WAYS, STRAINS AND COMPOSITIONS SUITABLE TO INCREASE OIL RECOVERY USING MICRO-ORGANISMS: ARCOBACTER TREASURES 1

摘要

1. A method of increasing oil recovery from an oil reservoir, comprising: a) providing a composition comprising: i) at least one Arcobacter strain belonging to Arcobacter clade 1; and ii) a minimum growth medium containing at least one electron acceptor; b) providing an oil reservoir; c) inoculating the oil reservoir with composition (a) so that the composition containing Arcobacter populates and grows in the oil reservoir; and d) recovering oil from the oil reservoir, while increasing Arcobacter in the oil reservoir increases oil recovery. 2. The method of claim 1, wherein at least one Arcobacter strain belonging to Arcobacter clade 1 comprises a degenerate 16S rDNA consensus sequence of SEQ ID NO: 40.3. The method of claim 1, wherein at least one Arcobacter strain belonging to Arcobacter clade 1 comprises a 16S rDNA sequence having at least about 97% sequence identity with a sequence selected from the group consisting of SEQ ID NO: 1, 2 , 3, 4, 5, 6, 7, 8, and 39.4. The method according to claim 1, wherein the electron acceptor is at least one nitrate ionic salt. The method according to claim 1, wherein the electron acceptor is at least one nitrite ionic salt or a combination of at least one nitrite salt and at least one nitrate salt. The method of claim 1, wherein the oil reservoir includes at least one fluid having a salt concentration of at least about 30 parts per thousand. The method according to claim 1 or 5, wherein the Arcobacter strain belonging to Arcobacter clade 1 comprises a partial 16S rDNA sequence selected from the group consisting of SEQ ID NOs: 1, 33, 34, 35, 36, 37 and 38.8. The method of claim 7, wherein the Arcobacter strain belonging to Arcobacter treasure 1 is selected from the groups