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- Title
Corrosion investigation of J55 steel under simulated enhanced oil recovery conditions using CO<sub>2</sub> flooding.
- Authors
Wang, X. Z.; Yang, Z. G.; Yin, Z. F.; Gao, Z. Q.; Li, J. D.; Wang, K.
- Abstract
The present work investigated corrosion behaviour of J55 tubing steels and solution equilibrium chemistry of the produced water under simulated CO2 flooding environments at various temperatures. The corrosion rates were calculated by weight loss method carried out with or without one kind of imidazoline based inhibitor in autoclave. Surface morphologies of corrosion product films formed on samples were analysed using scanning electron microscopy (SEM). Meanwhile, the concentrations of main solution species in experimental produced water were tested. The solution equilibrium chemistry of dissolved CO2 in the produced water was also calculated and analysed. The results indicated that corrosion rate of J55 significantly increased when temperature exceeded 55°C and greatly decreased with the effect of inhibitor especially when the imidazoline based inhibitor exceeds 150 ppm, σ Fe concentration increased with the increase in temperature, especially when temperature exceeded 44°C. The H2CO3 concentration declines by about 3 orders of magnitude compared to CO2(aq) concentration and the yielded HCO3− concentration is about 0·2-0·35 times of the H2CO3 concentration.
- Subjects
CORROSION &; anti-corrosives; CHEMICAL inhibitors; ENHANCED oil recovery; PRODUCTION methods in oil fields; CARBON dioxide flooding
- Publication
Corrosion Engineering, Science & Technology, 2014, Vol 49, Issue 4, p275
- ISSN
1478-422X
- Publication type
Article
- DOI
10.1179/1743278213Y.0000000132