Bacterial profile modification is an important enhanced oil recovery technique used to direct injected water into a reservoir's low permeability zone containing trapped crude oil. During water flooding, the use of bacteria to plug the high permeability water zone and divert flow into the oil-bearing low-permeability zone will have a significant economic impact. However, during the field implementation of bacterial profile modification, the rapid growth of bacteria near the injection well bore may hinder the subsequent injection of growth media so that profile modification of the reservoir occurs only in the immediate vicinity of the well bore. By slowing the growth rate and prolonging the lag phase, the onset of pore-space plugging may be delayed and the biologically active zone extended deep into the reservoir. High substrate loading, high pH values, and the addition of the growth inhibitors @entity3208 and @entity7717 have been used in combination to alter the growth characteristics of @entity14921 NRRL-B523 grown in batch conditions. The highest @entity969 concentration used in these studies, 500 g/L, produced lag times 12-fold greater than the slowest lag times achieved at low @entity969 concentrations. When @entity14921 was grown in media containing 500 g/L @entity969 , an alkaline pH value threshold was found above which bacteria did not grow. At this threshold pH value of 8.1, an average lag time of 200 h was observed. Increasing the concentration of @entity7717 had no effect on lag time, but reduced the growth rate until the threshold concentration of 0.6%, above which bacteria did not grow. Last, it was found that a solution of 0.075 mM @entity3208 in media containing 15 g/L @entity969 completely inhibited bacterial growth.

Alteration of the growth rate and lag time of XXXX NRRL-B523.

@entity969 :: ('MESH:D013395', 'Chemical') :: ['sucrose'] @entity7717 :: ('MESH:D020160', 'Chemical') :: ['sodium benzoate'] @entity14921 :: ('1245', 'Species') :: ['Leuconostoc mesenteroides', 'L. mesenteroides'] @entity3208 :: ('MESH:D012967', 'Chemical') :: ['sodium dodecylsulfate']
@entity14921 :: (1245,Species) :: ['Leuconostoc mesenteroides']
