CN107587848A - A kind of multi-channel tube and the method using its progress layering gas recovery - Google Patents
A kind of multi-channel tube and the method using its progress layering gas recovery Download PDFInfo
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- CN107587848A CN107587848A CN201710918926.2A CN201710918926A CN107587848A CN 107587848 A CN107587848 A CN 107587848A CN 201710918926 A CN201710918926 A CN 201710918926A CN 107587848 A CN107587848 A CN 107587848A
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- gas
- gas production
- channel tube
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- collecting pipe
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Abstract
The application is related to a kind of multi-channel tube and carries out the method for layering gas recovery using it.According to the multi-channel tube of the application, it is made up of at least one interior air collecting pipe set from inside to outside, the anticorrosive coat being extruded in outside interior air collecting pipe, the screen layer being extruded in outside anticorrosive coat, the dress sheath being extruded in outside screen layer and sheath, packed layer is filled with the space between anticorrosive coat and interior air collecting pipe.Layering gas recovery is carried out using the multi-channel tube of the application, its technique is simple, easy to control, efficiency high, can realize the accurate control on the ground to each gas production layer, and do not interfere with each other mutually between different gas production layers.
Description
Technical field
The method of layering gas recovery is carried out the present invention relates to a kind of multi-channel tube and using it, suitable for the technology of gas recovery
Field.
Background technology
Gas recovery refer to the completion operation operation about gas field development in natural gas extraction engineering, gas well liquid loading system with
Gas producing technology mode selects, underground work technology, well testing and production logging technology, volume increase excavating resistance, natural gas
The general name of the technology such as production, underground work and well workover, surface gathering and transferring and processing and gas production engineering design, is natural gas
A system engineering for occupying leading position in exploitation engineering, high benefit, high recovery rate exploitation to natural gas field, which have, lifts
The effect of sufficient weight.
When thering are multiple series of strata to close in gas well to adopt, due to the pressure between gas-bearing formation, gas-bearing formation physical property, Primordial Qi property equal difference
It is different, often interfere with each other, prevent part gas-bearing formation from playing due effect.To reduce or eliminate interlayer interference, separate zone production is answered,
Including layering gas recovery and its supporting technology.Single tube point is adopted in the producing well for exploiting more gas-bearing formations, is separated into gas-bearing formation with packer
Some intervals, interlayer interference is reduced with production mandrel, for ease of the gentle well management of underground work, in a bite well, can typically divide 3
~4 intervals carry out layering gas recovery.
The gas reservoir in China belongs to the elastic water drive gas reservoir of closure mostly, all place of production layer water to some extent under development.
Due to the interference of stratum water, gas field is set to enter depletion stage in advance recovery percent of reserves is not also in the case of high, or even cause gas
Well water floods stopping production, influences gas field ultimate recovery, therefore how to improve the recovery ratio of Gas Reservoirs, is domestic and international institute for a long time
Endeavour to study and one of the important topic that solves.Find that single tube point is adopted in practice often to fail.Because when will be a certain
Gas-bearing formation gas production, which is finished into the gas-bearing formation that during next gas production layer gas production, gas production finishes, can often have current to import in well, so as to
Whole gas well is flooded, causes the failure of exploitation and the waste of well-digging early stage stage work, the maintenance cost in later stage is also higher.
The content of the invention
The application is in order to overcome drawbacks described above of the prior art, there is provided a kind of multi-channel tube and is layered using it
The method of gas production, its simple and quick construction, do not disturb between each other, fast and efficiently can gather out by gas.
The application is related to a kind of multi-channel tube for layering gas recovery, by least one interior gas production set from inside to outside
The anticorrosive coat that manage, is extruded in outside interior air collecting pipe, the screen layer being extruded in outside anticorrosive coat, the dress armour being extruded in outside screen layer
Layer and sheath are formed, and packed layer is filled with the space between anticorrosive coat and interior air collecting pipe.
Preferably, anticorrosive coat is graphene ceramic thin film, and graphene ceramic thin film is by ceramics, graphene, organosilicon
Auxiliary agent, barium sulfate, epoxide-resin glue, butanediol are 1 according to quality proportioning:0.35:0.2:0.13:0.2:0.12 well mixed system
Into.The quantity of interior air collecting pipe can be three, be distributed in isosceles triangle；Sheath is high density polyethylene (HDPE) sheath；Sheath is filled by steel wire
It is made by twisting.
Preferably, the internal diameter of interior air collecting pipe is 30-50mm, wall thickness 2-3mm, pitch 40-60mm；The thickness of anticorrosive coat
For 1-1.5mm；The external diameter of screen layer is 50-70mm；The external diameter for filling sheath is 50.5-70.5mm；The external diameter of sheath is 55-
80mm。
Preferably, screen layer is the graphene semiconductor screen layer of resistance to water tree, the graphene semiconductor screen layer of resistance to water tree by with
Lower components by weight percent is formed:90 parts of ethylene-vinyl acetate copolymer, 16 parts of nitrile rubber, 80 parts of conductive filler, 9 parts of graphene are adjacent
8 parts of dioctyl phthalate, 5 parts of di-n-octyl sebacate, 4 parts of cumyl peroxide, 16 parts of organosilicon auxiliary agent, 3 parts of carborundum,
3 parts of carbon fiber.
On the other hand, the application further relates to a kind of gas production system, including multi-channel tube as described above, the multi-channel tube
Upper end connected with the defeated component of the collection on ground, the defeated component of the collection includes muff, separator, throttling arrangement and gas collection branch line,
Needle-valve is provided between gas production wellhead and muff, is connected with needle-valve and safety valve between muff and separator, separator and
Thermometer is provided between throttling arrangement, atmospheric valve is provided between throttling arrangement and gas collection branch line, the bottom of separator is provided with meter
Measuring tank, measuring tank connect with gas tank and pond respectively；Corrosion inhibiter tank and exhaust-valve are provided with another lateral line of gas production wellhead.
Another further aspect, the application is related to a kind of carries out layering gas recovery using multi-channel tube as described above or gas production system
Method, comprise the following steps：
First, ground is cleared up
Equipment unnecessary on ground is removed, to reduce the back pressure of ground drag and gas well；
2nd, down tube
Multi-channel tube is sent into well, and separator, multi-channel tube are put into the gap between multi-channel tube and sleeve pipe
Interior to be provided with least one interior air collecting pipe, each interior air collecting pipe is connected to surface gathering and transferring by single control valve on the ground
Component, the import of interior air collecting pipe are respectively communicated with different gas production layers, pass through separator interval open form between different gas production layers
Into respective gas production space；
3rd, it is depressured discharge opeing
Wellhead venting, reduce back pressure, increase gas production pressure, remove the tamper that is retained in during down tube in sleeve pipe and
The water oozed out, to ensure being smoothed out for gas production operation；
4th, gaslift water pumping gas production
Gas lift valve is opened, high-pressure natural gas is injected into gas well, is tapped natural gas using gaslift drainage；
5th, gas production is collected
The upper end of multi-channel tube is connected with the defeated component of the collection on ground, utilizes the defeated collect components gas production of the collection on ground.
Preferably, natural gas enters muff heat temperature raising after gas production wellhead comes out after needle-valve depressurizes, then through pin
Valve enters separator after being depressurized to slightly above distribution pressure, and after removing liquid solid impurity in the separator, natural gas is from separator
Top out exports after throttling arrangement measures from gas collection branch line；After the liquid solid isolated is put into measuring tank from separator bottom
It is respectively put into gas tank and pond.
Layering gas recovery is carried out using the multi-channel tube of the application, its technique is simple, easy to control, efficiency high, can realize
On the ground to the accurate control of each gas production layer, and it is not interfere with each other mutually between different gas production layers.In addition, under regular situation,
The maintenance in later stage need not be carried out.
Brief description of the drawings
Fig. 1 shows the diagrammatic cross-section of the multi-channel tube for layering gas recovery according to the application.
Fig. 2 shows the schematic diagram that layering gas recovery is carried out using the multi-channel tube of the application.
Fig. 3 shows the arrangement schematic diagram of the surface gathering and transferring component of gas production system.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
As shown in figure 1, for layering gas recovery multi-channel tube by set from inside to outside at least one interior air collecting pipe 1, squeeze
Wrap the anticorrosive coat 6 outside interior air collecting pipe 1, the screen layer 2 being extruded in outside anticorrosive coat 6, the dress armour being extruded in outside screen layer 2
Layer 3 and sheath 4 are formed, and packed layer 5 is filled with the space between anticorrosive coat 6 and interior air collecting pipe 1.Preferably, interior air collecting pipe 1
Quantity be three, be distributed in isosceles triangle.Preferably, the ratio between the thickness of screen layer 2 with filling sheath 3 is 0.1-10, more preferably
Can be 1.Sheath 4 can be high density polyethylene (HDPE) sheath.Dress sheath 3 can be made by twisting by steel wire.Due in the gas-bearing formation of underground
Contain the corrosive gas such as substantial amounts of hydrogen sulfide, carbon dioxide, it is therefore desirable to which anticorrosive coat is set in the inside of air collecting pipe.It is preferred that
Ground, anticorrosive coat may be selected to be graphene ceramic thin film, and graphene ceramic thin film can be helped by ceramics, graphene, organosilicon
Agent, barium sulfate, epoxide-resin glue, butanediol are 1 according to quality proportioning:0.35:0.2:0.13:0.2:0.12 well mixed system
Into.
The internal diameter of interior air collecting pipe 1 can be 30-50mm, wall thickness 2-3mm, pitch 40-60mm；The thickness of anticorrosive coat 6
For 1-1.5mm；The external diameter of screen layer 2 is 50-70mm；The external diameter for filling sheath 3 is 50.5-70.5mm；The external diameter of sheath 4 is 55-
80mm。
In a preferred embodiment, the internal diameter of interior air collecting pipe 1 is 40mm, wall thickness 2mm, pitch 50mm；Anti-corrosion
The thickness of layer 6 is 1.5mm；The external diameter of screen layer 2 is 53.27mm；The external diameter for filling sheath 3 is 53.87mm；The external diameter of sheath 4 is
62mm。
In another preferred embodiment, the internal diameter of interior air collecting pipe 1 is 45mm, wall thickness 2.2mm, pitch 50mm；
The thickness of anticorrosive coat 6 is 1.5mm；The external diameter of screen layer 2 is 60.7mm；The external diameter for filling sheath 3 is 61.5mm；The external diameter of sheath 4
For 72mm.
If necessary, it is necessary to utilize its transmitting telecommunication number or control signal after air collecting pipe insert into stratum, such as work as needs
When pressure or temperature sensor being set under a subterranean formation or needing to be controlled subsurface equipment, it is necessary to these letters of wire transmission
Number.Preferably, screen layer 2 can use the graphene semiconductor screen layer of resistance to water tree, to make it have certain wire performance, use
In transmitting telecommunication number.The graphene semiconductor screen layer of resistance to water tree of the application can be made up of following components by weight percent:Ethyl vinyl acetate
90 parts of ethylene copolymer, 16 parts of nitrile rubber, 80 parts of conductive filler, 9 parts of graphene, 8 parts of dioctyl phthalate, decanedioic acid
5 parts of dioctyl ester, 4 parts of cumyl peroxide, 16 parts of organosilicon auxiliary agent, 3 parts of carborundum, 3 parts of carbon fiber.
Packed layer 5 can be by expanded polypropylene, nitrile rubber, polytetrafluoroethylene (PTFE), carbon fiber, cumyl peroxide
(DCP), the double lauryl antioxidant (DLTP) of azodicarbonamide (ADCA), thio-2 acid are 1 according to mass ratio:0.3-
0.32:0.18-0.2:0.15-0.18:0.13-0.16:0.08-0.12:0.05-0.08 is well mixed to be made.Preferably, foam
It is polypropylene, nitrile rubber, polytetrafluoroethylene (PTFE), carbon fiber, cumyl peroxide (DCP), azodicarbonamide (ADCA), thio
The mass ratio of the double lauryl antioxidant (DLTP) of dipropionic acid can be 1:0.3:0.2:0.17:0.15:0.1:0.06.
Referring to Fig. 2, the method schematic diagram that layering gas recovery is carried out using the multi-channel tube of the application illustrated therein is.Need
It is bright, the schematic diagram for carrying out gas production to three gas production layers with threeway deferent is shown in Fig. 2.Need to understand, art technology
The number of passage can be arranged to other numbers by personnel according to the needs of gas production layer number, i.e., inside multi-channel tube in adopt
The number of tracheae can be configured according to the quantity of gas production layer, to ensure that each gas production layer can be used alone at least one
Air collecting pipe.Specifically, the method that layering gas recovery is carried out using multi-channel tube as described above, is comprised the following steps:
First, ground is cleared up
Equipment unnecessary on ground is removed, to reduce the back pressure of ground drag and gas well.
2nd, down tube
Multi-channel tube 10 is sent into well, and separator 13 is put into the gap between multi-channel tube 10 and sleeve pipe 11.
At least one interior air collecting pipe 12 is provided with multi-channel tube 10, each interior air collecting pipe is connected by single control valve on the ground
It is connected to surface gathering and transferring component.The import of interior air collecting pipe is respectively communicated with different gas production layers, between different gas production layers by point
Spacing body 13 is spaced apart and forms respective gas production space.
3rd, it is depressured discharge opeing
Wellhead venting, back pressure is reduced, increase gas production pressure, remove the tamper being retained in during down tube in sleeve pipe 11
With the water oozed out, to ensure being smoothed out for gas production operation.
4th, gaslift water pumping gas production
Gaslift water pumping gas production be using high-pressure gas well energy or compressor be gaslift power, by means of underground gas lift valve
Effect, high-pressure natural gas is injected into the pit shaft of gas well, reduce the density of fluid column in tubing string, supplement stratum energy, improve lifting
Ability, shaft bottom hydrops is excluded, the one kind for recovering gas capacity of well helps pressure spray process.
Gas lift valve is opened, high-pressure natural gas is injected into gas well, is tapped natural gas using gaslift drainage, you can completes gas
Lift water pumping gas production.
5th, gas production is collected
The upper end of multi-channel tube is connected to form a kind of gas production system with the defeated component of the collection on ground, utilizes defeated group of the collection on ground
Part collects gas production.As shown in figure 3, which show the arrangement schematic diagram of the defeated component of collection of the application.Collecting defeated component includes insulation
Set 23, separator 25, throttling arrangement 27 and gas collection branch line 28, are provided with needle-valve 22 between gas production wellhead 21 and muff 23, protect
Needle-valve 22 and safety valve 24 are connected between temperature set 23 and separator 25, thermometer is provided between separator 25 and throttling arrangement 27
26, atmospheric valve 29 is provided between throttling arrangement 27 and gas collection branch line 28, the bottom of separator 25 is provided with measuring tank 210, metering
Tank 210 connects with gas tank 211 and pond 212 respectively.Corrosion inhibiter tank 214 and row are provided with another lateral line of gas production wellhead 21
Empty valve 213, to inject corrosion inhibiter into pipeline respectively and well pressure is vented, protect pipeline safety.
Natural gas enters the heat temperature raising of muff 23 after gas production wellhead 21 comes out after the decompression of needle-valve 22, then through pin
Valve 22 enters separator 25 after being depressurized to slightly above distribution pressure, in separator 25 remove liquid solid impurity after, natural gas from
The top of separator 25 out exports after the metering of throttling arrangement 27 from gas collection branch line 28.The liquid solid isolated is under separator 25
Portion is respectively put into gas tank 211 and pond 212 after being put into measuring tank 210.If only producing water not aerogenesis, liquid is directly from separation
Device 25 is put into pond 212 after metering in re-injection disused well, in order to avoid pollution environment.For safe gas production, peace is housed in component flow
Full valve 24 and atmospheric valve 29, once equipment superpressure, safety valve 24 just automatically turns on pressure release, can also open the emergency blow-down of atmospheric valve 29
Pressure release.The gas well big to aquifer yield, if driving a well gas production difficulty, atmospheric valve draining can be first used, after water is reduced, pressure is gone up
Atmospheric valve is closed again, and gas is inputted gas collection branch line.The upstream of throttling arrangement 27 can also set thermometer 26, to measure gas collection at any time
Temperature.
Layering gas recovery is carried out using the multi-channel tube of the application, its technique is simple, easy to control, efficiency high, can realize
On the ground to the accurate control of each gas production layer, and it is not interfere with each other mutually between different gas production layers.Under regular situation, it is not necessary to
The maintenance in later stage is carried out, has saved later maintenance cost.
Although disclosed herein embodiment as above, described content only to facilitate understand the present invention and adopt
Embodiment, it is not limited to the present invention.Any those skilled in the art to which this invention pertains, this is not being departed from
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (9)
- A kind of 1. multi-channel tube for layering gas recovery, it is characterised in that by set from inside to outside at least one interior air collecting pipe, It is extruded in the anticorrosive coat outside interior air collecting pipe, the screen layer being extruded in outside anticorrosive coat, the dress sheath being extruded in outside screen layer Formed with sheath, packed layer is filled with the space between anticorrosive coat and interior air collecting pipe.
- 2. multi-channel tube according to claim 1, it is characterised in that anticorrosive coat is graphene ceramic thin film, graphene Ceramic thin film is 1 according to quality proportioning by ceramics, graphene, organosilicon auxiliary agent, barium sulfate, epoxide-resin glue, butanediol: 0.35:0.2:0.13:0.2:0.12 well mixed is made.
- 3. multi-channel tube according to claim 1 or 2, it is characterised in that the quantity of interior air collecting pipe is three, in isosceles triangle Distribution；Sheath is high density polyethylene (HDPE) sheath；Dress sheath is made by twisting by steel wire.
- 4. multi-channel tube according to claim 3, it is characterised in that the internal diameter of interior air collecting pipe is 30-50mm, wall thickness 2- 3mm, pitch 40-60mm；The thickness of anticorrosive coat is 1-1.5mm；The external diameter of screen layer is 50-70mm；Dress sheath external diameter be 50.5-70.5mm；The external diameter of sheath is 55-80mm.
- 5. multi-channel tube according to claim 1 or 2, it is characterised in that screen layer is the graphene semiconductor screen of resistance to water tree Layer is covered, the graphene semiconductor screen layer of resistance to water tree is made up of following components by weight percent：90 parts of ethylene-vinyl acetate copolymer, 16 parts of nitrile rubber, 80 parts of conductive filler, 9 parts of graphene, 8 parts of dioctyl phthalate, 5 parts of di-n-octyl sebacate, peroxide Change 4 parts of diisopropylbenzene (DIPB), 16 parts of organosilicon auxiliary agent, 3 parts of carborundum, 3 parts of carbon fiber.
- 6. a kind of gas production system, it is characterised in that described more including the multi-channel tube as any one of claim 1-5 The upper end of tube channel connects with the defeated component of the collection on ground, and the defeated component of collection includes muff, separator, throttling arrangement and gas collection Branch line, needle-valve is provided between gas production wellhead and muff, needle-valve and safety valve are connected between muff and separator, separated Thermometer is provided between device and throttling arrangement, atmospheric valve is provided between throttling arrangement and gas collection branch line, the bottom of separator is set There is measuring tank, measuring tank connects with gas tank and pond respectively；Corrosion inhibiter tank and row are provided with another lateral line of gas production wellhead Empty valve.
- 7. a kind of method that multi-channel tube using any one of claim 1-5 carries out layering gas recovery, it is characterised in that Comprise the following steps：First, ground is cleared upEquipment unnecessary on ground is removed, to reduce the back pressure of ground drag and gas well；2nd, down tubeMulti-channel tube is sent into well, and separator is put into the gap between multi-channel tube and sleeve pipe, is set in multi-channel tube There is at least one interior air collecting pipe, each interior air collecting pipe is connected to surface gathering and transferring group by single control valve on the ground Part, the import of interior air collecting pipe are respectively communicated with different gas production layers, are spaced apart and are formed by separator between different gas production layers Respective gas production space；3rd, it is depressured discharge opeingWellhead venting, back pressure is reduced, increase gas production pressure, removed the tamper being retained in during down tube in sleeve pipe and ooze out Water, to ensure being smoothed out for gas production operation；4th, gaslift water pumping gas productionGas lift valve is opened, high-pressure natural gas is injected into gas well, is tapped natural gas using gaslift drainage；5th, gas production is collectedThe upper end of multi-channel tube is connected with the defeated component of the collection on ground, utilizes the defeated collect components gas production of the collection on ground.
- 8. a kind of method that gas production system using described in claim 6 carries out layering gas recovery, it is characterised in that including following step Suddenly：First, ground is cleared upEquipment unnecessary on ground is removed, to reduce the back pressure of ground drag and gas well；2nd, down tubeMulti-channel tube is sent into well, and separator is put into the gap between multi-channel tube and sleeve pipe, is set in multi-channel tube There is at least one interior air collecting pipe, each interior air collecting pipe is connected to surface gathering and transferring group by single control valve on the ground Part, the import of interior air collecting pipe are respectively communicated with different gas production layers, are spaced apart and are formed by separator between different gas production layers Respective gas production space；3rd, it is depressured discharge opeingWellhead venting, back pressure is reduced, increase gas production pressure, removed the tamper being retained in during down tube in sleeve pipe and ooze out Water, to ensure being smoothed out for gas production operation；4th, gaslift water pumping gas productionGas lift valve is opened, high-pressure natural gas is injected into gas well, is tapped natural gas using gaslift drainage；5th, gas production is collectedThe upper end of multi-channel tube is connected with the defeated component of the collection on ground, utilizes the defeated collect components gas production of the collection on ground.
- 9. according to the method for claim 8, it is characterised in that natural gas depressurizes after gas production wellhead comes out through needle-valve Enter muff heat temperature raising afterwards, then enter separator after needle-valve is depressurized to slightly above distribution pressure, remove in the separator After liquid solid impurity, natural gas out exports at the top of separator after throttling arrangement measures from gas collection branch line；The liquid isolated Solid is respectively put into gas tank and pond after being put into measuring tank from separator bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710918926.2A CN107587848B (en) | 2017-09-30 | 2017-09-30 | Multi-channel pipe and method for layered gas production by using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918926.2A CN107587848B (en) | 2017-09-30 | 2017-09-30 | Multi-channel pipe and method for layered gas production by using same |
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| CN107587848A true CN107587848A (en) | 2018-01-16 |
| CN107587848B CN107587848B (en) | 2023-07-14 |
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Cited By (1)
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| CN111396009A (en) * | 2020-04-21 | 2020-07-10 | 信达科创（唐山）石油设备有限公司 | Integrated composite overweight injection system and working method thereof |
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| CN207229025U (en) * | 2017-09-30 | 2018-04-13 | 河北华通线缆集团股份有限公司 | A kind of multi-channel tube and the gas production system containing it |
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| CN104100229A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Method and skid-mounted device for heating by using wellhead natural gas |
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| Publication number | Publication date |
|---|---|
| CN107587848B (en) | 2023-07-14 |
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