WO2017209368A1 - 해양 설비, 부유식 원유 생산 설비 및 액화천연가스 생성 방법 - Google Patents
해양 설비, 부유식 원유 생산 설비 및 액화천연가스 생성 방법 Download PDFInfo
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- WO2017209368A1 WO2017209368A1 PCT/KR2017/000271 KR2017000271W WO2017209368A1 WO 2017209368 A1 WO2017209368 A1 WO 2017209368A1 KR 2017000271 W KR2017000271 W KR 2017000271W WO 2017209368 A1 WO2017209368 A1 WO 2017209368A1
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- Prior art keywords
- gas
- feed gas
- injection
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- unit
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- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 120
- 239000010779 crude oil Substances 0.000 title claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 86
- 239000007789 gas Substances 0.000 claims abstract description 525
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 15
- 238000007670 refining Methods 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims description 117
- 239000007924 injection Substances 0.000 claims description 117
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 230000006837 decompression Effects 0.000 claims description 23
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052753 mercury Inorganic materials 0.000 claims description 13
- 229930195733 hydrocarbon Natural products 0.000 claims description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 11
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 101000841267 Homo sapiens Long chain 3-hydroxyacyl-CoA dehydrogenase Proteins 0.000 description 2
- 102100029107 Long chain 3-hydroxyacyl-CoA dehydrogenase Human genes 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- JJYKJUXBWFATTE-UHFFFAOYSA-N mosher's acid Chemical compound COC(C(O)=O)(C(F)(F)F)C1=CC=CC=C1 JJYKJUXBWFATTE-UHFFFAOYSA-N 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
- F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0259—Modularity and arrangement of parts of the liquefaction unit and in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
- F25J1/0277—Offshore use, e.g. during shipping
- F25J1/0278—Unit being stationary, e.g. on floating barge or fixed platform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4473—Floating structures supporting industrial plants, such as factories, refineries, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
- F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/30—Compression of the feed stream
Definitions
- the present invention relates to an offshore facility, a floating crude oil production facility and a method for producing liquefied natural gas, and more particularly, a marine facility for producing liquefied natural gas using accompanying gas, a floating crude oil production facility thereof, and liquefied natural thereby It relates to a gas generating method.
- Floating Production Storage Offloading is an offshore complex structure that extracts crude oil from subsea oil fields, refines it, produces and stores refined oil products, and transfers them to other ships.
- crude oil refining crude oil is separated into oil and accompanying gas.
- the accompanying gas is burned or developed and then re-injected into another empty reservoir. If the accompanying gas separated from the crude oil in the offshore facility is discharged above a certain level necessary to maintain the pressure of the reservoir, the accompanying gas will be discarded to the sea floor in excess of that certain level, while the cost of gas re-injection is necessary. It will increase over.
- the gas injected into the reservoir can be flowed back to recover a back-flow gas
- an offshore facility includes a crude oil processing apparatus for collecting and refining crude oil in a subsea well, and a gas re-injection for compressing the accompanying gas separated in the crude oil refining process and reinjecting it into a reservoir.
- Crude oil production offshore plant with apparatus And a liquefied natural gas producing marine facility receiving a feed gas including at least a part of the accompanying gas from the crude oil producing marine facility, and processing and liquefying the supplied feed gas to produce liquefied natural gas.
- the crude oil producing offshore facility includes a feed gas supply unit that recovers a backflow gas into which the injected gas compressed by the gas reinjection apparatus flows back and generates the feed gas using the backflow gas.
- the feed gas supply unit includes a compression device that compresses the accompanying gas to have a first target pressure to generate a first feed gas, wherein the gas re-injection device comprises: the accompanying gas compressed by the compression device to the first gas; And a compressor for compressing to have a second target pressure higher than a target pressure to generate the injection gas, wherein the feed gas is from the first feed gas, the second feed gas decompressed from the backflow gas, and the injection gas. At least one of the decompressed third feed gas may be included.
- the gas re-injection apparatus further includes an injection line for re-injecting the injection gas into the reservoir
- the feed gas supply unit includes: a feed gas supply line for delivering the feed gas to the liquefied natural gas production marine facility; A backflow line branched from the injection line and joined to the feed gas supply line and recovering the backflow gas to the crude oil production offshore installation; And a first decompression unit installed in the backflow line to generate the second feed gas by reducing the backflow gas.
- the gas re-injection apparatus further includes a valve unit installed in the injection line to control injection of the injection gas, wherein the feed gas supply unit is branched from the injection line between the compressor and the valve unit to supply the feed gas.
- a second decompression unit installed in the injection gas recovery line to generate the third feed gas by reducing the injection gas.
- the first pressure reducing unit or the second pressure reducing unit may include a choke valve.
- the feed gas supply unit may further include a control valve installed in the feed gas supply line to control the supply of the first feed gas, wherein the backflow line and the injection gas recovery line respectively provide a supply direction of the feed gas. Can be joined to the downstream side of the control valve.
- the crude oil producing marine equipment may further include a control unit for controlling at least one of the control valve, the valve unit, the first pressure reducing unit, and the second pressure reducing unit according to the pressure of the first feed gas. .
- the control unit may include: when the pressure of the first feed gas satisfies a set pressure range, the control valve may be opened to supply the first feed gas to the liquefied natural gas producing marine facility, and the second feed gas and the When the supply of the third feed gas is cut off and the pressure of the first feed gas does not satisfy the set pressure range, at least one of the second feed gas and the third feed gas is the liquefied natural gas producing marine facility. At least one of the first pressure reducing unit and the second pressure reducing unit may be operated so as to be supplied to the second control unit, and the control valve may be blocked.
- the liquefied natural gas production offshore plant includes: a turret unit receiving the feed gas; A liquefied natural gas generating unit for processing and liquefying the feed gas to produce liquefied natural gas; And a plurality of storage tanks storing the liquefied natural gas and provided in one row along the longitudinal direction of the hull.
- the liquefied natural gas generating unit includes: an injection unit including a heating unit for heating the feed gas to a set temperature; An acid gas removal unit for removing acid gas from the heated feed gas provided from the injection unit; A dehydration and mercury removal unit for removing moisture and mercury from the feed gas from which the acidic gas is removed; And a liquefaction unit for liquefying the feed gas from which the moisture and mercury has been removed to produce liquefied natural gas, wherein the liquefied natural gas production offshore plant includes: heavy hydrocarbons for removing heavy hydrocarbons from the fluid produced by the liquefaction unit Removal unit; And a condensate transfer line for delivering the condensate containing the bihydrocarbons to the crude oil producing marine facility for treatment and stabilization of the bicarbonate.
- the turret device for pulling up the crude oil from the subsea well; Crude oil processing apparatus for refining the crude oil to produce oil; An oil storage device for storing oil produced by the crude oil processing device; A gas re-injection apparatus for compressing the accompanying gas separated in the crude oil refining process of the crude oil processing apparatus to generate an injection gas, and reinjecting the injection gas into a reservoir; And a feed gas supply unit for recovering a backflow gas into which the injection gas is flowed back, generating a feed gas using the backflow gas, and supplying the feed gas to a liquefied natural gas production unit.
- the feed gas supply unit may include: a compression device configured to generate the first feed gas by compressing the accompanying gas; And a feed gas supply line for delivering the first feed gas to the liquefied natural gas production unit, wherein the gas re-injection device comprises: a compressor for compressing the accompanying gas compressed by the compression device to generate the injection gas
- the feed gas may include at least one of the first feed gas, the second feed gas decompressed from the backflow gas, and the third feed gas decompressed from the injection gas.
- the gas reinjection apparatus comprises: an injection line for reinjecting the injection gas into the reservoir; And a valve unit installed in the injection line to control the injection of the injection gas, wherein the feed gas supply unit includes: a control valve installed in the feed gas supply line to control the supply of the first feed gas; A backflow line branched from the injection line and returning the backflow gas to the feed gas supply line; A first pressure reducing unit installed in the backflow line and configured to generate the second feed gas by reducing the backflow gas; An injection gas recovery line branched from the injection line between the compressor and the valve part and recovering the injection gas to the feed gas supply line; And a second decompression unit installed in the injection gas recovery line to generate the third feed gas by reducing the injection gas.
- a crude oil producing offshore plant collects and refines crude oil in a subsea well to separate oil and accompanying gas; Compressing the accompanying gas to have a first target pressure to produce a first feed gas, and providing the first feed gas to a feed gas supply line; Compressing the first feed gas to have a second target pressure to produce an injection gas, and reinjecting the injection gas into a reservoir; Depressurizing a backflow gas to which the injection gas flows back to generate a second feed gas, and recovering the second feed gas to the feed gas supply line; Reducing the injection gas to generate a third feed gas, and recovering the third feed gas to the feed gas supply line; Supplying a feed gas including at least one of the first feed gas, the second feed gas, and the third feed gas to the feed gas supply line; And there is provided a liquefied natural gas generation method comprising processing and liquefying the feed gas supplied through the feed gas supply line to produce a liquefied natural gas.
- the supply of the feed gas to the feed gas supply line may include: supplying the first feed gas to the feed gas supply line when the pressure of the first feed gas satisfies a set pressure range, and supplying the second feed gas to the feed gas supply line. And blocking the third feed gas from being supplied to the feed gas supply line. And when the pressure of the first feed gas does not satisfy the set pressure range, at least one of the second feed gas and the third feed gas is supplied to the feed gas supply line, and the first feed gas is It may include blocking the supply to the feed gas supply line.
- the gas re-injected into the reservoir is configured to be flowed back to recover the recovered backflow (by producing liquefied natural gas using back-flow) gas, productivity of liquefied natural gas using accompanying gas can be improved.
- FIG. 1 is a side view schematically showing an offshore facility 100 according to an embodiment of the present invention.
- FIG. 2 is a block diagram of a crude oil production offshore facility 120 constituting the offshore facility 100 according to an embodiment of the present invention.
- 3 to 6 are views for explaining the operation of the marine installation according to an embodiment of the present invention.
- FIG. 7 is a side view of the liquefied natural gas production marine facility 140 constituting the marine facility according to an embodiment of the present invention.
- FIG 8 is a plan view of a liquefied natural gas production marine facility 140 constituting the marine facility according to an embodiment of the present invention.
- FIG. 9 is a cross-sectional view taken along line AA ′ of FIG. 7.
- FIG. 10 is a configuration diagram of a liquefied natural gas generating unit 143 of a liquefied natural gas producing marine facility constituting the marine facilities according to an embodiment of the present invention.
- 1 is a side view schematically showing an offshore facility 100 according to an embodiment of the present invention.
- 2 is a block diagram of a crude oil production offshore facility 120 constituting the offshore facility 100 according to an embodiment of the present invention. 1 and 2, the marine facility 100 includes a crude oil producing marine facility 120 and a liquefied natural gas producing marine facility 140.
- Crude oil production offshore facility 120 collects crude oil 40 including hydrocarbon mixtures in well 30 of seabed 10 via riser 32.
- the crude oil production offshore facility 120 may include a turret apparatus, a crude oil processing apparatus 122, a gas reinjection apparatus 124, a feed gas supply unit 126, and a controller 128.
- the turret device draws up the crude oil from the reservoir 22 in the subsea well through the riser 32, reinjects the accompanying gas into the completed and discarded empty reservoir 20, and generates the feed gas using the accompanying gas.
- 60 may be provided to be delivered to the liquefied natural gas production offshore facility 140 side.
- the accompanying gas is being re-injected into the reservoir 20 which has been developed and discarded.
- the gas is not limited as illustrated and may be re-injected into the reservoir 22 being produced.
- the turret device may be mounted and operated in a vertical opening or a moon pool provided on the bow side of the hull.
- the crude oil processing apparatus 122 refines crude oil to produce oil, in which oil and accompanying gas are separated.
- the accompanying gas separated in the crude oil processing apparatus 122 is provided to the gas reinjection apparatus 124 via the feed gas supply unit 126.
- the feed gas supply unit 126 recovers a backflow gas in which the injection gas compressed by the gas reinjection device 124 flows back, and collects the feed gas (second feed gas) using the backflow gas. Configured to generate.
- the feed gas supply unit 126 may include a compression device 1261, a dehydration device 1262, a feed gas supply line 1262, a control valve 1264, a backflow line 1265, and a first pressure reducing unit. 1266, an injection gas recovery line 1267, and a second decompression unit 1268.
- the compression device 1261 may compress the accompanying gas to have a first target pressure to generate a first feed gas.
- the first target pressure may be 30-200 bar (eg, 70 bar).
- the first target pressure may be set to a pressure at which the production efficiency of Liquefied Natural Gas (LNG) by the feed gas is maximized.
- LNG Liquefied Natural Gas
- the dehydration device 1262 may remove moisture from the accompanying gas compressed by the compression device 1261 using a molecular filter or the like to reduce hydration and prevent malfunction of various facilities and blockage of the pipeline. have.
- the accompanying gas dehydrated by the dewatering device 1262 is provided to the feed gas supply line 1263 and the gas reinjecting device 124.
- the first feed gas refers to an accompanying gas that flows into the feed gas supply line 1263 from the accompanying gas compressed by the compression device 1261.
- the feed gas supply line 1263 is provided to connect between the crude oil production offshore facility 120 and the turret unit of the liquefied natural gas production offshore facility 140, thereby feeding the feed gas 60 to the liquefied natural gas production offshore facility 140. Can be delivered to.
- the feed gas supply line 1263 is composed of a submarine pipe and a riser via the seabed 10, and is connected between a crude oil production offshore facility 120 and a liquefied natural gas production offshore facility 140. However, it may be provided to connect between the crude oil production offshore facility 120 and the liquefied natural gas production offshore facility 140 without passing through the seabed 10.
- the control valve 1264 may be installed in the feed gas supply line 1263 to adjust the supply of the first feed gas provided through the compression device 1261 and the dehydration device 1262.
- the first feed gas is provided to the liquefied natural gas production offshore facility 140 via a feed gas supply line 1263.
- the closing operation of the control valve 1264 the supply of the first feed gas to the liquefied natural gas production offshore installation 140 is interrupted.
- the control valve 1264 may be provided as an on-off valve, or may be provided as a valve that can adjust the opening degree.
- the control valve 1264 operates by an electrical signal or hydraulic pressure, and may be provided as a valve that can be remotely controlled.
- the gas re-injection device 124 may include a compressor 1241, an injection line 1242 and a valve unit 1243.
- the compressor 1241 causes the accompanying gas compressed by the compression device 1261 to carry a second target pressure (eg, 100 ⁇ ) higher than the first target pressure of the compression device 1261. 2000 bar) to produce an injection gas.
- a second target pressure eg, 100 ⁇
- injection gas 50 compressed at high pressure by high output compressor 1241 is reinjected into reservoir 20 via injection line 1242.
- the valve portion 1243 is installed in the injection line 1242 to control the injection of the injection gas 50.
- the valve unit 1243 may be provided as an on-off valve or a valve that can adjust an opening degree.
- the valve unit 1243 operates by an electric signal or hydraulic pressure, and may be provided as a valve capable of remote control.
- the backflow line 1265 may branch from the injection line 1242 and join the feed gas supply line 1263.
- the backflow gas 52 formed by the injection gas 50 flowing back from the reservoir 20 may be recovered through the backflow line 1265 to the feed gas supply line 1263 on the side of the crude oil production offshore facility 120.
- the backflow line 1265 may join the downstream side of the control valve 1264 based on the feed direction of the feed gas.
- the first pressure reducing unit 1266 is installed in the backflow line 1265, and generates the second feed gas by reducing the backflow gas 52.
- the first decompression unit 1266 is a pressure (for example, 30-) to maximize the production efficiency of the liquefied natural gas by the feed gas pressure of the backflow gas 52 (for example, 100-2000 bar) 200 bar).
- the first pressure reducing unit 1266 may be provided as a valve having an opening and closing function as well as a pressure reducing function.
- the first pressure reducing unit 1266 may be provided as, for example, a choke valve.
- a backflow gas (second feed gas) reduced in pressure at an appropriate pressure may be supplied to the feed gas supply line 1263.
- the second feed gas is blocked without being supplied to the feed gas supply line 1263.
- the injection gas recovery line 1267 may branch from the injection line 1242 between the compressor 1241 and the valve portion 1243 of the gas reinjection device 124 and join the feed gas supply line 1263. At least a portion of the accompanying gas (injection gas) compressed by the compressor 1241 may be returned to the feed gas supply line 1263 through the injection gas recovery line 1267.
- the injection gas recovery line 1267 may be joined to the downstream side of the control valve 1264 based on the feed direction of the feed gas.
- the second decompression unit 1268 is installed in the injection gas recovery line 1267 and generates a third feed gas by reducing the injection gas.
- the second decompression unit 1268 is a pressure (for example, 100-2000 bar) of the injection gas to a pressure that can maximize the production efficiency of the liquefied natural gas by the feed gas ( For example, 30-200 bar).
- the second pressure reducing unit 1268 may be provided as a valve having an opening and closing function as well as a pressure reducing function.
- the second pressure reducing unit 1268 may be provided as, for example, a choke valve.
- an injection gas (third feed gas) reduced in pressure at an appropriate pressure may be supplied to the feed gas supply line 1263.
- the third feed gas is cut off without being supplied to the feed gas supply line 1263.
- the feed gas supplied to the liquefied natural gas production offshore facility 140 through the feed gas supply line 1263 is the first feed gas compressed by the compression device 1261 and the backflow gas by the first decompression unit 1266. At least one of the second feed gas decompressed from the 52, and the third feed gas decompressed from the injection gas 50 by the second decompression unit 1268 may be included.
- the liquefied natural gas production offshore facility 140 receives a feed gas 60 including at least a portion of accompanying gas from the crude oil production offshore facility 120 through a feed gas supply line 1263 and processes the supplied feed gas. And liquefy to produce liquefied natural gas.
- Condensate 70 including heavy hydrocarbons removed in this process may be delivered to the crude oil production offshore facility 120 through the condensate transfer line 1269 for the treatment and stabilization of heavy hydrocarbons.
- the supply of feed gas to the liquefied natural gas production offshore facility 140 may be controlled by the controller 128.
- the controller 128 may control the supply of the feed gas 60 by controlling at least one of the control valve 1264, the valve part 1243, the first pressure reducing part 1266, and the second pressure reducing part 1268. have.
- FIG. 3 to 6 are views for explaining the operation of the marine installation according to an embodiment of the present invention.
- the valves in the open state are shown in shades, and the valves and lines in the closed state are shown in dashed lines.
- the controller when the accompanying gas (first feed gas) compressed by the compression device 1261 is supplied at a normal pressure satisfying a set pressure range (for example, 70 bar), the controller ( As illustrated in FIG. 3, the control valve 1264 may open and block the first pressure reducing unit 1266 and the second pressure reducing unit 1268. Accordingly, the accompanying gas (first feed gas) compressed by the compression device 1261 through the feed gas supply line 1263 is supplied to the liquefied natural gas production offshore facility 140, and the processing for the first feed gas Liquefied natural gas is produced by liquefaction.
- a set pressure range for example, 70 bar
- the pressure of the first feed gas provided by the compression device 1261 may be a component or pressure of the accompanying gas separated from the crude oil processing device 122, external environmental factors such as the ambient temperature of the compression device 1261, the compression device 1261. ), Depending on factors such as errors due to aging.
- the accompanying gas (first feed gas) compressed by the compression device 1261 does not satisfy the set pressure range (eg, 70 bar).
- the control unit 128 shuts off the control valve 1264, as shown in FIG. 4, and the valve unit 1243 and the first pressure reducing unit 1266. And the second pressure reducing unit 1268 is operated.
- the second feed gas decompressed from the backflow gas 52 and the third feed gas decompressed from the injection gas 50 are transferred to the liquefied natural gas production marine facility 140 through the feed gas supply line 1263. It is supplied, and liquefied natural gas is produced by processing and liquefaction with a 2nd feed gas and a 3rd feed gas.
- the controller 128 is configured such that the pressure of the feed gas including the second feed gas and the third feed gas supplied through the feed gas supply line 1263 satisfies a set pressure range (for example, 70 bar), The decompression ratio of the decompression unit 1266 and / or the second decompression unit 1268 may be adjusted.
- the controller 128 simultaneously performs gas re-injection for maintaining the internal pressure of the reservoir and liquefied natural gas production using the feed gas.
- the control valve 1264 may be opened to block the first pressure reducing part 1266 and the second pressure reducing part 1268.
- the controller 128 operates the gas re-injection device 124, blocks the first feed gas, and blocks the second feed gas even though the pressure of the first feed gas satisfies the set pressure range.
- the third feed gas can be supplied as the feed gas.
- the injection gas 50 will mostly be reinjected into the reservoir 20 and the backflow gas 52 may be relatively less refluxed.
- the amount of backflow of the backflow gas 52 may also increase in proportion to the internal pressure of the reservoir 20.
- the embodiment of the present invention when the internal pressure of the reservoir 20 is low and the internal pressure of the reservoir is required, a gas reinjection effect of a predetermined level or more can be secured, and the gas of the reservoir 20 is re-injected.
- the backflow gas 52 which increases in proportion to the internal pressure of the reservoir 20 can be utilized, so that the accompanying gas more than necessary is transferred to the reservoir 20. It is possible to prevent inflow and waste, and to increase liquefied natural gas productivity by using the backflow gas 52 which is flowed back without being re-injected into the reservoir 20.
- the control unit 128 blocks the control valve 1264, the valve unit 1243, and the first pressure reducing unit 1266, and operates the second pressure reducing unit 1268 as shown in FIG. 5.
- Feed gas may be supplied to the liquefied natural gas production marine facility 140 through the feed gas supply line (1263).
- the compressor 1241 is not intended to increase the pressure of the gas re-injected into the reservoir 20, but means for controlling the pressure of the feed gas 60 supplied through the feed gas supply line 1263 to an appropriate level. It is utilized as.
- the control 128 may further open the control valve 1264.
- the controller 128 adjusts the pressure of the feed gas including the first feed gas and the third feed gas supplied through the feed gas supply line 1263 to satisfy a set pressure range (for example, 70 bar).
- the opening degree of the valve 1264 may be adjusted, or the decompression level of the second decompression unit 1268 may be adjusted.
- the control unit 128 blocks the control valve 1264 and the first pressure reducing unit 1266, as shown in FIG. 6, and the valve unit 1243. And the first pressure reducing unit 1266 to operate to supply the second feed gas to the liquefied natural gas production marine facility 140 through the feed gas supply line 1263.
- the control unit 128 may further open the control valve 1264.
- the controller 128 adjusts the pressure of the feed gas including the first feed gas and the third feed gas supplied through the feed gas supply line 1263 to satisfy a set pressure range (for example, 70 bar).
- the opening degree of the valve 1264 may be adjusted or the decompression level of the first decompression unit 1266 may be adjusted.
- the feed gas is generated by utilizing the configuration of the gas re-injection apparatus 124 provided for compressing and reinjecting the accompanying gas. Since the liquefied natural gas can be generated using the gas, the utility of the accompanying gas can be improved by utilizing the accompanying gas for gas reinjection or liquefied natural gas production according to various circumstances. In addition, it is possible to select and utilize various feed gases (first to third feed gases), widen the adjustment range of the feed gas pressure, control the feed gas pressure precisely and efficiently, and improve the production efficiency of liquefied natural gas. It can be maximized. According to an embodiment of the present invention, the liquefied natural gas produced using the accompanying gas can be transported by a small LNG transporter or the like, or exported for economic use.
- Crude oil production offshore facilities may be provided with a crude oil storage tank, an offloading unit for unloading crude oil stored in the crude oil storage tank.
- the offloading unit may be provided on the side of the hull to supply crude oil contained in the crude oil storage tank to a crude oil carrier or where necessary.
- the offloading unit may include a plurality of loading arms to supply crude oil contained in the crude oil storage tank to a transport ship.
- a mooring device may be provided in the crude oil producing offshore plant for mooring the crude oil producing offshore plant or the crude oil transport ship.
- the mooring device may include a wire, a drum on which the wire is wound, a drive motor for rotating the drum, and a hook for binding the wire to the hull.
- the present invention is not limited thereto, and various methods and devices capable of realizing stable mooring of the hull may be employed.
- the liquefied natural gas has been described for the example produced in the liquefied natural gas production offshore installation, when the liquefied natural gas generating unit is provided in the crude oil producing offshore installation, the feed gas is liquefied natural in the crude oil producing offshore installation It can also be delivered to a gas generating unit to produce liquefied natural gas.
- the crude oil generating offshore facility may be further provided with an LNG storage tank.
- FIG. 7 is a side view of the liquefied natural gas production marine facility 140 constituting the marine facility according to an embodiment of the present invention.
- 8 is a plan view of a liquefied natural gas production marine facility 140 constituting the marine facility according to an embodiment of the present invention.
- 9 is a cross-sectional view taken along line AA ′ of FIG. 7.
- the LNG production marine facility 140 includes a hull 141, a turret unit 142 installed on the hull 141, a liquefied natural gas generating unit 143, and a plurality of LNG.
- Storage tank 144, off-loading unit 145 and the cooling control unit 146 may be provided.
- the liquefied natural gas production offshore installation 140 may be provided as a small offshore installation consisting of a minimum number of modules.
- the topside module of the liquefied natural gas production offshore facility 140 may be operated to have an LNG production capacity of, for example, 0.8-1.0 MTPA (annual average yield).
- the turret unit 142 may be provided to receive the feed gas 60 provided through the feed gas supply line 1263 from the crude oil production offshore facility 120.
- the turret unit 142 may be mounted and operated in a vertical opening or a moon pool provided at the bow side of the hull 141.
- the liquefied natural gas generation unit 143 processes and liquefies the feed gas supplied from the crude oil production offshore facility 120 to produce liquefied natural gas.
- 10 is a configuration diagram of a liquefied natural gas generating unit 143 of a liquefied natural gas producing marine facility constituting the marine facilities according to an embodiment of the present invention.
- the liquefied natural gas generating unit 143 includes an injection unit 1431, an acidic gas removal unit 1432, a dehydration and mercury removal unit 1433, a liquefaction unit 1434, and a heavy hydrocarbon removal unit ( 1436).
- the injection unit 1431 receives the feed gas supplied through the feed gas supply line 1263 from the turret unit 142.
- injection The unit 1431 may include a heating unit for heating the feed gas to an appropriate temperature for gas treatment.
- the acidic gas removal unit 1432 removes the acidic gas from the heated feed gas provided from the injection unit 1431.
- the acidic gas removal unit 1432 can remove impurities such as carbon dioxide and sulfur contained in the feed gas by an amine adsorption process or the like.
- the dehydration and mercury removal unit 1433 removes moisture by regenerative molecular sieve beds and the like to prevent freezing of the liquid and to protect the aluminum installation used in the liquefaction unit 1434.
- the dehydration and mercury removal unit 1433 may remove mercury from the moisture-removed dry gas using a non-regenerative metal sulphide adsorbent bed.
- the dehydration and mercury removal unit 1433 removes moisture so that the feed gas satisfies the H 2 O condition of 1 ppmv or less, and mercury is removed to a level of 0.01 microgram / Sm 3 .
- the liquefaction unit 1434 liquefies the feed gas from which moisture and mercury were removed to generate liquefied natural gas.
- the liquefaction unit 1434 may include a compressor for pressurizing the feed gas and a cooler for cooling the heated boil-off gas while passing through the compressor, and the feed gas by heat exchange between the pressurized gas and the refrigerant supplied by the cooling plant. Can be liquefied.
- the cooling plant may include a compressor, a condenser, an expander, and an evaporator, and may sequentially cool the refrigerant to each component to generate a cryogenic refrigerant.
- the heavy hydrocarbon removal unit 1434 removes the heavy hydrocarbons from the fluid produced by the liquefaction unit 1434.
- condensates comprising bihydrocarbons may be delivered to the crude oil production offshore facility 140 via the condensate transfer line 1269.
- the liquefied natural gas produced by the liquefaction unit 1434 may be supplied to and accommodated in a plurality of LNG storage units (storage tanks). 7 to 9, the plurality of storage tanks 144 stores liquefied natural gas and is provided in one row along the longitudinal direction of the hull 141 from the port to the starboard without a centerline bulkhead. Can be.
- the plurality of storage tanks 144 may be provided as a low capacity tank of approximately 40,000 m 3 .
- a plurality of storage tanks are arranged in a plurality of rows such as two or three rows in order to minimize structural stability of the topside facility arrangement and sloshing load generated at sea.
- the topside facility of the liquefied natural gas production marine facility 140 is provided with a specification of 0.8-1.0 MTPA (annual average yield), so that the hull 141 is stored for miniaturization or compactness Tanks 144 may be arranged in one row along the longitudinal direction of the hull 141.
- the storage tank 144 may be provided as a cargo hold of the membrane type insulated to minimize the vaporization of the liquefied natural gas received therein by the external heat intrusion.
- the storage tank 144 may be formed of a Mark III membrane type, but is not limited thereto.
- a delivery pump for transmitting liquefied natural gas to the outside may be provided inside the storage tank 144 so as to easily supply the liquefied natural gas contained therein.
- the offloading unit 145 is provided at the side portion of the hull 141 to supply the liquefied natural gas contained in the storage tank 144 to the need.
- the offloading unit 145 may include a plurality of loading arms to supply the liquefied natural gas contained in the storage tank 144 to the liquefied natural gas transport ship (LNG Carrier).
- LNG carriers can be provided by small vessels and can transport LNG to geographically close LNG plants or LNG storage facilities.
- Each loading arm may be provided including a multi-pipe, a flexible pipe, etc. in which a plurality of arms are hinged to be coupled to a pipeline of various sizes and shapes.
- the loading arm may be provided with a fluid line and an evaporation gas line for smooth transfer of the liquefied natural gas, and the inlet side end of the loading arm is connected to a delivery pump inside the storage tank to accommodate the liquefied natural gas contained in the storage tank 144.
- Received, but the outlet side end of the loading arm may be provided with a cryogenic connector to be stably coupled with the pipeline of the need.
- a mooring device may be provided for mooring a LNG facility or an LNG carrier.
- the mooring device may include a wire, a drum on which the wire is wound, a driving motor for rotating the drum, and a hook for binding the wire with the hull 141.
- the present invention is not limited thereto, and various methods and devices capable of implementing stable mooring of the hull 141 may be employed.
- Unexplained reference numerals 148, 149, 150, and 151 are located on the sides of residential quarters, ballast tanks filled with ballast water, and storage tanks 144, where residents who work in the LNG facility offshore facilities are located. It is a flare tower for combusting the formed cofferdam, waste gas generated during gas treatment and liquefaction.
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Abstract
Description
Claims (15)
- 해저웰로부터 수집된 원유를 정유하여 오일을 생산하는 원유 처리 장치와, 원유 정유 과정에서 분리된 수반 가스를 압축하여 리저버(reservoir)로 재주입시키는 가스 재주입 장치를 갖는 원유 생산 해양 설비; 및상기 원유 생산 해양 설비로부터 상기 수반 가스 중의 적어도 일부를 포함하는 피드 가스를 공급받고, 상기 피드 가스를 처리하고 액화하여 액화천연가스를 생산하는 액화천연가스 생산 해양 설비를 포함하며,상기 원유 생산 해양 설비는 상기 가스 재주입 장치에 의해 압축된 주입 가스가 역류되어 형성되는 백플로우 가스를 회수하고, 상기 백플로우 가스를 이용하여 상기 피드 가스를 생성하는 피드가스 공급부를 구비하는 해양 설비.
- 제1 항에 있어서,상기 피드가스 공급부는 상기 수반 가스를 제1 목표 압력을 갖도록 압축하여 제1 피드 가스를 생성하는 압축 장치를 포함하고,상기 가스 재주입 장치는: 상기 압축 장치에 의해 압축된 수반 가스를 상기 제1 목표 압력보다 높은 제2 목표 압력을 갖도록 압축하여 상기 주입 가스를 생성하는 압축기를 포함하고,상기 피드 가스는 상기 제1 피드 가스, 상기 백플로우 가스로부터 감압된 제2 피드 가스, 및 상기 주입 가스로부터 감압된 제3 피드 가스 중의 적어도 하나를 포함하는 해양 설비.
- 제2 항에 있어서,상기 가스 재주입 장치는 상기 주입 가스를 상기 리저버로 재주입시키는 주입 라인을 더 포함하고,상기 피드가스 공급부는:상기 피드 가스를 상기 액화천연가스 생산 해양 설비로 전달하는 피드가스 공급라인;상기 주입 라인으로부터 분기되어 상기 피드가스 공급라인으로 합류되고, 상기 백플로우 가스를 상기 원유 생산 해양 설비로 회수하는 백플로우 라인; 및상기 백플로우 가스를 감압하여 상기 제2 피드 가스를 생성하는 제1 감압부를 더 포함하는 해양 설비.
- 제3 항에 있어서,상기 제1 감압부는 상기 백플로우 라인에 설치되는 초크 밸브를 포함하는 해양 설비.
- 제3 항에 있어서,상기 가스 재주입 장치는 상기 주입 라인에 설치되어 상기 주입 가스의 주입을 조절하는 밸브부를 더 포함하고,상기 피드가스 공급부는:상기 압축기와 상기 밸브부 사이에서 상기 주입 라인으로부터 분기되어 상기 피드가스 공급라인으로 합류되는 주입가스 회수라인; 및상기 주입가스 회수라인에 설치되고, 상기 주입 가스를 감압하여 상기 제3 피드 가스를 생성하는 제2 감압부를 더 포함하는 해양 설비.
- 제5 항에 있어서,상기 피드가스 공급부는:상기 피드가스 공급라인에 설치되어 상기 제1 피드 가스의 공급을 조절하는 조절 밸브를 더 포함하고,상기 백플로우 라인 및 상기 주입가스 회수라인은 각각 상기 피드 가스의 공급 방향을 기준으로 상기 조절 밸브의 하류 측에 합류되는 해양 설비.
- 제6 항에 있어서,상기 원유 생산 해양 설비는:상기 제1 피드 가스의 압력에 따라, 상기 조절 밸브, 상기 밸브부, 상기 제1 감압부, 및 상기 제2 감압부 중의 적어도 하나를 제어하는 제어부를 더 포함하는 해양 설비.
- 제7 항에 있어서,상기 제어부는:상기 제1 피드 가스의 압력이 설정된 압력 범위를 만족하는 경우, 상기 제1 피드 가스가 상기 액화천연가스 생산 해양 설비로 공급되도록 상기 조절 밸브를 개방하고, 상기 제2 피드 가스 및 상기 제3 피드 가스의 공급을 차단하며,상기 제1 피드 가스의 압력이 상기 설정된 압력 범위를 만족하지 않는 경우, 상기 제2 피드 가스 및 상기 제3 피드 가스 중의 적어도 하나가 상기 액화천연가스 생산 해양 설비로 공급되도록 상기 제1 감압부 및 상기 제2 감압부 중의 적어도 하나를 작동시키고, 상기 조절 밸브를 차단하는 해양 설비.
- 제1 항에 있어서,상기 액화천연가스 생산 해양 설비는:상기 피드 가스를 공급받는 터렛 유닛;상기 피드 가스를 처리하고 액화시켜 액화천연가스를 생산하는 액화천연가스 생성 유닛; 및상기 액화천연가스를 저장하고, 상기 선체의 길이 방향을 따라 1열로 마련되는 복수개의 저장탱크를 포함하는 해양 설비.
- 제9 항에 있어서,상기 액화천연가스 생성 유닛은:상기 피드 가스를 설정 온도로 가열하는 가열부를 포함하는 주입 유닛;상기 주입 유닛으로부터 제공되는 가열된 피드 가스에서 산성 가스를 제거하는 산성가스 제거 유닛;상기 산성 가스가 제거된 피드 가스에서 수분 및 수은을 제거하는 탈수 및 수은제거 유닛; 및상기 수분 및 수은이 제거된 피드 가스를 액화하여 액화천연가스를 생성하는 액화 유닛을 포함하며,상기 액화천연가스 생산 해양 설비는:상기 액화 유닛에 의해 생성된 유체에서 중탄화수소를 제거하는 중탄화수소 제거 유닛; 및상기 중탄화수소의 처리 및 안정화를 위해 상기 중탄화수소를 포함하는 콘덴세이트를 상기 원유 생산 해양 설비로 전달하는 콘덴세이트 이송라인을 더 포함하는 해양 설비.
- 해저웰에서 원유를 뽑아 올리는 터렛 장치;상기 원유를 정유하여 오일을 생산하는 원유 처리 장치;상기 원유 처리 장치에 의해 생산된 오일을 저장하는 오일 저장 장치;상기 원유 처리 장치의 원유 정유 과정에서 분리된 수반 가스를 압축하여 주입 가스를 생성하고, 상기 주입 가스를 리저버(reservoir)로 재주입시키는 가스 재주입 장치; 및상기 주입 가스가 역류되어 형성되는 백플로우 가스를 회수하고, 상기 백플로우 가스를 이용하여 피드 가스를 생성하고, 상기 피드 가스를 액화천연가스 생산 유닛 측으로 공급하는 피드가스 공급부를 포함하는 부유식 원유 생산 설비.
- 제11 항에 있어서,상기 피드가스 공급부는:상기 수반 가스를 압축하여 제1 피드 가스를 생성하는 압축 장치; 및상기 제1 피드 가스를 상기 액화천연가스 생산 유닛 측으로 전달하는 피드가스 공급라인을 포함하고,상기 가스 재주입 장치는:상기 압축 장치에 의해 압축된 수반 가스를 압축하여 상기 주입 가스를 생성하는 압축기를 포함하고,상기 피드 가스는 상기 제1 피드 가스, 상기 백플로우 가스로부터 감압된 제2 피드 가스, 및 상기 주입 가스로부터 감압된 제3 피드 가스 중의 적어도 하나를 포함하는 부유식 원유 생산 설비.
- 제12 항에 있어서,상기 가스 재주입 장치는:상기 주입 가스를 상기 리저버로 재주입시키는 주입 라인; 및상기 주입 라인에 설치되어 상기 주입 가스의 주입을 조절하는 밸브부를 더 포함하고,상기 피드가스 공급부는:상기 피드가스 공급라인에 설치되어 상기 제1 피드 가스의 공급을 조절하는 조절 밸브;상기 주입 라인으로부터 분기되고, 상기 백플로우 가스를 상기 피드가스 공급라인으로 회수하는 백플로우 라인;상기 백플로우 라인에 설치되고, 상기 백플로우 가스를 감압하여 상기 제2 피드 가스를 생성하는 제1 감압부;상기 압축기와 상기 밸브부 사이에서 상기 주입 라인으로부터 분기되고, 상기 주입 가스를 상기 피드가스 공급라인으로 회수하는 주입가스 회수라인; 및상기 주입가스 회수라인에 설치되고, 상기 주입 가스를 감압하여 상기 제3 피드 가스를 생성하는 제2 감압부를 더 포함하는 부유식 원유 생산 설비.
- 원유 생산 해양 설비가 해저웰에서 원유를 수집하고 정유하여 오일과 수반 가스로 분리하는 것;상기 수반 가스를 제1 목표 압력을 갖도록 압축하여 제1 피드 가스를 생성하고, 상기 제1 피드 가스를 피드가스 공급라인 측으로 제공하는 것;상기 제1 피드 가스를 제2 목표 압력을 갖도록 압축하여 주입 가스를 생성하고, 상기 주입 가스를 리저버(reservoir)로 재주입시키는 것;상기 주입 가스가 역류되어 형성되는 백플로우 가스를 감압하여 제2 피드 가스를 생성하고, 상기 제2 피드 가스를 상기 피드가스 공급라인 측으로 회수하는 것;상기 주입 가스를 감압하여 제3 피드 가스를 생성하고, 제3 피드 가스를 상기 피드가스 공급라인 측으로 회수하는 것;상기 제1 피드 가스, 상기 제2 피드 가스 및 상기 제3 피드 가스 중의 적어도 하나를 포함하는 피드 가스를 상기 피드가스 공급라인으로 공급하는 것; 그리고상기 피드가스 공급라인을 통해 공급되는 상기 피드 가스를 처리하고 액화하여 액화천연가스를 생성하는 것을 포함하는 액화천연가스 생성 방법.
- 제14 항에 있어서,상기 피드 가스를 상기 피드가스 공급라인으로 공급하는 것은:상기 제1 피드 가스의 압력이 설정된 압력 범위를 만족하는 경우, 상기 제1 피드 가스를 상기 피드가스 공급라인으로 공급하고, 상기 제2 피드 가스 및 상기 제3 피드 가스가 상기 피드가스 공급라인으로 공급되지 않도록 차단하는 것; 그리고상기 제1 피드 가스의 압력이 상기 설정된 압력 범위를 만족하지 않는 경우, 상기 제2 피드 가스 및 상기 제3 피드 가스 중의 적어도 하나를 상기 피드가스 공급라인으로 공급하고, 상기 제1 피드 가스가 상기 피드가스 공급라인으로 공급되지 않도록 차단하는 것을 포함하는 액화천연가스 생산 방법.
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