Session: Corrosion Inhibitors in the Oil and Gas Industry (Part III of III)
Challenging Assumptions in Corrosion Inhibitor Partitioning: Implications for Low Water Cut Environments (C2026-00424)
Thursday, March 19, 2026
4:00 PM - 4:30 PM Central
Location: 362 DE
Earn .5 PDH
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Corrosion inhibitor (CI) products are complex blends whose performance relies on synergistic interactions among components. Altering ratios or omitting ingredients can significantly reduce effectiveness. Prior to field use, inhibitors are tested under simulated conditions. However, due to limited oil availability, lab testing often uses brine-only systems or high water cuts to minimize oil use during pre-partitioning. The resulting brine phase is then used for corrosion testing. To estimate field dosage, partitioning studies are later conducted at realistic water cuts using less oil. These studies, combined with corrosion test data, guide field dose recommendations. However, partitioning is often assessed using a single detectable component or averaged multi-component data—assuming uniform behavior across all ingredients. This assumption is flawed. In reality, components partition differently depending on water cut, and the aqueous-phase composition may diverge significantly from the original formulation. In low water cut systems, oil-soluble components may be underrepresented in the water phase, and simply increasing dosage may not restore performance. This can lead to overconfidence in protection and compromise asset integrity. This paper presents corrosion test results and multi-component residual analyses, highlighting how differential partitioning affects inhibitor performance and reliability, especially in low water cut environments.
