Acid reservoir good partner, corrosion inhibitor for acidification

Corrosion inhibitor for acidification is mainly used in oil fields containing high sulfur, high acid, high temperature and other conditions, and is widely used in the international oil production industry. Its main working principle is to prevent or reduce metal corrosion by changing the potential of the metal surface to form a layer of corrosion inhibition film.

The oil fields that are widely used in the world are:

1. Acidic reservoirs in the Middle East, such as Iran’s Azadegan oil field and Kuwait’s Burgan oil field.

2. Acidic reservoirs in the United States, such as Eagle Hole oil field in Texas and San Andres oil field in New Mexico.

3. Acidic reservoirs in Brazil, such as the Pre-Salt field in Sao Paulo State and the Piranema field in Pernambuco State.

4. Acidic reservoirs in Russia, such as the Old Territory oilfield in Siberia, Tumen Saba oilfield, etc.

5. Acidic reservoirs in Algeria, such as Hatan Field, Amguid field, etc.

Among them, the Eagle Hole oilfield in Texas is one of the earliest and most successful cases of the application of corrosion inhibitors for acidification. The crude oil in the field contains high levels of H2S and CO2, which makes the steel corroded and eroded throughout the year. In 1968, Exxon successfully solved the corrosion problem of the field by using corrosion inhibitors for acidification such as EDTA and buffer acid, which laid the foundation for the application of corrosion inhibitors for acidification in the future.

In addition, acidification may be required during oil production if the following conditions are encountered: insufficient reservoir pressure, blockage in the reservoir, embrittlement of the reservoir, and blockage of the well string. The use of acidizing technology, naturally, it is necessary to use acidizing corrosion inhibitors to protect the working environment to prevent corrosion.

The main working principle of corrosion inhibitors for acidification is to prevent or reduce metal corrosion by changing the potential of the metal surface to form a layer of corrosion inhibition film.

Specifically, the corrosion inhibitor for acidification is usually an acidic substance that can react with oxides, ferrites, and other substances on the surface of the metal to convert them into dissolved compounds. In this way, corrosion inhibitors for acidification can remove oxides and corrosion products from the metal surface, leaving the metal surface exposed.

Corrosion inhibitors for acidification can also form a layer of organic acid salts, chelates or complexes by forming a chemical bond with the metal surface. This film can block the contact of oxygen and water, thereby reducing the electrochemical reaction on the metal surface and reducing the incidence of corrosion. In addition, corrosion inhibitors for acidification can also generate a relatively stable oxide film on the surface of the metal, which plays a role in protecting the metal.

Corrosion inhibitors for acidification are usually used in combination with other corrosion inhibitors and anti-corrosion interface active agents to improve the corrosion inhibition effect. In addition, the choice of corrosion inhibitor for acidification should also be adjusted according to the specific working conditions, such as the temperature, salinity, PH value of the oilfield, in order to obtain the best corrosion inhibition effect.

In general, corrosion inhibitors for acidification prevent or reduce metal corrosion by removing oxides and corrosion products from metal surfaces and forming corrosion inhibition films, thereby protecting the integrity and reliability of equipment and pipes. In the international oil production industry, corrosion inhibitors for acidification are widely used in various oil fields and production processes to improve equipment service life and production efficiency.
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