CN112226220A - High-temperature acidizing corrosion inhibitor and preparation method thereof - Google Patents
High-temperature acidizing corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN112226220A CN112226220A CN202011057298.1A CN202011057298A CN112226220A CN 112226220 A CN112226220 A CN 112226220A CN 202011057298 A CN202011057298 A CN 202011057298A CN 112226220 A CN112226220 A CN 112226220A
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- 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
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Abstract
The invention provides a high-temperature acidizing corrosion inhibitor and a preparation method thereof, belongs to the field of oilfield chemicals, and mainly relates to preparation and application of a novel high-temperature acidizing corrosion inhibitor. The invention mainly aims to solve the problem of corrosion of equipment at high temperature in the acid fracturing construction of the oil field. The corrosion inhibitor performance improvement of the reaction products of benzyl chloride, quinoline, pyridine, ethylenediamine and the like is researched, and the corrosion inhibition synergist mainly comprises alkynol, aldehyde, metal salt, formic acid and the like.
Description
Technical Field
The invention belongs to the technical field of corrosion inhibitor preparation, and particularly relates to a high-temperature acidizing corrosion inhibitor and a preparation method thereof.
Background
At present, with the continuous exploration and development of oil fields at home and abroad, a large number of deep low-permeability oil reservoirs are discovered and exploited, acid is difficult to distribute uniformly during acidification, but the oil and gas fields are required to be constructed by acid fracturing, the depth is gradually deepened, and the formation temperature is increased continuously. However, the injection of the acid liquor can cause serious corrosion of the underground metal pipe, so that sudden rupture accidents of underground equipment can be caused, and meanwhile, the acid-corroded metal ions can also damage the bottom layer, thereby seriously influencing the normal production of the oil field. Therefore, in order to improve the development efficiency of oil and gas wells and improve the oil recovery rate, an efficient corrosion inhibitor needs to be injected in the construction process of the acidizing and fracturing process, and the effect of protecting metal pipelines from corrosion can be better achieved on the premise of not influencing the compatibility of an acid liquid system and the corrosion inhibitor.
The existing conventional acidizing corrosion inhibitor has poor corrosion inhibition effect on the current oil field oil extraction under high-temperature working conditions. The main reasons for this are that some surfactants, urotropine, formaldehyde, metal salts and part of organic solvents contained in the conventional corrosion inhibitor are gradually ineffective at high temperature, the film forming effect is poor, the uniform distribution of diverting acid in the stratum is affected, and the recovery rate of oil field is seriously affected.
Disclosure of Invention
The invention aims to provide a high-temperature acidizing corrosion inhibitor and a preparation method thereof, and aims to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-temperature acidizing corrosion inhibitor comprises the following components in percentage by mass:
further, the paint comprises the following components in percentage by mass:
further, the alkylphenol polyoxyethylene ether is O-15 in type.
Further, selecting the following components in percentage by mass: 30-32% of benzyl chloride, 10-15% of pyridine, 15-20% of quinoline and 3-5% of fatty alcohol-polyoxyethylene ether are sequentially added at the temperature of 120-.
Further, selecting the following components in percentage by mass: 30-32% of benzyl chloride, 10-15% of ethylenediamine, 10-15% of sodium hydroxide, 30-35% of ethanol and 10-20% of water are sequentially put into the reactor at the temperature of 120 ℃ and 130 ℃ for stirring and heating to obtain the quaternary ammonium salt 2.
Further, the preparation method of the high-temperature acidizing corrosion inhibitor comprises the following steps:
(1) firstly, adding quaternary ammonium salt 1 and quaternary ammonium salt 2 according to mass percent, then adding alkylphenol polyoxyethylene and fully stirring;
(2) adding water, and heating in water bath at 50-60 deg.C to obtain clear solution;
(3) then adding synergist propiolic alcohol and formic acid in sequence to obtain the high-temperature acidification corrosion inhibitor.
Compared with the prior art, the invention has the following technical effects:
the invention provides a preparation method and application of a novel high-temperature acidizing corrosion inhibitor, and the novel high-temperature acidizing corrosion inhibitor is simple in synthesis process, low in price, capable of being prepared under normal pressure, free of pollution to the environment, and capable of being applied to different environments such as high temperature and low temperature.
The preparation process is simple, and the production can be finished under normal pressure.
The water-soluble polyvinyl alcohol ether-containing water-soluble polyvinyl alcohol is good in water solubility, can be mutually dissolved with water in any ratio after a proper amount of alkylphenol polyoxyethylene ether is added, and does not need to be additionally added with alcohols or formamide substances as solvents.
The corrosion inhibitor is small in addition, is an aqueous solution, is low in content, has excellent performance and saves cost.
The corrosion inhibitor is environment-friendly, sodium hydroxide is used for adsorbing acidic gas generated by reaction, ethanol is used as a solvent, reactants can fully react, the reaction time is greatly shortened, and wastewater, waste gas and the like are not generated in the production process.
Drawings
FIG. 1 is a graph showing the test results of steel sheets.
Detailed Description
The invention is further illustrated by the following specific examples:
the invention relates to a high-temperature acidizing corrosion inhibitor which comprises the following components in percentage by mass:
the composite material comprises the following components in percentage by mass:
the alkylphenol polyoxyethylene ether is O-15.
Selecting according to the mass ratio: 30-32% of benzyl chloride, 10-15% of pyridine, 15-20% of quinoline and 3-5% of fatty alcohol-polyoxyethylene ether are sequentially added at the temperature of 120-. The purpose of adding the fatty alcohol-polyoxyethylene ether is to increase the water solubility of a sample, enable reactants to fully react in water, and refine the obtained product to obtain the quaternary ammonium salt 1.
Selecting according to the mass ratio: 30-32% of benzyl chloride, 10-15% of ethylenediamine, 10-15% of sodium hydroxide, 30-35% of ethanol and 10-20% of water are sequentially put into the reactor at the temperature of 120 ℃ and 130 ℃ for stirring and heating to obtain the quaternary ammonium salt 2. The sodium hydroxide is used for absorbing acid gas generated by the reaction, the ethanol is used as a solvent, so that reactants can fully react, and the reaction time is greatly shortened. The reaction conditions are mild at the temperature of 120 ℃ and 130 ℃, and the process is simple.
A preparation method of a high-temperature acidizing corrosion inhibitor comprises the following steps:
(1) firstly, adding quaternary ammonium salt 1 and quaternary ammonium salt 2 according to mass percent, then adding alkylphenol polyoxyethylene and fully stirring;
(2) adding water, and heating in water bath at 50-60 deg.C to obtain clear solution;
(3) then adding synergist propiolic alcohol and formic acid in sequence to obtain the high-temperature acidification corrosion inhibitor.
According to the method of the oil and gas industry standard SY/T5405-1996 of the people's republic of China, the performance of the high-temperature corrosion inhibitor at 120 ℃, 140 ℃ and 160 ℃ is tested. All can reach the first-level standard. The high-temperature corrosion inhibitor is universal in each high-temperature section, and the addition of the corrosion inhibitor can be adjusted according to the requirements of different temperature sections.
The corrosion rate of the high-temperature corrosion inhibitor is determined according to the requirements of SY/T5405-1996
| Temperature of | Hydrochloric acid concentration | Addition of corrosion inhibitor | Pressure of | Corrosion rate |
| 120℃ | 20％HCl | 2％ | 16MPa | 16.35 |
| 140℃ | 20％HCl | 3％ | 16MPa | 23.82 |
| 160℃ | 20％HCl | 4％ | 16MPa | 37.21 |
The corrosion inhibitor has obvious corrosion inhibition effect and good film forming property on the surface of the steel sheet.
The steel sheet test results are shown in figure 1.
Claims (6)
1. The high-temperature acidizing corrosion inhibitor is characterized by comprising the following components in percentage by mass:
2. the high-temperature acidizing corrosion inhibitor according to claim 1 is characterized by comprising the following components in percentage by mass:
3. the high temperature acidizing corrosion inhibitor of claim 1 wherein the alkylphenol ethoxylate has the type O-15.
4. The high-temperature acidizing corrosion inhibitor according to claim 1 is characterized in that the mass ratio is selected from the following: 30-32% of benzyl chloride, 10-15% of pyridine, 15-20% of quinoline and 3-5% of fatty alcohol-polyoxyethylene ether are sequentially added at the temperature of 120-.
5. The high-temperature acidizing corrosion inhibitor according to claim 1 is characterized in that the mass ratio is selected from the following: 30-32% of benzyl chloride, 10-15% of ethylenediamine, 10-15% of sodium hydroxide, 30-35% of ethanol and 10-20% of water are sequentially put into the reactor at the temperature of 120 ℃ and 130 ℃ for stirring and heating to obtain the quaternary ammonium salt 2.
6. A method for preparing a high-temperature acidizing corrosion inhibitor, which is based on any one of the claims 1 to 6, and comprises the following steps:
(1) firstly, adding quaternary ammonium salt 1 and quaternary ammonium salt 2 according to mass percent, then adding alkylphenol polyoxyethylene and fully stirring;
(2) adding water, and heating in water bath at 50-60 deg.C to obtain clear solution;
(3) then adding synergist propiolic alcohol and formic acid in sequence to obtain the high-temperature acidification corrosion inhibitor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612473A (en) * | 2022-10-11 | 2023-01-17 | 中国科学院兰州化学物理研究所 | High-temperature-resistant acidizing corrosion inhibitor, preparation method and application thereof, and corrosion-inhibiting acidizing fracturing fluid |
| CN115785932A (en) * | 2022-11-09 | 2023-03-14 | 中石化石油工程技术服务有限公司 | Lactic acid acidification corrosion inhibitor and preparation method thereof |
| CN116285925A (en) * | 2023-02-24 | 2023-06-23 | 山东奥必通石油技术股份有限公司 | High-temperature corrosion inhibitor for high-concentration hydrochloric acid acidizing fluid and preparation method thereof |
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| CN108359438A (en) * | 2018-02-05 | 2018-08-03 | 西安石油大学 | One kind being suitable for 160 DEG C ~ 180 DEG C of high-temperature acidification corrosion inhibitors and its preparation method and application |
| CN108753271A (en) * | 2018-07-23 | 2018-11-06 | 中石化石油工程技术服务有限公司 | A kind of acidification composite corrosion inhibitor and preparation method thereof |
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2020
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Patent Citations (5)
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| CN105694836A (en) * | 2016-01-05 | 2016-06-22 | 南京华洲新材料有限公司 | Diverting acid acidizing corrosion inhibitor and preparation method thereof |
| CN106367057A (en) * | 2016-08-27 | 2017-02-01 | 中国石油集团渤海钻探工程有限公司 | Corrosion inhibitor used for acidizing and resisting to high temperature of 140-160 DEG C and preparation method for inhibitor |
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| CN108753271A (en) * | 2018-07-23 | 2018-11-06 | 中石化石油工程技术服务有限公司 | A kind of acidification composite corrosion inhibitor and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612473A (en) * | 2022-10-11 | 2023-01-17 | 中国科学院兰州化学物理研究所 | High-temperature-resistant acidizing corrosion inhibitor, preparation method and application thereof, and corrosion-inhibiting acidizing fracturing fluid |
| CN115612473B (en) * | 2022-10-11 | 2023-07-04 | 中国科学院兰州化学物理研究所 | High-temperature-resistant acidizing corrosion inhibitor, preparation method and application thereof, and corrosion-inhibiting acidizing fracturing fluid |
| CN115785932A (en) * | 2022-11-09 | 2023-03-14 | 中石化石油工程技术服务有限公司 | Lactic acid acidification corrosion inhibitor and preparation method thereof |
| CN115785932B (en) * | 2022-11-09 | 2023-11-14 | 中石化石油工程技术服务有限公司 | Lactic acid acidification corrosion inhibitor and preparation method thereof |
| CN116285925A (en) * | 2023-02-24 | 2023-06-23 | 山东奥必通石油技术股份有限公司 | High-temperature corrosion inhibitor for high-concentration hydrochloric acid acidizing fluid and preparation method thereof |
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