CN202810675U - Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well - Google Patents
Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well Download PDFInfo
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- CN202810675U CN202810675U CN 201220370732 CN201220370732U CN202810675U CN 202810675 U CN202810675 U CN 202810675U CN 201220370732 CN201220370732 CN 201220370732 CN 201220370732 U CN201220370732 U CN 201220370732U CN 202810675 U CN202810675 U CN 202810675U
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Abstract
The utility model discloses a mechanical water plugging string for multiple water outlet points of a perforated casing completion multi-section fractured horizontal well. The mechanical water plugging string comprises a plug, an Y445-type releasing packer and at least three Y441-type packers. The Y441-type packers are arranged between the plug and the Y445-type releasing packer at intervals, a sealed oil layer packing section and a sealed water outlet layer packing section are formed among each two adjacent Y441-type packers and the inner wall of a casing of the horizontal well, a safety joint and a control switch are sequentially serially connected between the two Y441-type packers of each oil layer packing section by oil pipes, a safety switch is serially connected between the two Y441-type packers of each water outlet layer packing section by oil pipes, and the oil layer packing sections and the water outlet layer packing sections are serially connected with one another by oil pipes. The multiple Y441-type packers and the control switches are combined in a multi-stage manner, so that the multiple water outlet points or an optional water outlet point of the multi-section fractured horizontal well can be effectively plugged, effective production of a main oil layer section is realized, and effects of controlling water and enhancing production of oil are achieved.
Description
Technical field
The utility model relates to the water plugging string in a kind of oil extraction in oil field technical field, relates in particular to the mechanical water plugging pipe string of a kind of cased hole completion multistage pressure break horizontal well multiple spot water outlet.
Background technology
In field of petroleum exploitation, because horizontal well self well track, flooding pattern is complicated and changeable, and each oil reservoir lithology, physical property are different with properties of fluid in bearing stratum, easily cause the water outlet of horizontal well multiple spot after the horizontal well operation, affect the horizontal well development effect.In order to bring into play better horizontal well development potential, oil worker both domestic and external has carried out the water-plugging technology research of horizontal well; At present both at home and abroad for the outlook for mechanical water plugging technology comparative maturity of orientation, but that is that all right is ripe for horizontal well multiple spot water exit interval water pack off technique.Therefore, for effectively controlling the water outlet of horizontal well multiple spot water exit interval, reach the effect of water-control oil-increasing, having become needs in the industry an important technology difficult problem solving.
As Chinese utility model patent " fishable and drillable water plugging of horizontal well process pipe string " (notification number: CN201269077), Chinese invention patent application " a kind of annular chemical packer material for water plugging of horizontal well " (publication number: CN101899291A) and Chinese utility model patent " 51/2 " well-case perforating completion horizontal well machinery layering look for the water blockoff combined string " (notification number: CN201321833) just put down in writing relevant technical scheme.Wherein, " fishable and drillable water plugging of horizontal well process pipe string " can only realize the two-stage sealing, namely can only be applied to the shutoff of single-point water outlet, can't realize the shutoff of multiple spot water outlet; " a kind of annular chemical packer material for water plugging of horizontal well " is applied to the sieve tube completion horizontal well; The water blockoff combined string is looked in the layering of " 51/2 " well-case perforating completion horizontal well machinery " for looking for stifled integrated one-trip string; be that water plugging string is connected with flow string; tubing string occurs to wriggle and easily causes packer to lose efficacy in the manufacturing process; the water blockoff period of validity is short; adopt simultaneously votage control switch; easy build-up of pressure is obscured when suppressing, and easily causes water blockoff to lose efficacy.
For this reason, effectively shutoff of machinery for the water outlet of horizontal well multiple spot or arbitrfary point water outlet, realize that control increases oil, the purpose of the well development effect of improving the standard the utility model proposes mechanical water plugging pipe string and the shutoff method of the water outlet of a kind of cased hole completion multistage pressure break horizontal well multiple spot.
The utility model content
The purpose of this utility model provides a kind ofly can carry out effective machine plugging to the water outlet of horizontal well multiple spot or arbitrfary point water outlet, realizes water-control oil-increasing, the mechanical water plugging pipe string of the cased hole completion multistage pressure break horizontal well multiple spot water outlet of the well development effect of improving the standard.
For achieving the above object, the utility model proposes the mechanical water plugging pipe string of a kind of cased hole completion multistage pressure break horizontal well multiple spot water outlet, described mechanical water plugging pipe string comprises: plug and Y445 type back-off packer are arranged at respectively end and the front end of mechanical water plugging pipe string; At least three Y441 type packers, be arranged at intervals between described plug and the described Y445 type back-off packer, and between the inwall of adjacent in twos Y441 type packer and horizontal well casing pipe, form at least one oil reservoir packing section and at least one water-yielding stratum packing section of sealing; Between two Y441 type packers of each described oil reservoir packing section, be serially connected with successively safety joint and gauge tap by oil pipe, be connected to safety joint by oil pipe string between two Y441 type packers of each described water-yielding stratum packing section, described oil reservoir packing section is connected in series by oil pipe with described water-yielding stratum packing section.
The mechanical water plugging pipe string of aforesaid cased hole completion multistage pressure break horizontal well multiple spot water outlet, wherein, described gauge tap is ball-and-seat or sliding sleeve switch or time switch.
The mechanical water plugging pipe string of aforesaid cased hole completion multistage pressure break horizontal well multiple spot water outlet, wherein, described mechanical water plugging pipe string is arranged at the horizontal segment of horizontal well, and described mechanical water plugging pipe string is separated with vertical section the flow string that is arranged at horizontal well.
The mechanical water plugging pipe string of aforesaid cased hole completion multistage pressure break horizontal well multiple spot water outlet wherein, is provided with safety joint between the Y441 type packer that described Y445 type back-off packer is adjacent.
Compared with prior art, the utlity model has following characteristics and advantage:
1, the utility model is divided into a plurality of packings zone by a plurality of Y441 type packers with the down-hole casing space, formation is corresponding to the oil reservoir packing section of oil layer section with corresponding to the water-yielding stratum packing section of water exit interval, water-yielding stratum packing section is used for the Plugging Water Zones section, oil reservoir packing section is used for the oil-separating layer section, utilize the oil pipe of gauge tap control oil reservoir packing section and being communicated with or sealing of oil layer section, realize the effectively shutoff of machinery of multistage pressure break horizontal well multiple spot water outlet or arbitrfary point water outlet, reach effective production of major oil reservoir section, reach the effect of water-control oil-increasing.
2, the utility model adopts Y445 type back-off packer that mechanical water plugging pipe string is given up in net horizontal section, mechanical water plugging pipe string is separated with vertical section the flow string that is arranged at horizontal well, effectively avoid effectively having improved the period of validity of water pack off because the flow string wriggling causes the phenomenon of net horizontal section water plugging string seal failure.
Description of drawings
Accompanying drawing described here only is used for task of explanation, and is not intended to limit by any way the utility model scope of disclosure.In addition, the shape of each parts among the figure and proportional sizes etc. only are schematically, be used for helping understanding of the present utility model, and be not shape and the proportional sizes that specifically limits each parts of the utility model.Those skilled in the art can select various possible shapes and proportional sizes to implement the utility model under instruction of the present utility model as the case may be.
Fig. 1 is the structural representation of embodiment of the mechanical water plugging pipe string of the utility model cased hole completion multistage pressure break horizontal well multiple spot water outlet:
Fig. 2 is the structural representation of another embodiment of the mechanical water plugging pipe string of the utility model cased hole completion multistage pressure break horizontal well multiple spot water outlet.
Description of reference numerals:
The 1-oil pipe; 2-Y445 type back-off packer; 3-Y441 type packer; The 4-safety joint; The 5-gauge tap; The 6-plug; 7-oil reservoir packing section; 8-water-yielding stratum packing section; The 9-oil layer section; The 10-water exit interval; The 11-flow string; The 12-sleeve pipe.21,22,23,24,25-specking.
The specific embodiment
With the description of the utility model specific embodiment, can more be well understood to details of the present utility model by reference to the accompanying drawings.But the specific embodiment of the present utility model described here only is used for explaining the purpose of this utility model, is to restriction of the present utility model and can not be understood as by any way.Under instruction of the present utility model, the technician can conceive based on arbitrarily possible distortion of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
Please refer to Fig. 1, be the structural representation of the embodiment of the mechanical water plugging pipe string of the utility model cased hole completion multistage pressure break horizontal well multiple spot water outlet.As shown in Figure 1, the mechanical water plugging pipe string of the cased hole completion multistage pressure break horizontal well multiple spot water outlet that the utility model proposes, comprise oil pipe 1, Y445 type back-off packer 2, Y441 type packer 3, safety joint 4, gauge tap 5 and plug 6, wherein, plug 6 is arranged at the end one end of well head (namely away from) of whole endowel, and Y445 type back-off packer 2 is arranged at the front end one end of well head (namely near) of whole endowel; Between plug 6 and described Y445 type back-off packer 2, be provided with at intervals a plurality of Y441 type packers, in the present embodiment, be provided with four Y441 type packers, can certainly three, five, six or more Y441 type packer be set according to the operating mode needs, the utility model is not restricted the quantity of Y441 type packer.Between the inwall of adjacent in twos Y441 type packer and horizontal well casing pipe, form the oil reservoir packing section 7 of at least one sealing and the water-yielding stratum packing section 8 of at least one sealing, the position of oil reservoir packing section 7 is corresponding to oil layer section 9, be used for oil-separating layer section 9, in order to produce; Water-yielding stratum packing section 8 is used for Plugging Water Zones section 10, with the shutoff water outlet corresponding to water exit interval 10.Certainly, oil reservoir packing section 7 and water-yielding stratum packing section 8 also can arrange a plurality of according to actual needs, to satisfy water blockoff and the production requirement of the water outlet of cased hole completion multistage pressure break horizontal well multiple spot.Between two Y441 type packers 3 of each oil reservoir packing section 7, be serially connected with successively safety joint 4 and gauge tap 5 by oil pipe 1, gauge tap 5 enters to the oil pipe 1 of tubing string for the crude oil of control oil layer section output, with by oil pipe 1 with Crude Oil Transportation to upper horizontal well, pumped to aboveground by flow string and oil well pump again, realize the production of oil layer section.Between two Y441 type packers 3 of each water-yielding stratum packing section 8, be serially connected with safety joint 4 by oil pipe 1, oil reservoir packing section 7 and water-yielding stratum packing section 8 are serially connected successively by oil pipe 1, and each oil pipe 1 is communicated with the supervisor who forms whole mechanical water plugging pipe string successively.Certainly, also can consist of water-yielding stratum packing section 8 between the Y441 type packer 3 that Y445 type back-off packer 2 is adjacent, be connected with safety joint 4 in this water-yielding stratum packing section 8.The utility model is divided into a plurality of airtight packings zone by a plurality of Y441 type packers 3 with the down-hole casing space, corresponding to different oil layer section 9 and a plurality of water exit interval 10, utilize the oil pipe of gauge tap 5 control oil reservoir packing sections and being communicated with or sealing of oil layer section 9, realize the effectively shutoff of machinery of multistage pressure break horizontal well multiple spot water outlet or arbitrfary point water outlet, reach effective production of major oil reservoir section, reach the effect of water-control oil-increasing.
Further, the utility model adopts Y445 type back-off packer 2 that mechanical water plugging pipe string is given up in net horizontal section, mechanical water plugging pipe string is separated with vertical section the flow string 11 that is arranged at horizontal well, effectively avoid effectively having improved the period of validity of water pack off because flow string 11 wrigglings cause the phenomenon of net horizontal section water plugging string seal failure.
Further, gauge tap 5 is ball-and-seat or sliding sleeve switch or time switch.Can adopt respectively above-mentioned all kinds of gauge tap for a plurality of oil reservoir packing sections 7.
The mechanical water plugging pipe string of cased hole completion multistage pressure break horizontal well multiple spot of the present utility model water outlet has been realized the effectively shutoff of machinery of the water outlet of horizontal well multiple spot or arbitrfary point water outlet, reaches water-control oil-increasing, has improved horizontal well ultimate recovery and development effectiveness.
Adopt the shutoff method of the mechanical water plugging pipe string of the utility model cased hole completion multistage pressure break horizontal well multiple spot water outlet may further comprise the steps:
With mechanical water plugging pipe string down to the horizontal well desired location;
Suppress and set Y441 type packer 3, Y445 type back-off packer 2, so that at least one oil reservoir packing section 7 and at least one water-yielding stratum packing section 8 of sleeve pipe 12 interior formation sealings;
Because corresponding water exit interval 10 does not arrange gauge tap 5, and by 8 shutoff of water-yielding stratum packing section, oil layer section 9 makes oil pipe 1 inside be communicated with oil layer section 9 by gauge tap 5, realizes water-control oil-increasing, reaches the purpose of the well development effect of improving the standard.
Further, if gauge tap 5 adopts ball-and-seat, suppress set Y441 type packer 3, Y445 type back-off packer 2 after, continue to suppress Y445 type back-off packer 2, so that ball-and-seat is opened automatically in process of production, realize the production of oil layer section under oil layer section 9 and oil pipe 1 interior differential pressure action.The structure of ball-and-seat and operating principle are prior art, are not described in detail at this.
Further, if gauge tap 5 adopts sliding sleeve switch, suppress set Y441 type packer 3, Y445 type back-off packer 2 after, continue to suppress Y445 type back-off packer 2, then one by one to the oil pipe 1 interior input spheroid corresponding with sliding sleeve switch (can throw in by sphere diameter order from small to large), open one by one the sliding sleeve switch of oil layer section 9, realize the production of oil layer section.The structure of sliding sleeve switch and operating principle are prior art, are not described in detail at this.
Further, if gauge tap 5 adopts time switches, with mechanical water plugging pipe string before the desired location, set first the acquisition time that opens or closes of time switch on ground; Suppressing when setting Y441 type packer 3, Y445 type back-off packer 2, time switch is closed condition; Suppress set Y441 type packer 3, Y445 type back-off packer 2 and finish after, time switch is converted to open mode, is communicated with the oil pipe of oil layer section 9 and oil reservoir packing section 7, realizes the production of oil layer section.The structure of time switch and operating principle are prior art, are not described in detail at this.
As shown in Figure 1, the concrete structure of the embodiment of the mechanical water plugging pipe string of the utility model cased hole completion multistage pressure break horizontal well multiple spot water outlet is: First blowout point 21, specking 23,25 3 water outlets of specking, water plugging string is connected the lower end of Y441 type packer 3 by oil pipe 1 by the upper end of plug 6, the upper end of Y441 type packer 3 connects the lower end of safety joint 4 by oil pipe 1, the upper end of safety joint 4 connects the lower end of gauge tap 5 by oil pipe 1, the upper end of gauge tap 5 connects the lower end of Y441 type packer 3 by oil pipe 1, the upper end of Y441 type packer 3 connects the lower end of safety joint 4 by oil pipe 1, the upper end of safety joint 4 connects the lower end of Y441 type packer 3 by oil pipe 1, the upper end of Y441 type packer 3 connects the lower end of safety joint 4 by oil pipe 1, the upper end of safety joint 4 connects the lower end of gauge tap 5 by oil pipe 1, the upper end of gauge tap 5 connects the lower end of Y441 type packer 3 by oil pipe 1, the upper end of Y441 type packer 3 is by the lower end of oil pipe 1 connection safety joint 4, and the upper end of safety joint 4 connects the lower end of Y445 type back-off packer 2 by oil pipe 1.
As shown in Figure 2, be the structural representation of another embodiment of the mechanical water plugging pipe string of the utility model cased hole completion multistage pressure break horizontal well multiple spot water outlet.Its concrete structure is: second mouthful of blowout point 22,24 two water outlets of specking, water plugging string is connected the lower end of gauge tap 5 by oil pipe 1 by the upper end of plug 6, the upper end of gauge tap 5 connects the lower end of Y441 type packer 3 by oil pipe 1, the upper end of Y441 type packer 3 connects the lower end of safety joint 4 by oil pipe 1, the upper end of safety joint 4 connects the lower end of Y441 type packer 3 by oil pipe 1, the upper end of Y441 type packer 3 connects the lower end of safety joint 4 by oil pipe 1, the upper end of safety joint 4 connects the lower end of gauge tap 5 by oil pipe 1, the upper end of gauge tap 5 connects the lower end of Y441 type packer 3 by oil pipe 1, the upper end of Y441 type packer 3 is by the lower end of oil pipe 1 connection safety joint 4, and the upper end of safety joint 4 connects the lower end of Y445 type back-off packer 2 by oil pipe 1.
Concrete shutoff method: describe as an example of ball-and-seat example.
As shown in Figure 1, First blowout point 21, specking 23,25 3 water outlets of specking: at first by design scheme the water plugging string kit is connected, then behind the precalculated position, with cement high pressure car suppress in from oil pipe to tubing string set Y441 type packer 3, Y445 type back-off packer 2 after, continue to suppress the Y445 type back-off packer 2 of giving up; Then descend flow string 11 to produce, water exit interval is by the shutoff of Y441 type packer sealing, and the ball-and-seat of oil layer section is opened under the pressure reduction in oil reservoir and oil pipe, realizes the production of oil-producing interval, reaches the purpose of water-control oil-increasing.
As shown in Figure 2, second mouthful of blowout point 22,24 two water outlets of specking at first connect the water plugging string kit by design scheme, then behind the precalculated position, with cement high pressure car suppress in from oil pipe to tubing string set Y441 type packer 3, Y445 type back-off packer 2 after, continue to suppress the Y445 type back-off packer 2 of giving up; Then descend flow string 11 to produce, water exit interval is by Y441 type packer 3 sealing blockings, and the ball-and-seat of oil layer section is opened under the pressure reduction in oil reservoir and oil pipe, realizes the production of oil-producing interval, reaches the purpose of water-control oil-increasing.
Detailed explanation for the respective embodiments described above, its purpose only is the utility model is made an explanation, so that can understand better the utility model, but, it is to restriction of the present utility model that these descriptions can not be construed to any reason, particularly, each feature of describing in different embodiments is mutual any combination also, thereby form other embodiments, except clear and definite opposite description is arranged, these features should be understood to can be applied in any one embodiment, and also not only are confined to described embodiment.
Claims (4)
1. the mechanical water plugging pipe string of cased hole completion multistage pressure break horizontal well multiple spot water outlet is characterized in that described mechanical water plugging pipe string comprises:
Plug and Y445 type back-off packer are arranged at respectively end and the front end of mechanical water plugging pipe string;
At least three Y441 type packers, be arranged at intervals between described plug and the described Y445 type back-off packer, and between the inwall of adjacent in twos Y441 type packer and horizontal well casing pipe, form at least one oil reservoir packing section and at least one water-yielding stratum packing section of sealing;
Between two Y441 type packers of each described oil reservoir packing section, be serially connected with successively safety joint and gauge tap by oil pipe, be connected to safety joint by oil pipe string between two Y441 type packers of each described water-yielding stratum packing section, described oil reservoir packing section is connected in series by oil pipe with described water-yielding stratum packing section.
2. the mechanical water plugging pipe string of cased hole completion multistage pressure break horizontal well multiple spot as claimed in claim 1 water outlet is characterized in that described gauge tap is ball-and-seat or sliding sleeve switch or time switch.
3. the mechanical water plugging pipe string of cased hole completion multistage pressure break horizontal well multiple spot as claimed in claim 1 water outlet, it is characterized in that, described mechanical water plugging pipe string is arranged at the horizontal segment of horizontal well, and described mechanical water plugging pipe string is separated with vertical section the flow string that is arranged at horizontal well.
4. the mechanical water plugging pipe string of cased hole completion multistage pressure break horizontal well multiple spot as claimed in claim 1 water outlet is characterized in that, is provided with safety joint between the Y441 type packer that described Y445 type back-off packer is adjacent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220370732 CN202810675U (en) | 2012-07-27 | 2012-07-27 | Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220370732 CN202810675U (en) | 2012-07-27 | 2012-07-27 | Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well |
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| CN202810675U true CN202810675U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220370732 Expired - Fee Related CN202810675U (en) | 2012-07-27 | 2012-07-27 | Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808584A (en) * | 2012-07-27 | 2012-12-05 | 中国石油天然气股份有限公司 | Mechanical water plugging pipe column for multi-point discharge of cased hole completion multi-section fractured horizontal well and method |
| CN104481470A (en) * | 2014-12-25 | 2015-04-01 | 中国石油天然气股份有限公司 | Self-adaptive water control string for oil wells and self-adaptive water control method for oil wells |
| CN106089158A (en) * | 2016-08-29 | 2016-11-09 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of horizontal well is every adopting tubing string and every mining method |
| CN112031730A (en) * | 2020-09-15 | 2020-12-04 | 中国石油天然气股份有限公司 | Mechanical horizontal well inter-fracture alternate injection-production oil extraction process |
-
2012
- 2012-07-27 CN CN 201220370732 patent/CN202810675U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808584A (en) * | 2012-07-27 | 2012-12-05 | 中国石油天然气股份有限公司 | Mechanical water plugging pipe column for multi-point discharge of cased hole completion multi-section fractured horizontal well and method |
| CN102808584B (en) * | 2012-07-27 | 2015-05-06 | 中国石油天然气股份有限公司 | Mechanical water plugging pipe column for multi-point discharge of cased hole completion multi-section fractured horizontal well and method |
| CN104481470A (en) * | 2014-12-25 | 2015-04-01 | 中国石油天然气股份有限公司 | Self-adaptive water control string for oil wells and self-adaptive water control method for oil wells |
| CN104481470B (en) * | 2014-12-25 | 2017-08-04 | 中国石油天然气股份有限公司 | A kind of self-adaptive controlled water pipe post of oil well and method |
| CN106089158A (en) * | 2016-08-29 | 2016-11-09 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of horizontal well is every adopting tubing string and every mining method |
| CN106089158B (en) * | 2016-08-29 | 2018-05-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of horizontal well is every adopting tubing string and every mining method |
| CN112031730A (en) * | 2020-09-15 | 2020-12-04 | 中国石油天然气股份有限公司 | Mechanical horizontal well inter-fracture alternate injection-production oil extraction process |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20210727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |