CN209892171U - Horizontal well section staggered displacement and imbibition displacement injection-production string - Google Patents
Horizontal well section staggered displacement and imbibition displacement injection-production string Download PDFInfo
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- CN209892171U CN209892171U CN201822246258.6U CN201822246258U CN209892171U CN 209892171 U CN209892171 U CN 209892171U CN 201822246258 U CN201822246258 U CN 201822246258U CN 209892171 U CN209892171 U CN 209892171U
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Abstract
The utility model discloses a crisscross displacement of horizontal well section and imbibition displacement of reservoir oil injection production tubular column, including the injection string and the extraction tubular column that are parallel to each other, the injection string includes a plurality of intelligence injection mandrel on first connection oil pipe and the first connection oil pipe, the extraction tubular column includes that the second connects a plurality of constant pressure valve on oil pipe and the second connection oil pipe, be provided with the parallel double-barrelled packer of a plurality of on first connection oil pipe and the second connection oil pipe, parallel double-barrelled packer separates the horizontal perforation section of injection string and extraction tubular column for a plurality of packing sections, a packing section of interval between per two intelligence injection mandrel, a packing section of interval between per two constant pressure valve, and the constant pressure valve is in the packing section between two intelligence injection mandrel. By injecting water into one section of the adjacent packing section and extracting oil in one section, and adopting an energy supplement mode of staggered displacement and imbibition displacement between the sections, linear water injection is realized, the water injection pressure is reduced, and the risk of fractured flooding is reduced.
Description
Technical Field
The utility model relates to an oil field horizontal well development field horizontal well oil recovery technique especially relates to a crisscross displacement of horizontal well section and imbibition displacement of reservoir oil notes tubular column.
Background
With the progress of the horizontal well development technology, the number of low-permeability oil production wells in the horizontal well oil production technology is greatly increased, the flow conductivity is improved by adopting segmented multi-cluster fracturing modification, and the stratum energy exploitation is supplemented by water injection exploitation. The horizontal section is longer, the water drive effect in the middle of the horizontal section is poor, and the yield contribution rate is low. Meanwhile, part of wells are influenced by the development of reservoir microcracks and water injection development, injected water enters along the fractures along with the extension of development time, so that the risk of fractured flooding is easily caused, the loss of productivity and reserves is serious, and the low-water-content oil extraction period is short.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a crisscross displacement of horizontal well section and imbibition displacement of reservoir oil notes production string changes linear water injection into by punctiform water injection, further promotes long horizontal segment horizontal well middle and later stage energy replenishment level, avoids the natural crack secondary that natural crack produced at the water injection in-process to open, reduces fissured water logging risk, improves the whole development effect of horizontal well.
The utility model provides a crisscross displacement of horizontal well section and imbibition displacement of reservoir oil injection production tubular column, including the injection string and the extraction tubular column that are parallel to each other, the injection string includes a plurality of intelligence injection mandrel on first connecting oil pipe and the first connecting oil pipe, the extraction tubular column includes that the second connects a plurality of constant pressure valve on oil pipe and the second, first connecting oil pipe and second are connected and are provided with the parallel double-barrelled packer of a plurality of on the oil pipe, parallel double-barrelled packer separates the horizontal perforation section of injection string and extraction tubular column for a plurality of packing sections, a packing section in interval between per two intelligence injection mandrel, a packing section in interval between per two constant pressure valve, and the constant pressure valve is in the packing section between two intelligence injection mandrel.
Furthermore, the tail ends of the injection pipe column and the extraction pipe column are provided with guide screw plugs.
Furthermore, a supporting valve and an oil well pump are further arranged on the second connecting oil pipe, the supporting valve is connected with the lower portion of the oil well pump, and the supporting valve is connected with the parallel double-pipe packer through the second connecting oil pipe.
Further, each of the packer sections is provided with a perforation.
Furthermore, the number of the parallel double-pipe packers is two, the first connecting oil pipe and the second connecting oil pipe are divided into an odd number packing section and an even number packing section, the intelligent water distributor is located on the odd number packing section of the injection pipe column, and the constant pressure valve is located on the even number packing section of the extraction pipe column.
Further, each odd packer section and each even packer section are provided with a perforation.
The beneficial effects of the utility model reside in that: the method comprises the steps of adopting two sets of tubular columns for extraction and injection, utilizing parallel double-tube packers to divide a horizontal perforation section of the extraction tubular column and a horizontal perforation section of the injection tubular column into a plurality of odd number packing sections and even number packing sections, adopting a mode of oil extraction at the odd number section of the extraction tubular column and water injection at the even number section of the injection tubular column, or adopting a mode of oil extraction at the even number section of the extraction tubular column and water injection at the odd number section of the injection tubular column, and adopting an energy supplement mode of staggered displacement and imbibition displacement between sections to realize linear. Under the condition that the water injection amount is the same, the water injection pressure is reduced, secondary opening of natural cracks generated in the water injection process of the natural cracks is avoided, and the risk of fractured flooding is reduced.
Drawings
The present invention will be described in further detail with reference to the following drawings and examples:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is the well pattern structure schematic diagram of the utility model.
In the figure 1, a guide screw plug; 2. odd number of seal segments; 3. perforating; 4. a first connecting oil pipe; 5. a parallel double-pipe packer; 6. a constant pressure valve; 7. a seal section; 8. an intelligent water distributor; 9. a second connecting oil pipe; 10. a support valve; 11. an oil well pump; 12. extracting the tubular column; 13. injecting the mixture into a tubular column; 14. an even number of packer sections.
Detailed Description
[ example 1 ]
As shown in fig. 1, a staggered displacement and imbibition displacement injection-production string for horizontal well sections, which comprises an injection string 13 and an extraction string 12 which are parallel to each other, wherein the injection string 13 comprises a first connecting oil pipe 4 and a plurality of intelligent water distributors 8 arranged on the first connecting oil pipe 4, the extraction string 12 comprises a second connecting oil pipe 9 and a plurality of constant pressure valves 6 arranged on the second connecting oil pipe 9, the first connecting oil pipe 4 and the second connecting oil pipe 9 are provided with a plurality of parallel double-pipe packers 5, the parallel double-pipe packers 5 separate the horizontal perforation sections of the injection string 13 and the extraction string 12 into a plurality of packing sections 7, one packing section 7 is arranged between every two intelligent water distributors 8, one packing section 7 is arranged between every two constant pressure valves 6, and the constant pressure valves 6 are arranged in the packing section 7 between the two intelligent water distributors 8.
The injection pipe column 13 and the production pipe column 12 are put into a horizontal well, the injection pipe column 13 comprises a first connecting oil pipe 4, one end of the first connecting oil pipe is connected with a well head, the other end of the first connecting oil pipe is lifted into the well bottom, a plurality of water distributors 8 only are arranged on the first connecting oil pipe 4, and the injection pipe column 13 is used for injecting water into the well. The production pipe column 12 comprises a second connecting oil pipe 9 with one end connected with the wellhead and the other end rising into the shaft bottom, a plurality of constant pressure valves 6 are arranged on the second connecting oil pipe 9, the production pipe column 13 is used for producing oil in the shaft bottom to the ground, and the constant pressure valves 6 are used for enabling the oil to enter the production pipe column when being opened.
Still be equipped with the parallel double-barrelled packer 5 of a plurality of on first connecting oil pipe 4 and the second connecting oil pipe 9, parallel double-barrelled packer 5 separates the part that has perforation 3 in the shaft bottom horizontal segment for a plurality of packing section 7, a plurality of constant pressure valve 6 on the extraction tubular column 12, interval packing section 7 sets up between per two constant pressure valve 6, and intelligent water distributor 8 also sets up according to interval packing section 7 between per two intelligent water distributor 8, and intelligent water distributor 8 is located that interval packing section 7 between two constant pressure valve 6. Thus, only one constant pressure valve 6 or 1 water distributor 8 can be arranged in each sealing section.
And guide plugs 1 are arranged at the tail ends of the injection pipe column 13 and the extraction pipe column 12. For sealing the injection string 13 and the production string 12.
And the second connecting oil pipe 9 is also provided with a supporting valve 10 and an oil well pump 11, the supporting valve 10 is connected with the lower part of the oil well pump 11, and the supporting valve 10 is connected with the parallel double-pipe packer 5 through the second connecting oil pipe 9. For lifting the oil flowing from the constant pressure valve 6 into the production string 12 to the surface.
Each of the packer sections 7 is provided with perforations 3. For oil in the formation to flow into the string and be lifted to the surface by the production string 12.
As shown in fig. 2, a plurality of production strings 12 and a plurality of injection strings 13 may be simultaneously operated downhole, the horizontal section where the production string 12 is located is an oil production section, the horizontal section where the injection string 13 is located is a water injection section, and the plurality of production strings 12 and the plurality of injection strings 13 are distributed at intervals, and linear water injection is realized between every two injection strings 13 by adopting an energy supplement manner of staggered displacement and imbibition displacement between sections for the production string 12.
[ example 2 ]
As shown in fig. 1, there are two parallel double packers 5, and the first connecting oil pipe 4 and the second connecting oil pipe 9 are divided into an odd number packer section 2 and an even number packer section 14, the intelligent water distributor 8 is located on the odd number packer section 2 of the injection string 13, and the constant pressure valve 6 is located on the even number packer section 14 of the production string 12.
The two parallel double-tube packers 5 divide the first connecting oil tube 4 and the second connecting oil tube 9 equally into three sections, two odd number packer sections 2 and one even number packer section 14. The even number packing section 14 is positioned between the two odd number packing sections 2, the injection pipe columns 13 in the two odd number packing sections 2 are both provided with intelligent water distributors 8, and the injection pipe columns 13 in the even number packing section 14 are not provided with the intelligent water distributors 8; no constant pressure valve 6 is arranged on the production pipe columns 12 in the two odd number packing sections 2, and an intelligent constant pressure valve 6 is arranged on the production pipe columns 12 in the even number packing sections 14.
At this time, the odd number packing sections 2 are charged with water by the intelligent water distributor 8, and the even number packing sections 14 are charged with oil into the extraction pipe column 12 by the constant pressure valve 6. Realize water injection at odd number section and oil extraction at even number section
Each of the odd and even packer sections 2, 14 is provided with perforations 3.
When the device is used, the injection pipe column 13 and the extraction pipe column 12 are lowered to corresponding positions in a well according to section number requirements and spacing requirements, then a plurality of parallel double-pipe packers 5 are lowered to corresponding positions in the well, so that each isolation section 7 separated by the parallel double-pipe packers 5 is provided with a perforation 3, and each isolation section 7 is provided with an intelligent water distributor 8 or a constant pressure valve 6.
And then, a cement truck is used for pressurizing 20MPa from the well head, the pressure in the pipe is suppressed, so that the parallel double-pipe packer 5 is set, the pressure is continuously pressurized to 25MPa, and the constant pressure valve 6 is opened so that the even number of oil extraction sections are communicated with the extraction pipe column 12.
Then, a pump rod of an oil well pump is put in through a well mouth to impact a steel ball of a support valve 10, so that the steel ball enters a ball seat, the ground oil pumping unit continuously produces, and ground injection water is injected into odd sections through an injection pipe column 13 below the well mouth through an intelligent water distributor 8. The energy supplement modes of oil extraction at even sections, water injection at odd sections, staggered displacement between sections and imbibition displacement are realized, and linear water injection is realized.
[ example 3 ]
The utility model provides a crisscross displacement of horizontal well section and imbibition displacement of reservoir oil injection production tubular column, including injection string 13 and the extraction tubular column 12 that are parallel to each other, injection string 13 includes a plurality of intelligence injection mandrel 8 on first connecting oil pipe 4 and the first connecting oil pipe 4, extraction tubular column 12 includes a plurality of constant pressure valve 6 on second connecting oil pipe 9 and the second connecting oil pipe 9, be provided with a plurality of parallel double-barrelled packer 5 on first connecting oil pipe 4 and the second connecting oil pipe 9, parallel double-barrelled packer 5 separates the horizontal perforation section of injection mandrel 13 and extraction tubular column 12 for a plurality of packing section 7, packing section 7 at interval between per two intelligence injection mandrel 8, packing section 7 at interval between per two constant pressure valve 6, and constant pressure valve 6 locates in the packing section 7 between two intelligence injection mandrel 8.
And guide plugs 1 are arranged at the tail ends of the injection pipe column 13 and the extraction pipe column 12.
And the second connecting oil pipe 9 is also provided with a supporting valve 10 and an oil well pump 11, the supporting valve 10 is connected with the lower part of the oil well pump 11, and the supporting valve 10 is connected with the parallel double-pipe packer 5 through the second connecting oil pipe 9.
Each of the packer sections 7 is provided with perforations 3.
The number of the parallel double-pipe packers 5 is two, the first connecting oil pipe 4 and the second connecting oil pipe 9 are divided into an odd number packing section 2 and an even number packing section 14, the intelligent water distributor 8 is located on the odd number packing section 2 of the injection pipe column 13, and the constant pressure valve 6 is located on the even number packing section 14 of the extraction pipe column 12.
Each of the odd and even packer sections 2, 14 is provided with perforations 3.
The specific implementation steps are as follows:
1. and (3) putting an injection-production string: firstly, according to the requirements of the number of sections and the distance between the sections, an injection pipe column 13 and a production pipe column 12 are put to corresponding positions in a well, then a plurality of parallel double-pipe packers 5 are put to corresponding positions in the well, so that each isolation section 7 separated by the parallel double-pipe packers 5 is provided with a perforation 3, and each isolation section 7 is provided with an intelligent water distributor 8 or a constant pressure valve 6. Each perforation section is guaranteed to be blocked, and each layer section level is guaranteed to be correspondingly provided with an intelligent water distributor or a constant pressure valve.
2. Setting: and then, a cement truck is used for pressurizing 20MPa from the well head, the pressure in the pipe is suppressed, so that the parallel double-pipe packer 5 is set, the pressure is continuously pressurized to 25MPa, and the constant pressure valve 6 is opened so that the even number of oil extraction sections are communicated with the extraction pipe column 12.
3. Production: then, a pump rod of an oil well pump is put in through a well mouth to impact a steel ball of a support valve 10, so that the steel ball enters a ball seat, the ground oil pumping unit continuously produces, and ground injection water is injected into odd sections through an injection pipe column 13 below the well mouth through an intelligent water distributor 8. The energy supplement modes of oil extraction at even sections, water injection at odd sections, staggered displacement between sections and imbibition displacement are realized, and linear water injection is realized.
The utility model discloses an extract and pour into two sets of tubular columns into to utilize parallel double-barrelled packer to separate the horizontal perforation section of extracting the tubular column and pouring into the tubular column for a plurality of odd number packer sections and even number packer section, adopt the oil recovery of extracting the tubular column odd number section, pour into the water injection of tubular column even number section, perhaps adopt the mode of extracting the tubular column even number section oil recovery, pouring into the water injection of tubular column odd number section, adopt the energy complementary mode of the crisscross displacement of intersegmental and imbibition displacement of reservoir oil, realize linear water injection. Under the condition that the water injection amount is the same, the water injection pressure is reduced, secondary opening of natural cracks generated in the water injection process of the natural cracks is avoided, and the risk of fractured flooding is reduced.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (6)
1. A horizontal well section staggered displacement and imbibition displacement injection-production string is characterized in that: the device comprises an injection pipe column (13) and an extraction pipe column (12) which are parallel to each other, wherein the injection pipe column (13) comprises a first connecting oil pipe (4) and a plurality of intelligent water distributors (8) on the first connecting oil pipe (4), the extraction pipe column (12) comprises a second connecting oil pipe (9) and a plurality of constant pressure valves (6) on the second connecting oil pipe (9), a plurality of parallel double-pipe packers (5) are arranged on the first connecting oil pipe (4) and the second connecting oil pipe (9), the parallel double-pipe packers (5) divide a horizontal injection hole section of the injection pipe column (13) and the extraction pipe column (12) into a plurality of isolation sections (7), one isolation section (7) is arranged between every two intelligent water distributors (8), one isolation section (7) is arranged between every two constant pressure valves (6), and the constant pressure valve (6) is positioned in the sealing section (7) between the two intelligent water distributors (8).
2. The horizontal well section staggered displacement and imbibition oil displacement injection-production string as claimed in claim 1, characterized in that: the tail ends of the injection pipe column (13) and the extraction pipe column (12) are provided with guide pipe plugs (1).
3. The horizontal well section staggered displacement and imbibition oil displacement injection-production string as claimed in claim 1, characterized in that: and the second connecting oil pipe (9) is also provided with a supporting valve (10) and an oil well pump (11), the supporting valve (10) is connected with the lower part of the oil well pump (11), and the supporting valve (10) is connected with the parallel double-pipe packer (5) through the second connecting oil pipe (9).
4. The horizontal well section staggered displacement and imbibition oil displacement injection-production string as claimed in claim 1, characterized in that: each of the packing sections (7) is provided with a perforation (3).
5. The horizontal well section staggered displacement and imbibition oil displacement injection-production string as claimed in claim 1, characterized in that: the parallel double-pipe packers (5) are two in number and divide the first connecting oil pipe (4) and the second connecting oil pipe (9) into odd number packer sections (2) and even number packer sections (14), the intelligent water distributor (8) is positioned on the odd number packer sections (2) of the injection pipe column (13), and the constant pressure valve (6) is positioned on the even number packer sections (14) of the production pipe column (12).
6. The horizontal well section staggered displacement and imbibition oil displacement injection-production string as claimed in claim 5, wherein: and each odd packing section (2) and each even packing section (14) are provided with a perforation (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822246258.6U CN209892171U (en) | 2018-12-29 | 2018-12-29 | Horizontal well section staggered displacement and imbibition displacement injection-production string |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822246258.6U CN209892171U (en) | 2018-12-29 | 2018-12-29 | Horizontal well section staggered displacement and imbibition displacement injection-production string |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653715A (en) * | 2018-12-29 | 2019-04-19 | 中国石油天然气股份有限公司 | A kind of net horizontal section interlocks displacement and imbibition displacement of reservoir oil injection-production column jacket and method |
| CN115492560A (en) * | 2021-06-18 | 2022-12-20 | 大庆油田有限责任公司 | Oil displacement process |
-
2018
- 2018-12-29 CN CN201822246258.6U patent/CN209892171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653715A (en) * | 2018-12-29 | 2019-04-19 | 中国石油天然气股份有限公司 | A kind of net horizontal section interlocks displacement and imbibition displacement of reservoir oil injection-production column jacket and method |
| CN115492560A (en) * | 2021-06-18 | 2022-12-20 | 大庆油田有限责任公司 | Oil displacement process |
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