سال انتشار: ۱۳۸۵

محل انتشار: اولین کنگره مهندسی نفت ایران

تعداد صفحات: ۱۱

نویسنده(ها):

A Soudmandasli – School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
S. Sh Ayatollahi – School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
H Mohabatkar – Department of Biology, School of Sciences, Shiraz University, Shiraz, Iran

چکیده:

In this paper capability of two exopolymer producing bacteria (Bacillus licheniformis and Leuconostoc mesenteroides) to reduce the permeability of porous media were investigated and compared with their microbial oil recovery efficiencies. Core flooding experiments were performed at different temperatures (from 40oC to 55oC) and salinities (0% to 10% NaCl). In addition, some experiments were carried out at 40oC to investigate
the effect of microbial activity on the oil viscosity during MEOR process. The results showed for the both bacteria maximum permeability reduction observed at those temperatures and salinities which maximum microbial oil recovery efficiencies were measured showing that for the both bacteria microbial permeability reduction plays an
important role to releasing the oil from porous media. Moreover oil viscosity reduction is found to be another main mechanism for B. licheniformis.