2D visualization of the front digitations using sagittal and transverse slices, for the water-wet case before the core ageing (coreflood CF1–CF5). The displacement is displayed at half the breakthrough on the left and at breakthrough on the right. Positions of the transverse slices are marked by the dotted black lines. The sagittal slicing is illustrated in Figure 7. Injected and displaced fluid’s viscosities are given respectively on the top left and top right of the sagittal slicing measured at half the breakthrough.