Since some years back a new class of Oilfield corrosion inhibitors have been available on the market, oligomeric film-forming inhibitors. In contrast to the standard cationic surfactant type, these chemistries contain multiple positively charged hydrophilic headgroups. These amine- based inhibitors have proven to be broadly applicable, and compatibility studies have shown some of these active bases to be extremely flexible in formulation, allowing a wide range of corrosion inhibition solutions. Further, some of these novel products also fulfill North Sea environmental criteria for offshore application allowing use globally in environmentally restricted areas. The purpose of this paper is to outline and summarize the performance of this inhibitor class under different conditions and how these materials are meeting the diverse challenges connected to use in the oilfield area. This includes e.g. sweet and sour corrosion, severe brines and various compatibility issues.

Subject
Acids, Water, Inhibitor performance, Corrosion rate, Scale inhibitors, Sodium chloride, Solubility, Solvents, Precorrosion, Fluids, Corrosion inhibitors, Brines, Linear polarization resistance
Keywords:
oilfield, sweet corrosion, sour corrosion, cationic, oligomeric, inhibitor, environmental, heavy brine
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2023
Association for Materials Protection and Performance (AMPP)
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