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Field Study of Corrosion Inhibition Effect on Corrosion of Low Flow Velocity Gas Flowlinesunder CO2 Environments

Picture for Field Study of Corrosion Inhibition Effect on Corrosion of Low Flow Velocity Gas Flowlines under CO2 Environments
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Carbon Dioxide (CO2) corrosion of carbon steel (sweet gas corrosion) poses a serious problem in oil and gas production, since most used materials are low alloyed carbon steels, which are not corrosion resistant. Basically, the main aspects of CO2 corrosion are well known today, and the parameters are temperature, CO2 partial pressure, pH value, and flow velocity [1-2]. CO2 dissolves in brine to form an acidic solution that corrodes carbon steel equipment.

Product Number: MECC23-20102-SG
Author: Muhammad Sohaib Khan; Mohammed S. Alqahtani
Publication Date: 2023
$20.00
$20.00
$20.00

The effect of flow velocity on corrosion inhibition of low carbon steel gas flowlines was investigated utilizing: corrosion inhibitor injection rates, OLGA1 transient simulation model for water presence identification, historical operational data and in line inspection (ILI) data. The gas flowlines included in the study shared a common condition of producing operations at variable flow velocities below 10 ft/s and continuous chemical treatment in a CO2 environment.


The study concluded that CO2 corrosion was effectively mitigated at low flow velocities even at different operating temperature/pressure, variable amount of produced water and different CO2 partial pressure by ensuring that enough corrosion inhibitor was injected, provided there were no operational upset conditions.

The effect of flow velocity on corrosion inhibition of low carbon steel gas flowlines was investigated utilizing: corrosion inhibitor injection rates, OLGA1 transient simulation model for water presence identification, historical operational data and in line inspection (ILI) data. The gas flowlines included in the study shared a common condition of producing operations at variable flow velocities below 10 ft/s and continuous chemical treatment in a CO2 environment.


The study concluded that CO2 corrosion was effectively mitigated at low flow velocities even at different operating temperature/pressure, variable amount of produced water and different CO2 partial pressure by ensuring that enough corrosion inhibitor was injected, provided there were no operational upset conditions.

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