Abstract
Water injection, air injection, air foam injection, and in-situ combustion technology are used step by step in the later period of oilfield. Oxygen corrosion caused by different development methods has become a problem that could not be ignored. In this paper, the mechanism of oxygen corrosion, the influencing factors of oxygen corrosion and the new progress of oxygen corrosion countermeasures in recent years are systematically analyzed. Anticorrosion methods for different development modes are put forward. The direction of further research on oxygen corrosion in oilfield development is proposed: ○1Prediction and control of corrosion in oxygen environment need to be further studied to better guide corrosion protection in high temperature injection and production of oil and gas wells. ○2The research of anticorrosive coating materials and corrosion inhibitor technology needs to be further developed in the direction of safety and environment-friendly.
Highlights
Water injection, air injection, air foam injection, and in-situ combustion technology are used step by step in the later period of oilfield
In the process of air injection, air foam injection and in-situ combustion, high temperature and high pressure oxygen corrosion environment will be formed in oil and gas wells
The results show that the uniform corrosion rate of the above five steel sheets under different conditions of in-situ combustion or air injection is all less than 0.2mm/a, and they all have good corrosion resistance [6, 25, 26]
Summary
Air injection, air foam injection, and in-situ combustion technology are used step by step in the later period of oilfield. Oxygen corrosion caused by different development methods has become a problem that could not be ignored. In the process of water injection, the change of dissolved oxygen content in water quality will cause serious corrosion. In the process of air injection, air foam injection and in-situ combustion, high temperature and high pressure oxygen corrosion environment will be formed in oil and gas wells. Experts and scholars at home and abroad mostly study the corrosion of H2S/CO2 in the process of oilfield development, few studies have been done on the influencing factors of oxygen corrosion and its control measures. It is necessary to study the influencing factors of oxygen corrosion in the process of oilfield development and put forward corresponding protective measures
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