CN111321412A - High-salt-content weak-acid oil field water quality corrosion inhibitor with chloride ion content of more than 5 ten thousand ppm - Google Patents
High-salt-content weak-acid oil field water quality corrosion inhibitor with chloride ion content of more than 5 ten thousand ppm Download PDFInfo
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- CN111321412A CN111321412A CN202010223790.5A CN202010223790A CN111321412A CN 111321412 A CN111321412 A CN 111321412A CN 202010223790 A CN202010223790 A CN 202010223790A CN 111321412 A CN111321412 A CN 111321412A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
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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
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention relates to a high-salt-content weak-acidic corrosion inhibitor for water quality of an oil field, which has chloride ion content of more than 5 ten thousand ppm and is prepared from the following components in percentage by weight: phosphate salt: 8-12%, dispersant: 1-3%, molybdate: 1-5%, quinoline quaternary ammonium salt: 3-5% and imidazoline quaternary ammonium salt: 10-20%, alkynol: 2-5%, peregal O-25: 3-5%, organic amine: 8-12%, water: 33 to 64 percent. In the components, the phosphate and the dispersant precipitate and disperse scale forming ions to avoid corrosion under the scale. Molybdate, quinoline quaternary ammonium salt, imidazoline quaternary ammonium salt, alkynol and organic amine play a role in corrosion inhibition. The effective concentration of the invention can reach 41-51%, and the invention is especially suitable for Ca-containing2+、Mg2+、Na+And Cl‑The corrosion inhibitor has excellent corrosion inhibition performance under the weakly acidic water environment with high salt content and high chlorine content, and particularly has excellent corrosion inhibition effect on the pitting corrosion phenomenon of chloride ions.
Description
Technical Field
The invention relates to a high-salt-content weak-acid corrosion inhibitor for water quality of an oil field, wherein the content of chloride ions is more than 5 ten thousand ppm.
Background
In recent years, most oil fields in China enter a high-water-content exploitation period, corrosion conditions of oil wells, pipelines and ground equipment become more and more serious, the use conditions of the oil field equipment mainly bear loads and environments, and the severe use environment causes corrosion to become one of main reasons for damaging the oil field equipment. The corrosion not only makes the production of the oil field possible to stop production and stop work, but also can directly destroy and scrap the oil field equipment when the corrosion is serious. Corrosion has become one of the barriers to the development of the petroleum industry, and has severely affected the safety and economy of oil field production.
Aiming at the content of dissolved oxygen and H in the years2S, containing CO2The research and the products of the water quality of the oil field with high salt content are many, but the research and the products of the water quality of the oil field with high salt content and high chloride ion content are relatively few, and particularly the research and the products of the water quality of the oil field with high salt content and high chloride ion content are basically not good for the products of the water with high salt content, the chloride ion content of which is more than 5 ten thousand ppm.
Disclosure of Invention
The invention aims to provide a high-salt-content weak-acidic corrosion inhibitor for water quality of an oil field, which has chloride ion content of more than 5 ten thousand ppm and aims at overcoming the defects of the prior art.
The purpose of the invention is realized by the following technical scheme: the high-salt-content weak-acid corrosion inhibitor with the chloride ion content of more than 5 ten thousand ppm for the water quality of the oil field is prepared from the following components in percentage by weight:
the phosphate is one of disodium hydrogen phosphate and sodium hexametaphosphate.
The dispersant is one of disodium ethylene diamine tetraacetate, sodium gluconate and hydroxyethylidene diphosphonic acid.
The molybdate is one of sodium molybdate and ammonium molybdate.
The quinoline quaternary ammonium salt is a product synthesized by quinoline and chloroacetic acid. The synthesis process is as follows: the molar ratio of quinoline to chloroacetic acid is 1: 1.05-1.10, adding quinoline into a three-neck flask provided with a reflux condenser, a stirrer and a thermometer, then dropwise adding chloroacetic acid while stirring, heating to 110-120 ℃, reacting for 4-6 hours, cooling after the reaction is finished to obtain a crude product, then recrystallizing by using isopropanol as a solvent, filtering and drying to obtain the quinoline quaternary ammonium salt product.
The imidazoline quaternary ammonium salt is a synthetic product of oleic acid, ethylene diamine tetraacetic acid and chloroacetic acid. The synthesis process is as follows: the molar ratio of oleic acid, diethylenetriamine, chloroacetic acid and xylene is 1: 1.00-1.10: 1.05-1.10: 0.20-0.50, putting a certain amount of oleic acid into a three-neck flask, using dimethylbenzene as a water carrying agent, dropwise adding diethylenetriamine when the temperature is raised to 110-120 ℃, heating to 140-160 ℃ after dropwise adding, performing amidation dehydration for 3-5 h at the temperature, performing cyclization reaction for 3-4 h at 220-240 ℃, finally cooling to 50-60 ℃, adding a quaternization reagent chloroacetic acid, and reacting for 2-3 h to obtain the imidazoline quaternary ammonium salt.
The alkynol is one of methylbutynol, propiolic alcohol and trimethylsilyl propiolic alcohol.
The organic amine is one of monoethanolamine, diethanolamine and hexamethylenetetramine.
Among the components, the phosphate and the dispersant mainly play roles in precipitating and dispersing scale forming ions so as to avoid corrosion under the scale. Molybdate, quinoline quaternary ammonium salt, imidazoline quaternary ammonium salt, alkynol and organic amine mainly play a role in corrosion inhibition. The effective concentration of the invention can reach 41-51%, and the invention is especially suitable for Ca-containing2+、Mg2+、Na+And CL-The corrosion inhibitor has excellent corrosion inhibition performance under a weakly acidic water environment with high salt content and high chlorine content, and particularly has better corrosion inhibition effect on the pitting corrosion phenomenon of chloride ions than similar products.
Detailed Description
Example 1:
dissolving 5g of ammonium molybdate, 2g of ethylene diamine tetraacetic acid and 8g of sodium hexametaphosphate in water to prepare a solution, adding 3g of peregal O-25 and 5g of methylbutynol, fully stirring and dissolving, wherein the quinoline quaternary ammonium salt is a synthetic product of quinoline and chloroacetic acid, and the synthetic process is as follows: the molar ratio of quinoline to chloroacetic acid is 1: 1.05, adding quinoline into a three-neck flask provided with a reflux condenser, a stirrer and a thermometer, then dropwise adding chloroacetic acid while stirring, heating to 110 ℃, reacting for 4 hours, cooling after the reaction is finished, obtaining a crude product, then recrystallizing by using isopropanol as a solvent, filtering and drying to obtain the quinoline quaternary ammonium salt product. The imidazoline quaternary ammonium salt is a synthetic product of oleic acid, diethylenetriamine and chloroacetic acid, and the synthetic process is as follows: the molar ratio of oleic acid, diethylenetriamine, chloroacetic acid and xylene is 1: 1.00: 1.05: 0.20, putting a certain amount of oleic acid into a three-neck flask, using dimethylbenzene as a water carrying agent, dropwise adding diethylenetriamine when the temperature is raised to 110 ℃, raising the temperature to 140 ℃ after the dropwise adding is finished, carrying out amidation dehydration for 3h at the temperature, then carrying out cyclization reaction for 3h at 220 ℃, finally adding a quaternization reagent chloroacetic acid when the temperature is lowered to 50 ℃, and reacting for 2h to obtain the imidazoline quaternary ammonium salt. Then adding 5g of quinoline quaternary ammonium salt and 15g of imidazoline quaternary ammonium salt, stirring uniformly, adding 8g of monoethanolamine, and finally adding the rest water to make the total liquid amount reach 100g, thus obtaining the finished product.
Example 2:
dissolving 3g of sodium molybdate, 3g of sodium gluconate and 12g of disodium hydrogen phosphate in water to prepare a solution, adding 5g of peregal O-25 and 3g of propiolic alcohol, fully stirring and dissolving, wherein the quinoline quaternary ammonium salt is a synthetic product of quinoline and chloroacetic acid, and the synthetic process is as follows: the molar ratio of quinoline to chloroacetic acid is 1: 1.10, adding quinoline into a three-neck flask provided with a reflux condenser, a stirrer and a thermometer, then dropwise adding chloroacetic acid while stirring, heating to 120 ℃, reacting for 6 hours, cooling after the reaction is finished, obtaining a crude product, then recrystallizing by using isopropanol as a solvent, filtering and drying to obtain the quinoline quaternary ammonium salt product. The imidazoline quaternary ammonium salt is a synthetic product of oleic acid, diethylenetriamine and chloroacetic acid, and the synthetic process is as follows: the molar ratio of oleic acid, diethylenetriamine, chloroacetic acid and xylene is 1: 1.10: 1.10: 0.50, putting a certain amount of oleic acid into a three-neck flask, using dimethylbenzene as a water carrying agent, dropwise adding diethylenetriamine when the temperature is raised to 120 ℃, raising the temperature to 160 ℃ after the dropwise adding is finished, carrying out amidation dehydration for 5h at the temperature, then carrying out cyclization reaction for 4h at the temperature of 240 ℃, finally adding a quaternization reagent chloroacetic acid when the temperature is lowered to 60 ℃, and reacting for 3h to obtain the imidazoline quaternary ammonium salt. Then adding 3g of quinoline quaternary ammonium salt and 20g of imidazoline quaternary ammonium salt, stirring uniformly, adding 10g of hexamethylenetetramine, and finally adding the rest water to ensure that the total liquid amount reaches 100g, thus obtaining the finished product.
Preparing high-chloride-ion-content high-salt water:
50g of anhydrous CaCL was weighed235gNaCL and 32gMgCL2.6H2Dissolving O in 500ml of distilled water, stirring and dissolving, transferring to a 1000ml volumetric flask, diluting to full scale with distilled water, and fully shaking for later use. This is achieved byThe chloride ion content of the prepared water is as high as 6.5 ten thousand ppm.
And (3) corrosion inhibition rate determination:
the test piece preparation was carried out according to the specification of 4.7.5 "test piece" in SY/T5273-2014.
The test medium is used in an amount of 1cm per unit2The surface area of the test piece is 20ml of prepared high-chloride ion and high-salt water.
Test temperature of 60 deg.C+Standing at 1 deg.C for 7-14 days.
The corrosion inhibition calculation was carried out as specified in SY/T5273-2014, 4.7.7.1.
Test data:
example 1
Example 2
Evaluation of the effects:
Claims (8)
1. the corrosion inhibitor with chloride ion content of more than 5 ten thousand ppm for the water quality of the weak acid oil field with high salt content is characterized in that: the paint is prepared from the following components in percentage by weight:
2. the corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the phosphate is one of disodium hydrogen phosphate and sodium hexametaphosphate.
3. The corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the dispersant is one of disodium ethylene diamine tetraacetate, sodium gluconate and hydroxyethylidene diphosphonic acid.
4. The corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the molybdate is one of sodium molybdate and ammonium molybdate.
5. The corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the quinoline quaternary ammonium salt is a synthetic product of quinoline and chloroacetic acid, and the synthetic process is as follows: the molar ratio of quinoline to chloroacetic acid is 1: 1.05-1.10, adding quinoline into a three-neck flask provided with a reflux condenser, a stirrer and a thermometer, then dropwise adding chloroacetic acid while stirring, heating to 110-120 ℃, reacting for 4-6 hours, cooling after the reaction is finished to obtain a crude product, then recrystallizing by using isopropanol as a solvent, filtering and drying to obtain the quinoline quaternary ammonium salt product.
6. The corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the imidazoline quaternary ammonium salt is a synthetic product of oleic acid, diethylenetriamine and chloroacetic acid, and the synthetic process is as follows: the molar ratio of oleic acid, diethylenetriamine, chloroacetic acid and xylene is 1: 1.00-1.10: 1.05-1.10: 0.20-0.50, putting a certain amount of oleic acid into a three-neck flask, using dimethylbenzene as a water carrying agent, dropwise adding diethylenetriamine when the temperature is raised to 110-120 ℃, heating to 140-160 ℃ after dropwise adding, performing amidation dehydration for 3-5 h at the temperature, performing cyclization reaction for 3-4 h at 220-240 ℃, finally cooling to 50-60 ℃, adding a quaternization reagent chloroacetic acid, and reacting for 2-3 h to obtain the imidazoline quaternary ammonium salt.
7. The corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the alkynol is one of methylbutynol, propiolic alcohol and trimethylsilyl propiolic alcohol.
8. The corrosion inhibitor for the water quality of the weak acidic oil field with high salt content and chloride ion content of more than 5 ten thousand ppm as claimed in claim 1, which is characterized in that: the organic amine is one of monoethanolamine, diethanolamine and hexamethylenetetramine.
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| CN112680734A (en) * | 2020-12-09 | 2021-04-20 | 鞍钢集团矿业有限公司 | Corrosion inhibitor suitable for acidic medium and preparation method and application thereof |
| CN114907830A (en) * | 2021-02-07 | 2022-08-16 | 中国石油天然气股份有限公司 | Chloride stress corrosion cracking inhibitor for 13Cr stainless steel, preparation and application thereof |
| CN117051398A (en) * | 2023-08-21 | 2023-11-14 | 河北大沧石化科技有限公司 | Environment-friendly gas-liquid two-phase corrosion inhibitor |
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