CN103666409B - A kind of Polymer viscosity stabilizer - Google Patents
A kind of Polymer viscosity stabilizer Download PDFInfo
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- CN103666409B CN103666409B CN201310652936.8A CN201310652936A CN103666409B CN 103666409 B CN103666409 B CN 103666409B CN 201310652936 A CN201310652936 A CN 201310652936A CN 103666409 B CN103666409 B CN 103666409B
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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
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention provides a kind of Polymer viscosity stabilizer, comprise the component of following mass percent: thiocarbamide 40-50%, sulphite 20-30%, EDTA5-10%, surplus is water, described sulphite is S-WAT, potassium sulfite or ammonium sulphite, and described Polymer viscosity stabilizer employing is puddled technique and made, and is applied in polymer flooding tertiary oil recovery process.This invention viscosity stabilizer can improve produced water polymer solution viscosity stability, and the stable viscosity time is long, increases produced water polymer solution seepage resistance, improves the rheology control ability of produced water polymer solution and improves polymer flooding oil increasing effect.
Description
Technical field
The invention belongs to polymer stabilizer field, especially relate to a kind of Polymer viscosity stabilizer.
Background technology
Viscosity stabilizer is applied to a kind of stablizer that polymer displacement of reservoir oil tech in tertiary oil recovery field relates to.The ultimate principle adopting polymer injection technology to improve oil recovery factor is the difference according to oil and water mobility ratio in rock stratum, injection of polymer in oil reservoir, polymer viscosity is very large, large duct can be blocked, local water is stoped to flow to oil well, and can drive, carry crude stream to shaft bottom, thus improve the recovery ratio of crude oil.At present, polymer displacement of reservoir oil tech Problems existing is: polymkeric substance in delivery process due to mechano-degradation and biological degradation reason, cause polymer viscosity to lose comparatively large, because the viscosity stability of aqueous solutions of polymers directly affects its oil displacement efficiency, the reduction of viscosity causes tar productivity to decline.
Summary of the invention
The object of this invention is to provide a kind of Polymer viscosity stabilizer, 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 kind of Polymer viscosity stabilizer, comprise the component of following mass percent: thiocarbamide 40-50%, sulphite 20-30%, EDTA5-10%, surplus is water.
Further, described sulphite is S-WAT, potassium sulfite or ammonium sulphite.
Further, described Polymer viscosity stabilizer adopts and puddles technique and make.
Further, described Polymer viscosity stabilizer is applied in polymer flooding tertiary oil recovery process.
The mechanism of action that the present invention is used for Polymer viscosity stabilizer is: one, pass through hydrogen bond, Van der Waals force between thiocarbamide and polymkeric substance, and certain chemical action can be produced between polymkeric substance, the ability making 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 oxygen scavenging ability, the dissolved oxygen brought into when can eliminate prepared polymer system, and anti-block, to the Degradation of polymkeric substance in polymeric system, makes the stable viscosity of polymeric system; Three, EDTA can effective complexing high-order metal ion, eliminates the polymkeric substance that metal ion causes curling, makes the stable viscosity of polymeric system.
The advantage that the present invention has and positively effect are: this viscosity stabilizer can improve produced water polymer solution viscosity stability, the stable viscosity time is long, increase produced water polymer solution seepage resistance, improve the rheology control ability of produced water polymer solution 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 DEG C and adds other components, stirs 30min, obtains Polymer viscosity stabilizer.
Embodiment 2
Thiocarbamide 50%, S-WAT 30%, EDTA5%, excess water, heats water to 50-60 DEG C and adds other components, stirs 30min, obtains Polymer viscosity stabilizer.
Embodiment 3
Thiocarbamide 45%, potassium sulfite 25%, EDTA10%, excess water, heats water to 50-60 DEG C and adds other components, stirs 30min, obtains Polymer viscosity stabilizer.
Protect sticky rate to Polymer viscosity stabilizer solution obtained in above-described embodiment to 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 stabilizer 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, add experimental pharmacy respectively by 2000mg/L configure three groups of experimental solutions, Polymer viscosity stabilizer obtained for embodiment is added experimental solutions mixing by consumption 150 ~ 450mg/L, under 50 DEG C of conditions, constant temperature 50 days, period test obtains viscosity results as shown in table 1,2,3, and 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, it is no matter the polymers soln of clear water, common sewage or degree of depth waste water, after adding Polymer viscosity stabilizer, after 50 days, the guarantor of its viscosity glues rate all more than 90%, illustrate that this viscosity stabilizer is applied widely, can obviously improve polymer solution viscosity stability.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (2)
1. a Polymer viscosity stabilizer, is characterized in that: the component comprising following mass percent: thiocarbamide 40-50%, sulphite 20-30%, EDTA5-10%, surplus is water, and described sulphite is ammonium sulphite, and described Polymer viscosity stabilizer employing is puddled technique and made.
2. Polymer viscosity stabilizer according to claim 1, is characterized in that: described Polymer viscosity stabilizer is applied in polymer flooding tertiary oil recovery process.
Priority Applications (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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| 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 CN103666409A (en) | 2014-03-26 |
| CN103666409B true CN103666409B (en) | 2016-01-20 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| 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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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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