CN104295279B - SAGD (steam assisted gravity drainage) steam injection system - Google Patents
SAGD (steam assisted gravity drainage) steam injection system Download PDFInfo
- Publication number
- CN104295279B CN104295279B CN201410569426.9A CN201410569426A CN104295279B CN 104295279 B CN104295279 B CN 104295279B CN 201410569426 A CN201410569426 A CN 201410569426A CN 104295279 B CN104295279 B CN 104295279B
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- China
- Prior art keywords
- steam
- steam injection
- sagd
- distributor
- trap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 96
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003129 oil well Substances 0.000 claims abstract description 18
- 229920006395 saturated elastomer Polymers 0.000 abstract description 5
- 108010063955 thrombin receptor peptide (42-47) Proteins 0.000 description 12
- 238000009826 distribution Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010730 cutting oil Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2406—Steam assisted gravity drainage [SAGD]
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses an SAGD (steam assisted gravity drainage) steam injection system comprising a steam injection station provided with an inlet and an outlet and at least one steam distributor. The steam injection station comprises at least one boiler. Any steam distributor is communicated with the outlet of the steam injection station. Each steam distributor is provided with a plurality of steam injection lines. The SAGD steam injection system further comprises a plurality of steam trap valves close to a wellhead. The steam trap valves are in one-to-one corresponding communication with the steam injection lines. Each steam trap valve is provided with a drain outlet and a steam outlet; the drain outlet of every steam trap valve is communicated with the inlet of the steam injection station; the steam outlet of every steam trap valve is communicated with an oil well. The SAGD steam injection system with the structure has the advantages that dryness of high temperature steam entering the oil well can be increased, separated saturated water can be reused, and heat of the saturated water is reused.
Description
Technical field
The invention belongs to a kind of field of petroleum exploitation, particularly to a kind of sagd steam injection system.
Background technology
Sagd (full name steam assisted gravity drainage, also known as SAGD) passes through will
A bite straight well above the horizontal production well positioned at oil reservoir near-bottom for the high-temperature steam or a bite horizontal well injection oil reservoir so that
The heated crude oil and steam condensate horizontal well output from oil reservoir bottom.
During production and dispensing, the high-temperature steam that sagd produces also can carry saturation water.But the steaming of sagd injection
Vapour should reduce its saturated water content as far as possible, that is, improve steam quality.Because saturation water can move downward under gravity into
Enter in well, then be lifted to ground.In this process, can there is the temperature difference and produce heat waste in saturation water and surrounding rock between
Lose, be lowered into the vapor (steam) temperature in oil well, also reduce the utilization rate of high-temperature steam.In order to lift water in addition it is also necessary to consumption volume
Outer electric energy.Crude oil after simultaneously producing is also required to be separated with water.
In order to solve this technical problem, in prior art using steam-water separator with etc. mass dryness fraction distribution can realize produce
Go out 95% mass dryness fraction steam, but in view of steam pipeline net along journey heat loss and subterranean well bore heat loss, saturated water content is still
So larger, shaft bottom residue mass dryness fraction is typically only 60%-70%, and steam utilization is relatively low.
Content of the invention
In order to overcome the drawbacks described above of prior art, the technical problem to be solved there is provided a kind of sagd note
Vapour system, it can economize on resources and can improve steam quality.
The concrete technical scheme of the present invention is:
A kind of sagd steam injection system, it includes steam injection station, the steam distributor of at least one with entrance and exit, institute
State steam injection station and include at least one boiler, any one described steam distributor is connected with the outlet of described steam injection station, each steaming
Vapour distributor there are multiple steam injection pipelines it is characterised in that: described sagd steam injection system also includes being disposed proximate at well head
Multiple Automatic steam trap Traps, described Automatic steam trap Trap is corresponded with described steam injection pipeline phase and connects, and each Automatic steam trap Trap has
Drain outlet and steam (vapor) outlet, the drain outlet of each Automatic steam trap Trap is connected with the entrance of described steam injection station, each steaming
The steam (vapor) outlet of vapour drain valve is used for being connected with oil well.
Preferably, it is additionally provided with steam-water separator between described boiler and described steam distributor.
Preferably, described steam injection station includes multiple boilers, each boiler is provided with and its one-to-one steam-water separation
Device.
Preferably, described steam distributor be multiple, described sagd steam injection system also include for by described steam injection station with
The steam injecting pipe that described steam distributor is connected, steam injection main line that described steam injecting pipe includes being connected with described steam injection station,
And for multiple steam injection branch lines that described steam injection main line is connected with described steam distributor, described steam injection branch line with described
Steam distributor phase corresponds.
Preferably, described Automatic steam trap Trap is float ball type steam drain valve.
Preferably, described Automatic steam trap Trap includes housing, the chamber in described housing, and described housing is arranged
State the access road that chamber is connected, described access road is connected with described steam distributor, described steam (vapor) outlet and institute
State drain outlet on described chamber, within the chamber is provided with ball float, ball float realizes opening of described drain outlet in heave
Close.
Preferably, described sagd steam injection system also includes the dryness detecting instrument being arranged in oil well, described steam distributor
According to described dryness detecting instrument, the flow in steam injection pipeline is controlled.
Preferably, described steam distributor is steam dispensers of equal dryness.
Preferably, the entrance of described steam injection station is additionally provided with feed source.
The present invention adopts above structure, can improve the mass dryness fraction of the high-temperature steam entering oil well additionally it is possible to will isolate
Saturation water repetitive cycling utilizes, and the heat of this saturation water is utilized again.
Brief description
Accompanying drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention by any way
Enclose.In addition, the shape of each part of in figure and proportional sizes etc. are only schematically, it is used to help the understanding of the present invention, and
It is not shape and the proportional sizes specifically limiting each part of the present invention.Those skilled in the art under the teachings of the present invention, can
To select various possible shapes and proportional sizes to implement the present invention as the case may be.
Fig. 1 shows the structural representation of the sagd steam injection system in the present invention.
Fig. 2 shows the structural representation of float ball type steam drain valve in the present invention.
The reference of the figures above: 1, steam injection station；11st, entrance；12nd, export；2nd, boiler；3rd, steam-water separator；41st, note
Vapour main line；42nd, steam injection branch line；5th, steam distributor；51st, steam injection pipeline；6th, Automatic steam trap Trap；61st, housing；62nd, chamber；63、
Access road；64th, drain outlet；65th, steam (vapor) outlet；66th, drainage channel；67th, ball float；7th, oil well；8th, backwater channel；9th, intake
Source.
Specific embodiment
In conjunction with the description of accompanying drawing and the specific embodiment of the invention, can clearly understand the details of the present invention.But
It is, the specific embodiment of invention described herein to be only used for explaining the purpose of the present invention, and can not understand by any way
One-tenth is limitation of the present invention.Under the teachings of the present invention, technical staff is contemplated that the arbitrarily possible change based on the present invention
Shape, these are regarded as belonging to the scope of the present invention.
With reference to shown in Fig. 1, the invention discloses a kind of sagd steam injection system, it includes the note with entrance 11 and outlet 12
Vapour station 1, the steam distributor 5 of at least one, described steam injection station 1 includes at least one boiler 2, any one described steam distributor
5 are connected with the outlet 12 of described steam injection station 1, and each steam distributor 5 has multiple steam injection pipelines 51, described sagd steam injection system
System also includes being disposed proximate to the Automatic steam trap Trap 6 at well head, each Automatic steam trap Trap 6 and described steam injection pipeline 51 phase one a pair
Should connect, each Automatic steam trap Trap 6 has drain outlet 64 and steam (vapor) outlet 65, the drain outlet of each Automatic steam trap Trap 6
64 are connected with the entrance 11 of described steam injection station 1, and the steam (vapor) outlet 65 of each Automatic steam trap Trap 6 is used for being connected with oil well 7.
Specifically, steam injection station 1 can include one or more boilers 2, and each boiler 2 can be to entering from steam injection station 1
The water of mouth 11 input are heated, and high-temperature steam is outwards exported from the outlet 12 of steam injection station 1.Each boiler 2 acceptable one
One corresponding be provided with steam-water separator 3, the high-temperature steam that steam-water separator 3 produces to boiler 2 carries out steam-water separation, to improve height
The mass dryness fraction of warm steam.
Steam injection station 1 is connected with steam distributor 5, and the high-temperature steam producing in steam injection station 1 is delivered to steam distribution
In device 5.Steam distributor 5 can be multiple, and any one steam distributor 5 can convey to the oil well 7 being adjacent, with
Reduce the fed distance of steam.In one preferred embodiment, when steam distributor 5 is multiple, described sagd steam injection
System also includes the steam injecting pipe for steam injection station 1 is connected with described steam distributor 5, and described steam injecting pipe includes and institute
State steam injection main line 41 that steam injection station 1 is connected and for described steam injection main line 41 is connected with described steam distributor 5
Multiple steam injection branch lines 42, described steam injection branch line 42 is mutually corresponded with described steam distributor 5.Steam injection main line 41 is by steam injection station 1
Outlet 12 output high-temperature steam carry out overall conveying, each steam injection branch line 42 is all connected with steam injection main line 41, and will note
High-temperature steam in vapour main line 41 is allocated to each steam distributor 5.
Steam distributor 5 has multiple steam injection pipelines 51.Steam distributor 5 is used for carrying out point the high-temperature steam receiving
Join, and the high-temperature steam being assigned is conveyed to oil well 7 from steam injection pipeline 51.Steam distributor 5 can be according to each oil well 7
Actual demand and be arranged on the dryness detecting instrument (not shown) of oil well 7 flow to the high-temperature steam in gas injection pipeline
It is adjusted.In one preferred embodiment, steam distributor 5 can also be steam dispensers of equal dryness.Steam etc. mass dryness fraction
The steam receiving can be derived by vapour distribution with identical mass dryness fraction.
Automatic steam trap Trap 6 is disposed proximate at the well head of oil well 7.Automatic steam trap Trap 6 is mutually corresponded with steam injection pipeline 51
Connection.Saturation water in high-temperature steam can be discharged by Automatic steam trap Trap 6 from drain outlet 64, and saturation water is led to by backwater
Road 8 is from entrance 11 row of steam injection station 1 to steam injection station 1.Automatic steam trap Trap 6 can be by dry saturated steam from steam (vapor) outlet 65 to oil well 7 row
Go out.
Sagd steam injection system in the present invention, steam injection station 1 produces 75% mass dryness fraction steam, and steam-water separator 3 receives 75%
Mass dryness fraction can be improved to more than 95% after mass dryness fraction steam.95% mass dryness fraction steam enters from steam injection main line 41 and steam injection branch line 42 and steams
Vapour distributor 5.Steam distributor 5 is according to the actual requirements and dryness detecting instrument adjusts and goes to the steam flow cutting oil well 7.Due to
There is heat loss, essentially 100m line loss 0.5-1% mass dryness fraction in steam injecting pipe, test through heat loss, well in actual production
At mouthful, mass dryness fraction is essentially 68-75%.The Automatic steam trap Trap 6 being located adjacent to position at well head can will enter the steam of oil well 7
Mass dryness fraction improves again to more than 90%.The saturation water isolated collects the entrance that steam injection station 1 is transported in recovery, full by isolate
And water circulation use.The saturation water isolated is blended with feed source 9 and enters boiler 2.General, the temperature of saturation water is higher than water inlet
The temperature in source 9, therefore saturation water can play the effect to feed source 9 preheating, to play the purpose saving fuel.
In the present embodiment, Automatic steam trap Trap 6 can be float ball type steam drain valve.Shown in reference Fig. 2, float ball type steam
Drain valve can include housing 61, the chamber 62 in housing 61.The entrance that chamber 62 is connected is provided with housing 61 lead to
Road 63, access road 63 is connected with steam distributor 5.The top of chamber 62 is provided with the steam for being connected with oil well 7
Outlet 65.The bottom of chamber 62 is provided with drainage channel 66, is provided with ball float 67 in chamber 62.With the fluctuating of ball float 67, draining is led to
Road 66 opens or closes.
Certain, Automatic steam trap Trap 6 in the present invention can also be using having drain outlet 64 and steam (vapor) outlet 65 should
Other Automatic steam trap Traps of structure.
Each embodiment in this specification is all described by the way of going forward one by one, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar partly mutually referring to.
Above-described embodiment only technology design to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implements according to this, can not be limited the scope of the invention with this.All according to the present invention
Equivalence changes or modification that Spirit Essence is made, all should be included within the scope of the present invention.
Claims (9)
1. a kind of sagd steam injection system, it includes steam injection station, the steam distributor of at least one with entrance and exit, described
Steam injection station includes at least one boiler, and any one described steam distributor is connected with the outlet of described steam injection station, each steam
Distributor there are multiple steam injection pipelines it is characterised in that: described sagd steam injection system also includes being disposed proximate to many at well head
Individual Automatic steam trap Trap, described Automatic steam trap Trap is corresponded with described steam injection pipeline phase and connects, and each Automatic steam trap Trap has row
Water out and steam (vapor) outlet, the drain outlet of each Automatic steam trap Trap is connected with the entrance of described steam injection station, each steam
The steam (vapor) outlet of drain valve is used for being connected with oil well.
2. sagd steam injection system according to claim 1 it is characterised in that: between described boiler and described steam distributor
It is additionally provided with steam-water separator.
3. sagd steam injection system according to claim 2 it is characterised in that: described steam injection station includes multiple boilers, each
It is provided with boiler and its one-to-one steam-water separator.
4. sagd steam injection system according to claim 1 it is characterised in that: described steam distributor be multiple, described
Sagd steam injection system also includes the steam injecting pipe for described steam injection station is connected, described steam injection pipe with described steam distributor
Road includes the steam injection main line being connected with described steam injection station and for described steam injection main line is connected with described steam distributor
Logical multiple steam injection branch lines, described steam injection branch line is corresponded with described steam distributor phase.
5. sagd steam injection system according to claim 1 it is characterised in that: described Automatic steam trap Trap for float ball type steam dredge
Water valve.
6. sagd steam injection system according to claim 5 it is characterised in that: described Automatic steam trap Trap include housing, located at
Chamber in described housing, described housing is provided with the access road being connected with described chamber, described access road and institute
State steam distributor to be connected, on described chamber, within the chamber is provided with ball float for described steam (vapor) outlet and described drain outlet,
Described ball float realizes the opening and closing of described drain outlet in heave.
7. sagd steam injection system according to claim 1 it is characterised in that: described sagd steam injection system also includes being arranged on
Dryness detecting instrument in oil well, described steam distributor is controlled to the flow in steam injection pipeline according to described dryness detecting instrument
System.
8. sagd steam injection system according to claim 1 it is characterised in that: described steam distributor be etc. mass dryness fraction steam divide
Orchestration.
9. sagd steam injection system according to claim 1 it is characterised in that: the entrance of described steam injection station is additionally provided with into water
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569426.9A CN104295279B (en) | 2014-10-22 | 2014-10-22 | SAGD (steam assisted gravity drainage) steam injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569426.9A CN104295279B (en) | 2014-10-22 | 2014-10-22 | SAGD (steam assisted gravity drainage) steam injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104295279A CN104295279A (en) | 2015-01-21 |
| CN104295279B true CN104295279B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410569426.9A Active CN104295279B (en) | 2014-10-22 | 2014-10-22 | SAGD (steam assisted gravity drainage) steam injection system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822341B (en) * | 2016-06-12 | 2018-03-13 | 河南理工大学 | A kind of hypotonic anti-reflection system and method for coal seam supercritical carbon dioxide |
| CN111535798B (en) * | 2020-06-19 | 2020-11-10 | 四川奥达测控装置有限公司 | Metering method of steam metering system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963282U (en) * | 2010-12-08 | 2011-09-07 | 中国石油天然气股份有限公司 | Uniform dryness distributor for saturated vapor in oil field |
| CN202611673U (en) * | 2012-05-16 | 2012-12-19 | 江苏万兴石油机械阀门有限公司 | Steam pressure reducing and equal-dryness distribution device |
| CN103162282A (en) * | 2013-03-25 | 2013-06-19 | 中国石油天然气股份有限公司 | Method and system of producing superheated steam |
| CN204113254U (en) * | 2014-10-22 | 2015-01-21 | 中国石油天然气股份有限公司 | Sagd steam injection system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7448447B2 (en) * | 2006-02-27 | 2008-11-11 | Schlumberger Technology Corporation | Real-time production-side monitoring and control for heat assisted fluid recovery applications |
-
2014
- 2014-10-22 CN CN201410569426.9A patent/CN104295279B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963282U (en) * | 2010-12-08 | 2011-09-07 | 中国石油天然气股份有限公司 | Uniform dryness distributor for saturated vapor in oil field |
| CN202611673U (en) * | 2012-05-16 | 2012-12-19 | 江苏万兴石油机械阀门有限公司 | Steam pressure reducing and equal-dryness distribution device |
| CN103162282A (en) * | 2013-03-25 | 2013-06-19 | 中国石油天然气股份有限公司 | Method and system of producing superheated steam |
| CN204113254U (en) * | 2014-10-22 | 2015-01-21 | 中国石油天然气股份有限公司 | Sagd steam injection system |
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| Publication number | Publication date |
|---|---|
| CN104295279A (en) | 2015-01-21 |
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