| 摘要 |
The present invention relates to estimating a velocity of a geological layer, and in particular, relates to estimating Dix interval velocities based on root-mean-square (RMS) velocity data. The method comprises providing a first, initial model comprising an interval velocity associated with a subsurface location and an uncertainty associated with the interval velocity. Next, data is provided comprising an actual or approximated RMS velocity associated with a subsurface location and an uncertainty associated with the RMS velocity. Then, a second model comprising an interval velocity associated with a subsurface location and an uncertainty associated with the interval velocity is estimated, based on the interval velocity and the uncertainty of the first model, and the RMS velocity and the uncertainty of the data. The interval velocities of the first model and/or the second model may be Dix interval velocities which are the RMS average of the velocities within a layer. The second model may be estimated by performing a Bayesian inversion of the RMS velocities and may be represented by a multi-Gaussian distribution. |
