CN202483541U - Oil production system for heavy oil reservoir - Google Patents
Oil production system for heavy oil reservoir Download PDFInfo
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- CN202483541U CN202483541U CN2012201428003U CN201220142800U CN202483541U CN 202483541 U CN202483541 U CN 202483541U CN 2012201428003 U CN2012201428003 U CN 2012201428003U CN 201220142800 U CN201220142800 U CN 201220142800U CN 202483541 U CN202483541 U CN 202483541U
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Abstract
The utility model discloses an oil production system for a heavy oil reservoir. The oil production system comprises a horizontal well and a vertical well, wherein the horizontal section of the horizontal well is communicated with the vertical shaft at the same oil reservoir layer; and the horizontal well and the vertical well are in a shape of U; a steam injection pipe is arranged in the horizontal well, and while a lifting pipe column is arranged in the vertical well; an insulating layer is arranged on the external surface of the steam injection pipe; a heating space is formed between the insulating layer and the external wall of the steam injection pipe; and an electric heating device is arranged in the heating space. The oil production system has simplicity in structure, and can inject gas to achieve a synergistic effect along with electrical heating, thus improving the heating effect and raising the oil production efficiency.
Description
Technical field
The utility model relates to oil recovery technique field, oil field, is a kind of heavy crude reservoir oil extraction system concretely.
Background technology
At present,, adopt horizontal well can significantly increase the oil reservoir drainage area, improve the oil field development effect, so the effect of horizontal well in oil field development is more and more important along with the development of petroleum industry.But the lifting process of existing horizontal well steam soak mode is because of receiving the influence of slope; Sucker rod pump lifting depth of setting is limited; And the degree of depth too small can influence the submergence of sucker rod pump influence pump efficiency then, thereby increased the eccentric wear of lift tube column jecket bar, influence application life.In addition, though the general heat extraction by steam injection technology that adopts in the thickened oil recovery process is this method technology maturation; Can drive crude oil flows to the bottom producing well; Assisted gravity drainage, but heat waste is big, reduces a little less than the viscosity of crude effect; And the oil-water two-phase flow behind the vapor condensation, influence heavy oil production; Another kind method is through electric-heating technology; Though electric-heating technology can improve heavy oil production, simple electric-heating technology mainly relies on heating to reduce viscosity of thickened oil and gravity driving mechanism, and this method is limited by the electrical heating scope; Exploitation rate be limited in scope, influence production efficiency.
The utility model content
The purpose of the utility model is exactly the defective that exists to prior art, provides a kind of simple in structure, but injecting gas and electrical heating synergy, thus improve heats, improve the heavy crude reservoir oil extraction system of oil production rate.
Its technical scheme is: the heavy crude reservoir oil extraction system, comprise horizontal well and straight well, and the horizontal segment of said horizontal well is connected in same reservoir layer position with said straight well; And said horizontal well and said straight well are the U type; Be provided with the notes steam pipe in the said horizontal well, be provided with the lifting tubing string in the said straight well, the external surface of said notes steam pipe is provided with insulating layer; Form heating space between said insulating layer and the notes steam pipe outer wall, be provided with electric heater unit in the said heating space.
Said notes steam pipe comprises instlated tubular, packer, punching screen casing and starting taper plug, and said instlated tubular extends axially in said horizontal well, and the inserting end of said instlated tubular is connected with packer, punching screen casing and starting taper plug in turn.
The outer wall of said notes steam pipe is that insulation materials is processed, the resistive heater of said electric heater unit for being connected with external power source.
After having adopted technique scheme, the beneficial effect that the utility model is obtained is: the utility model is simple in structure, but injecting gas and electrical heating synergy, thus improve heats, improved oil production rate.
Description of drawings
Accompanying drawing is the structural representation of the utility model embodiment.
The specific embodiment
Shown in accompanying drawing, the heavy crude reservoir oil extraction system comprises horizontal well 1 and straight well 2; The horizontal segment of said horizontal well 1 is connected in same reservoir layer position with said straight well 2, and said horizontal well 1 is the U type with said straight well 2, is provided with in the said horizontal well 1 and annotates steam pipe 3; Be provided with lifting tubing string 4 in the said straight well 2; The external surface of said notes steam pipe 3 is provided with insulating layer 5, forms heating space 6 between said insulating layer 5 and notes steam pipe 3 outer walls, is provided with electric heater unit 7 in the said heating space 6.
Be connected through horizontal well 1 and straight well 2, utilize horizontal well 1 can increase drainage area, improve producing degree of reservoir, utilize straight well 2 to carry out lifting production, can effectively prevent lift tube column jecket bar eccentric wear, improved pump efficiency.During work,, in horizontal well 1, carry out steam soak through annotating vapour in the notes steam pipe 3 in horizontal well 1; Form pneumatic jack on oil reservoir top, improve formation pressure, and can reduce the viscosity of crude of oil reservoir; Drive crude oil and flow assisted gravity drainage to the lower abdomen producing well; Open 7 pairs of crude oil of electric heater unit simultaneously and heat, further auxiliary reduction viscosity of crude, and the diffusion velocity of quickening injecting gas, thus increase the heating volume, carry out gravity drainage better, thereby improved production efficiency.
Said notes steam pipe 3 comprises instlated tubular 8, packer 9, punching screen casing 10 and starting taper plug 11, and said instlated tubular 8 extends axially in said horizontal well 1, and the inserting end of said instlated tubular 8 is connected with packer 9, punching screen casing 10 and starting taper plug 11 in turn.Through this structure convenience steam in jection in horizontal well 1 oil reservoir is heated, reduced the viscosity of crude of oil reservoir, and to the oil reservoir makeup energy.
The outer wall of said notes steam pipe 3 is that insulation materials is processed, the resistive heater of said electric heater unit 7 for being connected with external power source.
The utility model is simple in structure, but injecting gas and electrical heating synergy, thus improve heats, improved oil production rate.
Claims (3)
1. the heavy crude reservoir oil extraction system comprises horizontal well and straight well, and the horizontal segment of said horizontal well is connected in same reservoir layer position with said straight well; And said horizontal well and said straight well are the U type; It is characterized in that: be provided with the notes steam pipe in the said horizontal well, be provided with the lifting tubing string in the said straight well, the external surface of said notes steam pipe is provided with insulating layer; Form heating space between said insulating layer and the notes steam pipe outer wall, be provided with electric heater unit in the said heating space.
2. heavy crude reservoir oil extraction system according to claim 1; It is characterized in that: said notes steam pipe comprises instlated tubular, packer, punching screen casing and starting taper plug; Said instlated tubular extends axially in said horizontal well, and the inserting end of said instlated tubular is connected with packer, punching screen casing and starting taper plug in turn.
3. heavy crude reservoir oil extraction system according to claim 1 is characterized in that: the outer wall of said notes steam pipe is that insulation materials is processed, the resistive heater of said electric heater unit for being connected with external power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201428003U CN202483541U (en) | 2012-03-28 | 2012-03-28 | Oil production system for heavy oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201428003U CN202483541U (en) | 2012-03-28 | 2012-03-28 | Oil production system for heavy oil reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483541U true CN202483541U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201428003U Expired - Fee Related CN202483541U (en) | 2012-03-28 | 2012-03-28 | Oil production system for heavy oil reservoir |
Country Status (1)
| Country | Link |
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| CN (1) | CN202483541U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114836A (en) * | 2013-02-21 | 2013-05-22 | 中国海洋石油总公司 | Steam heavy oil thermal recovery equipment and method thereof |
| CN103291244A (en) * | 2013-06-21 | 2013-09-11 | 沈阳摩根能源装备有限公司 | Method for compensating thermal energy of horizontal well mining heavy oil reservoirs in large power and subsection mode in pit |
| CN104373096A (en) * | 2014-10-29 | 2015-02-25 | 中国石油天然气股份有限公司 | Electric-steam integrated steam injection system and steam injection method thereof |
| WO2015085674A1 (en) * | 2013-12-12 | 2015-06-18 | 于文英 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
| CN106246113A (en) * | 2016-08-15 | 2016-12-21 | 中国石油天然气股份有限公司 | Tubular column structure of underground electric heating horizontal injection well |
| CN106285500A (en) * | 2016-08-15 | 2017-01-04 | 中国石油天然气股份有限公司 | Tubular column structure of underground electric heating vertical injection well |
| CN107558978A (en) * | 2017-08-28 | 2018-01-09 | 新疆国利衡清洁能源科技有限公司 | Thickened oil recovery system and method |
-
2012
- 2012-03-28 CN CN2012201428003U patent/CN202483541U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114836A (en) * | 2013-02-21 | 2013-05-22 | 中国海洋石油总公司 | Steam heavy oil thermal recovery equipment and method thereof |
| CN103114836B (en) * | 2013-02-21 | 2016-03-23 | 中国海洋石油总公司 | A kind of Apparatus for () and method therefor of steam heavy oil heat production |
| CN103291244A (en) * | 2013-06-21 | 2013-09-11 | 沈阳摩根能源装备有限公司 | Method for compensating thermal energy of horizontal well mining heavy oil reservoirs in large power and subsection mode in pit |
| WO2015085674A1 (en) * | 2013-12-12 | 2015-06-18 | 于文英 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
| RU2653203C2 (en) * | 2013-12-12 | 2018-05-07 | Веньчжинг Чжу | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
| CN104373096A (en) * | 2014-10-29 | 2015-02-25 | 中国石油天然气股份有限公司 | Electric-steam integrated steam injection system and steam injection method thereof |
| CN106246113A (en) * | 2016-08-15 | 2016-12-21 | 中国石油天然气股份有限公司 | Tubular column structure of underground electric heating horizontal injection well |
| CN106285500A (en) * | 2016-08-15 | 2017-01-04 | 中国石油天然气股份有限公司 | Tubular column structure of underground electric heating vertical injection well |
| CN106246113B (en) * | 2016-08-15 | 2018-09-04 | 中国石油天然气股份有限公司 | Tubular column structure of underground electric heating horizontal injection well |
| CN106285500B (en) * | 2016-08-15 | 2018-09-04 | 中国石油天然气股份有限公司 | Tubular column structure of underground electric heating vertical injection well |
| CN107558978A (en) * | 2017-08-28 | 2018-01-09 | 新疆国利衡清洁能源科技有限公司 | Thickened oil recovery system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20140328 |