CN202215191U - Chemical plugging tubular column for horizontal well - Google Patents
Chemical plugging tubular column for horizontal well Download PDFInfo
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- CN202215191U CN202215191U CN2011202641505U CN201120264150U CN202215191U CN 202215191 U CN202215191 U CN 202215191U CN 2011202641505 U CN2011202641505 U CN 2011202641505U CN 201120264150 U CN201120264150 U CN 201120264150U CN 202215191 U CN202215191 U CN 202215191U
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Abstract
A chemical plugging tubular column for a horizontal well is applied to chemical water plugging of a water outlet layer and a high water-containing layer of oil wells in oil field plugging. A safety connector is connected onto the lower end of an ordinary oil pipe, a fixed-pressure packing group is connected onto the lower end of the safety connector, a chamfer oil pipe is connected onto the lower end of the fixed-pressure packing group, and a conical plug is connected onto the lower end of the chamfer oil pipe. The fixed-pressure packing group is formed by connecting centering guides, a differential-pressure packer and a fixed-pressure valve, and the differential-pressure packer is arranged between two centering guides. The beneficial effect is that the chemical plugging tubular column adopts the fixed-pressure valve and the differential-pressure packer, the fixed-pressure valve can be opened under certain pressure, then differential pressure is formed between the inside and the outside of the tube, accordingly the differential-pressure packer can be sealed, and the water outlet layer and an oil layer can be separated, thereby achieving directional filling of plugging agents, reducing the harm to the oil layer caused by the plugging agents, being good in plugging effect, achieving water control and oil increasing of the horizontal well, and improving exploitation effect.
Description
Technical field
The utility model relates to the chemical water shutoff that is used for well water interval, high water-bearing interval in the oilfield process, is a kind of horizontal well chemical plugging tubing string.
Background technology
At present, long celebrating oil field each layer of Triassic system oil reservoir starting pressure gradient difference is big, and the section non-homogeneity is serious, and it is serious to inject the water phenomenon of advancing by leaps and bounds along individual layer or crack; Jurassic system bottom water reservoir exploitation horizontal well, end water ridge advances seriously.Be limited by the exceptional well body structure of horizontal well, behind the horizontal well water breakthrough as do not take measures, moisture rising is very fast, and oil production is bust thereupon, even water logging, is seriously restricting the whole development effect of horizontal well.Therefore, after horizontal well injection Shuitu is advanced or the water ridge advances at the end, should in time implement the water-plugging technology measure, control injection Shuitu advances or end water ridge advances, and could realize water-control oil-increasing, the into development effectiveness of improving the standard.But the water plugging of horizontal well technology mainly contains water pack off and chemical water shutoff at present; Water pack off technology later stage tubing string deblocking difficulty has a big risk; That is that all right at home is ripe for chemical water shutoff technology, is main with general injection plugging technology mainly, and general the injection gets into low permeability pay, and be big to the oil reservoir injury.For this reason, need directed shutoff, alleviate the injury of stifled agent, improve plugging effect oil reservoir to horizontal well water-yielding stratum or high water-bearing interval.
The utility model content
The purpose of the utility model is: a kind of horizontal well chemical plugging tubing string is provided, is used for the chemically-directed shutoff of horizontal well water-yielding stratum or high water-bearing interval, alleviate the injury of stifled agent to oil reservoir, improve plugging effect, reach the purpose of water-control oil-increasing.
The technical scheme that the utility model adopts is: horizontal well chemical plugging tubing string; Mainly form by taper plug, chamfering oil pipe, level pressure packing group, safety joint and plain tubing; The attachment security joint in the lower end of plain tubing; It is characterized in that: be connected with level pressure packing group in the lower end of safety joint, connect the chamfering oil pipe, connect the taper plug in the lower end of chamfering oil pipe in the lower end of level pressure packing group; Described level pressure packing group is formed by connecting centralizer, differential packer and constant pressure valve, and differential packer is between two centralizers.The residing position of high water-bearing interval is different, and the connected mode of level pressure packing group has three kinds.
When high water-bearing interval at the horizontal well front end; Oil reservoir is in high water-bearing interval bottom; The stratum is when the oil reservoir bottom: level pressure packing group mainly is made up of a constant pressure valve, two centralizers and a differential packer, and constant pressure valve is connected the bottom of safety joint through the chamfering oil pipe, connects first centralizer in the bottom of constant pressure valve through the chamfering oil pipe; Connect differential packer in the bottom of first centralizer, the bottom of differential packer connects second centralizer.
When the stratum at the horizontal well front end; High water-bearing interval is in the bottom on stratum, and oil reservoir is when high water-bearing interval bottom: level pressure packing group mainly is made up of a constant pressure valve, four centralizers and two differential packers, and first centralizer is connected the bottom of safety joint through the chamfering oil pipe; First centralizer connects the first differential packer; The lower end of the first differential packer connects second centralizer, and the lower end of second centralizer connects constant pressure valve through the chamfering oil pipe, and the lower end of constant pressure valve connects the 3rd centralizer through the chamfering oil pipe; The lower end of the 3rd centralizer connects the second differential packer, and the lower end of the second differential packer connects the 4th centralizer.
When the stratum at the horizontal well front end; Oil reservoir is in the bottom on stratum; When the bottom of oil reservoir was high water-bearing interval: level pressure packing group mainly was made up of a constant pressure valve, two centralizers and a differential packer, and first centralizer is connected the bottom of safety joint through the chamfering oil pipe, and first centralizer connects differential packer; The lower end of differential packer connects second centralizer, and the lower end of second centralizer connects constant pressure valve through the chamfering oil pipe.
The principle of summary horizontal well chemical plugging tubing string: during on-the-spot the use; At first according to the water detection test result of horizontal well; Analyze the water exit or the position, high aquifer of horizontal well exactly, select corresponding chemical water shutoff tubing string to the water exit or the position, high aquifer of horizontal well then; By design scheme kit is connected, behind the precalculated position, suppress through ground; Constant pressure valve is opened under certain pressure, and the inside and outside pressure reduction that forms of oil pipe makes differential packer set, and water exit interval and other oil layer section sealed clamping cleats are opened; In well, inject chemical plugging agent then on ground; Stifled agent gets into water exit interval through constant pressure valve, inject a certain amount of chemical plugging agent after, on play crowded tube sealing post.
The beneficial effect of the utility model: the utility model horizontal well chemical plugging tubing string, adopt constant pressure valve and differential packer, constant pressure valve is opened under certain pressure; Oil pipe forms pressure reduction both at home and abroad, makes differential packer set, and water exit interval and oil layer section are separated; Realize the orientation injection of stifled agent, alleviate the injury of stifled agent, and plugging effect is good oil reservoir; The well water-control oil-increasing that is up to the standard improves development effectiveness.
Description of drawings
Fig. 1 is the horizontal well chemical plugging tubular column structure generalized section of embodiment 1.
Fig. 2 is the horizontal well chemical plugging tubular column structure generalized section of embodiment 2.
Fig. 3 is the horizontal well chemical plugging tubular column structure generalized section of embodiment 3.
Among the figure, 1-taper plug, 2-chamfering oil pipe, 3-centralizer, the differential packer of 4-, 5-constant pressure valve, 6-safety joint, 7-plain tubing, 8-stratum, the high water-bearing interval of 9-.
The specific embodiment
Embodiment 1: with a horizontal well chemical plugging tubing string is example, and the utility model is done further explain.
Consult Fig. 1.When high water-bearing interval 9 at the horizontal well front end, oil reservoir is in high water-bearing interval 9 bottoms, stratum 8 is when the oil reservoir bottom: the attachment security joint 6 in the lower end of plain tubing 7, are connected with level pressure packing group in the lower end of safety joint 6.Level pressure packing group mainly is made up of a constant pressure valve 5, two centralizers 3 and a differential packer 4; Constant pressure valve 5 is connected the bottom of safety joint 6 through chamfering oil pipe 2; Bottom at constant pressure valve 5 connects first centralizer 3 through chamfering oil pipe 2; Connect differential packer 4 in the bottom of first centralizer 3, the bottom of differential packer 4 connects second centralizer 3.Lower end at second centralizer 3 connects chamfering oil pipe 2, connects taper plug 1 in the lower end of chamfering oil pipe 2.
Consult Fig. 2.When stratum 8 at the horizontal well front end, high water-bearing interval 9 is 8 bottom on the stratum, oil reservoir is when high water-bearing interval 9 bottoms: the attachment security joint 6 in the lower end of plain tubing 7, are connected with level pressure packing group in the lower end of safety joint 6.Level pressure packing group mainly is made up of a constant pressure valve 5, four centralizers 3 and two differential packers 4; First centralizer 3 is connected the bottom of safety joint 6 through chamfering oil pipe 2; First centralizer 3 connects the first differential packer 4; The lower end that the lower end of the first differential packer 4 connects second centralizer, 3, the second centralizers 3 connects constant pressure valve 5 through chamfering oil pipe 2, and the lower end of constant pressure valve 5 connects the 3rd centralizer 3 through chamfering oil pipe 2; The lower end that the lower end of the 3rd centralizer 3 connects second differential packer 4, the second differential packers 4 connects the 4th centralizer 3.Lower end at the 4th centralizer 3 connects chamfering oil pipe 2, connects taper plug 1 in the lower end of chamfering oil pipe 2.
Consult Fig. 3.When stratum 8 at the horizontal well front end, oil reservoir is 8 bottom on the stratum, when being high water-bearing interval 9 in the bottom of oil reservoir: the attachment security joint 6 in the lower end of plain tubing 7, are connected with level pressure packing group in the lower end of safety joint 6.Level pressure packing group mainly is made up of a constant pressure valve 5, two centralizers 3 and a differential packer 4; First centralizer 3 is connected the bottom of safety joint 6 through chamfering oil pipe 2; First centralizer 3 connects differential packer 4; The lower end that the lower end of differential packer 4 connects second centralizer, 3, the second centralizers 3 connects constant pressure valve 5 through chamfering oil pipe 2.Lower end at constant pressure valve 5 connects chamfering oil pipe 2, connects taper plug 1 in the lower end of chamfering oil pipe 2.
Taper plug 1, chamfering oil pipe 2, centralizer 3, differential packer 4, constant pressure valve 5 and safety joint 6 are commercially available prod, and city's field energy is purchased.
Claims (4)
1. horizontal well chemical plugging tubing string; Mainly form by taper plug (1), chamfering oil pipe (2), level pressure packing group, safety joint (6) and plain tubing (7); At the lower end of plain tubing (7) attachment security joint (6); It is characterized in that: be connected with level pressure packing group in the lower end of safety joint (6), connect chamfering oil pipe (2), connect taper plug (1) in the lower end of chamfering oil pipe (2) in the lower end of level pressure packing group; Described level pressure packing group is formed by connecting centralizer (3), differential packer (4) and constant pressure valve (5), and differential packer (4) is between two centralizers (3).
2. horizontal well chemical plugging tubing string according to claim 1; It is characterized in that: level pressure packing group mainly is made up of a constant pressure valve (5), two centralizers (3) and a differential packer (4); Constant pressure valve (5) is connected the bottom of safety joint (6) through chamfering oil pipe (2); Bottom at constant pressure valve (5) connects first centralizer (3) through chamfering oil pipe (2), connects differential packer (4) in the bottom of first centralizer (3), and the bottom of differential packer (4) connects second centralizer (3).
3. horizontal well chemical plugging tubing string according to claim 1; It is characterized in that: level pressure packing group mainly is made up of a constant pressure valve (5), four centralizers (3) and two differential packers (4); First centralizer (3) is connected the bottom of safety joint (6) through chamfering oil pipe (2); First centralizer (3) connects the first differential packer (4); The lower end of the first differential packer (4) connects second centralizer (3), and the lower end of second centralizer (3) connects constant pressure valve (5) through chamfering oil pipe (2), and the lower end of constant pressure valve (5) connects the 3rd centralizer (3) through chamfering oil pipe (2); The lower end of the 3rd centralizer (3) connects the second differential packer (4), and the lower end of the second differential packer (4) connects the 4th centralizer (3).
4. horizontal well chemical plugging tubing string according to claim 1; It is characterized in that: level pressure packing group mainly is made up of a constant pressure valve (5), two centralizers (3) and a differential packer (4); First centralizer (3) is connected the bottom of safety joint (6) through chamfering oil pipe (2); First centralizer (3) connects differential packer (4), and the lower end of differential packer (4) connects second centralizer (3), and the lower end of second centralizer (3) connects constant pressure valve (5) through chamfering oil pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202641505U CN202215191U (en) | 2011-07-25 | 2011-07-25 | Chemical plugging tubular column for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202641505U CN202215191U (en) | 2011-07-25 | 2011-07-25 | Chemical plugging tubular column for horizontal well |
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| CN202215191U true CN202215191U (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202641505U Expired - Lifetime CN202215191U (en) | 2011-07-25 | 2011-07-25 | Chemical plugging tubular column for horizontal well |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120997A (en) * | 2014-07-31 | 2014-10-29 | 中国石油天然气股份有限公司 | Pipe column for horizontal well |
| CN104963662A (en) * | 2015-06-11 | 2015-10-07 | 中国石油天然气股份有限公司 | Self-regulating water pipe column for oil well throttling and regulating method |
| CN106401540A (en) * | 2015-07-21 | 2017-02-15 | 思达斯易能源技术(集团)有限公司 | Segmented oil-stabilizing water-controlling method and device |
| CN106917598A (en) * | 2015-12-25 | 2017-07-04 | 中国石油天然气股份有限公司 | Acid fracturing tubing string and packing method |
| CN111535777A (en) * | 2020-06-16 | 2020-08-14 | 中国石油集团渤海钻探工程有限公司 | Sand-prevention water-control fixed-point squeeze-injection pipe column and application method thereof |
| CN111577196A (en) * | 2020-05-22 | 2020-08-25 | 中国石油天然气股份有限公司 | Water plugging method for high-water-content horizontal well in oil field |
-
2011
- 2011-07-25 CN CN2011202641505U patent/CN202215191U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120997A (en) * | 2014-07-31 | 2014-10-29 | 中国石油天然气股份有限公司 | Pipe column for horizontal well |
| CN104963662A (en) * | 2015-06-11 | 2015-10-07 | 中国石油天然气股份有限公司 | Self-regulating water pipe column for oil well throttling and regulating method |
| CN104963662B (en) * | 2015-06-11 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of oil well throttling self-regulated water control pipe post and regulation and control method |
| CN106401540A (en) * | 2015-07-21 | 2017-02-15 | 思达斯易能源技术(集团)有限公司 | Segmented oil-stabilizing water-controlling method and device |
| CN106917598A (en) * | 2015-12-25 | 2017-07-04 | 中国石油天然气股份有限公司 | Acid fracturing tubing string and packing method |
| CN111577196A (en) * | 2020-05-22 | 2020-08-25 | 中国石油天然气股份有限公司 | Water plugging method for high-water-content horizontal well in oil field |
| CN111535777A (en) * | 2020-06-16 | 2020-08-14 | 中国石油集团渤海钻探工程有限公司 | Sand-prevention water-control fixed-point squeeze-injection pipe column and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |