Print version ISSN 0100-4042
CRUZ, Georgiana Feitosa da and MARSAIOLI, Anita Jocelyne. Natural processes of petroleum biodegradation in reservoirs. Quím. Nova [online]. 2012, vol.35, n.8, pp.1628-1634. ISSN 0100-4042. http://dx.doi.org/10.1590/S0100-40422012000800024.
Petroleum biodegradation in reservoirs is a process caused by different microorganisms affecting many oil deposits which modifies the oil composition in a quasi-stepwise process starting from n-alkanes and isoprenoids through to diasteranes. This causes oil souring and increased viscosity, sulfur and metal content, having a direct impact on oil production and refining costs.
Keywords : aerobic and anaerobic microorganisms; petroleum biomarkers; oil composition.