Study on Distribution Characteristics and Displacement Mechanism of Microscopic Residual Oil in Heterogeneous Low Permeability Reservoirs

<div>Curves of injection pore volume versus oil displacement efficiency under different permeability ratios for the polymeric surfactant: (a) oil displacement efficiency and water cut; (b) pressure.</div>

Geofluids

fig11

Figure 11

Figure 11: Study on Distribution Characteristics and Displacement Mechanism of Microscopic Residual Oil in Heterogeneous Low Permeability Reservoirs 