CN204371133U - Double-pipe steam injection pipe column of horizontal well - Google Patents
Double-pipe steam injection pipe column of horizontal well Download PDFInfo
- Publication number
- CN204371133U CN204371133U CN201420773767.3U CN201420773767U CN204371133U CN 204371133 U CN204371133 U CN 204371133U CN 201420773767 U CN201420773767 U CN 201420773767U CN 204371133 U CN204371133 U CN 204371133U
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- Prior art keywords
- steam injection
- horizontal well
- pipe
- double
- injection string
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 152
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract 2
- 239000010779 crude oil Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- 230000003750 conditioning effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010794 Cyclic Steam Stimulation Methods 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides a double-barrelled steam injection tubular column of horizontal well, it includes: the inner steam injection pipe column extends from a vertical well section of the horizontal well to a horizontal well section of the horizontal well, a first channel is formed inside the inner steam injection pipe column, and a first bell mouth is formed at the toe of the inner steam injection pipe column, which is positioned at the horizontal well; outer steam injection tubular column, it is established including the steam injection tubular column outside, is formed with between outer steam injection tubular column and the interior steam injection tubular column and is annular second passageway, and outer steam injection tubular column extends to the heel department of horizontal well by the vertical well section of horizontal well, and outer steam injection tubular column contains consecutive vacuum insulation pipe, oil pipe and second horn mouth, and vacuum insulation pipe and oil pipe are located vertical well section department, and the second horn mouth is located the heel department of horizontal well. The utility model discloses can effectively improve the horizontal well section and use the degree, improve the yield of viscous crude oil well and the steam utilization ratio in the horizontal well, improve the economic benefits of viscous crude thermal recovery, its simple structure, convenient operation, it is with low costs.
Description
Technical field
The utility model has to be noted about a kind of steam inject tube, especially has about in a kind of thickened oil recovery field, for the double-pipe steam injection pipe column for horizontal well used during horizontal well even steam injection.
Background technology
Horizontal well is after brill that is vertical or that slightly tilt reaches oil reservoir, Vertical Well section and net horizontal section angle are about 90 degree, net horizontal section is approximate parallel with oil reservoir, and this horizontal well can reach rice up to a hundred and even thousands of rice through the length of oil reservoir, and it is conducive to the recovery ratio improving oil well output and reservoir.Wherein, for thick oil horizontal well, exploitation via steam injection is one of main body production practice, at present, along with horizontal wells technology is day by day ripe, utilize horizontal well heat extraction by steam injection to improve production capacity and the recovery ratio of heavy crude well, become a kind of cost-effective means and approach of taping the latent power of viscous crude field.
Existing horizontal well steam injection tubing string is divided into general mode steam injection and non-uniform manner steam injection.General mode steam injection only has a venthole at net horizontal section, because the net horizontal section of horizontal well is long, generally all at about 300m, and net horizontal section also existence sex differernce, so easily cause net horizontal section local to advance by leaps and bounds, employ uneven phenomenon.In addition, for even steam injection technology, such as multiple spot steam injection technology, it is before oil well stream-injection, first the well temperature curve of test oil interval, then according to well temperature distribution situation etc., design multiple oil well stream-injection point, thus the object that realization is evenly employed, but, this even steam injection technology adopts single steam injection string, steam can only be injected into oil reservoir in steam injection string, can not adjust according to the steam injection ratio of the actual conditions at oil reservoir diverse location place to varying level well section in steam injection process, thus the thermal loss injecting steam is added, have impact on steam injection efficiency, seriously reduce the economic benefit of heavy crude heat extraction.
Because above-mentioned prior art Problems existing, the present inventor, in conjunction with the design for many years of relevant manufacture field and use experience, was aided with strong professional knowledge, was optimized design to existing horizontal well steam injection tubing string, a kind of double-pipe steam injection pipe column for horizontal well is provided, overcomes above-mentioned defect.
Utility model content
The purpose of this utility model is to provide a kind of double-pipe steam injection pipe column for horizontal well, its well section development degree of can effectively improving the standard, and improves the steam utilization in the output of heavy crude well and horizontal well, improve the economic benefit of heavy crude heat extraction, its structure is simple, and easy to operate, cost is low.
Above-mentioned purpose of the present utility model and effect can adopt following technical proposal to realize: a kind of double-pipe steam injection pipe column for horizontal well, and it comprises:
Interior steam injection string, it extends to the net horizontal section of described horizontal well by the Vertical Well section of horizontal well, and described interior steam injection string inside forms first passage, and the tiptoe place that described interior steam injection string is being positioned at described horizontal well is provided with the first horn mouth;
Outer steam injection string, it is outside that it is set in described interior steam injection string, ringwise second channel is formed between described outer steam injection string and described interior steam injection string, described outer steam injection string extends to the heel of described horizontal well by the Vertical Well section of described horizontal well, described outer steam injection string comprises the vacuum heat insulation tube, oil pipe and the second horn mouth that are connected successively, described vacuum heat insulation tube and described oil pipe are positioned at described Vertical Well section place, and described second horn mouth is positioned at the heel place of described horizontal well.
In a preferred embodiment, be interconnected by variable buckle between described oil pipe and described vacuum heat insulation tube.
In a preferred embodiment, described interior steam injection string and described outer steam injection string are that concentric is arranged.
In a preferred embodiment, described interior steam injection string is integral joint tubing, and its diameter is 48mm.
In a preferred embodiment, described first bell-mouthed diameter is 48mm.
In a preferred embodiment, the diameter of the vacuum heat insulation tube of described outer steam injection string is 114mm.
In a preferred embodiment, the diameter of the oil pipe of described outer steam injection string is 89mm.
In a preferred embodiment, the second bell-mouthed diameter of described outer steam injection string is 89mm.
Feature and the advantage of a kind of double-pipe steam injection pipe column for horizontal well of the present utility model are: it adopts concentric type double-pipe steam injection pipe column structure, achieve with different passages net horizontal section 2 steam injection respectively, the steam injection amount of different steam injection point is adjusted by the steam injection amount adjusted in different passage, thus can according to oil reservoir actual conditions, realize the dynamic conditioning of in steam injection process, the different steam injection point of net horizontal section being joined to vapour ratio, reach reasonable distributing steam quantitatively, well section of effectively improving the standard development degree, improve the steam utilization in the output of heavy crude well and horizontal well, improve the economic benefit of heavy crude heat extraction, structure is simple, easy to operate, cost is low.
Accompanying drawing explanation
The following drawings is only intended to do the utility model schematically explain and illustrate, and is not used to limit scope of the present utility model.
Fig. 1 is the structural representation of the utility model double-pipe steam injection pipe column for horizontal well;
Drawing reference numeral illustrates:
1 horizontal well, 2 variable buckles, steam injection string in 3,31 first horn mouths, 32 first passages, 4 outer steam injection strings, 41 vacuum heat insulation tubes, 42 oil pipes, 43 second horn mouths, 44 second channels, 5 sleeve pipes, 51 third channels, A heel, B tiptoe.
Detailed description of the invention
In order to have clearer understanding to the technical solution of the utility model, object and effect, existing accompanying drawings detailed description of the invention of the present utility model.
As shown in Figure 1, the utility model provides a kind of double-pipe steam injection pipe column for horizontal well, it comprises: interior steam injection string 3, it extends to the net horizontal section of horizontal well 1 by the Vertical Well section of horizontal well 1, described interior steam injection string 3 inside forms first passage 32, and the tiptoe B place that described interior steam injection string 3 is being positioned at described horizontal well 1 is provided with the first horn mouth 31; Outer steam injection string 4, it is outside that it is set in described interior steam injection string 3, ringwise second channel 44 is formed between described outer steam injection string 4 and described interior steam injection string 3, described outer steam injection string 4 extends to the heel A of horizontal well 1 by the Vertical Well section of horizontal well 1, described outer steam injection string 4 comprises the vacuum heat insulation tube 41, oil pipe 42 and the second horn mouth 43 that are connected successively, described vacuum heat insulation tube 41 and described oil pipe 42 are positioned at described Vertical Well section place, and described second horn mouth 43 is positioned at the heel A place of described horizontal well 1.
Specifically, interior steam injection string 3 is integral joint tubing, and tiptoe B one end that interior steam injection string 3 is being positioned at horizontal well 1 is provided with the first horn mouth 31, and it can increase vapor flow, reduces flow resistance; Outer steam injection string 4 comprises the vacuum heat insulation tube 41, oil pipe 42 and the second horn mouth 43 that connect successively from horizontal well 1 well head to heel A, be interconnected by variable buckle 2 between vacuum heat insulation tube 41 and oil pipe 42, oil pipe 42 connects the second horn mouth 43 away from one end of vacuum heat insulation tube 41, the outlet of the second horn mouth 43 is towards the tiptoe B direction of horizontal well 1, second horn mouth 43 can increase vapor flow, reduce flow resistance, improve steam utilization; And; outer steam injection string 4 is sheathed on the outside of interior steam injection string 3; interior steam injection string 3 is arranged in concentric with outer steam injection string 4, makes outer steam injection string 4 can internally steam injection string 3 protective effect to a certain extent, and the salvaging that can prevent interior steam injection string 3 from causing because coming off is difficult.
This double-pipe steam injection pipe column for horizontal well is arranged in the sleeve pipe 5 of horizontal well 1, is formed with ringwise third channel 51 between sleeve pipe 5 and outer steam injection string 4, and sleeve pipe 5 also can be arranged with interior steam injection string 3 and outer steam injection string 4 concentric; In steam injection process, by carrying out heat insulation to the inner nitrogen injection of third channel 51, the nitrogen injected can enter stratum with steam, and the nitrogen injected can also improve strata pressure, play the row of helping to act on, increase substantially oil well productivity, improve cyclic steam stimulation effect, but also steam injection amount can be reduced, save cost.
Further, horizontal well 1 well head place is provided with Double-pipe gas-injection wellhead assembly, steam is mainly injected the first passage 32 of interior steam injection string 3 and the second channel 44 between outer steam injection string 4 and interior steam injection string 3 by respectively, and this Double-pipe gas-injection wellhead assembly is connected on double-pipe steam injection pipe column for horizontal well of the present utility model by a dual tubing hanger.The mass dryness fraction distributor such as this Double-pipe gas-injection wellhead assembly to be provided with, be used for carrying out dynamic conditioning to the steam injection ratio of double-pipe steam injection pipe column for horizontal well etc. mass dryness fraction distributor, boiler mainly carries the steam of coming to be divided into two strands by it, respectively in the first passage 32 of the interior steam injection string 3 of Injection Level well double-pipe steam injection pipe column and second channel 44 between interior steam injection string 3 and outer steam injection string 4, thus the steam injection amount of first passage 32 and second channel 44 is injected in adjustment, realizes the dynamic conditioning of different steam injection point distribution capacity thus according to the actual conditions of heavy crude well.
In a preferred embodiment, the integral joint tubing of the interior steam injection string 3 of double-pipe steam injection pipe column for horizontal well to be diameter be 48mm, the diameter of the first horn mouth 31 that integral joint tubing one end connects is 48mm; The diameter of the vacuum heat insulation tube 41 of outer steam injection string 4 is 114mm, and be further that the internal diameter of vacuum heat insulation tube 41 is 76mm, the diameter of the oil pipe 42 of outer steam injection string 4 is 89mm, and the diameter of the second horn mouth 43 is 89mm.
The installation of the utility model double-pipe steam injection pipe column for horizontal well is after completing preparation of construction work, first cemented the well by sleeve pipe 5, then in sleeve pipe 5, outer steam injection string 4 is sent into, it is the second horn mouth 43 successively that outer steam injection string enters order for 4 times, oil pipe 42 and vacuum heat insulation tube 41, the degree of depth that outer steam injection string 4 is sent in sleeve pipe 5 is up to the standard well 1 heel A point position, then steam injection string 3 in sending in outside steam injection string 4, it is the first horn mouth 31 successively that interior steam injection string enters order for 3 times, integral joint tubing, the degree of depth that interior steam injection string 3 is sent into is up to the standard well 1 tiptoe B point position.
Double-pipe steam injection pipe column for horizontal well of the present utility model is in steam injection process, two strands of steam are divided into from mass dryness fraction distributors such as boiler steam processes out, one steam injects interior steam injection string 3 by first passage 32, steam injection is carried out to the tiptoe B of horizontal well 1, one steam injects annular region between outer steam injection string 4 and interior steam injection string 3 by second channel 44 in addition, steam injection is carried out to the heel A of horizontal well 1, the steam distribution ratio entering first passage 32 and second channel 44 can adjust according to the well temperature curve of the well section tested in advance, the real time data that also can monitor according to the monitoring equipment of the medium mass dryness fraction distributor of steam injection process and adjusting, simultaneously, by third channel 51 by the annular region between nitrogen sprue bushing 5 and outer steam injection string 4, thus nitrogen injection carries out to whole steam injection process heat insulation, and make nitrogen and steam enter stratum.
Double-pipe steam injection pipe column for horizontal well of the present utility model adopts concentric type double-pipe steam injection pipe column structure, can realize carrying out steam injection with different passages respectively to the heel A of horizontal well 1 and tiptoe B two steam injection points, the mass dryness fraction distributor such as to pass through adjust the steam injection amount in different passage and adjust the steam injection amount of different steam injection point, thus can according to the actual conditions of oil reservoir, realize the dynamic conditioning of in steam injection process, the different steam injection point of net horizontal section being joined to vapour ratio, reach reasonable distributing steam quantitatively, well section of effectively improving the standard development degree, improve the steam utilization in the output of heavy crude well and horizontal well, meanwhile, nitrogen and the steam on stratum are injected in mixing, can improve strata pressure, improve oil well productivity, improve cyclic steam stimulation effect, but also can reduce steam injection amount, save cost, improve the economic benefit of heavy crude heat extraction, and the utility model structure is simple, and easy to operate, cost is low.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from principle of the present utility model and design and amendment, all should belong to protection domain of the present utility model.
Claims (8)
1. a double-pipe steam injection pipe column for horizontal well, is characterized in that, described double-pipe steam injection pipe column for horizontal well comprises:
Interior steam injection string, it extends to the net horizontal section of described horizontal well by the Vertical Well section of horizontal well, and described interior steam injection string inside forms first passage, and the tiptoe place that described interior steam injection string is being positioned at described horizontal well is provided with the first horn mouth;
Outer steam injection string, it is outside that it is set in described interior steam injection string, ringwise second channel is formed between described outer steam injection string and described interior steam injection string, described outer steam injection string extends to the heel of described horizontal well by the Vertical Well section of described horizontal well, described outer steam injection string comprises the vacuum heat insulation tube, oil pipe and the second horn mouth that are connected successively, described vacuum heat insulation tube and described oil pipe are positioned at described Vertical Well section place, and described second horn mouth is positioned at the heel place of described horizontal well.
2. double-pipe steam injection pipe column for horizontal well according to claim 1, is characterized in that, is interconnected between described oil pipe and described vacuum heat insulation tube by variable buckle.
3. double-pipe steam injection pipe column for horizontal well according to claim 1 and 2, is characterized in that, described interior steam injection string and described outer steam injection string are that concentric is arranged.
4. double-pipe steam injection pipe column for horizontal well according to claim 3, is characterized in that, described interior steam injection string is integral joint tubing, and its diameter is 48mm.
5. double-pipe steam injection pipe column for horizontal well according to claim 3, is characterized in that, described first bell-mouthed diameter is 48mm.
6. double-pipe steam injection pipe column for horizontal well according to claim 3, is characterized in that, the diameter of the vacuum heat insulation tube of described outer steam injection string is 114mm.
7. double-pipe steam injection pipe column for horizontal well according to claim 3, is characterized in that, the diameter of the oil pipe of described outer steam injection string is 89mm.
8. double-pipe steam injection pipe column for horizontal well according to claim 3, is characterized in that, the second bell-mouthed diameter of described outer steam injection string is 89mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420773767.3U CN204371133U (en) | 2014-12-10 | 2014-12-10 | Double-pipe steam injection pipe column of horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420773767.3U CN204371133U (en) | 2014-12-10 | 2014-12-10 | Double-pipe steam injection pipe column of horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204371133U true CN204371133U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420773767.3U Expired - Fee Related CN204371133U (en) | 2014-12-10 | 2014-12-10 | Double-pipe steam injection pipe column of horizontal well |
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| Country | Link |
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| CN (1) | CN204371133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514251A (en) * | 2016-06-17 | 2017-12-26 | 中国石油天然气股份有限公司 | SAGD horizontal well concentric pipe steam injection heat transfer method |
-
2014
- 2014-12-10 CN CN201420773767.3U patent/CN204371133U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514251A (en) * | 2016-06-17 | 2017-12-26 | 中国石油天然气股份有限公司 | SAGD horizontal well concentric pipe steam injection heat transfer method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 |
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| CF01 | Termination of patent right due to non-payment of annual fee |