Cinnamaldehyde: Preparation of a New Type of Oil Acidizing Corrosion Inhibitor

Acidification is commonly used in oilfields to increase production and increase injection. It mainly uses the chemical dissolution and hydraulic action of the acid to expand the oil flow channel and increase the permeability of the formation so as to achieve the purpose of increasing production and increasing injection. Generally, the oil wells use mass fractions of 15 to 15 A 28% ** solution injection well will cause severe corrosion to the surface manifold and the wellbore wall, and the inclusion of Fe+ into the human formation will cause permanent damage to the formation, so corrosion inhibitors must be added to the acid.

In recent years, great progress has been made in this research field at home and abroad, and a series of new acid corrosion inhibitors have been developed. Nitrogenous compounds have been reported as corrosion inhibitors in acids. Nitrogen atoms are the most common heteroatoms in organic corrosion inhibitors. Nitrogen-containing organic compounds are the basic components of the acidification corrosion inhibitors for oil and gas wells. Among them, Mannich Mannich base corrosion inhibitors have attracted wide attention due to their excellent performance.

The scholars of the School of Chemistry and Materials Science, Liaoning University of Petroleum and Chemical Technology, used acetophenone, cinnamaldehyde, and aniline as raw materials to synthesize a novel Mannich base corrosion inhibitor with different amounts of substances, under high temperature and high acidity conditions. The corrosion inhibition effect was evaluated by the weight loss method of the hanging piece. The study found that the amount of cinnamaldehyde had a significant effect on the sustained release performance of the Mannich base corrosion inhibitor, followed by the effect of acetophenone, and the amount of aniline had the least influence. When the ratio of aniline:acetophenone:cinnamaldehyde was 2:2:1.5, the inhibitor had the best corrosion inhibition performance. When the amount of corrosion inhibitor added is 0.5%, 15% by weight is added, and when the temperature is 60 to 100 degrees, the corrosion inhibition effect is the best from the economical point of view. According to the “Test Method and Evaluation Index for the Performance of Acidizing Inhibitor,” the corrosion rate can reach the first-grade standard (corrosion rate = 2 to 3 g/mh. In addition, cinnamaldehyde is non-toxic and will not cause harm to the human body. It is a More environmentally friendly chemical reagents.