| Function type | Interval velocity is subject to rescaling and shifting of seismic interval velocities. |
| Definition of parameters |
A = constant rescaling factor. B = constant shifting factor. Vseis = seismic interval velocity map. |
| Operational applications |
Useful when seismic velocities are available and rescaling is required for coherence with well velocities. Adding a shift to the seismic velocities enables to introduce seismic time as a correcting factor for the seismic velocities. This is relevant if you think that the seismic velocities do not properly capture geological velocity variations. |
$$
V_{int}= A \times V_{seis} + B
$$
$$
DZ = V_{int} \times DT =( A \times V_{seis} + B) \times DT
$$
$$
DZ = A \times DZ_{seis} + B \times DT
$$