CN108485625B - Anionic nonionic surfactant thickened oil viscosity-reducing oil displacement agent and preparation method and application thereof - Google Patents
Anionic nonionic surfactant thickened oil viscosity-reducing oil displacement agent and preparation method and application thereof Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 24
- 239000002736 nonionic surfactant Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 125000000129 anionic group Chemical group 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims abstract description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007259 addition reaction Methods 0.000 claims abstract description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 230000018044 dehydration Effects 0.000 claims abstract description 5
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 5
- 238000006845 Michael addition reaction Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 239000000376 reactant Substances 0.000 claims description 9
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000012670 alkaline solution Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 51
- 238000004945 emulsification Methods 0.000 abstract description 8
- 239000010779 crude oil Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 150000001412 amines Chemical class 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- 239000003945 anionic surfactant Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- -1 sodium fatty alcohol Chemical class 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 description 3
- 229920001289 polyvinyl ether Polymers 0.000 description 3
- XUJLWPFSUCHPQL-UHFFFAOYSA-N 11-methyldodecan-1-ol Chemical compound CC(C)CCCCCCCCCCO XUJLWPFSUCHPQL-UHFFFAOYSA-N 0.000 description 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- BXWNKGSJHAJOGX-UHFFFAOYSA-N n-hexadecyl alcohol Natural products CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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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
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/04—Formation of amino groups in compounds containing carboxyl groups
- C07C227/06—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid
- C07C227/08—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid by reaction of ammonia or amines with acids containing functional groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/18—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
Abstract
The invention relates to a negative nonionic surfactant thick oil viscosity reduction oil displacement agent and a preparation method and application thereof, wherein long-chain polyetheramine and methyl acrylate are subjected to Michael addition reaction in a solvent for 5-12h according to a molar ratio of 1: 1-2, then a product of the addition reaction is subjected to hydrolysis reaction in an alkali solution for 5-12h, then the pH value is adjusted to 6.0-7.0 by using dilute sulfuric acid with a V/V ratio of 1:1, and water is supplemented until the solid content is 35%, so that the thick oil viscosity reduction oil displacement agent is obtained. The thick oil viscosity-reducing oil displacement agent disclosed by the invention is low in interfacial tension value and good in emulsification and viscosity-reducing effects, emulsified crude oil can be automatically demulsified, and the dehydration rate is more than 80%.
Description
Technical Field
The invention belongs to the field of oil displacement agents, and particularly relates to a viscosity reduction oil displacement agent for thickened oil of a negative nonionic surfactant, and a preparation method and application thereof.
Background
The recovery of heavy oil is becoming more and more important as oil fields are developed. The heavy oil contains more colloid and asphaltene, has higher viscosity and poor fluidity, brings inconvenience to exploitation, such as pump lag, no removal of polished rod, increased load of a pumping unit, difficulty in starting pumping, increased back pressure, easy blockage of a pipeline and the like, and the recovery ratio of a heavy oil block is also lower. The development mode, technology, process and management of the thickened oil are different according to different specific conditions. The chemical viscosity reducing method is an economic, convenient and commonly used exploitation method, in the emulsification and viscosity reduction process, a surfactant with good water solubility is used as an emulsifier, and an emulsifier aqueous solution with a certain concentration is injected into an oil well to disperse crude oil to form O/W type emulsion, so that the viscosity and friction resistance are greatly reduced.
The most widely used today are anionic and nonionic surfactants. The anionic surfactant has high interfacial activity and good temperature resistance, but has poor salt resistance, and the surfactant can be separated out in water with high salt content; the nonionic surfactant has good salt resistance and polyvalent cation resistance, but has poor stability in stratum, higher adsorption capacity than the anionic surfactant, poor solubility and no high temperature resistance.
The anionic-nonionic surfactant has two hydrophilic groups (nonionic group and anionic group) with different properties designed in the same surfactant molecule, can combine the advantages of anionic and nonionic surfactants, forms an amphoteric surfactant with complementary advantages and excellent performance, and is suitable for oil reservoirs with high temperature and salt content. For formation water with different salt contents, the hydrophilic-lipophilic balance value of the surfactant can be adjusted by adjusting the size of alkoxy chain links in the molecules of the surfactant, so that efficient emulsification, viscosity reduction and oil displacement are achieved.
The sodium fatty alcohol polyoxyethylene ether carboxylate and the sodium fatty alcohol polyoxyethylene ether sulfonate have lower interfacial tension and emulsification viscosity reduction effects, but organic chlorine raw materials (sodium chloroacetate, thionyl chloride and phosphorus trichloride) are needed in the production process, so that organic chlorine can be remained in the final product, and the residual organic chlorine can influence the crude oil refining in the later period.
Disclosure of Invention
The invention aims to provide a viscosity-reducing oil displacement agent of a negative nonionic surfactant for thickened oil, and a preparation method and application thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: a viscosity-reducing oil-displacing agent of anionic nonionic surfactant for thick oil has a general structural formula
Wherein m ranges from 0 to 10, n ranges from 0 to 10, and x ranges from 0 to 1; r is H3C-(CH2)y-、
Or a mixture of the two, wherein y is 8-15.
The preparation method of the anionic nonionic surfactant thickened oil viscosity-reducing oil displacement agent comprises the following steps:
(a) carrying out Michael addition reaction on long-chain polyetheramine and methyl acrylate in a solvent according to a molar ratio of 1: 1-2 for 5-12h,
(b) performing hydrolysis reaction on the product of the addition reaction in an alkali solution for 5-12h, then adjusting the pH to 6.0-7.0 by using dilute sulfuric acid with the V/V ratio of 1:1, supplementing water until the solid content is 35 percent, obtaining the thick oil viscosity-reducing oil-displacing agent,
wherein R is H3C-(CH2)y-、
Or a mixture of the two, y is 8-15; the value range of m is 0-10, the value range of n is 0-10, and the value range of x is 0-1.
Specifically, the solvent in the step (a) is one or more of methanol, ethanol, isopropanol and water, and the amount of the solvent is 20 wt% of the total amount of the reactants.
Specifically, the alkali solution in the step (b) is a sodium hydroxide solution with the mass fraction of 20-40%.
Specifically, the molar ratio of the product to the alkali in the step (b) is 1: 1-2.
The application of the anionic nonionic surfactant thick oil viscosity reduction oil displacement agent is used for viscosity reduction and oil displacement of thick oil in an oil field, 0.3% aqueous solution is prepared by 5000-50000 mg/L standard mineralized water, and the oil-water interfacial tension is less than or equal to 1.0 multiplied by 10-1mN/m, the viscosity reduction rate is more than or equal to 90 percent, and the dehydration rate is more than or equal to 80 percent.
The invention has the following beneficial effects: the thick oil viscosity-reducing oil displacement agent disclosed by the invention is low in interfacial tension value and good in emulsification and viscosity-reducing effects, emulsified crude oil can be automatically demulsified, and the dehydration rate is more than 80%.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the scope of the present invention is not limited to these examples. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
A viscosity-reducing oil-displacing agent of anionic nonionic surfactant for thick oil has a general structural formula
Wherein m ranges from 0 to 10, n ranges from 0 to 10, and x ranges from 0 to 1; r is H3C-(CH2)y-、
Or a mixture of the two, wherein y is 8-15.
The preparation method of the anionic nonionic surfactant thickened oil viscosity-reducing oil displacement agent comprises the following steps:
(a) carrying out Michael addition reaction on long-chain polyetheramine and methyl acrylate in a solvent according to a molar ratio of 1: 1-2 for 5-12h, wherein the solvent accounts for 20 wt% of the total amount of reactants, the solvent is one or more of methanol, ethanol, isopropanol and water,
(b) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 20-40% for 5-12h, wherein the molar ratio of the product to the sodium hydroxide is 1: 1-2, adjusting the pH to 6.0-7.0 by using dilute sulfuric acid with the V/V being 1:1, supplementing water until the solid content is 35%, thus obtaining the thick oil viscosity-reducing oil displacement agent,
wherein R is H3C-(CH2)y-、
Or a mixture of the two, y is 8-15; the value range of m is 0-10, the value range of n is 0-10, and the value range of x is 0-1.
Example 1
Adding methanol which accounts for 20 wt% of the total amount of reactants into a three-neck flask, adding lauryl polyoxyethylene ether amine (4EO) and methyl acrylate according to the molar ratio of 1:1, introducing nitrogen to remove oxygen for 10min, heating to 50 ℃, and carrying out addition reaction for 5 h;
and (3) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 30% for 5h, wherein the molar ratio of the product to the sodium hydroxide is 1:1, then adjusting the pH to 6.5 by using dilute sulfuric acid with the V/V ratio of 1:1, and supplementing water until the solid content is 35%, thus obtaining the thick oil viscosity-reducing oil displacement agent.
Example 2
Adding 20 wt% of ethanol in the total amount of reactants into a three-neck flask, adding nonylphenol polyvinyl ether amine (4EO) and methyl acrylate according to the molar ratio of 1:2, introducing nitrogen to remove oxygen for 10min, heating to 50 ℃, and carrying out addition reaction for 8 h;
and (3) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 35% for 10 hours, wherein the molar ratio of the product to the sodium hydroxide is 1:1.5, adjusting the pH to 7 by using dilute sulfuric acid with the V/V ratio of 1:1, and supplementing water until the solid content is 35% to obtain the thick oil viscosity-reducing oil displacement agent.
Example 3
Adding isopropanol which accounts for 20 wt% of the total amount of reactants into a three-neck flask, adding isotridecanol polyvinyl ether amine (2EO) and methyl acrylate according to the molar ratio of 1:1.2, introducing nitrogen to remove oxygen for 10min, heating to 50 ℃, and carrying out addition reaction for 12 h;
and (3) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 20% for 8h, wherein the molar ratio of the product to the sodium hydroxide is 1:1.3, adjusting the pH to 6.5 by using dilute sulfuric acid with the V/V ratio of 1:1, and supplementing water until the solid content is 35% to obtain the thick oil viscosity-reducing oil displacement agent.
Example 4
Adding water accounting for 20 wt% of the total amount of reactants into a three-neck flask, adding isotridecanol polyvinyl ether amine (2EO) and methyl acrylate according to the molar ratio of 1:1.5, introducing nitrogen to remove oxygen for 10min, heating to 50 ℃, and carrying out addition reaction for 10 h;
and (3) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 40% for 12h, wherein the molar ratio of the product to the sodium hydroxide is 1:2, adjusting the pH to 6 by using dilute sulfuric acid with the V/V of 1:1, and supplementing water until the solid content is 35% to obtain the thick oil viscosity-reducing oil displacement agent.
Example 5
Adding methanol which accounts for 20 wt% of the total amount of reactants into a three-neck flask, adding cetyl alcohol poly (propylene ether amine) (2PO) and methyl acrylate according to the molar ratio of 1:1.8, introducing nitrogen to remove oxygen for 10min, heating to 50 ℃, and carrying out addition reaction for 10 h;
and (3) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 30% for 7h, wherein the molar ratio of the product to the sodium hydroxide is 1:1.2, adjusting the pH to 6 by using dilute sulfuric acid with the V/V ratio of 1:1, and supplementing water until the solid content is 35% to obtain the thick oil viscosity-reducing oil displacement agent.
Example 6
Adding isopropanol which accounts for 20 wt% of the total amount of reactants into a three-neck flask, adding nonylphenol poly (propylene ether amine) (3PO) and methyl acrylate according to the molar ratio of 1:1.5, introducing nitrogen to remove oxygen for 10min, heating to 50 ℃, and carrying out addition reaction for 5 h;
and (3) performing hydrolysis reaction on the product of the addition reaction in a sodium hydroxide solution with the mass fraction of 20% for 10 hours, wherein the molar ratio of the product to the sodium hydroxide is 1:1.8, adjusting the pH to 6.5 by using dilute sulfuric acid with the V/V ratio of 1:1, and supplementing water until the solid content is 35% to obtain the thick oil viscosity-reducing oil displacement agent.
Example 7:
1) the viscosity-reducing oil-displacing agent for thick oil prepared in examples 1-6 is prepared into an aqueous solution of 0.3% by mass of an emulsification viscosity-reducing oil-displacing agent (30 g of the emulsification viscosity-reducing oil-displacing agent is diluted to 30g by using 0.09g of injected water) by using 5000-50000 mg/L of standard mineralized water, and the aqueous solution is placed on a magnetic stirrer to be stirred for 5min, so that the emulsification viscosity-reducing oil-displacing agent is completely dissolved.
2) And (5) placing the dehydrated oil sample in a water bath with the formation temperature for keeping the temperature for 60 min.
3) Weighing 70g of constant-temperature Chenjiazhu oil field oil sample into a beaker, adding 30g of the sample solution prepared in the step (1) with the oil-water ratio of 7:3, placing the obtained mixture into a constant-temperature water bath at the formation temperature, keeping the temperature for 60min, taking out the obtained product after constant temperature, placing the obtained product on a high-speed stirrer, placing a stirring paddle in the center of the beaker, keeping the distance from the bottom of the beaker to be 2-3mm, adjusting the rotating speed to be 3000r/min, and stirring for 3min to obtain the final O/W type emulsion finished product of the oil sample. And (3) testing the viscosity value of the emulsion at the formation temperature by adopting a BROOKFIELD DV-III + Pro viscometer and selecting an s64 model rotor at the rotating speed of 15r/min, and calculating the viscosity reduction rate.
4) And (3) taking 100 g of the finished O/W type emulsion of the final oil sample, standing at the formation temperature for 1h, recording the volume of the precipitated water, and calculating the dehydration rate.
Claims (5)
1. The viscosity-reducing oil displacement agent of the anionic nonionic surfactant for the thick oil is characterized by having a structural general formula
Wherein m is more than 0 and less than or equal to 10, n is more than 0 and less than or equal to 10, and the value range of x is 0-1; r is H3C-(CH2)y-、
Or a mixture of the two, wherein y is 8-15;
the preparation method comprises the following steps:
(a) carrying out Michael addition reaction on long-chain polyetheramine and methyl acrylate in a solvent according to a molar ratio of 1: 1-2 for 5-12h,
(b) performing hydrolysis reaction on the product of the addition reaction in an alkali solution for 5-12h, then adjusting the pH to 6.0-7.0 by using dilute sulfuric acid with the V/V ratio of 1:1, supplementing water until the solid content is 35 percent, obtaining the thick oil viscosity-reducing oil-displacing agent,
wherein R is H3C-(CH2)y-、
Or a mixture of the two, y is 8-15; m is more than 0 and less than or equal to 10, n is more than 0 and less than or equal to 10, and the value range of x is 0-1.
2. The anionic nonionic surfactant thick oil viscosity-reducing oil-displacing agent according to claim 1, wherein the solvent in step (a) is one or more of methanol, ethanol, isopropanol and water, and the amount of the solvent is 20 wt% of the total amount of the reactants.
3. The anionic nonionic surfactant thick oil viscosity-reducing oil-displacing agent of claim 1, wherein the alkaline solution in the step (b) is a sodium hydroxide solution with a mass fraction of 20-40%.
4. The anionic nonionic surfactant thick oil viscosity-reducing oil-displacing agent according to claim 1, wherein the molar ratio of the product to the alkali in the step (b) is 1: 1-2.
5. The use of the anionic nonionic surfactant thick oil viscosity reduction oil displacement agent as claimed in claim 1, characterized in that for viscosity reduction oil displacement of thick oil in oil field, 5000-50000 mg/L standard mineralized water is used to prepare 0.3% aqueous solution, and the oil-water interfacial tension is less than or equal to 1.0 x 10-1mN/m, the viscosity reduction rate is more than or equal to 90 percent, and the dehydration rate is more than or equal to 80 percent.
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| CN113004713A (en) * | 2021-01-28 | 2021-06-22 | 江西三越新材料有限公司 | Production method of phthalocyanine blue anti-flooding dispersant |
| CN114350383A (en) * | 2021-12-30 | 2022-04-15 | 艾茵化学(深圳)有限公司 | Novel fatty alcohol ether carboxylic acid surfactant and preparation method thereof |
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