Petroleum Biogeochemistry endeavors study of cycles of chemical elements such as carbon and nitrogen interactions with their incorporation into living organisms then transported through the earth scale biological systems in geological space and time culminating into the formation of a yellowish-black natural liquid (crude oil) in geological formations beneath the Earth's surface. Fossil fuel petroleum (crude oil) is formed when large quantities of dead organisms, mostly zooplanktons, algae and other organisms buried underneath sedimentary rock and subjected to both intense heat and pressure.
The biological origin crude oil and accumulation of petroleum in reservoirs underneath the rocks coupled up with biologically mediated mining, oil spill is significant to warrant Petroleum Biogeochemical studies. Further, microbial activity in oil spill and petroleum product pollution of aquatic and terrestrial ecosystems is important to be understood. Potential economic losses occasioned by microbial activity on petroleum during transport and storage are worthwhile to investigate and understand.