CN103275679A - Viscosity stabilizing agent used for polymer flooding - Google Patents
Viscosity stabilizing agent used for polymer flooding Download PDFInfo
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- CN103275679A CN103275679A CN2013102369139A CN201310236913A CN103275679A CN 103275679 A CN103275679 A CN 103275679A CN 2013102369139 A CN2013102369139 A CN 2013102369139A CN 201310236913 A CN201310236913 A CN 201310236913A CN 103275679 A CN103275679 A CN 103275679A
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Abstract
A viscosity stabilizing agent used for polymer flooding is characterized by comprising components in percentage by mass as follows: 5%-8% of 2-mercapto benzimidazole, 2%-3% of hydroquinone, 10%-15% of sodium thiosulfate, 10%-15% of isothiazolinone, 5%-10% of glutaraldehyde, 6%-10% of isopropanol, 1%-2% of EDTA (ethylene diamine tetraacetic acid), and the balance of water. The viscosity stabilizing agent used for polymer flooding can improve viscosity stability of a polymer flooding system, the viscosity maintaining time is long, so that on the condition of oilfield wastewater preparation, the viscosity of the polymer flooding system maintains stable and is improved in a certain range, the field application effect of the polymer flooding is improved, the effect is remarkable, and the viscosity stabilizing agent is suitable for popularization and application.
Description
Technical field
The present invention relates to a kind of stablizer of polymkeric substance, be specifically related to a kind of viscosity stabilizer for polymer flooding.
Background technology
Viscosity stabilizer is to be applied to a kind of stablizer that polymer displacement of reservoir oil tech relates in the tertiary oil recovery field.At present, Daqing oil field has nearly 1/3rd well to adopt to annotate poly-exploitation, and its ultimate principle that improves oil recovery factor is to improve oil displacement efficiency, mainly is to realize by absorption, viscous effect.Polymer flooding is the important measures of oil-field development middle and later periods volume increase stable yields, and Daqing oil field has successively been implemented polymer flooding at apricot one, apricot three, apricot ten third-class blocks, has obtained to increase oily stable yields effect preferably.The problem that polymer displacement of reservoir oil tech exists is: polymkeric substance in delivery process owing to mechano-degradation and biological degradation reason, cause the polymer viscosity loss bigger, because the viscosity stability of aqueous solutions of polymers directly affects its oil displacement efficiency, the reducing of viscosity causes tar productivity to descend.How to take appropriate measures and improve polymer solution viscosity stability, to saving the number of polymers resource, reduce cost for oil production and be extremely important, but technology can't satisfy this demand at present, still need further technology innovation.
Summary of the invention
The invention provides a kind of viscosity stabilizer for polymer flooding in order to improve polymer flooding system viscosity stability, improve the viscosity of polymeric system.
The technical solution used in the present invention is: a kind of viscosity stabilizer for polymer flooding, it is characterized in that being constituted by following component, each component is by mass percentage: 2-mercaptobenzimidazole 5% ~ 8%, Resorcinol 2% ~ 3%, Sulfothiorine 10% ~ 15%, isothiazolinone 10% ~ 15%, glutaraldehyde 5% ~ 10%, Virahol 6% ~ 10%, EDTA1% ~ 2%, surplus are water.
The polymer viscosity retention rate is higher than 90% in the adding polymeric system.
Be applied in the polymer flooding tertiary oil recovery.
The present invention can improve the stability of polymer flooding system viscosity, the viscosity length of holding time, make polymer flooding system viscosity under the oilfield sewage preparation condition keep stable and have certain amplitude to improve, improve the polymer flooding effect of field application, effect obviously is suitable for applying.
The mechanism of action that is used for the viscosity stabilizer of polymer flooding of the present invention is: one, Sulfothiorine has deoxygenation ability preferably, the dissolved oxygen of being brought into during with elimination prepared polymer system, anti-block makes the stable viscosity of polymeric system to the Degradation of polymkeric substance in the polymeric system; Two, 2-mercaptobenzimidazole, Resorcinol can shift the free radical on the macromolecular chain, eliminate and catch and suppress the generation of oxygen, carbon radicals with its unique functional group's stable mechanism, thereby suppressed the thermal ageing degraded that oxygen, carbon radicals itself bring out.Three, isothiazolinone and glutaraldehyde have more intense germicidal action, to prevent sulphate reducing bacteria to polymer degradation, make the stable viscosity of polymeric system; Four, the effective complexing high-order metal ion of EDTA is eliminated metal ion polymkeric substance is curled, and makes the stable viscosity of polymeric system; Five, Virahol can effectively increase the polymer molecule chain rigidity, can improve polymer viscosity.
The present invention has multiple stable mechanism, with the viscosity of stable polymerization objects system; The polymeric system that is fit to clear water, degree of depth sewage, the preparation of common sewage is suitable for the water quality model with wide; Determine the working concentration 100 ~ 500mg/L of stablizer, it is wide to be suitable for concentration range; The stablizer adding technology is simple, and product is delivered to the scene with the form of the aqueous solution, and is easy to operate.
Embodiment
The invention will be further described below in conjunction with embodiment: each percentages of ingredients by mass percentage in the following experiment.
Embodiment 1:
2-mercaptobenzimidazole 5%, Resorcinol 3%, Sulfothiorine 10%, isothiazolinone 15%, glutaraldehyde 7%, Virahol 7%, EDTA1%, excess water to 50 ~ 60 ℃ of other components of adding, stir water heating temperature 30min and obtain the sticking steady agent of polymkeric substance.
Embodiment 2:
2-mercaptobenzimidazole 6%, Resorcinol 2%, Sulfothiorine 12%, isothiazolinone 10%, glutaraldehyde 10%, Virahol 10%, EDTA2%, excess water to 50 ~ 60 ℃ of other components of adding, stir water heating temperature 30min and obtain the sticking steady agent of polymkeric substance.
Embodiment 3:
2-mercaptobenzimidazole 8%, Resorcinol 2.5%, Sulfothiorine 15%, isothiazolinone 12%, glutaraldehyde 5%, Virahol 6%, EDTA1.5%, excess water to 50 ~ 60 ℃ of other components of adding, stir water heating temperature 30min and obtain the sticking steady agent of polymkeric substance.
The polymers soln that makes in above-described embodiment is protected sticking rate measure, experiment condition, method are as follows:
Experimental pharmacy is selected the supra polymer polyacrylamide dry powder of Daqing Refinery company, relative molecular mass 2600 * 104, solid content 〉=90% for use.
Experimental water, apricot one block deeply treating wastewater, salinity 5733.54mg/L; Common process sewage, salinity 5864.52mg/L.
It is the sticking steady agent of polymkeric substance that the embodiment of the invention 1 to 3 obtains that stablizer, the stablizer of employing are used in experiment.
Laboratory apparatus, LV-DVII type Brookfield viscometer, BD720 type thermostat container, electronic balance (0.01g, 0.0001g) etc.
Viscosimetric analysis, add test medicine respectively by 1500mg/L in clear water, common sewage and the degree of depth sewage and dispose three groups of experimental solutions, the sticking steady agent of polymkeric substance that embodiment is made adds the experimental solutions mixing by consumption 100 ~ 500mg/L, under 45 ℃ of conditions, constant temperature 40 days, during the test obtain viscosity results 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
| The clear water group | Add-on | Initial viscosity | Viscosity after 40 days | Protect sticking rate |
| Embodiment 1 | 100 | 51.9 | 46.8 | 90.17% |
| Embodiment 2 | 150 | 51.9 | 47.3 | 91.14% |
| Embodiment 3 | 150 | 51.9 | 47.5 | 91.52 |
Table 2
| Common sewage group | Add-on | Initial viscosity | Viscosity after 40 days | Protect sticking rate |
| Embodiment 1 | 200 | 53.7 | 50.1 | 93.30% |
| Embodiment 2 | 150 | 53.7 | 49.7 | 92.55% |
| Embodiment 3 | 400 | 53.7 | 50.8 | 94.60% |
Table 3
| Degree of depth sewage group | Add-on | Initial viscosity | Viscosity after 40 days | Protect sticking rate |
| Embodiment 1 | 300 | 53.4 | 50.1 | 93.82% |
| Embodiment 2 | 400 | 53.4 | 50.4 | 94.38% |
| Embodiment 3 | 500 | 53.4 | 50.3 | 94.19% |
The above results shows by adding the polymer viscosity stablizer, no matter is that the viscosity of the polymers soln of clear water, common sewage and the preparation of degree of depth sewage is protected sticking rate all more than 90%, and adaptability is comparatively extensive.Along with the increasing of stablizer add-on, the conservation rate of placing 40 days later polymer viscosities is significantly improved as can be seen.
Claims (3)
1. viscosity stabilizer that is used for polymer flooding, it is characterized in that being constituted by following component, each component is by mass percentage: 2-mercaptobenzimidazole 5% ~ 8%, Resorcinol 2% ~ 3%, Sulfothiorine 10% ~ 15%, isothiazolinone 10% ~ 15%, glutaraldehyde 5% ~ 10%, Virahol 6% ~ 10%, EDTA1% ~ 2%, surplus are water.
2. the described viscosity stabilizer for polymer flooding of claim 1 is characterized in that: add that the polymer viscosity retention rate is higher than 90% in the polymeric system.
3. the described viscosity stabilizer for polymer flooding of claim 1 is characterized in that: be applied in the polymer flooding tertiary oil recovery.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764634A (en) * | 2014-01-02 | 2015-07-08 | 中国石油化工股份有限公司 | Polyacrylamide aqueous solution mine-field sampling viscosity stabilizing agent, and using method |
| 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 |
| CN109762171A (en) * | 2019-01-28 | 2019-05-17 | 中石化石油工程技术服务有限公司 | Temperature sensitive polymer and preparation method thereof, drilling fluid flow pattern regulator composition, drilling fluid flow pattern regulator and preparation method thereof |
| 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 |
| CN112175598A (en) * | 2020-11-04 | 2021-01-05 | 广汉市华星新技术开发研究所（普通合伙） | Non-oxidative polymer cracking agent |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764634A (en) * | 2014-01-02 | 2015-07-08 | 中国石油化工股份有限公司 | Polyacrylamide aqueous solution mine-field sampling viscosity stabilizing agent, and using method |
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| 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 |
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| CN109762171A (en) * | 2019-01-28 | 2019-05-17 | 中石化石油工程技术服务有限公司 | Temperature sensitive polymer and preparation method thereof, drilling fluid flow pattern regulator composition, drilling fluid flow pattern regulator and preparation method thereof |
| CN109762171B (en) * | 2019-01-28 | 2021-08-17 | 中石化石油工程技术服务有限公司 | Temperature-sensitive polymer and preparation method thereof, drilling fluid flow pattern regulator composition, drilling fluid flow pattern regulator and preparation method thereof |
| 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 |
| CN112175598A (en) * | 2020-11-04 | 2021-01-05 | 广汉市华星新技术开发研究所（普通合伙） | Non-oxidative polymer cracking agent |
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Effective date of registration: 20160328 Address after: 163411 Grand Park, hi tech Zone, Daqing, Heilongjiang Patentee after: Daqing Huaying Chemical Industry Co., Ltd. Address before: 163000, No. three, 82 Village Road, Saertu District, Heilongjiang, Daqing Patentee before: Sun Anshun |