Figure 1.49: Seismic data are colourful, not to make data pretty, but to convey information. Variable-intensity colour is an essential tool for interpretation of stratigraphy, hydrocarbons, porosity and reservoir properties. Variations in amplitude, phase, frequency, velocity, or any other trace-related attribute can be represented by different colours or shades of grey to black. Inge Grødum’s 1980 view is: ‘Leiv’ has fired a shot with his seismic gun; to his surprise, the sea looks like the colourful seismic displays which geophysicists produce in seismic data processing.
