CN103666409A - Polymer viscosity stabilizer - Google Patents
Polymer viscosity stabilizer Download PDFInfo
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- CN103666409A CN103666409A CN201310652936.8A CN201310652936A CN103666409A CN 103666409 A CN103666409 A CN 103666409A CN 201310652936 A CN201310652936 A CN 201310652936A CN 103666409 A CN103666409 A CN 103666409A
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- polymer
- viscosity
- polymer viscosity
- stablizer
- sulfite
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
Abstract
The present invention provides a polymer viscosity stabilizer, which comprises, by mass, 40-50% of thiourea, 20-30% of sulfite, 5-10% of EDTA, and the balance of water, wherein the sulfite is sodium sulfite, potassium sulfite or ammonium sulfite, and the polymer viscosity stabilizer is prepared by using a mixing stirring process, and is applied in the polymer flooding tertiary oil recovery process. With the polymer viscosity stabilizer, viscosity stability of the sewage polymer solution can be improved, the viscosity stabilizing time is long, the seepage resistance of the sewage polymer solution can be increased, the rheology control capability of the sewage polymer solution can be improved, and the polymer flooding oil increase effect can be increased.
Description
Technical field
The invention belongs to polymer stabilizer field, especially relate to a kind of polymer viscosity stablizer.
Background technology
Viscosity stabilizer is to be applied to a kind of stablizer that in tertiary oil recovery field, polymer displacement of reservoir oil tech relates to.The ultimate principle that adopts polymer injection technology to improve oil recovery factor is according to the difference of oil and water mobility ratio in rock stratum, to injection of polymer in oil reservoir, polymer viscosity is very large, can stop up large duct, stop local water to flow to oil well, and can drive, carry crude stream to shaft bottom, thereby improve the recovery ratio of crude oil.At present, the problem that polymer displacement of reservoir oil tech exists is: polymkeric substance in delivery process due to mechano-degradation and biological degradation reason, cause polymer viscosity loss larger, because the viscosity stability of aqueous solutions of polymers directly affects its oil displacement efficiency, the reducing of viscosity causes tar productivity to decline.
Summary of the invention
The object of this invention is to provide a kind of polymer viscosity stablizer, improve polymer solution viscosity stability in tertiary oil recovery process.
For realizing above-mentioned goal of the invention, technical scheme of the present invention is as follows:
A polymer viscosity stablizer, comprises the component of following mass percent: thiocarbamide 40-50%, and sulphite 20-30%, EDTA5-10%, surplus is water.
Further, described sulphite is S-WAT, potassium sulfite or ammonium sulphite.
Further, described polymer viscosity stablizer adopts and puddles technique and make.
Further, described polymer viscosity stablizer is applied in polymer flooding tertiary oil recovery process.
The present invention for the mechanism of action of polymer viscosity stablizer is: one, between thiocarbamide and polymkeric substance, pass through hydrogen bond, Van der Waals force, and can produce certain chemical action between polymkeric substance, the ability that makes polymkeric substance carry water molecules increases, polymer molecular size increases, and the viscosity of polymers soln has the rising of certain amplitude; Two, sulphite has good deoxygenation ability, the dissolved oxygen of bringing in the time of eliminating prepared polymer system, and the Degradation of anti-block to polymkeric substance in polymeric system, makes the stable viscosity of polymeric system; Three, the effective complexing high-order metal ion of EDTA, eliminates the polymkeric substance that metal ion causes curling, makes the stable viscosity of polymeric system.
Advantage and positively effect that the present invention has are: this viscosity stabilizer can improve sewage polymer solution viscosity stability, the stable viscosity time is long, increase sewage polymer solution seepage resistance, improve the rheology control ability of sewage polymers soln and improve polymer flooding oil increasing effect.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but do not limit protection scope of the present invention.
Embodiment 1
Thiocarbamide 40%, S-WAT 20%, EDTA10%, excess water, heats water to 50-60 ℃ and adds other components, stirs 30min, obtains polymer viscosity stablizer.
Embodiment 2
Thiocarbamide 50%, S-WAT 30%, EDTA5%, excess water, heats water to 50-60 ℃ and adds other components, stirs 30min, obtains polymer viscosity stablizer.
Embodiment 3
Thiocarbamide 45%, potassium sulfite 25%, EDTA10%, excess water, heats water to 50-60 ℃ and adds other components, stirs 30min, obtains polymer viscosity stablizer.
The polymer viscosity stabiliser solution making in above-described embodiment is protected to sticky rate and measure, experiment condition, method are as follows:
Experimental pharmacy, selects relative molecular mass 2600 * 104, the supra polymer polyacrylamide dry powder of solid content >=92%.Experimental water, Dagang Oilfield deeply treating wastewater, salinity 5234.76mg/L; Common process sewage, salinity 5324.56mg/L.Experiment stablizer, the stablizer of employing is the polymer viscosity stablizer that the embodiment of the present invention 1 to 3 obtains.Laboratory apparatus, LV-DVII type Brookfield viscometer, BD720 type thermostat container, electronic balance (0.01g, 0.0001g) etc.Viscosimetric analysis, in clear water, common sewage and degree of depth sewage, by 2000mg/L, add respectively experimental pharmacy to configure three groups of experimental solutions, the polymer viscosity stablizer that embodiment is made adds experimental solutions to mix by consumption 150～450mg/L, under 50 ℃ of conditions, constant temperature 50 days, during test obtain viscosity results as shown in table 1,2,3, wherein table 1 is clear water group experimental data, table 2 is common sewage group experimental data, and table 3 is degree of depth sewage group experimental data.
Table 1
Table 2
Table 3
Above-mentioned experimental result shows, no matter be the polymers soln of clear water, common sewage or degree of depth waste water, after adding polymer viscosity stablizer, after 50 days, the sticky rate of the guarantor of its viscosity is all more than 90%, illustrate that this viscosity stabilizer is applied widely, can obviously improve polymer solution viscosity stability.
Above embodiments of the invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the present patent application scope and improvement etc., within all should still belonging to patent covering scope of the present invention.
Claims (4)
1. a polymer viscosity stablizer, is characterized in that: the component that comprises following mass percent: thiocarbamide 40-50%, and sulphite 20-30%, EDTA5-10%, surplus is water.
2. polymer viscosity stablizer according to claim 1, is characterized in that: described sulphite is S-WAT, potassium sulfite or ammonium sulphite.
3. according to the polymer viscosity stablizer described in claim 1-2 any one, it is characterized in that: described polymer viscosity stablizer employing is puddled technique and made.
4. according to the polymer viscosity stablizer described in claim 1-2 any one, it is characterized in that: described polymer viscosity stablizer is applied in polymer flooding tertiary oil recovery process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652936.8A CN103666409B (en) | 2013-12-04 | 2013-12-04 | A kind of Polymer viscosity stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310652936.8A CN103666409B (en) | 2013-12-04 | 2013-12-04 | A kind of Polymer viscosity stabilizer |
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| CN103666409A true CN103666409A (en) | 2014-03-26 |
| CN103666409B CN103666409B (en) | 2016-01-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105086978A (en) * | 2015-09-06 | 2015-11-25 | 华鼎鸿基采油技术服务（北京）有限公司 | Viscosity stabilizer and application thereof |
| CN108250359A (en) * | 2016-12-29 | 2018-07-06 | 天津博弘化工有限责任公司 | The preparation method of high salt tolerance POLYACRYLAMIDE FLOODING agent |
| CN109134751A (en) * | 2017-06-19 | 2019-01-04 | 天津博弘化工有限责任公司 | A kind of novel heatproof anti-salt polyacrylamide and its synthetic method |
| CN110724513A (en) * | 2019-10-17 | 2020-01-24 | 大庆石油管理局有限公司 | Polymer solution viscosity stabilizer for oil displacement and preparation method thereof |
| CN111607378A (en) * | 2020-06-22 | 2020-09-01 | 华辰环保能源(广州)有限责任公司 | Method for reducing viscosity loss of oil field polymer solution by using bacterial activity inhibitor |
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| CN102372807A (en) * | 2010-08-23 | 2012-03-14 | 中国石油化工股份有限公司 | Preparation method of heat-resistance and salt-tolerance anionic polyacrylamide for oil displacement |
| CN102373050A (en) * | 2010-08-23 | 2012-03-14 | 中国石油化工股份有限公司 | Composition for improving recovery ratio of tertiary oil recovery and preparation method thereof |
| CN102559158A (en) * | 2010-12-24 | 2012-07-11 | 中国石油天然气股份有限公司 | Acidic gel plugging agent for oil well |
| CN102952532A (en) * | 2011-08-19 | 2013-03-06 | 中国石油化工股份有限公司 | Method for improving viscosity stability of oil field polymer flooding |
| CN103421137A (en) * | 2012-05-16 | 2013-12-04 | 中国石油化工股份有限公司 | Preparation method of high temperature resistance polyacrylamide for oil displacement |
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2013
- 2013-12-04 CN CN201310652936.8A patent/CN103666409B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102372807A (en) * | 2010-08-23 | 2012-03-14 | 中国石油化工股份有限公司 | Preparation method of heat-resistance and salt-tolerance anionic polyacrylamide for oil displacement |
| CN102373050A (en) * | 2010-08-23 | 2012-03-14 | 中国石油化工股份有限公司 | Composition for improving recovery ratio of tertiary oil recovery and preparation method thereof |
| CN102559158A (en) * | 2010-12-24 | 2012-07-11 | 中国石油天然气股份有限公司 | Acidic gel plugging agent for oil well |
| CN102952532A (en) * | 2011-08-19 | 2013-03-06 | 中国石油化工股份有限公司 | Method for improving viscosity stability of oil field polymer flooding |
| CN103421137A (en) * | 2012-05-16 | 2013-12-04 | 中国石油化工股份有限公司 | Preparation method of high temperature resistance polyacrylamide for oil displacement |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105086978A (en) * | 2015-09-06 | 2015-11-25 | 华鼎鸿基采油技术服务（北京）有限公司 | Viscosity stabilizer and application thereof |
| CN105086978B (en) * | 2015-09-06 | 2018-07-20 | 华鼎鸿基采油技术服务（北京）有限公司 | A kind of viscosity stabiliser and its application |
| CN108250359A (en) * | 2016-12-29 | 2018-07-06 | 天津博弘化工有限责任公司 | The preparation method of high salt tolerance POLYACRYLAMIDE FLOODING agent |
| CN109134751A (en) * | 2017-06-19 | 2019-01-04 | 天津博弘化工有限责任公司 | A kind of novel heatproof anti-salt polyacrylamide and its synthetic method |
| CN110724513A (en) * | 2019-10-17 | 2020-01-24 | 大庆石油管理局有限公司 | Polymer solution viscosity stabilizer for oil displacement and preparation method thereof |
| CN111607378A (en) * | 2020-06-22 | 2020-09-01 | 华辰环保能源(广州)有限责任公司 | Method for reducing viscosity loss of oil field polymer solution by using bacterial activity inhibitor |
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| CN103666409B (en) | 2016-01-20 |
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