b'Business directory below the time slice and its full extent is not visible. After applying a vertical stack, the area of the flat reflection is much larger than the time slice suggests (Figure 4).Applying these horizontal and vertical stacks to the seismic data is a quick way to enhance reflections associated with hydrocarbon contacts and speed up the hunt for prospects.Figure 4.After applying a vertical stack filter to the data a more extensive oil-water contact (red polygon) is recognised.Business directoryFEBRUARY 2020 PREVIEW 32'