Using the Power of Molecular Microbiological Methods in Oilfield Corrosion Management to Diagnose MIC
Victor V. Keasler and Indranil Chatterjee
from: Applications of Molecular Microbiological Methods (Edited by: Torben L. Skovhus, Sean M. Caffrey and Casey R.J. Hubert). Caister Academic Press, U.K. (2014)
It is well established that microbes present in oilfield systems can cause several problems for operators such as hydrogen sulfide (H2S) production, microbiologically influenced corrosion (MIC), and/or biofouling. However, it is still being debated as to exactly what types of organisms actually cause these problems and whether their presence alone is enough to prove that the associated problems are going to be encountered. This chapter highlights two different case histories where microbes were previously believed to be of minimal risk based on culture-based enumeration. However, molecular characterization revealed elevated microbial numbers as well as a potential high risk species in both systems as the predominant sessile organism and a potential significant asset integrity risk. Interestingly, the outcome with regards to localized corrosion was very different between the two systems. This chapter is a reminder that the data obtained through molecular analysis is most valuable when it is correlated back to a system key performance indicator (KPI) to enable smart decisions read more ...