CN101955767B - Gemini surfactant for tertiary oil recovery chemical oil-displacing agent and preparation method thereof - Google Patents
Gemini surfactant for tertiary oil recovery chemical oil-displacing agent and preparation method thereof Download PDFInfo
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- CN101955767B CN101955767B CN 201010253729 CN201010253729A CN101955767B CN 101955767 B CN101955767 B CN 101955767B CN 201010253729 CN201010253729 CN 201010253729 CN 201010253729 A CN201010253729 A CN 201010253729A CN 101955767 B CN101955767 B CN 101955767B
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Abstract
The invention discloses a gemini surfactant for a tertiary oil recovery chemical oil-displacing agent. The gemini surfactant has the structural formula shown in the specifications, wherein R1 and R2 are alkyl with 11 to 23 carbon atoms respectively. The surfactant of the invention has the advantages of single use without adding an alkali, harmlessness to a stratum, stable property, high capacity of reducing the oil/water interfacial tension and ensuring ultralow interfacial tension of 10<-3> to 10<-4>mN/m of crude oil/water in a wider range, and ideal oil displacing effect. The problem that the oil displacing efficiency of the conventional oil-displacing agent is reduced due to chromatographic separation is solved.
Description
Technical field:
The present invention relates to the used a kind of auxiliary agent in oil extraction in oil field field, especially a kind of Gemini surface active agent for the tertiary oil recovery chemical oil displacement agent and preparation method thereof.
Background technology:
The many oil fields of China enter development late stage successively, and the application of tertiary oil recovery technology is paid attention to widely.In the latter stage of waterflooding, irreducible oil be with static spherical distribution in the hole of reservoir rocks.Reducing interfacial tension is to force the mobile sole mode of irreducible oil that is trapped in the porous medium, also is the effective ways that can increase substantially oilfield exploitation efficient.Oil-displacing agent must be reduced to 10 with oil water interfacial tension
-3MN/m or the lower order of magnitude, otherwise will be without practical value.Because simple tensio-active agent is difficult to oil water interfacial tension is reduced to 10
-3Below the mN/m, therefore, the tensio-active agent that uses in the chemical flooding at present, great majority add the compound of the auxiliary agent such as alkaline agent for petroleum sodium sulfonate, petroleum carboxylate.Yet adding alkaline agent can make the pH value raise, so that the expansion of clay mineral aggravation, water sensitivity strengthens, and the commutative high-valence cationic effect in sulfonated petro-leum and local water and the clay forms the sulfonate precipitation, fouling etc. in the stratum, thereby larger injury is caused on the stratum, seriously influenced the Sustainable Exploitation of oil.And the consumption of sodium hydroxide is generally all higher, has also increased the cost of winning of oil, has affected the economic benefit of oil production.In addition, because compound is mixture, when multi-component system flows in oil reservoir, chromatographic separation may occur between each composition of oil-displacing agent, therefore thereby can destroy the integrity of original formulation system, meeting is so that established ultra low interfacial tension disappears so that oil displacement efficiency reduction.
Summary of the invention:
In order to solve the problem that exists in the background technology, the invention provides a kind of Gemini surface active agent for the tertiary oil recovery chemical oil displacement agent and preparation method thereof, tensio-active agent of the present invention can use separately, need not add alkali, thereby to the stratum without injury, and stable performance has the ability of good reduction oil/water termination tension force, can guarantee in wider scope that crude oil/water has ultra low interfacial tension 10
-3～10
-4MN/m reaches desirable oil displacement efficiency.And overcome the problem that oil displacement efficiency that existing oil-displacing agent causes because of the chromatographic separation phenomenon descends.
The technical scheme of employing of the present invention is: the structural formula that should be used for the Gemini surface active agent of tertiary oil recovery chemical oil displacement agent is:
Wherein: R
1, R
2Be respectively C
11～C
23Alkyl.
The preparation method of above-mentioned Gemini surface active agent comprises the following steps, each raw material by weight ratio:
The first step is 105 parts～140 parts N, N-dimethylated propyl diethylenetriamine and 200 parts～370 parts long alkyl chain length lipid acid, and in 140 ℃～200 ℃, the reaction times is 180～360min, carries out amidate action;
Second step reacts 180～300min, the ethanol evaporation solvent under 280 parts～450 parts the first step products and 50 parts～60 parts ethylene dichloride are refluxed in 350 parts～500 parts ethanol;
The 3rd step was reacted 480～600min under 310 parts～480 parts second step products and 120 parts～155 parts sodium chloroacetates are refluxed in 400 parts～600 parts ethanol, the filtration desalination, and the ethanol evaporation solvent namely gets Gemini surface active agent.
Above-mentioned long alkyl chain length acid is one or more in laurostearic acid, TETRADECONIC ACID, palmitic acid, stearic acid, 20 acid, the tetracosanoic acid.
The present invention has following beneficial effect: Gemini surface active agent of the present invention, and it is low that it has toxicity, and biodegradability is good, good anti-salt, the characteristics such as high temperature resistant.The oil-displacing agent of the binary combination flooding oil systems of being prepared by the Gemini surface active agent of the method preparation has excellent interfacial tension, emulsification and Oil Displacing Capacity, can form ultra low interfacial tension 10 with crude oil
-3～10
-4MN/m is used for binary compound system recovery ratio average specific water drive and improves more than 18%.
Embodiment:
The invention will be further described below in conjunction with embodiment:
The preparation of embodiment 1, Gemini surface active agent:
The first step is 115gN, N-dimethylated propyl diethylenetriamine and 284g stearic acid, and in 160 ℃, the reaction times is 240min, carries out amidate action.Second step reacts 210min under 372g the first step product and 51g ethylene dichloride are refluxed in the ethanol of 400g.The ethanol evaporation solvent.The 3rd step was reacted 540min under 398g second step product and 130g sodium chloroacetate are refluxed in the ethanol of 400g.Filter desalination, the ethanol evaporation solvent.Namely get fattyamidopropyl betaine type Gemini surface active agent.
The preparation of embodiment 2, Gemini surface active agent:
The first step is 112gN, N-dimethylated propyl diethylenetriamine and 228g palmitic acid, and in 150 ℃, the reaction times is 180min, carries out amidate action.Second step reacts 210min under 315g the first step product and 50g ethylene dichloride are refluxed in the ethanol of 350g.The ethanol evaporation solvent.
The 3rd step was reacted 480min under 320g second step product and 126g sodium chloroacetate are refluxed in the ethanol of 400g.Filter desalination, the ethanol evaporation solvent.Namely get fattyamidopropyl betaine type Gemini surface active agent.
The preparation of embodiment 3, Gemini surface active agent:
The first step is 132gN, N-dimethylated propyl diethylenetriamine, 40g laurostearic acid and 290g tetracosanoic acid, and in 195 ℃, the reaction times is 360min, carries out amidate action.Second step reacts 210min under 414g the first step product and 53g ethylene dichloride are refluxed in the ethanol of 500g.The ethanol evaporation solvent.The 3rd step was reacted 600min under 430g second step product and 150g sodium chloroacetate are refluxed in the ethanol of 600g.Filter desalination, the ethanol evaporation solvent.Namely get fattyamidopropyl betaine type Gemini surface active agent.
The preparation of embodiment 4, Gemini surface active agent:
The first step is 126gN, N-dimethylated propyl diethylenetriamine, 70g TETRADECONIC ACID and 218g 20 acid, and in 185 ℃, the reaction times is 360min, carries out amidate action.Second step reacts 300min under 372g the first step product and 52g ethylene dichloride are refluxed in the ethanol of 500g.The ethanol evaporation solvent.The 3rd step was reacted 600min under 400g second step product and 148g sodium chloroacetate are refluxed in the ethanol of 600g.Filter desalination, the ethanol evaporation solvent.Namely get fattyamidopropyl betaine type Gemini surface active agent.
The preparation of embodiment 5, Gemini surface active agent:
The first step is 126gN, N-dimethylated propyl diethylenetriamine, 128g palmitic acid and 145g stearic acid, and in 170 ℃, the reaction times is 240min, carries out amidate action.Second step reacts 240min under 357g the first step product and 52g ethylene dichloride are refluxed in the ethanol of 500g.The ethanol evaporation solvent.The 3rd step was reacted 600min under 385g second step product and 140g sodium chloroacetate are refluxed in the ethanol of 500g.Filter desalination, the ethanol evaporation solvent.Namely get Gemini surface active agent.Namely get fattyamidopropyl betaine type Gemini surface active agent.
Embodiment 6,
The Gemini surface active agent of present method preparation is applied to the binary combination flooding experiment: be re-dubbed binary combination flooding by above-mentioned synthetic Gemini surface active agent sample and polymkeric substance, experimental result sees Table 1.The interfacial tension condition determination: measuring temperature is 45 ℃, and determining instrument is that ' TEXAS-500 rotates interfacial tensimeter.
Table 1
The experiment profit is Daqing Oil Factory deeply treating wastewater and dewatered oil.It is 1200mg/L that superelevation is divided polymer concentration, and the binary compound system viscosity of preparation is 54.1mPaS.Gemini surface active agent of the present invention can be used as the built agent of binary combination flooding as can be seen from the above table, be applied among the tertiary oil recovery, and the crude oil of Daqing oil field different blocks all can form ultra low interfacial tension.
The binary system prescription:
1. tensio-active agent is the sample of the embodiment of the invention 1 to 5.
2. polymkeric substance is that superelevation is divided polyacrylamide, and molecular weight is 1500～5,000 ten thousand.
3. the binary compound system polymer concentration of preparation is 1200mg/L.
4. the binary compound system viscosity of preparation is 54.1mPas.
Embodiment 7,
Estimate the oil displacement efficiency of binary compound system with natural core by model test of the reservoir sweep, the results are shown in following table 2.
Table 2
Experiment is Daqing oil field oil extraction No.1 Factory dewatered oil with oil, driving water is Daqing oil field oil extraction No.1 Factory deeply treating wastewater, the binary system polymer concentration is the polymers soln of 1200ppm, it is 0.3% that adding embodiment 2 synthetic tensio-active agents make its content, stirring makes its solution even, is mixed with Binary Liquid.
Being used for binary compound system recovery ratio average specific water drive from natural core displacement of reservoir oil evaluation result proof surfactant product of the present invention improves more than 18%.
Claims (4)
1. Gemini surface active agent that is used for the tertiary oil recovery chemical oil displacement agent, this Gemini surface active agent structural formula is:
Wherein: R
1, R
2Be respectively C
11～C
23Alkyl.
2. the preparation method of Gemini surface active agent claimed in claim 1, the method comprise the following steps, each raw material by weight ratio:
The first step is 105 parts～140 parts N, N-dimethylated propyl diethylenetriamine and 200 parts～370 parts long alkyl chain length lipid acid, and in 140 ℃～200 ℃, the reaction times is 180～360min, carries out amidate action;
Second step reacts 180～300min, the ethanol evaporation solvent under 280 parts～450 parts the first step products and 50 parts～60 parts ethylene dichloride are refluxed in 350 parts～500 parts ethanol;
The 3rd step was reacted 480～600min under 310 parts～480 parts second step products and 120 parts～155 parts sodium chloroacetates are refluxed in 400 parts～600 parts ethanol, the filtration desalination, and the ethanol evaporation solvent namely gets Gemini surface active agent.
3. the preparation method of Gemini surface active agent according to claim 2, it is characterized in that: described long alkyl chain length lipid acid is one or more in laurostearic acid, TETRADECONIC ACID, palmitic acid, stearic acid, 20 acid, the tetracosanoic acid.
4. Gemini surface active agent and the polymkeric substance application in tertiary oil recovery that forms the binary compound system for the tertiary oil recovery chemical oil displacement agent claimed in claim 1.
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| CN102977873A (en) * | 2012-12-24 | 2013-03-20 | 江南大学 | Method for preparing diamide glycine betaine surfactant for tertiary oil recovery and application thereof |
| CN103289669B (en) * | 2013-05-28 | 2016-10-05 | 四川安东油气工程技术服务有限公司 | Fracturing fluid surfactant and preparation method thereof and fracturing fluid |
| CN103421473A (en) * | 2013-08-02 | 2013-12-04 | 中国石油天然气集团公司 | Emulsifier for novel high-temperature water-in-oil drilling fluid |
| CN105642186B (en) * | 2016-01-13 | 2017-12-01 | 中国石油大学(华东) | A kind of reversible emulsifier combination of pH value response and its preparation method and application |
| CN105885815B (en) * | 2016-04-20 | 2018-09-04 | 河南省科学院高新技术研究中心 | A method of preparing Gemini surface active agent |
| CN109985565B (en) * | 2017-12-29 | 2021-07-02 | 中国石油化工股份有限公司 | Mixed system containing fatty acid type surfactant and preparation method thereof |
| CN114045163B (en) * | 2021-11-10 | 2023-04-28 | 捷贝通石油技术集团股份有限公司 | Preparation method of nano permeability-increasing desorbent for shale gas yield increase |
| CN114854389B (en) * | 2022-07-06 | 2022-09-30 | 德仕能源科技集团股份有限公司 | Foaming agent and preparation method and application thereof |
| CN118063356A (en) * | 2024-04-15 | 2024-05-24 | 南京师范大学 | Preparation method of high-purity sodium metasilicate/heptane sulfonate |
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| CN1843605A (en) * | 2006-03-21 | 2006-10-11 | 华东理工大学 | Anionic oligo surfactant and its preparation method |
| CN101450295A (en) * | 2008-12-15 | 2009-06-10 | 南京金杉汽车工程塑料有限责任公司 | Efficient zwitterionic gemini surfactant and synthesis method thereof |
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| CN1843605A (en) * | 2006-03-21 | 2006-10-11 | 华东理工大学 | Anionic oligo surfactant and its preparation method |
| CN101450295A (en) * | 2008-12-15 | 2009-06-10 | 南京金杉汽车工程塑料有限责任公司 | Efficient zwitterionic gemini surfactant and synthesis method thereof |
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Effective date of registration: 20180111 Address after: 163000 Heilongjiang province Daqing City Longfeng District Long Qi Lu door No. 7 Room 201 7 Patentee after: Sun Anshun Address before: 163311, No. three, 82 Village Road, Saertu District, Heilongjiang, Daqing Patentee before: Daqing Hualongxiang Chemical Co., Ltd. |
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Effective date of registration: 20191121 Address after: Room 225, No. 2 Office Building, Xinghua Park, Daqing High-tech Zone, Heilongjiang Province Patentee after: Daqing Hualongxiang Chemical Co., Ltd. Address before: 163000 Heilongjiang province Daqing City Longfeng District Long Qi Lu door No. 7 Room 201 7 Patentee before: Sun Anshun |