CN110513598B - Oil well field associated gas closed pressurization gathering and transportation system and use method thereof - Google Patents
Oil well field associated gas closed pressurization gathering and transportation system and use method thereof Download PDFInfo
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- CN110513598B CN110513598B CN201910720984.3A CN201910720984A CN110513598B CN 110513598 B CN110513598 B CN 110513598B CN 201910720984 A CN201910720984 A CN 201910720984A CN 110513598 B CN110513598 B CN 110513598B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
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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
- F17D1/02—Pipe-line systems for gases or vapours
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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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- 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
- F17D3/145—Arrangements for supervising or controlling working operations for eliminating water in gas pipelines
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a closed pressurization gathering and transportation system of oil well field associated gas and a using method thereof, oil gas mixture enters a well group collecting pipe, then enters a buffer tank and a gas-liquid separator for carrying out primary filtration and gas-liquid separation on liquid components in the associated gas, the associated gas in the separated gas-liquid separator enters a closed pressurization gathering and transportation device, the associated gas processed by the closed pressurization gathering and transportation device is input into an output pipeline, wherein the liquid separated in the gas-liquid separator and the closed pressurization gathering and transportation device enters the output pipeline through the pipeline, the closed pressurization gathering and transportation system of the associated gas is used for realizing all closed gathering and transportation of the associated gas in the ground recovery technology of the associated gas in the oil field, meanwhile, in the closed pressurization processing process of the associated gas, the problems of diaphragm rupture and valve seat failure of a diaphragm compressor in the process of compressing the associated gas are avoided because the front end carries out multiple times of filtration and gas-liquid separation on the associated gas in the oil field, the reliability of the closed gathering and transportation system is higher.
Description
Technical Field
The invention relates to the technical field of oilfield associated gas recovery, in particular to a closed pressurization gathering and transportation system for oilfield well site associated gas and a using method thereof.
Background
At present, the ground recovery technology of the associated gas of the oil field in China mainly adopts a wellhead constant pressure valve for gas collection and mixed transportation, a booster station for oil gas mixed transportation, a gathering and transportation station for light hydrocarbon recovery and the like. However, the gas carrying effect of the oil-gas mixed transportation pump is poor due to unstable oil and gas amount of the booster station, and the complete airtight gathering and transportation of the associated gas cannot be realized, so that the mixed transportation of the pressurized associated gas by adopting the diaphragm compressor is a new technology for the ground gathering and transportation of the associated gas.
Diaphragm compressor usually only is fit for compressing pure gas, has the compression ratio high, airtight characteristics that do not reveal, and associated gas contains a small amount of impurity, contains liquid at normal atmospheric temperature state to also can produce the lime set in compression process, in case liquid gathering in the air cavity, can lead to the diaphragm to break, the disk seat is invalid, seriously shortens the diaphragm life-span, and liquid gathering in a large number still can make the diaphragm compressor cylinder body produce the crackle because of suppressing pressure even, leads to the unable normal operating of compressor. Therefore, the oil well field associated gas closed pressurization gathering and transportation system and the use method thereof are developed, impurities and liquid components are removed, and the application of the technology to oilfield associated gas ground recovery is of great importance.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a closed pressurized gathering and transportation system for removing impurities and liquid in associated gas and realizing the purpose of closed pressurized transportation of the associated gas in an oil well field, in particular to the closed pressurized gathering and transportation system for the associated gas in the oil well field and a use method thereof.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
an airtight pressurization gathering and transportation system for associated gas in oil well field comprises
The inlet end of the well group header is communicated with an oil collecting pipeline of an oil well site;
the inlet end of the buffer tank is communicated with the outlet end of the well group header through a pipeline;
the inlet end of the gas-liquid separator is communicated with the outlet end of the buffer tank through a pipeline;
one end of the closed pressurizing gathering and transportation device is communicated with an air outlet of the gas-liquid separator through a pipeline;
one end of the external pipeline is communicated with the liquid outlet of the gas-liquid separator and the other end of the closed pressurizing gathering and conveying device through pipelines, and the other end of the external pipeline is discharged;
and the control module is connected with the closed pressurizing gathering and conveying device through a cable.
The airtight pressurization gathering and transporting device comprises a tertiary filter, a production inlet heat exchanger, an air inlet end buffer tank, a diaphragm compressor, an air cooler and an exhaust end buffer tank, wherein one end of the tertiary filter is communicated with an air outlet of the gas-liquid separator through a pipeline, the other end of the tertiary filter is sequentially communicated with the production inlet heat exchanger, the air inlet end buffer tank, the diaphragm compressor, the air cooler and the exhaust end buffer tank in series, and the exhaust end buffer tank is communicated with an external pipeline through a pipeline.
The three-stage filter, the air inlet end buffer tank, the diaphragm compressor and the exhaust end buffer tank are all provided with an inlet end, an air outlet and a liquid outlet, the production heat exchanger and the air cooler are provided with an air inlet and an air outlet, the inlet end of the three-stage filter is communicated with the air outlet of the gas-liquid separator through a pipeline, the air outlet of the three-stage filter is communicated with the air inlet of the production heat exchanger through a pipeline, the liquid outlet of the three-stage filter is communicated with an external conveying pipeline through a pipeline, the air outlet of the production heat exchanger is communicated with the inlet end of the air inlet end buffer tank through a pipeline, the air outlet of the air inlet end buffer tank is communicated with the inlet end of the diaphragm compressor through a pipeline, the liquid outlet of the air inlet end buffer tank is communicated with the external conveying pipeline through a pipeline, the, the air outlet of the air cooler is communicated with the inlet end of the exhaust end buffer tank through a pipeline, and the air outlet and the liquid outlet of the exhaust end buffer tank are communicated with an external pipeline.
And the liquid discharge ports of the gas-liquid separator, the three-stage filter, the air inlet end buffer tank, the diaphragm compressor and the air outlet end buffer tank are also connected with check valves through pipelines at the communicated positions of the pipelines and the external transmission pipeline.
And the three-stage filter, the production inlet heat exchanger, the air inlet end buffer tank, the diaphragm compressor, the air cooler and the exhaust end buffer tank are all connected with the control module through cables.
The control module adopts a PLC control module.
And a gas-liquid two-phase flowmeter is arranged on the external conveying pipeline.
The use method of the oil well site associated gas closed pressurized gathering and transferring system comprises any one of the oil well site associated gas closed pressurized gathering and transferring systems, and comprises the following steps:
the method comprises the following steps: the method comprises the following steps that an oil-gas mixture firstly enters a well group header, then enters a buffer tank and a gas-liquid separator for carrying out primary filtration and gas-liquid separation on liquid components in associated gas, gas separated by the gas-liquid separator enters a closed pressurization gathering and transportation device from a gas outlet through a pipeline, and liquid separated by the gas-liquid separator enters an external transportation pipeline from a liquid outlet through a pipeline;
step two: in the first step, the gas separated by the gas-liquid separator enters a three-stage filter in the closed pressurized gathering and transporting device through a pipeline from a gas outlet for filtering, a filter screen in the three-stage filter removes impurities in the associated gas, then the liquid filtered by the three-stage filter enters an external transportation pipeline through a pipeline, the gas in the three-stage filter enters a production heat exchanger through a pipeline from a gas outlet for heat exchange to vaporize part of low-temperature liquid components, then the vaporized gas enters a gas inlet end buffer tank from a gas outlet of the production heat exchanger for secondary filtration of the liquid components in the associated gas, the liquid filtered by the gas inlet end buffer tank enters an external transportation pipeline through a pipeline, the gas in the gas inlet end buffer tank enters a diaphragm compressor for pressurization, the liquid generated in the diaphragm compressor enters the external transportation pipeline through a pipeline, and the gas pressurized in the diaphragm compressor enters an air cooler through a pipeline for cooling, the cooled gas enters the exhaust end buffer tank through a pipeline, and the gas and liquid in the exhaust end buffer tank enter an output pipeline through the pipeline.
In the second step, the temperature and the pressure in the three-stage filter, the production-inlet heat exchanger, the air inlet end buffer tank, the diaphragm compressor, the air cooler and the exhaust end buffer tank are controlled by the control module, and the output flow of the external pipeline is monitored by the gas-liquid two-phase flow meter connected to the external pipeline.
The invention has the beneficial effects that:
compared with the prior art, the invention comprises the following steps:
1. the oil gas mixture enters a well group collecting pipe, then enters a buffer tank and a gas-liquid separator for primary filtration and gas-liquid separation of liquid components in associated gas, the associated gas in the separated gas-liquid separator enters a closed pressurization gathering and transporting device, the associated gas treated by the closed pressurization gathering and transporting device is input into an external transportation pipeline, the liquid separated in the gas-liquid separator and the closed pressurization gathering and transporting device enters the external transportation pipeline through the pipeline, and the associated gas closed pressurization gathering and transporting system is used for realizing the complete closed gathering and transporting of the associated gas in the oil field associated gas ground recovery technology, meanwhile, in the process of the closed pressurization of the associated gas, because the associated gas is subjected to multiple filtration and gas-liquid separation through the buffer tank 2, the gas-liquid separator 3 and the closed pressurization gathering and transporting device 4, the problems of diaphragm rupture and valve seat failure of a diaphragm in the process of compressing the gas by a diaphragm compressor are avoided, the reliability of the closed gathering and transportation system is higher.
2. The gas separated by the gas-liquid separator enters a three-stage filter through a pipeline for secondary filtration, then the gas enters a heat exchanger for heat exchange to vaporize part of low-temperature liquid components, then the gas produced in the heat exchanger enters a gas inlet end buffer tank for secondary filtration of liquid components in associated gas, the gas in the gas inlet end buffer tank enters a diaphragm compressor for pressurization, the pressurized gas is cooled through an air cooler, the cooled gas in the air cooler enters a gas outlet end buffer tank for pressure buffering and liquid removal at the same time, then the gas and the liquid in the gas outlet end buffer tank enter an external pipeline through pipelines for external discharge, the associated gas can be filtered for many times by using the structure, wherein the compression ratio of the whole pipeline can be large by using the diaphragm compressor, the gas inlet pressure of the diaphragm compressor is not less than 0.1MPa, and the gas outlet pressure of the diaphragm compressor is not more than 3.0MPa, and the diaphragm compressor is airtight and does not leak, liquid generated in the tertiary filter, the air inlet end buffer tank and the diaphragm compressor enters the external transmission pipeline through the pipeline to be discharged, and associated gas is purified through the arrangement of the tertiary filter, the production inlet heat exchanger and the air inlet end buffer tank, so that the problems of diaphragm rupture and valve seat failure in the process of compressing gas by the diaphragm compressor are avoided, and the service life of the diaphragm is prolonged.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Figure 1 is a schematic diagram of the associated gas recovery scheme of the present invention.
In the figure: 1-well group collecting pipe, 2-buffer tank, 3-gas-liquid separator, 4-closed pressurizing gathering and transportation device, 5-external transportation pipeline, 6-control module, 7-three-stage filter, 8-production-intake heat exchanger, 9-air intake end buffer tank, 10-diaphragm compressor, 11-air cooler and 12-exhaust end buffer tank.
Detailed Description
Example 1:
referring to fig. 1, the enclosed pressurized gathering and transportation system for associated gas at oil well site comprises
The inlet end of the well group collecting pipe 1 is communicated with an oil collecting pipeline of an oil well site;
the inlet end of the buffer tank 2 is communicated with the outlet end of the well group header 1 through a pipeline;
the gas-liquid separator 3 comprises an inlet end, an air outlet and a liquid outlet, and the inlet end of the gas-liquid separator 3 is communicated with the outlet end of the buffer tank 2 through a pipeline;
one end of the closed pressurizing gathering and transportation device 4 is communicated with the air outlet of the gas-liquid separator 3 through a pipeline;
one end of the external pipeline 5 is communicated with the liquid outlet of the gas-liquid separator 3 and the other end of the closed pressurizing gathering and conveying device 4 through pipelines, and the other end of the external pipeline 5 is discharged;
and the control module 6 is connected with the closed pressurizing gathering and transportation device 4 through a cable.
In actual use: the oil gas mixture enters a well group collecting pipe 1, then enters a buffer tank 2 and a gas-liquid separator 3 for carrying out primary filtration and gas-liquid separation on liquid components in associated gas, the associated gas in the separated gas-liquid separator 3 enters a closed pressurizing gathering and conveying device 4, the associated gas treated by the closed pressurizing gathering and conveying device 4 is input into an external conveying pipeline 5, the liquid separated in the gas-liquid separator 3 and the closed pressurizing gathering and conveying device 4 enters the external conveying pipeline 5 through pipelines, and the associated gas is totally and hermetically gathered and conveyed in the oil field associated gas ground recovery technology by using the associated gas closed pressurizing gathering and conveying system, meanwhile, in the process of the closed pressurizing treatment of the associated gas, because the oil field gas is subjected to multiple times of filtration and gas-liquid separation through the buffer tank 2, the gas-liquid separator 3 and the closed pressurizing gathering and conveying device 4, the problems of diaphragm rupture of a diaphragm and valve seat failure in the process of compressing the gas by a diaphragm compressor are avoided, the reliability of the closed gathering and transportation system is higher.
Example 2:
the present embodiment is different from embodiment 1 in that: the airtight pressurization gathering and transportation device 4 comprises a tertiary filter 7, a production inlet heat exchanger 8, an inlet end buffer tank 9, a diaphragm compressor 10, an air cooler 11 and an exhaust end buffer tank 12, one end of the tertiary filter 7 is communicated with an air outlet of the gas-liquid separator 3 through a pipeline, the other end of the tertiary filter 7 is sequentially communicated with the production inlet heat exchanger 8, the inlet end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust end buffer tank 12 in series, and the exhaust end buffer tank 12 is communicated with an external pipeline 5 through a pipeline.
In actual use: gas separated by the gas-liquid separator 3 enters a three-stage filter 7 through a pipeline for secondary filtration, then the gas enters a heat exchanger 8 for heat exchange to vaporize part of low-temperature liquid components, then the gas produced in the heat exchanger 8 enters a gas inlet end buffer tank 9 for secondary filtration of liquid components in associated gas, the gas in the gas inlet end buffer tank 9 enters a diaphragm compressor 10 for pressurization, the pressurized gas is cooled through an air cooler 11, the cooled gas in the air cooler 11 enters a gas outlet end buffer tank 12 for pressure buffering and liquid removal at the same time, then the gas and the liquid in the gas outlet end buffer tank 12 enter an external pipeline 5 through pipelines for external discharge, the associated gas can be filtered for multiple times by using the structure, wherein the whole pipeline compression ratio can be large by using the diaphragm compressor 10, and the gas inlet pressure of the diaphragm compressor is not less than 0.1MPa, The exhaust pressure is not more than 3.0MPa, the diaphragm compressor is sealed and does not leak, liquid generated in the three-stage filter 7, the air inlet end buffer tank 9 and the diaphragm compressor 10 enters the external transmission pipeline 5 through pipelines to be discharged, associated gas is purified through the three-stage filter 7, the production heat exchanger 8 and the air inlet end buffer tank 9, the problems of diaphragm rupture and valve seat failure in the process of compressing the gas of the diaphragm compressor are avoided, and the service life of the diaphragm is prolonged.
Example 3:
the present embodiment is different from embodiment 2 in that: the three-stage filter 7, the air inlet end buffer tank 9, the diaphragm compressor 10 and the exhaust end buffer tank 12 are all provided with an inlet end, an air outlet and an air outlet, the production heat exchanger 8 and the air cooler 11 are provided with an air inlet and an air outlet, the inlet end of the three-stage filter 7 is communicated with the air outlet of the gas-liquid separator 3 through a pipeline, the air outlet of the three-stage filter 7 is communicated with the air inlet of the production heat exchanger 8 through a pipeline, the liquid outlet of the three-stage filter 7 is communicated with the external conveying pipeline 5 through a pipeline, the air outlet of the production heat exchanger 8 is communicated with the inlet end of the air inlet end buffer tank 9 through a pipeline, the air outlet of the air inlet end buffer tank 9 is communicated with the inlet end of the diaphragm compressor 10 through a pipeline, the liquid outlet of the air inlet end buffer tank 9 is communicated with the external, the liquid outlet of the diaphragm compressor 10 is communicated with the external pipeline 5 through a pipeline, the air outlet of the air cooler 11 is communicated with the inlet end of the exhaust end buffer tank 12 through a pipeline, and the air outlet and the liquid outlet of the exhaust end buffer tank 12 are both communicated with the external pipeline 5.
In actual use: gas separated by the gas-liquid separator 3 enters the tertiary filter 7 from the inlet end of the tertiary filter 7 through a pipeline, then the gas is filtered, liquid in the tertiary filter 7 enters the external transmission pipeline 5 from the liquid outlet of the tertiary filter 7 through a pipeline, gas in the tertiary filter 7 enters the production heat exchanger 8 from the gas outlet of the tertiary filter 7 through a pipeline from the gas inlet of the production heat exchanger 8, the gas exchanges heat in the production heat exchanger 8 to vaporize part of low-temperature liquid components, then the gas produced in the heat exchanger 8 enters the gas inlet end buffer tank 9 from the inlet end of the gas inlet end buffer tank 9 through a pipeline from the gas outlet of the production heat exchanger 8 to buffer, liquid produced in the gas inlet end buffer tank 9 enters the external transmission pipeline 5 from the liquid outlet of the gas inlet end buffer tank 9 through a pipeline, and the gas in the gas inlet end buffer tank 9 enters the diaphragm compression diaphragm compressor 10 from the inlet end of the diaphragm compressor 10 through a pipeline from the gas outlet of the gas inlet end buffer tank 9 In the machine 10, diaphragm compressor 10 carries out the pressure boost with gaseous, gaseous after the pressure boost passes through the pipeline from the air inlet of air cooler 11 from the gas outlet of diaphragm compressor 10 and gets into in the air cooler 11, air cooler 11 cools down gas, liquid that produces in the diaphragm compressor 10 passes through in the pipeline gets into defeated pipeline 5 from the liquid outlet on the diaphragm compressor 10, gas through the cooling in the air cooler 11 gets into in exhaust end buffer tank 12 from the entry end of exhaust end buffer tank 12 through the pipeline from the gas outlet of air cooler 11 through the pipeline, exhaust end buffer tank 12 cushions gas, remove the liquid simultaneously, gaseous and the liquid that produces in the exhaust end buffer tank 12 after through the buffering all get into defeated pipeline 5 through the pipeline from the gas vent and the leakage fluid dram of exhaust end buffer tank 12 and discharge outward.
Example 4:
this embodiment is different from embodiment 1 or embodiment 3 in that: and check valves are connected to the liquid outlets of the gas-liquid separator 3, the three-stage filter 7, the air inlet end buffer tank 9, the diaphragm compressor 10 and the air outlet end buffer tank 12 through pipelines at the communication part of the pipelines and the external transmission pipeline 5.
In actual use: the connecting check valve is arranged on the pipeline at the communication position of the liquid discharge ports of the gas-liquid separator 3, the three-stage filter 7, the air inlet end buffer tank 9, the diaphragm compressor 10 and the air exhaust end buffer tank 12 and the external transmission pipeline 5 through pipelines, and the check valve is used for preventing liquid from flowing back to the closed pressurization gathering and transmission device (4), namely flowing back to the gas-liquid separator 3, the three-stage filter 7, the air inlet end buffer tank 9, the diaphragm compressor 10 or the air exhaust end buffer tank 12 through the pipelines.
Example 5:
the present embodiment is different from embodiment 2 in that: and the three-stage filter 7, the production inlet heat exchanger 8, the air inlet end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust end buffer tank 12 are all connected with the control module 6 through cables.
Preferably, the control module 6 is a PLC control module.
In actual use: the control module 6 adopts a PLC control module, and the temperature and the pressure in the three-stage filter 7, the production and intake heat exchanger 8, the air inlet end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust end buffer tank 12 in the closed pressurization gathering and transportation device 4 are controlled by the PLC control module, the PLC control module in the invention adopts the prior art, and the PLC control module in the prior art can be applied to the invention as long as the PLC control module can control the temperature and the pressure in the three-stage filter 7, the production and intake heat exchanger 8, the air inlet end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust end buffer tank 12 in the closed pressurization gathering and transportation device 4.
Example 6:
the present embodiment is different from embodiment 1 in that: the external pipeline 5 is provided with a gas-liquid two-phase flowmeter.
In actual use: the gas-liquid two-phase flow meter on the external transportation pipeline 5 is used for monitoring when the external transportation pipeline 5 is discharged, and the gas quantity and the liquid quantity of the external transportation pipeline 5 can be conveniently measured and monitored by using the gas-liquid two-phase flow meter.
Example 7:
a method for using an oil well site associated gas closed pressurized gathering and transportation system, comprising the oil well site associated gas closed pressurized gathering and transportation system of any one of embodiments 1-5, and comprising the following steps:
the method comprises the following steps: the oil-gas mixture firstly enters a well group manifold 1, then enters a buffer tank 2 and a gas-liquid separator 3 for primary filtration and gas-liquid separation of liquid components in associated gas, gas separated by the gas-liquid separator 3 enters a closed pressurized gathering and transportation device 4 from a gas outlet through a pipeline, and liquid separated by the gas-liquid separator 3 enters an external transportation pipeline 5 from a liquid outlet through a pipeline;
step two: in the first step, the gas separated by the gas-liquid separator 3 enters a third-stage filter 7 in the closed pressurized gathering device 4 through a pipeline from a gas outlet for filtering, a filter screen in the third-stage filter 7 removes impurities in the associated gas, then liquid filtered by the third-stage filter 7 enters an external conveying pipeline 5 through a pipeline, the gas in the third-stage filter 7 enters a production heat exchanger 8 through a pipeline from a gas outlet for heat exchange to vaporize part of low-temperature liquid components, then the vaporized gas enters a gas inlet end buffer tank 9 from a gas outlet of the production heat exchanger 8 for secondary filtration of liquid components in the associated gas, the liquid filtered by the gas inlet end buffer tank 9 enters the external conveying pipeline 5 through a pipeline, the gas in the gas inlet end buffer tank 9 enters a membrane compressor 10 for pressurization, the liquid generated in the membrane compressor 10 enters the external conveying pipeline 5 through a pipeline, and the gas pressurized in the membrane compressor 10 enters an air cooler 11 through a pipeline for cooling, the cooled gas enters the exhaust end buffer tank 12 through a pipeline, and the gas and liquid in the exhaust end buffer tank 12 enter the external pipeline 5 through the pipeline.
According to the method, the associated gas is purified through the arrangement of the three-stage filter 7, the production heat exchanger 8 and the gas inlet end buffer tank 9, so that the problems of diaphragm rupture and valve seat failure of the diaphragm compressor in the gas compression process are solved, the service life of the diaphragm is prolonged, and the reliability of the whole closed gathering and transportation system is higher.
Example 8:
this embodiment is different from embodiment 7 in that: in the second step, the temperature and the pressure in the three-stage filter 7, the production-inlet heat exchanger 8, the inlet-end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust-end buffer tank 12 are controlled by the control module 6, and the output flow of the external pipeline 5 is monitored by a gas-liquid two-phase flow meter connected to the external pipeline 5.
In actual use: the temperature and the pressure in the three-stage filter 7, the production inlet heat exchanger 8, the air inlet end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust end buffer tank 12 are controlled by the control module 6, the control module 6 adopts the control module which can realize the temperature and the pressure monitoring in the three-stage filter 7, the production inlet heat exchanger 8, the air inlet end buffer tank 9, the diaphragm compressor 10, the air cooler 11 and the exhaust end buffer tank 12 by the PLC control module in the prior art and is suitable for the technical scheme of the invention, the output flow of the external pipeline 5 is monitored by a gas-liquid two-phase flow meter connected to the external pipeline 5, and the gas quantity and the liquid quantity of the external pipeline 5 are conveniently measured and monitored.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Claims (8)
1. The utility model provides an airtight pressure boost gathering and transportation system of oil well site associated gas, characterized by: comprises that
The inlet end of the well group collecting pipe (1) is communicated with an oil collecting pipeline of an oil well site;
the inlet end of the buffer tank (2) is communicated with the outlet end of the well group header (1) through a pipeline;
the gas-liquid separator (3) comprises an inlet end, an air outlet and a liquid outlet, and the inlet end of the gas-liquid separator (3) is communicated with the outlet end of the buffer tank (2) through a pipeline;
one end of the closed pressurizing gathering and transportation device (4) is communicated with the air outlet of the gas-liquid separator (3) through a pipeline;
one end of the external pipeline (5) is communicated with the liquid outlet of the gas-liquid separator (3) and the other end of the closed pressurizing gathering and conveying device (4) through pipelines, and the other end of the external pipeline (5) is discharged;
the control module (6), the control module (6) is connected with the airtight pressurization gathering and transportation device (4) through the cable conductor;
the airtight pressurization gathering and transporting device (4) comprises a tertiary filter (7), a production inlet heat exchanger (8), an inlet end buffer tank (9), a diaphragm compressor (10), an air cooler (11) and an exhaust end buffer tank (12), wherein one end of the tertiary filter (7) is communicated with an air outlet of the gas-liquid separator (3) through a pipeline, the other end of the tertiary filter (7) is sequentially communicated with the production inlet heat exchanger (8), the inlet end buffer tank (9), the diaphragm compressor (10), the air cooler (11) and the exhaust end buffer tank (12) in series, and the exhaust end buffer tank (12) is communicated with an outer transportation pipeline (5) through a pipeline.
2. The system of claim 1, wherein the system comprises: the three-stage filter (7), the air inlet end buffer tank (9), the diaphragm compressor (10) and the exhaust end buffer tank (12) are respectively provided with an inlet end, an air outlet and a liquid outlet, the production inlet heat exchanger (8) and the air cooler (11) are respectively provided with an air inlet and an air outlet, the inlet end of the three-stage filter (7) is communicated with the air outlet of the gas-liquid separator (3) through a pipeline, the air outlet of the three-stage filter (7) is communicated with the air inlet of the production inlet heat exchanger (8) through a pipeline, the liquid outlet of the three-stage filter (7) is communicated with the external conveying pipeline (5) through a pipeline, the air outlet of the production inlet heat exchanger (8) is communicated with the inlet end of the air inlet end buffer tank (9) through a pipeline, the air outlet of the air inlet end buffer tank (9) is communicated with the inlet end of the diaphragm compressor (10) through a pipeline, and, the gas outlet of the diaphragm compressor (10) is communicated with the gas inlet of the air cooler (11) through a pipeline, the liquid outlet of the diaphragm compressor (10) is communicated with the external pipeline (5) through a pipeline, the gas outlet of the air cooler (11) is communicated with the inlet end of the exhaust end buffer tank (12) through a pipeline, and the gas outlet and the liquid outlet of the exhaust end buffer tank (12) are communicated with the external pipeline (5).
3. The system of claim 2, wherein the system comprises: and check valves are connected to the liquid discharge ports of the gas-liquid separator (3), the three-stage filter (7), the air inlet end buffer tank (9), the diaphragm compressor (10) and the air outlet end buffer tank (12) through pipelines at the communication positions of the pipelines and the external transmission pipeline (5).
4. The system of claim 1, wherein the system comprises: and the three-stage filter (7), the production-inlet heat exchanger (8), the air inlet end buffer tank (9), the diaphragm compressor (10), the air cooler (11) and the exhaust end buffer tank (12) are all connected with the control module (6) through cables.
5. The system of claim 4, wherein the system comprises: the control module (6) adopts a PLC control module.
6. The system of claim 1, wherein the system comprises: the output pipeline (5) is provided with a gas-liquid two-phase flowmeter.
7. A method for using an oil well field associated gas closed pressurized gathering and transportation system, which comprises the oil well field associated gas closed pressurized gathering and transportation system of any one of claims 1-5, and is characterized in that: the method comprises the following steps:
the method comprises the following steps: the method comprises the following steps that an oil-gas mixture firstly enters a well group header (1), then enters a buffer tank (2) and a gas-liquid separator (3) for primary filtration and gas-liquid separation of liquid components in associated gas, gas separated by the gas-liquid separator (3) enters a closed pressurization gathering device (4) from a gas outlet through a pipeline, and liquid separated by the gas-liquid separator (3) enters an external conveying pipeline (5) from a liquid outlet through a pipeline;
step two: in the first step, gas separated by the gas-liquid separator (3) enters a three-stage filter (7) in a closed pressurization gathering and transportation device (4) from a gas outlet through a pipeline for filtering, a filter screen in the three-stage filter (7) removes impurities in associated gas, then liquid filtered by the three-stage filter (7) enters an external transportation pipeline (5) through a pipeline, gas in the three-stage filter (7) enters a production heat exchanger (8) from a gas outlet through a pipeline for heat exchange to vaporize part of low-temperature liquid components, then the vaporized gas enters a gas inlet end buffer tank (9) from a gas outlet of the production heat exchanger (8) for secondary filtration of liquid components in the associated gas, liquid filtered by the gas inlet end buffer tank (9) enters the external transportation pipeline (5) through a pipeline, and gas in the gas inlet end buffer tank (9) enters a diaphragm (10) for pressurization, liquid generated in the diaphragm compressor (10) enters the external conveying pipeline (5) through a pipeline, gas after being pressurized in the diaphragm compressor (10) enters the air cooler (11) through the pipeline to be cooled, the cooled gas enters the exhaust end buffer tank (12) through the pipeline, and the gas and the liquid in the exhaust end buffer tank (12) enter the external conveying pipeline (5) through the pipeline.
8. The method for using the oil well field associated gas closed pressurized gathering and transportation system as claimed in claim 7, wherein the method comprises the following steps: in the second step, the temperature and the pressure in the three-stage filter (7), the production-inlet heat exchanger (8), the air inlet end buffer tank (9), the diaphragm compressor (10), the air cooler (11) and the exhaust end buffer tank (12) are controlled by the control module (6), and the output flow of the external pipeline (5) is monitored by a gas-liquid two-phase flow meter connected to the external pipeline (5).
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| CN114961691B (en) * | 2022-05-28 | 2023-06-27 | 陕西星辰石油科技有限责任公司 | Oil gas gathering, transportation, extraction, metering and pressurizing device for shale oil development and method thereof |
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| CN202598131U (en) * | 2012-04-13 | 2012-12-12 | 中国石油天然气股份有限公司 | Oil-gas mixing transportation device of crude oil and oil field gas in oil field |
| CN203741293U (en) * | 2014-03-10 | 2014-07-30 | 宁夏庆港洁能科技有限公司 | Integrated recovery device for well site associated gas |
| CN204552696U (en) * | 2015-01-27 | 2015-08-12 | 严庆雨 | Oil well associated gas automatic processing device |
| CN104845692A (en) * | 2015-04-03 | 2015-08-19 | 浙江大学 | Oilfield associated gas complete liquefaction recovery system and method thereof |
| CN107035345A (en) * | 2017-06-14 | 2017-08-11 | 蚌埠市荣强压缩机制造有限公司 | A kind of sleeve in oil field associated gas recovery device |
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