CN110242264A - A kind of packing method and completion structure for single-well injection-production - Google Patents
A kind of packing method and completion structure for single-well injection-production Download PDFInfo
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- CN110242264A CN110242264A CN201910623000.XA CN201910623000A CN110242264A CN 110242264 A CN110242264 A CN 110242264A CN 201910623000 A CN201910623000 A CN 201910623000A CN 110242264 A CN110242264 A CN 110242264A
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- 238000000605 extraction Methods 0.000 claims description 66
- 238000002347 injection Methods 0.000 claims description 61
- 239000007924 injection Substances 0.000 claims description 61
- 239000012530 fluid Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
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- 239000013535 sea water Substances 0.000 claims description 3
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
A kind of packing method for single-well injection-production, comprising the following steps: (1) the tripping in dual channel tubing string into well；(2) the filling packing particle into the annular space between dual channel tubing string and the borehole wall, until packing particle is full of annular space and accumulates to form continuous packer；(3) annular space is closed；And a kind of completion structure using the above method.A kind of completion structure for single-well injection-production is equipped with the continuous packer formed by packing particle packing in the annular space between the dual channel tubing string and the borehole wall including dual channel tubing string in the wellbore is arranged.The continuous packing physical efficiency that the present invention accumulates formation in the wellbore piles with whole cross section, and seal isolation effect is good, has very strong spatially adaptive.During running string, not by the obstruction for the packer being preset on tubing string, work progress is easy, and the problem of packer meets card in the wellbore will not occur.Packing particle can be returned first when recycling and drain into outer wellhead by tubing string, so that tubing string recycling is never likely to become possibility.
Description
Technical field
The invention belongs to oil and gas exploitation fields, are related to a kind of single-well injection-production oil/gas well, more particularly to a kind of use
In the packing method and completion structure of single-well injection-production.
Background technique
During oil and gas exploitation, for the production effect for improving hiding, the development scheme of water filling gas injection is generallyd use
With displacement formation oil, accelerates the oil gas speed of response and improve ultimate recovery.Common method is on producing well periphery in practice
Dedicated water injection well is set, since this method needs specially beat water injection well, necessarily increases cost of winning；On the other hand, band is encountered
The easy water breakthrough of the oil reservoir in crack, water-driven effect are poor.Based on the above issues, there has been proposed the methods of single-well injection-production.In for example,
State patent CN201810104442.9 discloses a kind of double-deck concentric oil tubes of use or parallel double tube as dual channel tubing string, leads to
Cross the method that CO_2 stimulation turns to drive the fine and close oil of exploitation；It is same that CN201510506961.4 discloses a kind of horizontal well fracturing
Well note adopts oil production method；CN201480038110.5 discloses a kind of improved the recovery of hydrocarbons side using multiple induced fractures
Method；CN201610294730.6 discloses a kind of Horizontal Well in Fractured Reservoir note and adopts asynchronous (i.e. type of respiration) recovery method；
Double pressure break horizontal well cyclic water stimulations that CN201710078354.1 discloses a kind of zip mode (i.e. odd-even alternation formula) cloth seam recover the oil
Method；CN201510103268.2 discloses a kind of more prosecutor methods of a well of marine LOW PERMEABILITY RESERVOIR thick oil pay exploitation.
In above-mentioned technical proposal, for realize single-well injection-production, need inject crack well section and extraction crack well section progress every
From sealing, pass through the annular space between dual channel tubing string and the borehole wall to avoid the displacing medium (water, gas etc.) exported from injection runner,
It is flowed directly to the extraction crack location of annular space and enters extraction runner.The prior art is typically employed in suitable position setting packer
Mode, to different well sections carry out isolating seal, common packer include piston suppress cartridge extend out formula packer, meet
Liquid swell packers etc..In actual use, since single-well injection-production generally requires that many cracks, multiple well sections is isolated, need
Greater number of packer is set in the wellbore, this will bring following problems: first is that packing effect is poor, especially pit shaft
The borehole wall it is irregular when, often cannot achieve and be effectively isolated, and can not test to isolation effect, can not find certain in time
A unencapsulated problem of packer, also can not timely be remedied；Second is that packer meets card since packer quantity is more
Probability also significantly increases；It can not be proposed in addition the tubing string lower going-into-well of packer is set after, it is subsequent to seriously affect construction well future
The progress of operation；Third is that altering slot if existed outside casing for well-case perforating well, existing packer can not be close to slot progress is altered
Envelope.The presence of above-mentioned technical problem seriously constrains the application of single-well injection-production technology in actual production.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, provide a kind of structure it is simple, it is easy to use, packing it is adaptive
Should be able to power is strong, packing effect is good, low in cost, tubing string convenient for recycling the packing method and completion structure for single-well injection-production.
To achieve the above object, present invention employs following technical solutions:
A kind of packing method for single-well injection-production, comprising the following steps: (1) the tripping in dual channel tubing string into well；The double fluid
Road tubing string includes injection runner and extraction runner, and the injection runner is equipped with one or more inlets, and the extraction runner is set
There are one or more extraction mouths；(2) the filling packing particle into the annular space between dual channel tubing string and the borehole wall, until packing particle
Full of annular space and accumulate to form continuous packer；(3) annular space is closed.
Further, the well head of the well is equipped with wellhead assembly or production tree；The method of the filling packing particle are as follows: pass through
The packing fluid for carrying packing particle is injected in the casing annulus channel of wellhead assembly or production tree into annular space；The closing annular space
Method are as follows: close the casing annulus valve of wellhead assembly or production tree.
Further, the heel end of the dual channel tubing string is equipped with band filling channel packer；The side of the filling packing particle
Method are as follows: inject the packing fluid for carrying packing particle into annular space by the filling mouth with filling channel packer；The closed-loop
Empty method are as follows: close the filling mouth with filling channel packer.
Further, the heel end of the dual channel tubing string, which is equipped with, meets liquid swell packers；The method of the filling packing particle
Are as follows: the packing fluid for carrying packing particle is injected into annular space from well head；The method of the closing annular space are as follows: after sand off, meet
Liquid swell packers continue to expand, and annular space is closed.
Further, the packing particle includes sand, sand, quartz sand, gravel, haydite, hollow glass micropearl or fine coal
One of ash is a variety of.
Further, the packing particle is polyethylene, polypropylene, polyphenyl alkene, polyvinyl chloride, nylon66 fiber or styrene diethyl
The spherical shape or polymorphic structure of alkene benzene cross-linked copolymer material, partial size are 50-300 mesh, and real density is 0.8-1.4 g/cm3。
Further, the method for the filling packing particle into annular space are as follows: injection carries filling for packing particle into annular space
Fill out liquid.
Further, the packing fluid is water flooding, surface fresh water or seawater, and the volume ratio of particle is insulated in the packing fluid
Concentration is 1-20%.
Further, the inlet and extraction mouth are equipped with filter.
Further, the inlet and/or extraction mouth are equipped with volume control device.
Further, further comprising the steps of: (4) recycle dual channel tubing string.
Further, the method recycled to dual channel tubing string is as follows: (4.1) establish the row of returning channel；(4.2) Xiang Shuan
Drain is returned in injection in the injection runner and/or extraction runner of runner tubing string；(4.3) packer particle is returned into discharge well from annular space
Mouthful；(4.4) dual channel tubing string is extracted on.
To achieve the above object, the present invention additionally uses following technical solution:
A kind of completion structure for single-well injection-production, including dual channel tubing string in the wellbore is arranged；The dual channel tubing string packet
Include injection runner and extraction runner, the injection runner is equipped with one or more inlets, the extraction runner equipped with one or
Multiple extraction mouths are equipped with the continuous packing formed by packing particle packing in the annular space between the dual channel tubing string and the borehole wall
Body.
Further, the well head of the well is equipped with wellhead assembly or production tree；The wellhead assembly or the sleeve ring of production tree
Empty valve is in off state, and continuous packer is enclosed in annular space.
Further, the heel end of the dual channel tubing string is equipped with band filling channel packer；The band fills channel packer
Filling mouth be in off state, continuous packer is enclosed in annular space.
Further, the heel end of the dual channel tubing string, which is equipped with, meets liquid swell packers, and continuous packer is enclosed in annular space
In.
Further, the packing particle includes sand, sand, quartz sand, gravel, haydite, hollow glass micropearl or fine coal
One of ash is a variety of.
Further, the packing particle is polyethylene, polypropylene, polyphenyl alkene, polyvinyl chloride, nylon66 fiber or styrene diethyl
The spherical shape or polymorphic structure of alkene benzene cross-linked copolymer material, partial size are 50-300 mesh, real density 0.8-1.4g/cm3。
Further, the inlet and extraction mouth are equipped with filter.
Further, the inlet and/or extraction mouth are equipped with volume control device.
A kind of packing method and completion structure for single-well injection-production of the present invention, relative to traditional packer is used, even
Continuous packer is that particle packing is formed in filling, whole cross section can be piled with, and seal isolation effect is good, has very strong sky
Between adaptivity, even casing outside exist alter slot casing perforated hole, using the present invention can also realize single-well injection-production, greatly expand
The application range of single-well injection-production.It, can be directly sharp not by the obstruction for the packer being preset on tubing string during running string
With tripping in column apparatus on existing well, work progress is easy, and the problem of packer meets card in the wellbore will not occur.Tubing string returns
Packing particle can be returned first and drain into outer wellhead by the time receiving, so that tubing string recycling is never likely to become possibility.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the packing method for single-well injection-production of the present invention；
Fig. 2 is the present invention a kind of overall structure and course of work schematic diagram of the completion structure for single-well injection-production.
Description of symbols: the ground 1-；2- wellhead sealing；3- casing；4- cement sheath；5- casing annulus valve；6- annular space；
7- injection string；8- produces tubing string；9- inlet；10- produces mouth；11- injects crack；12- produces crack；It is sealed in 13- annular space
Every the continuous packer that particle packing is formed.
Specific embodiment
Below in conjunction with attached drawing 1, a kind of packing method and completion structure for single-well injection-production of the present invention is further illustrated
Specific embodiment.A kind of packing method and completion structure for single-well injection-production of the present invention is not limited to retouching for following embodiment
It states.
Embodiment 1:
The present embodiment provides a kind of packing method for single-well injection-production.
As shown in Figure 1, including the following steps: (1) tripping in dual channel tubing string into well；The dual channel tubing string includes injection
Runner and extraction runner, the injection runner are equipped with one or more inlets, and the extraction runner is adopted equipped with one or more
Outlet；(2) the filling packing particle into the annular space between dual channel tubing string and the borehole wall, until packing particle is full of annular space and accumulates
Form continuous packer；(3) annular space is closed；It is fixed in annular space to make to insulate particle, relatively stable structure is formed, to keep away
When exempting to inject runner injection displacing medium in production process, particle is insulated by the effect of pressure difference and media flow, from packing section
It is mobile toward well head direction, so that continuous packer is destroyed, the packing effect failure causing continuous packer to adopt section to note；
(4) when after producing or needing, dual channel tubing string is recycled；Lead to specifically includes the following steps: (4.1) establish the row of returning
Road；(4.2) into the injection runner of dual channel tubing string and/or extraction runner, drain is returned in injection；(4.3) by packer particle from ring
Sky, which returns, drains into outer wellhead；(4.4) dual channel tubing string is extracted on.
The working principle of this method is as follows: as shown in connection with fig. 2, pit shaft vertically pass through many cracks (including man-made fracture or
Intrinsic fracture)；According to presetting, some cracks are set as injection crack, and inlet is corresponding to it, and some cracks are set as adopting
Crack out, extraction mouth are corresponding to it；At this point, every group of extraction mouth and adjacent inlet constitute one group of flooding unit.If not right
Adjacent inlet is sealed with extraction mouth is isolated, and will directly pass through pit shaft from the displacing medium of inlet injection mineshaft annulus
Annular space flow to extraction mouth, to cause inlet and produce " short circuit " of mouth.According to the above technical scheme, by annular space
Full of packing particle, and be enclosed in annular space, form the continuous packer for being full of annular space, thus by adjacent inlet with
Extraction mouth is isolated from each other, and prevention is flowed in mineshaft annulus from the displacing medium that inlet flows out, while displacement may also allow for be situated between
Matter under differential pressure action from inlet Radial Flow to injection crack in, and allow inject crack in displacing medium in pressure difference
Under effect from from injection crack through formation flow to extraction crack, then from extraction flow in fracture to extraction mouth.In production process,
Under the action of pressure difference, after displacing medium enters injection crack, it will enter in the stratum of flooding unit and the displacement stratum
Oil gas is mobile to the lesser extraction crack of pressure, enters extraction runner eventually by extraction mouth and is plucked out of.
In the technical solution of the present embodiment, for different shaft structures, different methods can be taken to fill packing particle
It is specific as follows to form continuous packer: the well of wellhead assembly or production tree, the method for filling packing particle are equipped with for well head
Are as follows: the packing fluid for carrying packing particle is injected into annular space by the casing annulus channel of wellhead assembly or production tree；The envelope
The method of closed loop sky are as follows: close the casing annulus valve of wellhead assembly or production tree.When recycling dual channel tubing string, it is only necessary to open
Casing annulus valve can establish the row of returning channel.In production process, injection string injects during displacing medium, wants in annular space
It is pressurized to the injection pressure not less than injection string, avoids the pressure of horizontal segment inlet from being higher than annular pressure, to make to insulate
Particle is mobile to well head direction, destroys the packing performance of continuous packer.For tripping in dual channel tubing string and dual channel tubing string
Heel end is equipped with the well for meeting liquid swell packers, the method for filling packing particle are as follows: directly inject carrying envelope into annular space from well head
Every the packing fluid of particle；The method for closing annular space are as follows: by the way that the chance liquid swell packers of dual channel tubing string heel end are arranged in by ring
Sky closing.The technical solution is met liquid swell packers by setting and is enclosed in particle is insulated in annular space, since the chance liquid is swollen
Swollen packer, which does not have, returns row function, therefore when recycling dual channel tubing string, needs meeting liquid expansion envelope by the methods of drilling
The row of returning channel is established every device.The well with filling channel packer is equipped with for the heel end in dual channel tubing string；Filling packing particle
Method are as follows: by with filling channel packer filling mouth inject into annular space carrying insulate particle packing fluid；Closed-loop
Empty method are as follows: close the filling mouth with filling channel packer.When recycling dual channel tubing string, it is only necessary to open band filling channel
The filling mouth of packer, can establish the row of returning channel.Above-mentioned three kinds of technical solutions can easily realize filling for packing particle
It fills out and the row of returning, and is convenient for the tripping in and recycling of dual channel tubing string.
The dual channel tubing string of different structure, such as Chinese patent can be used in the technical solution of the present embodiment
The double-deck concentric oil tubes or parallel double tube that CN201810104442.9 is used.It is advantageous in that, is managed using the double-deck concentric oil tubes
Column is integrally cylindrical, convenient in tripping in pit shaft, the technology and equipment of running string and proposition tubing string are highly developed, can directly adopt
Its heel end is closed with existing packer；But the internal structure of the double-deck concentric oil tubes is complex, between ectonexine
Isolation difficulty it is larger.It is advantageous in that using row double tube, a down tube can establish injection channel and extraction channel, still
Since its cross sectional shape is not circle, special lower tube apparatus auxiliary construction is needed.The existing oil pipe of two-way can also be directlyed adopt
Successive G.I.H is not necessarily to additional customized dual channel tubing string respectively as injection channel and extraction channel, when down tube can first under
One, next again construct relatively simple；But this method is not easy to close its heel end using conventional packer.
In the technical solution of the present embodiment, the method for the filling packing particle into annular space can refer to international monopoly Shen
Please (application number: PCT/CN2010/002014) propose it is entitled " production sections of oil and gas wells anti-channeling packing particle, use this particle
Completion method and oil production method " in patent, the method for filling packing particle into annular space passes through the injection into annular space and carries envelope
Every the packing fluid of particle, make to insulate particle packing in annular space.Specifically, the packing fluid can be water flooding, surface fresh water
Or seawater, the volume by volume concentration that particle is insulated in the packing fluid is 1-20%；The packing particle can be sand, sand, gravel
One of stone, quartz sand, haydite, hollow glass micropearl or flyash are a variety of；More preferably, the packing particle is poly- second
Alkene, polypropylene, polyphenyl alkene, polyvinyl chloride, the spherical shape of nylon66 fiber or SDEB styrene diethylenebenzene cross-linked copolymer material or abnormity knot
Structure, partial size are 50-300 mesh, real density 0.8-1.4g/cm3；More preferably, the packing particle real density is 1.00-
1.10g/cm3, the density of water is more nearly in order to fill and the row of returning.
Preferably, it to avoid packing particle from entering injection runner or extraction runner by entering inlet or extraction mouth, needs
Will be using inlet and extraction mouth equipped with filtration device structure, the filter is using the filter structure equipped with outer jointing jacket.For
Make multiple production liquid segment syncs productions in pit shaft, it is desirable to which the displacing medium of each inlet injects flow, and the production liquid of extraction mouth
Flow is identical or uniform；Or for there is the case where big leakage crack in pit shaft, avoid displacing medium from big leakage crack
It slatterns, needs artificially to reduce the displacing medium flow of this section of inlet, reduces the production fluid flow amount of extraction mouth；Based on above-mentioned need
It asks, need rationally to be arranged each inlet and produces the flow of mouth, when it is implemented, flow control can be installed in inlet and extraction mouth
Device processed；There are three types of mounting means for volume control device, first is that only installed in inlet, second is that only in extraction mouth installation, third is that
It is installed simultaneously in inlet and extraction mouth.The volume control device can be the nozzle of different pore size size.More as one kind
Add specific embodiment, the injection runner or extraction runner can directly adopt water-control sieve tube in the prior art and realize, packet
It includes the water-control sieve tube (ICD) without additional flow resistance function dynamic for oil stream to water phase and has volume to water phase is dynamic for oil stream
Water-control sieve tube (AICD) of outer additional flow resistance function etc..
Embodiment 2:
The present embodiment provides a kind of completion structure for single-well injection-production formed by 1 the method for embodiment.Such as Fig. 2 institute
Show, including dual channel tubing string in the wellbore is arranged；The dual channel tubing string includes injection runner and extraction runner, the injection
Runner is equipped with one or more inlets, and the extraction runner is equipped with one or more extraction mouths；The dual channel tubing string and well
The continuous packer formed by packing particle packing is equipped in annular space between wall.It is the shaft structure that is used in the present embodiment, double
Runner tubing string and packing particle etc., are arranged referring to embodiment 1.
Embodiment 3:
The present embodiment provides a kind of concrete application of technical solution described in Examples 1 and 2.
As shown in Fig. 2, certain oil well oil reservoir is 10 meters thick, low permeability formation, permeability only has 1 millidarcy；The oil well horizontal section
Hole diameter is 8.5 inch, and horizontal section length is 1000 meters, and it is open hole wall that pit shaft horizontal segment, which produces section, and horizontal segment has artificial fracturing
20, crack seam, about 50 meters of adjacent slits interval, 20 crack are set to injection crack and produce crack, will produce
Section is divided into 10 flooding units.The independent injection string of tripping in and extraction tubing string, respectively as injection runner and are adopted in pit shaft
Runner out；It is equipped with injection crack and extraction crack corresponding position on injection string and extraction tubing string and has flow control function
Nozzle.Well head is equipped with wellhead assembly (being not drawn into figure), and injection string, extraction tubing string are connected to the external pipe of wellhead assembly,
Annular space valve is connected to wellhead assembly.(in conjunction with Fig. 2, illustrate appended drawing reference related content.)
According to traditional packer mode, 20 packers are at least used.Meanwhile the present embodiment using injection string and is adopted
The mode that tubing string is independently arranged out, being sealed isolation using existing packer will be extremely difficult, because injection string and adopting
Tubing string is arbitrary in down-hole horizontal section relative positional relationship out, such as may be planar alignment relationship, it may be possible to which be arranged above and below pass
System, or distortion relative positional relationship etc., packer not only need to seal injection string periphery and extraction tubing string periphery simultaneously,
8.5 inch open hole walls are also sealed, packing effect in this way is poor, needs further with two tubing strings of 20 packers while parallel
A possibility that going into the well, card is met in work progress is high, also will be extremely difficult when recycling 20 packers and injection-production column jacket in the future.
The present embodiment uses following steps, realizes multiple inlets and produces the seal isolation between mouth: (1) tripping in 2 7/
The injection string and extraction tubing string of 8 inch；Specifically, first tripping in has 10 inlets using existing wellhead column tripping in equipment
Injection string to suitable position, then tripping in has the extraction tubing strings of 10 extraction mouths to suitable position；Later, in pithead position
Wellhead assembly is installed.Two root canal columns distinguish tripping in, and two root canal columns distinguish that tripping in is relatively two-tube while parallel tripping in, construction are more held
Easily.(2) pass through the casing annulus channel of wellhead assembly, injection carries the packing fluid of packing particle into mineshaft annulus, until envelope
It every particle fullness level section annular space and accumulates, the continuous packer that formation length is 1000 meters；Specifically, the packing fluid uses
Water flooding, the packing particle are spherical SDEB styrene diethylenebenzene cross-linked copolymer material, and partial size is about 150 mesh, real density
For 1.05g/cm3.(3) wellhead assembly casing annulus valve is closed, that is, forms completion structure.
After the completion of above-mentioned completion structure, water is injected from well head injection string, high yield will be produced from well head extraction tubing string
Crude oil.In the present embodiment, length provides key effect for the packing effect of 1000 meters of continuous packer for high yield oil stream.It is long
Degree makes entire horizontal segment pit shaft not have fluid-channeling channel for 1000 meters of continuous packer.The buffer action of continuous packer will be entire
Horizontal segment packing is at 10 independent flooding units, the corresponding one group of injection crack of each flooding unit and extraction crack.Injection pipe
The injection water of column flows to injection crack by inlet, by entire fracture surface, injects water to extraction fracture surface seepage flow, the injection
The seepage flow of water drives formation oil to extraction flow in fracture.It injects crack and extraction crack crack wall surface is 10 meters high, unilateral length 150
Rice, 300 meters of bilateral length, every crack area is about 3000 square metres, and this seepage area is very big, can increase substantially oil
Yield.In addition, interstitial distance only has 50 meters, displacement seepage flow distance is short in each flooding unit, and such oil production further mentions
It is high.Since corresponding 10 cracks of 10 inlets are all filling the water in injection process, 10 extraction mouths are all being flowed by the oil of displacement,
This mouthful of water horizontal well has 10 flooding units while producing, and rate of oil production is improved at 10 times.In the present embodiment, length is 1000 meters
The packing of continuous packer, which acts on, provides key effect for the horizontal well high yield oil stream.Continuous packer is to up to 1000 meters
Horizontal segment continuously insulates, and avoids the short circuit of inlet and the flowing of outflux fluid, so that in injection process, inlet and extraction
Mouth is capable of forming pressure difference, so that a pair of of note of each flow unit adopts fracture surface, there are injection production pressure differences, up to 1000 meters of water
Flat section continuously insulates, while establishing 10 notes and adopting flow unit while injecting while recovering the oil.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.Technical solution of the present invention is applicable not only to horizontal well, equally may be used also
Suitable for straight well or inclined shaft；Whole filling can be not only carried out to pit shaft inside annular space forms continuous packer, it can also be only to production
Section mineshaft annulus or one or more snippets specific mineshaft annulus carry out partial stowage.In production process, the displacing medium of injection is logical
Chang Weishui, further includes nitrogen, carbon dioxide, dry gas and rich gas etc. and other improve the displacing agent of recovery ratio, as polymer is molten
Liquid, surfactant solution etc..Crack described in technical solution of the present invention includes intrinsic fracture and man-made fracture, but not
It should exclude, the present invention may also apply to not have crannied well.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention
Protection scope.
Claims (20)
1. a kind of packing method for single-well injection-production, it is characterised in that: the following steps are included:
(1) the tripping in dual channel tubing string into well；The dual channel tubing string includes injection runner and extraction runner, the injection runner
Equipped with one or more inlets, the extraction runner is equipped with one or more extraction mouths；
(2) the filling packing particle into the annular space between dual channel tubing string and the borehole wall, until packing particle is full of annular space and accumulates
Form continuous packer；
(3) annular space is closed.
2. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the well head of the well is equipped with well
Mouth device or production tree；
The method of the filling packing particle are as follows: injected and taken into annular space by the casing annulus channel of wellhead assembly or production tree
Packing fluid with packing particle；
The method of the closing annular space are as follows: close the casing annulus valve of wellhead assembly or production tree.
3. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the dual channel tubing string with
End is equipped with band filling channel packer；
The method of the filling packing particle are as follows: carrying packing is injected into annular space by the filling mouth with filling channel packer
The packing fluid of particle；
The method of the closing annular space are as follows: close the filling mouth with filling channel packer.
4. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the dual channel tubing string with
End, which is equipped with, meets liquid swell packers；
The method of the filling packing particle are as follows: inject the packing fluid for carrying packing particle into annular space from well head；
The method of the closing annular space are as follows: after sand off, meet liquid swell packers and continue to expand, annular space is closed.
5. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the packing particle includes sand
One of son, sand, quartz sand, gravel, haydite, hollow glass micropearl or flyash are a variety of.
6. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the packing particle is poly- second
Alkene, polypropylene, polyphenyl alkene, polyvinyl chloride, the spherical shape of nylon66 fiber or SDEB styrene diethylenebenzene cross-linked copolymer material or abnormity knot
Structure, partial size are 50-300 mesh, and real density is 0.8-1.4 g/cm3。
7. the packing method according to claim 1 for single-well injection-production, it is characterised in that: described to fill envelope into annular space
Every the method for particle are as follows: into annular space, injection carries the packing fluid of packing particle.
8. the packing method according to claim 7 for single-well injection-production, it is characterised in that: the packing fluid is stratum
Water, surface fresh water or seawater, the volume by volume concentration that particle is insulated in the packing fluid is 1-20%.
9. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the inlet and extraction mouth
Equipped with filter.
10. the packing method according to claim 1 for single-well injection-production, it is characterised in that: the inlet and/or adopt
Outlet is equipped with volume control device.
11. the packing method according to claim 1 for single-well injection-production, it is characterised in that: further comprising the steps of:
(4) dual channel tubing string is recycled.
12. the packing method according to claim 11 for single-well injection-production, it is characterised in that: described to dual channel tubing string
The method recycled is as follows:
(4.1) row of returning channel is established；
(4.2) into the injection runner of dual channel tubing string and/or extraction runner, drain is returned in injection；
(4.3) packer particle is returned into discharge well head from annular space；
(4.4) dual channel tubing string is extracted on.
13. a kind of completion structure for single-well injection-production, including dual channel tubing string in the wellbore is arranged；The dual channel tubing string
Including injection runner and extraction runner, the injection runner is equipped with one or more inlets, and the extraction runner is equipped with one
Or multiple extraction mouths, it is characterised in that: be equipped in the annular space between the dual channel tubing string and the borehole wall by packing particle packing shape
At continuous packer.
14. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the well head of the well is equipped with
Wellhead assembly or production tree；The wellhead assembly or the casing annulus valve of production tree are in off state, and continuous packer is sealed
It closes in annular space.
15. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the dual channel tubing string
Heel end is equipped with band filling channel packer；The filling mouth of the band filling channel packer is in off state, by continuous packer
It is enclosed in annular space.
16. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the dual channel tubing string
Heel end, which is equipped with, meets liquid swell packers, and continuous packer is enclosed in annular space.
17. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the packing particle includes
One of sand, sand, quartz sand, gravel, haydite, hollow glass micropearl or flyash are a variety of.
18. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the packing particle is poly-
Ethylene, polypropylene, polyphenyl alkene, polyvinyl chloride, nylon66 fiber or SDEB styrene diethylenebenzene cross-linked copolymer material spherical shape or abnormity
Structure, partial size are 50-300 mesh, real density 0.8-1.4g/cm3。
19. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the inlet and extraction
Mouth is equipped with filter.
20. the completion structure according to claim 13 for single-well injection-production, it is characterised in that: the inlet and/or
It produces mouth and is equipped with volume control device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910623000.XA CN110242264A (en) | 2019-07-11 | 2019-07-11 | A kind of packing method and completion structure for single-well injection-production |
| PCT/CN2020/090967 WO2021004163A1 (en) | 2019-07-11 | 2020-05-19 | Packing method for injection and production in same well and well completion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910623000.XA CN110242264A (en) | 2019-07-11 | 2019-07-11 | A kind of packing method and completion structure for single-well injection-production |
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| Publication Number | Publication Date |
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| CN110242264A true CN110242264A (en) | 2019-09-17 |
Family
ID=67891848
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910623000.XA Pending CN110242264A (en) | 2019-07-11 | 2019-07-11 | A kind of packing method and completion structure for single-well injection-production |
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| CN (1) | CN110242264A (en) |
| WO (1) | WO2021004163A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021004163A1 (en) * | 2019-07-11 | 2021-01-14 | 安东柏林石油科技（北京）有限公司 | Packing method for injection and production in same well and well completion structure |
| CN113266303A (en) * | 2021-06-28 | 2021-08-17 | 安东柏林石油科技（北京）有限公司 | Packer, method and well completion structure for improving axial packing effect of continuous packing body along shaft |
| WO2022060658A1 (en) * | 2020-09-15 | 2022-03-24 | Saudi Arabian Oil Company | Concurrent fluid injection and hydrocarbon production from a hydraulically fractured horizontal well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113982547A (en) * | 2021-11-02 | 2022-01-28 | 江苏金石机械集团有限公司 | Same-well layered production and injection wellhead device with cable |
| WO2024060415A1 (en) * | 2022-09-21 | 2024-03-28 | 中国石油化工股份有限公司 | Asynchronous cycle-based oil extraction apparatus, method and system |
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| WO2021004163A1 (en) | 2021-01-14 |
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