Analysis of corrosion perforation of a gas gathering carbon steel pipeline in a western oilfield in China

DOI

10.2991/imst-16.2016.13How to use a DOI?

Keywords

corrosion perforation; scaling; failure analysis; pipeline; carbon dioxide.

Abstract

In the west of China, corrosion perforation and scaling of pipelines occur frequently in the ground gathering system in oil and gas field, and cause serious safety and environmental problems. In the present work, the corrosion perforation of a carbon steel pipeline with a grade of 20 in a western oil field in China was investigated. Optical metallographic microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction were used to determine the most probable causes of the corrosion perforation. The results showed that the internal corrosion of the studied carbon steel pipe was ascribed to the corrosive CO2 gas and the high content of formation water in the internal transporting medium. The formation of loose and porous iron carbonate layer and the scaling layer with poor adhesion could not protect the carbon steel effectively, so that the high concentration of chloride ions in the formation water caused the initiation of localized corrosion possibly by changing the solubility of iron carbonate, and then the localized corrosion pit propagated and eventually caused the perforation.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Juntao Yuan
AU  - Huihui Zhang
AU  - Ke Tong
AU  - Fagen Li
AU  - Yan Long
AU  - Lei Li
PY  - 2016/11
DA  - 2016/11
TI  - Analysis of corrosion perforation of a gas gathering carbon steel pipeline in a western oilfield in China
BT  - Proceedings of the 2016 International Conference on Innovative Material Science and Technology (IMST 2016)
PB  - Atlantis Press
SP  - 94
EP  - 101
SN  - 1951-6851
UR  - https://doi.org/10.2991/imst-16.2016.13
DO  - 10.2991/imst-16.2016.13
ID  - Yuan2016/11
ER  -