CN116677923A - FPSO remote replacement emptying system and method in typhoon mode - Google Patents
FPSO remote replacement emptying system and method in typhoon mode Download PDFInfo
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- CN116677923A CN116677923A CN202310669035.3A CN202310669035A CN116677923A CN 116677923 A CN116677923 A CN 116677923A CN 202310669035 A CN202310669035 A CN 202310669035A CN 116677923 A CN116677923 A CN 116677923A
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- control valve
- remote control
- outlet
- crude oil
- separator
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000010779 crude oil Substances 0.000 claims abstract description 164
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 160
- 239000007789 gas Substances 0.000 claims abstract description 117
- 238000004519 manufacturing process Methods 0.000 claims abstract description 114
- 239000007788 liquid Substances 0.000 claims abstract description 78
- 230000018044 dehydration Effects 0.000 claims abstract description 75
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 75
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims description 109
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 23
- 239000002737 fuel gas Substances 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 238000005191 phase separation Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/18—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Abstract
The invention relates to an FPSO remote replacement emptying system in typhoon mode, which comprises a crude oil treatment system, a remote replacement system and a nitrogen system; the crude oil treatment system comprises a liquid inlet device, a heat exchanger, a separator assembly, a filter, a dehydration device, a gas treatment remote control valve assembly, a crude oil treatment device, a crude oil treatment remote control valve assembly, a production water treatment device and a production water remote control valve assembly; the remote replacement system comprises a water supply device, a disqualified crude oil tank, a first remote control valve and a second remote control valve, and the nitrogen system comprises a nitrogen supply device and an air inlet remote control valve assembly. The invention adopts various replacement processes and redundant replacement medium setting, improves the switching and selecting reliability of the remote control process, and can also utilize the pressure of the hydraulic accumulator to switch the valve under the working condition without a power source.
Description
Technical Field
The invention relates to the technical field of remote control ocean oilfield production operation, in particular to an FPSO remote replacement evacuation system and an evacuation method under typhoon mode.
Background
Offshore oil and gas fields in the south China sea area have long suffered from typhoons, even if typhoons are not passed through the oil field at the center, the oil field is removed at least 72 hours at a time. Aiming at the problems, based on the background of offshore platform automation and digital upgrading, when extremely dangerous working conditions such as typhoons are temporary, the mode of avoiding the platform to delay production stopping in the unmanned standing mode of the oil field is adopted, so that yield loss caused by typhoons can be effectively reduced.
The delayed production stopping of the oil field in the unmanned standing mode refers to the period from the time when personnel are removed from the offshore production facility (the facility is in an unmanned state) to the time when typhoon is stopped, and the remote monitoring of various offshore production facilities is realized on land, so that the purposes of real-time monitoring, remote operation and safe stopping are achieved.
However, crude oil in offshore oil fields has a high congealing point, and the risk of congealing exists because the crude oil cannot be replaced after production is stopped. Meanwhile, typhoons come temporarily, general stormy waves at sea are large, under a remote control mode, FPSO swing is likely to become the most primary factor for triggering production shutdown, namely, FPSO swing causes liquid level swing of a separator, treatment effect is deteriorated, products are not up to standard or liquid level disturbance of the separator causes failure of a regulating valve, and even liquid level is high or low to be shut off.
Therefore, there is a need for a remote replacement evacuation system and evacuation method for FPSO in typhoon mode, which can prevent the safety production accident caused by the bumping and swaying of the tank in typhoon mode.
Disclosure of Invention
The invention aims to provide a remote replacement and evacuation system for an FPSO in typhoon mode, which solves the problems that in the background art, the replacement cannot be performed after remote production stopping, the risk of blockage exists, and safety production accidents caused by bumping and swinging of a tank body are influenced by typhoons.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a FPSO remote replacement evacuation system in typhoon mode comprises a crude oil treatment system, a remote replacement system and a nitrogen system;
the crude oil treatment system comprises a liquid inlet device, a heat exchanger, a separator assembly, a filter, a dehydration device, a gas treatment remote control valve assembly, a crude oil treatment device, a crude oil treatment remote control valve assembly, a production water treatment device and a production water remote control valve assembly;
the heat exchanger comprises a heat exchanger water-containing crude oil inlet, a heat exchanger water-containing crude oil outlet, a heat exchanger qualified crude oil inlet and a heat exchanger qualified crude oil outlet;
the separator assembly realizes three-phase separation of oil, gas and water and comprises a separator liquid inlet, a separator gas outlet, a separator oil outlet, a separator production water outlet and a separator gas inlet;
the dehydration device comprises a dehydration liquid inlet, a dehydration liquid outlet and a dehydration production water outlet;
the device comprises a heat exchanger, a water-containing crude oil inlet, a water-containing crude oil outlet, a dehydration inlet, a dehydration production water outlet, a gas treatment device, a dehydration inlet, a dehydration outlet, a heat exchanger, a production water remote control valve assembly, a water-containing crude oil outlet, a dehydration production water outlet and a dehydration production water remote control valve assembly, wherein the water-containing crude oil inlet of the heat exchanger is connected with the liquid inlet of the liquid inlet device;
the crude oil treatment remote control valve assembly is arranged between the dehydration liquid outlet and the qualified crude oil inlet of the heat exchanger, between the qualified crude oil outlet of the heat exchanger and the crude oil treatment device, and between the gas outlet of the separator and the gas treatment device, the gas treatment remote control valve assembly is arranged;
the remote replacement system comprises a water supply device, an unqualified crude oil tank, a first remote control valve and a second remote control valve, wherein the water supply device is connected with a water-containing crude oil inlet of the heat exchanger;
the nitrogen system comprises a nitrogen gas supply device and an air inlet remote control valve assembly, wherein the nitrogen gas supply device is connected with an air inlet of the separator, and the air inlet remote control valve assembly is arranged between the nitrogen gas supply device and the air inlet of the separator.
The FPSO remote displacement evacuation system in typhoon mode preferably comprises a primary separator and a secondary separator;
the primary separator comprises a primary separator liquid inlet, a primary separator gas outlet, a primary separator oil outlet, a primary separator produced water outlet and a primary separator gas inlet;
the secondary separator comprises a secondary separator heater, a secondary separator liquid inlet, a secondary separator gas outlet, a secondary separator oil outlet, a secondary separator produced water outlet and a secondary separator gas inlet;
the liquid inlet of the primary separator is connected with the water-containing crude oil outlet of the heat exchanger through the secondary separator heater, the oil outlet of the primary separator is connected with the liquid inlet of the secondary separator, the air inlet of the primary separator and the air inlet of the secondary separator are respectively connected with the nitrogen gas supply device, the air outlet of the primary separator and the air outlet of the secondary separator are respectively connected with the gas treatment device, the production water outlet of the primary separator and the production water outlet of the secondary separator are respectively connected with the production water treatment device, and the oil outlet of the secondary separator is connected with the dehydration inlet through the filter;
the gas treatment device comprises a gas treatment device and is characterized in that a gas inlet of a primary separator, a gas inlet of a secondary separator and a gas treatment device are respectively provided with a gas inlet remote control valve assembly, a gas outlet of the primary separator, a gas outlet of the secondary separator and the gas treatment device are respectively provided with a gas treatment remote control valve assembly, and a primary separator production water outlet, a secondary separator production water outlet and a production water treatment device are respectively provided with a production water remote control valve assembly.
The FPSO remote replacement evacuation system under typhoon mode, preferably, dewatering device includes booster pump and electric dehydrator, electric dehydrator is equipped with dehydration inlet the dehydration liquid outlet with dehydration production water outlet, the oil-out of second grade separator the filter the booster pump with the dehydration inlet links to each other in proper order, the dehydration liquid outlet with the qualified crude oil inlet of heat exchanger links to each other, the dehydration liquid outlet with be equipped with between the qualified crude oil inlet of heat exchanger crude oil treatment remote control valve subassembly, dehydration production water outlet with production water treatment device links to each other, dehydration production water outlet with be equipped with between the production water treatment device production water remote control valve subassembly.
Preferably, the production water remote control valve assembly comprises a third remote control valve, a fourth remote control valve and a fifth remote control valve, wherein the third remote control valve is arranged at the production water outlet of the primary separator, the fourth remote control valve is arranged at the production water outlet of the secondary separator, and the fifth remote control valve is arranged at the dewatering production water outlet.
The FPSO remote replacement emptying system in typhoon mode is characterized in that preferably, the crude oil treatment device comprises a cargo oil tank device and a crude oil flash evaporation device, the cargo oil tank device is connected with an oil outlet of the heat exchanger through an oil inlet pipeline, the crude oil flash evaporation device is connected with a dehydration liquid outlet, and the oil inlet pipeline and the dehydration liquid outlet are both provided with a crude oil treatment remote control valve assembly.
The FPSO remote replacement evacuation system in typhoon mode, preferably, the cargo oil tank device comprises a qualified crude oil cooler, a crude oil treatment filter and a cargo oil tank, wherein an oil inlet of the qualified crude oil cooler is connected with an oil outlet of the heat exchanger, and the oil inlet of the qualified crude oil cooler, the oil outlet of the qualified crude oil cooler and the oil inlet of the cargo oil tank are respectively provided with the crude oil treatment remote control valve component.
Preferably, the remote control valve assembly for crude oil treatment comprises a sixth remote control valve, a seventh remote control valve, an eighth remote control valve, a ninth remote control valve and a tenth remote control valve, wherein the sixth remote control valve is arranged at the dewatering liquid outlet, the seventh remote control valve is arranged at the oil inlet of the qualified crude oil cooler, the eighth remote control valve is arranged at the oil outlet of the qualified crude oil cooler, the ninth remote control valve and the tenth remote control valve are arranged at the oil outlet of the crude oil treatment filter, and the tenth remote control valve is arranged at the oil inlet of the cargo oil tank.
The FPSO remote replacement emptying system in typhoon mode is characterized in that preferably, the gas treatment device comprises a fuel gas treatment recovery system and a torch emptying system, a first-stage separator gas outlet is connected with the fuel gas treatment recovery system and the torch emptying system respectively, a second-stage separator gas outlet is connected with the torch emptying system, and the first-stage separator gas outlet, the fuel gas treatment recovery system, the first-stage separator gas outlet, the torch emptying system, the second-stage separator gas outlet and the torch emptying system are all provided with gas treatment remote control valve assemblies.
Preferably, the gas treatment remote control valve assembly comprises an eleventh remote control valve, a twelfth remote control valve and a thirteenth remote control valve, wherein the eleventh remote control valve is arranged between the gas outlet of the primary separator and the fuel gas treatment recovery system, the twelfth remote control valve is arranged between the gas outlet of the primary separator and the flare blow-down system, and the thirteenth remote control valve is arranged at the gas outlet of the secondary separator.
Preferably, the air inlet remote control valve assembly comprises a fourteenth remote control valve and a fifteenth remote control valve, wherein the fourteenth remote control valve is arranged between the outlet of the nitrogen gas supply device and the air inlet of the primary separator, and the fifteenth remote control valve is arranged between the outlet of the nitrogen gas supply device and the air inlet of the secondary separator.
The FPSO remote replacement draining method in the typhoon mode comprises a FPSO remote replacement draining system in the typhoon mode, and specifically comprises the following steps:
discharging crude oil in the crude oil processing system into the reject bin via the remote displacement system;
and discharging the production water in the crude oil treatment system into the production water treatment device through the nitrogen system.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention adopts various replacement processes and redundant replacement medium setting, and improves the switching and selecting reliability of the remote control process.
2. The valve in the replacement flow of the invention comprises a hydraulic valve which can be remotely operated, and the valve can be opened and closed by utilizing the pressure of the hydraulic accumulator under the working condition without a power source.
3. The invention reasonably utilizes the production water tank of the existing process system to complete replacement work and utilizes the nitrogen system to promote discharge.
4. The invention utilizes the pipelines of the third remote control valve, the fourth remote control valve and the fifth remote control valve which are positioned at the downstream of the first-stage separator, the second-stage separator and the electric dehydrator in the existing process flow, namely the bypass pipeline, and the newly added remote control valve realizes the replacement of the pipeline of the upper device of the FPSO under the power-losing working condition, thereby ensuring that the basic replacement operation can still be completed based on the pressure of the hydraulic valve accumulator under the condition of losing power source.
Drawings
FIG. 1 is a schematic diagram of a system according to the present invention.
In the figure:
1. a nitrogen gas supply device; 2. a water supply device; 3. a liquid inlet device; 4. a ball receiving and sending cylinder; 5. a single point rotary joint;
6. a first remote control valve; 7. a first filter; 8. a heat exchanger; 9. a third remote control valve;
10. a fourteenth remote control valve; 11. a primary separator; 12. a remote control valve; 13. an eleventh remote control valve;
14. a secondary separator heater; 15. a fifteenth remote control valve; 16. a fourth remote control valve;
17. a secondary separator; 18. a second filter; 19. a booster pump; 20. a normally closed valve; 21. a sixth remote control valve;
22. an electric dehydrator; 23. a fifth remote control valve; 24. a production water treatment device; 25. a crude oil flash unit;
26. a fuel gas treatment recovery system; 27. a flare blow-down system; 28. a seventh remote control valve;
29. a sixteenth remote control valve; 30. a qualified raw oil cooler; 31. an eighth remote control valve;
32. a crude oil treatment filter; 33. a ninth remote control valve; 34. a tenth remote control valve;
35. a second remote control valve; 36. a cargo oil tank; 37. unqualified crude oil tanks; 38. a thirteenth remote control valve;
39. a twelfth remote control valve; 41. a first control valve; 42. and a second control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", "tenth", "eleventh", "twelfth", "thirteenth", "fourteenth", "fifteenth", and "sixteenth", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed" and "provided" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention provides an FPSO remote replacement emptying system in typhoon mode. The invention comprises a crude oil treatment system, a remote replacement system and a nitrogen system;
the crude oil treatment system comprises a liquid inlet device, a heat exchanger, a separator assembly, a filter, a dehydration device, a gas treatment remote control valve assembly, a crude oil treatment device, a crude oil treatment remote control valve assembly, a production water treatment device and a production water remote control valve assembly;
the heat exchanger comprises a heat exchanger water-containing crude oil inlet, a heat exchanger water-containing crude oil outlet, a heat exchanger qualified crude oil inlet and a heat exchanger qualified crude oil outlet;
the separator assembly realizes three-phase separation of oil, gas and water and comprises a separator liquid inlet, a separator gas outlet, a separator oil outlet, a separator production water outlet and a separator gas inlet;
the dehydration device comprises a dehydration liquid inlet, a dehydration liquid outlet and a dehydration production water outlet;
the device comprises a heat exchanger, a water-containing crude oil inlet, a water-containing crude oil outlet, a dehydration inlet, a dehydration production water outlet, a gas treatment device, a dehydration inlet, a dehydration outlet, a heat exchanger, a production water remote control valve assembly, a water-containing crude oil outlet, a dehydration production water outlet and a dehydration production water remote control valve assembly, wherein the water-containing crude oil inlet of the heat exchanger is connected with the liquid inlet of the liquid inlet device;
the crude oil treatment remote control valve assembly is arranged between the dehydration liquid outlet and the qualified crude oil inlet of the heat exchanger, between the qualified crude oil outlet of the heat exchanger and the crude oil treatment device, and between the gas outlet of the separator and the gas treatment device, the gas treatment remote control valve assembly is arranged;
the remote replacement system comprises a water supply device, an unqualified crude oil tank, a first remote control valve and a second remote control valve, wherein the water supply device is connected with a water-containing crude oil inlet of the heat exchanger;
the nitrogen system comprises a nitrogen gas supply device and an air inlet remote control valve assembly, wherein the nitrogen gas supply device is connected with an air inlet of the separator, and the air inlet remote control valve assembly is arranged between the nitrogen gas supply device and the air inlet of the separator.
Referring to FIG. 1, a FPSO remote displacement evacuation system in typhoon mode includes a crude oil processing system, a remote displacement system, and a nitrogen system;
the crude oil treatment system comprises a liquid inlet device 3, a heat exchanger 8, a separator assembly, a first filter 7, a second filter 18, a dehydration device, a gas treatment remote control valve assembly, a crude oil treatment device, a crude oil treatment remote control valve assembly, a production water treatment device and a production water remote control valve assembly; the fluid in the liquid inlet device 3 is led from the platform submarine pipeline.
The production water treatment device is a production water tank, a production water tank pump is arranged in the production water tank, the production water in the production water tank is sent to the downstream to complete replacement by a booster pump 19, the production water tank pump has a remote control start-stop function, meanwhile, a hydraulic system hangs emergency electricity, and the functions of remote control of a valve of a process system and remote start-stop of the booster pump 19 in front of an electric dehydrator are realized.
The heat exchanger 8 comprises a heat exchanger water-containing crude oil inlet, a heat exchanger water-containing crude oil outlet, a heat exchanger qualified crude oil inlet and a heat exchanger qualified crude oil outlet;
the separator assembly realizes three-phase separation of oil, gas and water and comprises a separator liquid inlet, a separator gas outlet, a separator oil outlet, a separator production water outlet and a separator gas inlet;
the dehydration device comprises a dehydration liquid inlet, a dehydration liquid outlet and a dehydration production water outlet;
the water-containing crude oil inlet of the heat exchanger is connected with the liquid inlet device through a single-point rotary joint 5, the water-containing crude oil outlet of the heat exchanger is connected with the liquid inlet of the separator, the oil outlet of the separator is connected with the dehydration liquid inlet, a first filter 7 is arranged at the water-containing crude oil inlet of the heat exchanger, a second filter 18 is arranged at the dehydration liquid inlet, the gas outlet of the separator is connected with the gas treatment device, the oil outlet of the separator is connected with the dehydration liquid inlet, the dehydration liquid outlet is connected with the oil inlet of the heat exchanger, the oil outlet of the heat exchanger is connected with the crude oil treatment device, and the production water outlet of the separator and the dehydration production water outlet are respectively connected with the production water remote control valve component;
the crude oil treatment remote control valve assembly is arranged between the dehydration liquid outlet and the qualified crude oil inlet of the heat exchanger, between the qualified crude oil outlet of the heat exchanger and the crude oil treatment device, and between the gas outlet of the separator and the gas treatment device, the gas treatment remote control valve assembly is arranged;
the remote replacement system comprises a water supply device 2, a disqualified crude oil tank 37, a first remote control valve 6 and a second remote control valve 35, wherein the water supply device 2 is connected with the water-containing crude oil inlet of the heat exchanger, the water supply device 3 is provided with the first remote control valve 6 with the water-containing crude oil inlet of the heat exchanger, the oil outlet of the heat exchanger is connected with the disqualified crude oil tank 37, and the second remote control valve 35 is arranged at the oil inlet of the disqualified crude oil tank 37;
the nitrogen system comprises a nitrogen gas supply device 1 and an air inlet remote control valve assembly, wherein the nitrogen gas supply device 1 is connected with an air inlet of the separator, and the air inlet remote control valve assembly is arranged between the nitrogen gas supply device 1 and the air inlet of the separator. The nitrogen supply device 1 is a nitrogen storage tank.
Wherein the separator assembly comprises a primary separator 11 and a secondary separator 17; the primary separator 11 comprises a primary separator liquid inlet, a primary separator gas outlet, a primary separator oil outlet, a primary separator produced water outlet and a primary separator gas inlet;
the secondary separator 17 comprises a secondary separator liquid inlet, a secondary separator gas outlet, a secondary separator oil outlet, a secondary separator produced water outlet and a secondary separator gas inlet;
the primary separator liquid inlet is connected with the heat exchanger water-containing crude oil outlet, the primary separator oil outlet is connected with the secondary separator liquid inlet through a secondary separator heater 14, the primary separator air inlet and the secondary separator air inlet are respectively connected with a nitrogen gas supply device 1, the primary separator air outlet and the secondary separator air outlet are respectively connected with the gas treatment device, the primary separator production water outlet and the secondary separator production water outlet are respectively connected with a production water treatment device 24, and the secondary separator oil outlet is connected with the dehydration liquid inlet through a second filter 18;
the gas treatment device comprises a gas treatment device and is characterized in that a gas inlet remote control valve assembly is arranged between a gas inlet of the primary separator and a gas inlet of the secondary separator and a gas treatment device, a gas outlet of the primary separator and a gas outlet of the secondary separator and a gas treatment remote control valve assembly is arranged between the gas treatment device, and a production water outlet of the primary separator and a production water outlet of the secondary separator and a production water treatment device 24 are both provided with a production water remote control valve assembly.
The dewatering device comprises a booster pump 19 and an electric dewatering device 22, a normally closed valve 20 is arranged between the electric dewatering device 22 and a second control valve 42, the electric dewatering device 22 is provided with a dewatering liquid inlet, a dewatering liquid outlet and a dewatering production water outlet, an oil outlet of the secondary separator, a second filter 18, the booster pump 19 and the dewatering liquid inlet are sequentially connected, the dewatering liquid outlet is connected with a qualified crude oil inlet of the heat exchanger, a crude oil treatment remote control valve component is arranged between the dewatering liquid outlet and the qualified crude oil inlet of the heat exchanger, the dewatering production water outlet is connected with a production water treatment device 24, and a production water remote control valve component is arranged between the dewatering production water outlet and the production water treatment device 24.
With continued reference to fig. 1, the produced water remote control valve assembly includes a third remote control valve 9, a fourth remote control valve 16 and a fifth remote control valve 23, the third remote control valve 9 being disposed at the primary separator produced water outlet, the fourth remote control valve 16 being disposed at the secondary separator produced water outlet, the fifth remote control valve 23 being disposed at the dehydrated produced water outlet.
With continued reference to fig. 1, the crude oil processing apparatus includes a cargo oil tank device and a crude oil flash evaporation device 25, where the cargo oil tank device is connected to an oil outlet of the heat exchanger through an oil inlet pipeline, the crude oil flash evaporation device 25 is connected to the dewatering outlet, and the oil inlet pipeline and the dewatering outlet are both provided with the crude oil processing remote control valve assembly.
The oil inlet cabin device comprises a qualified crude oil cooler 30, a crude oil treatment filter 32 and an oil inlet cabin 36, wherein an oil inlet of the qualified crude oil cooler 30 is connected with an oil outlet of the heat exchanger 8, and the crude oil treatment remote control valve assemblies are arranged at the positions of the oil inlet of the qualified crude oil cooler 30, the oil outlet of the qualified crude oil cooler 30 and the oil inlet of the oil inlet cabin 36.
With continued reference to FIG. 1, the crude oil treatment remote control valve assembly includes a sixth remote control valve 21, a seventh remote control valve 28, an eighth remote control valve 31, a ninth remote control valve and 33 a tenth remote control valve 34, the sixth remote control valve 21 being disposed at the dewatering outlet, the seventh remote control valve 28 being disposed at the oil inlet of the qualified crude oil cooler 30, the eighth remote control valve 31 being disposed at the oil outlet of the qualified crude oil cooler 30, the ninth remote control valve 33 and the tenth remote control valve 34 being disposed at the oil outlet of the crude oil treatment filter 32, the tenth remote control valve 34 being disposed at the oil inlet of the cargo tank 36.
With continued reference to fig. 1, the oil inlet pipeline includes a first pipeline, a second pipeline and an oil outlet pipeline, the heat exchanger 8, the crude oil cooler 30 and the crude oil treatment filter 32 are connected through the first pipeline, a seventh remote control valve 28 is disposed at the oil inlet of the crude oil cooler 30, an eighth remote control valve 31 is disposed at the oil outlet of the qualified crude oil cooler 30, a second pipeline is further disposed between the heat exchanger 8 and the crude oil treatment filter 32, the oil inlet of the second pipeline is disposed at the front end of the seventh remote control valve 28, the oil outlet of the second pipeline is disposed at the rear end of the eighth remote control valve 31, and a sixteenth remote control valve 29 is disposed on the second pipeline, the oil outlets of the first pipeline and the second pipeline are connected through the oil outlet pipeline, the crude oil treatment filter 32 and the ninth remote control valve 33 are sequentially disposed on the oil outlet pipeline, a branch is disposed at the tail end of the oil outlet pipeline, one branch is connected with the cargo oil inlet tank 36, the tenth remote control valve 34 is disposed at the oil inlet of the cargo inlet tank 36, the other branch is connected with the unqualified crude oil tank 37, and the second remote control valve 35 is disposed at the unqualified oil tank 37.
With continued reference to fig. 1, the gas treatment device includes a fuel gas treatment recovery system 26 and a flare blow-down system 27, a first-stage separator gas outlet is respectively connected with the fuel gas treatment recovery system 26 and the flare blow-down system 27, a second-stage separator gas outlet is connected with the flare blow-down system 27, and the first-stage separator gas outlet and the fuel gas treatment recovery system 26, the first-stage separator gas outlet and the flare blow-down system 27, and the second-stage separator gas outlet and the flare blow-down system 27 are all provided with the gas treatment remote control valve assembly.
With continued reference to FIG. 1, the gas treatment remote control valve assembly includes an eleventh remote control valve 13, a twelfth remote control valve 39, and a thirteenth remote control valve 38, the eleventh remote control valve 13 being disposed between the gas outlet of the primary separator 11 and the fuel gas treatment recovery system 26, the twelfth remote control valve 39 being disposed between the gas outlet of the primary separator 11 and the flare blowdown system 27, the thirteenth remote control valve 38 being disposed at the gas outlet of the secondary separator 17.
With continued reference to fig. 1, the intake remote control valve assembly includes a fourteenth remote control valve 10 and a fifteenth remote control valve 15, the fourteenth remote control valve 10 being disposed between the outlet of the nitrogen gas supply device 1 and the primary separator intake port, the fifteenth remote control valve 15 being disposed between the outlet of the nitrogen gas supply device 1 and the secondary separator intake port.
The butterfly valves at the inlets of the left and right cabins of the process cabins are electric valves, and the valves can be remotely opened and closed, so that the switching of the production underwater cabins is realized. Ball valves of the left cabin and the right cabin of the air-float dirty oil to the process cabin are electric valves, and the valves can be remotely opened and closed to realize the switching of the dirty oil lower cabin. The left cabin outlet butterfly valve and the right cabin outlet butterfly valve of the process cabin are electric valves, and can be remotely opened and closed to prevent the material flow from flowing back to the left cabin under the working condition of treating the production water of the right cabin, and otherwise, to prevent the material flow from flowing back to the right cabin under the working condition of treating the production water of the left cabin.
The first remote control valve 6, the fifth remote control valve 23, the sixth remote control valve 21, the eleventh remote control valve 13, the twelfth remote control valve 39, the thirteenth remote control valve 38, the fourteenth remote control valve 10, and the fifteenth remote control valve 15 are all SDV valves.
The seventh remote control valve 28, the sixteenth remote control valve 29, the eighth remote control valve 31, the ninth remote control valve 33, the tenth remote control valve 34, and the second remote control valve 35 are hydraulic valves.
The remote control valve 12, the third remote control valve 9 and the fourth remote control valve 16 are all pneumatic valves.
The evacuation method of the FPSO remote replacement evacuation system in typhoon mode specifically comprises the following steps:
under normal process conditions, fluid from submarine pipelines of different platforms is filtered through a single-point rotary joint 5 through a water-containing crude oil inlet of the heat exchanger and then enters the heat exchanger 8 for heat exchange, then enters the primary separator 11 for oil, gas and water three-phase separation, the separated gas enters the fuel gas treatment system 26 through an eleventh remote control valve 13, the primary separator 11 is provided with a liquid level meter for measuring the liquid level in the primary separator 11, the first control valve 41 is controlled to be opened and closed according to the measured value of the liquid level meter, namely, when the liquid level of the primary separator 11 is too low, the first control valve 41 is closed, the gas quantity is discharged into the flare emptying system 27 through a twelfth remote control valve 39, after the heat medium furnace and other users are used after treatment, the separated liquid phase enters the secondary separator 17 for further dehydration after being heated by the secondary separator heater 14 to meet the inlet temperature of the secondary separator 17. The crude oil treated by the secondary separator 17 is filtered by the second filter 18, and then enters the electric dehydrator 22 for further dehydration by the booster pump 19. The secondary separator 17 is provided with a level gauge through which the liquid level is measured, whereby the opening and closing of the second control valve 42 is regulated in dependence of the liquid level, i.e. when the liquid level of the secondary separator 17 is too low, the second control valve 42 is opened.
After passing through the heat exchanger 8 and preliminary cooling, passing through the second pipeline, the seventh remote control valve 28 and entering the qualified crude oil cooler 30, passing through the crude oil cooler 30 and cooling to 70 ℃, entering the crude oil tank 36 through the crude oil treatment filter 32 for storage, and passing part of crude oil through the sixth remote control valve 21 and entering the crude oil flash evaporation device 25 for negative pressure flash evaporation, so that the flash point of the crude oil is improved, passing through the flash evaporation and entering the power station crude oil sedimentation tank for sedimentation, and the amount entering the crude oil flash evaporation device 25 is controlled by arranging a flowmeter. The gas exiting the secondary separator 17 then enters a flare blow down system 27. The produced water from the primary separator 11, the secondary separator 17 and the electric dehydrator 22 enters the produced water treatment device 24 to be discharged to the sea after being treated to be qualified. When production is shut down for a prolonged period of time, the oleaginous fluid within the process equipment is replaced with off-grade crude oil tank 37.
The replacement flow in typhoon mode is identical to the original design flow, but in order to ensure remote control replacement, the SDV valve in the remote replacement flow needs to be reset remotely, and the manual valve is transformed into a remote control valve. Taking the normal working condition of the main generator as an example, the replacement and evacuation flow in typhoon mode is described as follows:
in typhoon mode, personnel withdraw the platform, and normal production operation pauses, easily causes the jam risk to lead to the difficult production again in order to prevent that high congealing oil from storing in jar body for a long time. At this time, the first remote control valve 6 is opened by remote control, so that water from the sea pipe and the production water tank enters the tank of the primary separator 11 through the water supply device 2, the residual oil in the tank of the primary separator 11 is gradually replaced, the replaced oil-containing fluid sequentially enters the tank of the secondary separator 17, the booster pump 19 and the tank of the electric dehydrator 22, the seventh remote control valve 28, the eighth remote control valve 31 and the tenth remote control valve 34 are remotely closed, the sixteenth remote control valve 29, the ninth remote control valve 33 and the second remote control valve 35 are remotely opened, and the oil-containing fluid finally enters the reject raw oil tank 37 along the production line.
When the residual oil in the tank body is gradually replaced, at this time, the first remote control valve 6 and the sixth remote control valve 21 are remotely closed, the fourteenth remote control valve 10 and the fifteenth remote control valve 15 of the nitrogen system are remotely opened, the third remote control valve 9, the fourth remote control valve 16 and the fifth remote control valve 23 of the primary separator 11, the secondary separator 17 and the electric dehydrator 22 connected with the production water treatment device 24 are connected, and the discharged nitrogen gas promotes the replacement fluid in the tank bodies of the primary separator 11, the secondary separator 17 and the electric dehydrator 22 to be gradually discharged into the production water treatment device 24, so that the safety production accidents caused by the bumping and swaying of the tank bodies of the primary separator 11, the secondary separator 17 and the electric dehydrator 22 are prevented.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The FPSO remote replacement emptying system in typhoon mode is characterized by comprising a crude oil treatment system, a remote replacement system and a nitrogen system;
the crude oil treatment system comprises a liquid inlet device, a heat exchanger, a separator assembly, a filter, a dehydration device, a gas treatment remote control valve assembly, a crude oil treatment device, a crude oil treatment remote control valve assembly, a production water treatment device and a production water remote control valve assembly;
the heat exchanger comprises a heat exchanger water-containing crude oil inlet, a heat exchanger water-containing crude oil outlet, a heat exchanger qualified crude oil inlet and a heat exchanger qualified crude oil outlet;
the separator assembly realizes three-phase separation of oil, gas and water and comprises a separator liquid inlet, a separator gas outlet, a separator oil outlet, a separator production water outlet and a separator gas inlet;
the dehydration device comprises a dehydration liquid inlet, a dehydration liquid outlet and a dehydration production water outlet;
the device comprises a heat exchanger, a water-containing crude oil inlet, a water-containing crude oil outlet, a dehydration inlet, a dehydration production water outlet, a gas treatment device, a dehydration inlet, a dehydration outlet, a heat exchanger, a production water remote control valve assembly, a water-containing crude oil outlet, a dehydration production water outlet and a dehydration production water remote control valve assembly, wherein the water-containing crude oil inlet of the heat exchanger is connected with the liquid inlet of the liquid inlet device;
the crude oil treatment remote control valve assembly is arranged between the dehydration liquid outlet and the qualified crude oil inlet of the heat exchanger, between the qualified crude oil outlet of the heat exchanger and the crude oil treatment device, and between the gas outlet of the separator and the gas treatment device, the gas treatment remote control valve assembly is arranged;
the remote replacement system comprises a water supply device, an unqualified crude oil tank, a first remote control valve and a second remote control valve, wherein the water supply device is connected with a water-containing crude oil inlet of the heat exchanger;
the nitrogen system comprises a nitrogen gas supply device and an air inlet remote control valve assembly, wherein the nitrogen gas supply device is connected with an air inlet of the separator, and the air inlet remote control valve assembly is arranged between the nitrogen gas supply device and the air inlet of the separator.
2. The FPSO remote displacement evacuation system in typhoon mode according to claim 1, wherein the separator assembly comprises a primary separator and a secondary separator;
the primary separator comprises a primary separator liquid inlet, a primary separator gas outlet, a primary separator oil outlet, a primary separator produced water outlet and a primary separator gas inlet;
the secondary separator comprises a secondary separator heater, a secondary separator liquid inlet, a secondary separator gas outlet, a secondary separator oil outlet, a secondary separator produced water outlet and a secondary separator gas inlet;
the liquid inlet of the primary separator is connected with the water-containing crude oil outlet of the heat exchanger, the liquid outlet of the primary separator is connected with the liquid inlet of the secondary separator through the heater of the secondary separator, the air inlet of the primary separator and the air inlet of the secondary separator are respectively connected with the nitrogen gas supply device, the air outlet of the primary separator and the air outlet of the secondary separator are respectively connected with the gas treatment device, the production water outlet of the primary separator and the production water outlet of the secondary separator are respectively connected with the production water treatment device, and the oil outlet of the secondary separator is connected with the dehydration liquid inlet through the filter;
the gas treatment device comprises a gas treatment device and is characterized in that a gas inlet of a primary separator, a gas inlet of a secondary separator and a gas treatment device are respectively provided with a gas inlet remote control valve assembly, a gas outlet of the primary separator, a gas outlet of the secondary separator and the gas treatment device are respectively provided with a gas treatment remote control valve assembly, and a primary separator production water outlet, a secondary separator production water outlet and a production water treatment device are respectively provided with a production water remote control valve assembly.
3. The FPSO remote replacement evacuation system in typhoon mode according to claim 2, wherein the dehydration device comprises a booster pump and an electric dehydrator, the electric dehydrator is provided with a dehydration liquid inlet, a dehydration liquid outlet and a dehydration production water outlet, an oil outlet of the secondary separator, the filter, the booster pump and the dehydration liquid inlet are sequentially connected, the dehydration liquid outlet is connected with a qualified crude oil inlet of the heat exchanger, a crude oil treatment remote control valve assembly is arranged between the dehydration liquid outlet and the qualified crude oil inlet of the heat exchanger, the dehydration production water outlet is connected with the production water treatment device, and a production water remote control valve assembly is arranged between the dehydration production water outlet and the production water treatment device.
4. A FPSO remote displacement evacuation system in typhoon mode according to claim 3, wherein said production water remote control valve assembly comprises a third remote control valve disposed at said primary separator production water outlet, a fourth remote control valve disposed at said secondary separator production water outlet, and a fifth remote control valve disposed at said dehydrated production water outlet.
5. The FPSO remote displacement and evacuation system in typhoon mode according to claim 2, wherein the crude oil processing unit comprises a cargo oil tank unit and a crude oil flash evaporation unit, the cargo oil tank unit is connected with an oil outlet of the heat exchanger through an oil inlet pipeline, the crude oil flash evaporation unit is connected with the dehydration liquid outlet, and the crude oil processing remote control valve assemblies are arranged on the oil inlet pipeline and at the dehydration liquid outlet.
6. The FPSO remote displacement evacuation system in typhoon mode according to claim 5, wherein said cargo oil tank means comprises a qualified crude oil cooler, a crude oil treatment filter and a cargo oil tank, an oil inlet of said qualified crude oil cooler is connected to an oil outlet of said heat exchanger, and said crude oil treatment remote control valve assembly is provided at each of an oil inlet of said qualified crude oil cooler, an oil outlet of said qualified crude oil cooler and an oil inlet of said cargo oil tank.
7. The FPSO remote displacement drain system in typhoon mode according to claim 6, wherein said crude oil processing remote control valve assembly comprises a sixth remote control valve, a seventh remote control valve, an eighth remote control valve, a ninth remote control valve, and a tenth remote control valve, said sixth remote control valve being disposed at said dehydration outlet, said seventh remote control valve being disposed at an oil inlet of said qualified crude oil cooler, said eighth remote control valve being disposed at an oil outlet of said qualified crude oil cooler, said ninth remote control valve and said tenth remote control valve being disposed at an oil outlet of said crude oil processing filter, said tenth remote control valve being disposed at an oil inlet of said cargo inlet tank.
8. The FPSO remote displacement evacuation system in typhoon mode according to claim 2, wherein the gas treatment device comprises a fuel gas treatment recovery system and a flare evacuation system, the primary separator gas outlet is connected to the fuel gas treatment recovery system and the flare evacuation system, respectively, the secondary separator gas outlet is connected to the flare evacuation system, and the primary separator gas outlet and the fuel gas treatment recovery system, the primary separator gas outlet and the flare evacuation system and the secondary separator gas outlet and the flare evacuation system are each provided with the gas treatment remote control valve assembly.
9. The FPSO remote displacement purge system in typhoon mode according to claim 8, wherein said gas handling remote control valve assembly comprises an eleventh remote control valve disposed between said primary separator gas outlet and said fuel gas handling recovery system, a twelfth remote control valve disposed between said primary separator gas outlet and said flare stack, and a thirteenth remote control valve disposed at said secondary separator gas outlet;
the air inlet remote control valve assembly comprises a fourteenth remote control valve and a fifteenth remote control valve, the fourteenth remote control valve is arranged between the outlet of the nitrogen gas supply device and the air inlet of the primary separator, and the fifteenth remote control valve is arranged between the outlet of the nitrogen gas supply device and the air inlet of the secondary separator.
10. A method for remote replacement and evacuation of an FPSO in typhoon mode, comprising the following steps by using the FPSO remote replacement and evacuation system in typhoon mode according to any one of claims 1 to 9:
discharging crude oil in the crude oil processing system into the reject bin via the remote displacement system;
and discharging the production water in the crude oil treatment system into the production water treatment device through the nitrogen system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310669035.3A CN116677923A (en) | 2023-06-07 | 2023-06-07 | FPSO remote replacement emptying system and method in typhoon mode |
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| CN202310669035.3A CN116677923A (en) | 2023-06-07 | 2023-06-07 | FPSO remote replacement emptying system and method in typhoon mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117608201A (en) * | 2024-01-24 | 2024-02-27 | 中海油能源发展股份有限公司采油服务分公司 | Intelligent optimization controller, system and control method for FPSO primary separator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117608201A (en) * | 2024-01-24 | 2024-02-27 | 中海油能源发展股份有限公司采油服务分公司 | Intelligent optimization controller, system and control method for FPSO primary separator |
| CN117608201B (en) * | 2024-01-24 | 2024-03-29 | 中海油能源发展股份有限公司采油服务分公司 | Intelligent optimization controller, system and control method for FPSO primary separator |
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