CN104694099A - Surfactant/ polymer/alkali ternary compounded oil displacing agent - Google Patents
Surfactant/ polymer/alkali ternary compounded oil displacing agent Download PDFInfo
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- CN104694099A CN104694099A CN201310659798.6A CN201310659798A CN104694099A CN 104694099 A CN104694099 A CN 104694099A CN 201310659798 A CN201310659798 A CN 201310659798A CN 104694099 A CN104694099 A CN 104694099A
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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
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- 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
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Abstract
The invention relates to a surfactant/ polymer/alkali ternary compounded system applicable to crude oil yield improvement of Zhyangxi crude oil in the Shengli oil field. The surfactant/ polymer/alkali ternary compounded system is prepared from anionic surfactants of aliphatic alcohol polyoxyethylene ether sulfonates, hydrophobic modified polyacrylamide and sodium orthosilicate at a certain proportion. The system has the advantages that the yield of Zhyangxi crude oil in the Shengli oil field can be improved by 26.1 percent through being compared with that adopting water, the effect is good, and the Zhyangxi crude oil in Shengli oil field can be primarily used for improving the crude oil yield.
Description
Technical field
The present invention relates to the interfacial activity utilizing tensio-active agent, the high viscosity of polymkeric substance, and the ASP Oil-Displacing Technology of alkalescence, belong to field of oilfield chemistry.
Background of invention
Tensio-active agent plays a part very important in chemical flooding raising oil recovery factor, being suitable in tertiary oil recovery is aniorfic surfactant and nonionic surface active agent the most widely, though anion surfactant salt resistance is poor, but due to its high reactivity and certain temperature tolerance, or play a part very important in field of oilfield chemistry.Polymer flooding starts from the 1950's, and the amplitude improving recovery ratio can reach about 10%, is one and develops comparatively proven technique.It by water-soluble polymers is added to inject water increasing aqueous viscosity, improve mobility ratio, stable displacement forward position, expand injection water swept volume, be therefore also called viscous water flooding.Because polymer flooding can not reduce residual oil saturation usually, namely oil displacement efficiency can not be improved, so the residual oil saturation of postpolymer flood is still higher.It can improve the amplitude of irreducible oil output just in the scope of 2 ~ 12%.Although application surface surfactant flood can obtain very high irreducible oil recovery ratio, expensive due to tensio-active agent, and absorption is comparatively large, thus its use range is very limited.In addition, although caustic waterflooding can reduce oil water interfacial tension, produce wettability reversal, emulsification, emulsification carries secretly and the mechanism extraction irreducible oil such as rigid film dissolving, but because alkaline consumption is larger, its concentration range of alkali injected and mobility are difficult to the shortcomings such as control, up to now, the successful example of filed application is still little.In view of single polymer flooding, caustic waterflooding, surfactant flooding respectively have its own relative merits, by they conbined usage, utilize synergistic effect between chemical agent, to reach best oil displacement efficiency, Here it is various forms of combination chemical flooding.
The present invention is directed to Shengli Oil Field stake western oil field particular block characteristics of reservoirs, utilize Surfactant/Polymer/alkali ternary built, work out the optimum formula oil-displacing agent of this block oil phase applicable, be used for improving this block oil recovery.
Summary of the invention
The object of the invention is to the composite complementation utilizing tensio-active agent, polymkeric substance and alkali three kinds of advantages, prepare a kind ofly being suitable for and improving the ternary built system of the specific oil recovery in the western oil field of Shengli Oil Field stake.
In order to achieve the above object, this invention takes following technical scheme:
Technical scheme of the present invention is as follows:
Be applicable to Surfactant/Polymer/alkali ternary built system of the specific oil reservoir in the western oil field of Shengli Oil Field stake, it is characterized in that, be made up of under specified proportion anion surfactant A and polymer B and alkali, wherein:
Anion surfactant A is selected from: aliphatic alcohol polyoxyethylene sulfonate, fatty alcohol ether sulfonate, fatty sulfonate, low polysulfonate and sulfonated petro-leum and alkylbenzene sulfonate;
Polymer B is selected from: the polyacrylic acid of polyacrylic acid, polyacrylamide, sodium polyacrylate, hydrophobically modified, the polyacrylamide of hydrophobically modified;
Alkali C is selected from: one of sodium carbonate, salt of wormwood, sodium hydroxide, potassium hydroxide, sodium orthosilicate, tertiary sodium phosphate or its mixture.
In above-mentioned binary built system, polymer concentration is at 800 ~ 2000mg/L, and surfactant concentration is between 0.5% ~ 2%, and alkali concn remains between 0.5% ~ 1%.Adopt 17000ppm to simulate mineralized water preparation, wherein calcium-magnesium-containing is respectively 1200ppm and 800ppm.
The above-mentioned preparation method being applied to the ternary built system oil-displacing agent improving Shengli Oil Field stake western oil field particular block oil recovery factor of the present invention, step is as follows:
The mother liquor that selected anion surfactant A and polymer B prepare certain mass mark number to simulate mineralized water for base fluid is respectively stirred stand-by.According to a specific ratio surfactant A mother liquor and polymer B mother liquor mixed and use simulation mineralized water to be diluted in system polymer concentration between 800 ~ 2000mg/L, surfactant concentration is between 0.5% ~ 2%, then add quantitative alkali, its concentration is remained between 0.5 ~ 1%.
The composite oil-displacing agent of the ternary system that the present invention relates to can reach ultralow (10 with Shengli Oil Field stake western crude oil interfacial tension in wider surfactant concentration ranges
-3mN/m), and system viscosity can reach 72mPas, and utilizes simulation core to carry out oil displacement experiment, and its recovery ratio comparatively water drive can improve 26.1%, and effect is comparatively remarkable.
Accompanying drawing explanation
Fig. 1 chooses the polyacrylamide that polymkeric substance is hydrophobically modified, and concentration is 1200mg/L, and anion surfactant is aliphatic alcohol polyoxyethylene sulfonate, when concentration is respectively 0.7%, survey the minimum interfacial tension value of system, viscosity and oil recovery factor.
Embodiment
Below in conjunction with embodiment, the present invention is described further, but is not limited only to this.
Embodiment 1:
Ternary built oil-displacing agent forms: A, aliphatic alcohol polyoxyethylene sulfonate, the polyacrylamide of B, hydrophobically modified, C, sodium orthosilicate.
With 17000ppm, simulation mineralized water is base fluid, take a certain amount of anion surfactant aliphatic alcohol polyoxyethylene sulfonate, hydrophobically modified polymers, in preparation system, polymer concentration is 1200mg/L, surfactant concentration is the solution between 0.7%, then adds quantitative alkali, makes its concentration remain on 0.5%.
Embodiment 2:
Ternary built oil-displacing agent forms: A, aliphatic alcohol polyoxyethylene sulfonate, the polyacrylamide of B, hydrophobically modified, C, sodium orthosilicate.
With 17000ppm, simulation mineralized water is base fluid, take a certain amount of anion surfactant aliphatic alcohol polyoxyethylene sulfonate, hydrophobically modified polymers, in preparation system, polymer concentration is 1400mg/L, surfactant concentration is the solution between 0.8%, then adds quantitative alkali, makes its concentration remain on 0.5%.
Embodiment 3:
Ternary built oil-displacing agent forms: A, aliphatic alcohol polyoxyethylene sulfonate, the polyacrylamide of B, hydrophobically modified, C, sodium orthosilicate.
With 17000ppm, simulation mineralized water is base fluid, take a certain amount of anion surfactant aliphatic alcohol polyoxyethylene sulfonate, hydrophobically modified polymers, in preparation system, polymer concentration is 1600mg/L, surfactant concentration is the solution between 1%, then adds quantitative alkali, makes its concentration remain on 0.6%.
Embodiment 4:
Ternary built oil-displacing agent forms: A, aliphatic alcohol polyoxyethylene sulfonate, the polyacrylamide of B, hydrophobically modified, C, sodium orthosilicate.
With 17000ppm, simulation mineralized water is base fluid, take a certain amount of anion surfactant aliphatic alcohol polyoxyethylene sulfonate, hydrophobically modified polymers, in preparation system, polymer concentration is 1800mg/L, surfactant concentration is the solution between 1%, then adds quantitative alkali, makes its concentration remain on 1%.
As seen from Figure 1, the Surfactant/Polymer that the present invention relates to/alkali ternary built system oil-displacing agent, 1.82E-3mN/m can be low to moderate with the western crude oil oil water interfacial tension of Shengli Oil Field stake, viscosity can reach 72mPas, and utilize simulation core to carry out oil displacement experiment, its recovery ratio comparatively water drive can improve 26.1%, and effect is comparatively remarkable.
Above-described embodiment institute column data is only and clearly the invention example is described, and the restriction not to the invention embodiment.To those of ordinary skill in the art, other multi-form changes also can be made in above-mentioned citing basis.Here exhaustive without the need to also giving all embodiments.
Claims (3)
1. one kind is applicable to the preparation that the western crude oil of Shengli Oil Field stake improves the oil-displacing agent of oil recovery factor, it is characterized in that, can by near ultralow for Gudao area of Shengli Oilfield district crude oil interfacial tension, and there is the Surfactant/Polymer binary built oil-displacing agent of certain stability, it is characterized in that, be made up of anion surfactant A, polymer B and alkali C, anion surfactant A is selected from: aliphatic alcohol polyoxyethylene sulfonate, fatty alcohol ether sulfonate, fatty sulfonate, low polysulfonate and sulfonated petro-leum and alkylbenzene sulfonate; Polymer B is selected from: the polyacrylic acid of polyacrylic acid, polyacrylamide, sodium polyacrylate, hydrophobically modified, the polyacrylamide of hydrophobically modified; Alkali C is selected from: one of sodium carbonate, salt of wormwood, sodium hydroxide, potassium hydroxide, sodium orthosilicate, tertiary sodium phosphate or its mixture.
2. composite oil-displacing agent according to claim 1, with 17000ppm simulation mineralized water for base fluid is prepared, wherein calcium-magnesium content is respectively 1200ppm and 800ppm.Wherein surfactant concentration is 0.5% ~ 2%, and polymer concentration is at 800 ~ 2000mg/L, and alkali concn remains between 0.5% ~ 1%.
3. composite oil-displacing agent according to claim 1, selected anion surfactant is aliphatic alcohol polyoxyethylene sulfonate, concentration is 0.7%, polymkeric substance is the polyacrylamide of hydrophobically modified, concentration is 1200mg/L, and alkali is sodium orthosilicate, when concentration is 0.5%, system can obtain lower interfacial tension and viscosity higher, and recovery ratio can comparatively water extraction be high by 26.1%.Be applicable to the western crude oil of Shengli Oil Field stake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310659798.6A CN104694099A (en) | 2013-12-09 | 2013-12-09 | Surfactant/ polymer/alkali ternary compounded oil displacing agent |
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| CN201310659798.6A CN104694099A (en) | 2013-12-09 | 2013-12-09 | Surfactant/ polymer/alkali ternary compounded oil displacing agent |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974729A (en) * | 2015-06-10 | 2015-10-14 | 天津大港油田滨港集团博弘石油化工有限公司 | Ternary composite oil displacement agent |
| CN107652960A (en) * | 2017-08-18 | 2018-02-02 | 中国石油天然气股份有限公司 | Enhancing emulsifying combination flooding composition and its application containing sulfosalt surfactant |
| CN107794019A (en) * | 2016-09-05 | 2018-03-13 | 中国石油天然气股份有限公司 | A kind of compound oil displacement agent for controlling emulsification of crude oil degree and its application |
| CN110358518A (en) * | 2019-07-09 | 2019-10-22 | 合肥全景泰益新材料科技有限公司 | A kind of ASP ternary composite driving finish |
| CN114574185A (en) * | 2022-03-17 | 2022-06-03 | 河南大学 | Quaternary composite oil displacement system based on modified nano-silica and preparation method thereof |
| CN117603671A (en) * | 2023-11-30 | 2024-02-27 | 陕西铭锐石油科技有限公司 | Petroleum aid for improving petroleum recovery ratio and preparation method thereof |
-
2013
- 2013-12-09 CN CN201310659798.6A patent/CN104694099A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974729A (en) * | 2015-06-10 | 2015-10-14 | 天津大港油田滨港集团博弘石油化工有限公司 | Ternary composite oil displacement agent |
| CN107794019A (en) * | 2016-09-05 | 2018-03-13 | 中国石油天然气股份有限公司 | A kind of compound oil displacement agent for controlling emulsification of crude oil degree and its application |
| CN107794019B (en) * | 2016-09-05 | 2020-03-10 | 中国石油天然气股份有限公司 | Composite oil displacement agent for controlling crude oil emulsification degree and application thereof |
| CN107652960A (en) * | 2017-08-18 | 2018-02-02 | 中国石油天然气股份有限公司 | Enhancing emulsifying combination flooding composition and its application containing sulfosalt surfactant |
| CN107652960B (en) * | 2017-08-18 | 2020-09-08 | 中国石油天然气股份有限公司 | Enhanced emulsification type composite flooding composition containing sulfonate surfactant and application thereof |
| CN110358518A (en) * | 2019-07-09 | 2019-10-22 | 合肥全景泰益新材料科技有限公司 | A kind of ASP ternary composite driving finish |
| CN110358518B (en) * | 2019-07-09 | 2021-09-07 | 合肥全景泰益新材料科技有限公司 | ASP ternary composite oil displacement agent |
| CN114574185A (en) * | 2022-03-17 | 2022-06-03 | 河南大学 | Quaternary composite oil displacement system based on modified nano-silica and preparation method thereof |
| CN117603671A (en) * | 2023-11-30 | 2024-02-27 | 陕西铭锐石油科技有限公司 | Petroleum aid for improving petroleum recovery ratio and preparation method thereof |
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Application publication date: 20150610 |