WO2022152193A1

WO2022152193A1 - CORROSION INHIBITOR SUITABLE FOR ACIDIFICATION AT 200ºC AND USE THEREOF

Info

Publication number: WO2022152193A1
Application number: PCT/CN2022/071731
Authority: WO
Inventors: 张兴德; 原励; 张燕; 黄晨直; 王川; 刘爽; 吴丽
Original assignee: 中国石油天然气股份有限公司
Priority date: 2021-01-13
Filing date: 2022-01-13
Publication date: 2022-07-21
Also published as: CN114763614B; CN114763614A

Abstract

Provided are a corrosion inhibitor suitable for acidification at 200ºC and the use thereof. The corrosion inhibitor for acidification comprises a component A. The component A comprises, in percentages by weight: an aldehyde-ketone-amine condensate, a quinoline quaternary ammonium salt, an organic acid, an alkynol derivative, an organic synergist, an alcohol solvent, a dispersant and water, wherein the quinoline quaternary ammonium salt is synthesized by a quaternization reaction of at least one of benzyl chloride, phenethyl alcohol, phenylbutanol and cetyldimethylbenzylammonium chloride with quinoline.

Description

Corrosion inhibitor suitable for acidizing at 200℃ and its application

technical field

The invention relates to the technical field of oil and gas reservoir stimulation and transformation, in particular to a corrosion inhibitor suitable for acidification at 200° C. and application thereof.

Background technique

Acidizing is an important measure for stimulation and stimulation of oil and gas wells. Acid is injected into the formation through the wellbore, and the chemical reaction between the acid and some minerals in the formation is used to dissolve the connected pores or fracture wall rocks in the reservoir, and increase the communication between pores and fracture conductivity. ability to achieve the purpose of increasing the production of oil and gas wells. During the acidizing process, the acid liquid will corrode the downhole pipe string, so it is necessary to add a corrosion inhibitor to the acid liquid, so as to inhibit or slow down the corrosion of the acid liquid to the downhole pipe string.

In the related technology inquiry, there are only 2 patent applications for corrosion inhibitors that can withstand temperature up to 200 °C. Among them, the patent application with the patent application number of 201611200455.3 provides the main components of sodium oleoyl sarcosinate, mercaptobenzothiazole, polyvinyl A corrosion inhibitor for the acidification of amines. Although the corrosion inhibitor for acidification can achieve a maximum temperature resistance of 240°C, the corrosion inhibition rate is only about 23 g/m ² ·h, and the effect is achieved under the conditions of 22% HCl and 8% HF. The patent application with the patent application number of 201310609361.1 provides a corrosion inhibitor for acidification with acetophenone, trioxymethylene, and cyclohexylamine as the main components. This patent application only illustrates the advantages of low corrosion inhibition rate and low cost, but No specific evaluation index of corrosion effect is given.

In the process of realizing the present invention, the present inventor found that there are at least the following problems in the related art:

Corrosion inhibitors for acidification provided by related technologies are mostly used under the condition of well temperature of 160°C. With the gradual development of oil and gas exploration to deep and ultra-deep reservoirs, the well depth exceeds 7000m, and the bottom hole temperature is generally above 160°C. The maximum temperature at the bottom of the oil well and the temperature in the construction section exceeds 200 °C. Corrosion inhibitors for acidification provided by related technologies can no longer meet the needs of deep and ultra-deep reservoirs whose temperature reaches 200°C. Therefore, there is an urgent need to provide a corrosion inhibitor for acidification with high temperature resistance.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, an object of the present invention is to provide a corrosion inhibitor for acidification suitable for use at 200°C. The corrosion inhibitor for acidification can meet the needs of deep and ultra-deep reservoir stimulation.

Another object of the present invention is to provide the application of the corrosion inhibitor for acidification.

In order to achieve the above purpose, on the one hand, the present invention provides a corrosion inhibitor for acidification suitable for use at 200° C. The corrosion inhibitor for acidification includes component A, wherein, in parts by weight, the component A includes The following components: aldosterone amine condensate: 30-45 parts; organic acid: 1-17 parts; alkynol derivative: 3-10 parts; organic synergist: 15-40 parts; alcohol solvent: 5-15 parts; dispersant: 5-15 parts.

According to some specific embodiments of the present invention, the above-mentioned component A may further include a quinoline quaternary ammonium salt, and the quinoline quaternary ammonium salt can further improve the temperature resistance and corrosion inhibition ability of the corrosion inhibitor. In a specific embodiment, the component A may include the following components: aldolamine condensate: 30 parts-45 parts; quinoline quaternary ammonium salt: 5 parts-8 parts; organic acid: 1 part-17 parts; Alkynyl alcohol derivative: 3 parts to 10 parts; organic synergist: 15 parts to 40 parts; alcohol solvent: 5 parts to 15 parts; dispersant: 5 parts to 15 parts, wherein, the quinoline quaternary ammonium salt can be It is synthesized from the combination of one or more of benzyl chloride, benzyl methanol, benzyl propanol and hexadecyl dimethyl benzyl ammonium chloride and quinoline through quaternization reaction.

In a specific embodiment of the present invention, the above-mentioned component A is generally used in the form of a solution prepared by mixing with water.

According to some specific embodiments of the present invention, in percentage by weight (ie, based on the total weight of component A as 100%), the component A includes the following components: aldolamine condensate: 30%-45% ; Quinoline quaternary ammonium salt: 5%-8%; Organic acid: 1%-10%; Alkynol derivatives: 3%-10%; Organic synergist: 15%-40%; Alcohol solvent: 5%- 15%; dispersant: 5%-15%; the balance is water; the quinoline quaternary ammonium salt can be composed of benzyl chloride, benzyl methanol, benzyl propanol and cetyl dimethyl benzyl ammonium chloride. One or more combinations of quinoline and quinoline are synthesized by quaternization reaction.

According to some specific embodiments of the present invention, the component A may further include a Mannich base quaternary ammonium salt. The compounding of Mannich base quaternary ammonium salt and quinoline quaternary ammonium salt can slow down the corrosion rate of metal in acid solution and improve the corrosion inhibition effect of corrosion inhibitor. The mass ratio of the Mannich base quaternary ammonium salt to the quinoline quaternary ammonium salt can be controlled to be 25-50:5-10, for example, 30-45:5-10.

According to some specific embodiments of the present invention, based on the mass of the aldosterone amine condensate as 100%, the aldosterone amine condensate includes a mass ratio of more than 60% of formula (I) or formula (II) polymer shown;

Among them, R1 is a hydrocarbon group, X is a halogen, and the viscosity average molecular weight of the polymer is 1000 or less.

According to some specific embodiments of the present invention, formula (II) is the quaternized product of the polymer represented by formula (I), R1 is -CH ₂ CH=CH ₂ , X is chlorine or bromine; and formula (I) Compared with the polymer shown, the compound represented by the formula (II) after quaternization has lower molecular energy, is more stable, and is more favorable for stable adsorption with the metal surface at high temperature.

After the nitrogen and oxygen atoms without shared electron pairs contained in the aldosterone amine condensate molecule of the present invention are converted into onium ions, positively charged cations are formed in the acid. When these cations are in contact with the metal surface, electrostatic attraction and van der Waals Force adsorption forms a monomolecular adsorption film at the position where there is excess on the metal surface, so that it is difficult for H ⁺ ions to approach the metal surface, and the process of H ⁺ ions on the metal surface to obtain electron cathode is inhibited. There are nitrogen and oxygen atoms that do not share electron pairs in the molecule, and a benzene ring containing a π bond, so it can form an adsorption film with iron atoms on the metal surface through coordination bonds. Moreover, there are two non-coordinating atoms between oxygen and nitrogen, so the corrosion inhibitor molecule is a chelating ligand. The lone pair of its coordinating atoms enters the dsp orbital of iron atom hybridization, forming coordination bonds, and complexation occurs to form a stable chelate with a six-membered ring structure. The chelate can be adsorbed on On the metal surface, a dense and stable hydrophobic protective film is formed, which effectively prevents the anodic process of the corrosion reaction in which the corrosion product iron ions diffuse into the solution, and the cathodic process of the corrosion reaction in which the hydrogen ions in the solution migrate to the metal through the covering effect.

According to some specific embodiments of the present invention, the aldosterone amine condensate can be obtained by reacting aldehyde compounds, ketone compounds and amine compounds. Specifically, an intermediate product can be formed by reacting an aldehyde compound and a ketone compound first, and then the intermediate product is mixed and reacted with an amine compound to obtain an aldosterone amine condensate. The temperature of the reaction is generally controlled to be 95-115°C, and the time of the reaction is generally controlled to be 240 min. The aldehyde compound may include formaldehyde and the like, the ketone compound may include cyclohexanone and the like, and the amine compound may include aniline and the like.

In some specific embodiments, the preparation method of the above-mentioned aldosterone amine condensate can be as follows: in parts by weight, 510 parts of formaldehyde, 600 parts of cyclohexanone, and 65 parts of hydrochloric acid are mixed, kept at a constant temperature of 95° C. for 1.5 hours, and then allowed to stand. Separation to obtain an intermediate product, 750 parts of the intermediate product, 300 parts of aniline and 35 parts of hydrochloric acid were mixed, and the temperature was kept at 115° C. for 1.5 h to obtain an aldosterone amine condensate.

According to some specific embodiments of the present invention, the quaternary ammonium salt of quinoline is a chloride-1-benzylquinoline salt obtained by the reaction of benzyl chloride and quinoline.

The cations of the above-mentioned quinoline quaternary ammonium salts can be physically adsorbed in the cathode region of the metal surface, which can effectively prevent H ⁺ ions from approaching the metal surface, thereby inhibiting the reduction reaction of H ⁺ and inhibiting the cathode reaction. In addition, quinoline quaternary ammonium salts contain N elements that do not share electron pairs. These elements can coordinately combine with the metal surface to form a firm chemical adsorption layer, which can improve the activation energy of the anodic reaction of steel in corrosive media, thereby reducing the anodic effect. corrosion rate. The halogen in the quaternary ammonium salt has a certain synergistic effect on the corrosion inhibition of iron, and promotes the adsorption of organic cations on the metal surface to form a stable protective film. The diffusion of the product iron ions into the solution and the migration of the hydrogen ions in the solution into the metal corrosion reaction process. In addition, the quinoline quaternary ammonium salt contains a condensed ring structure, and the condensed ring has a larger total electron delocalization energy, which can enhance its coordination with metal atoms, so the adsorption film formed on the metal surface is stronger.

According to some specific embodiments of the present invention, the organic acid is selected from formic acid or acetic acid.

According to some specific embodiments of the present invention, the alkynyl alcohol derivative is selected from the group consisting of propargyl alcohol propoxy compounds (formula IV) or propargyl alcohol ethoxy compounds (formula V);

Among the above-mentioned alkynyl alcohol derivatives, the reason why propargyl alcohol derivatives are selected instead of propargyl alcohol is that because propargyl alcohol is a highly toxic substance, it is a controlled drug, and its derivatives are low-toxic substances, which satisfies environmental protection. Require.

According to some specific embodiments of the present invention, the organic synergist is selected from one or a combination of two or more of fatty amines, amides and alcohol amines.

According to some specific embodiments of the present invention, the organic synergist is selected from one or a combination of two of formamide and N,N-dimethylformamide.

According to some specific embodiments of the present invention, the alcohol solvent is selected from any one of ethanol, isobutanol and ethylene glycol.

According to some specific embodiments of the present invention, the dispersing agent is selected from one or a combination of two of alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.

According to some specific embodiments of the present invention, the alkylphenol polyoxyethylene ether is selected from one or a combination of two of OP-10 and NP-10, and the fatty alcohol polyoxyethylene ether is selected from OS-15 and one or a combination of both OS-20.

According to some specific embodiments of the present invention, the corrosion inhibitor for acidification further includes component B, and the component B is selected from cuprous chloride, potassium iodide, potassium pyroantimonate, antimony trioxide and sodium molybdate one or a combination of two or more. Preferably, the mass ratio of the component A and the component B is (4.0-5.0):(0.5-1.5).

Alkynyl alcohol derivatives and organic synergists can fill the adsorption void area of aldosterone amine condensate and quinoline quaternary ammonium salt macromolecule corrosion inhibitor. Propynyl alcohol derivatives have relatively longer molecular chains than propynyl alcohol and contain unshared electrons. The oxygen atoms can be adsorbed on the metal surface to form a film, and it has a certain hydrophobic property to form a hydrophobic protective film. The addition of inorganic synergist (ie component B) can make the temperature resistance of the corrosion inhibitor reach 200°C.

According to some specific embodiments of the present invention, the preparation method of component A may include the following steps: heating the aldosterone amine condensate to 40-50° C., and then heating the organic acid, alkynol derivative, organic synergist A solvent, an alcohol solvent, a dispersant, and the aldehyde-ketone condensate are mixed uniformly to obtain the component A.

According to some specific embodiments of the present invention, when the component A contains a quinoline quaternary ammonium salt, the preparation method of the component A may include the following steps: heating the aldolamine condensate to 40-50° C., Then, the quinoline quaternary ammonium salt, organic acid, alkynyl alcohol derivative, organic synergist, alcohol solvent, dispersant and the aldehyde-ketone condensate are uniformly mixed to obtain the component A. Further, when the component A further contains a Mannich base quaternary ammonium salt, the Mannich base quaternary ammonium salt and the quinoline corrosion inhibitor can be added at the same time.

On the other hand, the present invention also provides the application of the above-mentioned corrosion inhibitor for acidification in deep oil and gas reservoirs.

According to some specific embodiments of the present invention, the application includes the following steps: directly adding component A into hydrochloric acid with a concentration of 31% or more, adding component B after dissolving and dispersing, stirring evenly, and after component B is completely dissolved Dilute the acid to the desired concentration.

Beneficial effects of the present invention:

The corrosion inhibitor for acidification provided in the embodiment of the present invention can be applied to high temperatures of 200° C. and below, and the mass concentration of the corrosion inhibitor for acidification in HCl is 15%-25% concentrated hydrochloric acid (the acid concentration in the following refers to the concentration of HCl). It has good dispersibility in mass percentage), and the corrosion rate meets the first-class index requirements of the oil and gas industry. The application of the corrosion inhibitor for acidizing can reduce the corrosion risk of downhole pipe strings in the process of acidizing and reforming ultra-deep and ultra-high temperature carbonate rocks.

Description of drawings

Figure 1 shows the corrosion rate of the corrosion inhibitor of the present invention at 90-140°C.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solutions of the present invention are now described in detail below, but should not be construed as limiting the scope of implementation of the present invention.

The chloride-1-benzylquinoline salt in the following examples was purchased from Chengdu Forest Technology Development Co., Ltd.

The aldosterone amine condensate used in the following examples is the acidification corrosion inhibitor aldosterone amine condensate CT1-3D, the thickener is the acidification gelling agent cationic polyacrylamide CT1-9B, and the iron ion stabilizer is the acidification iron The ion stabilizer organic acid salt CT1-7, the clay stabilizer is the clay stabilizer polyquaternary ammonium salt CT5-8 for oil and gas wells, and the drainage aid is the fluorocarbon CT5-12A, the drainage aid for fracturing and acidizing. The above reagents are all Produced by Chengdu Dute Technology Development Co., Ltd.

Example 1

This embodiment provides a corrosion inhibitor for acidification, and the corrosion inhibitor for acidification includes component A and component B.

Wherein, component A is prepared by the following method:

In parts by weight, add 30 parts of aldosterone amine condensate to the reaction kettle, and heat the aldosterone amine condensate to 40-50 ° C, then add 5 parts of chlorinated 1-benzyl quinoline salt in turn under stirring , 10 parts of propargyl alcohol propoxy compound, 17 parts of formic acid, 19 parts of formamide, 9 parts of ethylene glycol, and 10 parts of O-20, and after stirring evenly, the component A of this embodiment is obtained, which is recorded as formula 1.

Component B in this embodiment is potassium pyroantimonate, and the mass ratio of component A to component B is 5.0:1.5.

Example 2

In parts by weight, 35 parts of aldosterone amine condensate was added to the reaction kettle, and the aldosterone amine condensate was heated to 40-50 ° C, and then 10 parts of propargyl alcohol propoxy compound, 17 parts of propargyl alcohol propoxy compound, 17 Parts of formic acid, 19 parts of formamide, 9 parts of ethylene glycol, and 10 parts of O-20 are mixed to obtain component A of this embodiment, which is designated as formula 2.

Example 3

Wherein, component A is prepared by the following method:

In parts by weight, add 30 parts of aldosterone amine condensate to the reaction kettle, and heat the aldosterone amine condensate to 40-50 ° C, then add 5 parts of chlorinated 1-benzyl quinoline salt in turn under stirring , 10 parts of propargyl alcohol ethoxylate, 17 parts of acetic acid, 19 parts of N,N-dimethylformamide, 9 parts of ethanol, and 10 parts of O-20, and stir to obtain component A of this embodiment, Record it as Recipe 3.

Component B in this embodiment is sodium molybdate, and the mass ratio of component A to component B is 5.0:1.5.

Example 4

Wherein, component A is prepared by the following method:

In parts by weight, 35 parts of aldosterone amine condensate was added to the reaction kettle, and the aldosterone amine condensate was heated to 40-50 ° C, and then 10 parts of propynyl alcohol ethoxylate, 17 parts of propargyl alcohol ethoxylate, 17 parts of acetic acid, 19 parts of N,N-dimethylformamide, 9 parts of ethanol, and 10 parts of O-20, and after stirring evenly, the component A of this embodiment is obtained, which is designated as formula 4.

Example 5

In this example, the composite corrosion inhibitor prepared in Example 1, Example 2, Example 3 and Example 4 was tested for corrosion inhibition performance in acid solution. The standard "SY/T5405-1996" is carried out, and the specific results are as follows.

The specific evaluation methods are:

To the hydrochloric acid with a mass concentration of 15%, the corrosion inhibitors for acidification provided in the above Examples 1-4 were respectively added, and a standard BG110SS test piece was used to carry out corrosion performance evaluation.

1. 15% hydrochloric acid corrosion evaluation

500 mL of an acid solution with a concentration of 15% wt of hydrochloric acid, 5% wt of corrosion inhibitor component A, and 1.5% wt of corrosion inhibitor component B was prepared indoors.

Acid solution preparation: Measure 210 mL of industrial hydrochloric acid with a mass percentage of 31%, add 25.0 g of component A of the corrosion inhibitor and 7.5 g of component B of the corrosion inhibitor, stir evenly, and make up to 500 mL with tap water, and stir evenly.

The coupons are made of BG110SS steel, and the coupons are prepared according to the standard requirements, and the weighing records are made.

Acid corrosion rate: According to "SY-T 5405 Corrosion Inhibitor Performance Test Method and Evaluation Guide for Acidizing" in the high temperature and high pressure dynamic corrosion test system, the corrosion rate test at 200 ℃ was carried out. The results are shown in Table 1.

It can be seen from Table 1 that the corrosion rate at a temperature of 200 °C meets the requirements of the first-class index in the oil and gas industry, and the test piece has no pitting and pitting corrosion after corrosion.

Table 1

Note: Formula 1-Formula 4 in Table 1 refer to the formula of component A corresponding to Example 1-Example 4.

2. 20% hydrochloric acid corrosion evaluation

500 mL of an acid solution with a concentration of 20% wt of hydrochloric acid, 5% wt of corrosion inhibitor component A, and 1.5% wt of corrosion inhibitor component B was prepared indoors.

Acid solution preparation: Measure 280 mL of industrial hydrochloric acid with a mass percentage of 31%, add 25.0 g of corrosion inhibitor component A and 7.5 g of corrosion inhibitor component B, stir evenly, and use tap water to make up to 500 mL, and stir evenly.

Acid corrosion rate: In accordance with "SY-T 5405 Performance Test Method and Evaluation Index of Corrosion Inhibitor for Acidizing", the corrosion rate test at 200 ℃ was carried out in the high temperature and high pressure dynamic corrosion test system. The results are shown in Table 2.

It can be seen from Table 2 that the corrosion rate of 20% hydrochloric acid concentration at 200°C meets the requirements of the first-class index of the oil and gas industry, and the test piece has no pitting and pitting corrosion after corrosion.

Table 2

Note: Formula 1-Formula 4 in Table 2 refer to the formula of component A corresponding to Example 1-Example 4.

3. Corrosion evaluation of 15% hydrochloric acid acid system

Indoor preparation of 500mL hydrochloric acid concentration of 15%wt, corrosion inhibitor component A is 5%wt, corrosion inhibitor component B is 1.5%wt, thickener is 0.05%wt, iron ion stabilizer is 2%wt, The clay stabilizer is 1%wt, and the drainage aid is an acid liquid system of 1%wt.

Acid solution preparation: Measure 210mL of industrial hydrochloric acid with a mass percentage of 31%, add 25.0g of Component A of the corrosion inhibitor and 7.5g of Component B of the corrosion inhibitor, and then add the thickener, Iron ion stabilizer, clay stabilizer and drainage aid, stir evenly, make up to 500mL with tap water, and stir evenly.

Acid corrosion rate: In accordance with "SY-T 5405 Performance Test Method and Evaluation Index of Corrosion Inhibitor for Acidizing", the corrosion rate test at 200 ℃ was carried out in the high temperature and high pressure dynamic corrosion test system. The results are shown in Table 3.

It can be seen from Table 3 that the corrosion rate of the 15% hydrochloric acid acid system at a temperature of 200 °C is slightly increased, but it can still meet the requirements of the first-class indicators in the oil and gas industry, and the test piece has no pitting and pitting corrosion after corrosion.

table 3

Note: Formula 1-Formula 4 in Table 3 refer to the formula of component A corresponding to Example 1-Example 4.

Example 6

This example provides a comparative test of the solubility of Mannich base quaternary ammonium salt corrosion inhibitor and quinoline quaternary ammonium salt corrosion inhibitor in acid. details as follows:

Test Mannich base quaternary ammonium salt corrosion inhibitor (the ingredient is Mannich base quaternary ammonium salt, the manufacturer is Chengdu Dute Technology Development Co., Ltd.) and quinoline quaternary ammonium salt corrosion inhibitor (the ingredient is quinoline quaternary ammonium salt, Specifically, the solubility of chloride-1-benzyl quinoline salt) in acid. Adding a certain amount of auxiliary agent when the two main agents are compounded helps to accurately evaluate the corrosion inhibition efficiency of the corrosion inhibitor. In this example, The adjuvants used were isopropanol, methyl oleate and O-20 surfactant in a mass ratio of 20:7.5:5. According to the actual functional characteristics of Mannich base quaternary ammonium salt corrosion inhibitor and quinoline quaternary ammonium salt corrosion inhibitor, the main compound is mainly Mannich base quaternary ammonium salt corrosion inhibitor, and the designed dosage is 25%, 30%, 45%, 50%, compound quinoline quaternary ammonium salt, the designed dosage is 5%, 6%, 8%, 10%. Orthogonal experimental design was used to optimize the ratio of the two main agents. After compounding, the dosage of corrosion inhibitor was 5%, the dosage of synergist was 1.5%, 15% HCl, and the balance was water. Evaluation standard BG110SS test piece corrosion rate. The orthogonal experiment results are shown in Table 4.

Table 4

It can be seen from the experimental results that the addition of Mannich base quaternary ammonium salt in the range of 30-45% can achieve a better corrosion inhibition effect, but the corrosion inhibition effect is reduced when the amount is increased.

Table 5 shows the evaluation results of the corrosion inhibition effect after the Mannich base is compounded with other types of corrosion inhibitors. The main agent dosage of Mannich base quaternary ammonium salt is set to 40%, the dosage of other types of corrosion inhibitors is set to 5%, the main agent dosage is 40%, and the auxiliary agent is isopropyl with a mass ratio of 20:7.5:5 Alcohol, Methyl Oleate and O-20 Surfactant.

table 5

From the evaluation results of Mannich base quaternary ammonium salt and other types of corrosion inhibitors, it can be seen that only quinoline quaternary ammonium salt and its compound have better corrosion inhibition effect under the high temperature condition of 200℃.

Example 7

In the present invention, the temperature resistance performance test of the main agent of the quinoline quaternary ammonium salt corrosion inhibitor is also carried out, the corrosion rate of the synthetic quinoline quaternary ammonium salt corrosion inhibitor at 90-140 ℃ is tested, and the corrosion inhibition performance of the corrosion inhibitor is compared with the temperature The test results are shown in Table 6.

Table 6

It can be seen from this table and Figure 1 that in the range of 90°C-140°C, with the increase of temperature, the corrosion inhibition performance of quaternary ammonium salt corrosion inhibitor presents a relatively obvious downward trend.

Claims

A corrosion inhibitor for acidification suitable for use at 200° C., wherein the corrosion inhibitor for acidification includes component A, wherein, in parts by weight, the component A includes the following components: aldolamine condensate: 30-45 parts; organic acid: 1-17 parts; alkynol derivatives: 3-10 parts; organic synergist: 15-40 parts; alcohol solvent: 5-15 parts; dispersant: 5 servings - 15 servings.
The corrosion inhibitor for acidification according to claim 1, wherein, in parts by weight, the component A comprises the following components: aldolamine condensate: 30 parts-45 parts; quinoline quaternary ammonium salt: 5 parts -8 parts; organic acid: 1 part-17 parts; alkynyl alcohol derivative: 3 parts-10 parts; organic synergist: 15 parts-40 parts; alcohol solvent: 5 parts-15 parts; dispersant: 5 parts- 15 parts, wherein, the quinoline quaternary ammonium salt is made of one or more combinations of benzyl chloride, benzyl methanol, benzyl propanol and cetyl dimethyl benzyl ammonium chloride and quinoline. Synthesized by quaternization reaction.
The corrosion inhibitor for acidification according to claim 1 or 2, wherein, by weight percentage, the component A comprises the following components: aldolamine condensate: 30%-45%; quinoline quaternary ammonium salt: 5%-8%; organic acid: 1%-10%; alkynyl alcohol derivative: 3%-10%; organic synergist: 15%-40%; alcohol solvent: 5%-15%; dispersant: 5 %-15%; the balance is water;

Wherein, the quaternary ammonium salt of quinoline is a combination of one or more of benzyl chloride, benzyl methanol, benzyl propanol and cetyl dimethyl benzyl ammonium chloride and quinoline through quaternization Reactive synthesis.
The corrosion inhibitor for acidification according to claim 2 or 3, wherein the component A further comprises a Mannich base quaternary ammonium salt, and the mass ratio of the Mannich base quaternary ammonium salt to the quinoline quaternary ammonium salt 25-50: 5-10.
The corrosion inhibitor for acidification according to any one of claims 1-4, wherein, based on the mass of the aldosterone amine condensate as 100%, the aldosterone amine condensate includes a mass ratio of more than 60% The polymer of formula (I) or formula (II);

Among them, R1 is a hydrocarbon group, X is a halogen, and the viscosity average molecular weight of the polymer is 1000 or less.
The corrosion inhibitor for acidification according to claim 5, wherein the formula (II) is a quaternized product of the polymer represented by the formula (I), R1 is -CH 2 CH=CH 2 , and X is chlorine or bromine.
The corrosion inhibitor for acidification according to any one of claims 2-4, wherein the quinoline quaternary ammonium salt is a chloride-1-benzyl quinoline salt obtained by the reaction of benzyl chloride and quinoline.
The corrosion inhibitor for acidification according to any one of claims 1-4, wherein the organic acid is selected from formic acid or acetic acid.
The corrosion inhibitor for acidification according to any one of claims 1 to 4, wherein the alkynyl alcohol derivative is selected from a propargyl alcohol propoxy compound or a propargyl alcohol ethoxy compound.
The corrosion inhibitor for acidification according to any one of claims 1-9, wherein the organic synergist is selected from one or a combination of two or more of fatty amines, amides and alcohol amines.
The corrosion inhibitor for acidification according to any one of claims 1-4 or 10, wherein the organic synergist is selected from one or both of formamide and N,N-dimethylformamide combination.
The corrosion inhibitor for acidification according to any one of claims 1-4, wherein the alcohol solvent is selected from any one of ethanol, isobutanol and ethylene glycol.
The corrosion inhibitor for acidification according to any one of claims 1 to 4, wherein the dispersant is selected from one or a combination of two of alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.
The corrosion inhibitor for acidification according to claim 13, wherein the alkylphenol polyoxyethylene ether is selected from one or a combination of OP-10 and NP-10, the fatty alcohol polyoxyethylene The ether is selected from one or a combination of OS-15 and OS-20.
The corrosion inhibitor for acidification according to any one of claims 1-14, wherein the corrosion inhibitor for acidification further comprises component B, and the component B is selected from cuprous chloride, potassium iodide, pyroantimonic acid One or a combination of two or more of potassium, antimony trioxide and sodium molybdate.
The corrosion inhibitor for acidification according to claim 15, wherein the ratio of the component A and the component B is (4.0-5.0):(0.5-1.5).
The corrosion inhibitor for acidification according to claim 1, wherein, the preparation method of component A comprises the steps:

The aldosterone amine condensate is heated to 40-50° C., and then the organic acid, alkynol derivative, organic synergist, alcohol solvent and dispersant are uniformly mixed with the aldehyde ketone condensate to obtain the Component A.
Application of the corrosion inhibitor for acidizing according to any one of claims 1-17 in deep oil and gas reservoirs.
The application of claim 18, comprising the steps of:

Add component A directly into hydrochloric acid, dissolve and disperse, then add component B, and stir evenly.