CN102516966A - Efficient blockage removing agent for water injection well - Google Patents
Efficient blockage removing agent for water injection well Download PDFInfo
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- CN102516966A CN102516966A CN2011103543190A CN201110354319A CN102516966A CN 102516966 A CN102516966 A CN 102516966A CN 2011103543190 A CN2011103543190 A CN 2011103543190A CN 201110354319 A CN201110354319 A CN 201110354319A CN 102516966 A CN102516966 A CN 102516966A
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Abstract
The invention discloses an efficient blockage removing agent for a water injection well. The efficient blockage removing agent is characterized in that components of the efficient blockage removing agent comprise, by weight, 12-16% of fluoroboric acid, 5-8% of phosphoric acid, 5-6% of sodium phosphate, 2-4% of sodium nitrite, 2-3% of potassium chloride, 15-20% of polyoxyethylene tert octyl phenol ether, 0.1-1% of glutamine, and the balance of water. The efficient blockage removing agent of the present invention has characteristics of good solubility and high permeability, wherein the wellhead pressure of the water injection well can be reduced by 15-25% when the addition amount of the efficient blockage removing agent is 0.1-0.5%.
Description
Technical field
The invention belongs to petrochemical complex and use the chemical article technical field, be specifically related to oil-field flooding treatment agent technical field, is the compound descaling and blockage relieving agent of a kind of WIW.
Background technology
In oilfield development process, through special WIW water is injected oil reservoir, keep or the recovery sand pressure, make oil reservoir that stronger motivating force arranged, to improve the recovery rate and the RF of oil reservoir.The water-retaining capacity of WIW depends primarily on reservoir permeability and water filling pump pressure, normally absorbs water for making oil reservoir, and the water filling pump pressure should be lower than the oil reservoir parting pressure.
Present part sandstone plum oil reservoir injection well; Because reservoir choke; The frequent generation of superpressure water filling is the hard nut to crack of puzzlement oilfield water extraction always, not only produces to the oil field and has caused serious potential safety hazard, and make the stable yields basis in oil field not firm; Field use is crossed many technological measures for many years, and effect is all undesirable.
Summary of the invention
To the deficiency that exists in the above-mentioned prior art, the invention provides the efficient unblocking agent of a kind of new type of water flooding, to solve the defective of traditional method, corrosion, dissolving tamper improve rate of permeation, increase water injection rate, thereby reach the purpose that improves oil recovery rate.
The technical scheme that the present invention adopted is:
The efficient unblocking agent of a kind of WIW; It is characterized in that; Each components based on weight percentage is: fluoroboric acid 12 ~ 16%, phosphoric acid 5 ~ 8%, sodium phosphate 5 ~ 6%, Sodium Nitrite 2 ~ 4%, Repone K 2 ~ 3%, polyoxyethylene uncle octylphenol ether 15 ~ 20%, Stimulina 0.1 ~ 1%, water surplus.
The efficient unblocking agent of described a kind of WIW; Each components based on weight percentage; Its preferred proportioning is: fluoroboric acid 15%, phosphoric acid 6%, sodium phosphate 5%, Sodium Nitrite 3%, Repone K 2%, polyoxyethylene uncle octylphenol ether 15%, Stimulina 0.3%, water surplus.
Another object of the present invention is the preparation method who proposes the efficient unblocking agent of a kind of WIW, comprises the steps:
1) polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warming up to 80 ℃;
2) water of elder generation's adding 10% under constantly stirring continues to stir 30min; ,
3) slowly be cooled to 55 ℃, adding phosphoric acid, sodium phosphate, Sodium Nitrite successively in proportion, continue to stir 30min;
4) add Repone K, Stimulina in proportion, continue to stop heating behind the stirring 30min;
5) stir on the limit that turns cold but, is cooled to normal temperature, promptly obtains profit descaling and blockage relieving agent of the present invention.
The beneficial effect that the present invention brings is:
Unblocking agent of the present invention is specially adapted to the pressurization augmented injection of water injection well in oil fields, helps corrosion, dissolving tamper, improves rate of permeation, and under the situation of dosage 0.1 ~ 0.5%, the WIW wellhead pressure descends 15 ~ 25 percentage points, and the water yield of injection remains unchanged.Promptly under the situation that volume of water input remains unchanged, wellhead pressure can descend 15 ~ 25%.
Embodiment:
The invention is further illustrated by the following examples, but the present invention is not limited to this.
Embodiment 1
Fluoroboric acid 15%, phosphoric acid 6%, sodium phosphate 5%, Sodium Nitrite 3%, Repone K 2%, polyoxyethylene uncle octylphenol ether 15%, Stimulina 0.3%, water surplus.
Polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warming up to 80 ℃; Elder generation adds 10% water under constantly stirring, and continues to stir 30min; Slowly be cooled to 55 ℃, adding phosphoric acid, sodium phosphate, Sodium Nitrite successively in proportion, continue to stir 30min; Add Repone K, Stimulina in proportion, continue to stop heating behind the stirring 30min; Stir on the limit that turns cold but, is cooled to normal temperature, promptly obtains profit descaling and blockage relieving agent of the present invention.
EE is oil extraction No.1 Factory in long celebrating oil field, and after certain WIW was used unblocking agent according to the invention, actual measurement WIW wellhead pressure descended 23.5%, and the water yield of injection is constant.
Embodiment 2
Fluoroboric acid 12%, phosphoric acid 5%, sodium phosphate 5%, Sodium Nitrite 4%, Repone K 3%, polyoxyethylene uncle octylphenol ether 18%, Stimulina 0.1%, water surplus.
Polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warming up to 80 ℃; Elder generation adds 10% water under constantly stirring, and continues to stir 30min; Slowly be cooled to 55 ℃, adding phosphoric acid, sodium phosphate, Sodium Nitrite successively in proportion, continue to stir 30min; Add Repone K, Stimulina in proportion, continue to stop heating behind the stirring 30min; Stir on the limit that turns cold but, is cooled to normal temperature, promptly obtains profit descaling and blockage relieving agent of the present invention.
EE is oil extraction No.1 Factory in long celebrating oil field, and after certain WIW was used unblocking agent according to the invention, actual measurement WIW wellhead pressure descended 19.8%, and the water yield of injection is constant.
Embodiment 3
Fluoroboric acid 16%, phosphoric acid 8%, sodium phosphate 6%, Sodium Nitrite 2%, Repone K 2%, polyoxyethylene uncle octylphenol ether 20%, Stimulina 1%, water surplus.
Polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warming up to 80 ℃; Elder generation adds 10% water under constantly stirring, and continues to stir 30min; Slowly be cooled to 55 ℃, adding phosphoric acid, sodium phosphate, Sodium Nitrite successively in proportion, continue to stir 30min; Add Repone K, Stimulina in proportion, continue to stop heating behind the stirring 30min; Stir on the limit that turns cold but, is cooled to normal temperature, promptly obtains profit descaling and blockage relieving agent of the present invention.
EE is oil extraction No.1 Factory in long celebrating oil field, and after certain WIW was used unblocking agent according to the invention, actual measurement WIW wellhead pressure descended 22.3%, and the water yield of injection is constant.
Claims (3)
1. efficient unblocking agent of WIW; It is characterized in that; Each components based on weight percentage is: fluoroboric acid 12 ~ 16%, phosphoric acid 5 ~ 8%, sodium phosphate 5 ~ 6%, Sodium Nitrite 2 ~ 4%, Repone K 2 ~ 3%, polyoxyethylene uncle octylphenol ether 15 ~ 20%, Stimulina 0.1 ~ 1%, water surplus.
2. the efficient unblocking agent of a kind of WIW according to claim 1; It is characterized in that; Each components based on weight percentage is: fluoroboric acid 15%, phosphoric acid 6%, sodium phosphate 5%, Sodium Nitrite 3%, Repone K 2%, polyoxyethylene uncle octylphenol ether 15%, Stimulina 0.3%, water surplus.
3. the preparation method of unblocking agent according to claim 1 or claim 2 is characterized in that comprising the steps:
1) polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warming up to 80 ℃;
2) water of elder generation's adding 10% under constantly stirring continues to stir 30min; ,
3) slowly be cooled to 55 ℃, adding phosphoric acid, sodium phosphate, Sodium Nitrite successively in proportion, continue to stir 30min;
4) add Repone K, Stimulina in proportion, continue to stop heating behind the stirring 30min;
5) stir on the limit that turns cold but, is cooled to normal temperature, promptly obtains profit descaling and blockage relieving agent of the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103543190A CN102516966A (en) | 2011-11-10 | 2011-11-10 | Efficient blockage removing agent for water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103543190A CN102516966A (en) | 2011-11-10 | 2011-11-10 | Efficient blockage removing agent for water injection well |
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| CN102516966A true CN102516966A (en) | 2012-06-27 |
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| CN2011103543190A Pending CN102516966A (en) | 2011-11-10 | 2011-11-10 | Efficient blockage removing agent for water injection well |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388070A (en) * | 2014-11-21 | 2015-03-04 | 天津大港油田滨港集团博弘石油化工有限公司 | Oil-well unblocking agent and method for preparing same |
| CN104962265A (en) * | 2015-06-17 | 2015-10-07 | 成都高普石油工程技术有限公司 | Reservoir blockage removing agent |
| CN108611085A (en) * | 2018-05-22 | 2018-10-02 | 东北石油大学 | One kind being directed to the low physical property section acid liquid for acid fracturing of SAGD wells |
| CN109913190A (en) * | 2019-04-12 | 2019-06-21 | 济南大学 | A kind of preparation method of clearing downhole polymer micelle cleaning agent |
| CN110003872A (en) * | 2019-04-12 | 2019-07-12 | 济南大学 | A kind of preparation method of environment-friendly double-effect oil well deblocking and descaling agent |
| CN110003871A (en) * | 2019-04-12 | 2019-07-12 | 济南大学 | A kind of preparation method of descaler for fast cleaning of oil wells |
| CN112877046A (en) * | 2021-01-18 | 2021-06-01 | 中国石油化工股份有限公司 | Deep thickened oil blocking remover for oil well as preparation method and use method thereof |
-
2011
- 2011-11-10 CN CN2011103543190A patent/CN102516966A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388070A (en) * | 2014-11-21 | 2015-03-04 | 天津大港油田滨港集团博弘石油化工有限公司 | Oil-well unblocking agent and method for preparing same |
| CN104962265A (en) * | 2015-06-17 | 2015-10-07 | 成都高普石油工程技术有限公司 | Reservoir blockage removing agent |
| CN108611085A (en) * | 2018-05-22 | 2018-10-02 | 东北石油大学 | One kind being directed to the low physical property section acid liquid for acid fracturing of SAGD wells |
| CN109913190A (en) * | 2019-04-12 | 2019-06-21 | 济南大学 | A kind of preparation method of clearing downhole polymer micelle cleaning agent |
| CN110003872A (en) * | 2019-04-12 | 2019-07-12 | 济南大学 | A kind of preparation method of environment-friendly double-effect oil well deblocking and descaling agent |
| CN110003871A (en) * | 2019-04-12 | 2019-07-12 | 济南大学 | A kind of preparation method of descaler for fast cleaning of oil wells |
| CN112877046A (en) * | 2021-01-18 | 2021-06-01 | 中国石油化工股份有限公司 | Deep thickened oil blocking remover for oil well as preparation method and use method thereof |
| CN112877046B (en) * | 2021-01-18 | 2024-01-05 | 中国石油化工股份有限公司 | Deep thickened oil blocking remover for oil well and preparation method and application method thereof |
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Application publication date: 20120627 |