Control of the corrosion in sewage systems for Bohai oilfield

Abstract

According to the analysis of the corrosion products from the Bohai oilfield sewage system,the main causes of corrosion were the high concentration of ferric ion and amide chemicals in the sewage. Among those causes, the under-deposit corrosion caused by a large amount of iron scale was the most important cause of corrosion and the key point of pitting corrosion. Based on the above situation, the corrosion of the oilfield was well controlled by continuously by adding highly efficient Fe ion stabilizer and highly efficient descaler while control of the return liquid.

Keywords

• oilfield sewage system
• ferric ion
• under-deposit corrosion