biostudies-literatureUnknown11Ren GPolymer flooding technology and alkaline-surfactant-polymer (ASP) flooding technology have been widely used in some oil reservoirs. About 50% of remaining oil is trapped, however, in polymer-flooded and ASP-flooded reservoirs. How to further improve oil recovery of these reservoirs after chemical flooding is technically challenging. Microbial enhanced oil recovery (MEOR) technology is a promising alternative technology. However, the bacterial communities in the polymer-flooded and ASP-flooded reservoirs have rarely been investigated. We investigated the distribution and co-occurrence patterns of bacterial communities in ASP-flooded and polymer-flooded oil production wells. We found that <i>Arcobacter</i> and <i>Pseudomonas</i> were dominant both in the polymer-flooded and ASP-flooded produFrontiers in microbiology580363https://www.ebi.ac.uk/biostudies/studies/S-EPMC7736161biostudies-literatureCompositions and Co-occurrence Patterns of Bacterial Communities Associated With Polymer- and ASP-Flooded Petroleum Reservoir Blocks.PMC7736161Li WDou XRen GLi YBian LQu LZhang YLe JHu MBai LChen XWang JfalseCompositions and Co-occurrence Patterns of Bacterial Communities Associated With Polymer- and ASP-Flooded Petroleum Reservoir Blocks.Polymer flooding technology and alkaline-surfactant-polymer (ASP) flooding technology have been widely used in some oil reservoirs. About 50% of remaining oil is trapped, however, in polymer-flooded and ASP-flooded reservoirs. How to further improve oil recovery of these reservoirs after chemical flooding is technically challenging. Microbial enhanced oil recovery (MEOR) technology is a promising alternative technology. However, the bacterial communities in the polymer-flooded and ASP-flooded reservoirs have rarely been investigated. We investigated the distribution and co-occurrence patterns of bacterial communities in ASP-flooded and polymer-flooded oil production wells. We found that <i>Arcobacter</i> and <i>Pseudomonas</i> were dominant both in the polymer-flooded and ASP-flooded produ2020-01-01T00:00:00Z20202025-04-20T00:51:23.019Z2025-04-20T00:51:23.019ZS-EPMC77361613333551610.3389/fmicb.2020.580363