TY - JOUR
T1 - Effects of indigenous microbial consortia for enhanced oil recovery in a fragmented calcite rocks system
AU - Gaytán, I.
AU - Mejía, M. A.
AU - Hernández-Gama, R.
AU - Torres, L. G.
AU - Escalante, C. A.
AU - Muñoz-Colunga, Ana
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Two indigenous bacterial consortia, IMP-100 and IMP-200, proved to have a functional effect on heavy crude oil recovery, indicating a potential implementation in Microbial Enhanced Oil Recovery (MEOR). Growth kinetics of the indigenous bacterial population was performed under anaerobic conditions at 70°C and 33gL-1 of salinity. It was found that both extremophile consortia were able to grow under the latter conditions. Moreover, they synthesized metabolites that altered the surface properties of the supernatants derived from cell cultures, a useful property in oil recovery processes. Ex situ fermentations in the presence of crude oil-impregnated calcite rocks demonstrated that both bacterial consortia enhance crude oil recovery by 8.5% and 13%. In order to identify possible phenomena responsible for incremental oil recovery, emulsification index (E24), surface tension, cell adhesion to hydrocarbons, and crude oil viscosity were characterized. The results demonstrate that IMP-(100, 200) consortia were able to recover heavy crude oil from calcite rocks, possibly due to a decrease in crude oil viscosity, induced by the presence of metabolites and/or the interaction between bacteria and oil hydrocarbons.
AB - Two indigenous bacterial consortia, IMP-100 and IMP-200, proved to have a functional effect on heavy crude oil recovery, indicating a potential implementation in Microbial Enhanced Oil Recovery (MEOR). Growth kinetics of the indigenous bacterial population was performed under anaerobic conditions at 70°C and 33gL-1 of salinity. It was found that both extremophile consortia were able to grow under the latter conditions. Moreover, they synthesized metabolites that altered the surface properties of the supernatants derived from cell cultures, a useful property in oil recovery processes. Ex situ fermentations in the presence of crude oil-impregnated calcite rocks demonstrated that both bacterial consortia enhance crude oil recovery by 8.5% and 13%. In order to identify possible phenomena responsible for incremental oil recovery, emulsification index (E24), surface tension, cell adhesion to hydrocarbons, and crude oil viscosity were characterized. The results demonstrate that IMP-(100, 200) consortia were able to recover heavy crude oil from calcite rocks, possibly due to a decrease in crude oil viscosity, induced by the presence of metabolites and/or the interaction between bacteria and oil hydrocarbons.
KW - Bioproducts
KW - Heavy crude oil
KW - Indigenous consortia
KW - Microbial Enhanced Oil Recovery (MEOR)
KW - Surface properties
UR - http://www.scopus.com/inward/record.url?scp=84924310017&partnerID=8YFLogxK
U2 - 10.1016/j.petrol.2015.02.028
DO - 10.1016/j.petrol.2015.02.028
M3 - Artículo
SN - 0920-4105
VL - 128
SP - 65
EP - 72
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
ER -