Research Article

Study on Damage Mechanism of Waterflooding Development in Weizhou 11-4N Low-Permeability Oilfield

Table 6

Throat data before and after the D2 core experiment.

Mainstream throat radius (μm)Maximum throat radius (μm)Average throat radius (μm)Relative sorting coefficientHomogeneity coefficient

Before speed sensitivity experiment4.686.304.630.370.69
After speed sensitivity experiment3.987.404.360.320.56