Understanding Seismic Velocities, Interval, Avg, NMO, RMS, Stacking velocity

, velocity, seismic, oilandgas, dataprocessing, geophysics Understanding Seismic Velocities such as Interval, Avg, NMO, RMS, Stacking velocity. Interval Velocity: Vint Is the constant velocity of a single layer (which can be very thin). Vintcan be approximately calculated from Vrmsusing the DIX equation. Normal Moveout (NMO) Velocity:Vnmo Is the velocity required to best NMO correct the data using the hyperbolic NMO assumption. Root Mean Square (RMS) Velocity :Vrms The rootmeansquare (RMS) velocity is calculated from interval velocities. At large offsets more accurate NMO corrections can be performed by retaining the next term of the equation this is usually referred to by contractors as fourthorder or higher order NMO correction. For many targets, this can become important at offsets greater than around 3km. Thank yo