CN205778790U - Layered steam injection pipe column and injection and production system - Google Patents
Layered steam injection pipe column and injection and production system Download PDFInfo
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- CN205778790U CN205778790U CN201620504282.3U CN201620504282U CN205778790U CN 205778790 U CN205778790 U CN 205778790U CN 201620504282 U CN201620504282 U CN 201620504282U CN 205778790 U CN205778790 U CN 205778790U
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- steam injection
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- packer
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 171
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title description 7
- 230000005484 gravity Effects 0.000 claims abstract description 18
- 230000035699 permeability Effects 0.000 claims description 41
- 238000000605 extraction Methods 0.000 claims description 22
- 238000005304 joining Methods 0.000 claims description 9
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 238000010795 Steam Flooding Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 146
- 239000010410 layer Substances 0.000 description 31
- 230000015572 biosynthetic process Effects 0.000 description 18
- 230000000694 effects Effects 0.000 description 11
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical group C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 5
- 238000005213 imbibition Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a steam injection pipe post and notes system of adopting in layering, steam injection pipe post in layering includes: the casing is provided with a first perforation section and a second perforation section which are respectively communicated with the first target oil layer and the second target oil layer; the oil pipe is sleeved in the sleeve, and the oil pipe and the sleeve form an oil sleeve annulus; the first injection allocation device, the second injection allocation device and the bottom ball seat are sequentially connected to the oil pipe along the gravity direction; a first steam injection packer, a second steam injection packer and a third steam injection packer are sequentially arranged in the oil sleeve annulus along the gravity direction; the first steam injection packer and the second steam injection packer can seal the first perforation section; the second steam injection packer and the third steam injection packer can seal the second perforation section. Steam injection tubular column and notes system of adopting of layering can be used for improving steam drive oil reservoir and use the degree, excavates latent surplus oil.
Description
Technical field
This utility model relates to field of petroleum exploitation, particularly to a kind of Stratified Waterflooding and injection and extraction system.
Background technology
During industrialization steam drive development, owing in interlayer, layer and the objective reality of horizontal contradiction, making
Obtaining oil reservoir remaining oil distribution and become extremely complex, reservoir heterogeneity is serious.Especially into degrading adjustment rank
Section, while macrovoid is more and more unimpeded, owing to being had clay particle to be affected by steam injection impurity or formation crude,
Part fine pore may be blocked, has been further exacerbated by the anisotropism of reservoir.
At present, conventional stable injection and extraction system is that oil well is also recovering the oil while each steam injection well steam injection of oil reservoir,
There is pressure release point in oil reservoir, the raising causing steam injection pressure is limited.Note for a long time through aforesaid way and adopt
After exploitation, underground has formed relatively-stationary note and has adopted connection corresponding relation, concrete:
In plane: when a bite oil well be two to or multidirectional imitated time, due to the difference of layer intrinsic permeability, wherein
One direction note adopt association good for mainly by efficacious prescriptions to, and other direction note to adopt association poor be secondary by efficacious prescriptions
To.
In longitudinal direction: aspect in layer, typically define note adopt passage along Relative High Permeability, lower resistance band between oil and gas well,
Oil displacement efficiency is gradually lowered；Interlayer aspect, when injection-production well has multiple production layer, high permeability formation preferentially imitated and
Becoming and mainly go out liquid layer, gone out liquid phase to being in suppressed state by interlayer interference low-permeability layer, potentiality can not be filled
Distribution is waved.
For the problem above that presently, there are, it is necessary to develop a kind of new injection and extraction system to improve steam flooding
Hide development degree, Remaining Oil.
Utility model content
The purpose of this utility model is to provide a kind of Stratified Waterflooding and injection and extraction system, it is possible to be used for improving steaming
Vapour oil reservoirs development degree, Remaining Oil.
Above-mentioned purpose of the present utility model can use following technical proposal to realize:
A kind of Stratified Waterflooding, described Stratified Waterflooding can at least be fed through first object oil reservoir and second
Target oil reservoir, and the permeability of described first object oil reservoir is higher than described second target oil reservoir, described layering note
Steam pipe post includes:
Sleeve pipe, its be provided with for described first object oil reservoir, the second target oil reservoir be respectively communicated with first
Perforated interval, the second perforated interval；
Being set in the oil pipe in described sleeve pipe, described oil pipe forms oil jacket annular space with sleeve pipe；
The first distributor of being connected in turn on described oil pipe along gravity direction, the second distributor, bottom ball
Seat；
It is disposed with the first steam injection packer, the second steam injection envelope along gravity direction in described oil jacket annular space
Every device, the 3rd steam injection packer；
Described first perforated interval can be insulated by described first steam injection packer, the second steam injection packer；
Described second perforated interval can be insulated by described second steam injection packer, the 3rd steam injection packer；
Described first distributor is between described first steam injection packer and the second steam injection packer；
Described second distributor is between described second steam injection packer and the 3rd steam injection packer.
In a preferred embodiment, described oil pipe is additionally provided with telescoping tube.
In a preferred embodiment, on the oil pipe between described telescoping tube and described first steam injection packer also
It is provided with storm valve.
In a preferred embodiment, described first distributor is provided with first and joins vapour lock, and described first joins vapour
The height of mouth is positioned at first object oil reservoir, and its aperture scalable；
Described second distributor is provided with second and joins vapour lock, and described second height joining vapour lock is positioned at the second target
In oil reservoir, and its aperture scalable.
In a preferred embodiment, the permeability of described first object oil reservoir is more than 1000 × 10-3um2；
The permeability of described second target oil reservoir is 10 × 10-3um2To 100 × 10-3um2Between.
A kind of injection and extraction system, comprising: the first steam injection well, the second steam injection well, the 3rd use well, described the
Being provided with Stratified Waterflooding in one steam injection well, the second steam injection well, described Stratified Waterflooding can at least wear
Cross first object oil reservoir and the second target oil reservoir, and the permeability of described first object oil reservoir is higher than described second
Target oil reservoir, described Stratified Waterflooding includes:
Sleeve pipe, its be provided with for described first object oil reservoir, the second target oil reservoir be respectively communicated with first
Perforated interval, the second perforated interval；
Being set in the oil pipe in described sleeve pipe, described oil pipe forms oil jacket annular space with sleeve pipe；
The first distributor of being connected in turn on described oil pipe along gravity direction, the second distributor；
It is disposed with the first steam injection packer, the second steam injection envelope along gravity direction in described oil jacket annular space
Every device, the 3rd steam injection packer；
Described first perforated interval can be insulated by described first steam injection packer, the second steam injection packer；
Described second perforated interval can be insulated by described second steam injection packer, the 3rd steam injection packer；
Described first distributor is between described first steam injection packer and the second steam injection packer；
Described second distributor is between described second steam injection packer and the 3rd steam injection packer.
In a preferred embodiment, described oil pipe is additionally provided with telescoping tube.
In a preferred embodiment, on the oil pipe between described telescoping tube and described first steam injection packer also
It is provided with storm valve.
In a preferred embodiment, described first distributor is provided with first and joins vapour lock, and described first joins vapour
The height of mouth is positioned at first object oil reservoir, and its aperture scalable；Described second distributor is provided with second
Joining vapour lock, described second height joining vapour lock is positioned at the second target oil reservoir, and its aperture scalable.
In a preferred embodiment, the permeability of described first object oil reservoir is more than 1000 × 10-3um2；Institute
State the permeability of the second target oil reservoir 10 × 10-3um2To 100 × 10-3um2Between.
Feature of the present utility model and advantage be: described injection and extraction system is the most asynchronous injection and extraction system, and it is flat
On face, it is possible to change and inject the fixing steam flow direction formed when steam stablized steam injection in oil reservoir originally, carry
In high plane secondary by efficacious prescriptions to development degree, the crude oil in high oil saturation district is displaced.In longitudinal direction, layer
Interior aspect, gives full play to pore system as steam supply and the favorable factor of oil flow channel, utilize displacement pressure reduction,
The compression of substrate sillar and expansion, capillary imbibition effect etc., promote crude oil to flow to pore system from substrate sillar,
Improve hypotonic, high-drag passage development degree in longitudinal upper strata；Interlayer aspect, some vapor will be in additional pressure
Under the effect of the field of force and capillary force, the oil of low-permeability layer is driven onto high permeability formation, improves low-permeability layer development degree.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of Stratified Waterflooding in the application embodiment；
Fig. 2 is the distribution schematic diagram of a kind of injection and extraction system in the application embodiment.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is elaborated, should
Understand that these embodiments are merely to illustrate this utility model rather than limit scope of the present utility model, readding
After having read this utility model, those skilled in the art are equal to the amendment of the various equivalent form of values of the present utility model
Fall in the application claims limited range.
It should be noted that when element is referred to as " being arranged at " another element, and it can be directly at another
On individual element or element placed in the middle can also be there is.When an element is considered as " connection " another yuan
Part, it can be directly to another element or may be simultaneously present centering elements.Used herein
Term " vertical ", " level ", " on ", D score, "left", "right" and similar
Statement for illustrative purposes only, being not offered as is unique embodiment.
Unless otherwise defined, all of technology used herein and scientific terminology and the technology belonging to the application
The implication that the technical staff in field is generally understood that is identical.Art used in the description of the present application herein
Language is intended merely to describe the purpose of specific embodiment, it is not intended that in limiting the application.
This utility model provides a kind of Stratified Waterflooding and injection and extraction system, it is possible to be used for improving steam drive reservoir
Development degree, Remaining Oil.
Referring to Fig. 1, the application embodiments, provides a kind of Stratified Waterflooding, described layer steam injection
Tubing string can at least be fed through first object oil reservoir and the second target oil reservoir, and the infiltration of described first object oil reservoir
Rate is higher than described second target oil reservoir.Described Stratified Waterflooding may include that sleeve pipe 11, and it is provided with use
In first perforated interval the 111, second perforation being respectively communicated with described first object oil reservoir, the second target oil reservoir
Section 112；Being set in the oil pipe 12 in described sleeve pipe 11, described oil pipe 12 forms oil jacket annular space with sleeve pipe 11；
First distributor the 16, second distributor 18 of being connected in turn on described oil pipe 12 along gravity direction, the end
Portion's ball seat 10；In described oil jacket annular space along gravity direction be disposed with the first steam injection packer 15,
Two steam injection packer the 17, the 3rd steam injection packers 19；Described first steam injection packer the 15, second steam injection envelope
Described first perforated interval 111 can be insulated every device 17；Described second steam injection packer the 17, the 3rd note
Described second perforated interval 112 can be insulated by vapour packer 19；Described first distributor 16 is positioned at described
Between first steam injection packer 15 and the second steam injection packer 17；Described second distributor 18 is positioned at described
Between two steam injection packers 17 and the 3rd steam injection packer 19.
In the present embodiment, described first object oil reservoir can be high permeability formation.Concrete, described first mesh
The permeability of mark oil reservoir is more than 1000 × 10-3um2.Described second target oil reservoir can be low-permeability layer, i.e. needs
The oil reservoir taped the latent power.Concrete, the permeability of described second target oil reservoir is 10 × 10-3um2To 100 × 10-3um2
Between.Certainly, not limit position above-mentioned for the permeability range of described first object oil reservoir and the second target oil reservoir
The scope specified, the application does not make considered critical at this.
In the present embodiment, on gravity direction, described first object oil reservoir may be located at described
The top of two target oil reservoirs.Additionally, described first object oil reservoir can also be positioned at described second target oil reservoir
Height and position the application of top, i.e. Thief zone and low-permeability layer does not make concrete restriction.Additionally, wait to tap the latent power
Oil reservoir in number the application of target oil reservoir the most do not make concrete restriction at this, such as, oil reservoir to be taped the latent power can
At least to include two oil reservoirs with permeability contrast.
In the present embodiment, by steam injection packer, each oil reservoir can be separated, in order to layering note
The carrying out of vapour exploitation.
When including a high permeability formation, a low-permeability layer wait the oil reservoir taped the latent power, described sleeve pipe 11 is provided with use
In the first perforated interval 111 being connected with described high permeability formation, the second perforated interval being connected with described low-permeability layer
112.It is disposed with first steam injection packer the 15, second note along gravity direction in described oil jacket annular space
Vapour packer the 17, the 3rd steam injection packer 19.Described first steam injection packer the 15, second steam injection packer
Described first perforated interval 111 can be insulated by 17；Described second steam injection packer the 17, the 3rd steam injection packing
Described second perforated interval 112 can be insulated by device 19.To sum up, each steam injection packer described is arranged on respectively
Between pay zone unit, it is possible to high permeability formation is effectively separated with low-permeability layer, it is achieved the closure of pay zone unit.
Additionally, when described include multiple pay zone unit wait the oil reservoir taped the latent power time, such as when more than 3, described
More than the number of described pay zone unit one of the number of steam injection packer.
In the present embodiment, described first distributor 16 is positioned at described first steam injection packer 15 and second
Between steam injection packer 17；On the one hand it can connect with oil pipe 12；On the other hand, it is in unlatching when it
During state, can be connected with first object oil reservoir by the first perforated interval 111 on sleeve pipe 11.Described
Two distributors 18 are between described second steam injection packer 17 and the 3rd steam injection packer 19, and it is on the one hand
Can connect with oil pipe 12；On the other hand, when it is in opening, by second on sleeve pipe 11
Perforated interval 112 can be connected with the second target oil reservoir.
In one embodiment, described first distributor 16 is provided with first and joins vapour lock, and described first joins vapour
The height of mouth is positioned at first object oil reservoir, and its aperture scalable；Described second distributor 18 is provided with
Two join vapour lock, and described second height joining vapour lock is positioned at the second target oil reservoir, and its aperture scalable.Its
Described in the structure of first distributor the 16, second distributor 18 can be identical, represent institute with distributor below
State the first distributor 16 or the second distributor 18.
In the present embodiment, described distributor can be belt switch distributor, when actually used, injection allocation
Device can switch on by control or cut out, and is stopped note by effect vapour well, secondary is subject to reaching in plane main
Effect vapour well steam injection, in longitudinal direction, high permeability formation stops noting the purpose of low-permeability layer steam injection.It addition, join by controlling distributor
The size of vapour lock, it is achieved the control of unit oil reservoir steam injection amount, reaches to be layered on-demand steam injection, improves longitudinal upper strata
Interior hypotonic, the purpose of high-drag passage development degree.
In the present embodiment, described bottom ball seat 10, for supporting the use with described packer, is used for ensureing
Packer, when going into the well, opens backwash passage in well under the pressure differential of bottom ball seat 10, to carry out backwash.
In one embodiment, described oil pipe 12 can be additionally provided with telescoping tube 13.
In the present embodiment, described telescoping tube 13 can be arranged on the top of described oil pipe 12, near well
The position of mouth.Owing to needing to inject high-temperature steam in described Stratified Waterflooding, pipe temperature changes greatly,
Extraction duct is compensated for axially, laterally, angularly by arranging described telescoping tube 13 on oil pipe 12
Thermal deformation；Absorption equipment vibrates, and reduces the vibration equipment impact on pipeline；Absorb earthquake, earth subsidence to pipeline
Deflection.
In one embodiment, the oil pipe between described telescoping tube 13 and described first steam injection packer 15
Storm valve 14 it is additionally provided with on 12.
In the present embodiment, described storm valve 14 can be arranged on described telescoping tube 13 and the first steam injection
Between packer 15.Described storm valve 14 may be used for controlling downhole fluid.Such as, at lift pipe string
Time, if drop-in sand card, tubing string can be implemented by described storm valve 14 and disengage, then by de-
Open tubular column carries out sand washing；After punching sand, salvage the first steam injection packer 15 with lower part.
Referring to Fig. 2, additionally provide a kind of injection and extraction system in the application embodiment, it may include that first
Steam injection well the 1, second steam injection well the 3, the 3rd uses well 2.In described first steam injection well the 1, second steam injection well 3
Being provided with Stratified Waterflooding, described Stratified Waterflooding can at least be fed through first object oil reservoir and the second mesh
Mark oil reservoir, and the permeability of described first object oil reservoir is higher than described second target oil reservoir.
In the present embodiment, described first steam injection well 1 can be main by efficacious prescriptions to steam injection well, this steam injection well
And the connectedness between producing well is preferably.Described second steam injection well 3 can be secondary by efficacious prescriptions to steam injection well,
Connectedness between this steam injection well and producing well is poor.Certainly, described first steam injection well 1 or the second steam injection
Number the application of well 3 does not make concrete restriction at this, can have secondary in an oil reservoir to be taped the latent power
By efficacious prescriptions to steam injection well or multiple main by efficacious prescriptions to steam injection well.
Described Stratified Waterflooding may include that sleeve pipe 11, its be provided with for described first object oil reservoir,
First perforated interval the 111, second perforated interval 112 that second target oil reservoir is respectively communicated with；It is set in described sleeve pipe
Oil pipe 12 in 11, described oil pipe 12 forms oil jacket annular space with sleeve pipe 11；It is sequentially connected with along gravity direction
First distributor the 16, second distributor 18 on described oil pipe 12, bottom ball seat 10；At described oil jacket
It is disposed with first steam injection packer the 15, second steam injection packer the 17, the 3rd along gravity direction in annular space
Steam injection packer 19；Described first steam injection packer the 15, second steam injection packer 17 can be penetrated described first
Hole section 111 insulates；Described second steam injection packer 17, the 3rd steam injection packer 19 can be by described
Two perforated intervals 112 insulate；Described first distributor 16 is positioned at described first steam injection packer 15 and
Between two steam injection packers 17；Described second distributor 18 is positioned at described second steam injection packer 17 and the 3rd
Between steam injection packer 19.
In the present embodiment, described first object oil reservoir can be high permeability formation.Concrete, described first mesh
The permeability of mark oil reservoir is more than 1000 × 10-3um2.Described second target oil reservoir can be low-permeability layer, i.e. needs
The oil reservoir taped the latent power.Concrete, the permeability of described second target oil reservoir is 10 × 10-3um2To 100 × 10-3um2
Between.Certainly, not limit position above-mentioned for the permeability range of described first object oil reservoir and the second target oil reservoir
The scope specified, the application does not make considered critical at this.
In the present embodiment, on gravity direction, described first object oil reservoir may be located at described
The top of two target oil reservoirs.Additionally, described first object oil reservoir can also be positioned at described second target oil reservoir
Height and position the application of top, i.e. Thief zone and low-permeability layer does not make concrete restriction.Additionally, wait to tap the latent power
Oil reservoir in number the application of target oil reservoir the most do not make concrete restriction at this, such as, oil reservoir to be taped the latent power can
At least to include two oil reservoirs with permeability contrast.
In the present embodiment, by steam injection packer, each oil reservoir can be separated, in order to layering note
The carrying out of vapour exploitation.
When including a high permeability formation, a low-permeability layer wait the oil reservoir taped the latent power, described sleeve pipe 11 is provided with use
In the first perforated interval 111 being connected with described high permeability formation, the second perforated interval being connected with described low-permeability layer
112.It is disposed with first steam injection packer the 15, second note along gravity direction in described oil jacket annular space
Vapour packer the 17, the 3rd steam injection packer 19.Described first steam injection packer the 15, second steam injection packer
Described first perforated interval 111 can be insulated by 17；Described second steam injection packer the 17, the 3rd steam injection packing
Described second perforated interval 112 can be insulated by device 19.To sum up, each steam injection packer described is arranged on respectively
Between pay zone unit, it is possible to high permeability formation is effectively separated with low-permeability layer, it is achieved the closure of pay zone unit.
Additionally, when described include multiple pay zone unit wait the oil reservoir taped the latent power time, such as when more than 3, described
More than the number of described pay zone unit one of the number of steam injection packer.
In the present embodiment, described first distributor 16 is positioned at described first steam injection packer 15 and second
Between steam injection packer 17；On the one hand it can connect with oil pipe 12；On the other hand, it is in unlatching when it
During state, can be connected with first object oil reservoir by the first perforated interval 111 on sleeve pipe 11.Described
Two distributors 18 are between described second steam injection packer 17 and the 3rd steam injection packer 19, and it is on the one hand
Can connect with oil pipe 12；On the other hand, when it is in opening, by second on sleeve pipe 11
Perforated interval 112 can be connected with the second target oil reservoir.
In one embodiment, described first distributor 16 is provided with first and joins vapour lock, and described first joins vapour
The height of mouth is positioned at first object oil reservoir, and its aperture scalable；Described second distributor 18 is provided with
Two join vapour lock, and described second height joining vapour lock is positioned at the second target oil reservoir, and its aperture scalable.Its
Described in the structure of first distributor the 16, second distributor 18 can be identical, represent institute with distributor below
State the first distributor 16 or the second distributor 18.
In the present embodiment, described distributor can be belt switch distributor, when actually used, injection allocation
Device can switch on by control or cut out, and is stopped note by effect vapour well, secondary is subject to reaching in plane main
Effect vapour well steam injection, in longitudinal direction, high permeability formation stops noting the purpose of low-permeability layer steam injection.It addition, join by controlling distributor
The size of vapour lock, it is achieved the control of unit oil reservoir steam injection amount, reaches to be layered on-demand steam injection, improves longitudinal upper strata
Interior hypotonic, the purpose of high-drag passage development degree.
In the present embodiment, described bottom ball seat 10, for supporting the use with described packer, is used for ensureing
Packer, when going into the well, opens backwash passage in well under the pressure differential of bottom ball seat 10, to carry out backwash.
In one embodiment, described oil pipe 12 can be additionally provided with telescoping tube 13.
In the present embodiment, described telescoping tube 13 can be arranged on the top of described oil pipe 12, near well
The position of mouth.Owing to needing to inject high-temperature steam in described Stratified Waterflooding, pipe temperature changes greatly,
Extraction duct is compensated for axially, laterally, angularly by arranging described telescoping tube 13 on oil pipe 12
Thermal deformation；Absorption equipment vibrates, and reduces the vibration equipment impact on pipeline；Absorb earthquake, earth subsidence to pipeline
Deflection.
In one embodiment, the oil pipe between described telescoping tube 13 and described first steam injection packer 15
Storm valve 14 it is additionally provided with on 12.
In the present embodiment, described storm valve 14 can be arranged on described telescoping tube 13 and the first steam injection
Between packer 15.Described storm valve 14 may be used for controlling downhole fluid.Such as, at lift pipe string
Time, if drop-in sand card, tubing string can be implemented by described storm valve 14 and disengage, then by de-
Open tubular column carries out sand washing；After punching sand, salvage the first steam injection packer 15 with lower part.
Described injection and extraction system is when actually used, and work process is as follows:
(1) mainly note, minor direction steam injection well steam injection, Production Wells are stopped by efficacious prescriptions to steam injection well.Close
By efficacious prescriptions first distributor 16 and second distributor 18 of high permeability formation in steam injection well post, open minor direction
First distributor 16 and the second distributor 18 of high permeability formation in steam injection well post.Close the steam injection played a major role
Well, maintains the production of the steam injection well played a secondary role, is equivalent to strengthen minor direction steam injection, in a disguised form reduces
The bottom pressure of producing well, in stagnant area, remaining oil will move to minor direction steam injection well, and these part reserves will
Employed, improved oil displacement efficiency, reached purpose of taping the latent power.
(2) high permeability formation stops note, low-permeability layer steam injection, Production Wells.Close the first injection allocation in steam injection well post
Device 16, opens the second distributor 18 in steam injection well post.Relatively add the steam injection amount of low-permeability layer, expand low
The infiltration layer displacement of reservoir oil involves scope, thus increases the reserves exploitation degree of low-permeability layer.
(3) steam injection well steam injection, producing well is closed down.Open the first distributor 16 and second in steam injection well post
Distributor 18.In steam injection process, strata pressure raises so that pre-existent pore is expanded and extended；At note
Under the dual function of steam pressure and capillary pressure, part is injected steam and is entered the relatively low oil reservoir of permeability and base
In the oil-containing hole of matter sillar deep part, expand displacement of reservoir oil swept volume.
(4) steam injection well stops note, and producing well is closed down.Close the first distributor 16 and second in steam injection well post
Distributor 18.Close down steam injection well and producing well simultaneously, new pressure balance field, beneficially imbibition can be set up
Effect is carried out more fully.Aspect in layer, oil replaces hole from substrate；Interlayer aspect, the oil of low-permeability layer
It is driven onto high permeability formation, thus realizes the exchange of low high permeability area fluid.
(5) steam injection well stops note, Production Wells.Close the first distributor 16 and second in steam injection well post
Distributor 18.After oil and gas divides different a period of time, oil well reproduces, and the pressure reduction existed between hole and substrate sillar accelerates
The oil extraction effect of capillary imbibition, under displacement pressure reduction and capillary imbibition effect, makes more entrance substrate sillar
In injection steam be detained to get off, thus replace out the crude oil access aperture slot sytem of equivalent.
In the application embodiment, described injection and extraction system is the most asynchronous injection and extraction system, its in the plane, energy
Enough change injects the fixing steam flow direction formed when steam stablized steam injection in oil reservoir originally, improves in plane
Secondary by efficacious prescriptions to development degree, the crude oil in high oil saturation district is displaced.In longitudinal direction, aspect in layer,
Give full play to pore system as steam supply and the favorable factor of oil flow channel, utilize displacement pressure reduction, substrate sillar
Compression and expansion, capillary imbibition effect etc., promote crude oil to flow to pore system from substrate sillar, improve longitudinally
Hypotonic, high-drag passage development degree in upper strata；Interlayer aspect, some vapor will in additonal pressure field and
Under the effect of capillary force, the oil of low-permeability layer is driven onto high permeability formation, improves low-permeability layer development degree.
Each embodiment above-mentioned in this specification all uses the mode gone forward one by one to describe, each embodiment it
Between identical similar portion cross-referenced, what each embodiment stressed is and other embodiments
Difference.
The foregoing is only several embodiment of the present utility model, although the embodiment party disclosed by this utility model
As above, but described content is only to facilitate the embodiment that understands this utility model and use, not uses for formula
In limiting this utility model.Any this utility model person of ordinary skill in the field, without departing from this reality
On the premise of novel disclosed spirit and scope, can in form and appointing in details at embodiment
What amendment and change, but scope of patent protection of the present utility model, still must be with appended claims institute circle
Fixed in the range of standard.
Claims (10)
1. a Stratified Waterflooding, it is characterised in that described Stratified Waterflooding can at least be fed through first
Target oil reservoir and the second target oil reservoir, and the permeability of described first object oil reservoir is higher than described second target oil
Layer, described Stratified Waterflooding includes:
Sleeve pipe, its be provided with for described first object oil reservoir, the second target oil reservoir be respectively communicated with first
Perforated interval, the second perforated interval；
Being set in the oil pipe in described sleeve pipe, described oil pipe forms oil jacket annular space with sleeve pipe；
The first distributor of being connected in turn on described oil pipe along gravity direction, the second distributor, bottom ball
Seat；
It is disposed with the first steam injection packer, the second steam injection envelope along gravity direction in described oil jacket annular space
Every device, the 3rd steam injection packer；
Described first perforated interval can be insulated by described first steam injection packer, the second steam injection packer；
Described second perforated interval can be insulated by described second steam injection packer, the 3rd steam injection packer；
Described first distributor is between described first steam injection packer and the second steam injection packer；
Described second distributor is between described second steam injection packer and the 3rd steam injection packer.
2. Stratified Waterflooding as claimed in claim 1, it is characterised in that be additionally provided with on described oil pipe
Telescoping tube.
3. Stratified Waterflooding as claimed in claim 2, it is characterised in that described telescoping tube and described the
It is additionally provided with storm valve on oil pipe between one steam injection packer.
4. Stratified Waterflooding as claimed in claim 1, it is characterised in that:
Described first distributor is provided with first and joins vapour lock, and described first height joining vapour lock is positioned at first object
In oil reservoir, and its aperture scalable；
Described second distributor is provided with second and joins vapour lock, and described second height joining vapour lock is positioned at the second target
In oil reservoir, and its aperture scalable.
5. Stratified Waterflooding as claimed in claim 1, it is characterised in that:
The permeability of described first object oil reservoir is more than 1000 × 10-3um2；
The permeability of described second target oil reservoir is 10 × 10-3um2To 100 × 10-3um2Between.
6. an injection and extraction system, it is characterised in that comprising: the first steam injection well, the second steam injection well, the 3rd
Use well, in described first steam injection well, the second steam injection well, be provided with Stratified Waterflooding, described layer steam injection
Tubing string can at least be fed through first object oil reservoir and the second target oil reservoir, and the infiltration of described first object oil reservoir
Rate is higher than described second target oil reservoir, and described Stratified Waterflooding includes:
Sleeve pipe, its be provided with for described first object oil reservoir, the second target oil reservoir be respectively communicated with first
Perforated interval, the second perforated interval；
Being set in the oil pipe in described sleeve pipe, described oil pipe forms oil jacket annular space with sleeve pipe；
The first distributor of being connected in turn on described oil pipe along gravity direction, the second distributor；
It is disposed with the first steam injection packer, the second steam injection envelope along gravity direction in described oil jacket annular space
Every device, the 3rd steam injection packer；
Described first perforated interval can be insulated by described first steam injection packer, the second steam injection packer；
Described second perforated interval can be insulated by described second steam injection packer, the 3rd steam injection packer；
Described first distributor is between described first steam injection packer and the second steam injection packer；
Described second distributor is between described second steam injection packer and the 3rd steam injection packer.
7. injection and extraction system as claimed in claim 6, it is characterised in that be additionally provided with flexible on described oil pipe
Pipe.
8. injection and extraction system as claimed in claim 7, it is characterised in that described telescoping tube and described first note
It is additionally provided with storm valve on oil pipe between vapour packer.
9. injection and extraction system as claimed in claim 6, it is characterised in that:
Described first distributor is provided with first and joins vapour lock, and described first height joining vapour lock is positioned at first object
In oil reservoir, and its aperture scalable；
Described second distributor is provided with second and joins vapour lock, and described second height joining vapour lock is positioned at the second target
In oil reservoir, and its aperture scalable.
10. injection and extraction system as claimed in claim 6, it is characterised in that:
The permeability of described first object oil reservoir is more than 1000 × 10-3um2；
The permeability of described second target oil reservoir is 10 × 10-3um2To 100 × 10-3um2Between.
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| CN201620504282.3U CN205778790U (en) | 2016-05-30 | 2016-05-30 | Layered steam injection pipe column and injection and production system |
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| CN114922595A (en) * | 2022-05-09 | 2022-08-19 | 中国地质大学（北京） | Oil extraction method and oil extraction system thereof |
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