CN110657348B - Oil transportation system and method for realizing switching between self-pressure and pump output in SAGD mode - Google Patents
Oil transportation system and method for realizing switching between self-pressure and pump output in SAGD mode Download PDFInfo
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- CN110657348B CN110657348B CN201910822331.6A CN201910822331A CN110657348B CN 110657348 B CN110657348 B CN 110657348B CN 201910822331 A CN201910822331 A CN 201910822331A CN 110657348 B CN110657348 B CN 110657348B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 155
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000007547 defect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
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- 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
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- 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
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- 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
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Abstract
The invention discloses an oil transportation system and method for realizing switching between self pressure and pump output in an SAGD mode. The oil transportation system for realizing the switching between the self-pressure and the pump output in the SAGD mode comprises a buffer tank, an output pump, an output flow meter and a heat exchanger; wherein the liquid inlet of the buffer tank is communicated with an oil production pipeline; the liquid inlet of the external delivery pump is communicated with the liquid outlet of the buffer tank through a first pipeline, and the liquid outlet of the external delivery pump is communicated with the liquid inlet of the external delivery flowmeter through a second pipeline; the liquid outlet of the outward flow meter is communicated with an outward pipeline; the liquid inlet of the heat exchanger is communicated with the second pipeline through a third pipeline, and the liquid outlet of the heat exchanger is communicated with the oil production pipeline through a fourth pipeline; the liquid outlet of the heat exchanger is communicated with an external pipeline through a fifth pipeline; the fifth pipeline is provided with a first valve. The invention also provides an oil transportation method for realizing switching between self pressure and pump output in the SAGD mode. The invention solves the defects of the original oil transportation process and realizes the self-pressure oil transportation between natural stations and combined stations.
Description
Technical Field
The invention relates to the technical field of SAGD oil extraction ground gathering and transportation. More particularly, the invention relates to an oil transportation system and method for realizing switching between self pressure and pump output in an SAGD mode.
Background
The Steam Assisted Gravity Drainage (SAGD) technology. The SAGD technology is successfully applied to Liaohe oil fields, Xinjiang oil fields and the like in China. With the deep development of the SAGD, the development effect is continuously improved, and the ground gathering and transportation system is correspondingly changed in a series.
Taking an example of an eosin oil field SAGD1 transfer station of Liaohe in China, the station entering pressure is gradually increased from 1.0 MPa in 2008 to 1.5 MPa at the end of 2017, the station entering temperature is increased from the original 110 ℃ to 170 ℃, the output capacity is increased from the initial 1000 tons/day to 4000 tons/day, and the associated gas amount is increased from the initial 1000 squares/day to 8000 squares/day; however, although the transfer station adopts a relatively advanced closed gathering and transferring mode, the automation degree is relatively high, as for the oil transferring part, an oil transferring process of uninterrupted 24 hours by an external transfer pump is still adopted, and as the transferring medium is high-temperature and high-pressure mixed liquid and contains hydrogen sulfide, the problems of high energy consumption, serious equipment corrosion, multiple potential safety hazards, harsh working environment and the like exist in the daily operation process.
Therefore, the invention provides an oil transportation system and method for realizing switching between self pressure and pump output in an SAGD mode, so as to solve the problems.
Disclosure of Invention
The invention aims to provide an oil transportation system for realizing switching between self pressure and pump output in an SAGD mode; the system solves the defects of the original traditional oil transportation process, utilizes the pressure of the front section of the system, controls the pressure of the electromagnetic valve above the buffer tank to ensure that the gas cap pressure is greater than the saturation pressure at the corresponding temperature, forms a pressure difference of more than 0.1-0.12 MPa with the external transportation dry pressure, and realizes the natural station-combined station self-pressure oil transportation by simply modifying the flow in the station and stopping the external transportation pump.
The invention also aims to provide a method for realizing the oil transportation system with switching between the self-pressure and the pump output in the SAGD mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil transportation system for realizing switching between self-pressure and pump output in an SAGD mode comprises a buffer tank, an output pump, an output flow meter and a heat exchanger; wherein,
the liquid inlet of the buffer tank is communicated with an oil production pipeline;
a liquid inlet of the external conveying pump is communicated with a liquid outlet of the buffer tank through a first pipeline, and a liquid outlet of the external conveying pump is communicated with a liquid inlet of the external conveying flowmeter through a second pipeline;
the liquid outlet of the output flow meter is communicated with an output pipeline;
the liquid inlet of the heat exchanger is communicated with the second pipeline through a third pipeline, and the liquid outlet of the heat exchanger is communicated with the oil production pipeline through a fourth pipeline;
a liquid outlet of the heat exchanger is communicated with an external pipeline through a fifth pipeline;
and a first valve is arranged on the fifth pipeline.
Preferably, one end of the oil production line, which is close to the liquid inlet of the buffer tank, is provided with a second valve.
Preferably, a third valve is arranged at one end, close to the liquid outlet of the buffer tank, of the first pipeline, and a fourth valve is arranged at one end, close to the liquid inlet of the outward conveying pump, of the first pipeline.
Preferably, a fifth valve is arranged at one end of the second pipeline close to the liquid outlet of the outward conveying pump, and a sixth valve is arranged at one end of the second pipeline close to the liquid inlet of the outward conveying flow meter.
Preferably, a seventh valve is arranged at one end, close to the second pipeline, of the third pipeline, and an eighth valve is arranged at one end, close to the liquid inlet of the heat exchanger, of the third pipeline.
Preferably, a ninth valve is arranged at one end of the fourth pipeline close to the liquid outlet of the heat exchanger, and a tenth valve is arranged at one end of the fourth pipeline close to the oil production pipeline; wherein the ninth valve is located between the heat exchanger and the intersection of the fourth line and the fifth line.
Preferably, an eleventh valve is arranged at one end of the outgoing line close to the liquid outlet of the outgoing flow meter.
The invention also provides an oil transportation method for realizing switching between self pressure and pump output in an SAGD mode by using the system, which comprises the following steps:
when the system is used for self-pressure oil transportation, liquid entering the station enters the buffer tank through the oil production pipeline, the gas cap pressure of the buffer tank is kept to be 0.8-0.9MPa, the liquid enters the outward transportation pump through the first pipeline from the buffer tank, the outward transportation pump is closed, the liquid enters the outward transportation flowmeter through a bypass of the outward transportation pump, and the liquid enters the combined station through the outward transportation pipeline from the outward transportation flowmeter; when the self-pressure oil transportation needs heating, part of liquid output by the outward transportation pump enters the outward transportation flowmeter through the second pipeline, part of the liquid enters the heat exchanger through the third pipeline for heat exchange, the first valve is opened, the liquid output by the heat exchanger enters the fifth pipeline and is converged with the liquid output by the outward transportation flowmeter through the first valve, and the converged liquid enters the joint station through the outward transportation pipeline;
when the system is used for pump conveying, the liquid entering the station enters the buffer tank through the oil production pipeline, enters the outward conveying pump from the buffer tank through the first pipeline, starts the outward conveying pump, and the liquid output by the outward conveying pump enters the outward conveying flowmeter through the second pipeline and enters the combined station through the outward conveying pipeline; when the pump needs heating, part of the liquid output by the outward conveying pump enters the outward conveying flowmeter through the second pipeline, part of the liquid enters the heat exchanger through the third pipeline for heat exchange, the liquid output by the outward conveying flowmeter enters the combined station through the outward conveying pipeline, and the liquid output by the heat exchanger enters the oil production pipeline through the fourth pipeline.
Preferably, when the system is used for self-pressure oil transportation, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the eleventh valve are opened, the seventh valve is closed, the incoming liquid enters the buffer tank through the oil production pipeline, the gas cap pressure of the buffer tank is kept to be 0.8-0.9MPa, the incoming liquid enters the outward delivery pump through the first pipeline through the buffer tank, the outward delivery pump is in a closed state, the incoming liquid enters the outward delivery flowmeter through the bypass of the outward delivery pump through the second pipeline, and the outgoing liquid enters the combined station through the outward delivery pipeline; when heating is needed, the first valve, the seventh valve, the eighth valve and the ninth valve are opened, the tenth valve is closed, part of liquid output by the outward conveying pump enters the outward conveying flowmeter through the second pipeline, part of liquid enters the heat exchanger through the third pipeline for heat exchange, the liquid output by the heat exchanger enters the fifth pipeline and is converged with the liquid output by the outward conveying flowmeter through the first valve, and the converged liquid enters the combined station through the outward conveying pipeline.
Preferably, when the system is used for pump output, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the eleventh valve are opened, the seventh valve is closed, the incoming liquid enters the buffer tank through the oil production pipeline, enters the outward delivery pump through the first pipeline from the buffer tank, the outward delivery pump is in an open state, the liquid output by the outward delivery pump enters the outward delivery flowmeter through the second pipeline, and enters the combined station through the outward delivery flowmeter and the outward delivery pipeline; when heating is needed, the seventh valve, the eighth valve, the ninth valve and the tenth valve are opened, the first valve is closed, part of liquid output by the outward delivery pump enters the outward delivery flowmeter through the second pipeline, part of liquid enters the heat exchanger through the third pipeline for heat exchange, liquid output by the outward delivery flowmeter enters the combined station through the outward delivery pipeline, and liquid output by the heat exchanger enters the oil production pipeline through the fourth pipeline.
The invention has the following beneficial effects:
the oil transportation system for realizing the switching of the self-pressure and the pump output in the SAGD mode moves the outlet of the heat exchanger to an external transportation pipeline, and simultaneously turns a set of flow gates for cold transportation one by utilizing the characteristic that the pressure of a buffer tank system in a station is higher than the pressure of the external transportation pipeline, so that the method for realizing the self-pressure oil transportation by utilizing the gas cap pressure of the buffer tank is realized, and the external transportation pump is stopped at the moment to realize the self-pressure oil transportation; in addition, the system can realize free switching of self-pressure oil transportation and pump transportation without disassembling an external transportation pump, thereby greatly saving manpower and material resources;
the oil transportation method for realizing the switching between the self-pressure and the pump output in the SAGD mode fully utilizes the advantages of high temperature and high pressure of the produced liquid at the front section in the SAGD mode, realizes the self-pressure oil transportation between the oil production station and the combined station by reasonable process transformation and combination of necessary parameter control, and directly saves the cost by more than 100 ten thousand yuan per year by calculating the liquid amount per day of 4000 square meters of daily transportation, meanwhile, the potential safety hazard and the environmental protection hazard are greatly reduced, and the labor intensity of workers and the working environment are greatly improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an oil transportation system for realizing switching between self pressure and pump output in an SAGD mode;
the system comprises a buffer tank 1, a 2-outward delivery pump, a 3-outward delivery flowmeter, a 4-heat exchanger, a 5-oil production line, a 6-first line, a 7-second line, a 8-outward delivery line, a 9-third line, a 10-fourth line, a 11-fifth line, a 12-first valve, a 13-second valve, a 14-third valve, a 15-fourth valve, a 16-fifth valve, a 17-sixth valve, a 18-seventh valve, a 19-eighth valve, a 20-ninth valve, a 21-tenth valve and a 22-eleventh valve.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the prior art, a valve is usually installed in front of an external delivery flowmeter to serve as an inlet of a heat exchanger, the valve flows back to a buffer tank after heat exchange is completed in the heat exchanger, the device requires that the pressure in front of the valve is higher than the pressure in the buffer tank, so that the flow of a heat source in the heat exchanger is realized, and a method for realizing the condition is to start an external delivery pump.
Specifically, with reference to fig. 1, an oil transportation system for realizing switching between self-pressure and pump output in an SAGD manner includes a buffer tank 1, an output pump 2, an output flow meter 3, and a heat exchanger 4; wherein,
a liquid inlet of the buffer tank 1 is communicated with an oil production line 5;
a liquid inlet of the external conveying pump 2 is communicated with a liquid outlet of the buffer tank 1 through a first pipeline 6, and a liquid outlet of the external conveying pump 2 is communicated with a liquid inlet of the external conveying flow meter 3 through a second pipeline 7;
the liquid outlet of the output flowmeter 3 is communicated with an output pipeline 8;
a liquid inlet of the heat exchanger 4 is communicated with a second pipeline 7 through a third pipeline 9, and a liquid outlet of the heat exchanger 4 is communicated with the oil production pipeline 5 through a fourth pipeline 10;
a liquid outlet of the heat exchanger 4 is communicated with an external pipeline 8 through a fifth pipeline 11;
a first valve 12 is arranged on the fifth pipeline 11.
As a preferred embodiment of the present invention, a second valve 13 is provided at one end of the oil production line 5 near the liquid inlet of the buffer tank 1.
As a preferred embodiment of the present invention, a third valve 14 is disposed at an end of the first pipeline 6 close to the liquid outlet of the buffer tank 1, and a fourth valve 15 is disposed at an end of the first pipeline 6 close to the liquid inlet of the outward-conveying pump 2.
As a preferred embodiment of the present invention, a fifth valve 16 is disposed at an end of the second pipeline 7 close to the liquid outlet of the external flow pump 2, and a sixth valve 17 is disposed at an end of the second pipeline 7 close to the liquid inlet of the external flow meter 3.
In a preferred embodiment of the present invention, a seventh valve 18 is disposed at one end of the third pipeline 9 close to the second pipeline 7, and an eighth valve 19 is disposed at one end of the third pipeline 9 close to the liquid inlet of the heat exchanger 4.
As a preferred embodiment of the present invention, a ninth valve 20 is disposed at an end of the fourth line 10 close to the liquid outlet of the heat exchanger 4, and a tenth valve 21 is disposed at an end of the fourth line 10 close to the oil production line 5; wherein the ninth valve 20 is located between the intersection of the fourth line 10 and the fifth line 11 and the heat exchanger 4.
As a preferred embodiment of the present invention, an eleventh valve 22 is disposed at an end of the outgoing line 8 close to the liquid outlet of the outgoing flow meter 3.
The invention also provides an oil transportation method for realizing the switching between the self-pressure mode and the pump output mode in the SAGD mode by using the system, and meanwhile, the free switching between the self-pressure mode and the pump output mode can be realized. The method of the invention comprises two aspects, namely, a self-pressure oil transportation method under a normal state; and the second is to stop the self-pressure oil transportation and recover the pump output (start the outward transportation pump) flow due to other external reasons. Thereby ensuring that the natural station can realize the output function under any condition; the method specifically comprises the following steps:
when the system is used for self-pressure oil transportation, liquid entering the station enters the buffer tank 1 through the oil production pipeline 5, the gas cap pressure of the buffer tank 1 is kept to be 0.8-0.9MPa, the liquid enters the outward transportation pump 2 from the buffer tank 1 through the first pipeline 6, the outward transportation pump 2 is closed, the liquid output by the buffer tank 1 enters the outward transportation flowmeter 3 through the bypass of the outward transportation pump 2 through the second pipeline 7, and the liquid enters the combined station through the outward transportation flowmeter 3 through the outward transportation pipeline 8; when the self-pressure oil transportation needs heating, part of liquid output by the external transportation pump 2 enters the external transportation flow meter 3 through the second pipeline 7, part of the liquid enters the heat exchanger 4 through the third pipeline 9 for heat exchange, the first valve 12 is opened, the liquid output by the heat exchanger 4 enters the fifth pipeline 11 and is converged with the liquid output by the external transportation flow meter 3 through the first valve 12, and the converged liquid enters the joint station through the external transportation pipeline 8;
when the system is used for pump conveying, the liquid entering the station enters the buffer tank 1 through the oil production pipeline 5, enters the outward conveying pump 2 through the first pipeline 6 from the buffer tank 1, starts the outward conveying pump 2, enters the outward conveying flowmeter 3 through the second pipeline 7 from the outward conveying pump 2, and enters the combined station through the outward conveying pipeline 8 from the outward conveying flowmeter 3; when the pump needs heating, part of the liquid output by the outward conveying pump 2 enters the outward conveying flowmeter 3 through the second pipeline 7, part of the liquid enters the heat exchanger 4 through the third pipeline 9 for heat exchange, the liquid output by the outward conveying flowmeter 3 enters the combined station through the outward conveying pipeline 8, and the liquid output by the heat exchanger 4 enters the oil production pipeline 5 through the fourth pipeline 10.
As a preferred embodiment of the invention, when the system is used for self-pressure oil transportation, the second valve 13, the third valve 14, the fourth valve 15, the fifth valve 16, the sixth valve 17 and the eleventh valve 22 are opened, the seventh valve 18 is closed, the incoming liquid enters the buffer tank 1 through the oil production line 5, the gas cap pressure of the buffer tank 1 is kept to be 0.8-0.9MPa, the incoming liquid enters the outward transportation pump 2 through the first pipeline 6 from the buffer tank 1, the outward transportation pump 2 is in a closed state, the incoming liquid enters the outward transportation flow meter 3 through the second pipeline 7 by-pass of the outward transportation pump 2, and the outgoing flow meter 3 enters the combination station through the outward transportation line 8; when heating is needed, the first valve 12, the seventh valve 18, the eighth valve 19 and the ninth valve 20 are opened, the tenth valve 21 is closed, part of liquid output by the bypass of the external transmission pump 2 enters the external transmission flow meter 3 through the second pipeline 7, part of liquid enters the heat exchanger 4 through the third pipeline 9 for heat exchange, the liquid output by the heat exchanger 4 enters the fifth pipeline 11 and is converged with the liquid output by the external transmission flow meter 3 through the first valve 12, and the converged liquid enters the combined station through the external transmission pipeline 8.
As a preferred embodiment of the present invention, when the system is used for pump delivery, the second valve 13, the third valve 14, the fourth valve 15, the fifth valve 16, the sixth valve 17 and the eleventh valve 22 are opened, the seventh valve 18 is closed, the inbound liquid enters the buffer tank 1 through the oil production line 5, enters the outbound pump 2 through the first line 6 from the buffer tank 1, the outbound pump 2 is in an open state, enters the outbound flow meter 3 through the second line 7 from the outbound pump 2, and enters the combination station through the outbound flow meter 8 from the outbound flow meter 3; when heating is needed, the seventh valve 18, the eighth valve 19, the ninth valve 20 and the tenth valve 21 are opened, the first valve 12 is closed, part of the liquid output by the outward-conveying pump 2 enters the outward-conveying flow meter 3 through the second pipeline 7, part of the liquid enters the heat exchanger 4 through the third pipeline 9 for heat exchange, the liquid output by the outward-conveying flow meter 3 enters the combined station through the outward-conveying pipeline 8, and the liquid output by the heat exchanger 4 enters the oil production pipeline 5 through the fourth pipeline 10.
In short, the self-pressure oil transportation can be realized through the graph 1, and the conventional pumping oil transportation can also be realized through the flow switching. The smooth completion of all-weather export tasks is ensured.
The method is used for self-pressure oil transportation of a certain oil production plant, and specifically comprises the following steps:
opening a second valve 13, a third valve 14, a fourth valve 15, a fifth valve 16, a sixth valve 17 and an eleventh valve 22, closing a seventh valve 18, after the produced liquid of the inbound oil well enters the buffer tank 1 through the oil production pipeline 5, maintaining the pressure of the gas cap of the buffer tank 1 at 0.8-0.9MPa, entering the outbound pump 2 through the first pipeline 6 from the buffer tank 1, entering the outbound flowmeter 3 through the second pipeline 7 by a bypass of the outbound pump 2 (at the moment, the outbound pump is in a stop state), and entering the combined station through the outbound pipeline 8 from the outbound flowmeter 3, thereby completely realizing unpowered autogenous pressure oil transportation on the station; the station-entering temperature is 175 ℃, the station-entering pressure is 0.9Mpa, the daily treatment mixed gas is 9000-;
when the heat exchanger process is started during heating in winter, the first valve 12, the seventh valve 18, the eighth valve 19 and the ninth valve 20 are opened, the tenth valve 21 is closed, part of liquid output by the outward conveying pump 2 enters the outward conveying flowmeter 3 through the second pipeline 7, part of liquid enters the heat exchanger 4 through the third pipeline 9 for heat exchange, liquid output by the heat exchanger 4 enters the fifth pipeline 11 and is converged with liquid output by the outward conveying flowmeter 3 through the first valve 12, and the converged liquid enters the combined station through the outward conveying pipeline 8.
After more than one year of operation, the external delivery pumps on the station are completely stopped no matter in winter or summer, and the feasibility of natural station-united station self-pressure oil delivery under the SAGD development mode is fully demonstrated. The electricity, water, maintenance and material costs are saved by 100 ten thousand yuan after the calculation. The method of the invention not only saves the cost, but also obviously improves the labor intensity of workers and the working environment, and is certainly determined by the first-line workers.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (9)
1. An oil transportation method for realizing switching between self pressure and pump output in an SAGD mode is characterized in that an oil transportation system for realizing switching between self pressure and pump output in an SAGD mode is used in the method, and the method comprises the following steps: when the device is used for self-pressure oil transportation, liquid entering the station enters a buffer tank through an oil production pipeline, the gas cap pressure of the buffer tank is kept at 0.8-0.9MPa, the liquid enters an outward transportation pump through a first pipeline from the buffer tank, the outward transportation pump is closed, the liquid enters an outward transportation flowmeter through a bypass of the outward transportation pump, and the liquid enters a combined station through the outward transportation pipeline from the outward transportation flowmeter; when the self-pressure oil transportation needs heating, part of liquid output by the outward transportation pump enters the outward transportation flowmeter through the second pipeline, part of the liquid enters the heat exchanger through the third pipeline for heat exchange, the first valve is opened, the liquid output by the heat exchanger enters the fifth pipeline and is converged with the liquid output by the outward transportation flowmeter through the first valve, and the converged liquid enters the joint station through the outward transportation pipeline;
when the liquid is used for pump conveying, the liquid entering the station enters the buffer tank through the oil production pipeline, enters the outward conveying pump from the buffer tank through the first pipeline, starts the outward conveying pump, and the liquid output by the outward conveying pump enters the outward conveying flowmeter through the second pipeline and enters the combined station through the outward conveying pipeline; when the pump is in heating demand, part of liquid output by the outward-conveying pump enters the outward-conveying flow meter through a second pipeline, part of the liquid enters the heat exchanger through a third pipeline for heat exchange, the liquid output by the outward-conveying flow meter enters the combined station through the outward-conveying pipeline, and the liquid output by the heat exchanger enters the oil production pipeline through a fourth pipeline;
the oil transportation system for realizing the switching between the self-pressure and the pump output in the SAGD mode comprises a buffer tank, an output pump, an output flow meter and a heat exchanger; wherein,
the liquid inlet of the buffer tank is communicated with an oil production pipeline;
a liquid inlet of the external conveying pump is communicated with a liquid outlet of the buffer tank through a first pipeline, and a liquid outlet of the external conveying pump is communicated with a liquid inlet of the external conveying flowmeter through a second pipeline;
the liquid outlet of the output flow meter is communicated with an output pipeline;
the liquid inlet of the heat exchanger is communicated with the second pipeline through a third pipeline, and the liquid outlet of the heat exchanger is communicated with the oil production pipeline through a fourth pipeline;
a liquid outlet of the heat exchanger is communicated with an external pipeline through a fifth pipeline;
and a first valve is arranged on the fifth pipeline.
2. The method of claim 1, wherein the production line is provided with a second valve at an end thereof proximate to the liquid inlet of the surge tank.
3. The method of claim 1, wherein the first line is provided with a third valve at an end thereof adjacent to the liquid outlet of the buffer tank, and a fourth valve at an end thereof adjacent to the liquid inlet of the outward-conveying pump.
4. The method of claim 1, wherein the second line has a fifth valve at an end thereof adjacent to the outlet of the outward flow pump and a sixth valve at an end thereof adjacent to the inlet of the outward flow meter.
5. The method according to claim 1, characterized in that the third line is provided with a seventh valve at its end close to the second line and with an eighth valve at its end close to the liquid inlet of the heat exchanger.
6. The method of claim 1, wherein a ninth valve is provided at an end of the fourth line near the liquid outlet of the heat exchanger, and a tenth valve is provided at an end of the fourth line near the oil production line.
7. The method of claim 1, wherein an eleventh valve is provided at an end of the outgoing line proximate to the outlet of the outgoing flow meter.
8. The method according to any one of claims 1 to 7, wherein when the method is used for self-pressure oil transportation, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the eleventh valve are opened, the seventh valve is closed, the incoming liquid enters the buffer tank through the oil production pipeline, the gas cap pressure of the buffer tank is kept to be 0.8-0.9MPa, the incoming liquid enters the outward transportation pump through the first pipeline from the buffer tank, the outward transportation pump is in a closed state, the incoming liquid enters the outward transportation flow meter through the bypass of the outward transportation pump through the second pipeline, and the outgoing liquid enters the combination station through the outward transportation pipeline from the outward transportation flow meter; when heating is needed, the first valve, the seventh valve, the eighth valve and the ninth valve are opened, the tenth valve is closed, part of liquid output by the outward conveying pump enters the outward conveying flowmeter through the second pipeline, part of liquid enters the heat exchanger through the third pipeline for heat exchange, the liquid output by the heat exchanger enters the fifth pipeline and is converged with the liquid output by the outward conveying flowmeter through the first valve, and the converged liquid enters the combined station through the outward conveying pipeline.
9. The method according to any one of claims 1 to 7, wherein when used for pump delivery, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the eleventh valve are opened, the seventh valve is closed, incoming liquid enters the buffer tank through the oil production line, the outgoing liquid enters the outgoing pump through the first line from the buffer tank, the outgoing pump is in an open state, and liquid output by the outgoing pump enters the outgoing flow meter through the second line and enters the combination station through the outgoing flow meter through the outgoing line; when heating is needed, the seventh valve, the eighth valve, the ninth valve and the tenth valve are opened, the first valve is closed, part of liquid output by the outward delivery pump enters the outward delivery flowmeter through the second pipeline, part of liquid enters the heat exchanger through the third pipeline for heat exchange, liquid output by the outward delivery flowmeter enters the combined station through the outward delivery pipeline, and liquid output by the heat exchanger enters the oil production pipeline through the fourth pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822331.6A CN110657348B (en) | 2019-09-02 | 2019-09-02 | Oil transportation system and method for realizing switching between self-pressure and pump output in SAGD mode |
Applications Claiming Priority (1)
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|---|---|---|---|---|
| CN106014368A (en) * | 2016-06-27 | 2016-10-12 | 新疆石油工程设计有限公司 | SAGD (steam assisted gravity drainage) high-temperature closed gathering and transportation device for shallow super heavy oil and method adopting SAGD high-temperature closed gathering and transportation device |
| CN206554905U (en) * | 2017-02-13 | 2017-10-13 | 中国石油天然气股份有限公司 | Output liquid metering and waste heat utilization system of SAGD high temperature high-yield well |
| CN108753349A (en) * | 2018-06-07 | 2018-11-06 | 中国石油天然气集团公司 | High-temperature closed dehydration device and the method for handling SAGD Produced Liquids |
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| CN106014368A (en) * | 2016-06-27 | 2016-10-12 | 新疆石油工程设计有限公司 | SAGD (steam assisted gravity drainage) high-temperature closed gathering and transportation device for shallow super heavy oil and method adopting SAGD high-temperature closed gathering and transportation device |
| CN206554905U (en) * | 2017-02-13 | 2017-10-13 | 中国石油天然气股份有限公司 | Output liquid metering and waste heat utilization system of SAGD high temperature high-yield well |
| CN108753349A (en) * | 2018-06-07 | 2018-11-06 | 中国石油天然气集团公司 | High-temperature closed dehydration device and the method for handling SAGD Produced Liquids |
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