TABLE 2.

Distribution of the dominant bacterial and archaeal populations in the ASP-flooded reservoir and the other Chinese oil reservoirs.

Oilfield	Block	°C	Anoxynatronum	Halomonas	Pseudomonas	Thauera	Methanobacterium	Methanosaeta	Methanothermobacter

Except for YC2, all of the above blocks had been water-flooded at some point in the past. Steam soaking technique had been performed in the LHJ reservoir block. ^a16S rRNA gene sequencing was performed on an Illumina MiSeq platform; ^b16S rRNA gene sequencing was performed on a Roche Genome Sequencer GS FLX + platform. The color gradient ranging from green to red represents the increase of relative abundance.