Translations:Instantaneous attributes - book/31/en

A high-amplitude portion of a seismic trace that can be interpreted as resulting from such a high-amplitude reflectivity is called a bright spot. For example, the density and velocity from a gas-sand zone might be ${\rho }_{1}={\rm {1.8\;gm/c}}{\rm {m}}^{3}$, $V_{1}={\rm {1.6\;km/s}}$. The corresponding values for an oil-sand zone might be ${\rho }_{2}={2.1\;}{\rm {gm/c}}{\rm {m}}^{3}$, ${\rm {V}}_{2}={2.1\;}{\rm {km/s}}$. The reflection coefficient of the gas-oil contact then would be