CN201090193Y - Nitrogen injection and drainage assisting device for heavy oil well - Google Patents
Nitrogen injection and drainage assisting device for heavy oil well Download PDFInfo
- Publication number
- CN201090193Y CN201090193Y CNU2007201729527U CN200720172952U CN201090193Y CN 201090193 Y CN201090193 Y CN 201090193Y CN U2007201729527 U CNU2007201729527 U CN U2007201729527U CN 200720172952 U CN200720172952 U CN 200720172952U CN 201090193 Y CN201090193 Y CN 201090193Y
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- oil
- oil pipe
- oil well
- stratum
- 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.)
- Expired - Lifetime
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 19
- 239000000295 fuel oil Substances 0.000 title claims description 5
- 238000002347 injection Methods 0.000 title description 2
- 239000007924 injection Substances 0.000 title description 2
- 239000003921 oil Substances 0.000 claims description 21
- 239000003129 oil well Substances 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000011261 inert gas Substances 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 239000010779 crude oil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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- Earth Drilling (AREA)
Abstract
The utility model provides a thick oil well is annotated nitrogen and is helped row device comprises sleeve pipe 1, oil pipe 2, primary pump joint 3, horn mouth 4, the utility model discloses owing to adopted at the intraductal oil pipe that has of cover, the horn mouth is connected under the oil pipe, and the centre joint has primary pump to connect, utilizes the nitrogen system to annotate the nitrogen device, directly prepares nitrogen gas from the air, pours into the oil well into through oil pipe and sleeve pipe annular space. The nitrogen is used as inert gas, has low density, viscosity and heat conductivity coefficient, is not easy to react with formation fluid and rock minerals, and has large compression coefficient and strong expansion capability. After the nitrogen enters the stratum, the volume of the nitrogen expands rapidly along with the reduction of the pressure of the stratum, and the energy of the stratum is supplemented, so that the oil displacement effect is achieved, and the recovery ratio of an oil well is improved. Simple structure, easy operation and is very suitable for field application.
Description
Technical field:
The utility model relates to the down-hole string that uses on a kind of oilfield, and particularly a kind of heavy oil wells is annotated nitrogen and helped arranging device.
Background technology:
Inject the increase of round along with the thick oil filling steam-stimulated well, quantity of steam increases, injection-production ratio descends by round, the water content of output liquid is on the increase, simultaneously underground energy is in debt serious, the input-output ratio that causes the high round in oil field to annotate the single steam injection oil recovery of vapour well is seriously lacked of proper care, and stratum energy constantly reduces, and some well has arrived the economic exploitation limit.Thereby influence is produced, and has reduced recovery ratio.
The utility model content:
The purpose of this utility model is to provide a kind of heavy oil wells to annotate nitrogen and helps arranging device, improves strata pressure, improves the produced liquid in oil well amount, reduces produced water cut, improves the thermally insulating the borehole effect, reduces heat waste, improves the thermal efficiency.Thereby the raising well oil output improves the steam incoming and outcoming well and annotates the vapour effect.
The utility model is achieved in that by sleeve pipe (1), oil pipe (2), a pump joint (3), horn mouth (4) to be formed, and oil pipe (2) is arranged in sleeve pipe (1), connects horn mouth (4) under the oil pipe (2), and indirect is pump joint (3) once.
The utility model has oil pipe owing to having adopted in sleeve pipe, connect horn mouth under the oil pipe, and indirect is the pump joint once, utilizes the nitrogen making and injection device, directly produces nitrogen from air, injects oil well by oil pipe and casing annulus.Nitrogen is as inert gas, and its density, viscosity, coefficient of thermal conductivity are all lower, is difficult for reacting with formation fluid and rock forming mineral, and compression coefficient is big, and swelliong power is strong.After nitrogen entered the stratum, along with strata pressure reduces, the nitrogen volume expanded rapidly, replenishes stratum energy, thereby plays displacement of reservoir oil effect, improves the oil well recovery ratio.Simple in structure, processing ease is well suited for The field.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
The specific embodiment:
The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.
As shown in the figure, the utility model is made up of sleeve pipe 1, oil pipe 2, pump joint 3, a horn mouth 4, and oil pipe 2 is arranged in sleeve pipe 1, oil pipe connect for 2 times horn mouth 4,, indirect is pump joint 3 once.From air, directly produce nitrogen, inject oil well, when nitrogen gos deep into, the steam that injects is pushed to the oil reservoir deep in the stratum, the heat of steam is fully absorbed by crude oil by oil pipe and casing annulus.In addition, interfacial tension between nitrogen and crude oil is 8.9dyn/cm, and the interfacial tension of water and crude oil is 30.5dyn/cm, the reduction of interfacial tension, will improve the sweep area of steam in the stratum greatly, improve the development effectiveness of steam soak and steam flooding, improve oil displacement efficiency, thereby improve oil recovery factor.
Claims (1)
1. a heavy oil wells is annotated nitrogen and is helped arranging device, sleeve pipe (1), oil pipe (2), a pump joint (3), horn mouth (4) are formed, it is characterized in that: oil pipe (2) is arranged in sleeve pipe (1), connect horn mouth (4) under the oil pipe (2), indirect is pump joint (3) once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201729527U CN201090193Y (en) | 2007-09-04 | 2007-09-04 | Nitrogen injection and drainage assisting device for heavy oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201729527U CN201090193Y (en) | 2007-09-04 | 2007-09-04 | Nitrogen injection and drainage assisting device for heavy oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090193Y true CN201090193Y (en) | 2008-07-23 |
Family
ID=39861953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201729527U Expired - Lifetime CN201090193Y (en) | 2007-09-04 | 2007-09-04 | Nitrogen injection and drainage assisting device for heavy oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090193Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871341A (en) * | 2010-06-13 | 2010-10-27 | 西安石油大学 | Method for improving thick oil recovery ratio |
| CN102071915A (en) * | 2010-12-15 | 2011-05-25 | 中国海洋石油总公司 | Annular space continuous nitrogen injection auxiliary heat insulation method for offshore thermal recovery |
| CN104895542A (en) * | 2015-06-17 | 2015-09-09 | 克拉玛依市昶禾科技有限公司 | Nitrogen heat energy oil production device and oil production method |
| CN105298445A (en) * | 2015-11-05 | 2016-02-03 | 中国石油天然气集团公司 | Method and device for reducing oil and gas well annulus belt pressure |
-
2007
- 2007-09-04 CN CNU2007201729527U patent/CN201090193Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871341A (en) * | 2010-06-13 | 2010-10-27 | 西安石油大学 | Method for improving thick oil recovery ratio |
| CN101871341B (en) * | 2010-06-13 | 2013-03-06 | 西安石油大学 | Method for improving thick oil recovery ratio |
| CN102071915A (en) * | 2010-12-15 | 2011-05-25 | 中国海洋石油总公司 | Annular space continuous nitrogen injection auxiliary heat insulation method for offshore thermal recovery |
| CN102071915B (en) * | 2010-12-15 | 2013-11-06 | 中国海洋石油总公司 | Annular space continuous nitrogen injection auxiliary heat insulation method for offshore thermal recovery |
| CN104895542A (en) * | 2015-06-17 | 2015-09-09 | 克拉玛依市昶禾科技有限公司 | Nitrogen heat energy oil production device and oil production method |
| CN105298445A (en) * | 2015-11-05 | 2016-02-03 | 中国石油天然气集团公司 | Method and device for reducing oil and gas well annulus belt pressure |
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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: 20080723 |