Insights into Enhanced Oil Recovery by Coupling Branched-Preformed Particle Gel and Viscosity Reducer Flooding in Ordinary Heavy Oil Reservoir

Table 4

The incremental oil recovery results of viscosity reducer flooding at different flooding stages.

No.	Chemical slug	Water flooding recovery (%)	Chemical flooding recovery (%)	Incremental oil recovery (%)
1#	S1	40.6	47.9	7.3
2#	S2	40.3	47.8	7.5
3#	S3	39.1	44.7	5.6