CN101942297B - Fatty acid amide potassium phosphate betaine surfactant for tertiary oil recovery, and preparation method and application thereof - Google Patents
Fatty acid amide potassium phosphate betaine surfactant for tertiary oil recovery, and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to a fatty acid amide potassium phosphate betaine surfactant for tertiary oil recovery, and a preparation method and application thereof. The fatty acid amide potassium phosphate betaine surfactant has the structural formula shown in the description, wherein R1 is C13-C23 alkyl, and R2 is C12-C20 alkyl. The fatty acid amide potassium phosphate betaine surfactant prepared by the method is applied to the tertiary oil recovery in an oil field, is used as an oil displacement agent for preparing a binary oil displacement system, and has the advantages of good interfacial tension and oil displacement performance, compatibility with different oil-water conditions and ideal oil displacement effect.
Description
Technical field:
The present invention relates to the used a kind of auxiliary agent in oil extraction in oil field field, especially plant fatty acid amide potassium phosphate betaine surfactant for tertiary oil recovery, preparation method and application thereof.
Background technology:
Tensio-active agent is used for tertiary oil recovery and mainly contains single surfactant flooding, binary combination flooding, ternary composite driving.Wherein ternary composite driving (alkali+polymkeric substance+tensio-active agent) is a kind of method that improves recovery ratio that last century, the eighties grew up, this flooding system can reduce oil water interfacial tension, reduce the resistance that the oil droplet distortion brings when using remaining the movement, thereby improved oil displacement efficiency.Yet, because the alkali (sodium hydroxide) in the ternary composite displacement system has solvency action to the rocks and minerals in the stratum, cause the fouling of joint station treatment system serious, affected the normal operation of crude production.The existence of alkali can cause downhole scaling, even the decline of production fluid amount occurs, and the problems such as recovery well holddown also can cause the oil reservoir clay dispersion, and migration and expansion cause reservoir permeability to descend, and reservoir is damaged, and have a strong impact on field produces.Contain the injury that the alkali compound system causes oil reservoir for alleviating, the general method that adopts reduction alkali consumption or come synergistic surfactant generation ultra low interfacial tension with weak base, but weak base can produce serious injury to the stratum too.
Current in order to strengthen the oil displacement efficiency of tensio-active agent, often adopt the compound system of mixed surfactant to carry out the displacement of reservoir oil.But when this system is passed through pore media, because of the difference of its adsorptive power and in difference oily, that aqueous phase distributes chromatographic separation occurs.
Summary of the invention:
In order to overcome the deficiency in the background technology, the invention provides a kind of fatty acid amide potassium phosphate betaine surfactant and preparation method thereof, fatty acid amide potassium phosphate betaine surfactant by the method preparation is applicable in the tertiary oil production in oil field, as oil-displacing agent preparation binary combination flooding oil systems, have good interfacial tension and Oil Displacing Capacity, can from different profit condition compatibilities, reach desirable oil displacement efficiency.
The technical solution used in the present invention is: this fatty acid amide potassium phosphate betaine surfactant structural formula is:
Wherein: R
1Be C
13～C
23Alkyl; R
2Be C
12～C
20Alkyl.
The preparation method of described fatty acid amide potassium phosphate betaine surfactant comprises the following steps, each raw material by weight ratio:
150～300 parts of straight chain fatty acids are added in the reactor, add 75～90 parts of hydroxyethylethylene diamine after the thawing that heats up and continue to be warming up to 140～160 ℃, reaction is 2～4h, is cooled to room temperature, adds P again
2O
550～55 parts are reacted 2h under 80 ℃ of conditions, add again 200～400 parts of water, 80 ℃ of reaction 1h add 40～50 parts KOH80 ℃ reaction 1h again, add 90～95 ℃ of 150～280 parts of halohydrocarbons reaction temperature, reaction 8～12h again, be cooled to 70 ℃, mix with above-mentioned reaction product with 90～100 parts of sodium chloroacetates of 150～200 parts of water dissolution, temperature of reaction 80-85 ℃, reaction 4 h have namely synthesized the N-alkyl, N-ethyl phosphonic acid ester potassium, alkylamide ethyl acetic acid trimethyl-glycine.
Above-mentioned straight chain fatty acid is one or more in TETRADECONIC ACID, palmitic acid, stearic acid, 20 acid, the tetracosanoic acid.
Above-mentioned halohydrocarbon is one or more in chloro or bromododecane, chloro or tridecane bromide, chloro or bromotetradecane, chloro or bromo pentadecane, chloro or bromohexadecane, chloro or bromo-octadecane, chloro or the bromo eicosane.
Described fatty acid amide potassium phosphate betaine surfactant and polymkeric substance form the application in tertiary oil recovery of binary compound system.
The present invention has following beneficial effect: tensio-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 this tensio-active agent has excellent interfacial tension 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: each raw material is by weight ratio among the following embodiment:
Embodiment 1,
168 parts of TETRADECONIC ACID are added in the reactor, and 77 parts of hydroxyethylethylene diamine of adding continue to be warming up to 140 ℃ after the thawing that heats up, and react to be 4h.Be cooled to room temperature, add P
2O
552 parts 80 ℃ reaction 2h; Add 260 parts of water, 80 ℃ of reaction 1h add 80 ℃ of reactions of 42 parts of KOH 1h; Add 90～95 ℃ of 190 parts of chlorooctadecane temperature of reaction, reaction 12h; Be cooled to 70 ℃; Mix with above-mentioned reaction product with 94 parts of sodium chloroacetates of 180 parts of water dissolution, 80～85 ℃ of temperature of reaction, reaction 4 h have namely synthesized the N-octadecyl, N-ethyl phosphonic acid ester potassium, myristamide ethyl acetic acid trimethyl-glycine.
Embodiment 2,
210 parts of palmitic acids are added in the reactor, and 83 parts of hydroxyethylethylene diamine of adding continue to be warming up to 150 ℃ after the thawing that heats up, and react to be 3h.Be cooled to room temperature, add P
2O
552 parts 80 ℃ reaction 2h; Add 300 parts of water, 80 ℃ of reaction 1h add 80 ℃ of reactions of 42 parts of KOH 1h; Add 90～95 ℃ of 210 parts of bromo pentadecane halohydrocarbons reaction temperature, reaction 10h; Be cooled to 70 ℃; Mix with above-mentioned reaction product with 95 parts of sodium chloroacetates of 200 parts of water dissolution, 80～85 ℃ of temperature of reaction, reaction 4 h have namely synthesized the N-pentadecyl, N-ethyl phosphonic acid ester potassium, palmitamide ethyl acetic acid trimethyl-glycine.
Embodiment 3,
259 parts of stearic acids are added in the reactor, and 86 parts of hydroxyethylethylene diamine of adding continue to be warming up to 160 ℃ after the thawing that heats up, and react to be 4h.Be cooled to room temperature, add P
2O
554 parts 80 ℃ reaction 2h; Add 350 parts of water, 80 ℃ of reaction 1h add 80 ℃ of reactions of 45 parts of KOH 1h; Add 90～95 ℃ of 262 parts of chlorooctadecane temperature of reaction, reaction 12h; Be cooled to 70 ℃; Mix with above-mentioned reaction product with 98 parts of sodium chloroacetates of 200 parts of water dissolution, 80～85 ℃ of temperature of reaction, reaction 4 h have namely synthesized the N-octadecyl, N-ethyl phosphonic acid ester potassium, stearylamide ethyl acetic acid trimethyl-glycine.
Embodiment 4,
300 parts of tetracosanoic acid are added in the reactor, and 90 parts of hydroxyethylethylene diamine of adding continue to be warming up to 160 ℃ after the thawing that heats up, and react to be 4h.Be cooled to room temperature, add P
2O
555 parts 80 ℃ reaction 2h; Add 400 parts of water, 80 ℃ of reaction 1h add 80 ℃ of reactions of 50 parts of KOH 1h; Add 90～95 ℃ of 150 parts of bromododecane temperature of reaction, reaction 8h; Be cooled to 70 ℃; Mix with above-mentioned reaction product with 96 parts of sodium chloroacetates of 170 parts of water dissolution, 80～85 ℃ of temperature of reaction, reaction 4 h have namely synthesized the N-dodecyl, N-ethyl phosphonic acid ester potassium, two myristamide ethyl acetic acid trimethyl-glycines.
Embodiment 5,
The tensio-active agent of present method preparation is applied to the binary combination flooding experiment: be re-dubbed binary combination flooding by above-mentioned synthetic surfactant samples 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 grand celebration two factory's deeply treating wastewater and the dewatered oils that recover the oil.It is 1200mg/L that superelevation is divided polymer concentration.Tensio-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 6,
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 the Daqing oil field two factory's dewatered oils that recover the oil with oil, drive water and be the Daqing oil field two factory's deeply treating wastewaters that recover the oil, the binary system polymer concentration is the polymers soln of 1200ppm, it is 0.3% that adding embodiment 1 synthetic tensio-active agent makes 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. fatty acid amide potassium phosphate betaine surfactant, this surfactant structure formula is:
Wherein: R
1Be C
13～C
23Alkyl; R
2Be C
12～C
20Alkyl.
2. the preparation method of fatty acid amide potassium phosphate betaine surfactant claimed in claim 1, the method comprise the following steps, each raw material by weight ratio:
150～300 parts of straight chain fatty acids are added in the reactor, add 75～90 parts of hydroxyethylethylene diamine after the thawing that heats up and continue to be warming up to 140～160 ℃, reaction is 2～4h, is cooled to room temperature, adds P again
2O
550～55 parts are reacted 2h under 80 ℃ of conditions, add again 200～400 parts of water, 80 ℃ of reaction 1h, add again 40～50 parts KOH80 ℃ reaction 1h, add again 90～95 ℃ of 150～280 parts of halohydrocarbons reaction temperature, reaction 8～12h, be cooled to 70 ℃, mix with above-mentioned reaction product with 90～100 parts of sodium chloroacetates of 150～200 parts of water dissolution, temperature of reaction 80-85 ℃, reaction 4 h have namely synthesized fatty acid amide potassium phosphate betaine surfactant.
3. the preparation method of fatty acid amide potassium phosphate betaine surfactant according to claim 2, it is characterized in that: described straight chain fatty acid is one or more in TETRADECONIC ACID, palmitic acid, stearic acid, 20 acid, the tetracosanoic acid.
4. the preparation method of fatty acid amide potassium phosphate betaine surfactant according to claim 3, it is characterized in that: described halohydrocarbon is one or more in chloro or bromododecane, chloro or tridecane bromide, chloro or bromotetradecane, chloro or bromo pentadecane, chloro or bromohexadecane, chloro or bromo-octadecane, chloro or the bromo eicosane.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171282A (en) * | 1977-12-07 | 1979-10-16 | Ciba-Geigy Corporation | Fluorinated nonionic surfactants |
| CN1745157A (en) * | 2002-12-02 | 2006-03-08 | 马奎斯流体股份有限公司 | Emulsified polymer drilling fluid and methods of preparation and use thereof |
| CN101665685A (en) * | 2009-09-14 | 2010-03-10 | 天津师范大学 | Oil-displacing agent for enhancing crude oil recovery efficiency in tertiary recovery |
-
2010
- 2010-09-21 CN CN 201010288343 patent/CN101942297B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171282A (en) * | 1977-12-07 | 1979-10-16 | Ciba-Geigy Corporation | Fluorinated nonionic surfactants |
| CN1745157A (en) * | 2002-12-02 | 2006-03-08 | 马奎斯流体股份有限公司 | Emulsified polymer drilling fluid and methods of preparation and use thereof |
| CN101665685A (en) * | 2009-09-14 | 2010-03-10 | 天津师范大学 | Oil-displacing agent for enhancing crude oil recovery efficiency in tertiary recovery |
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