This paper discusses how internal corrosion predictive modeling (ICPM)was used to model theoretical flow scenariosin the20in× 30.25 km crude oil pipeline (CR195) to determine the best course of action forfuturepipeline integrity. The client had proposed the addition of heavy oil to CR195, which was flowing conventional oil. The MP-ICDAmethodology (excluding Step 3 Detailed Examination) was used to determine the potential consequential impact of commingling heavy oil withconventional oil incomparison to flowing conventional oil alone. The conventional oil had both a very high CO2and water content. The heavy crude oil had a lower corrosivity than the conventional crude oil. This paper describes the methodologies and sensitivity analyses performed to capture the nuances associated with each sensitivity analysis on an accurate basis. The modeling led to operational conclusions regarding the impacts associated with commingling. For both scenarios, recommendations were made to lower the corrosivity and ensure pipeline integrity going forward, including performing verification digs after MP-ICDA was completed.

Key words:MP-ICDA, internal corrosion predictive modeling, ICPM,indirect inspection