine, methanol, ethylene glycol, seawater and its mixed solution.
- A kind of 3. gas hydrates based on solar energy-sea water source heat pump combined heat technology according to claim 1 Recovery method, it is characterised in that the superheater is electric heater, microwave applicator, ultrasonic generator and combinations thereof.
- A kind of 4. gas hydrates based on solar energy-sea water source heat pump combined heat technology according to claim 1 Recovery method, it is characterised in that depending on the switching of the system operation mode is according to ocean temperature and solar radiation power, specifically Following five kinds can be divided into：(1) the independent heat-supplying mode of solar thermal unit：Heat injection method initial stage of production, hydrate concentration is higher, required thermic load Smaller, the temperature that solar thermal unit provides is higher, fluid temperature (F.T.)T>=60 °C, meet mining requirement, without starting seawater Source heat pump unit；(2) solar energy heat-supplying mode in parallel with sea water source heat pump：Temperature after solar thermal unit heating fluid is 40 °C ≤T≤ 60 °C, it is impossible to be directly injected into stratum, the fluid of hot water storage tank outlet at this time and the condenser of sea water source heat pump unit are simultaneously Connection, carries out heat supply in parallel；(3) solar energy is connected heat-supplying mode with sea water source heat pump：Temperature after solar thermal unit heating fluid is 20 °C ≤T≤ 40 °C, into sea water source heat pump unit evaporator, carry out series connection heat supply；(4) the independent heat-supplying mode of sea water source heat pump：After solar thermal unit heating fluid,T≤ 10 °C, stop solar energy system System work, utilizes the independent heat supply of sea water source heat pump；(5) the independent heat-supplying mode of solar power generation unit：In the winter time, under the meteorological condition such as night or rainy days, solar energy collection The heat that hot cell and sea water source heat pump unit provide can not meet the needs of gas hydrates heat injection method exploitation, and system can be by Solar power generation unit heat supply, the spare electricity by discharging storage ensure that systems stay is run.
- A kind of 5. gas hydrate exploitation device based on solar energy-sea water source heat pump combined heat technology, it is characterised in that Including solar thermal collector（1）, hot water storage tank（2）, valve（3）, pump（4）, plate heat exchanger（9）, sea water source heat pump（10）, open Adopt well well head（11）, superstratum（12）, recovery well（13）, under cover stratum（15）, hydrate reservoir（16）, extraction well（17）、 Produce well well head（18）, gas-liquid separator（19）, maritime floating platform（22）, hot-fluid injection input pipe（23）, gas and liquid collecting set Pipe（24）And perforation（25）；The hydrate reservoir（16）It is internally provided with recovery well（13）With extraction well（17）, the extraction Well（17）It is provided outside extraction well well head（18）, the extraction well well head（18）With gas-liquid separator（19）Connection, the extraction Well（17）Horizontal segment is provided with gas and liquid collecting casing（24）, the recovery well（13）It is provided outside recovery well well head（11）, it is described Recovery well（13）Horizontal segment is provided with perforation（25）；The pump（4）, valve（3）, hot water storage tank（2）, solar thermal collector（1） It is sequentially connected with, and the solar thermal collector（1）Outlet and hot water storage tank（2）Connection, the hot water storage tank（2）Pass through heat injection Fluid input tube（23）With recovery well well head（11）Connection；The sea water source heat pump（10）, plate heat exchanger（9）Float with sea Platform（22）It is sequentially connected with, and maritime floating platform（22）Pass through pump and plate heat exchanger（9）, sea water source heat pump（10）Sequentially connect Connect, the sea water source heat pump（10）Pass through hot-fluid injection input pipe（23）With recovery well well head（11）Connection；The hot water storage tank （2）With plate heat exchanger（9）Between be provided with pipeline, the sea water source heat pump（10）With pump（4）Connection, the sea water source heat pump （10）With hot water storage tank（2）Connection；The hydrate reservoir（16）Positioned at superstratum（12）Lower section, covers stratum under being located at（15） Top.
- 6. the exploitation of gas hydrates dress based on solar energy-sea water source heat pump combined heat technology according to claim 5 Put, it is characterised in that further include storage battery（5）, device of solar generating（6）, control conversion equipment（7）And superheater （14）；The superheater（14）It is arranged at recovery well（13）It is interior, the superheater（14）Pass through cable（21）Turn with control Changing device（7）Connection, the control conversion equipment（7）Respectively with storage battery（5）, device of solar generating（6）Connection.
- 7. the exploitation of gas hydrates dress based on solar energy-sea water source heat pump combined heat technology according to claim 5 Put, it is characterised in that the recovery well（13）, extraction well（17）And hot water storage tank（2）Inside it is both provided with temperature and pressure sensing Device（8）, the temperature and pressure sensor（8）With monitor controller（20）Connection.
- 8. the exploitation of gas hydrates dress based on solar energy-sea water source heat pump combined heat technology according to claim 5 Put, it is characterised in that the sea water source heat pump（10）By evaporator（26）, compressor（27）, condenser（28）, throttling arrangement （29）And internal circulation pump（30）Composition；The evaporator（26）, compressor（27）, condenser（28）, throttling arrangement（29）With it is interior Circulating pump（30）Head and the tail connect.
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| CN115306353A (en) * | 2022-06-28 | 2022-11-08 | 广州海洋地质调查局 | Ultrasonic wave and microwave combined sand prevention and blockage removal method and device in hydrate exploitation |
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