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| Corrosion Rule of N80 Carbon Steel during Air Injection Enhanced Oil Recovery |
| Received:September 30, 2021 Revised:November 07, 2021 |
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| DOI：10.7643/issn.1672-9242.2022.03.017 |
| KeyWord:corrosion air injection N80 carbon steel |
| Author | Institution |
| LIAN Yu-bo |
Xi'an Changqing Chemical Group Co., Ltd., Xi'an , China |
| WENG Hua-tao |
Xi'an Changqing Chemical Group Co., Ltd., Xi'an , China |
| LIU Gui-bin |
Xi'an Changqing Chemical Group Co., Ltd., Xi'an , China |
| WEI Ya-jun |
Xi'an Changqing Chemical Group Co., Ltd., Xi'an , China |
| HUANG Chen |
Xi'an Changqing Chemical Group Co., Ltd., Xi'an , China |
| JIANG Wei |
Xi'an Changqing Chemical Group Co., Ltd., Xi'an , China |
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| Abstract: |
| This study was carried out to investigate the corrosion rule of carbon steel during air injection Enhanced Oil Recovery (EOR) process and provide data support for the corrosion protection of carbon steel under the condition of air injection EOR. Corrosion rate of N80 carbon steel was evaluated by weight-loss coupon method under high temperature and high pressure. The morphology and composition of corrosion product film on metal surface were investigated by means of SEM, EDS. The effects of oxygen partial pressure, temperature and corrosion time on the corrosion of N80 carbon steel during air injection EOR. The results indicated that the corrosion rate of N80 carbon steel generally increased along with increasing the oxygen partial pressure. With the increase of temperature, the corrosion rate of N80 carbon steel increases obviously. When the temperature is 100 ℃, the corrosion rate reaches 13.65 mm/a; With the extension of corrosion time, the corrosion rate of N80 carbon steel increases first and then decreases, and the corrosion rate is the highest at 24 h, which is 17.41 mm/a. N80 carbon steel suffered severe corrosion during air injection EOR process and the corrosion products were mainly iron oxide. |
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