KR20160141533A - Natural gas incoming system of flng and incoming method of natural gas - Google Patents
Natural gas incoming system of flng and incoming method of natural gas Download PDFInfo
- Publication number
- KR20160141533A KR20160141533A KR1020150077345A KR20150077345A KR20160141533A KR 20160141533 A KR20160141533 A KR 20160141533A KR 1020150077345 A KR1020150077345 A KR 1020150077345A KR 20150077345 A KR20150077345 A KR 20150077345A KR 20160141533 A KR20160141533 A KR 20160141533A
- Authority
- KR
- South Korea
- Prior art keywords
- nitrogen
- natural gas
- flng
- gas
- injection
- Prior art date
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000003345 natural gas Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 164
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 71
- 239000007789 gas Substances 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000003949 liquefied natural gas Substances 0.000 description 10
- 239000003507 refrigerant Substances 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
-
- 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
- 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
- E21B43/18—Repressuring or vacuum methods
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
The present invention relates to a system for introducing natural gas mined from a gas field in FLNG into FLNG, and a method for introducing the system.
Liquefied natural gas (LNG) is an eco-friendly fuel with low emissions of air pollutants during combustion, and its consumption is rapidly increasing worldwide. Generally, the liquefied gas is liquefied at the cryogenic temperature from the production site and then transported to the destination by a transporting line (LNGC, LNG Carrier). Since the volume of the liquefied natural gas liquefied at a cryogenic temperature is much smaller than that in the gaseous state, There is an advantage of facilitating the transfer.
Recently, LNG-FPSO (LNG Floating Production, Storage and Offloading, FLNG), which can produce, store and unload LNG in a floating structure, has been developed and used.
In other words, FLNG is moored in the natural gas area and takes in natural gas from the gas field by the gas inlet device, preprocesses the imported natural gas and liquefies it by the liquefaction device to produce liquefied natural gas, As shown in FIG.
In addition, LPG and condensate are produced separately during liquefaction and storage of natural gas.
To draw in the gas, a gas inlet device is installed in the gas reservoir, natural gas mined through a plurality of risers connected from the gas inlet device is introduced into the FLNG, Production process.
However, if natural gas is produced in the gas field for a long time, the pressure of the natural gas through the riser is lowered at the beginning of the gas field, and the viscosity of the natural gas is also increased, so that the amount of natural gas introduced into the FLNG is reduced do.
Therefore, there is a problem that the production amount of liquefied natural gas or the like is reduced.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a natural gas inlet system for FLNG which enables a natural gas extracted from a gas field to be supplied to a FLNG, The purpose of this method is to provide a method of introduction.
A natural gas inlet system for FLNG according to one aspect of the present invention includes a nitrogen generating device for generating nitrogen, a nitrogen compressing device for compressing nitrogen gas generated from the nitrogen generating device, and a nitrogen gas compressed by the nitrogen compressing device And a nitrogen gas injection device for injecting the nitrogen gas into the seabed gas layer.
The nitrogen generating device is a nitrogen generating device for liquefaction process provided in the FLNG.
The apparatus may further include a nitrogen storage tank for storing the nitrogen gas compressed by the nitrogen compression device.
Or an injection line extending from the nitrogen compression unit to the nitrogen injection unit and an injection pump for supplying nitrogen gas to the nitrogen injection unit through the injection line.
In addition, it may further include a natural gas inlet device installed on the sea floor, an inlet line extending from the natural gas inlet device to the FLNG, and a multi-stage compressor for increasing the inlet pressure of the natural gas introduced through the inlet line .
According to another aspect of the present invention, there is provided a natural gas inflow method for FLNG comprising a nitrogen generating step of generating nitrogen by a nitrogen generating device, a nitrogen compressing step of compressing the nitrogen gas generated in the nitrogen generating step, And a nitrogen injection step of injecting compressed nitrogen gas into the seam gas layer.
The method may further include a nitrogen storage step of storing the nitrogen gas compressed by the nitrogen compression step.
According to the FLNG natural gas inlet system and the inlet method of the present invention,
Even if the time elapses from the initial stage of production, the inlet pressure of the natural gas introduced into the FLNG from the gas field can be maintained.
The inlet pressure of the natural gas can be maintained so that the amount of the natural gas introduced into the FLNG is not reduced and the production amount of the natural gas and the condensate can be maintained.
The pressurized gas to be injected into the submarine gas layer is easily compatible with and used with existing facilities by using nitrogen generated through a nitrogen generator which is essentially provided in FLNG.
1 is a schematic representation of a natural gas inlet system for FLNG according to one aspect of the present invention.
In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.
The known techniques necessary for explaining the preferred embodiments of the present invention omit or reduce the description as necessary.
1 is a schematic representation of a natural gas inlet system for FLNG according to one aspect of the present invention.
Referring to FIG. 1, a FLNG natural
FLNG is a structure that develops natural gas from a gas field in the sea, liquefies and stores it on board, and unloads the stored liquefied natural gas to a customer or a liquefied natural gas carrier.
To this end, the FLNG is provided with a natural
The
However, unlike the initial stage of production, the inlet pressure of the natural gas introduced through the
To this end, the natural
The on-
The liquefaction process in the FLNG is a process of converting natural gas from which impurities have been removed by compression process into a liquid state through compression, condensation, expansion, and heat exchange steps, and rapidly expanding it with nitrogen as a refrigerant, In the natural gas inlet system of FLNG according to the present invention, nitrogen is used to liquefy the gas and the nitrogen generator is used in the FLNG using nitrogen as the refrigerant. .
As shown in the drawing, the natural
The
In addition, since the
The
As described above, according to the natural gas inflow system of FLNG and the inflow method of FLNG according to the present invention, nitrogen generated in the nitrogen generator, which is essential for the liquefaction process of natural gas in FLNG, is compressed, So that the production amount of natural gas and other condensate in the FLNG can be maintained.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention.
110: natural gas inlet device
111: incoming line
112: Multistage compressor
120: nitrogen separator
220: Nitrogen trapping device
130: nitrogen compression device
140: Nitrogen storage tank
150: nitrogen injection device
151: Injection line
152: Injection pump
Claims (7)
A nitrogen compression device for compressing the nitrogen gas generated from the nitrogen generating device; And
And a nitrogen gas injection device for injecting the nitrogen gas compressed by the nitrogen compression device into the sea bed gas layer,
Natural gas entry system of FLNG.
Characterized in that the nitrogen generating device is a nitrogen generating device for liquefaction process provided in the FLNG,
Natural gas entry system of FLNG.
Further comprising a nitrogen storage tank for storing nitrogen gas compressed by said nitrogen compression device.
Natural gas entry system of FLNG.
An injection line extending from the nitrogen compression unit to the nitrogen injection unit; And
Further comprising an injection pump for supplying nitrogen gas to the nitrogen injection apparatus through the injection line,
Natural gas entry system of FLNG.
A natural gas inlet device installed on the sea floor;
An inlet line extending from the natural gas inlet device onto the FLNG; And
Further comprising a multi-stage compressor for increasing the inlet pressure of the natural gas drawn through the inlet line,
Natural gas entry system of FLNG.
A nitrogen compression step of compressing the nitrogen gas generated in the nitrogen generating step; And
And a nitrogen injection step of injecting nitrogen gas compressed by the nitrogen compression step into the sea bed gas layer.
Natural gas inflow method of FLNG.
Further comprising a nitrogen storage step of storing nitrogen gas compressed by said nitrogen compression step,
Natural gas inflow method of FLNG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150077345A KR20160141533A (en) | 2015-06-01 | 2015-06-01 | Natural gas incoming system of flng and incoming method of natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150077345A KR20160141533A (en) | 2015-06-01 | 2015-06-01 | Natural gas incoming system of flng and incoming method of natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160141533A true KR20160141533A (en) | 2016-12-09 |
Family
ID=57574757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150077345A KR20160141533A (en) | 2015-06-01 | 2015-06-01 | Natural gas incoming system of flng and incoming method of natural gas |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20160141533A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200015727A (en) * | 2017-06-30 | 2020-02-12 | 치요다가코겐세츠가부시키가이샤 | Discharge System and Discharge Method of Liquefied Gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110072810A (en) | 2009-12-23 | 2011-06-29 | 대우조선해양 주식회사 | Ccs process with vessel transporting |
-
2015
- 2015-06-01 KR KR1020150077345A patent/KR20160141533A/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110072810A (en) | 2009-12-23 | 2011-06-29 | 대우조선해양 주식회사 | Ccs process with vessel transporting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200015727A (en) * | 2017-06-30 | 2020-02-12 | 치요다가코겐세츠가부시키가이샤 | Discharge System and Discharge Method of Liquefied Gas |
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| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |