Oil Bio Destruction Suppression
Development of Oil Bio Destruction Suppression Methods in Industrial and Natural Storages
Tech Area / Field
- BIO-IND/Industrial Biotechnology/Biotechnology
- CHE-IND/Industrial Chemistry and Chemical Process Engineering/Chemistry
- NNE-FUE/Fuels/Non-Nuclear Energy
8 Project completed
Senior Project Manager
VNIIEF, Russia, N. Novgorod reg., Sarov
- Moscow State University / Department of Chemistry, Russia, Moscow
- Laurentian University, Canada, ON, Sudbury
Project summaryThe problem of oil and oil products degradation in industrial long-term storage reservoirs became especially urgent in connection with massive backfill of such products for strategic goals. The problem of deterioration of oil quality under the condition of continuous oilfield exploitation by method of multiple water flooding has also been revealed. Recent investigations have proved that the process of oil degradation is mainly caused by microorganisms, above all by anaerobic bacteria. Although oil carbohydrates were traditionally considered resistant to anaerobic degradation, a number of cultures able to oxidize such compounds without oxygen by using sulphate, nitrate, iron ions and even CO2 as electron accepters have been isolated/identified. As a result of the processes described above and also accompanying microbiological processes oil and oil products kept in reservoirs undergo a number of transformations and become harder and tougher, gases get dehydrated, and a number of by-products, such as CO2, methane, H2S and organic acids are formed.
In view of the problems described above the main aim of the project is a detailed study of the processes of microbiological degradation of oil and oil products, revelation of the factors facilitating acceleration of such processes and development of methods of their suppression. Identification of the range of products formed and their generation kinetics under various oil storage conditions, as well as isolation and description of steady microbe associations and (if possible) pure cultures, responsible for microaerophile and anaerobic oxidization of carbohydrates will to a considerable degree enable us to clarify the gears of the processes, resulting in deterioration of oil quality and slow down/eliminate their progress. Furthermore, understanding of the gears will enable us to create conditions hindering the process of microbiological conversion of oil and oil fuel in natural oil reservoirs.