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Abstract
In Baolige oilfield, through the research and field implementation of microbial flooding technology, some application effects had been achieved. In order to further improve the implementation effect, the microbial community in the produced liquid during microflooding was tracked, monitored and analyzed by high-throughput sequencing (NGS). The results showed that the microflora diversity was plentiful. The species diversity after micro-flooding was higher than that during micro-flooding. In microbial flooding stage, due to replenish nutrients and exogenous bacteria to reservoir, the advantage bacteria group was mainly Pseudomonas, Acinetobacter, Thauera and Wallingella. After the microbial flooding, due to stop supplying nutrients, the bacteria community changed. The relative abundance of hydrocarbon-degrading bacteria declined and that of anaerobic aerogen increased.
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Details
1 Engineering Technology Research Institute, Huabei Oilfield Company of PetroChina, Renqiu, He Bei Province, 062552, China
2 Research Institute of Exploration and Development, Huabei Oilfield Company of PetroChina, Renqiu, He Bei Province, 062552, China
3 Materials Department of Huabei Oilfield Administration co. LTD, Renqiu, He Bei Province, 062552, China