CN101298553A - Double-hydrophilic novel surfactant, formula system and use thereof - Google Patents
Double-hydrophilic novel surfactant, formula system and use thereof Download PDFInfo
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- CN101298553A CN101298553A CNA2008101278428A CN200810127842A CN101298553A CN 101298553 A CN101298553 A CN 101298553A CN A2008101278428 A CNA2008101278428 A CN A2008101278428A CN 200810127842 A CN200810127842 A CN 200810127842A CN 101298553 A CN101298553 A CN 101298553A
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Abstract
The invention discloses a novel gemini surfactant with double end hydrophilic groups, a formula system thereof and application thereof. The molecular structure of the surfactant is as the formula. The surfactant forms ultra-low interfacial tension of 10<-3> - 10<-5> mN/m with raw oil under the condition of alkali free or low alkali to achieve the aim of improving recovery efficiency.
Description
Technical field:
The present invention relates to a kind of chemical assistant used in the oil recovery field, oil field, especially a kind of double-hydrophilic novel surfactant, its formula system and application thereof.
Background technology:
The application surface promoting agent recovers the oil to study and all obtained very big development in theory and practice in the oil exploitation technology, at present, has formed following several injection systems basically.(1) active water drive, (2) micellar solution flooding, the displacement of reservoir oil of (3) low interfacial tension system, (4) ternary composite driving.Wherein ternary composite driving (alkali-polymkeric substance-tensio-active agent) is a kind of novel method that improves oil recovery factor that just grows up the 1980s, because this method still can obtain higher oil displacement efficiency under the situation of low surfactant consumption, therefore, it has become the new technology at economic and technical all very successful raising oil recovery factor.
After the oil field enters high water-cut stage, surplus oil with discontinuous oil film by trap in the hole of reservoir rocks, two main power that act on the oil droplet are viscaps.If use suitable surfactant system, reduce the interfacial tension between profit, just reduced the resistance that the oil droplet distortion was brought when irreducible oil was moved, thus oil recovery factor improved.
In the ternary composite oil-displacing system, contain the alkali of high density, as sodium hydroxide, yellow soda ash etc., in use, huge injury has been brought on stratum and oil well etc., pressed for a kind of novel flooding system now, under the situation of alkali-free or low alkali, form 10 with underground crude oil
-3～10
-5The ultra low interfacial tension of mN/m improves oil recovery factor more than 20%.Tensio-active agent of the present invention is to form ultra low interfacial tension and the application of formula system in tertiary oil recovery thereof under alkali-free or low alkali condition.
Summary of the invention:
In order to overcome the deficiency in the background technology, the invention provides a kind of double-hydrophilic novel surfactant, its formula system and application thereof.This table is lived agent under alkali-free or low alkali condition, forms 10 with crude oil
-3～10
-5The ultra low interfacial tension of mN/m reaches the purpose that improves recovery ratio.
The technical scheme of employing of the present invention is: the molecular structural formula of this tensio-active agent is:
Or
Or
Wherein: R is alkyl, alkane phenyl, and carbon chain lengths is C
9～C
24I is 0～8; M is any one in alkali metallic sodium or potassium, Monoethanolamine MEA BASF, diethanolamine, the trolamine.R is any one alkyl in 12～18; I is any one positive integer in 0～3; M be sodium, potassium, Monoethanolamine MEA BASF, diethanolamine, in any one.R is any one alkyl in 16～18; I is any one positive integer in 0～3; M be sodium, diethanolamine, in any one.R is 16; I is 2; M is a sodium.
The oil-displacing agent formula system that above-mentioned tensio-active agent is mixed with comprises following component:
(1) tensio-active agent is 0.01%～0.5% (w);
(2) water-soluble polyacrylamide is 0～0.3% (w), Molecular Weight for Polyacrylamide 300～30,000,000;
(3) sodium hydroxide or yellow soda ash are 0～2.0% (w);
(4) all the other inject clear water or sewage for the oil field.
The above-mentioned application of oil-displacing agent formula system in tertiary oil recovery can be used tensio-active agent separately, can also further add alkali, can also further again addition polymerization compound.
Use in the oil-displacing agent formula system, can add other anion surfactants/new formula system and underground crude oil of nonionogenic tenside composition and can reach 10
-3～10
-5The ultra low interfacial tension of mN/m improves oil recovery factor.
Be used for the application of the oil-displacing agent formula system of tertiary oil recovery, can also be applied to oil well or well immediate vicinity of wellbore and handle de-plugging or step-down augmented injection.
In actual applications, because the difference of oil field block, reservoir condition is inconsistent, the composition difference of crude oil, underground water, clay mineral, therefore at different reservoir conditions, just can select various combination, different ratios to make displacing surfactant system or tensio-active agent---polymkeric substance binary combination flooding oil body system, to reach best oil displacement efficiency.
The present invention has following beneficial effect: surfactant formula system still can form 10 with underground crude oil among (1), the present invention under alkali-free or low alkali condition
-3～10
-5The ultra low interfacial tension of mN/m has not only overcome when using at the scene high concentration alkali to the huge injury of stratum and oil well, and compliance with environmental protection requirements, and equipment is not had injury, can reach best oil displacement efficiency; (2) can use and biorefractory characteristic on the high salinity stratum; (3) can improve oil recovery factor more than 27%, and cost is very low, can brings huge economic benefit for the oil field.
Embodiment:
The invention will be further described below in conjunction with embodiment:
The reagent and the testing tool that use among the following embodiment are as follows:
One, use reagent:
Water-soluble polyacrylamide Daqing oil field auxiliary reagent factory produces (salt-resistant polymer)
Experiment water Daqing oil field recover the oil two factory's clear water, two factory's sewage
Crude oil Daqing oil field dewatered oil.
Two, testing tool:
Interfacial tensimeter, 45 ℃ of experimental temperatures are dripped in the rotation of 500 types.
Synthesizing of embodiment 1,2-sodium sulfonate-sodium stearate:
In the 2000ml there-necked flask that condenser, agitator, constant voltage drop-burette are housed, add methyl stearate 298g, normal hexane 400ml, stir and be warming up to 60 ℃, drip chlorsulfonic acid 130g, dropwise reaction 2 hours.Intensification removes normal hexane.In flask, add sodium hydroxide 100g, water 500g, be warming up to backflow, reacted 3 hours.Be cooled to 50 ℃, add 250g to system and mix alcohol.It in promptly obtaining containing 30% surfactant soln.
Embodiment 2, low highly basic oil-displacing agent system preparation:
Get 2-sodium sulfonate-sodium stearate 0.3g, polyacrylamide (2,500 ten thousand molecular weight) 0.2g, sodium hydroxide 0.2g, water 99.3g stirred 30 minutes, obtained the oil-displacing agent system.
Embodiment 3, the preparation of weak base oil-displacing agent system:
Get 2-sodium sulfonate-sodium stearate 0.3g, polyacrylamide (2,500 ten thousand molecular weight) 0.2g, yellow soda ash 0.8g, water 98.7g stirred 30 minutes, obtained the oil-displacing agent system.
Embodiment 4, the preparation of non-base oil-displacing agent system:
Get 2-sodium sulfonate-sodium stearate 0.3g, polyacrylamide (2,500 ten thousand molecular weight) 0.2g, water 99.5g stirred 30 minutes, obtained the oil-displacing agent system.
Embodiment 5, the flooding system that 2-sodium sulfonate-sodium stearate is mixed with when 0.01～0.3% (w) and the interfacial tension of underground crude oil are 10
-3～10
-5The ultra low interfacial tension of N/m, experiment water is the Daqing oil field two factory's sewage that recover the oil, crude oil is the Daqing oil field dewatered oil.
Embodiment 6, be 1000md in perm-plug method, inject the binary slug in the core earlier, it consists of the composite oil-displacing system 0.38PV (volume of voids) that the foregoing description two to four is mixed with, the follow-up slug 0.1PV polymkeric substance that reinjects, and the recovery ratio that can improve crude oil is more than 27%.
Claims (8)
1, a kind of surfactant oil displacement, the molecular structural formula of this tensio-active agent is:
Wherein: R is alkyl, alkane phenyl, and carbon chain lengths is C
9～C
24I is 0～8; M is any one in alkali metallic sodium or potassium, Monoethanolamine MEA BASF, diethanolamine, the trolamine.
2, the described surfactant oil displacement of claim 1 is characterized in that: R is any one alkyl in 12～18; I is any one positive integer in 0～3; M be sodium, potassium, Monoethanolamine MEA BASF, diethanolamine, in any one.
3, surfactant oil displacement according to claim 2 is characterized in that: R is any one alkyl in 16～18; I is any one positive integer in 0～3; M be sodium, diethanolamine, in any one.
4, surfactant oil displacement according to claim 3 is characterized in that: R is 16; I is 2; M is a sodium.
5, the oil-displacing agent formula system that is mixed with of the described tensio-active agent of one of claim 1～4 comprises following component:
(1) tensio-active agent is 0.01%～0.5% (w);
(2) water-soluble polyacrylamide is 0～0.3% (w), Molecular Weight for Polyacrylamide 300～30,000,000;
(3) sodium hydroxide or yellow soda ash are 0～2.0% (w);
(4) all the other inject clear water or sewage for the oil field.
6, the application of the described oil-displacing agent formula system of claim 5 in tertiary oil recovery can be used tensio-active agent separately, can also further add alkali, can also further again addition polymerization compound.
7, the application of claim 6 in the oil-displacing agent formula system, can add other anion surfactants/new formula system and underground crude oil of nonionogenic tenside composition and can reach 10
-3～10
-5The ultra low interfacial tension of mN/m improves oil recovery factor.
8, be used for the application of the oil-displacing agent formula system of tertiary oil recovery in the claim 1～4, can also be applied to oil well or well immediate vicinity of wellbore and handle de-plugging or step-down augmented injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101278428A CN101298553A (en) | 2008-07-07 | 2008-07-07 | Double-hydrophilic novel surfactant, formula system and use thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101278428A CN101298553A (en) | 2008-07-07 | 2008-07-07 | Double-hydrophilic novel surfactant, formula system and use thereof |
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| CNA2008101278428A Pending CN101298553A (en) | 2008-07-07 | 2008-07-07 | Double-hydrophilic novel surfactant, formula system and use thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030851B (en) * | 2009-09-25 | 2012-07-25 | 中国石油化工股份有限公司 | Modified polyacrylamide and preparation method thereof |
| CN103540306A (en) * | 2012-07-12 | 2014-01-29 | 中国石油化工股份有限公司 | Surfactant composition for tertiary oil recovery and preparation method thereof |
| CN108203580A (en) * | 2016-12-20 | 2018-06-26 | 中国石油化工股份有限公司 | A kind of method using Gemini surface active agent increasing injection |
| CN111925288A (en) * | 2020-08-21 | 2020-11-13 | 中国石油大学(华东) | Oil displacement agent for regulating and controlling interface infiltration and preparation method and application thereof |
| CN115322134A (en) * | 2022-07-29 | 2022-11-11 | 上海宇昂水性新材料科技股份有限公司 | Anionic amphiphilic water-based surfactant and preparation method and application thereof |
-
2008
- 2008-07-07 CN CNA2008101278428A patent/CN101298553A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030851B (en) * | 2009-09-25 | 2012-07-25 | 中国石油化工股份有限公司 | Modified polyacrylamide and preparation method thereof |
| CN103540306A (en) * | 2012-07-12 | 2014-01-29 | 中国石油化工股份有限公司 | Surfactant composition for tertiary oil recovery and preparation method thereof |
| CN103540306B (en) * | 2012-07-12 | 2016-04-13 | 中国石油化工股份有限公司 | Three adopt surfactant composition and preparation method thereof |
| CN108203580A (en) * | 2016-12-20 | 2018-06-26 | 中国石油化工股份有限公司 | A kind of method using Gemini surface active agent increasing injection |
| CN111925288A (en) * | 2020-08-21 | 2020-11-13 | 中国石油大学(华东) | Oil displacement agent for regulating and controlling interface infiltration and preparation method and application thereof |
| CN111925288B (en) * | 2020-08-21 | 2023-03-31 | 中国石油大学(华东) | Oil displacement agent for regulating and controlling interface infiltration and preparation method and application thereof |
| CN115322134A (en) * | 2022-07-29 | 2022-11-11 | 上海宇昂水性新材料科技股份有限公司 | Anionic amphiphilic water-based surfactant and preparation method and application thereof |
| CN115322134B (en) * | 2022-07-29 | 2023-11-03 | 上海宇昂水性新材料科技股份有限公司 | Anionic amphiphilic surfactant and preparation method and application thereof |
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Open date: 20081105 |