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CN119059944A - A multifunctional surfactant for reducing pressure and increasing injection and its preparation method - Google Patents

A multifunctional surfactant for reducing pressure and increasing injection and its preparation method Download PDF

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Publication number
CN119059944A
CN119059944A CN202411185181.XA CN202411185181A CN119059944A CN 119059944 A CN119059944 A CN 119059944A CN 202411185181 A CN202411185181 A CN 202411185181A CN 119059944 A CN119059944 A CN 119059944A
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reducing pressure
increasing injection
surfactant
multifunctional
multifunctional surfactant
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王晨
李昕
侯妍
杨晓武
代方方
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Shaanxi University of Science and Technology
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Shaanxi University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
    • C07C303/32—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01—Sulfonic acids
    • C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
    • C07C309/03—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
    • C07C309/13—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
    • C07C309/14—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton containing amino groups bound to the carbon skeleton
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    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
    • C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
    • C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • 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
    • C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants

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  • General Life Sciences & Earth Sciences (AREA)
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Abstract

The invention discloses a multifunctional surfactant for reducing pressure and increasing injection and a preparation method thereof, belonging to the field of petrochemical industry. The preparation method comprises the steps of uniformly mixing 3-chlorine-2-hydroxy sodium propane sulfonate, polyamine, sodium hydroxide solution and distilled water, adjusting the pH value to 5-6, stirring and reacting, cooling to room temperature, evaporating solvent, washing, drying in vacuum to obtain a first intermediate, uniformly mixing long-chain halogenated alkane, N-dimethylformamide and the first intermediate, adding sodium bicarbonate in the reaction process, adjusting the pH value to 7-10, stirring and reacting, removing the solvent by reduced pressure distillation, washing, and drying in vacuum to obtain the multifunctional surfactant for reducing pressure and increasing injection. The molecular chain contains sulfonic acid group, hydroxyl group, tertiary amine, primary amine and other functional groups, so that the advantages of strong synergistic effect of the multifunctional groups and strong hydrophilia of the sulfonic acid groups and strong calcium carbonate and calcium phosphate scale resistance are fully exerted, and corrosion inhibition and scale resistance are obviously improved, so that the characteristics of reducing pressure and increasing injection are achieved.

Description

Multifunctional surfactant for reducing blood pressure and increasing injection and preparation method thereof
Technical Field
The invention belongs to the field of petrochemical industry, and particularly relates to a multifunctional surfactant for reducing pressure and increasing injection and a preparation method thereof.
Background
Water injection development is the most common technical means for supplementing stratum energy for low-permeability reservoirs, but the problems that the difference of matrix pore throat characteristics is large, the clay mineral content is high, the capillary tube is strong, the water locking effect is high, the water injection starting pressure is high, the injection allocation requirement cannot be met and the like are commonly existed in the development process. In addition, the injection water generally adopts oilfield produced water, which generally contains a certain amount of oil substances and other mechanical impurities, is extremely easy to cause formation blockage damage in the long-term water injection development process, causes the injection pressure of an injection distillation well to be increased and the injection quantity to be reduced, cannot meet the requirement of low-permeability oilfield water injection on improving the recovery ratio, and seriously influences the normal development and production process of the oilfield. Therefore, research on efficient pressure-reducing and injection-increasing measures of the injection-distillation water well is a key for improving the development efficiency of the low-permeability oil reservoir.
At present, the pressure reduction and injection increase measures of the water injection well of the ultralow permeability oil reservoir generally adopt the technologies of acid fracturing, separated layer water injection, nano materials, surfactants and the like. The acidizing and fracturing technology has the advantages of narrow application range, short action period, small treatment radius, high price of nano materials, complex preparation process and suitability for the oil-water well with good communication condition. Surfactants are one of the most common modes of depressurization and injection enhancement, and improve the seepage capability of injected water by reducing interfacial tension between oil and water in a reservoir. However, with continuous exploitation of petroleum resources, physical properties of reservoirs of the oil deposit are increasingly deteriorated, and conventional surfactants are difficult to meet the requirements.
Aiming at the problems that the injected water in the low-permeability oil reservoir water injection development process contains impurities which are easy to cause formation blockage damage, the water injection starting pressure is high, the existing compound depressurization and injection increasing agent needs on-site liquid preparation and the construction is complicated. Therefore, the development of a multifunctional surfactant has important significance for improving the recovery ratio of a low-permeability reservoir.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a multifunctional surfactant for reducing blood pressure and increasing injection and a preparation method thereof, so as to solve the technical problems that the existing compound blood pressure reducing and increasing injection needs on-site liquid preparation and construction is complicated.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
The invention discloses a preparation method of a multifunctional surfactant for reducing blood pressure and increasing injection, which comprises the following steps:
S1, uniformly mixing 3-chlorine-2-hydroxy sodium propane sulfonate, polyamine, sodium hydroxide solution and distilled water, regulating the pH value to 5-6, stirring for reaction, cooling to room temperature, evaporating solvent, washing, and vacuum drying to obtain a first intermediate;
And S2, uniformly mixing long-chain halogenated alkane, N-dimethylformamide and the first intermediate obtained in the step S1, adding sodium bicarbonate in the reaction process, adjusting the pH value to 7-10, stirring for reaction, distilling under reduced pressure to remove the solvent, washing, and drying in vacuum to obtain the multifunctional surfactant for reducing pressure and increasing injection.
In the step S1, the mass ratio of the 3-chloro-2-hydroxy sodium sulfonate, the polyamine and the sodium hydroxide solution is 1 (0.15-0.3) (1.2-1.5), the sodium hydroxide solution is 50% of the sodium hydroxide solution by mass percent, and the addition amount of distilled water is 2-3 times of the total mass of the 3-chloro-2-hydroxy sodium sulfonate, the polyamine and the 50% sodium hydroxide solution.
Preferably, in step S1, the polyamine is one of ethylenediamine and 1,3 propylenediamine.
Preferably, in the step S1, the stirring reaction condition is that the stirring reaction is carried out in a water bath at 50-70 ℃ for 4-6 hours.
Preferably, in step S1, the washing conditions are such that the washing is performed 5 to 8 times with anhydrous methanol.
In the step S2, the mass ratio of the first intermediate to the long-chain halogenated hydrocarbon to the sodium bicarbonate is 1 (1.3-1.5) (1.4-1.6), and the addition amount of the N, N-dimethylformamide is 3-5 times of the total mass of the long-chain halogenated hydrocarbon, the first intermediate and the sodium bicarbonate.
Preferably, in the step S2, the stirring reaction condition is that the magnetic stirring reaction is carried out for 5-8 hours at 20-50 ℃.
Preferably, in step S2, the washing conditions are such that the washing is performed 2 to 3 times with distilled water-free ethanol.
Preferably, in step S2, the long-chain haloalkyl is one of bromododecane, bromotetradecane, bromohexadecane, iodododecane, iodotetradecane and iodohexadecane.
The invention also discloses the multifunctional surfactant for reducing blood pressure and increasing injection prepared by the preparation method.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides a preparation method of a multifunctional surfactant for reducing pressure and increasing injection, which comprises the steps of carrying out substitution reaction on 3-chlorine-2-hydroxy propane sodium sulfonate and polyamine, and carrying out alkylation reaction on the compound and long-chain halogenated alkane to obtain the multifunctional surfactant for reducing pressure and increasing injection. The 3-chlorine-2-hydroxy sodium propane sulfonate, the polyamine, the sodium hydroxide solution and the distilled water are uniformly mixed, and the 3-chlorine-2-hydroxy sodium propane sulfonate and the polyamine are easier to undergo substitution reaction under alkaline conditions, so that the reactant is more reactive because the alkaline environment is conducive to deprotonation. And the pH value is regulated to 5-6, and active groups (such as amino and chlorine) of reactants have proper charge states in the pH value range, so that the interaction between the active groups is more beneficial, and the efficiency and the selectivity of the substitution reaction are improved. The stirring reaction is carried out, the reaction is cooled to the room temperature, the stirring reaction promotes the full contact and collision of reactants, and the reaction opportunity is increased. Cooling to room temperature is favorable for smooth reaction, and side reaction or product decomposition caused by excessive temperature is prevented. Evaporating the solvent, washing, and vacuum drying to obtain a first intermediate, wherein the evaporating solvent can remove volatile components in unreacted raw materials and byproducts, washing can further remove residual impurities, and vacuum drying ensures the drying and purity of the final product. These steps work together to give a first intermediate of higher purity and better reactivity. The long-chain halogenated alkane, the N, N-dimethylformamide and the first intermediate are uniformly mixed, so that the uniform mixing of raw materials required by alkylation reaction is realized. Long-chain alkyl halide is used as an alkylating reagent to react with active groups in the first intermediate to introduce long-chain alkyl. N, N-dimethylformamide is used as a solvent, which is favorable for dissolving and dispersing reactants and improves the reaction efficiency. In the reaction process, sodium bicarbonate is added, the pH value is regulated to 7-10, the sodium bicarbonate is added, and the pH value is regulated to a proper range, so that the condition of alkylation reaction is optimized, and in the pH range, active groups (such as hydroxyl or amino) in the first intermediate have proper charge states, so that the alkylation reaction with long-chain halogenated alkane is easier to occur. Meanwhile, sodium bicarbonate can also be used as a buffering agent to stabilize the pH value of the reaction system and prevent side reactions caused by pH change. The solvent is removed by reduced pressure distillation through stirring reaction, and the stirring reaction promotes the alkylation reaction to be more complete. The reduced pressure distillation effectively removes the solvent and unreacted raw materials, reduces the impurity content of the product and improves the purity of the product. Washing and vacuum drying to obtain the multifunctional surfactant for reducing pressure and increasing injection, wherein residual impurities and unreacted raw materials can be further removed by washing, and the purity of the final product is ensured. The vacuum drying removes the moisture and volatile impurities in the product, and improves the stability and storage property of the product. The finally obtained multifunctional surfactant for reducing and increasing the pressure has excellent performance and purity, and can meet the application requirements of reducing and increasing the pressure. The molecular chain of the multifunctional surfactant for reducing pressure and increasing injection contains more functional groups such as sulfonic acid groups, hydroxyl groups, tertiary amine, primary amine and the like, fully plays the synergistic effect of the multifunctional groups and the advantages of strong hydrophilicity of the sulfonic acid groups and strong calcium carbonate and calcium phosphate scale resistance, and obviously improves the corrosion and scale inhibition performance so as to achieve the characteristics of reducing pressure and increasing injection. In addition, the surfactant prepared by the invention solves the problems that the existing compound pressure-reducing injection-increasing agent needs to be prepared in situ, construction is complicated and the like, and has wide development prospect. The water-filling agent can emulsify organic macromolecules in the plug, improve the solubility or dispersibility of the water-filling agent in water, chelate calcium and magnesium ions in scale, realize the descaling effect, has the wetting effect, can reduce the contact angle of liquid on the solid surface, promote the uniform distribution of the liquid on the solid surface, effectively reduce the interfacial tension of oil and water, remove the oil-containing plug and achieve the aim of reducing the water injection pressure. the functions are jointly acted on the pressure reduction and injection increase process, so that the development efficiency of the low-permeability oil reservoir is improved.
The invention also discloses the multifunctional surfactant for reducing blood pressure and increasing injection prepared by the preparation method, and the multifunctional surfactant for reducing blood pressure and increasing injection has multiple effects. The surfactant has the advantages that (1) long-chain alkyl groups can interact with organic macromolecules in the scale to form a tiny emulsion structure, so that organic macromolecules which are difficult to disperse or dissolve originally can be uniformly distributed in water, the solubility or dispersibility of the organic macromolecules in the water is improved, (2) calcium magnesium ions in the chelated scale, amino groups and sulfonic acid groups can form complexes or coordination compounds with metal ions, the complexation can change the activity of Ca 2+、Mg2+ ions so as to prevent the Ca 2+、Mg2+ ions from participating in scale formation and further realize the scale removal effect, and (3) the wetting effect is realized, wherein the surfactant has more hydrophilic groups such as sulfonic acid groups, hydroxyl groups, tertiary amines, primary amines and the like, so that liquid molecules can interact with solid surface molecules more tightly, the contact angle of the liquid on the solid surface is reduced, and the uniform distribution of the liquid on the solid surface is promoted. Meanwhile, the interfacial tension of oil and water is reduced by adsorbing the surfactant, oil drops can more easily pass through the pore throat, and the oil-containing blockage can be effectively removed, so that the aim of reducing the water injection pressure is fulfilled.
Drawings
FIG. 1 is a diagram of a mechanism of synthesizing a multifunctional surfactant for reducing pressure and increasing injection;
FIG. 2 is a graph showing interfacial tension of the multifunctional surfactant for lowering blood pressure and increasing injection prepared in example 2 according to the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
So that those skilled in the art can appreciate the features and effects of the present invention, a general description and definition of the terms and expressions set forth in the specification and claims follows. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in the event of a conflict, the present specification shall control.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The theory or mechanism described and disclosed herein, whether right or wrong, is not meant to limit the scope of the invention in any way, i.e., the present disclosure may be practiced without limitation to any particular theory or mechanism.
All features such as values, amounts, and concentrations that are defined herein in the numerical or percent ranges are for brevity and convenience only. Accordingly, the description of a numerical range or percentage range should be considered to cover and specifically disclose all possible sub-ranges and individual values (including integers and fractions) within the range.
Herein, unless otherwise indicated, "comprising," "including," "having," or similar terms encompass the meanings of "consisting of," and "consisting essentially of," such as "a includes a" encompassing "a and other" and "a includes only a".
In this context, not all possible combinations of the individual technical features in the individual embodiments or examples are described in order to simplify the description. Accordingly, as long as there is no contradiction between the combinations of these technical features, any combination of the technical features in the respective embodiments or examples is possible, and all possible combinations should be considered as being within the scope of the present specification.
The application will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
The following examples use instrumentation conventional in the art. The experimental methods, in which specific conditions are not noted in the following examples, are generally conducted under conventional conditions or under conditions recommended by the manufacturer. The following examples used various starting materials, unless otherwise indicated, were conventional commercial products, the specifications of which are conventional in the art. In the description of the present invention and the following examples, "%" means weight percent, and "parts" means parts by weight, and ratios means weight ratio, unless otherwise specified.
The invention is described in further detail below with reference to the attached drawing figures:
the invention provides a preparation method of a multifunctional surfactant for reducing blood pressure and increasing injection, which comprises the following steps:
s1, adding 3-chlorine-2-hydroxy sodium propane sulfonate, polyamine, 50% sodium hydroxide solution and distilled water into a dry three-neck flask, stirring and reacting for 4-6 hours in a water bath at 50-70 ℃, adjusting the pH value of the system to 5-6, cooling to room temperature, washing for 5-8 times by evaporating solvent and absolute methanol, and vacuum drying to obtain a first intermediate;
And S2, uniformly mixing the first intermediate, long-chain halogenated alkane and N, N-dimethylformamide in a three-neck flask, adding sodium bicarbonate in the reaction process to adjust the pH value to 7-10, magnetically stirring and reacting for 5-8 hours at 20-50 ℃, distilling under reduced pressure to remove the solvent, washing with distilled water-free ethanol for 2-3 times, and vacuum drying to obtain the multifunctional surfactant for reducing pressure and increasing injection.
In the invention, in the step S1, the mass ratio of the 3-chlorine-2-hydroxy sodium propane sulfonate, the polyamine and the 50% sodium hydroxide solution is 1 (0.15-0.3) (1.2-1.5). The addition amount of distilled water is 2-3 times of the total mass of 3-chlorine-2-hydroxy propane sodium sulfonate, polyamine and 50% sodium hydroxide solution. The polyamine is one of ethylenediamine and 1, 3-propylenediamine.
In the invention, in the step S2, the mass ratio of the first intermediate to the long-chain halogenated hydrocarbon to the sodium bicarbonate is 1 (1.3-1.5) (1.4-1.6), and the addition amount of the N, N-dimethylformamide is 3-5 times of the total mass of the long-chain halogenated hydrocarbon, the first intermediate and the sodium bicarbonate. The long-chain halogenated alkane is one of bromododecane, bromotetradecane, bromohexadecane, iodododecane, iodotetradecane and iodohexadecane.
The invention also discloses the multifunctional surfactant for reducing and increasing the pressure and the injection prepared by the preparation method, and the multifunctional surfactant for reducing and increasing the pressure and the injection prepared by the specific preparation method has multiple-effect remarkable functions. The long-chain alkyl of the surfactant can interact with organic macromolecules in the scale to form a micro emulsion structure. This feature allows for even distribution of organic macromolecules in water that would otherwise be difficult to disperse or dissolve, significantly improving their solubility or dispersibility in water and helping to clear the plugs. The amino and sulfonic acid groups in the surfactant have the ability to form complexes or coordination compounds with metal ions. The complexing effect can effectively change the active state of Ca 2+、Mg2+ plasma, thereby preventing the Ca 2+、Mg2+ plasma from participating in the formation process of scale, further realizing the descaling effect and keeping the water injection system clean. The surfactant is rich in hydrophilic groups such as sulfonic acid groups, hydroxyl groups, tertiary amines, primary amines and the like, and the groups enable liquid molecules to interact with solid surface molecules more tightly. This action reduces the contact angle of the liquid on the solid surface, promoting a uniform distribution of the liquid on the solid surface. Meanwhile, by adsorbing the surfactant, the interfacial tension of oil and water is reduced, and oil drops can more easily pass through the pore throats, so that the problem of oil-containing blockage is effectively solved, and the aim of reducing water injection pressure is fulfilled. The multifunctional surfactant for reducing pressure and increasing injection has obvious effects on emulsifying plugs, chelating calcium and magnesium ions and wetting action through the unique chemical structure and the unique property, and provides powerful support for the efficient development of low-permeability reservoirs.
The invention is further illustrated by the following examples:
Example 1
The preparation method of the multifunctional surfactant for reducing blood pressure and increasing injection comprises the following steps:
S1, adding 15.5g of 3-chloro-2-hydroxy propane sodium sulfonate, 2.89g of ethylenediamine, 18.6g of 50% sodium hydroxide solution and 74g of distilled water into a dry three-neck flask, stirring and reacting for 6 hours in a distilled water bath at 50 ℃, regulating the pH value of the system to 5, cooling to room temperature, evaporating the solvent, washing for 5 times by using distilled water-free methanol, and vacuum drying to obtain a first intermediate;
S2, uniformly mixing 3.1g of the first intermediate, 4.03g of iodohexadecane and 57.35g of N, N-dimethylformamide in a three-neck flask, adding 4.34g of sodium bicarbonate in the reaction process to adjust the pH value to 7, magnetically stirring at 20 ℃ for reaction for 8 hours, distilling under reduced pressure to remove the solvent, washing with distilled water-free ethanol for 2 times, and vacuum drying to obtain the multifunctional surfactant for reducing pressure and increasing injection.
Example 2
The preparation method of the multifunctional surfactant for reducing blood pressure and increasing injection comprises the following steps:
S1, adding 15g of 3-chloro-2-hydroxy propane sodium sulfonate, 2.61g of ethylenediamine, 22.5g of 50% sodium hydroxide solution and 120g of distilled water into a dry three-neck flask, stirring and reacting for 5.5h in a water bath at 55 ℃, adjusting the pH value of the system to 6, cooling to room temperature, washing for 6 times by evaporating solvent and absolute methanol, and vacuum drying to obtain a first intermediate;
And S2, uniformly mixing 7.8g of the first intermediate, 11.7g of bromododecane and 126g of N, N-dimethylformamide in a three-neck flask, adding 12g of sodium bicarbonate in the reaction process to adjust the pH value to 8, magnetically stirring the mixture at 25 ℃ for reaction for 7.5 hours, distilling the mixture under reduced pressure to remove the solvent, washing the mixture with absolute ethyl alcohol for 3 times, and drying the mixture in vacuum to obtain the multifunctional surfactant for reducing pressure and increasing injection.
Referring to fig. 1, a diagram of a synthesis mechanism of the multifunctional surfactant for reducing pressure and increasing injection is shown, and it can be seen from the diagram that sodium 3-chloro-2-hydroxy propane sulfonate reacts with ethylenediamine to generate a first intermediate, and then the first intermediate reacts with bromododecane to generate the multifunctional surfactant. The surfactant has multiple functions of emulsification, chelation, wetting and the like, and is suitable for applications such as pressure reduction, injection increase and the like.
Fig. 2 is a graph showing the change of interfacial tension with concentration of the multifunctional surfactant for depressurization and injection enhancement, which is prepared in the embodiment 2 of the present invention, and it can be seen from the graph that when the concentration is 0.6%, the interfacial tension can reach 3.89×10 -2 mN/m, which shows that the surfactant can reduce the interfacial tension of oil and water, thereby reducing the seepage resistance of crude oil, and meanwhile, the deformation capability of oil drops is enhanced, and the dispersibility of crude oil in water is improved, so that the originally dispersed oil drops are displaced and flow out along with distilled water.
Example 3
The preparation method of the multifunctional surfactant for reducing blood pressure and increasing injection comprises the following steps:
13g of 3-chloro-2-hydroxy propane sodium sulfonate, 3.9g of ethylenediamine, 16.9g of 50% sodium hydroxide solution and 75g of distilled water are added into a dry three-neck flask, stirred and reacted for 5 hours in a distilled water bath at 60 ℃, the pH value of the system is regulated to 6, then cooled to room temperature, and the first intermediate is obtained by evaporating the solvent, washing 7 times with distilled water-free methanol and vacuum drying;
S2, uniformly mixing 6.3g of the first intermediate, 9.45g of iodotetradecane and 128g of N, N-dimethylformamide in a three-neck flask, adding 10g of sodium bicarbonate in the reaction process to adjust the pH value to 9, magnetically stirring and reacting for 7 hours at 30 ℃, distilling under reduced pressure to remove the solvent, washing with distilled water-free ethanol for 3 times, and vacuum drying to obtain the multifunctional surfactant for reducing pressure and increasing injection.
Example 4
The preparation method of the multifunctional surfactant for reducing blood pressure and increasing injection comprises the following steps:
S1, adding 17.2g of 3-chloro-2-hydroxy propane sodium sulfonate, 2.58g of 1, 3-propane diamine, 24.08g of 50% sodium hydroxide solution and 100g of distilled water into a dry three-neck flask, stirring and reacting for 4.5h in a 65 ℃ distilled water bath, adjusting the pH value of the system to 5, cooling to room temperature, washing for 8 times by evaporating solvent and methanol without distilled water, and vacuum drying to obtain a first intermediate;
s2, uniformly mixing 3.8g of the first intermediate, 5.1g of bromotetradecane and 58g of N, N-dimethylformamide in a three-neck flask, adding 5.7g of sodium bicarbonate in the reaction process to adjust the pH value to 10, magnetically stirring the mixture at 35 ℃ for reaction for 6.5 hours, distilling the mixture under reduced pressure to remove the solvent, washing the mixture with distilled water-free ethanol for 2 times, and vacuum drying the mixture to obtain the multifunctional surfactant for reducing pressure and increasing injection.
Example 5
The preparation method of the multifunctional surfactant for reducing blood pressure and increasing injection comprises the following steps:
S1, adding 14.6g of 3-chloro-2-hydroxy propane sodium sulfonate, 4.2g of 1, 3-propane diamine, 19.3g of 50% sodium hydroxide solution and 88g of distilled water into a dry three-neck flask, stirring and reacting for 4 hours in a 70 ℃ distilled water bath, regulating the pH value of the system to 5, cooling to room temperature, evaporating the solvent, washing for 5 times by using distilled water-free methanol, and vacuum drying to obtain a first intermediate;
S2, uniformly mixing 5g of the first intermediate, 7g of iodododecane and 60g of N, N-dimethylformamide in a three-neck flask, adding 8g of sodium bicarbonate in the reaction process to adjust the pH value to 7, magnetically stirring at 40 ℃ for reaction for 6 hours, distilling under reduced pressure to remove the solvent, washing with distilled water-free ethanol for 2 times, and vacuum drying to obtain the multifunctional surfactant for reducing pressure and increasing injection.
Example 6
The preparation method of the multifunctional surfactant for reducing blood pressure and increasing injection comprises the following steps:
S1, adding 18.2g of 3-chloro-2-hydroxy propane sodium sulfonate, 4.9g of 1, 3-propane diamine, 22.4g of 50% sodium hydroxide solution and 96g of distilled water into a dry three-neck flask, stirring and reacting for 6 hours in a distilled water bath at 60 ℃, regulating the pH value of the system to 6, cooling to room temperature, evaporating the solvent, washing for 5 times by using distilled water-free methanol, and vacuum drying to obtain a first intermediate;
S2, uniformly mixing 4.2g of the first intermediate, 6.3g of bromohexadecane and 80g of N, N-dimethylformamide in a three-neck flask, adding 6.2g of sodium bicarbonate in the reaction process to adjust the pH value to 10, magnetically stirring and reacting for 5 hours at 50 ℃, distilling under reduced pressure to remove the solvent, washing 3 times by using distilled water-free ethanol, and vacuum drying to obtain the multifunctional surfactant for reducing pressure and increasing injection.
Characterization of Performance
To evaluate the performance of the surfactant in terms of lowering pressure and increasing injection, the interfacial tension was measured using a TX-500 rotary interfacial tensiometer, and fig. 2 is a graph showing the change of interfacial tension value with concentration of the multifunctional surfactant for lowering pressure and increasing injection prepared in example 2. As can be seen from fig. 2, when the concentration is 0.6%, the interfacial tension can reach 3.89×10 -2 mN/m, which indicates that the surfactant can reduce the oil-water interfacial tension, thereby reducing the seepage resistance of crude oil, enhancing the deformability of oil drops, improving the dispersibility of crude oil in water, and enabling the originally dispersed oil drops to be displaced and flow out along with distilled water.
Table 1 shows the depressurization rate, i.e., the pressure after the core is injected, of the multifunctional surfactant for depressurization and injection increase prepared in example 2 as a function of the injection amount. By adopting the natural rock core with similar permeability to perform distilled water flooding, then perform surfactant flooding and finally perform distilled water flooding, as can be seen from table 1, along with the continuous increase of the injection PV number of the surfactant, the pressure reduction rate gradually increases, and when the injection PV number of the surfactant is 0.7, the pressure reduction rate can reach more than 30% during rock core displacement, which indicates that the pressure reduction and injection increase effects are better.
TABLE 1 depressurization rate of multifunctional surfactant for depressurization and injection enhancement prepared in EXAMPLE 2
The multifunctional surfactant for reducing pressure and increasing injection has multiple functions, has more functional groups such as sulfonic acid groups, hydroxyl groups, tertiary amine, primary amine and the like on the molecular chain, fully plays the synergistic effect of the multifunctional groups and the advantages of strong hydrophilicity of the sulfonic acid groups and strong calcium carbonate and calcium phosphate scale resistance, and obviously improves the corrosion and scale inhibition performance so as to achieve the characteristics of reducing pressure and increasing injection. In addition, the surfactant prepared by the invention solves the problems that the existing compound pressure-reducing injection-increasing agent needs to be prepared in situ, construction is complicated and the like, and has wide development prospect.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1.一种用于降压增注的多功能表面活性剂的制备方法，其特征在于，包括以下步骤：1. A method for preparing a multifunctional surfactant for reducing pressure and increasing injection, characterized in that it comprises the following steps: S1：将3-氯-2-羟基丙磺酸钠、多胺、氢氧化钠溶液和蒸馏水混合均匀，调节pH值至5～6，经搅拌反应，冷却至室温，蒸发溶剂，洗涤，真空干燥后，得到第一中间体；S1: Mix sodium 3-chloro-2-hydroxypropanesulfonate, polyamine, sodium hydroxide solution and distilled water, adjust the pH value to 5-6, react by stirring, cool to room temperature, evaporate the solvent, wash, and vacuum dry to obtain a first intermediate; S2：将长链卤代烷烃、N,N-二甲基甲酰胺和步骤S1得到的第一中间体混合均匀，反应过程中加入碳酸氢钠，调节pH值至7～10，经搅拌反应，减压蒸馏除去溶剂，洗涤，真空干燥，得到用于降压增注的多功能表面活性剂。S2: uniformly mix the long-chain halogenated alkane, N,N-dimethylformamide and the first intermediate obtained in step S1, add sodium bicarbonate during the reaction, adjust the pH value to 7-10, react by stirring, remove the solvent by reduced pressure distillation, wash, and vacuum dry to obtain a multifunctional surfactant for pressure reduction and injection increase. 2.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S1中，所述3-氯-2-羟基丙磺酸钠、多胺和氢氧化钠溶液的质量比为1：(0.15～0.3)：(1.2～1.5)；所述氢氧化钠溶液为质量百分数为50％的氢氧化钠溶液；所述蒸馏水的添加量为3-氯-2-羟基丙磺酸钠、多胺和50％的氢氧化钠溶液总质量的2～3倍。2. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1 is characterized in that, in step S1, the mass ratio of the sodium 3-chloro-2-hydroxypropane sulfonate, polyamine and sodium hydroxide solution is 1: (0.15-0.3): (1.2-1.5); the sodium hydroxide solution is a sodium hydroxide solution with a mass percentage of 50%; the amount of distilled water added is 2-3 times the total mass of the sodium 3-chloro-2-hydroxypropane sulfonate, polyamine and 50% sodium hydroxide solution. 3.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S1中，所述多胺为乙二胺和1,3丙二胺中的一种。3. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1, characterized in that in step S1, the polyamine is one of ethylenediamine and 1,3-propylenediamine. 4.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S1中，所述搅拌反应的条件为：在50～70℃水浴中搅拌反应4～6h。4. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1 is characterized in that in step S1, the stirring reaction conditions are: stirring the reaction in a water bath at 50-70°C for 4-6 hours. 5.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S1中，所述洗涤的条件为：用无水甲醇洗涤5-8次。5. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1, characterized in that in step S1, the washing condition is: washing with anhydrous methanol for 5-8 times. 6.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S2中，所述第一中间体、长链卤代烷烃和碳酸氢钠的质量比为1：(1.3～1.5)：(1.4～1.6)；N,N-二甲基甲酰胺的添加量为长链卤代烷烃、第一中间体和碳酸氢钠总质量的3～5倍。6. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1 is characterized in that in step S2, the mass ratio of the first intermediate, the long-chain halogenated alkane and the sodium bicarbonate is 1:(1.3-1.5):(1.4-1.6); the amount of N,N-dimethylformamide added is 3-5 times the total mass of the long-chain halogenated alkane, the first intermediate and the sodium bicarbonate. 7.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S2中，所述搅拌反应的条件为：在20～50℃下磁力搅拌反应5～8h。7. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1 is characterized in that in step S2, the stirring reaction conditions are: magnetic stirring reaction at 20-50°C for 5-8 hours. 8.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S2中，所述洗涤的条件为：用无蒸馏水乙醇洗涤2-3次。8. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1, characterized in that in step S2, the washing condition is: washing with ethanol without distilled water for 2-3 times. 9.根据权利要求1所述用于降压增注的多功能表面活性剂的制备方法，其特征在于，步骤S2中，所述长链卤代烷烃为溴代十二烷、溴代十四烷、溴代十六烷、碘代十二烷、碘代十四烷和碘代十六烷中的一种。9. The method for preparing a multifunctional surfactant for reducing pressure and increasing injection according to claim 1, characterized in that in step S2, the long-chain halogenated alkane is one of dodecane bromide, tetradecane bromide, hexadecane bromide, dodecane iodide, tetradecane iodide and hexadecane iodide. 10.权利要求1～9任意一项所述制备方法制得的用于降压增注的多功能表面活性剂。10. A multifunctional surfactant for reducing pressure and increasing injection obtained by the preparation method according to any one of claims 1 to 9.
CN202411185181.XA 2024-08-27 2024-08-27 A multifunctional surfactant for reducing pressure and increasing injection and its preparation method Pending CN119059944A (en)

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