Abstract

Oilfields generate less gas pressure as they mature. As a result, ingress of oxygen into well annuli, into the vapor space in tanks, and through pump packing becomes more common. 1 Consequently, it is possible for severe localized corrosion to occur on carbon steel metals. Unfortunately, there are very few options to control very high corrosion rates that arise due to oxygen ingress. Common corrosion inhibitors generally fail to protect carbon steel when oxygen is present. In this paper, we report the performance of a novel phosphate ester-based inhibitor, which is capable of protecting carbon steel from carbonic acid corrosion in the presence of oxygen.

Keywords:
oxygen, well integrity, phosphate ester, inhibitor, riser corrosion, gas mixture, permission, experiment, mpy, deposit
Subjects:
Pipelines, Flowlines and Risers, Materials and corrosion, Well Integrity, Subsurface corrosion (tubing, casing, completion equipment, conductor)
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2015. NACE International
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