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Application of biosurfactants to wettability alteration and IFT reduction in enhanced oil recovery from oil-wet carbonates
, Article Petroleum Science and Technology ; Volume 31, Issue 12 , Jul , 2013 , Pages 1259-1267 ; 10916466 (ISSN) ; Maghsoudi, E ; Roostaazad, R ; Sharif University of Technology
2013
Abstract
To obtain potentially applicable microorganisms to an effective in situ microbial enhanced oil recovery operation, bacteria that were compatible with the harsh conditions of a petroleum reservoir were isolated from a crude oil sample. The application of an oil spreading technique showed that all of the isolates were capable of producing biosurfactants from both the glucose and crude oil as carbon sources. The secreted biosurfactants could at least reduce the surface tension 20 mN/m and for one of the isolates; the surface tension value dropped below 40 mN/m. In addition, the contact angle measurements revealed that the produced biosurfactants could effectively alter the wettability of the...